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You searched for: Subject term X-ray diffraction Remove constraint Subject term: X-ray diffraction Subject term cations Remove constraint Subject term: cations
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1. Robust thermal performance of red-emitting phosphor composites for white light-emitting diodes: Energy transfer and oxygen-vacancy induced electronic localization

Author:
Wasim Ullah Khan; Waheed Ullah Khan; Yan Peng; Zhiyuan Cheng; Tawfik A. Saleh; Yueli Zhang
Source:
Journal of colloid and interface science 2021 v.600 pp. 219-228
ISSN:
0021-9797
Subject:
X-ray diffraction; borates; cations; cerium; color; electron paramagnetic resonance spectroscopy; emissions factor; energy transfer; luminescence; oxygen; reflectance spectroscopy; thermal stability; transmission electron microscopy
Abstract:
... Ce³⁺ ion can effectively sensitize Sm³⁺ ion via energy transfer, and this phenomenon can led to the development of white light-emitting diodes (WLED). However, interestingly, high correlated color temperature (CCT), poor color-rending index (CRI), poor thermal stability, and low efficacy of available red phosphor still pose immense challenges. Herein, we undertook a combined analysis: X-ray diffra ...
DOI:
10.1016/j.jcis.2021.04.139

2. Thermally induced cation ordering in [Formula: see text], [Formula: see text] for sensing thermal history through photoluminescence

Author:
Megha Jain; Manju; Manish Kumar; Hyun Hwi Lee; Sung Ok Won; Keun Hwa Chae; Govind Gupta; Ankush Vij; Anup Thakur
Source:
Journal of materials science 2021 v.56 no.21 pp. 12111-12120
ISSN:
0022-2461
Subject:
X-ray absorption spectroscopy; X-ray diffraction; cations; color; energy; heat treatment; oxygen; photoluminescence
Abstract:
... Applicability of spinel compounds is mainly governed by cation distribution in them. In the presented study, thermally induced cation ordering is found to influence the emission color of [Formula: see text], [Formula: see text] co-doped [Formula: see text] spinel. Cation distribution is monitored through Mg K-edge, Fe [Formula: see text]-edge, O K-edge X-ray absorption near edge structure spectros ...
DOI:
10.1007/s10853-021-06036-4

3. Synthesis and optical and electronic properties of one-dimensional sulfoxonium-based hybrid metal halide (CH₃)₃SOPbI₃

Author:
Yuki Tanaka; Shiqiang Bai; Xizu Wang; Si Yin Tee; Siew Lay Lim; Lin Ke; Surani B. Dolmanan; Coryl Jing Jun Lee; Poh Chong Lim; Xiang Yao; Jishan Wu; Ming-Yong Han
Source:
Chemical communications 2021 v.57 no.47 pp. 5790-5793
ISSN:
1364-548X
Subject:
X-ray diffraction; cations; chemical communication; crystals; halides; metals; optical properties
Abstract:
... We report the synthesis and optical and electronic properties of a one-dimensional sulfoxonium-based hybrid metal halide in an orthorhombic crystal system with a Pnma space group. To provide direct insights, a method is developed to calculate tolerance factors with the ionic radii of non-spherical cations from X-ray crystallographic data. ...
DOI:
10.1039/d1cc01386f

4. Crystal Structure Evolution of Slawsonite SrAl₂Si₂O₈ and Paracelsian BaAl₂Si₂O₈ upon Compression and Decompression

Author:
Liudmila A. Gorelova; Anna S. Pakhomova; Maria G. Krzhizhanovskaya; Dmitrii V. Pankin; Sergey V. Krivovichev; Leonid S. Dubrovinsky; Anatoly V. Kasatkin
Source:
Journal of physical chemistry 2021 v.125 no.23 pp. 13014-13023
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-ray diffraction; aluminum; cations; crystal structure; phase transition; silicon
Abstract:
... The high-pressure behavior of slawsonite, SrAl₂Si₂O₈, has been studied using in situ single-crystal X-ray diffraction (SCXRD) and Raman spectroscopy up to 31 GPa. Slawsonite undergoes displacive phase transition between 6 and 8 GPa with the formation of slawsonite-II, featuring fivefold coordinated silicon and aluminum. The results have been confirmed by the changes in vibrational modes using Rama ...
DOI:
10.1021/acs.jpcc.1c02949

5. Effects of chromium/fluorine co-doping on the electrochemical performance of Li1.2Ni0.13Co0.13Mn0.54O2 cathode material for lithium-ion batteries

Author:
Xinping Huang; Zhengyu Zhang; Jielong He; Zhe Bai; Lu Lu; Jun Li
Source:
Journal of materials science 2021 v.56 no.16 pp. 9836-9851
ISSN:
0022-2461
Subject:
X-ray diffraction; cathodes; cations; chromium; crystal structure; electric potential difference; electrochemistry; energy density; fluorine; industry; lithium; transmission electron microscopy
Abstract:
... Li-rich layered oxides are identified as the most promising cathode material for lithium ion batteries due to their high specific capacity and energy density. However, capacity fading, voltage decay and inferior rate capability have restricted its development in industry. Herein, we developed a novel cation/anion (chromium/fluorine) co-doping methods to enhance the electrochemical performance of L ...
DOI:
10.1007/s10853-021-05922-1

6. Impact of Ionic Liquids on Effectiveness of Tuning the Emissivity of Multilayer Graphene

Author:
Huang Huang; Junxiao Li; Haibo Ke; Yangjian Du; Wenlian Peng; Mengyan Dai; Yufeng Zhang; Xue-ao Zhang
Source:
ACS applied materials & interfaces 2021 v.13 no.22 pp. 26256-26263
ISSN:
1944-8252
Subject:
Raman spectroscopy; X-ray diffraction; camouflage; cations; chemical reactions; cooling; electric potential difference; graphene; ionic liquids
Abstract:
... Multilayer graphene has been employed as a functional material for tuning the emissivity in mid- and long-infrared range, which shows great potential for various applications, such as radiative cooling and thermal camouflage. However, the stability of the multilayer graphene is not sufficient for practical applications yet. Even though it is reported that the integrity of the multilayer graphene i ...
DOI:
10.1021/acsami.0c22167

7. High-Capacity Aqueous Storage in Vanadate Cathodes Promoted by the Zn-Ion and Proton Intercalation and Conversion–Intercalation of Vanadyl Ions

Author:
SaeWon Kim; Xiaoqiang Shan; Milinda Abeykoon; Gihan Kwon; Daniel Olds; Xiaowei Teng
Source:
ACS applied materials & interfaces 2021 v.13 no.22 pp. 25993-26000
ISSN:
1944-8252
Subject:
X-ray absorption spectroscopy; X-ray diffraction; cathodes; cations; electrochemistry; sodium; vanadyl ions
Abstract:
... Aqueous Zn-ion batteries (AZIBs) are promising alternatives to lithium-ion batteries in stationary storage. However, limited storage capacity and cyclic life impede their large-scale implementation. We report reversible electrochemical insertion of multi-ions into sodium vanadate (NaV₃O₈) cathode materials for AZIBs, achieving a maximum storage capacity of 450 mAh g–¹ at 0.05 A g–¹ and a capacity ...
DOI:
10.1021/acsami.1c04279

8. Heterovalent Biᴵᴵᴵ/Pbᴵᴵ Ionic Substitution in One-Dimensional Trimethylsulfoxonium Halide Pseudo-Perovskites (X = I, Br)

Author:
Candida Pipitone; Francesco Giannici; Antonino Martorana; Gonzalo García-Espejo; Silvia Carlotto; Maurizio Casarin; Antonietta Guagliardi; Norberto Masciocchi
Source:
Journal of physical chemistry 2021 v.125 no.21 pp. 11728-11742
ISSN:
1932-7455
Subject:
X-ray diffraction; bismuth; cations; crystal structure; crystallization; density functional theory; iodides; metal ions
Abstract:
... We report on the synthesis and characterization of novel lead and bismuth hybrid (organic–inorganic) iodide and bromide pseudo-perovskites (ABX₃) containing the trimethylsulfoxonium cation (CH₃)₃SO⁺ (TMSO) in the A site, Pb/Bi in the B site, and Br or I as X anions. All of these compounds are isomorphic and crystallize in the orthorhombic Pnma space group. Lead-based pseudo-perovskites consist of ...
DOI:
10.1021/acs.jpcc.1c02571

9. The mechanism of bulky imidazolium cation storage in dual graphite batteries: a spectroscopic and theoretical investigation

Author:
Zichuan Lv; Haining Cao; Shuai Zhou; Kaihao Geng; Huiping Du; Yinghui Bian; Hui Chen; Hao Huang; Yuxia Li; Meng-Chang Lin
Source:
Journal of materials chemistry A 2021 v.9 no.19 pp. 11595-11603
ISSN:
2050-7496
Subject:
Raman spectroscopy; X-ray diffraction; adsorption; carbon electrodes; cations; energy; graphene; imidazoles; ionic liquids; thermodynamics
Abstract:
... Dual graphite batteries (DGBs) employ graphite as an intercalation host and store energy using the redox reactions of ionic liquid electrolyte-derived ions with graphite electrodes. As bulky (e.g., imidazolium-based) cation intercalation into the negative graphite electrode may cause its deterioration and thus aggravate self-discharge behaviour, a deep mechanistic understanding of such intercalati ...
DOI:
10.1039/d1ta00103e

10. Room-Temperature Electron Paramagnetic Resonance Study of a Copper-Related Defect in Cu₂ZnSnS₄ Colloidal Nanocrystals

Author:
Igor Vorona; Volodymyr Dzhagan; Valentyna Nosenko; Serhiy Kondratenko; Oleksandr Selyshchev; Mykhailo Valakh; Serhiy Okulov; Nazar Mazur; Oleksandra Raievska; Oleksandr L. Stroyuk; Dietrich R. T. Zahn
Source:
Journal of physical chemistry 2021 v.125 no.18 pp. 9923-9929
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; ambient temperature; cations; chemical composition; copper; copper zinc tin sulfide; crystal structure; electron paramagnetic resonance spectroscopy; nanocrystals; stoichiometry; tin; zinc
Abstract:
... We report on electron paramagnetic resonance (EPR) spectroscopy of Cu–Zn–Sn–S (CZTS) nanocrystals (NCs) synthesized by a colloidal chemistry method. The chemical composition of the NCs is characterized by a strong deficit of tin and slight zinc enrichment with respect to the “ideal” stoichiometry of kesterite Cu₂ZnSnS₄. Nevertheless, X-ray photoemission spectroscopy (XPS) shows that the net cation ...
DOI:
10.1021/acs.jpcc.1c02176

11. The guanidinium t-diaqua-bis(oxalato)chromate(III) dihydrate complex: synthesis, crystal structure, EPR spectroscopy and magnetic properties

Author:
Idelle Nono Kamga; Augustin Nkwento Nana; Bridget Ndoye Ndosiri; Frédéric Capet; Michel Foulon; Justin Nenwa
Source:
Zeitschrift für Naturforschung 2021 v.76 no.3-4 pp. 211-216
ISSN:
1865-7117
Subject:
X-ray diffraction; cations; chromates; crystal structure; electron paramagnetic resonance spectroscopy; guanidinium; hydrogen; ligands; magnetism; oxygen; thermogravimetry
Abstract:
... A new salt (CH₆N₃)[t-Cr(C₂O₄)₂(H₂O)₂]·2H₂O (1) (CH₆N₃⁺ = guanidinium cation) has been synthesized and characterized by single-crystal X-ray diffraction, FT-IR and UV–Vis spectroscopies, elemental and thermogravimetric analyses. In the crystal structure of 1, the chromate(III) ion lies on an inversion center in the form of an elongated octahedron. The coordination sphere consists of four oxygen ato ...
DOI:
10.1515/znb-2021-0006

12. Effectiveness of fresh cement kiln dust as a soil stabilizer and stabilization mechanism of high swelling clays

Author:
Waleed Abdelmoghny Metwaly Ogila
Source:
Environmental earth sciences 2021 v.80 no.7 pp. 283
ISSN:
1866-6280
Subject:
X-ray diffraction; aluminum oxide; calcium; cation exchange; cations; cement; clay; compression strength; dust; electrical conductivity; flood irrigation; humans; kilns; liquids; montmorillonite; pH; plasticity; sewage; silica; soil stabilization; stabilizers; sulfates; urbanization; water content; Egypt
Abstract:
... The expansive clay soils, which cover most of the new urbanized areas in Egypt, create major damages in most of the engineering structures and infrastructures such as buildings, roads, bridges, pipelines and others due to bad human activities, e.g. lack of maintenance for sewage and drinking lines, and flood irrigation of golf areas which causes fluctuation of water content through the foundation ...
DOI:
10.1007/s12665-021-09589-4

13. Visible-light-responsive polyoxometalate-based metal–organic framework for highly efficient photocatalytic oxidative coupling of amines

