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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. Asymmetric Azidation under Hydrogen Bonding Phase-Transfer Catalysis: A Combined Experimental and Computational Study

Author:
Jimmy Wang; Matthew A. Horwitz; Alexander B. Dürr; Francesco Ibba; Gabriele Pupo; Yuan Gao; Paolo Ricci; Kirsten E. Christensen; Tejas P. Pathak; Timothy D. W. Claridge; Guy C. Lloyd-Jones; Robert S. Paton; Véronique Gouverneur
Source:
Journal of the American Chemical Society 2022 v.144 no.10 pp. 4572-4584
ISSN:
1520-5126
Subject:
Lewis acids; Lewis bases; X-ray diffraction; catalysts; catalytic activity; cations; enantiomers; enantioselectivity; fluorides; hydrogen; hydrogen bonding; nitrogen; nuclear magnetic resonance spectroscopy; sodium azide; stereoselective synthesis; urea
Abstract:
... Asymmetric catalytic azidation has increased in importance to access enantioenriched nitrogen containing molecules, but methods that employ inexpensive sodium azide remain scarce. This encouraged us to undertake a detailed study on the application of hydrogen bonding phase-transfer catalysis (HB-PTC) to enantioselective azidation with sodium azide. So far, this phase-transfer manifold has been app ...
DOI:
10.1021/jacs.1c13434

2. Bisstibane–distibane conversion via consecutive single-electron oxidation and reduction reaction

Author:
Alexander Gehlhaar; Hanns Micha Weinert; Christoph Wölper; Nina Semleit; Gebhard Haberhauer; Stephan Schulz
Source:
Chemical communications 2022 v.58 no.47 pp. 6682-6685
ISSN:
1364-548X
Subject:
X-ray diffraction; cations; infrared spectroscopy; naphthalene; oxidation; quantum mechanics
Abstract:
... peri-Substituted naphthalene complexes (Trip₂Pn)₂Naph (Pn = Sb 1, Bi 2) were synthesised and their redox behaviour investigated. Oxidation of 1 with [Fc][BArF] (BArF = B(C₆F₅)₄) yielded [(Trip₂Sb)(TripSb)Naph][BArF] (3) containing the stibane-coordinated stibenium cation [(Trip₂Sb)(TripSb)Naph]⁺. Subsequent reduction of 3 with KC₈ yielded distibane (TripSb)₂Naph (4). 1–4 were characterised by NMR ...
DOI:
10.1039/d2cc01986h

3. Comparative investigation of Ga- and In-CHA in the non-oxidative ethane dehydrogenation reaction

Author:
Jian Pan; Jason Lee; Muyuan Li; Benjamin A. Trump; Raul F. Lobo
Source:
Journal of catalysis 2022 v.413 pp. 812-820
ISSN:
0021-9517
Subject:
Gibbs free energy; X-ray diffraction; activation energy; adsorption; catalytic activity; cations; dehydrogenation; electron microscopy; ethane; hydrides; reaction kinetics; zeolites
Abstract:
... Ga- and In-exchanged chabazite (CHA) zeolites with same Si/Al and metal/Al ratios were prepared via the incipient wetness impregnation method, were characterized using N₂ adsorption, electron microscopy, temperature-programed reactions and were evaluated for the ethane dehydrogenation reaction using flow microreactors. Ga-CHA has higher reaction rates and a lower activation energy of 107 kJ/mol th ...
DOI:
10.1016/j.jcat.2022.07.018

4. Direct Observation of Modulated Radical Spin States in Metal–Organic Frameworks by Controlled Flexibility

Author:
Xiaofeng Chen; Haomiao Xie; Emmaline R. Lorenzo; Charles J. Zeman; Yue Qi; Zoha H. Syed; Aaron E. B. S. Stone; Yao Wang; Subhadip Goswami; Peng Li; Timur Islamoglu; Emily A. Weiss; Joseph T. Hupp; George C. Schatz; Michael R. Wasielewski; Omar K. Farha
Source:
Journal of the American Chemical Society 2022 v.144 no.6 pp. 2685-2693
ISSN:
1520-5126
Subject:
X-ray diffraction; acetone; cations; density functional theory; electron paramagnetic resonance spectroscopy; imidazole; infrared spectroscopy; irradiation; magnetism; solvents; topology; ultraviolet radiation
Abstract:
... Owing to their switchable spin states and dynamic electronic character, organic-based radical species have been invoked in phenomena unique to a variety of fields. When incorporated in solid state materials, generation of organic radicals proves challenging due to aggregation. Metal–organic frameworks (MOFs) are promising candidates for immobilization and stabilization of organic radicals because ...
DOI:
10.1021/jacs.1c11417

5. Enlightening the Alkali Ion Role in the Photomagnetic Effect of FeCo Prussian Blue Analogues

Author:
Jana Glatz; Juan-Ramón Jiménez; Louis Godeffroy; Hans Jurgen von Bardeleben; Laure Fillaud; Emmanuel Maisonhaute; Yanling Li; Lise-Marie Chamoreau; Rodrigue Lescouëzec
Source:
Journal of the American Chemical Society 2022 v.144 no.24 pp. 10888-10901
ISSN:
1520-5126
Subject:
X-ray diffraction; cages; cations; cobalt; cyanides; electron transfer; energy; irradiation; magnetism; temperature; thermodynamics; voltammetry
Abstract:
... FeCo Prussian blue analogues of general formula AₓCoy[Fe(CN)₆]z are responsive, non-stoichiometric materials whose magnetic and optical properties can be reversibly switched by light irradiation. However, elucidating the critical influence of the inserted alkali ion, A⁺, on the material’s properties remains complicated due to their complex local structure. Here, by investigating soluble A ⊂ [Fe₄–C ...
DOI:
10.1021/jacs.2c03421

6. Highly Conductive and Visibly Transparent p-Type CuCrO₂ Films by Ultrasonic Spray Pyrolysis

Author:
Jaewon Kim; Owen Kendall; Jiawen Ren; Billy J. Murdoch; Christopher F. McConville; Joel van Embden; Enrico Della Gaspera
Source:
ACS applied materials & interfaces 2022 v.14 no.9 pp. 11768-11778
ISSN:
1944-8252
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; cations; chromic oxide; electronics; pyrolysis; temperature; ultrasonics
Abstract:
... The development of high-performing p-type transparent conducting oxides will enable immense progress in the fabrication of optoelectronic devices including invisible electronics and all-oxide power electronics. While n-type transparent electrodes have already reached widespread industrial production, the lack of p-type counterparts with comparable transparency and conductivity has created a bottle ...
DOI:
10.1021/acsami.1c24023

7. Impact of dysprosium doped (Dy) zinc ferrite (ZnFe2o4) nanocrystals in photo- fenton exclusion of recalcitrant organic pollutant

Author:
P.Annie Vinosha; J.V.Annie Vinsla; J. Madhavan; Sandhanasamy Devanesan; Mohamad S. AlSalhi; Marcello Nicoletti; Belina Xavier
Source:
Environmental research 2022 v.203 pp. 111913
ISSN:
0013-9351
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; amputation; cations; coprecipitation; crystallites; dysprosium; ferrimagnetic materials; magnetic properties; magnetism; methylene blue; nanocrystals; oxygen; photocatalysts; pollutants; research; surface area; transmission electron microscopy; zinc
Abstract:
... The issue of effluent, especially organic colorants from several manufacturing units overlays an immense delinquent of the current epoch owing to its effect on oncogenic health hazards. Thus, Rare Earth Metal dysprosium (Dy) doped Zinc Ferrite (ZnFe₂O₄) were as-synthesized by a facile co-precipitation technique as an effectual nano photocatalyst intended to the amputation of these noxious dyes. Th ...
DOI:
10.1016/j.envres.2021.111913

8. Integrated approach to unsaturated zone characterization as it relates to burial practices and its impact on the immediate environment

Author:
Olabanji A. Ojo; Charles A. Oyelami; Mutiu A. Fakunle; Ayodeji K. Ogundana; Oluwole E. Ajayi; Tochukwu E. Uche
Source:
Heliyon 2022 v.8 no.7 pp. e09831
ISSN:
2405-8440
Subject:
World Health Organization; X-radiation; X-ray diffraction; aquifers; cations; clay; coliform bacteria; electrical resistance; environmental impact; fluorescence; gravel; groundwater contamination; laterites; particle size distribution; permeability; risk; sand; silt; specific gravity; streams; topography; water analysis; water content; water hardness; wetlands; Nigeria
Abstract:
... Improper sitting positioning of cemeteries in Nigeria is mostly responsible for groundwater pollution. Poor water quality may lead to some communicable diseases in most rural and urban areas of the southwestern part of Nigeria. The environmental impact of cemeteries close to residential areas within the Edunabon metropolis, southwestern part of Nigeria, was assessed. The research is aimed to under ...
DOI:
10.1016/j.heliyon.2022.e09831

9. Investigation of anionic group effects on the shale inhibition performance of fatty acid-based ionic liquids and their inhibition mechanism