Author:
Jie Li; Bowen Chang; Haiyan Zhao; Qingxi Meng; Mingxue Li; Qiuxia Han
Source:
Journal of materials science 2021 v.56 no.11 pp. 6676-6688
ISSN:
0022-2461
Subject:
X-ray diffraction; catalysts; cations; coordination polymers; electron paramagnetic resonance spectroscopy; imines; ligands; light; magnetic susceptibility; naphthalene; oxidants; oxidation; photocatalysis; photosensitizing agents
Abstract:
... The exploration of new highly efficient and durable for the oxidation of amines to imines has gained immense attention. In this work, a new polyoxometalate-based metal–organic framework (POMOF) {Cu₄(C₂₆H₁₆N₄O₄)₄(CH₃CN)₂[SiW₁₂O₄₀]}·4H₂O (SiW-Cu-DPNDI) was constructed with a catalytic oxidant Keggin-type [SiW₁₂O₄₀]⁴⁻ anion, a photosensitizer N,N'-bis(4-pyridylmethyl)naphthalene diimide (DPNDI) ligan ...
DOI:
10.1007/s10853-020-05707-y

14. Transformation of Hexagonal Birnessite upon Reaction with Thallium(I): Effects of Birnessite Crystallinity, pH, and Thallium Concentration

Author:
Mismel Ruiz-Garcia; Mario Villalobos; Andreas Voegelin; Teresa Pi-Puig; Nadia Martínez-Villegas; Jörg Göttlicher
Source:
Environmental science & technology 2021 v.55 no.8 pp. 4862-4870
ISSN:
1520-5851
Subject:
X-radiation; X-ray diffraction; ambient temperature; birnessite; cations; crystal structure; environmental science; manganese oxides; oxidation; pH; technology; thallium; transmission electron microscopy
Abstract:
... We examined the uptake of Tl(I) by two hexagonal birnessites and related phase transformations in laboratory experiments over 12 sequential additions of 0.01 M Tl(I)/Mn at pH 4.0, 6.0, and 8.0. The Tl-reacted Mn oxides were characterized for their structure, Tl binding, and morphology using X-ray diffraction, X-ray photoelectron and X-ray absorption spectroscopies, and transmission electron micros ...
DOI:
10.1021/acs.est.0c07886

15. Highly Stable Polyoxovanadate-Based Zn–MOF with Dual Active Sites as a Solvent-free Catalyst for C–C Bond Formation

Author:
Hongrui Tian; Shumei Liu; Zhong Zhang; Tianyi Dang; Ying Lu; Shuxia Liu
Source:
ACS sustainable chemistry & engineering 2021 v.9 no.12 pp. 4660-4667
ISSN:
2168-0485
Subject:
Lewis acids; Lewis bases; X-ray diffraction; anions; catalysts; catalytic activity; cations; condensation reactions; green chemistry; molecular weight; synergism; zinc
Abstract:
... A polyoxovanadate-based zinc–organic framework, [Zn(bix)]{V₂O₆}(V-Zn-MOF, bix = 1,4-bis(imidazole-1-ylmethyl)benzene), was successfully synthesized under hydrothermal conditions. Single-crystal X-ray analysis reveals that the V-Zn-MOF contains {V₂O₆}ₙ²ⁿ– polyanion chains and [Zn(bix)]²⁺ cation frameworks with open zinc metal sites, which endows V-Zn-MOF-rich Lewis base and acid sites. Considering ...
DOI:
10.1021/acssuschemeng.1c00389

16. Kinetic Control of the Li₀.₉Mn₁.₆Ni₀.₄O₄ Spinel Structure with Enhanced Electrochemical Performance

Author:
F. A. Vásquez; N. C. Rosero-Navarro; A. Miura; R. Jalem; Y. Goto; M. Nagao; Y. Tateyama; K. Tadanaga; J. A. Calderón
Source:
ACS applied materials & interfaces 2021 v.13 no.12 pp. 14056-14067
ISSN:
1944-8252
Subject:
X-ray absorption spectroscopy; X-ray diffraction; cations; cobalt; coprecipitation; crystal structure; density functional theory; electrochemistry; energy; lithium batteries; manganese; nickel oxide; oxygen; toxicity; transmission electron microscopy
Abstract:
... The development of more sustainable societies has become an urgent goal worldwide. Electrical batteries are currently seen as one of the most important energy storage technologies for the development of decarbonized societies. However, many lithium-ion battery manufacturers currently utilize cobalt, a toxic and hazardous mineral, in their batteries. Lithium-deficient manganese nickel oxide spinels ...
DOI:
10.1021/acsami.0c17886

17. Enhanced removal of hydrogen sulfide using novel nanofluid system composed of deep eutectic solvent and Cu nanoparticles

Author:
Xinpeng Liu; Baohua Wang; Xiaoli Lv; Qingmei Meng; Menghong Li
Source:
Journal of hazardous materials 2021 v.405 pp. 124271
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; absorbents; absorption; cations; choline; copper nanoparticles; desulfurization; energy; ethanolamine; hydrogen sulfide; nanofluids; solvents; sulfur; transmission electron microscopes
Abstract:
... The H₂S removal performances of four deep eutectic solvent (DES) based nanofluid (NF) systems were measured using dynamic absorption experiment. The Cu containing NF system is found to be an excellent absorbent for H₂S removal with a significantly enhanced desulfurization performance compared with DES original solution. Besides, the NF systems have relatively high regeneration performance. The NF ...
DOI:
10.1016/j.jhazmat.2020.124271

18. Manganese containing copper aluminate catalysts: Genesis of structures and active sites for hydrogenation of aldehydes

Author:
Christoph Dörfelt; Michelle Hammerton; David Martin; Alexander Wellmann; Clara C. Aletsee; Moniek Tromp; Klaus Köhler
Source:
Journal of catalysis 2021 v.395 pp. 80-90
ISSN:
0021-9517
Subject:
X-ray absorption spectroscopy; X-ray diffraction; active sites; adsorption; aldehydes; butanol; catalysts; catalytic activity; cations; copper; copper nanoparticles; hydrogenation; manganese; models; occupations; oxidation; particles; protonation; protons; reaction mechanisms; temperature
Abstract:
... Copper aluminate spinel (CuO.CuAl₂O₄) is the favoured Cr-free substitute for the copper chromite catalyst (CuO.CuCr₂O₄) in the industrial hydrogenation of aldehydes. New insights in the catalytic mechanism were obtained by systematically studying the structure and activity of these catalysts including effects of manganese as a catalyst component. The hydrogenation of butyraldehyde to butanol was s ...
DOI:
10.1016/j.jcat.2020.12.017

19. A simple cation exchange model to assess the competitive adsorption between the herbicide paraquat and the biocide benzalkonium chloride on montmorillonite

Author:
Romina Ilari; Mariana Etcheverry; Carolina V. Waiman; Graciela P. Zanini
Source:
Colloids and surfaces 2021 v.611 pp. 125797
ISSN:
0927-7757
Subject:
X-ray diffraction; adsorption; benzalkonium chloride; biocides; cation exchange; cations; clay; montmorillonite; paraquat; pollutants; theoretical models; thermodynamics; zeta potential
Abstract:
... Since adsorption on clay minerals is one of the most popular water-pollutant removal method, it is important to consider the coexistence of several compounds that can affect pollutant retention. In this work, the competitive behaviour between cationic herbicide paraquat (PQ) and a benzalkonium chloride compound (BAC) on montmorillonite (MMT) was performed by adsorption experiments and analysed by ...
DOI:
10.1016/j.colsurfa.2020.125797

20. Interplay between the Reorientational Dynamics of the B₃H₈– Anion and the Structure in KB₃H₈

Author:
M. S. Andersson; J. B. Grinderslev; X.-M. Chen; X. Chen; U. Häussermann; W. Zhou; T. R. Jensen; M. Karlsson; T. J. Udovic
Source:
Journal of physical chemistry 2021 v.125 no.7 pp. 3716-3724
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-ray diffraction; boron; cations; neutrons; physical chemistry
Abstract:
... The structure and reorientational dynamics of KB₃H₈ were studied by using quasielastic and inelastic neutron scattering, Raman spectroscopy, first-principles calculations, differential scanning calorimetry, and in situ synchrotron radiation powder X-ray diffraction. The results reveal the existence of a previously unknown polymorph in between the α′- and β-polymorphs. Furthermore, it was found tha ...
DOI:
10.1021/acs.jpcc.0c10186

21. Controlling Ni²⁺ from the Surface to the Bulk by a New Cathode Electrolyte Interphase Formation on a Ni-Rich Layered Cathode in High-Safe and High-Energy-Density Lithium-Ion Batteries

Author:
Nan-Hung Yeh; Fu-Ming Wang; Chusnul Khotimah; Xing-Chun Wang; Yi-Wen Lin; Shih-Chang Chang; Chun-Chuan Hsu; Yung-Jen Chang; Lester Tiong; Chia-Hao Liu; Ying-Rui Lu; Yen-Fa Liao; Chung-Kai Chang; Shu-Chih Haw; Chih-Wen Pao; Jeng-Lung Chen; Chi-Liang Chen; Jyh-Fu Lee; Ting-Shan Chan; Hwo-Shuenn Sheu; Jin-Ming Chen; Alagar Ramar; Chia-Hung Su
Source:
ACS applied materials & interfaces 2021 v.13 no.6 pp. 7355-7369
ISSN:
1944-8252
Subject:
X-ray absorption spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; cathodes; cations; electric vehicles; energy; energy density; lithium; temperature; transmission electron microscopy
Abstract:
... Ni-rich high-energy-density lithium ion batteries pose great risks to safety due to internal short circuits and overcharging; they also have poor performance because of cation mixing and disordering problems. For Ni-rich layered cathodes, these factors cause gas evolution, the formation of side products, and life cycle decay. In this study, a new cathode electrolyte interphase (CEI) for Ni²⁺ self- ...
DOI:
10.1021/acsami.0c22295

22. Crystallographic and micro-structural investigations in C-phase spinels of CuFe2O4 synthesized through C12H22O11.H2O mediation

Author:
Vibhu T. Sivanandan; Arun S. Prasad
Source:
Micron 2021 v.141 pp. 102993
ISSN:
0968-4328
Subject:
X-ray diffraction; ambient temperature; catalysts; cations; hydrophilicity; nanocrystals; reducing agents; reflectance; semiconductors; ultraviolet-visible spectroscopy
Abstract:
... Nanocrystalline CuFe₂O₄ was synthesized through stotiometric mixing of aqueous solutions of Cu(NO₃)₂. 3H₂O and Fe(NO₃)₃. 9H₂O mediated by α-Lactose monohydrate (C₁₂H₂₂O₁₁.H₂O) as reductant. Aqueous NaOH solution was used as the catalyst and the reaction was carried out at room temperature. The ageing of crystallites in cubic spinel structure was accomplished by annealing the powder sample at 600 ° ...
DOI:
10.1016/j.micron.2020.102993

23. Experimental considerations to study Li-excess disordered rock salt cathode materials

Author:
Hyeseung Chung; Zachary Lebens-Higgins; Baharak Sayahpour; Carlos Mejia; Antonin Grenier; Gabrielle E. Kamm; Yixuan Li; Ricky Huang; Louis F. J. Piper; Karena W. Chapman; Jean-Marie Doux; Ying Shirley Meng
Source:
Journal of materials chemistry A 2021 v.9 no.3 pp. 1720-1732
ISSN:
2050-7496
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; air; batteries; cathodes; cations; electrochemistry; energy density; interphase; thermogravimetry
Abstract:
... Cation-disordered rock salt materials have attracted much interest as high energy density cathode materials due to their anionic electrochemical activity, providing them extra capacity, along with their lower cost. They are, however, still the subject of numerous studies as they suffer from poor cyclability and relatively slow kinetics compared to traditional intercalation materials. In this work, ...
DOI:
10.1039/d0ta07836k

24. Confusing Ions on Purpose: How Many Parent Acid Molecules Can Be Incorporated in a Herbicidal Ionic Liquid?

Author:
Julia L. Shamshina; Hannah B. Wineinger; Hemant Choudhary; Thomas P. Vaid; Steven P. Kelley; Robin D. Rogers
Source:
ACS sustainable chemistry & engineering 2021 v.9 no.4 pp. 1941-1948
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; ambient temperature; betaine; carnitine; cations; dicamba; green chemistry; hydrogen bonding; ionic liquids; ionization; liquids; stoichiometry; zwitterions
Abstract:
... To expand the application range of herbicidal ionic liquids (HILs), we attempted to increase the amount of the systemic herbicide dicamba in its HILs through the formation of neither purely ionic nor neutral hydrogen-bonded complexes (so-called oligomeric ions) of parent acid and conjugate base. We realized we faced an important question—how far is it possible to increase the amount of active spec ...
DOI:
10.1021/acssuschemeng.0c08797

25. Fabrication of Zn-based magnetic zeolitic imidazolate framework bionanocomposite using basil seed mucilage for removal of azo cationic and anionic dyes from aqueous solution

Author:
Mahsa Mahmoodi; Vahid Javanbakht
Source:
International journal of biological macromolecules 2021 v.167 pp. 1076-1090
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; basil; cations; magnetic separation; magnetism; magnetite; methylene blue; mucilages; nanocomposites; surface area; thermodynamics; zinc
Abstract:
... The Basil seeds mucilaginous polysaccharide exhibits remarkable physical and chemical properties like high water-absorbing capacity, emulsifying, and stabilizing properties. The metal-organic frameworks are one of the most promising precursors made of metal clusters and organic connectors for the fabrication of advanced adsorbents due to their unique properties. In this study, the bionanocomposite ...
DOI:
10.1016/j.ijbiomac.2020.11.062

26. Fundamental Linkage Between Structure, Electrochemical Properties, and Chemical Compositions of LiNi₁–ₓ–yMnₓCoyO₂ Cathode Materials

Author:
Jiangtao Hu; Qinchao Wang; Bingbin Wu; Sha Tan; Zulipiya Shadike; Yujing Bi; M. Stanley Whittingham; Jie Xiao; Xiao-Qing Yang; Enyuan Hu
Source:
ACS applied materials & interfaces 2021 v.13 no.2 pp. 2622-2629
ISSN:
1944-8252
Subject:
X-ray absorption spectroscopy; X-ray diffraction; cathodes; cations; electrochemistry; oxygen; surveys
Abstract:
... LiNi₁–ₓ–yMnₓCoyO₂ (NMC) is an important class of high-energy-density cathode materials. The possibility of changing both x and y in the chemical formula provides numerous materials with diverse electrochemical and structural properties. It is highly desirable to have guidance on correlating NMC structural and electrochemical properties with their chemical composition for material designing and scr ...
DOI:
10.1021/acsami.0c18942

27. Novel (110) Double-Layered Guanidinium-Lead Iodide Perovskite Material: Crystal Structure, Electronic Structure, and Broad Luminescence

Author:
Thuat Nguyen-Tran; Van An Dinh; Nam Van Ly; Huu Duc Luong; Dung Thi Pham; Tu Thanh Truong; Hung Quoc Nguyen; Quang-Duy Dao; Chi Thi Kim Tran; Hien Thi Thu Bui; Duyen Thi Nguyen; My Nguyen Ha Dang; Van Vu Thi Phan; Quang Duc Truong
Source:
Journal of physical chemistry 2021 v.125 no.1 pp. 964-972
ISSN:
1932-7455
Subject:
X-ray diffraction; absorption; cations; crystal structure; density functional theory; films (materials); guanidinium; iodides; lead; momentum; photoluminescence
Abstract:
... In this work, a new crystalline structure of two-dimensional (2D) Ruddlesden–Popper guanidinium lead iodide [C(NH₂)₃]₂PbI₄ with a particular organic cation orientation is proposed. Density functional theory calculations indicate that this structure of [C(NH₂)₃]₂PbI₄ is more energetically stable than the reported structure belonging to the Pmna space group. The crystalline and electronic structures ...
DOI:
10.1021/acs.jpcc.0c08540

28. Discrete Open-Shell Tris(bipyridinium radical cationic) Inclusion Complexes in the Solid State

Author:
Ommid Anamimoghadam; Leighton O. Jones; James A. Cooper; Yassine Beldjoudi; Minh T. Nguyen; Wenqi Liu; Matthew D. Krzyaniak; Cristian Pezzato; Charlotte L. Stern; Hasmukh A. Patel; Michael R. Wasielewski; George C. Schatz; J. Fraser Stoddart
Source:
Journal of the American Chemical Society 2020 v.143 no.1 pp. 163-175
ISSN:
1520-5126
Subject:
X-ray diffraction; ambient temperature; cations; energy; ferrimagnetic materials; magnetism; nutation; paraquat; titration
Abstract:
... The solid-state properties of organic radicals depend on radical–radical interactions that are influenced by the superstructure of the crystalline phase. Here, we report the synthesis and characterization of a substituted tetracationic cyclophane, cyclobis(paraquat-p-1,4-dimethoxyphenylene), which associates in its bisradical dicationic redox state with the methyl viologen radical cation (MV•⁺) to ...
DOI:
10.1021/jacs.0c07148

29. Synthesis of the inorganic-organic hybrid of two-dimensional polydopamine-functionalized titanate nanosheets and its efficient extraction of U(VI) from aqueous solution

Author:
Yuzhi Zhou; Ye Li; Dongxue Liu; Xiaoli Wang; Dongbin Liu; Lidong Xu
Source:
Colloids and surfaces 2020 v.607 pp. 125422
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; calcium; cation exchange; cations; heat production; magnesium; models; nanosheets; pH; polymerization; potassium; protons; radioactive waste; sodium; sorption isotherms
Abstract:
... The novel functional composites of two-dimensional polydopamine@titanate nanosheets (PDA@TNSs) with the increased affinity and capacity were successfully synthesized by non-covalent self-assembly and covalent oxidative polymerization. The batch experiments were employed to systematically investigate the U(VI) adsorption performance of PDA@TNSs. Compared with TNSs, PDA@TNSs represented excellent ad ...
DOI:
10.1016/j.colsurfa.2020.125422

30. A novel free-standing polyvinyl butyral-polyacrylonitrile/ZnAl-layered double hydroxide nanocomposite membrane for enhanced heavy metal removal from wastewater

Author:
Hajar Azad; Mohsen Mohsennia
Source:
Journal of membrane science 2020 v.615 pp. 118487
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; aluminum; aqueous solutions; artificial membranes; atomic force microscopy; cadmium; calcium chloride; calcium sulfate; cations; contact angle; energy-dispersive X-ray analysis; heavy metals; hydrophilicity; lead; nanocomposites; nanosheets; pH; porosity; roughness; scanning electron microscopy; sodium chloride; sodium sulfate; strength (mechanics); wastewater; zinc
Abstract:
... A novel free-standing polyvinyl butyral-polyacrylonitrile/ZnAl-layered double hydroxide nanocomposite membrane (PVB-PAN/ZnAl-LDH NCM) was prepared through a phase inversion method and employed for salts and heavy metals removal from their aqueous solutions. The structural and physicochemical characteristics of the prepared substances were investigated by XRD, FT-IR, FE-SEM, EDX, AFM, and water con ...
DOI:
10.1016/j.memsci.2020.118487

31. Lithium recovery from salt-lake brine: Impact of competing cations, pretreatment and preconcentration

Author:
Biplob Kumar Pramanik; Muhammad Bilal Asif; Rajeev Roychand; Li Shu; Veeriah Jegatheesan; Muhammed Bhuiyan; Faisal Ibney Hai
Source:
Chemosphere 2020 v.260 pp. 127623
ISSN:
0045-6535
Subject:
X-ray diffraction; brine solutions; calcium; carbonates; cations; crystals; developed countries; distillation; lithium; manufacturing; mass; metal ions; nanofiltration; permeability; pretreatment; separation; supply
Abstract:
... The global demand of lithium is rising steadily, and many industrially advanced countries may find it hard to secure an uninterrupted supply of lithium for meeting their manufacturing demands. Thus, innovative processes for lithium recovery from a wide range of natural reserves should be explored for meeting the future demands. In this study, a novel integrated approach was investigated by combini ...
DOI:
10.1016/j.chemosphere.2020.127623

32. Proteic sol–gel synthesis of Gd-doped ceria: a comprehensive structural, chemical, microstructural and electrical analysis

Author:
Allan J. M. Araújo; João P. F. Grilo; Francisco J. A. Loureiro; Laura I. V. Holz; Daniel A. Macedo; Duncan P. Fagg; Carlos A. Paskocimas
Source:
Journal of materials science 2020 v.55 no.36 pp. 16864-16878
ISSN:
0022-2461
Subject:
X-radiation; X-ray diffraction; cations; ceramics; dielectric spectroscopy; electrochemistry; enthalpy; gelatin; temperature; thermogravimetry
Abstract:
... Gd-doped ceria (Ce₁₋ₓGdₓO₂₋δ; x = 0, 0.1 and 0.2) is one of the best ceramic electrolytes for application in solid oxide electrochemical devices. This work reports an innovative and environmentally friendly route known as “proteic sol–gel synthesis” using gelatin for their preparation. Materials are characterized via thermogravimetric analysis, X-ray diffractometry, scanning electron microscopy, R ...
DOI:
10.1007/s10853-020-05173-6

33. Ternary plumbides ATPb₂ (A = Ca, Sr, Ba, Eu; T = Rh, Pd, Pt) with distorted, lonsdaleite-related substructures of tetrahedrally connected lead atoms

Author:
Steffen Klenner; Judith Bönnighausen; Rainer Pöttgen
Source:
Zeitschrift für Naturforschung 2020 v.75 no.11 pp. 903-911
ISSN:
1865-7117
Subject:
X-ray diffraction; anisotropy; cations; crystallization; europium; furnaces; lead; magnetic susceptibility; paramagnetism; tantalum; temperature
Abstract:
... The plumbides CaTPb₂ (T = Rh, Pd), EuTPb₂ (T = Rh, Pd, Pt), SrTPb₂ (T = Rh, Pd, Pt) and BaTPb₂ (T = Pd, Pt) were obtained by direct reactions of the elements in sealed tantalum tubes in an induction furnace. The moisture sensitive polycrystalline samples were characterized by X-ray powder diffraction. They crystallize with the orthorhombic MgCuAl₂-type structure, space group Cmcm. The structures o ...
DOI:
10.1515/znb-2020-0046

34. Pressure-Induced Phase Transitions in Danburite-Type Borosilicates

Author:
Liudmila A. Gorelova; Anna S. Pakhomova; Maria G. Krzhizhanovskaya; B. Winkler; Sergey V. Krivovichev; Leonid S. Dubrovinsky
Source:
Journal of physical chemistry 2020 v.124 no.47 pp. 26048-26061
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-ray diffraction; cations; density functional theory; phase transition; silicon
Abstract:
... The high-pressure behaviors of two isotypic borosilicates (maleevite, BaB₂Si₂O₈, and pekovite, SrB₂Si₂O₈) have been studied using in situ single-crystal X-ray diffraction and Raman spectroscopy. Maleevite undergoes one reconstructive phase transition between 36 and 38 GPa with the formation of a triclinic phase, maleevite-II, featuring octahedrally coordinated silicon. In contrast, pekovite underg ...
DOI:
10.1021/acs.jpcc.0c08616

35. Structure and Properties of Cs₇(H₄PO₄)(H₂PO₄)₈: A New Superprotonic Solid Acid Featuring the Unusual Polycation (H₄PO₄)⁺

Author:
Louis S. Wang; Sawankumar V. Patel; Sheel S. Sanghvi; Yan-Yan Hu; Sossina M. Haile
Source:
Journal of the American Chemical Society 2020 v.142 no.47 pp. 19992-20001
ISSN:
1520-5126
Subject:
X-ray diffraction; anions; cations; humidification; moieties; nuclear magnetic resonance spectroscopy; temperature; thermodynamics
Abstract:
... We report the discovery of a new superprotonic compound, Cs₇(H₄PO₄)(H₂PO₄)₈, or CPP, which forms at elevated temperatures from the reaction of CsH₂PO₄ and CsH₅(PO₄)₂. The structure, solved using high-temperature single-crystal X-ray diffraction and confirmed by high-temperature ³¹P NMR spectroscopy, crystallizes in space group Pm3̅n and has a lattice constant of 20.1994(9) Å at 130 °C. The unit ce ...
DOI:
10.1021/jacs.0c08870

36. Caffeine Adsorption on Natural and Synthetic Smectite Clays: Adsorption Mechanism and Effect of Interlayer Cation Valence

Author:
Hiroshi Sakuma; Kenji Tamura; Kenjiro Hashi; Masumi Kamon
Source:
Journal of physical chemistry 2020 v.124 no.46 pp. 25369-25381
ISSN:
1932-7455
Subject:
X-ray diffraction; adsorbents; adsorption; aluminum; aqueous solutions; caffeine; cations; clay; decaffeination; magnetism; models; molecular dynamics; montmorillonite; smectite; sodium; sorption isotherms
Abstract:
... There is currently significant interest in adsorbents for selective removal of caffeine from water. Here, we examined caffeine adsorption in a natural montmorillonite (Mnt) smectite clay mineral. A simple exchange of the original monovalent sodium interlayer cations with polyvalent aluminum cations increased the caffeine adsorption rate of the smectite by approximately 1.6 times (maximum adsorptio ...
DOI:
10.1021/acs.jpcc.0c07834

37. Effects of Al-dopant at Ni or Co sites in LiNi₀.₆Co₀.₃Ti₀.₁O₂ on interlayer slabs (Li–O) and intralayer slabs (TM–O) and their influence on the electrochemical performance of cathode materials

Author:
Wan Aida Hazwani Wan Azizan; Muhd Firdaus Kasim; Kelimah Elong; Roshidah Rusdi; Rizuan Mohd Rosnan; Norlida Kamarulzaman
Source:
RSC advances 2020 v.10 no.66 pp. 40291-40299
ISSN:
2046-2069
Subject:
X-ray diffraction; cathodes; cations; chemical structure; combustion; commercialization; crystallites; electrochemistry; energy; energy density; markets
Abstract:
... In order to satisfy the energy demands of the electromobility market, further improvements in cathode materials are receiving much attention, especially high energy density cathode materials for Li-ion batteries (LIBs). In this work, the self-propagating combustion (SPC) method is use to synthesise undoped LiNi₀.₆Co₀.₃Ti₀.₁O₂ (LNCT), novel nano-sized Al-doped LiNi₀.₆Co₀.₃₋ₓAlₓTi₀.₁O₂ (LCA) and LiN ...
DOI:
10.1039/d0ra07434a