Author:
Han Jia; Shaoyan Wang; Zhe Wang; Qiang Wang; Haidong Jia; Lin Song; Xuwen Qin; Fangning Fan; Zhe Li; Pan Huang
Source:
Colloids and surfaces 2022 v.636 pp. 128135
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; bentonite; cations; contact angle; octanoic acid; palmitates; research and development; shale; sodium; thermal stability; zeta potential
Abstract:
... Ionic liquids (ILs) have been introduced as novel high-performance shale inhibitors. The inhibition performance and mechanism of the cation groups in ILs have been widely investigated, whereas the effects of the anionic groups in ILs on the inhibitory capacity have rarely been reported. In this work, a series of fatty acid-based ionic liquids (FAILs) with different anionic groups, methyltrioctylam ...
DOI:
10.1016/j.colsurfa.2021.128135

10. Molecular and crystal structure of a copper(II) complex of sildenafil

Author:
Akhmatkhodja N. Yunuskhodjayev; Shokhista F. Iskandarova; Vahobjon Kh. Sabirov
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1 pp. 31-34
ISSN:
1865-7117
Subject:
X-ray diffraction; cations; chlorides; copper; crystal structure; ligands; methylation; piperazine
Abstract:
... The crystal structure of a copper(II) complex of protonated sildenafil, CuCl₃C₂₂H₃₁N₆O₄S⋅2H₂O was studied by single crystal X-ray diffraction. The compound crystallizes in the monoclinic space group P2₁/n with the unit cell parameters a = 15.4292(2), b = 9.06735(12), c = 21.1752(2) Å, V = 2945.48(7) Å³, Z = 4. The Cu atom is coordinated by the sildenafil ligand via the N2 atom of the pyrazolopyrim ...
DOI:
10.1515/znb-2021-0145

11. Phase transition, thermal stability, and molecular dynamics of organic–inorganic hybrid perovskite [NH₃(CH₂)₆NH₃]CuCl₄ crystals

Author:
Moon Young Choi; Seon Ju Lee; Huiyeong Ju; Ae Ran Lim
Source:
RSC advances 2022 v.12 no.32 pp. 20679-20685
ISSN:
2046-2069
Subject:
X-ray diffraction; cations; geometry; hydrogen bonding; molecular dynamics; nuclear magnetic resonance spectroscopy; phase transition; temperature; thermal stability
Abstract:
... Organic–inorganic hybrid perovskites have various potential applications in fuel cells and solar cells. In this regard, the physicochemical properties of an organic–inorganic [NH₃(CH₂)₆NH₃]CuCl₄ crystal was conducted. The crystals had a monoclinic structure with space group P2₁/n and lattice constants a = 7.2224 Å, b = 7.6112 Å, c = 23.3315 Å, β = 91.930°, and Z = 4 at 300 K, and the phase transit ...
DOI:
10.1039/d2ra02975h

12. Semiconducting silicon–phosphorus frameworks for caging exotic polycations

Author:
Philip Yox; Andrew P. Porter; Rick W. Dorn; Victoria Kyveryga; Aaron J. Rossini; Kirill Kovnir
Source:
Chemical communications 2022 v.58 no.55 pp. 7622-7625
ISSN:
1364-548X
Subject:
X-ray diffraction; cages; cations; chemical communication; crystal structure; hosts; introduced species; mixing; semiconductors
Abstract:
... A series of novel semiconductors AAe₆Si₁₂P₂₀X (A = Na, K, Rb, Cs; Ae = Sr, Ba; X = Cl, Br, I) is reported. Their crystal structures feature a tetrahedral Si–P framework with large zeolite-like pores hosting two types of cations, monoatomic A⁺ and unprecedented octahedral X@Ae₆¹¹⁺. Mixing of the A and Ba cations was detected by single crystal X-ray diffraction and confirmed by multinuclear solid st ...
DOI:
10.1039/d2cc02304k

13. Strong adsorption properties and mechanism of action with regard to tetracycline adsorption of double-network polyvinyl alcohol-copper alginate gel beads

Author:
Quan Liao; Hongwei Rong; Meihua Zhao; Huayong Luo; Zhaorui Chu; Randeng Wang
Source:
Journal of hazardous materials 2022 v.422 pp. 126863
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; aqueous solutions; cations; copper; endothermy; energy-dispersive X-ray analysis; gels; glutaraldehyde; hydrophobicity; mechanism of action; pH; polyvinyl alcohol; sodium alginate; tetracycline; thermodynamics; thermogravimetry
Abstract:
... In the present study, glutaraldehyde was used as a hydrophobic modifier to crosslink polyvinyl alcohol (PVA), and copper ion was immobilized by sodium alginate (SA). Polyvinyl alcohol-copper alginate (PVA-CA) gel beads were prepared by a one-step process, and were used to adsorb and remove tetracycline (TC) from an aqueous solution. The beads were characterized by scanning electron microscopy (SEM ...
DOI:
10.1016/j.jhazmat.2021.126863

14. Structural characteristics, cation distribution, and elastic properties of Cr³⁺ substituted stoichiometric and non-stoichiometric cobalt ferrites

Author:
M. A. Islam; A. K. M. Akther Hossain; M. Z. Ahsan; M. A. A. Bally; M. Samir Ullah; S. M. Hoque; F. A. Khan
Source:
RSC advances 2022 v.12 no.14 pp. 8502-8519
ISSN:
2046-2069
Subject:
X-ray diffraction; cations; cobalt; crystal structure; crystallites; ferrimagnetic materials; oxygen; stoichiometry; temperature
Abstract:
... Structural, elastic and cation distribution properties have been investigated on stoichiometric and non-stoichiometric cobalt ferrites. Crystal structure, formation of spinel type ferrite, chemical bonding, cation distribution, and thermal properties of two series of Cr³⁺ substituted stoichiometric and non-stoichiometric various cobalt ferrites with general formula Co₁₋ₓCrₓFe₂O₄ (S1), and Co₁₊ₓCrₓ ...
DOI:
10.1039/d1ra09090a

15. Ternary rare-earth hydride oxides: stability in air and potential use as precursors for the synthesis of materials

Author:
Nicolas Zapp; Holger Kohlmann
Source:
Zeitschrift für Naturforschung 2022 v.77 no.6 pp. 353-357
ISSN:
1865-7117
Subject:
X-ray diffraction; air; ammonia; carbon; carbon dioxide; cations; color; humidity; hydrides; nitrides; rare earth elements; sesquioxides; thermal stability; yttrium
Abstract:
... Ternary rare-earth hydride oxides (or oxyhydrides) REHO show rather high thermal stability and inertness in air. SmHO remained intact when stored in air for 12 h, while after storage for one year, it completely hydrolysed to form Sm(OH)₃. In contrast, YHO and HoHO show only slight decomposition upon longer storage. The cation’s basicity and the air humidity apparently are crucial factors in the ai ...
DOI:
10.1515/znb-2021-0189

16. Thiocyanate-Passivated Diaminonaphthalene-Incorporated Dion–Jacobson Perovskite for Highly Efficient and Stable Solar Cells

Author:
Yukta; Rohit D. Chavan; Daniel Prochowicz; Pankaj Yadav; Mohammad Mahdi Tavakoli; Soumitra Satapathi
Source:
ACS applied materials & interfaces 2022 v.14 no.1 pp. 850-860
ISSN:
1944-8252
Subject:
X-ray diffraction; ammonium thiocyanate; anisotropy; cations; crystal structure; dielectric spectroscopy; electric potential difference; photoluminescence; relative humidity; van der Waals forces
Abstract:
... Two-dimensional (2D) metal halide perovskites have recently emerged as promising photovoltaic materials due to their superior ambient stability and rich structural diversity. However, power conversion efficiencies (PCEs) of the 2D perovskites solar cells (PSCs) still lag behind their three-dimensional (3D) counterpart, particularly due to the anisotropy in the charge carrier mobility and inhomogen ...
DOI:
10.1021/acsami.1c19546

17. Triangulo-{Erᴵᴵᴵ₃} complex showing field supported slow magnetic relaxation

Author:
Mamo Gebrezgiabher; Sören Schlittenhardt; Cyril Rajnák; Juraj Kuchár; Assefa Sergawie; Juraj Černák; Mario Ruben; Madhu Thomas; Roman Boča
Source:
RSC advances 2022 v.12 no.33 pp. 21674-21680
ISSN:
2046-2069
Subject:
X-ray diffraction; cations; chlorides; ligands; magnetism; spectroscopy
Abstract:
... The triangulo-{Er₃} complex [Er₃Cl(o-van)₃(OH)₂(H₂O)₅]Cl₃·nH₂O (n = 9.4; H(o-van) = o-vanillin) (1) was generated by an in situ method. The isolated Er(iii) complex 1 was characterized by elemental analysis and molecular spectroscopy. The results of single crystal X-ray diffraction studies have shown that 1 is built up of trinuclear [Er₃Cl(o-van)₃(OH)₂(H₂O)₅]³⁺ complex cations, chloride anions and ...
DOI:
10.1039/d2ra04328a

18. Unravelling the Impact of Ta Doping on the Electronic and Structural Properties of Titania: A Combined Theoretical and Experimental Approach

Author:
Vignesh Kumaravel; Maria Barbara Maccioni; Snehamol Mathew; Steven J. Hinder; John Bartlett; Michael Nolan; Suresh C. Pillai
Source:
Journal of physical chemistry 2022 v.126 no.4 pp. 2285-2297
ISSN:
1932-7455
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; cations; ceramics; crystallites; density functional theory; energy; oxygen; reflectance spectroscopy; surface area; thermal stability; titanium dioxide
Abstract:
... The introduction of new energy levels in the forbidden band through the doping of metal ions is an effective strategy to improve the thermal stability of TiO₂. In the present study, the impact of Ta doping on the anatase to rutile transition, structural characteristics, and anion and cation vacancy formation were investigated in detail using density functional theory and experimental characterizat ...
DOI:
10.1021/acs.jpcc.1c10805