38. Alternative Organic Spacers for More Efficient Perovskite Solar Cells Containing Ruddlesden–Popper Phases

Author:
Jun Xi; Ioannis Spanopoulos; Kijoon Bang; Jie Xu; Hua Dong; Yingguo Yang; Christos D. Malliakas; Justin M. Hoffman; Mercouri G. Kanatzidis; Zhaoxin Wu
Source:
Journal of the American Chemical Society 2020 v.142 no.46 pp. 19705-19714
ISSN:
1520-5126
Subject:
X-ray diffraction; cages; cations; encapsulation; humidity; hydrogen; solar energy
Abstract:
... The halide perovskite Ruddlesden–Popper (RP) phases are a homologous layered subclass of solution-processable semiconductors that have aroused great attention, especially for developing long-term solar photovoltaics. They are defined as (A′)₂(A)ₙ₋₁PbₙX₃ₙ₊₁ (A′ = spacer cation, A = cage cation, and X = halide anion). The orientation control of low-temperature self-assembled thin films is a fundamen ...
DOI:
10.1021/jacs.0c09647

39. The Impact of Thermal History on Water Adsorption in a Synthetic Nanolayered Silicate with Intercalated Li⁺ or Na⁺

Author:
L. Michels; C. L. S. da Fonseca; Y. Méheust; M. A. S. Altoé; E. C. dos Santos; G. Grassi; R. Droppa; K. D. Knudsen; L. P. Cavalcanti; K. W. B. Hunvik; J. O. Fossum; G. J. da Silva; H. N. Bordallo
Source:
Journal of physical chemistry 2020 v.124 no.45 pp. 24690-24703
ISSN:
1932-7455
Subject:
X-ray diffraction; adsorption; cations; clay; hysteresis; relative humidity; silicates; temperature; thermogravimetry; water content
Abstract:
... For applications benefitting from the swelling properties of nanolayered silicates (clay minerals), it is of paramount importance to understand the hysteresis in the clay–water interaction. In this context, the present work investigates how the thermal history of Na⁺- and Li⁺-intercalated fluorohectorite affects the hydration process. By combining X-ray diffraction and thermogravimetric analysis, ...
DOI:
10.1021/acs.jpcc.0c05847

40. Investigating the effect of solvent vapours on crystallinity, phase, and optical, morphological and structural properties of organolead halide perovskite films

Author:
Sagar A. More; Rajendra G. Halor; Raees Shaikh; Gauri G. Bisen; Hemant S. Tarkas; Swapnil R. Tak; Bharat R. Bade; Sandesh R. Jadkar; Jaydeep V. Sali; Sanjay S. Ghosh
Source:
RSC advances 2020 v.10 no.66 pp. 39995-40004
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; absorption; acetone; annealing; boiling point; cations; chlorobenzene; crystal structure; dielectric properties; isopropyl alcohol; moieties; solvents; toluene; water; water vapor
Abstract:
... A comprehensive study regarding the effect of different solvent vapours on organolead halide perovskite properties is lacking. In the present work, the impact of exposing CH₃NH₃PbI₃ films to the vapours of commonly available solvents has been studied. The interaction with perovskite has been correlated to solvent properties like dielectric constant, molecular dipole moment, Gutmann donor number an ...
DOI:
10.1039/d0ra07926j

41. Microencapsulation of copigmented anthocyanins using double emulsion followed by complex coacervation: Preparation, characterization and stability

Author:
Nattapong Kanha; Suthat Surawang; Pornsiri Pitchakarn; Thunnop Laokuldilok
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2020 v.133 pp. 110154
ISSN:
0023-6438
Subject:
Fourier transform infrared spectroscopy; Gibbs free energy; X-ray diffraction; activation energy; anthocyanins; black rice; cations; emulsifiers; emulsions; endothermy; enthalpy; entropy; freeze drying; half life; heat tolerance; hydrophilicity; microencapsulation; temperature
Abstract:
... This work focused on anthocyanin-rich black rice extract (ATC) and copigmented anthocyanins (ATC-CTC) microencapsulation using double emulsion and complex coacervation with different hydrophilic emulsifiers (gelatin-acacia gum: GE-AG, chitosan-carboxymethyl cellulose: CS-CMC). Four freeze-dried microcapsule types (GE-AG/ATC, GE-AG/ATC-CTC, CS-CMC/ATC, and CS-CMC/ATC-CTC) were prepared. Morphology, ...
DOI:
10.1016/j.lwt.2020.110154

42. Two-dimensional iron MOF nanosheet as a highly efficient nanozyme for glucose biosensing

Author:
Ai Yuan; Yuwan Lu; Xiaodan Zhang; Qiumeng Chen; Yuming Huang
Source:
Journal of materials chemistry B 2020 v.8 no.40 pp. 9295-9303
ISSN:
2050-7518
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; atomic force microscopy; catalysts; catalytic activity; cations; colorimetry; detection limit; glucose; hydrogen peroxide; iron; ligands; nanosheets; oxidation; peroxidase
Abstract:
... Two-dimensional (2D) nanomaterials are attractive in catalysis due to their rich accessible active sites. Iron-based metal organic frameworks (MOFs) are promising nanozymes because of their iron center and pore structure. However, it is challenging to obtain iron-based 2D MOF nanozymes due to the coordinated form of iron. Herein, we report a cation substitution strategy to transform an easily obta ...
DOI:
10.1039/d0tb01598a

43. Removal of phosphate from aqueous solution by ferrihydrite/bagasse composite prepared through in situ precipitation method

Author:
Ru-yi Zhou; Jun-xia Yu; Hong-xia Li; Ru-an Chi
Source:
Colloids and surfaces 2020 v.603 pp. 125144
ISSN:
0927-7757
Subject:
X-ray diffraction; adsorbents; adsorption; anions; aqueous solutions; bagasse; calcium; cations; chlorides; electrostatic interactions; energy-dispersive X-ray analysis; ferrihydrite; isoelectric point; magnesium; nitrates; pH; phosphates; potassium; scanning electron microscopy; sodium; sorption isotherms; sulfates; transmission electron microscopy; wastewater; wastewater treatment; zeta potential
Abstract:
... Ferrihydrite/bagasse composite adsorbent (FH/SCB) was prepared by in situ precipitation method to remove phosphate from aqueous solution. Effects of precipitation pH on adsorption performances of the composites were investigated and adsorption performances and mechanism of phosphate on the composite prepared at the optimum pH for phosphate were studied. Results showed that precipitation pH played ...
DOI:
10.1016/j.colsurfa.2020.125144

44. Lanthanide contraction effect and white-emitting luminescence in a series of metal–organic frameworks based on 2,5-pyrazinedicarboxylic acid

Author:
Marina O. Barsukova; Sofia V. Cherezova; Aleksandr A. Sapianik; Olga V. Lundovskaya; Denis G. Samsonenko; Vladimir P. Fedin
Source:
RSC advances 2020 v.10 no.63 pp. 38252-38259
ISSN:
2046-2069
Subject:
X-ray diffraction; cations; color; crystallography; gadolinium; lanthanum; luminescence; terbium; yttrium
Abstract:
... A series of lanthanide and yttrium MOFs of two structural types [M₂(H₂O)₂(nmp)₂(pzc)₃] (1M) and [M₂(H₂O)₄(pzc)₃]·NMP·5H₂O (2M) (where M – lanthanide or yttrium cation, nmp – N-methyl-2-pyrrolidone, pzc²⁻ – 2,5-pyrazinedicarboxylate) was synthesized and characterized by single crystal and powder X-ray diffraction crystallography, TG, elemental analyses and IR-spectroscopy. The effect of lanthanide ...
DOI:
10.1039/d0ra08485a

45. Effects of Post-deposition Annealing on Epitaxial CoO/Fe₃O₄ Bilayers on SrTiO₃(001) and Formation of Thin High-Quality Cobalt Ferrite-like Films

Author:
Jannis Thien; Jascha Bahlmann; Andreas Alexander; Martin Hoppe; Tobias Pohlmann; Kevin Ruwisch; Carola Meyer; Florian Bertram; Karsten Küpper; Joachim Wollschläger
Source:
Journal of physical chemistry 2020 v.124 no.43 pp. 23895-23904
ISSN:
1932-7455
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; X-ray reflectivity; cations; cobalt; crystallization; ferrimagnetic materials; stoichiometry
Abstract:
... In order to explore an alternative pathway to prepare ultrathin CoFe₂O₄ films, epitaxial CoO/Fe₃O₄ bilayers with varying film thickness of the CoO film were grown on Nb-doped SrTiO₃(001) substrates via reactive molecular beam epitaxy. Thereafter, cobalt ferrite films with varying stoichiometry were prepared by post-deposition annealing at different temperatures. The thermally mediated interdiffusi ...
DOI:
10.1021/acs.jpcc.0c05503

46. The influence of ruthenium substitution in LaCoO₃ towards bi-functional electrocatalytic activity for rechargeable Zn–air batteries

Author:
Shivaraju Guddehalli Chandrappa; Prabu Moni; Dehong Chen; Guruprakash Karkera; Kunkanadu R. Prakasha; Rachel A. Caruso; Annigere S. Prakash
Source:
Journal of materials chemistry A 2020 v.8 no.39 pp. 20612-20620
ISSN:
2050-7496
Subject:
X-ray diffraction; batteries; catalysts; cathodes; cations; crystal structure; electric potential difference; electrochemistry; lanthanum; oxygen; oxygen production; ruthenium; spectroscopy; sustainable technology
Abstract:
... The rechargeable zinc–air battery is a clean technology for energy storage applications but is impeded by the slow kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) during its cycling. Herein, a series of lanthanum cobaltate based perovskites are synthesised with the B-site cation deficiencies in the structure occupied by Ru substitution: LaCo₁₋ₓRuₓO₃₋δ (x = 0, 0. ...
DOI:
10.1039/d0ta06673g

47. Functionalized geopolymer foams for cesium removal from liquid nuclear waste

Author:
S. Petlitckaia; Y. Barré; T. Piallat; O. Grauby; D. Ferry; A. Poulesquen
Source:
Journal of cleaner production 2020 v.269 pp. 122400
ISSN:
0959-6526
Subject:
X-ray diffraction; cations; cesium radioisotopes; comparative study; decontamination; foams; freshwater; ion exchange; liquid wastes; liquids; polymers; porous media; potassium; radioactive waste; scanning electron microscopy; sodium; sorption isotherms; transmission electron microscopy
Abstract:
... Geopolymer foam hosting a 3D network of interconnected pores was synthetized and functionalized with a potassium copper hexacyanoferrate [K₂CuFe(CN)₆] in order to decontaminate radioactive liquid waste containing cesium. The Geopolymer Foam (GF) and Functionalized Geopolymer Foams (FGF) were characterized using a panel of characterization techniques (SEM, TEM, XRD …) before studying their capacity ...
DOI:
10.1016/j.jclepro.2020.122400

48. Untersuchungen zur Polymorphie der Cäsium-Dodekahalogeno-closo-Dodekaborate Cs₂[B₁₂X₁₂] (X = Cl–I)

Author:
Ioannis Tiritiris; Kevin U. Bareiß; Thomas Schleid
Source:
Zeitschrift für Naturforschung 2020 v.75 no.8 pp. 777-790
ISSN:
1865-7117
Subject:
X-ray diffraction; ambient temperature; bromination; cations; cesium; crystal structure; crystallization; heat; occupations
Abstract:
... Thermoanalytic DSC and temperature-dependent X-ray diffraction investigations on the cesium dodecahalogeno-closo-dodecaborates Cs₂[B₁₂X₁₂] (X = Cl–I) have revealed solid-solid phase transitions from their trigonal room-temperature α-forms (e.g. α-Cs₂[B₁₂Cl₁₂]: a = 959.67(3) pm, c = 4564.2(2) pm, Z = 6, space group R3¯$\overline{3}$) into cubic high-temperature modifications. The isotypic title com ...
DOI:
10.1515/znb-2020-0096

49. Incorporated Guanidinium Expands the CH₃NH₃PbI₃ Lattice and Enhances Photovoltaic Performance

Author:
Lili Gao; Xiaotong Li; Yan Liu; Junjie Fang; Sheng Huang; Ioannis Spanopoulos; Xiaolei Li; Yao Wang; Lin Chen; Guanjun Yang; Mercouri G. Kanatzidis
Source:
ACS applied materials & interfaces 2020 v.12 no.39 pp. 43885-43891
ISSN:
1944-8252
Subject:
X-ray diffraction; air; cations; guanidinium; iodides; lead; nuclear magnetic resonance spectroscopy; solar cells
Abstract:
... Guanidinium (GA) has been widely used as an additive in solar cells for enhanced performance. However, the size of the guanidinium cation is too large to be incorporated in the cage of the perovskite structure. Instead, GA forms a variety of structures with lead iodide, where its role in the perovskite crystal as well as solar cell devices is unclear. In this study, we demonstrate that GA can be i ...
DOI:
10.1021/acsami.0c14925

50. Helically shaped cation receptor: design, synthesis, characterisation and first application to ion transport

Author:
Hamza Boufroura; Romain Plais; Salomé Poyer; Anne Gaucher; Jérome Marrot; Gilles Clavier; François-Xavier Legrand; Cécile Huin; Philippe Guégan; Damien Prim; Jean-Yves Salpin
Source:
RSC advances 2020 v.10 no.52 pp. 31670-31679
ISSN:
2046-2069
Subject:
X-ray diffraction; cations; design; electrophysiology; hydrophilicity; hydrophobicity; ion transport; lipids; models; oxygen; sulfur; synthesis
Abstract:
... The methyl ester of 8-oxo-8H-indeno[2′,1′:7,8]naphtho[1,2-b]thiophene-2-carboxylic acid (1) and its corresponding PEGylated ester were synthesised and fully characterised. X-ray diffraction studies on (1) confirmed the helical structure of the receptor and that it is self-assembled into layers by π–π interactions. An in-depth study by DFT calculations and MS experiments (ESI-MS, MS/MS, IMRPD and E ...
DOI:
10.1039/d0ra05519k