19. Aminopropyl bentonites obtained by microwave-assisted silylation for copper removal

Author:
Líbia N.F. Queiroga; Francisco G. Nunes Filho; D.B. França; Francisco Rodrigues; Maguy Jaber; Maria G. Fonseca
Source:
Colloids and surfaces 2021 v.630 pp. 127557
ISSN:
0927-7757
Subject:
X-radiation; X-ray diffraction; adsorption; aqueous solutions; bentonite; cations; ethylene glycol; microwave radiation; microwave treatment; silylation; sodium; sorbents; thermogravimetry; transmission electron microscopy; zeta potential
Abstract:
... In this work, sodium bentonite was silylated with 3-aminopropyltrimethoxysilane (APTMS) under microwave irradiation at 50 °C at different times (5, 10 and 15 min). Silylation was performed in presence and absence of ethylene glycol. Infrared and ²⁹Si NMR spectroscopies were used to monitor the grafting process, while the degree of functionalization was calculated by using CHN elemental analysis an ...
DOI:
10.1016/j.colsurfa.2021.127557

20. Bismuth-rich bimetallic clusters (CuBi₈)³⁺ and [MBi₁₀]⁴⁺ (M = Pd, Pt) from ionothermal synthesis

Author:
Maximilian Knies; Michael Ruck
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 191-196
ISSN:
1865-7117
Subject:
X-ray diffraction; bismuth; cations; copper; ionic liquids
Abstract:
... The reaction of Bi, BiBr₃, and CuBr in the Lewis-acidic ionic liquid [BMIm]Br·4AlBr₃ (BMIm = 1-n-butyl-3-limidazolium) at 180 °C yielded air-sensitive, shiny black crystals of (CuBi₈)[AlBr₄]₂[Al₂Br₇]. Crystals of [MBi₁₀][AlCl₄]₄ (M = Pd, Pt) were obtained by reacting Bi, BiCl₃, and MCl₂ under similar conditions. The structures have been determined by X-ray diffraction on single-crystals and were f ...
DOI:
10.1515/znb-2021-0159

21. Borole/Borapyramidane Relationship

Author:
Qiu Sun; Constantin G. Daniliuc; Xiaoye Yu; Christian Mück-Lichtenfeld; Gerald Kehr; Gerhard Erker
Source:
Journal of the American Chemical Society 2022 v.144 no.17 pp. 7815-7821
ISSN:
1520-5126
Subject:
X-ray diffraction; boron; cations; constitutional isomers; density functional theory; photolysis; thermal degradation
Abstract:
... Boroles and borapyramidanes are classical and nonclassical constitutional isomers, respectively. It is here shown that they can indeed be interconverted. Treatment of the bis(alkynyl)B(C₆F₅) SMe₂ adduct 3·SMe₂ with HB(C₆F₅)₂ gave borole 1·SMe₂, featuring trimethylsilyl substituents in both α positions to boron, by means of a 1,1-hydroboration/alkenylboration sequence. Photolysis of the classical b ...
DOI:
10.1021/jacs.2c01727

22. Cation effects on the properties of halloysite-confined bis(trifluoromethylsulfonyl)imide based ionic liquids

Author:
A. V. Agafonov; L. M. Ramenskaya; E. P. Grishina; N. O. Kudryakova
Source:
RSC advances 2021 v.11 no.61 pp. 38605-38615
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; cations; cold; crystallization; glass transition temperature; halloysite; ionic liquids; nanoclays
Abstract:
... Four types of ionic liquids (ILs) of [X]TFSI ([X]⁺ is a cation such as 1-butyl-3-methylimidazolium BMIm⁺, 1-butyl-1-methylpyrrolidinium BMPyrr⁺, 1-butyl-1-methylpiperidinium BMPip⁺ and methyltrioctylammonium MOc₃Am⁺ and TFSI⁻ is the bis(trifluoromethylsulfonyl)imide anion) were confined in halloysite nanoclay (Hal) at an excess ionic liquid concentration (IL : Hal ∼55 : 45 wt%) and studied by X-ra ...
DOI:
10.1039/d1ra05466j

23. Characterization of H4SiW12O40 supported on mesoporous silica (SBA-15), non-structured amorphous silica and γ-alumina

Author:
Kiria Kojima; Ryota Osuga; Shuhei Yasuda; Toshiyuki Yokoi; Yasuhiro Hosogi; Shintaro Itagaki; Yoshikuni Okumura; Junko N. Kondo
Source:
Journal of catalysis 2021 v.395 pp. 387-398
ISSN:
0021-9517
Subject:
Lewis acids; X-ray diffraction; adsorption; catalytic activity; cations; ethanol; hydrogen; porous media; pyridines; silica; surface area; thermal degradation
Abstract:
... H₄SiW₁₂O₄₀ (HSiW) was supported on mesoporous silica (SBA-15), non-structured amorphous silica (AEROSIL) and γ-alumina (Al₂O₃) by impregnation. The supported HSiW samples were characterized by X-ray diffraction (XRD), N₂ adsorption-desorption isotherms, infrared (IR) spectroscopy and ethanol dehydration reaction as a model reaction. HSiW was not highly dispersed even at 29 wt% loading, but the hex ...
DOI:
10.1016/j.jcat.2021.01.011

24. A Comprehensive Study on Gelatin- and Whey Protein Isolate-Based Edible Films as Carriers of Fireweed (Epilobium angustifolium L.) Extract

Author:
Dariusz Kowalczyk; Urszula Szymanowska; Tomasz Skrzypek; Monika Basiura-Cembala; Artur Bartkowiak; Katarzyna Łupina
Source:
Food and bioprocess technology 2022 v.15 no.11 pp. 2547-2561
ISSN:
1935-5130
Subject:
Epilobium angustifolium; X-ray diffraction; antioxidant activity; bioprocessing; cations; cryogels; freeze drying; gelatin; migratory behavior; polyphenols; water vapor; whey protein isolate
Abstract:
... Gelatin (GEL) and whey protein isolate (WPI) are often taken into account as carriers of phytoantioxidants for developing active packaging. The materials obtained, however, have not yet been systematically compared to demonstrate their potential benefits and drawbacks. Fireweed extract (FE) is a rich source of polyphenols with high antioxidant activity. Therefore, in this study, the structural, ph ...
DOI:
10.1007/s11947-022-02898-x

25. 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

26. Copper(II) and lead(II) adsorption onto zinc sulfide nanoparticles effects of light, pH, time, temperature, and interferences

Author:
J. M. Cantu; J. P. Valle; A. Puente; C. Valdes; K. Flores; H. M. Morales; E. Fletes; M. Alcoutlabi; E. Kotsikorou; J. G. Parsons
Source:
International journal of environmental science and technology 2022 v.19 no.8 pp. 6993-7008
ISSN:
1735-1472
Subject:
X-ray diffraction; adsorption; cations; copper; environmental science; lead; pH; temperature; thermodynamics; zinc sulfide
Abstract:
... A ZnS nano-sorbent to remove copper(II) and lead(II) ions from aqueous solutions was prepared via a hydrothermal reaction and characterized by X-ray diffraction. The zinc sulfide nanoparticle size was determined to be 7.0 ± 0.22 nm. The effects of pH, light conditions, time, capacity, and interferences on the zinc sulfide ability to remove copper(II) and lead(II) ions from aqueous solutions were i ...
DOI:
10.1007/s13762-021-03610-w

27. 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

28. Crystal structure of phenanthrenide salts stabilized by 15-crown-5 and 18-crown-6

Author:
Natalie Eichstaedt; Kasper P. van der Zwan; Lina Mayr; Renée Siegel; Jürgen Senker; Josef Breu
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 197-201
ISSN:
1865-7117
Subject:
X-ray diffraction; cations; crystal structure; ligands; nuclear magnetic resonance spectroscopy; potassium; solvents
Abstract:
... Potassium 15-crown-5 phenanthrenide and potassium 18-crown-6 phenanthrenide were synthesized and characterized by powder X-ray diffraction and ³⁹K solid state NMR spectroscopy. While the radical carbanion is very reactive in solution, the crystals are stable and storable under inert atmosphere. For 15-crown-5, a sandwich-like complex of potassium is formed with two molecules of crown ether per pot ...
DOI:
10.1515/znb-2021-0177

29. 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

30. Cu(C₂N₄H₄)₂Br₂·2H₂O: an antiferromagnetic cyanoguanidine coordination compound and its characterization

Author:
Jing Zhang; Alex J. Corkett; Jan van Leusen; Ryky Nelson; Richard Dronskowski
Source:
Zeitschrift für Naturforschung 2022 v.77 no.6 pp. 411-417
ISSN:
1865-7117
Subject:
X-ray diffraction; aqueous solutions; cations; coordination compounds; copper; ferrimagnetic materials; magnetic susceptibility; magnetism; spectroscopy
Abstract:
... Phase-pure copper(II) cyanoguanidine bromide hydrate, Cu(C₂N₄H₄)₂Br₂·2H₂O (1), was precipitated from aqueous solution and its structure was solved and refined from single-crystal X-ray diffraction data at 100 K. 1 crystallizes in space group P2₁/n with a = 12.09(3) Å, b = 3.925(9) Å, c = 13.79(3) Å, β = 96.62(6)°, Z = 2, and V = 650(2) Å³. The copper(II) cation is coordinated by two cyanoguanidine ...
DOI:
10.1515/znb-2022-0033

31. Determination of the Crystal Structures in the A-Site-Ordered YBaMn₂O₆ Perovskite

Author:
Javier Blasco; Gloria Subías; José Luis García-Muñoz; François Fauth; Joaquín García
Source:
Journal of physical chemistry 2021 v.125 no.35 pp. 19467-19480
ISSN:
1932-7455
Subject:
X-ray diffraction; cations; couplings; crystal structure; geometry; journals; magnetism; parenting; parents; phase transition
Abstract:
... We present a complete structural study of the successive phase transitions observed in the YBaMn₂O₆ compound with the layered ordering of cations on the perovskite A-site. We have combined synchrotron radiation X-ray powder diffraction and symmetry-adapted mode analysis to describe the distorted structures as pseudosymmetric with respect to the parent tetragonal structure. The YBaMn₂O₆ compound sh ...
DOI:
10.1021/acs.jpcc.1c04697

32. Effect of Cation Occupancy Ordering in Double Perovskites To Overcome Hurdles in Carrier Transport: Cs₂AgBiBr₆ as a Case Study

Author:
Abhishek Maiti; Amlan J. Pal
Source:
Journal of physical chemistry 2021 v.125 no.29 pp. 16324-16333
ISSN:
1932-7455
Subject:
Raman spectroscopy; X-ray diffraction; absorption; atomic force microscopy; case studies; cations
Abstract:
... In spite of environmental stability and toxic-free merits, the performance of double perovskite solar cells (Cs₂AgBiBr₆ to be specific) has not excelled due to their large indirect band gap, low absorption of solar spectrum, and more importantly hurdles in carrier transport processes. A large number of intrinsic defects and self-trapped excitons (STE) appear in the double perovskite due to a disor ...
DOI:
10.1021/acs.jpcc.1c04730

33. Effect of Steam Treatment on the Properties of Mordenite and Its Catalytic Performance in a DME Carbonylation Reaction

Author:
Feng Xu; Jiangang Lv; Chong Chen; Zhe Hong; Guoqing Zhao; Lei Miao; Weimin Yang; Zhirong Zhu
Source:
Industrial & engineering chemistry process design and development 2022 v.61 no.3 pp. 1258-1266
ISSN:
1520-5045
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acetates; acidity; catalysts; catalytic activity; cations; crystal structure; desorption; ion exchange; nuclear magnetic resonance spectroscopy; porosity; porous media; process design; steam; zeolites
Abstract:
... A series of dealuminated mordenite (MOR) samples with different acidities and various porosities were prepared through steam treatment of H⁺/Na⁺ mordenite. The obtained zeolites were elaborately characterized by X-ray diffraction, N₂ adsorption–desorption, scanning electron microscopy, ²⁹Si nuclear magnetic resonance (NMR), ²⁷Al NMR, NH₃ temperature-programmed desorption, and Fourier transform inf ...
DOI:
10.1021/acs.iecr.1c04184

34. 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

35. Effects of grinding media on the flotation behavior of spodumene in mixed anionic/cationic collectors system

Author:
Jinping Meng; Longhua Xu; Liping Luo; Kaiqian Shu
Source:
Colloids and surfaces 2021 v.627 pp. 127213
ISSN:
0927-7757
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; cations; energy; particle size; zeta potential
Abstract:
... Grinding, an essential pretreatment procedure before flotation, has particularly significance in spodumene flotation. The effects of grinding media on the flotation behavior of spodumene were investigated through zeta potential measurement, X-ray diffraction (XRD) test, scanning electron microscopy combined with energy dispersive spectrometry (SEM-EDS) and X-ray photoelectron spectroscopy (XPS). T ...
DOI:
10.1016/j.colsurfa.2021.127213

36. Efficient photodegradation of E124 dye using two-dimensional Zn-Co LDH: Kinetic and thermodynamic studies

Author:
Walaa R. Abd-Ellatif; Nouran G. Mahmoud; Amira A. Hashem; Maha K. El-Aiashy; Essam M. Ezzo; Sawsan A. Mahmoud
Source:
Environmental technology & innovation 2022 v.27 pp. 102393
ISSN:
2352-1864
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; activation energy; adsorption; cations; coprecipitation; electron paramagnetic resonance spectroscopy; endothermy; energy-dispersive X-ray analysis; environmental technology; nanosheets; pH; photocatalysis; photolysis; surface area; tartrazine; temperature; transmission electron microscopy
Abstract:
... Under mild conditions with a cation ratio of 1:1, Zn-Co layered double hydroxide (LDH) nanosheets were synthesized by co-precipitation. The effect of temperature on the physicochemical properties of LDH at 80, 300, and 500 ∘C was studied using x-ray diffraction (XRD), BET surface area, High resolution-Transmission electron microscopy (HR-TEM), Field Emission Scanning Electron Microscopy (FE-SEM), ...
DOI:
10.1016/j.eti.2022.102393

37. Efficient removal of 2,4-D from solution using a novel antibacterial adsorbent based on tiger nut residues: adsorption and antibacterial study

Author:
Alexander Nti Kani; Evans Dovi; Aaron Albert Aryee; Runping Han; Lingbo Qu
Source:
Environmental science and pollution research 2022 v.29 no.42 pp. 64177-64191
ISSN:
0944-1344
Subject:
2,4-D; Cyperus esculentus; Escherichia coli; Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; agricultural wastes; bacterial growth; benzene; cations; cetylpyridinium chloride; decontamination; electrostatic interactions; entropy; heat production; hydrogen; pH; pollution; research; sorption isotherms; temperature; wastewater treatment
Abstract:
... We engineered a tiger nut residue (TNR, a low-cost agricultural waste material) through a facile and simple process to take advantage of the introduced functional groups (cetylpyridinium chloride, CPC) in the removal of 2,4-dichlorophenoxyacetic acid (2,4-D) in batch mode and further investigated its impingement on bacterial growth in a yeast-dextrose broth. The surface characterizations of the ad ...
DOI:
10.1007/s11356-022-20257-3

38. Electrocatalytic and structural properties and computational calculation of PAN-EC-PC-TPAI-I₂ gel polymer electrolytes for dye sensitized solar cell application

Author:
Faisal I. Chowdhury; Jahidul Islam; A. K. Arof; M. U. Khandaker; Hossain M. Zabed; Ibrahim Khalil; M. Rezaur Rahman; Shahidul M. Islam; M. Razaul Karim; Jamal Uddin
Source:
RSC advances 2021 v.11 no.37 pp. 22937-22950
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; activation energy; carbonates; cations; dielectric spectroscopy; diffusivity; dyes; electrochemistry; ethylene; gels; iodides; polyacrylonitrile; propylene; solar cells; voltammetry
Abstract:
... In this study, gel polymer electrolytes (GPEs) were prepared using polyacrylonitrile (PAN) polymer, ethylene carbonate (EC), propylene carbonate (PC) plasticizers and different compositions of tetrapropylammonium iodide (TPAI) salt. Linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) measurements were done using non-blocking Pt-electrode symmetric cells. The limiting cu ...
DOI:
10.1039/d1ra01983j

39. 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

40. Flow photocatalysis system-based functionalized graphene oxide-ZnO nanoflowers for degradation of a natural humic acid

Author:
Ganjar Fadillah; Tawfik A. Saleh; Hanik Munawaroh; Sayekti Wahyuningsih; Ari Handono Ramelan
Source:
Environmental science and pollution research 2022 v.29 no.7 pp. 9883-9891
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; cations; graphene; humic acids; light intensity; nanoflowers; pH; photocatalysis; photocatalysts; photolysis; pollution; research; soil; spectrometers; ultraviolet-visible spectroscopy
Abstract:
... The functionalized graphene oxide-ZnO (fGO/ZnO) nanoflower composites have been studied as a photocatalyst material for flow photodegradation of humic acid (HA) in real samples. The fGO/ZnO nanoflower was prepared via hydrothermal methods. The chemical and physical properties of the synthesized photocatalyst have been carried out by several techniques, including X-ray diffraction (XRD), scanning e ...
DOI:
10.1007/s11356-021-16333-9

41. 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

42. 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

43. Impact of Orientational Glass Formation and Local Strain on Photo-Induced Halide Segregation in Hybrid Metal-Halide Perovskites

Author:
Tim W. J. van de Goor; Yun Liu; Sascha Feldmann; Sean A. Bourelle; Timo Neumann; Thomas Winkler; Nicola D. Kelly; Cheng Liu; Michael A. Jones; Steffen P. Emge; Richard H. Friend; Bartomeu Monserrat; Felix Deschler; Siân E. Dutton
Source:
Journal of physical chemistry 2021 v.125 no.27 pp. 15025-15034
ISSN:
1932-7455
Subject:
X-ray diffraction; absorption; calorimetry; cations; crystal structure; glass; lighting; photoluminescence; photostability
Abstract:
... Band gap tuning of hybrid metal–halide perovskites by halide substitution holds promise for tailored light absorption in tandem solar cells and emission in light-emitting diodes. However, the impact of halide substitution on the crystal structure and the fundamental mechanism of photo-induced halide segregation remain open questions. Here, using a combination of temperature-dependent X-ray diffrac ...
DOI:
10.1021/acs.jpcc.1c03169