51. Interaction of the Cation and Vacancy in Hybrid Perovskites Induced by Light Illumination

Author:
Linyang Lu; Kong-Chao Shen; Jingkun Wang; Zhenhuang Su; Yanqing Li; Li Chen; Yuxin Luo; Fei Song; Xingyu Gao; Jian-Xin Tang
Source:
ACS applied materials & interfaces 2020 v.12 no.37 pp. 42369-42377
ISSN:
1944-8252
Subject:
X-ray diffraction; cations; dissociation; energy; lighting; photolysis; separation; solar cells; spectroscopy; ultraviolet radiation
Abstract:
... Mixed A-site engineering is an emerging strategy to overcome the difficulties in realizing high-quality perovskite films together with high ambient stability. Particularly, the α-FACsPbI₃-based hybrid perovskites have been considered as a promising candidate for solar cell applications. However, the degradation mechanism of α-FACsPbI₃ hybrid perovskites induced by light illumination remains unclea ...
DOI:
10.1021/acsami.0c11696

52. Condensed Phenoxazine Dimer and Its Radical Cation

Author:
Takayuki Miyamae; Makoto Haraguchi; Yoshimitsu Tachi; Shuichi Suzuki; Masatoshi Kozaki; Keiji Okada
Source:
Organic letters 2020 v.22 no.17 pp. 6790-6793
ISSN:
1523-7052
Subject:
X-ray diffraction; cations; nitrogen; oxidants; oxidation
Abstract:
... A condensed phenoxazine dimer was synthesized and characterized. X-ray crystallographic analysis of the dimer shows a double-butterfly structure, in which the nitrogen atoms are located above and below the molecular plane. A radical cation salt of the dimer was obtained using tris(4-bromophenyl)aminium hexafluoroantimonate as the oxidant. The salt is air-stable in solid and solution states. The ca ...
DOI:
10.1021/acs.orglett.0c02305

53. Negatively Curved Nanographene with Heptagonal and [5]Helicene Units

Author:
Zijie Qiu; Sobi Asako; Yunbin Hu; Cheng-Wei Ju; Thomas Liu; Loïc Rondin; Dieter Schollmeyer; Jean-Sébastien Lauret; Klaus Müllen; Akimitsu Narita
Source:
Journal of the American Chemical Society 2020 v.142 no.35 pp. 14814-14819
ISSN:
1520-5126
Subject:
X-ray diffraction; cations; circular dichroism spectroscopy; color; enantiomers; helicenes; high performance liquid chromatography
Abstract:
... Negatively curved nanographene (NG) 4, having two heptagons and a [5]helicene, was unexpectedly obtained by aryl rearrangement and stepwise cyclodehydrogenations. X-ray crystallography confirmed the saddle-shaped structures of intermediate 3 and NG 4. The favorability of rearrangement over helicene formation following radical cation or arenium cation mechanisms is supported by theoretical calculat ...
DOI:
10.1021/jacs.0c05504

54. The relationship between oxide-ion conductivity and cation vacancy order in the hybrid hexagonal perovskite Ba₃VWO₈.₅

Author:
Asma Gilane; Sacha Fop; Falak Sher; Ronald I. Smith; Abbie C. Mclaughlin
Source:
Journal of materials chemistry A 2020 v.8 no.32 pp. 16506-16514
ISSN:
2050-7496
Subject:
X-radiation; X-ray diffraction; cations; crystal structure; diffusivity; electrical properties; energy; molybdenum; neutron diffraction; oxygen; topology
Abstract:
... Significant oxide ionic conductivity has recently been reported in cation-deficient hexagonal perovskite Ba₃M′M′′O₈.₅ derivatives (M′ = Nb; M′′ = Mo, W), with disordered hybrid 9R-palmierite average structures. Here, we present a study of the crystal structure and electrical properties of the related compound Ba₃VWO₈.₅. Electrical characterization demonstrates that Ba₃VWO₈.₅ is also an oxide ion c ...
DOI:
10.1039/d0ta05581f

55. Synthesis and Mechanism of High Structural Stability of Nickel-Rich Cathode Materials by Adjusting Li-Excess

Author:
Zhenlu Yu; Xingyu Qu; Tao Wan; Aichun Dou; Yu Zhou; Xiaoqi Peng; Mingru Su; Yunjian Liu; Dewei Chu
Source:
ACS applied materials & interfaces 2020 v.12 no.36 pp. 40393-40403
ISSN:
1944-8252
Subject:
X-ray diffraction; cathodes; cations; electric potential difference; transmission electron microscopy
Abstract:
... It has been a long-term challenge to improve the phase stability of Ni-rich LiNiₓMnyCo₁–ₓ–yO₂ (x ≥ 0.6) transition metal (TM) oxides for large-scale applications. Herein, a new structure engineering strategy is utilized to optimize the structural arrangement of Li₁₊ₓ(Ni₀.₈₈Mn₀.₀₆Co₀.₀₆)₁–ₓO₂ (NMC88) with a different Li-excess content. It was found that structure stability and particle sizes can be ...
DOI:
10.1021/acsami.0c12541

56. Prospects for defect engineering in Cu₂ZnSnS₄ solar absorber films

Author:
Katharina Rudisch; Alexandra Davydova; Lars Riekehr; Joakim Adolfsson; Luciano Quaglia Casal; Charlotte Platzer-Björkman; Jonathan Scragg
Source:
Journal of materials chemistry A 2020 v.8 no.31 pp. 15864-15874
ISSN:
2050-7496
Subject:
Raman spectroscopy; X-ray diffraction; annealing; cations; chemistry; copper zinc tin sulfide; engineering; films (materials); photoluminescence; solar cells
Abstract:
... Complex compound semiconductors, such as the emerging solar cell material Cu₂ZnSn(S,Se)₄ (CZTS), present major experimental challenges in terms of understanding and controlling growth processes and defect formation. This study aims to shed light upon the complicated interplay of the synthesis conditions and CZTS thin film properties. Composition-spread thin films are fabricated in different atmosp ...
DOI:
10.1039/d0ta02598d

57. Assessment of in vitro cytotoxicity of imidazole ionic liquids and inclusion in targeted drug carriers containing violacein

Author:
Ignacio Rivero Berti; Boris Rodenak-Kladniew; Celeste Onaindia; Claudia G. Adam; German A. Islan; Nelson Durán; Guillermo R. Castro
Source:
RSC advances 2020 v.10 no.49 pp. 29336-29346
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acetates; antiparasitic agents; carbon; cations; cell viability; cytotoxicity; fluorescence; folate receptors; folic acid; human cell lines; humans; imidazole; lipids; lung neoplasms; toxicology; violacein
Abstract:
... Violacein (Viol) is a pigment produced by several Gram-negative bacteria with many bioactivities, such as anticancer, virucide, and antiparasitic. However, violacein is insoluble under physiological conditions preventing its potential therapeutic uses. Surface-active ionic liquids (SAILs) based on the cation 1-alkylimidazolium ([CₙHim]) with n = 10 to 16 alkyl carbon side chain lengths and acetate ...
DOI:
10.1039/d0ra05101b

58. Critical Raw Material-Free Catalysts and Electrocatalysts: Complementary Strategies to Activate Economic, Robust, and Ecofriendly SrTiO₃

Author:
Giovanni Carollo; Alberto Garbujo; Fabrice Mauvy; Antonella Glisenti
Source:
Energy & fuels 2020 v.34 no.9 pp. 11438-11448
ISSN:
1520-5029
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; anodes; barium; biogas; cations; desorption; durability; energy; energy-dispersive X-ray analysis; fuel cells; methane; molybdenum; nickel; oxidation
Abstract:
... In this contribution, new SrTiO₃-based materials have been developed and their catalytic and electrocatalytic properties have been tuned by cation insertion, nanocomposition, and infiltration. The aim is to develop highly functional materials within a critical raw material-free approach with a particular aim toward durability and stability [under operating conditions of solid oxide fuel cell (SOFC ...
DOI:
10.1021/acs.energyfuels.0c01678

59. Novel betaine-amino acid based natural deep eutectic solvents for enhancing the enzymatic hydrolysis of corncob

Author:
Yuan Liang; Wenjing Duan; Xiaoxi An; Yingyun Qiao; Yuanyu Tian; Haifeng Zhou
Source:
Bioresource technology 2020 v.310 pp. 123389
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; amino acids; anions; betaine; biomass; cations; cellulose; corn cobs; digestibility; enzymatic hydrolysis; lignin; nuclear magnetic resonance spectroscopy; solubility; solvents; water content; xylan
Abstract:
... A novel natural deep eutectic solvent (NDES) with water content ranging from 65 to 93 wt%, in which betaine (Bet) acts as the cation and amino acids (AAs) as the anions, was prepared by a simple and green chemical route. [Bet][AA] NDES showed excellent xylan and lignin solubility, however, scare cellulose solubility. A mild and facile pretreatment process with [Bet][AA] NDES was carried out at 60  ...
DOI:
10.1016/j.biortech.2020.123389

60. Surface analysis by GXRD and XPS in the austenitic steel DIN by nickel ions

Author:
L. Castañeda
Source:
Heliyon 2020 v.6 no.8 pp. e04665
ISSN:
2405-8440
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; cations; chromium; gallium; irradiation; manganese; molybdenum; nickel; niobium; stainless steel
Abstract:
... The composition changes in the close to surface of the austenitic stainless steel DIN 1.4981 irradiated at high doses. Theoretical simulations using the SRIM-2013 program show that the damage due to Nickel cation [Ni²⁺] ions irradiation of 3.66 MeV extends to up 2 μm deep in the steel under study. Then the applications of Grazing incidence X-ray Diffraction (GXRD) and X-ray Photoelectron Spectrosc ...
DOI:
10.1016/j.heliyon.2020.e04665

61. Thermodynamic, kinetic and equilibrium isotherm studies of As(V) adsorption by Fe(III)-impregnated bentonite

Author:
Shima Barakan; Valeh Aghazadeh; Abdoullah Samiee Beyragh; Sahar Mohammadi
Source:
Environment, development and sustainability 2020 v.22 no.6 pp. 5273-5295
ISSN:
1387-585X
Subject:
X-ray diffraction; active sites; adsorbents; adsorption; ambient temperature; aqueous solutions; arsenic; behavior; bentonite; carcinogenicity; cations; clay; endothermy; equations; ligands; models; pH; particles; research; sorption isotherms; thermodynamics; ultraviolet-visible spectroscopy
Abstract:
... Arsenic removal has received much attention all over the world because of its toxicity and carcinogenicity. In the current research, the adsorption behavior of As(V) from aqueous solution onto Fe(III)-impregnated bentonite (Fe-Bent) was examined. Adsorption experiment results showed that the adsorption capacity of initial bentonite clay (Bent) was increased by Fe(III)-impregnation method. In Fe-Be ...
DOI:
10.1007/s10668-019-00424-2

62. Structural, mechanical, dielectric properties and magnetic interactions in Dy³⁺-substituted Co–Cu–Zn nanoferrites

Author:
R. H. Kadam; R. B. Borade; M. L. Mane; D. R. Mane; K. M. Batoo; Sagar E. Shirsath
Source:
RSC advances 2020 v.10 no.47 pp. 27911-27922
ISSN:
2046-2069
Subject:
Poisson distribution; X-ray diffraction; cations; crystallites; dielectric properties; equations; ferrimagnetic materials; magnetism; modulus of elasticity; temperature; transmission electron microscopy
Abstract:
... Sol–gel-synthesized Co–Cu–Zn ferrite nanoparticles diluted with Dy³⁺ ions were investigated in terms of their structural, morphological, elastic, magnetic and dielectric properties. X-ray diffraction patterns showed the formation of a single-phase cubic spinel structure. As the concentration of Dy³⁺ ions was increased, the lattice length gradually increased from 8.340 to 8.545 Å, obeying Vegard's ...
DOI:
10.1039/d0ra05274d

63. Structural and Dynamical Properties of Potassium Dodecahydro-monocarba-closo-dodecaborate: KCB₁₁H₁₂

Author:
Mirjana Dimitrievska; Hui Wu; Vitalie Stavila; Olga A. Babanova; Roman V. Skoryunov; Alexei V. Soloninin; Wei Zhou; Benjamin A. Trump; Mikael S. Andersson; Alexander V. Skripov; Terrence J. Udovic
Source:
Journal of physical chemistry 2020 v.124 no.33 pp. 17992-18002
ISSN:
1932-7455
Subject:
X-ray diffraction; cations; neutrons; nuclear magnetic resonance spectroscopy; physical chemistry; potassium; temperature
Abstract:
... MCB₁₁H₁₂ (M: Li, Na) dodecahydro-monocarba-closo-dodecaborate salt compounds are known to have stellar superionic Li⁺ and Na⁺ conductivities in their high-temperature disordered phases, making them potentially appealing electrolytes in all-solid-state batteries. Nonetheless, it is of keen interest to search for other related materials with similar conductivities while at the same time exhibiting e ...
DOI:
10.1021/acs.jpcc.0c05038