44. In situ observation of metal ion interactions with graphene oxide layers: From the growth of metal hydroxide to metal oxide formation

Author:
Zhao Li; Rui Wang; Shuaijin Wu; Zhipeng Xue; Daming Zhu; Jianxin Zou; Xiaolong Li
Source:
Carbon 2021 v.184 pp. 721-727
ISSN:
0008-6223
Subject:
X-ray diffraction; aqueous solutions; cations; chlorides; graphene; graphene oxide; nanosheets; temperature
Abstract:
... The interactions between metal ions and graphene oxide (GO) nanosheets were investigated by in situ two-dimensional grazing incidence X-ray diffraction (GIXRD). We found that metal cations (Mn²⁺, Co²⁺, Cu²⁺, Fe³⁺) and GO can self-assemble into a hydroxide/GO superlattice by drop-casting a metal chloride and GO solution due to the electrostatic interactions between the positively charged hydroxide ...
DOI:
10.1016/j.carbon.2021.08.073

45. 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

46. Metal–organic framework bearing new viologen ligand for ammonia and Cr₂O₇²⁻ sensing

Author:
Baili Zhu; Yunpeng Jin; Jingying Chu; Minghui Zuo; Shuxin Cui
Source:
RSC advances 2022 v.12 no.12 pp. 6951-6957
ISSN:
2046-2069
Subject:
X-ray diffraction; ammonia; cations; color; coordination polymers; detection limit; fluorescence; ligands; photosensitivity; ultraviolet radiation; vapors; zinc
Abstract:
... Three anionic metal–organic frameworks (MOFs) {[Zn₃(BTEC)₂(H₂O)(4-BCBPY)]·(H₂O)}ₙ (1–3) (BTEC⁴⁻ = 1,2,4,5-benzenetetracarboxylic acid anion, 4-BCBPY²⁺ = 1,1′-bis(4-cyanobenzyl)-4,4′-bipyridinium dication) were synthesized in the reaction of 1,2,4,5-benzenetetracarboxylic acid with different metal salts such as ZnNO₃, ZnCl₂, and ZnSO₄, under solvothermal conditions in the presence of 1,1′-bis(4-cya ...
DOI:
10.1039/d2ra00599a

47. Modulation of a μ-1,2-Peroxo Dicopper(II) Intermediate by Strong Interaction with Alkali Metal Ions

Author:
Alexander Brinkmeier; Kristian E. Dalle; Lorenzo D’Amore; Roland A. Schulz; Sebastian Dechert; Serhiy Demeshko; Marcel Swart; Franc Meyer
Source:
Journal of the American Chemical Society 2021 v.143 no.42 pp. 17751-17760
ISSN:
1520-5126
Subject:
X-ray diffraction; acidity; catalytic activity; cations; copper; electrochemistry; magnetism; oxidation; oxygen
Abstract:
... The properties of metal/dioxygen species, which are key intermediates in oxidation catalysis, can be modulated by interaction with redox-inactive Lewis acids, but structural information about these adducts is scarce. Here we demonstrate that even mildly Lewis acidic alkali metal ions, which are typically viewed as innocent “spectators”, bind strongly to a reactive cis-peroxo dicopper(II) intermedi ...
DOI:
10.1021/jacs.1c08645

48. Multi-scale chemo-mechanical evolution during crystallization of mixed conducting SrTi₀.₆₅Fe₀.₃₅O₃₋δ films and correlation to electrical conductivity

Author:
Haley B. Buckner; Qing Ma; Joshua Simpson-Gomez; Emily J. Skiba; Nicola H. Perry
Source:
Journal of materials chemistry A 2022 v.10 no.5 pp. 2421-2433
ISSN:
2050-7496
Subject:
X-ray absorption spectroscopy; X-ray diffraction; cations; crystal structure; crystallization; dielectric spectroscopy; electrical conductivity; oxidation; oxygen; temperature; transmission electron microscopy
Abstract:
... Recent work has demonstrated a low-temperature route to fabricating mixed ionic/electronic conducting (MIEC) thin films with enhanced oxygen exchange kinetics by crystallizing amorphous-grown thin films under mild temperatures, eluding conditions for deleterious A-site cation surface segregation. Yet, the complex, multiscale chemical and structural changes during MIEC crystallization and their imp ...
DOI:
10.1039/d1ta06455j

49. Multifunctional Two-Dimensional Metal–Organic Frameworks for Radionuclide Sequestration and Detection

Author:
Robert G. Surbella; Dallas D. Reilly; Michael A. Sinnwell; Bruce K. McNamara; Lucas E. Sweet; Jon M. Schwantes; Praveen K. Thallapally
Source:
ACS applied materials & interfaces 2021 v.13 no.38 pp. 45696-45707
ISSN:
1944-8252
Subject:
X-radiation; X-ray diffraction; absorbance; adsorption; cations; color; crystal structure; fluorescence; irradiation; ligands; pH; surface area; thermal stability; uranyl ions
Abstract:
... Two lanthanide-containing porous coordination polymers, [Ln₂(bpdc)₆(phen)₂]·nH₂O (1) and [Ln₂(bpdc)₆(terpy)₂]·3H₂O (2) (Ln = Pr, Nd, or Sm–Dy; bpdc: 2,2′-bipyridine-5,5′-dicarboxylic acid; phen: 1,10-phenanthroline; and terpy: 2,2′:6′,2″-terpyridine), have been hydrothermally synthesized and structurally characterized by powder and single-crystal X-ray diffraction. Crystallographic analyses reveal ...
DOI:
10.1021/acsami.1c11018

50. Near-unity blue-orange dual-emitting Mn-doped perovskite nanocrystals with metal alloying for efficient white light-emitting diodes

Author:
Sihang Ji; Xi Yuan; Jinju Zheng; Sheng Cao; Wenyu Ji; Haibo Li; Jialong Zhao; Hanzhuang Zhang
Source:
Journal of colloid and interface science 2021 v.603 pp. 864-873
ISSN:
0021-9797
Subject:
X-ray diffraction; ambient temperature; cations; color; energy transfer; nanocrystals; photoluminescence
Abstract:
... The tunable dual-color emitting Mn²⁺ doped CsPbCl₃₋ₓBrₓ nanocrystals (NCs) with near-unity photoluminescence quantum yield (PL QY) were synthesized through post-treatment of metal bromide at room temperature for fabrication of efficient warm white light-emitting diodes (WLEDs). Especially, the CdBr₂ treated blue-orange emitting Mn doped NCs with various Mn/Pb molar feed ratios exhibit higher PL QY ...
DOI:
10.1016/j.jcis.2021.06.138

51. 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

52. On iodido bismuthates, bismuth complexes and polyiodides with bismuth in the system BiI₃/18-crown-6/I₂

Author:
Silke Notter; Carsten Donsbach; Claus Feldmann
Source:
Zeitschrift für Naturforschung 2021 v.76 no.10-12 pp. 765-774
ISSN:
1865-7117
Subject:
X-ray diffraction; bismuth; cations; infrared spectroscopy; ionic liquids; ligands; synthesis; temperature; triethylene glycol
Abstract:
... The iodido bismuthates [Bi(18-crown-6)I₂][BiI₄] (1) and [Bi(18-crown-6)I₂][Bi₃I₁₀] (2), the neutral complex [Bi(C₆H₁₄O₄)I₃](18-crown-6) (3) as well as the polyiodides [Bi(18-crown-6)I₂][I₅](18-crown-6) (4), [Bi(18-crown-6)I₂]₂[I₁₄] (5) and [Bi(18-crown-6)I₂]₂[I₁₉] (6) were prepared by reaction of BiI₃, 18-crown-6, and I₂ at T = 60–120 °C. The compounds 1–5 were prepared in [n-Bu₃MeN][N(Tf)₂] as an ...
DOI:
10.1515/znb-2021-0127

53. On the electrochemical properties of the Fe–Ti doped LNMO material LiNi₀.₅Mn₁.₃₇Fe₀.₁Ti₀.₀₃O₃.₉₅

Author:
Pirmin Stüble; Holger Geßwein; Sylvio Indris; Marcus Müller; Joachim R. Binder
Source:
Journal of materials chemistry A 2022 v.10 no.16 pp. 9010-9024
ISSN:
2050-7496
Subject:
Raman spectroscopy; X-ray diffraction; cathodes; cations; cobalt; commercialization; cost effectiveness; electric potential difference; electrochemistry; energy density; graphene; lithium; nickel; oxygen; particle size
Abstract:
... LiNi₀.₅Mn₁.₅O₄ (LNMO) based spinel cathode materials for lithium-ion batteries are promising alternatives to widely used mixed transition-metal layered Li(Ni,Co,Mn)O₂ (NCM) oxides. LNMO is cobalt free and thus cost efficient, while providing a high operating voltage of 4.7 V (vs. Li/Li⁺) and remarkable energy density of ∼650 W h kg⁻¹. Commercialization and large-scale application however are still ...
DOI:
10.1039/d2ta00299j

54. Operando X-ray Diffraction Studies of the Mg-Ion Migration Mechanisms in Spinel Cathodes for Rechargeable Mg-Ion Batteries