64. Phase Distribution, Composition, and Disorder in Y₂(Hf,Sn)₂O₇ Ceramics: Insights from Solid-State NMR Spectroscopy and First-Principles Calculations

Author:
Robert F. Moran; Arantxa Fernandes; Daniel M. Dawson; Scott Sneddon; Amy S. Gandy; Nik Reeves-McLaren; Karl R. Whittle; Sharon E. Ashbrook
Source:
Journal of physical chemistry 2020 v.124 no.31 pp. 17073-17084
ISSN:
1932-7455
Subject:
X-ray diffraction; cations; chemical species; nuclear magnetic resonance spectroscopy; oxygen; phase transition; quantitative analysis
Abstract:
... A NMR crystallographic approach, combining ⁸⁹Y, ¹¹⁹Sn and ¹⁷O NMR spectroscopy with X-ray diffraction and first-principles calculations has been used investigate the number and type of phases present, and the local structure and disorder in Y₂Hf₂–ₓSnₓO₇ ceramics. Although a phase change is predicted with increasing Hf content, NMR spectra clearly show the presence of a significant two-phase region ...
DOI:
10.1021/acs.jpcc.0c04542

65. Doping Evolution of the Local Electronic and Structural Properties of the Double Perovskite Ba₂Na₁–ₓCaₓOsO₆

Author:
Jagadesh Kopula Kesavan; Dario Fiore Mosca; Samuele Sanna; Francesco Borgatti; Götz Schuck; Phuong Minh Tran; Patrick M. Woodward; Vesna F. Mitrović; Cesare Franchini; Federico Boscherini
Source:
Journal of physical chemistry 2020 v.124 no.30 pp. 16577-16585
ISSN:
1932-7455
Subject:
X-radiation; X-ray absorption spectroscopy; X-ray diffraction; absorption; ambient temperature; cations; crystal structure; electron transfer; osmium; oxidation
Abstract:
... We present a combined experimental and computational study of the effect of charge doping in the osmium based double perovskite Ba₂Na₁–ₓCaₓOsO₆ for 0 ≤ x ≤ 1 in order to provide a structural and electronic basis for understanding this complex Dirac–Mott insulator material. Specifically, we investigate the effects of the substitution of monovalent Na with divalent Ca, a form of charge doping or all ...
DOI:
10.1021/acs.jpcc.0c04807

66. Magnetic zeolite synthesis for efficient removal of cesium in a lab-scale continuous treatment system

Author:
Omar Falyouna; Osama Eljamal; Ibrahim Maamoun; Atsushi Tahara; Yuji Sugihara
Source:
Journal of colloid and interface science 2020 v.571 pp. 66-79
ISSN:
0021-9797
Subject:
X-ray diffraction; adsorbents; adsorption; aqueous solutions; cations; cesium radioisotopes; crystal structure; groundwater; iron; magnetism; models; pH; salinity; scanning electron microscopy; seawater; sorption isotherms; temperature; water pollution; zeolites
Abstract:
... Radioactive cesium was resealed to the environment as a result of many nuclear incidents. An effective treatment system is urgently needed to safely handle radioactive cesium-contaminated waters. Based on nanoscale zerovalent iron (nZVI) and zeolite, nine adsorbents were synthesized and applied to remove cesium from aqueous solutions. Magnetic zeolite composite (Ze/Fe⁰) was selected as the ideal a ...
DOI:
10.1016/j.jcis.2020.03.028

67. Modification of Li- and Mn-Rich Cathode Materials via Formation of the Rock-Salt and Spinel Surface Layers for Steady and High-Rate Electrochemical Performances

Author:
Sandipan Maiti; Hadar Sclar; Rosy; Judith Grinblat; Michael Talianker; Larisa Burstein; Malachi Noked; Boris Markovsky; Doron Aurbach
Source:
ACS applied materials & interfaces 2020 v.12 no.29 pp. 32698-32711
ISSN:
1944-8252
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; acids; anodes; argon (noble gases); carbonates; cathodes; cations; differential scanning calorimetry; electric potential difference; electrochemistry; heat; heat treatment; hysteresis; lithium; lithium batteries; manganese oxides; nickel; temperature; transmission electron microscopy
Abstract:
... We demonstrate a novel surface modification of Li- and Mn-rich cathode materials 0.33Li₂MnO₃·0.67LiNi₀.₄Co₀.₂Mn₀.₄O₂ for lithium-ion batteries (high-energy Ni–Co–Mn oxides, HE-NCM) via their heat treatment with trimesic acid (TA) or terephthalic acid at 600 °C under argon. We established the optimal regimes of the treatment—the amounts of HE-NCM, acid, temperature, and time—resulting in a signific ...
DOI:
10.1021/acsami.0c07497

68. Application of metallic nanoparticle-biochars with ionic liquids for thermal transfer fluids

Author:
Hsin-Liang Huang; Zi-Hao Huang; Yi-Cheng Chu; Hong-Ping Lin; Yun-Jung Chang
Source:
Chemosphere 2020 v.250 pp. 126219
ISSN:
0045-6535
Subject:
X-ray diffraction; adsorption; anions; biochar; cations; chlorides; copper; copper hydroxide; cupric oxide; heat transfer; hydrogen bonding; imidazole; ionic liquids; irradiation; lighting; moieties; nanoparticles; nanosilver; nuclear magnetic resonance spectroscopy; silver; solar collectors; solar radiation; temperature; thermal properties
Abstract:
... Ionic liquids (ILs (1-butyl-3-methylimidazolium chloride ([C₄mim][Cl]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([C₄mim][BF₄]))) were used as heat transfer fluids for solar thermal collectors. The additive of ILs was biochar containing copper and silver nanoparticles (Cu–Ag/biochar) to improve the adsorption of solar irradiation and thermal conductivities. After impregnation and reduction ...
DOI:
10.1016/j.chemosphere.2020.126219

69. Characterization of biotite drugs used in traditional medicine

Author:
Apsara Wijenayake; Amarasooriya Pitawala; Ratnayake Bandara; Charmalie Abayasekara
Source:
Heliyon 2020 v.6 no.7 pp. e04483
ISSN:
2405-8440
Subject:
X-ray diffraction; atomic absorption spectrometry; biotite; cations; drugs; heat treatment; oxidation; pharmaceutical industry; thermogravimetry; toxicity; traditional medicine; water solubility
Abstract:
... Temperature-induced mineral alterations are extensively used in traditional pharmaceutical industry. Studies on the traditional heating methods for enhancing pharmaceutical properties and on the toxicity of mineral-based medicines are limited. This study focuses on the effect of thermal alterations on mineralogical and chemical changes of biotite with respect to two traditional drugs (Abhrak Bhasm ...
DOI:
10.1016/j.heliyon.2020.e04483

70. Encapsulation of ionic liquids into POMs-based metal–organic frameworks: screening of POMs-ILs@MOF catalysts for efficient cycloolefins epoxidation

Author:
Manman Jin; Qingtao Niu; Guodong Liu; Zhiguo Lv; Chongdian Si; Hongyue Guo
Source:
Journal of materials science 2020 v.55 no.19 pp. 8199-8210
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acidity; catalysts; catalytic activity; cations; coordination polymers; encapsulation; epoxidation reactions; hydrogen peroxide; imidazoles; ionic liquids; iron; molybdenum; nitrogen; oxidation; porous media; scanning electron microscopy; screening; sorption; surface area; thermogravimetry; transmission electron microscopy
Abstract:
... A series of ionic liquids (ILs, 1-octyl-3-methylimidazolium bromide)-functionalized polyoxometalates (POMs)-based metal–organic frameworks (MOFs) hybrids (i.e., POMs-ILs@MOFs) were facilely prepared via encapsulation strategy. The as-synthesized materials were well characterized via XRD, FT-IR, N₂ sorption, TEM, SEM, UV–Vis DRS, TG, XPS, and ICP analysis to confirm that POMs was successfully immob ...
DOI:
10.1007/s10853-020-04611-9

71. A novel polyoxovanadate-based Co-MOF: highly efficient and selective oxidation of a mustard gas simulant by two-site synergetic catalysis

Author:
Hong-Rui Tian; Zhong Zhang; Shu-Mei Liu; Tian-Yi Dang; Xiao-Hui Li; Ying Lu; Shu-Xia Liu
Source:
Journal of materials chemistry A 2020 v.8 no.25 pp. 12398-12405
ISSN:
2050-7496
Subject:
X-ray diffraction; active sites; aromatic compounds; catalysts; catalytic activity; cations; cobalt; coordination polymers; ethylenediamines; geometry; hydrogen peroxide; molecular weight; nickel; organic sulfur compounds; oxidants; oxidation
Abstract:
... Two novel polyoxovanadate-based metal–organic frameworks (MOFs), [Co(bib)]{V₂O₆} (V–Co-MOF) and [Ni(en)(bib)]{V₂O₆}·2H₂O (V–Ni-MOF) (bib = 1,4-bis(1H-imidazoly-1-yl)benzene, en = ethylenediamine) were facilely synthesized under mild hydrothermal conditions. Single-crystal X-ray diffraction analysis shows that the V sites in both compounds adopt {VO₄} tetrahedral coordination geometries, and the Co ...
DOI:
10.1039/d0ta00537a

72. Potassium Single Cation Ionic Liquid Electrolyte for Potassium-Ion Batteries

Author:
Hiroki Yamamoto; Chih-Yao Chen; Keigo Kubota; Kazuhiko Matsumoto; Rika Hagiwara
Source:
Journal of physical chemistry 2020 v.124 no.29 pp. 6341-6347
ISSN:
1520-5207
Subject:
X-ray diffraction; batteries; cations; electric potential difference; electrochemistry; electrodes; energy density; flammability; graphene; ionic liquids; physical chemistry; potassium; vapor pressure
Abstract:
... Potassium-ion batteries (PIBs) are a promising post-lithium-ion battery (LIB), as their resources are abundant and low-cost and may have a higher voltage than LIBs. However, the high operating voltage and extremely high reactivity of potassium metal require a chemically safe electrolyte with oxidative and reductive stabilities. In this study, a potassium single cation ionic liquid (K-SCIL), which ...
DOI:
10.1021/acs.jpcb.0c03272

73. Embellishing bis-1,2,4-triazole with four nitroamino groups: advanced high-energy-density materials with remarkable performance and good stability

Author:
Qing Lang; Qi Sun; Qian Wang; Qiuhan Lin; Ming Lu
Source:
Journal of materials chemistry A 2020 v.8 no.23 pp. 11752-11760
ISSN:
2050-7496
Subject:
X-ray diffraction; anions; cations; hydrogen bonding; physicochemical properties; salts; triazoles
Abstract:
... Preparing high-energy-density materials (HEDMs) with performance comparable or superior to CL-20 has been at the forefront of energetic material research. In response to this challenge, four nitroamino groups were successfully introduced into a bis-1,2,4-triazole backbone to pursue the higher energetic performance. The neutral compound (NT-00) and high-energy salts, including the divalent (D1–D5) ...
DOI:
10.1039/d0ta03008b

74. Multiple diffusion pathways in LiₓNi₀.₇₇Co₀.₁₄Al₀.₀₉O₂ (NCA) Li-ion battery cathodes

Author:
Thomas E. Ashton; Peter J. Baker; Dustin Bauer; Alexandra R. Groves; Carlos Sotelo-Vazquez; Takashi Kamiyama; Takeshi Matsukawa; Kenji M. Kojima; Jawwad A. Darr
Source:
Journal of materials chemistry A 2020 v.8 no.23 pp. 11545-11552
ISSN:
2050-7496
Subject:
X-radiation; X-ray diffraction; cathodes; cations; dielectric spectroscopy; electrochemistry; lithium; lithium batteries; mixing; neutron diffraction; nickel; oxygen
Abstract:
... Experimental evidence for the presence of two computationally theorised diffusion pathways, namely the oxygen dumbbell hop (ODH) and tetrahedral site hop (TSH), has been given for the first time by muon spin relaxation (µSR) on sub-stoichiometric LiₓNi₀.₇₇Co₀.₁₄Al₀.₀₉O₂. µSR has proven to be a powerful tool that is able to discriminate between diffusion pathways that occur on different timescales ...
DOI:
10.1039/d0ta03809a

75. Structural and functional characterization of rice starch-based superabsorbent polymer materials

Author:
Qianyu Zhang; Zhigao Wang; Cheng Zhang; Rotimi E. Aluko; Jian Yuan; Xingrong Ju; Rong He
Source:
International journal of biological macromolecules 2020 v.153 pp. 1291-1298
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; aluminum; amylopectin; amylose; calcium; cations; composite polymers; glutinous rice; hydrogen bonding; microstructure; potassium; rice starch; scanning electron microscopy; sodium; super absorbent polymers; water binding capacity; water holding capacity; water uptake
Abstract:
... The aim of this work was to develop new, rice starch-based superabsorbent materials (SPAMs), degradable and eco-friendly. Indica rice starch-based SPAM had the best water absorption capacity (439 g water/g) with a relatively high amylose content (23.6%) that may enhance the interaction and structural strength of polymer chains through the formation of hydrogen-bond. Meanwhile, the rigidity and str ...
DOI:
10.1016/j.ijbiomac.2019.10.264