Author:
Liang Yin; Bob Jin Kwon; Yunyeong Choi; Christopher J. Bartel; Mengxi Yang; Chen Liao; Baris Key; Gerbrand Ceder; Saul H. Lapidus
Source:
Journal of the American Chemical Society 2021 v.143 no.28 pp. 10649-10658
ISSN:
1520-5126
Subject:
X-ray diffraction; activated carbon; anodes; batteries; cathodes; cations; density functional theory; electric potential difference; hysteresis
Abstract:
... A promising high-voltage spinel oxide cathode material MgCrMnO₄ with 18% Mg/Mn inversion was synthesized successfully. A new custom operando battery device was designed to study the cation migration mechanisms of the MgCrMnO₄ cathode using 0.1 M Mg(TPFA)₂ electrolyte dissolved in triglyme and activated carbon as the anode. For the first time in multivalent batteries, high-quality operando diffract ...
DOI:
10.1021/jacs.1c04098

55. Ordered LiGa5O8 loaded with redox capable Cu2+, Cr3+ ions to manifest interesting optical, magnetic, and catalytic properties

Author:
Priyanka Yadav; Shrishti Uniyal; Sitharaman Uma; Rajamani Nagarajan
Source:
Journal of materials science 2021 v.56 no.36 pp. 20111-20125
ISSN:
0022-2461
Subject:
X-ray diffraction; cations; crystal structure; dyes; electron paramagnetic resonance spectroscopy; ferrimagnetic materials; heat; magnetism; nitroaromatic compounds; oxidation; phase transition; photolysis; temperature; transmission electron microscopy; xerogels
Abstract:
... The crystal structure and associated property changes brought about by substituting Cu²⁺ and Cr³⁺ ions for Li⁺ and Ga³⁺ ions, respectively, in ordered LiGa₅O₈ are probed in the present work. The samples were synthesized by a single-step calcination process of epoxide-mediated xerogels rapidly and characterized extensively. Powder X-ray diffraction patterns revealed the preservation of the superstr ...
DOI:
10.1007/s10853-021-06572-z

56. Oxygen Availability in ZnₓCe₁–ₓO₂ Nanocrystallites as a Function of Zinc Concentration

Author:
Kshitij Gurung; Travis H. James; Angel Torres; Alexander Sinitskii; Marjorie A. Langell
Source:
Journal of physical chemistry 2021 v.125 no.42 pp. 23071-23084
ISSN:
1932-7455
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; carbon dioxide; carbonates; cations; ceric oxide; desorption; formates; methanol; nanocrystallites; oxidation; oxygen; stoichiometry; zinc
Abstract:
... Oxygen availability, an important property of cerium oxide catalysts, has been investigated over a wide range of concentrations for the substitutional solid solution ZnₓCe₁–ₓO₂ in nanocrystalline (∼2.5 nm) form. X-ray diffraction data of the as-synthesized materials indicates ZnₓCe₁–ₓO₂ to be a single-phase system up to approximately x = 0.16, with the lattice parameter decreasing linearly with zi ...
DOI:
10.1021/acs.jpcc.1c04465

57. Perovskite-like K₃TiOF₅ Exhibits (3 + 1)-Dimensional Commensurate Structure Induced by Octahedrally Coordinated Potassium Ions

Author:
Fenghua Ding; Nenian Charles; Jaye K. Harada; Christos D. Malliakas; Chi Zhang; Roberto dos Reis; Kent J. Griffith; Matthew L. Nisbet; Weiguo Zhang; P. Shiv Halasyamani; Vinayak P. Dravid; James M. Rondinelli; Kenneth R. Poeppelmeier
Source:
Journal of the American Chemical Society 2021 v.143 no.45 pp. 18907-18916
ISSN:
1520-5126
Subject:
X-ray diffraction; cations; fluorine; potassium; prototypes; topology
Abstract:
... Elpasolite- and cryolite-type oxyfluorides can be regarded as superstructures of perovskite and exhibit structural diversity. While maintaining a similar structural topology with the prototype structures, changes in the size, electronegativity, and charge of cation and/or anion inevitably lead to structural evolution. Therefore, the nominal one-to-one relation suggested by a doubled formula of per ...
DOI:
10.1021/jacs.1c05704

58. Photoinduced Cascading Charge Transfer in Perylene Bisimide-Based Triads

Author:
Hao Loong; Jiadong Zhou; Nianqiang Jiang; Yi Feng; Guojing Xie; Linlin Liu; Zengqi Xie
Source:
Journal of physical chemistry 2022 v.126 no.12 pp. 2441-2448
ISSN:
1520-5207
Subject:
X-ray diffraction; cations; electrochemistry; methylene chloride; physical chemistry
Abstract:
... We synthesize three perylene bisimide-based triads with donor–acceptor–acceptor (D∼A₁–A₂) architectures, in which the distance between D and A₁ is varied to study its influence on the excited state electron processes. Very different intramolecular charge transfer (D⁺∼A₁–A₂–) lifetimes in dichloromethane (DCM) for these three triads are revealed by steady-state and transient spectroscopies. Free-en ...
DOI:
10.1021/acs.jpcb.2c00965

59. 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

60. Room-Temperature Magnetic Bistability in a Salt of Organic Radical Ions

Author:
Anni I. Taponen; Awatef Ayadi; Manu K. Lahtinen; Itziar Oyarzabal; Sébastien Bonhommeau; Mathieu Rouzières; Corine Mathonière; Heikki M. Tuononen; Rodolphe Clérac; Aaron Mailman
Source:
Journal of the American Chemical Society 2021 v.143 no.39 pp. 15912-15917
ISSN:
1520-5126
Subject:
X-ray diffraction; acetonitrile; ambient temperature; cations; magnetic susceptibility; magnetism; phase transition; solvents
Abstract:
... Cocrystallization of 7,7′,8,8′-tetracyanoquinodimethane radical anion (TCNQ–•) and 3-methylpyridinium-1,2,3,5-dithiadiazolyl radical cation (3-MepyDTDA⁺•) afforded isostructural acetonitrile (MeCN) or propionitrile (EtCN) solvates containing cofacial π dimers of homologous components. Loss of lattice solvent from the diamagnetic solvates above 366 K affords a high-temperature paramagnetic phase co ...
DOI:
10.1021/jacs.1c07468

61. S = 1/2 tetracene monoradical cation/anion: ion-based one-dimensional antiferromagnetic chains

Author:
Wenqing Wang; Shunjie Li; Qianqian Wang; Xuguang Ding; Yong Fang; Huapeng Ruan; Yue Zhao; Xinping Wang
Source:
Chemical communications 2022 v.58 no.64 pp. 8962-8965
ISSN:
1364-548X
Subject:
X-ray diffraction; cations; ferrimagnetic materials; oxidation; polymers; van der Waals forces
Abstract:
... The monoradical cation 1˙⁺ and anion 1˙⁻ based on tetracene were generated by one-electron oxidation and one-electron reduction of the bulky tetracene (1), respectively, which contain the largest π-fused skeletons reported to date. For monoradical species, 1˙⁺ and 1˙⁻, EPR spectra and DFT calculation results indicate the spin density delocalized over the whole molecules. Notably, in the solid stat ...
DOI:
10.1039/d2cc02084j

62. Salts of octabismuth(2+) polycations crystallized from Lewis-acidic ionic liquids

Author:
Maximilian Knies; Michael Ruck
Source:
Zeitschrift für Naturforschung 2021 v.76 no.10-12 pp. 585-589
ISSN:
1865-7117
Subject:
X-ray diffraction; ambient temperature; cations; chlorides; cooling; crystal structure; ionic liquids
Abstract:
... The reaction of Bi and BiCl₃ with RbCl or CsCl in the Lewis-acidic ionic liquid (IL) [BMIm]Cl·4AlCl₃ at T = 200 °C yielded air-sensitive, shiny black crystals. X-ray diffraction on single crystals revealed the hexagonal structures of two new salts (Bi₈)M[AlCl₄]₃ (M = Rb, Cs), which are isostructural to the high-temperature form of (Bi₈)Tl[AlCl₄]₃. The known (Bi₈)²⁺ polycation is a square antiprism ...
DOI:
10.1515/znb-2021-0042

63. Stacking Faults Assist Lithium-Ion Conduction in a Halide-Based Superionic Conductor

Author:
Elias Sebti; Hayden A. Evans; Hengning Chen; Peter M. Richardson; Kelly M. White; Raynald Giovine; Krishna Prasad Koirala; Yaobin Xu; Eliovardo Gonzalez-Correa; Chongmin Wang; Craig M. Brown; Anthony K. Cheetham; Pieremanuele Canepa; Raphaële J. Clément
Source:
Journal of the American Chemical Society 2022 v.144 no.13 pp. 5795-5811
ISSN:
1520-5126
Subject:
X-ray diffraction; cations; density functional theory; dielectric spectroscopy; electric vehicles; electronics; energy; heat; neutron diffraction; nuclear magnetic resonance spectroscopy; temperature; transmission electron microscopy
Abstract:
... In the pursuit of urgently needed, energy dense solid-state batteries for electric vehicle and portable electronics applications, halide solid electrolytes offer a promising path forward with exceptional compatibility against high-voltage oxide electrodes, tunable ionic conductivities, and facile processing. For this family of compounds, synthesis protocols strongly affect cation site disorder and ...
DOI:
10.1021/jacs.1c11335