76. High ionic conductivity of multivalent cation doped Li₆PS₅Cl solid electrolytes synthesized by mechanical milling

Author:
Kazuhiro Hikima; Nguyen Huu Huy Phuc; Hirofumi Tsukasaki; Shigeo Mori; Hiroyuki Muto; Atsunori Matsuda
Source:
RSC advances 2020 v.10 no.38 pp. 22304-22310
ISSN:
2046-2069
Subject:
X-ray diffraction; ambient temperature; batteries; cations; heat treatment; milling; transmission electron microscopy
Abstract:
... The performances of next generation all-solid-state batteries might be improved by using multi-valent cation doped Li₆PS₅Cl solid electrolytes. This study provided solid electrolytes at room temperature using planetary ball milling without heat treatment. Li₆PS₅Cl was doped with a variety of multivalent cations, where an electrolyte comprising 98% Li₆PS₅Cl with 2% YCl₃ doping exhibited an ionic co ...
DOI:
10.1039/d0ra02545c

77. Electron beam irradiation for the formation of thick Ag film on Ag₃PO₄

Author:
João Paulo de Campos da Costa; Marcelo Assis; Vinícius Teodoro; Andre Rodrigues; Camila Cristina de Foggi; Miguel Angel San-Miguel; João Paulo Pereira do Carmo; Juan Andrés; Elson Longo
Source:
RSC advances 2020 v.10 no.37 pp. 21745-21753
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; cations; irradiation; molecular dynamics; oxygen; scanning electron microscopy; semiconductors; silver; simulation models
Abstract:
... This study demonstrates that the electron beam irradiation of materials, typically used in characterization measurements, could be employed for advanced fabrication, modification, and functionalization of composites. We developed irradiation equipment using an electron beam irradiation source to be applied in materials modification. Using this equipment, the formation of a thick Ag film on the Ag₃ ...
DOI:
10.1039/d0ra03179h

78. Correlating the size and cation inversion factor in context of magnetic and optical behavior of CoFe₂O₄ nanoparticles

Author:
Jitendra Pal Singh; Jae Yeon Park; Varsha Singh; So Hee Kim; Weon Cheol Lim; Hemaunt Kumar; Y. H. Kim; Sangsul Lee; Keun Hwa Chae
Source:
RSC advances 2020 v.10 no.36 pp. 21259-21269
ISSN:
2046-2069
Subject:
X-radiation; X-ray absorption spectroscopy; X-ray diffraction; cations; cobalt; crystallites; ferrimagnetic materials; magnetism; oxidation; temperature
Abstract:
... Herein, the size dependent behavior of cobalt ferrite nanoparticles was investigated using synchrotron radiation based techniques. Scanning electron micrographs revealed the enhancement of particle/crystallite size with increase of annealing temperature. Moreover, the shape of these particles also changed with increase of crystallite size. Saturation magnetization increased with increase of crysta ...
DOI:
10.1039/d0ra01653e

79. Negative Pressure Engineering with Large Cage Cations in 2D Halide Perovskites Causes Lattice Softening

Author:
Xiaotong Li; Yongping Fu; Laurent Pedesseau; Peijun Guo; Shelby Cuthriell; Ido Hadar; Jacky Even; Claudine Katan; Constantinos C. Stoumpos; Richard D. Schaller; Elad Harel; Mercouri G. Kanatzidis
Source:
Journal of the American Chemical Society 2020 v.142 no.26 pp. 11486-11496
ISSN:
1520-5126
Subject:
X-ray diffraction; absorption; cations; crystallization; geometry; guanidinium; microscopy; photoluminescence
Abstract:
... Organic–inorganic hybrid halide perovskites are promising semiconductors with tailorable optical and electronic properties. The choice of A-site cation to support a three-dimensional (3D) perovskite structure AMX₃ (where M is a metal and X is a halide) is limited by the geometric Goldschmidt tolerance factor. However, this geometric constraint can be relaxed in two-dimensional (2D) perovskites, pr ...
DOI:
10.1021/jacs.0c03860

80. Structural and Electrochemical Properties of Low-Cobalt-Content LiNi₀.₆₊ₓCo₀.₂–ₓMn₀.₂O₂ (0.0 ≤ x ≤ 0.1) Cathodes for Lithium-Ion Batteries

Author:
Li-Po He; Kun Li; Yao Zhang; Jun Liu
Source:
ACS applied materials & interfaces 2020 v.12 no.25 pp. 28253-28263
ISSN:
1944-8252
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; activation energy; atomic absorption spectrometry; cathodes; cations; cobalt; dielectric spectroscopy; diffusivity; electric potential difference; electrochemistry; energy density; lithium; lithium batteries; mixing; nickel; oxides; particle size; scanning electron microscopy; thermal stability; titration
Abstract:
... The layered oxides LiNi₀.₆₊ₓCo₀.₂–ₓMn₀.₂O₂ are promising cathode materials for Li-ion batteries (LIBs) owing to their moderate energy densities and structure stabilities. In this study, we systematically investigate the effects of substitution of Co by Ni on the structures, morphologies, and electrochemical properties of LiNi₀.₆₊ₓCo₀.₂–ₓMn₀.₂O₂ (0.0 ≤ x ≤ 0.1). The physical characteristics of thes ...
DOI:
10.1021/acsami.0c06824

81. A Promising Phase Change Material with Record High Ionic Conductivity over a Wide Temperature Range of a Plastic Crystal Phase and Magnetic Thermal Memory Effect

Author:
Yin Qian; Dong-Sheng Shao; Wan-Wan Yao; Zhi-Yuan Yao; Lifeng Wang; Wen-Long Liu; Xiao-Ming Ren
Source:
ACS applied materials & interfaces 2020 v.12 no.25 pp. 28129-28138
ISSN:
1944-8252
Subject:
X-ray diffraction; anions; cations; cooling; crystals; differential scanning calorimetry; ferrimagnetic materials; heat; latent heat; light microscopy; magnetism; nickel; phase transition; temperature
Abstract:
... The emerging organic ion plastic crystals (OIPCs) are the most promising candidates used as solid-state electrolytes in a range of ionic devices. To endow an OIPC with additional functionality may create a new type of material for multifunctional devices. Herein, we present an ion plastic crystal, [EMIm][Ni(mnt)₂] (1; [EMIm]⁺ = 1-ethyl-3-methylimidazolium and mnt²– = maleonitriledithiolate), and i ...
DOI:
10.1021/acsami.0c04751

82. Synthesis and crystal structures of β-[Be(DMF)₄]I₂, [Be(Pyr)₄]I₂, [Be(NMP)₄]I₂ and [BeI₂(Lut)₂]

Author:
Timotheus Hohl; Torben Sinn; Constantin Hoch
Source:
Zeitschrift für Naturforschung 2020 v.75 no.5 pp. 509-516
ISSN:
1865-7117
Subject:
X-ray diffraction; beryllium; cations; chemical bonding; crystal structure; electrochemistry; iodides; iodine; ligands; pyridines; pyrrolidones; solvents
Abstract:
... Four solvent complexes of beryllium iodide were prepared by dissolving BeI₂ in N,N-dimethyl formamide (DMF), pyridine (Pyr), N-methyl pyrrolidone (NMP) and 2,6-dimethyl pyridine (2,6-lutidine, Lut). Their crystal structures were established from single crystal X-ray diffraction. For [Be(DMF)₄]I₂ a new modification is reported (monoclinic, space group P2₁/c, a = 12.491(2), b = 11.593(2), c = 15.310 ...
DOI:
10.1515/znb-2020-0035

83. Tailorable Indirect to Direct Band-Gap Double Perovskites with Bright White-Light Emission: Decoding Chemical Structure Using Solid-State NMR

Author:
Abhoy Karmakar; Guy M. Bernard; Alkiviathes Meldrum; Anton O. Oliynyk; Vladimir K. Michaelis
Source:
Journal of the American Chemical Society 2020 v.142 no.24 pp. 10780-10793
ISSN:
1520-5126
Subject:
X-ray diffraction; bismuth; cations; cesium; chemical structure; density functional theory; indium; lead; lighting; mixing; nuclear magnetic resonance spectroscopy; optical properties; photoluminescence; solid solutions; stable isotopes; ultraviolet radiation; white light
Abstract:
... Efficient white-light-emitting single-material sources are ideal for sustainable lighting applications. Though layered hybrid lead–halide perovskite materials have demonstrated attractive broad-band white-light emission properties, they pose a serious long-term environmental and health risk as they contain lead (Pb²⁺) and are readily soluble in water. Recently, lead-free halide double perovskite ( ...
DOI:
10.1021/jacs.0c02198

84. A green assisted route for the fabrication of a high-efficiency self-healing anti-corrosion coating through graphene oxide nanoplatform reduction by Tamarindus indiaca extract

Author:
Sajjad Akbarzadeh; Mohammad Ramezanzadeh; Bahram Ramezanzadeh; Ghasem Bahlakeh
Source:
Journal of hazardous materials 2020 v.390 pp. 122147
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; Tamarindus; X-ray diffraction; cations; coatings; corrosion; epoxides; graphene; graphene oxide; lead; nanocarriers; phosphates; scanning electron microscopy; sodium chloride; steel; sustainable development; thermogravimetry; toxicity; ultraviolet-visible spectroscopy; zinc
Abstract:
... The major focus of the recent studies in metals corrosion protection field is now the development of non-hazardous and eco-friendly materials as effective substitutes for some of the well-known conventional toxic/unsafe inhibitors based on chromate, lead, phosphate, and azole derivatives. The present work focuses on the sustainable development of an intelligent self-healing anticorrosion coating u ...
DOI:
10.1016/j.jhazmat.2020.122147

85. Desorption of cesium from hydrobiotite by hydrogen peroxide with divalent cations

Author:
Ilgook Kim; June-Hyun Kim; Sung-Man Kim; Chan Woo Park; In-Ho Yoon; Hee-Man Yang; Kune-Woo Lee
Source:
Journal of hazardous materials 2020 v.390 pp. 121381
ISSN:
0304-3894
Subject:
X-ray diffraction; ambient temperature; biotite; cation exchange; cations; cesium radioisotopes; desorption; hydrogen peroxide; iron; magnesium; sorption; vermiculite
Abstract:
... In this study, hydrogen peroxide (H₂O₂) was used to enhance the cation-exchange treatment for Cs⁺ desorption from clay minerals. Among various investigated clay minerals, hydrobiotite (HBT), which has interstratified layers of vermiculite and biotite, exhibited the highest Cs⁺ sorption capacity and the most favorable H₂O₂ activation because of its high Fe content. In X-ray diffraction analysis, HB ...
DOI:
10.1016/j.jhazmat.2019.121381

86. Hydroxyl Defects and Oxide Vacancies within Ringwoodite—toward Understanding the Defect Chemistry of Spinel-Type Oxides

Author:
Helen Grüninger; Zhaodong Liu; J. Ole Brauckmann; Hongzhan Fei; Tiziana Boffa Ballaran; Thomas Martin; Renée Siegel; Arno P. M. Kentgens; Daniel J. Frost; Jürgen Senker
Source:
Journal of physical chemistry 2020 v.124 no.22 pp. 12001-12009
ISSN:
1932-7455
Subject:
X-ray diffraction; batteries; cations; nuclear magnetic resonance spectroscopy; physical chemistry; water uptake
Abstract:
... The high-pressure mineral ringwoodite (γ-Mg₂SiO₄) is a major component of the Earth’s mantle and is able to incorporate large amounts of water in the form of hydroxyl defects. Understanding its underlying defect chemistry does not only have implications for geological transport processes, but will also allow for extending this knowledge to defect mechanisms within spinel-type oxide materials in ge ...
DOI:
10.1021/acs.jpcc.0c03016

87. A new structure family of oxide-ion conductors based on BaGdInO₄

Author:
Hiroshi Yaguchi; Kotaro Fujii; Masatomo Yashima
Source:
Journal of materials chemistry A 2020 v.8 no.17 pp. 8638-8647
ISSN:
2050-7496
Subject:
X-ray diffraction; barium; calcium; cations; crystal structure; electrical conductivity; geometry; magnesium; oxygen; partial pressure; prisms; strontium
Abstract:
... BaRInO₄-based materials (R = Nd, Sm, Ho, Y, Er, and Yb) have attracted much attention due to their oxide-ion conduction and unique (110) layered perovskite structures (monoclinic P2₁/c BaNdInO₄-type structure). Here, we report new compounds BaGdInO₄ (GdBaInO₄) and BaGd₀.₉A₀.₁InO₃.₉₅ (A = Mg, Ca, and Sr). It was found that these compounds belong to a new structure family of oxide-ion conductors. Su ...
DOI:
10.1039/c9ta13704a

88. Exploring a lead-free organic–inorganic semiconducting hybrid with above-room-temperature dielectric phase transition

Author:
Yuyin Wang; Shiguo Han; Xitao Liu; Zhenyue Wu; Zhihua Sun; Dhananjay Dey; Yaobin Li; Junhua Luo
Source:
RSC advances 2020 v.10 no.30 pp. 17492-17496
ISSN:
2046-2069
Subject:
X-ray diffraction; ambient temperature; cations; dielectric properties; differential scanning calorimetry; lead; light emitting diodes; phase transition; semiconductors; solar energy
Abstract:
... Recently, organic–inorganic hybrid lead halide perovskites have attracted great attention for optoelectronic applications, such as light-emitting diodes, photovoltaics and optoelectronics. Meanwhile, the flexible organic components of these compounds give rise to a large variety of important functions, such as dielectric phase transitions. However, those containing Pb are harmful to the environmen ...
DOI:
10.1039/c9ra09289g