64. Sulfated Zirconium Metal–Organic Frameworks as Well-Defined Supports for Enhancing Organometallic Catalysis

Author:
Zoha H. Syed; Mohammad Rasel Mian; Roshan Patel; Haomiao Xie; Zihan Pengmei; Zhihengyu Chen; Florencia A. Son; Timothy A. Goetjen; Alon Chapovetsky; Kira M. Fahy; Fanrui Sha; Xingjie Wang; Selim Alayoglu; David M. Kaphan; Karena W. Chapman; Matthew Neurock; Laura Gagliardi; Massimiliano Delferro; Omar K. Farha
Source:
Journal of the American Chemical Society 2022 v.144 no.37 pp. 16883-16897
ISSN:
1520-5126
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acidity; ammonia; catalysts; catalytic activity; cations; crystal structure; density functional theory; geometry; ligands; porosity; sorption; stoichiometry; sulfates; toluene; zirconium
Abstract:
... Understanding heterogeneous catalysts is a challenging pursuit due to surface site nonuniformity and aperiodicity in traditionally used materials. One example is sulfated metal oxides, which function as highly active catalysts and as supports for organometallic complexes. These applications are due to traits such as acidity, ability to act as a weakly coordinating ligand, and aptitude for promotin ...
DOI:
10.1021/jacs.2c05290

65. Thermodynamic and Kinetic Aspects of Formamidinium Lead Iodide Thermal Decomposition

Author:
Alessio Luongo; Bruno Brunetti; Stefano Vecchio Ciprioti; Andrea Ciccioli; Alessandro Latini
Source:
Journal of physical chemistry 2021 v.125 no.40 pp. 21851-21861
ISSN:
1932-7455
Subject:
X-ray diffraction; acidity; activation energy; cations; enthalpy; iodides; lead; physical chemistry; thermal degradation; thermal stability
Abstract:
... We report the results of a multi-technique study on the thermodynamics and kinetics of formamidinium lead iodide (FAPI) thermal decomposition. Thermodynamics was investigated by means of Knudsen effusion techniques. Kinetics was studied either by temperature-controlled powder X-ray diffraction or by two isoconversional treatments of differential scanning calorimetry data. FAPI appears to be much m ...
DOI:
10.1021/acs.jpcc.1c06729

66. Thick-Layer Lead Iodide Perovskites with Bifunctional Organic Spacers Allylammonium and Iodopropylammonium Exhibiting Trap-State Emission

Author:
Eugenia S. Vasileiadou; Xinyi Jiang; Mikaël Kepenekian; Jacky Even; Michael C. De Siena; Vladislav V. Klepov; Daniel Friedrich; Ioannis Spanopoulos; Qing Tu; Imra S. Tajuddin; Emily A. Weiss; Mercouri G. Kanatzidis
Source:
Journal of the American Chemical Society 2022 v.144 no.14 pp. 6390-6409
ISSN:
1520-5126
Subject:
X-ray diffraction; absorption; cations; crystallization; iodides; iodine; lead; photoluminescence; spectroscopy
Abstract:
... The nature of the organic cation in two-dimensional (2D) hybrid lead iodide perovskites tailors the structural and technological features of the resultant material. Herein, we present three new homologous series of (100) lead iodide perovskites with the organic cations allylammonium (AA) containing an unsaturated C═C group and iodopropylammonium (IdPA) containing iodine on the organic chain: (AA)₂ ...
DOI:
10.1021/jacs.2c00571

67. 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

68. Ultrafast Synthesis of High Entropy Oxide Nanoparticles by Flame Spray Pyrolysis

Author:
Abhijit H. Phakatkar; Mahmoud Tamadoni Saray; Md Golam Rasul; Lioudmila V. Sorokina; Timothy G. Ritter; Tolou Shokuhfar; Reza Shahbazian-Yassar
Source:
Langmuir 2021 v.37 no.30 pp. 9059-9068
ISSN:
1520-5827
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; cations; crystal structure; energy-dispersive X-ray analysis; entropy; oxidation; pyrolysis; transmission electron microscopy
Abstract:
... The synthesis of high entropy oxide (HEO) nanoparticles (NPs) possesses many challenges in terms of process complexity and cost, scalability, tailoring nanoparticle morphology, and rapid synthesis. Herein, we report the synthesis of novel single-phase solid solution (Mn, Fe, Ni, Cu, Zn)₃(O)₄ quinary HEO NPs produced by a flame spray pyrolysis route. The aberration-corrected scanning transmission e ...
DOI:
10.1021/acs.langmuir.1c01105

69. Ultrasound-assisted synthesis of europium doped BPO4 nanoparticles; a new approach for Zn2+ (aq) detection

Author:
Mana Ayari; Ali Banitalebi Dehkordi; Ghodsi Mohammadi Ziarani; Jahan B. Ghasemi; Mohammad Reza Ganjali; Meisam Soleimani; Alireza Badiei; Elena Niculina Dragoi; Hassan Rokni
Source:
Food and chemical toxicology 2022 v.168 pp. 113373
ISSN:
0278-6915
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aqueous solutions; boron; calcium; cations; europium; fluorescence; phosphates; photoluminescence; toxicology; transmission electron microscopy; ultrasonic treatment
Abstract:
... In this work, europium ion was doped into boron phosphate nanoparticles (BPO₄) using an ultrasonic method followed by the calcination process. The nanoparticles were characterized by various techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence spectroscopy, transmission electron microscopy (TEM), and Fourier-transform infrared spectroscopy (FT-IR), ...
DOI:
10.1016/j.fct.2022.113373

70. 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

71. X-ray diffraction and thermoanalytical datasets of precursors of the Gd6UO12-δ phase processed by combined mechanochemical−thermal routes

Author:
Gaspar Darin; Kengo Imakuma; Rafael Trautwein Santiago; Klebson Lucenildo Da Silva; Luiz Fernardo Cótica; Martin Fabián; Jan Valíček; Horst Hahn; Vladimír Šepelák
Source:
Data in Brief 2021 v.35 pp. 106972
ISSN:
2352-3409
Subject:
X-ray diffraction; air; cations; complement; data collection; differential thermal analysis; heat; stoichiometry; thermogravimetry
Abstract:
... The datasets presented here are related to the research paper entitled “Disordered Gd₆UO₁₂₋δwith the cation antisite defects prepared by a combined mechanochemical−thermal method”[1]. The datasets complement the findings [1] on the effect of the combined mechanochemical−thermal processing of the stoichiometric mixture of solid precursors (3Gd₂O₃ + UO₂) on the formation of Gd₆UO₁₂₋δ phase. In this ...
DOI:
10.1016/j.dib.2021.106972

72. 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

73. 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

74. 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

75. Adsorption of 177Lu from Water by Using Synthetic Hydroxyapatite

Author:
Melania Jiménez-Reyes; Perla Tatiana Almazán-Sánchez; Jaime Jiménez-Becerril; Marcos Solache-Ríos
Source:
Water, air, and soil pollution 2021 v.232 no.10 pp. 394
ISSN:
0049-6979
Subject:
Gibbs free energy; X-ray diffraction; adsorbents; adsorption; air; cations; enthalpy; entropy; heat production; hydroxyapatite; lutetium; pH; soil pollution; temperature; water
Abstract:
... Adsorption behavior of lutetium by hydroxyapatite (HAP) was investigated by considering pH, adsorbent dose, contact time, initial concentration of lutetium, and temperature. The adsorbent was synthesized and characterized by X-ray diffraction (XRD; JCPDS file 01–04-3708), and the point of zero charge was 7.22. When the initial pH (pHᵢ) was 3, the final pH (pHf) of the system was approximately 6, a ...
DOI:
10.1007/s11270-021-05339-1

76. 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

77. 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

78. Cation and Anion Transfer in Quinuclidinium Hexafluorophosphate Plastic Crystal: Role of Constituent Ions and the Crystalline Structure

Author:
Xue Lan; Xin Wang; Dong Xue Zhang; Tiancheng Mu; Xiao Zheng Lan
Source:
Journal of physical chemistry 2021 v.125 no.38 pp. 21169-21178
ISSN:
1932-7455
Subject:
X-ray diffraction; cations; chlorides; crystal structure; lithium
Abstract:
... This research demonstrates the cation and anion transfer of an organic ionic plastic crystal (OIPC), quinuclidinium hexafluorophosphate ([HQ]PF₆), in the pure state and mixtures doped with lithium or chloride ions. The pure material and the mixtures show relatively simple thermal behaviors. Powder X-ray diffraction determined a cubic crystal structure, a common feature of OIPCs, in the high-temper ...
DOI:
10.1021/acs.jpcc.1c05891

79. Competing H₂ versus Intramolecular C–H Activation at a Dinuclear Nickel Complex via Metal–Metal Cooperative Oxidative Addition

Author:
Hendrik Stevens; Peng-Cheng Duan; Sebastian Dechert; Franc Meyer
Source:
Journal of the American Chemical Society 2020 v.142 no.14 pp. 6717-6728
ISSN:
1520-5126
Subject:
X-ray diffraction; benzaldehyde; byproducts; carbon-hydrogen bond activation; catalytic activity; cations; chemical bonding; hydrides; hydrogen; ligands; moieties; nickel; nuclear magnetic resonance spectroscopy; reducing agents; titration
Abstract:
... Nickel(I) metalloradicals bear great potential for the reductive activation of challenging substrates but are often too unstable to be isolated. Similar chemistry may be enabled by nickel(II) hydrides that store the reducing equivalents in hydride bonds and reductively eliminate H₂ upon substrate binding. Here we present a pyrazolate-based bis(β-diketiminato) ligand [Lᴾʰ]³– with bulky m-terphenyl ...
DOI:
10.1021/jacs.0c00758