89. Bamboo biochar-catalytic degradation of lignin under microwave heating

Author:
Maimaitiaili Tayier; Yunfeng Zhao; Dengle Duan; Rongge Zou; Yunpu Wang; Roger Ruan; Yuhuan Liu
Source:
Journal of wood chemistry and technology 2020 v.40 no.3 pp. 190-199
ISSN:
1532-2319
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; bamboos; biocatalysts; biochar; biofuels; catalytic activity; cations; depolymerization; ethanol; formic acid; iron; lignin; matrix-assisted laser desorption-ionization mass spectrometry; microwave treatment; molecular weight; nickel; temperature
Abstract:
... Lignin biochar-catalytic depolymerization using biochar Fe-600, Fe-800, Ni-600, Ni-800 catalysts under microwave-heating (180 °C for 30 min) was explored in an ethanol/formic acid (1:1) media. Non-catalyst depolymerization was also studied and compared with the biochar-catalysts results. Characteristics of the bio-char catalysts were analyze by BET, XRD, and FT-IR. GPC, FT-IR, and MALDI-TOF MS spe ...
DOI:
10.1080/02773813.2020.1741643

90. A novel Zn(II)-based metal-organic framework as a high selective and sensitive sensor for fluorescent detections of aromatic nitrophenols and antibiotic metronidazole

Author:
Jing Wang; Qingqing Zha; Guoxu Qin; Yonghong Ni
Source:
Talanta 2020 v.211 pp. 120742
ISSN:
0039-9140
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; amino acids; anions; antibiotics; benzoic acid; cations; coordination compounds; detection limit; fluorescence; fluorescent dyes; metronidazole; nitrates; nitrophenols; organic matter; thermogravimetry; ultraviolet radiation; zinc
Abstract:
... A novel fluorescent Zn(II)-based metal-organic framework (Zn-MOF), [Zn₂(oba)₄(4,4′-bpy)₂]ₙ, was successfully synthesized through a simple solvothermal route at 130 °C for 48 h, employing Zn(NO₃)₂·6H₂O, 4,4′-Oxybis(benzoic acid) (oba) and 4,4′-Bipyridine (4,4′-bpy) as the initial reactants, dimethylacetamide (DMA) as the reaction medium. The as-obtained Zn-MOF was characterized by X-ray powder diff ...
DOI:
10.1016/j.talanta.2020.120742

91. Effects of GLDA, MGDA, and EDTA chelating ligands on Pb sorption by montmorillonite

Author:
Farzad Parsadoust; Mehran Shirvani; Hossein Shariatmadari; Mohammad Dinari
Source:
Geoderma 2020 v.366 pp. 114229
ISSN:
0016-7061
Subject:
EDTA (chelating agent); Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; biodegradability; cations; chelates; energy-dispersive X-ray analysis; lead; ligands; montmorillonite; scanning electron microscopy; sediments; soil; sorbents
Abstract:
... In this study, the effects of the new biodegradable chelating ligands, i.e., methylglycinediacetic acid (MGDA) and L-glutamic acid-N,N-diacetic acid (GLDA), were compared with that of ethylenediaminetetraacetic acid (EDTA) on lead (Pb) sorption by montmorillonite (MMT) at equimolar Pb:ligand ratios. The results of PHREEQC simulations indicated that Pb was predominantly present in the form of negat ...
DOI:
10.1016/j.geoderma.2020.114229

92. Novel concept of steam modification towards energy and iron recovery from steel slag: Oxidation mechanism and process evaluation

Author:
Peng Li; Hongwei Guo; Jianming Gao; Jie Min; Bingji Yan; Dong Chen; Seshadri Seetharaman
Source:
Journal of cleaner production 2020 v.254 pp. 119952
ISSN:
0959-6526
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; activation energy; calcium; cations; cooling; energy; energy-dispersive X-ray analysis; ferrimagnetic materials; hydrogen production; iron; magnesium; magnetic properties; magnetic separation; magnetism; manganese; models; oxidation; phase transition; scanning electron microscopy; slags; steam; steel; temperature
Abstract:
... The motivation of this work is driven by the feasible hydrogen production, through the reaction between iron-bearing phases, i.e. RO phase, metallic Fe in steel slag and steam. The RO phase can be regarded as (Mn,Mg,Ca)ₓFe₁₋ₓO wüstite that divalent iron is partially substituted by foreign cations of magnesium, manganese and calcium. The reaction behavior in terms of hydrogen generation variation i ...
DOI:
10.1016/j.jclepro.2019.119952

93. A Porous Material Made from Curdlan by EDTAD Functionalization Shows High Adsorption Capacity on Removal of Cu2+ and Zn2+ from Water

Author:
Tingrui Zhu; Deqiang Zhu; Jing Li
Source:
Journal of polymers and the environment 2020 v.28 no.5 pp. 1368-1377
ISSN:
1566-2543
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; beta-glucans; biocompatible materials; carbon; cations; chelation; copper; crosslinking; curdlan; desorption; esterification; ethylenediamines; ion exchange; moieties; nuclear magnetic resonance spectroscopy; pH; porous media; scanning electron microscopy; sorption isotherms; stable isotopes; thermogravimetry; wastewater; zinc
Abstract:
... A linear bacterial β-1,3-glucan, curdlan, was functionalized by ethylenediamine tetraacetic dianhydride (EDTAD) to form a porous insoluble material (Curd-E) in this study. Various technics, including FTIR, solid state ¹³C NMR, XRD, TGA, and SEM, were combined to determine the chemical and microscopic structure of the resultant. It's suggested that EDTAD esterified and cross-linked C6-hydroxyl grou ...
DOI:
10.1007/s10924-020-01691-1

94. Guar gum cinnamate ouzo nanoparticles for bacterial contact killing in water environment

Author:
Aatrayee Das; Sonia Kundu; Sumanta Kumar Ghosh; Aalok Basu; Mradu Gupta; Arup Mukherjee
Source:
Carbohydrate research 2020 v.491 pp. 107983
ISSN:
0008-6215
Subject:
Escherichia coli; Gram-positive bacteria; Staphylococcus aureus; X-ray diffraction; antibacterial properties; biopolymers; cations; cinnamic acid; decontamination; esters; guar gum; nanoparticles; nuclear magnetic resonance spectroscopy; scanning electron microscopy; solvents; thermal analysis
Abstract:
... Herein we report the synthesis of newer guar gum cinnamate esters (GGC) following a Hofmeister cation guided homogeneous phase reaction. High degree of substitution (DS) guar gum cinnamate was obtained using, cinnamic acid halide reactant at a 1:3 M ratio. The biopolymer was fully characterized in FT-IR,¹³C NMR, XRD and thermal analysis. Nanoparticles were further developed in a facile ouzo solven ...
DOI:
10.1016/j.carres.2020.107983

95. Modulation of the acidity of a vermiculite and its potential use as a catalytic support

Author:
Jahaziel Amaya; Luis Bobadilla; Lola Azancot; Miguel Centeno; Sonia Moreno; Rafael Molina
Source:
Journal of materials science 2020 v.55 no.15 pp. 6482-6501
ISSN:
0022-2461
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; acid treatment; acidity; adsorption; catalytic activity; cations; decane; delamination; isopropyl alcohol; nitrogen; temperature; vermiculite
Abstract:
... The modulation and characterization of the acidity of a vermiculite were carried out, which was modified by delamination by means of hydrothermal and acid treatments with the subsequent incorporation of AlZr and AlCe species to modulate the acidity. The effect of these species was evaluated regarding the structural (XRD, XPS and IR), textural (N₂ sortometry) and acidity properties (NH₃-TPD, NH₃-DR ...
DOI:
10.1007/s10853-020-04445-5

96. Phase transition temperature and negative thermal expansion of Sc-substituted In2(MoO4)3 ceramics

Author:
Zhiping Zhang; Yuenan Wang; Weikang Sun; Xiuyun Zhang; Hongfei Liu; Xiaobing Chen; Xianghua Zeng
Source:
Journal of materials science 2020 v.55 no.14 pp. 5730-5740
ISSN:
0022-2461
Subject:
Raman spectroscopy; X-ray diffraction; ambient temperature; cations; ceramics; coprecipitation; crystal structure; indium; microstructure; phase transition; thermal expansion
Abstract:
... A series of Sc-substituted In₂Mo₃O₁₂ ceramics were synthesized by the chemical co-precipitation method. The results reveal that In³⁺ can be substituted by Sc³⁺ and form a single phase with high purity for all In₂₋ₓScₓMo₃O₁₂ (x = 0, 0.3, 0.6, 0.9, 1.2 and 1.5) samples. The crystal structure of In₂₋ₓScₓMo₃O₁₂ changes from monoclinic to orthorhombic symmetry with increasing Sc³⁺-content, confirmed by ...
DOI:
10.1007/s10853-020-04441-9

97. Theoretical Modeling of Electronic Structures of Polyiodide Species Included in α-Cyclodextrin

Author:
Masaki Okuda; Takato Hiramatsu; Mitsuru Yasuda; Mika Ishigaki; Yukihiro Ozaki; Michitoshi Hayashi; Keisuke Tominaga; Eri Chatani
Source:
Journal of physical chemistry 2020 v.124 no.20 pp. 4089-4096
ISSN:
1520-5207
Subject:
X-ray diffraction; absorption; amylose; cations; color; density functional theory; geometry; iodine; lithium; molecular models; quantum mechanics; spectral analysis
Abstract:
... The molecular mechanism of blue color formation in an iodine–starch reaction is studied by employing the iodine−α-cyclodextrin (α-CD) complex as a practical model system that resembles the structural properties of the blue amylose–iodine complex. To this end, we construct, using the quantum chemistry method, a molecular model of the complex (I₅–/Li⁺/2α-CD) that consists of one I₅–, two molecules o ...
DOI:
10.1021/acs.jpcb.0c01749

98. Thermally Stable and Deep Red Luminescence of Sr₁–ₓBaₓ[Mg₂Al₂N₄]:Eu²⁺ (x = 0–1) Phosphors for Solid State and Agricultural Lighting Applications

Author:
Julius L. Leaño; Carl Osby M. Mariano; Wen-Tse Huang; Sebastian Mahlik; Tadeusz Lesniewski; Marek Grinberg; Hwo-Shuenn Sheu; Shu-Fen Hu; Ru-Shi Liu
Source:
ACS applied materials & interfaces 2020 v.12 no.20 pp. 23165-23171
ISSN:
1944-8252
Subject:
X-ray absorption spectroscopy; X-ray diffraction; aluminum; barium; cations; crystal structure; energy; europium; lighting; magnesium; molybdenum; nitrides; photoluminescence; strontium; thermal stability; wavelengths
Abstract:
... The systematic substitution of Ba in the Sr site of Sr[Mg₂Al₂N₄]:Eu²⁺ generates a deep-red-emitting phosphor with enhanced thermal luminescence properties. Gas pressure sintering (GPS) of all-nitride starting materials in Molybdenum (Mo) crucibles yields pure-phase red-orange-colored phosphors. Peaks in the synchrotron X-ray diffraction (SXRD) data show a systematic shift toward smaller angles due ...
DOI:
10.1021/acsami.0c07345

99. Facile fabrication of Cu(II) coordinated chitosan-based magnetic material for effective adsorption of reactive brilliant red from aqueous solution

Author:
Siyuan Yu; Jianlan Cui; Jingbao Wang; Congshan Zhong; Xiao Wang; Ning Wang
Source:
International journal of biological macromolecules 2020 v.149 pp. 562-571
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; cations; copper; dyes; electrostatic interactions; endothermy; ionic strength; iron oxides; kinetics; magnetic materials; magnetism; models; nitrogen; pH; scanning electron microscopy; silica; sorption isotherms; temperature; thermodynamics; thermogravimetry; wastewater
Abstract:
... In order to effectively remove reactive brilliant red (RBR) in aqueous solution, a novel Cu(II) coordinated chitosan-based magnetic composite (CTS-Cu@SiO₂@Fe₃O₄) was prepared. The physicochemical properties of the resultant adsorbent were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), vibrating sample magnetometer (VSM) thermogravimetric (TG) analysis, sc ...
DOI:
10.1016/j.ijbiomac.2020.01.285

100. Organic Cation Alloying on Intralayer A and Interlayer A’ sites in 2D Hybrid Dion–Jacobson Lead Bromide Perovskites (A’)(A)Pb₂Br₇

Author:
Lingling Mao; Peijun Guo; Mikaël Kepenekian; Ioannis Spanopoulos; Yihui He; Claudine Katan; Jacky Even; Richard D. Schaller; Ram Seshadri; Constantinos C. Stoumpos; Mercouri G. Kanatzidis
Source:
Journal of the American Chemical Society 2020 v.142 no.18 pp. 8342-8351
ISSN:
1520-5126
Subject:
Raman spectroscopy; X-ray diffraction; bromine; cations; crystal structure; density functional theory; electronic equipment; energy; lead; lead bromide; mixing; optical properties; photoluminescence
Abstract:
... Hybrid layered halide perovskites have achieved impressive performance in optoelectronics. New structural types in the two-dimensional (2D) halide system such as the Dion–Jacobson phases have attracted wide research attention due to the short interlayer distance and unique layer orientation that facilitate better charge-transport and higher stability in optoelectronic devices. Here, we report the ...
DOI:
10.1021/jacs.0c01625