80. 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

81. 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

82. Crystal structure, magneto-structural correlation, thermal and electrical studies of an imidazolium halometallate molten salt: (trimim)[FeCl₄]

Author:
Palmerina González-Izquierdo; Oscar Fabelo; Garikoitz Beobide; Israel Cano; Idoia Ruiz de Larramendi; Oriol Vallcorba; Jesús Rodríguez Fernández; María Teresa Fernández-Díaz; Imanol de Pedro
Source:
RSC advances 2020 v.10 no.19 pp. 11200-11209
ISSN:
2046-2069
Subject:
X-ray diffraction; ambient temperature; cations; crystal structure; dielectric spectroscopy; ferrimagnetic materials; ferromagnetism; heat; imidazoles; neutron diffraction; phase transition; physicochemical properties; thermal expansion
Abstract:
... A novel imidazolium halometallate molten salt with formula (trimim)[FeCl₄] (trimim: 1,2,3-trimethylimidazolium) was synthetized and studied with structural and physico-chemical characterization. Variable-temperature synchrotron X-ray powder diffraction (SXPD) from 100 to 400 K revealed two structural transitions at 200 and 300 K. Three different crystal structures were determined combining single ...
DOI:
10.1039/d0ra00245c

83. Degradation Mechanism of Silver Metal Deposited on Lead Halide Perovskites

Author:
Sebastian Svanström; T. Jesper Jacobsson; Gerrit Boschloo; Erik M. J. Johansson; Håkan Rensmo; Ute B. Cappel
Source:
ACS applied materials & interfaces 2020 v.12 no.6 pp. 7212-7221
ISSN:
1944-8252
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; cations; cesium; electrodes; gases; lead; models; scanning electron microscopy; silver; solar cells; ultraviolet-visible spectroscopy
Abstract:
... Lead halide perovskite solar cells have significantly increased in both efficiency and stability over the last decade. An important aspect of their long-term stability is the reaction between the perovskite and other materials in the solar cell. This includes the contact materials and their degradation if they can potentially come into contact through, e.g., pinholes or material diffusion and migr ...
DOI:
10.1021/acsami.9b20315

84. 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

85. Effect of non-stoichiometry on the microstructure and microwave dielectric properties of Ca5Mg4+xV6O24 (− 0.05 ≤ x ≤ 0.15) ceramics

Author:
Bo Li; Wei Liu; Hansheng Leng
Source:
Journal of materials science 2020 v.55 no.9 pp. 3795-3802
ISSN:
0022-2461
Subject:
Raman spectroscopy; X-ray diffraction; cations; ceramics; dielectric properties; energy; magnesium; microstructure; temperature
Abstract:
... Ca₅Mg₄₊ₓV₆O₂₄ (− 0.05 ≤ x ≤ 0.15) ceramics were prepared via a conventional solid-state reaction route. XRD patterns and Raman spectra confirmed that a single garnet phase was formed in all samples. The full-width-at-half maximum of Raman peaks revealed that an appropriate excess of magnesium ions improves the ordering degree of cations and quality factor (Q × f) value. The dielectric constant (εᵣ ...
DOI:
10.1007/s10853-019-04287-w

86. Effect of the Large-Size A-Site Cation on the Crystal Growth and Phase Distribution of 2D/3D Mixed Perovskite Films via a Low-Pressure Vapor-Assisted Solution Process

Author:
Yu-An Chen; Hung-Wei Shiu; Yao-Jane Hsu; Laura E. Mundt; Wei-Ting Hung; Takuji Ohigashi; Ming-Hsien Li; Peter Chen
Source:
Journal of physical chemistry 2021 v.125 no.48 pp. 26601-26612
ISSN:
1932-7455
Subject:
X-radiation; X-ray diffraction; atomic force microscopy; cations; crystal structure; energy; iodides; lead; methylamine; photoluminescence; vapors; wide-angle X-ray scattering
Abstract:
... In this study, various concentrations of the large-sized cation iodide, namely, phenylethylammonium iodide (PEAI), incorporated in lead iodide (PbI₂) solid films react with heated methylammonium iodide (MAI) to fabricate 2D/3D mixed perovskite films with vertical phase distribution, which are prepared by the low-pressure vapor-assisted solution process (LP-VASP). The 2D/3D mixed perovskite films e ...
DOI:
10.1021/acs.jpcc.1c07795

87. 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

88. 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

89. 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

90. 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

91. Electrochemically Driven Specific Alkaline Metal Cation Adsorption on a Graphene Interface

Author:
Satoshi Yasuda; Kazuhisa Tamura; Masaru Kato; Hidehito Asaoka; Ichizo Yagi
Source:
Journal of physical chemistry 2021 v.125 no.40 pp. 22154-22162
ISSN:
1932-7455
Subject:
X-ray diffraction; adsorption; cations; desorption; electrochemistry; graphene; mechanical stress; metal ions; spectroscopy; voltammetry
Abstract:
... Understanding electrochemical behavior of the alkaline metal cation–graphene interface in electrolyte is essential for understanding the fundamental electrochemical interface and development of graphene-based technologies. However, most studies have been mainly conducted based on typical electrochemical analysis and computational evaluation, and the fundamental properties of both cations and graph ...
DOI:
10.1021/acs.jpcc.1c03322

92. 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

93. Enhanced Monovalent Cation Biomineralization Ability by Quartz Sand for Effective Removal of Soluble Iron in Simulated Acid Mine Drainage

Author:
Heru Wang; Mengying Li; Yongwei Song
Source:
Water 2020 v.12 no.3 pp. -
ISSN:
2073-4441
Subject:
Acidithiobacillus ferrooxidans; X-ray diffraction; acid mine drainage; biomineralization; cations; heavy metals; iron; jarosite; neutralization; oxidation; pH; quartz; sand; water; yields
Abstract:
... Acid mine drainage (AMD) is characterized by low pH, high soluble Fe, and heavy metal concentrations. Conventional lime neutralization produces large amounts of Fe(OH)₂ and Fe(OH)₃, which complicate subsequent disposal. Secondary iron minerals synthesized by biomineralization can reduce the concentration of soluble Fe in addition to adsorbing and removing heavy metals in AMD. Therefore, an appropr ...
DOI:
10.3390/w12030732

94. Enhanced catalytic performance of cobalt and iron co-doped ceria catalysts for soot combustion

Author:
Yibo Gao; Shichang Teng; Zhongpeng Wang; Baoqin Wang; Wei Liu; Wenxu Liu; Liguo Wang
Source:
Journal of materials science 2020 v.55 no.1 pp. 283-297
ISSN:
0022-2461
Subject:
Raman spectroscopy; X-ray diffraction; adsorption; catalysts; catalytic activity; cations; ceric oxide; cerium; cobalt; combustion; coprecipitation; iron; nitric oxide; nitrogen; nitrogen dioxide; oxygen; scanning electron microscopes; solid solutions; soot; surface area
Abstract:
... A series of promising Ce–Co–Fe catalysts were successfully synthesized using a cetyl-trimethylammonium-bromide-assisted co-precipitation method and investigated for diesel soot combustion. The surface morphological and structural properties were systematically examined using various techniques: X-ray diffraction, scanning electron microscope, N₂ adsorption–desorption, Raman spectroscopy, temperatu ...
DOI:
10.1007/s10853-019-03973-z

95. 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

96. Enhancing the Cycling Stability of Ni-Rich LiNi₀.₆Co₀.₂Mn₀.₂O₂ Cathode at a High Cutoff Voltage with Ta Doping

Author:
Binbin Chu; Siyang Liu; Longzhen You; Da Liu; Tao Huang; Yangxing Li; Aishui Yu
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.8 pp. 3082-3090
ISSN:
2168-0485
Subject:
X-ray diffraction; cathodes; cations; commercialization; dielectric spectroscopy; dissociation; electric potential difference; mixing; temperature
Abstract:
... Ni-rich cathode materials have attracted wide attention on account of their high specific capacity. However, the poor cycle retention of Ni-rich cathode materials, especially at high voltage or high temperature, is recognized as the main obstacle for extensive commercialization. In this research, we propose a new strategy of doping NCM622 (LiNi₀.₆Co₀.₂Mn₀.₂O₂) with Ta⁵⁺ to improve the structural s ...
DOI:
10.1021/acssuschemeng.9b05560

97. Enriched Photophysical Properties and Thermal Stability of Tin(II) Substituted Lead-Based Perovskite Nanocrystals with Mixed Organic–Inorganic Cations

Author:
Premkumar Selvarajan; Kaushik Kundu; C. I. Sathish; Siva Umapathy; Ajayan Vinu
Source:
Journal of physical chemistry 2020 v.124 no.17 pp. 9611-9621
ISSN:
1932-7455
Subject:
X-ray diffraction; ambient temperature; cations; cesium; crystal structure; electronic equipment; lead; nanocrystals; optical properties; oxidation; photoluminescence; spectral analysis; thermal stability; tin; toxicity
Abstract:
... In order to overcome the toxicity and long-term stability of hybrid organic/inorganic Pb-based halide perovskites, which are believed to be the key obstacles for their utilization in optoelectronic devices, herein we explored the synthesis of binary Pb–Sn perovskite nanocrystals (NCs) with fixed composition of methylammonium (MA) and cesium (Cs) cations. Mixed MA-Cs composition has been used to ac ...
DOI:
10.1021/acs.jpcc.0c02223

98. 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

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. 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