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You searched for: Subject anions Remove constraint Subject: anions Subject X-ray diffraction Remove constraint Subject: X-ray diffraction
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1. Highly Stable Polyoxovanadate-Based Zn–MOF with Dual Active Sites as a Solvent-free Catalyst for C–C Bond Formation

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

2. A Tetraindeno-Fused Bis(anthraoxa)quinodimethane with Nine Consecutively Fused Six-Membered Rings

Author:
Johnathan Joo Cheng Lee; Shaoqiang Dong; Albert Ong; Yi Han; Jishan Wu; Chunyan Chi
Source:
Organic letters 2021 v.23 no.8 pp. 3027-3031
ISSN:
1523-7052
Subject:
X-ray diffraction; anions; photostability
Abstract:
... A tetraindeno-fused bis(anthraoxa)quinodimethane RBR with nine consecutively fused six-membered rings in a row was synthesized. Its structure was confirmed by X-ray crystallographic analysis and NMR measurement. Compared with an unfused analogue ABA, the indeno fusion onto the zigzag edges not only enhanced the photostability but also dramatically tuned the electronic properties. Due to the existe ...
DOI:
10.1021/acs.orglett.1c00705

3. Adsorption of low concentrations of bromide ions from water by cellulose-based beads modified with TEMPO-mediated oxidation and Fe(III) complexation

Author:
Shengpeng Liu; Gen Cheng; Yun Xiong; Yigang Ding; Xiaogang Luo
Source:
Journal of hazardous materials 2020 v.384 pp. 121195
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acidity; adsorbents; adsorption; anions; aqueous solutions; bromides; carboxylation; cellulose; electrostatic interactions; energy; energy-dispersive X-ray analysis; heat production; iron; kinetics; models; oxidation; scanning electron microscopy; thermogravimetry; wastewater
Abstract:
... Due to strong activity, it is very difficult to remove low concentrations of bromide in medical wastewater by traditional method, thus highly effective and greener adsorbents should be utilized to design. In this work, the cellulose beads (CBs) were modified by the TEMPO-mediated oxidation and then bonded with Fe³⁺ to fabricate Fe(III)-complexed carboxylated cellulose beads (Fe-CCBs) adsorbents. S ...
DOI:
10.1016/j.jhazmat.2019.121195

4. Application of ZnO nanorods doped with Cu for enhanced sonocatalytic removal of Cr(VI) from aqueous solutions

Author:
Kazem Godini; Mahsa Tahergorabi; Mohammad Naimi-Joubani; Mehdi Shirzad-Siboni; Jae-Kyu Yang
Source:
Environmental science and pollution research international 2020 v.27 no.3 pp. 2691-2706
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; aqueous solutions; catalysts; chromium; citric acid; copper; coprecipitation; electric power; electroplating; energy-dispersive X-ray analysis; hydrogen peroxide; nanorods; pH; scanning electron microscopy; sonocatalysis; ultrasonics; wastewater; zinc oxide
Abstract:
... The aim of this research was to develop a simple and inexpensive process for reduction of Cr(VI) to Cr(III). Zinc oxide nanoparticles were synthesized with an easy co-precipitation procedure, and the addition of Cu²⁺ doping agent effectively enhanced the Cr(VI) reduction in the presence of ultrasound (US). XRD, FT-IR, FE-SEM, EDX, VSM, and XPS were used to determine the structural specifications o ...
DOI:
10.1007/s11356-019-07165-9

5. 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

6. As(III) removal from aqueous solution by katoite (Ca3Al2(OH)12)

Author:
Lin Sha; Zhemin Zou; Jun Qu; Xinfei Li; Yiyi Huang; Chenjie Wu; Zhigao Xu
Source:
Chemosphere 2020 v.260 pp. 127555
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; agitation; anions; aqueous solutions; arsenites; drinking water; groundwater; irrigation; manufacturing; thermogravimetry; water purification
Abstract:
... As (III) is widely distributed in groundwater which is relatively harder to be removed comparing to As (V). Co-grinding Ca(OH)₂ with Al(OH)₃ was conducted to manufacture katoite (Ca₃Al₂(OH)₁₂) for the complete removal of As(III) (concentration below drinking water standard of WHO (<10 ppb)) during one-step agitation operation. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR ...
DOI:
10.1016/j.chemosphere.2020.127555

7. Ba(B₂OF₃(OH)₂)₂ with well-ordered OH/F anions and a unique B₂OF₃(OH)₂ dimer

Author:
Minqiang Gai; Ying Wang; Tinghao Tong; Liying Wang; Zhihua Yang; Xin Zhou; Shilie Pan
Source:
Chemical communications 2020 v.56 no.22 pp. 3301-3304
ISSN:
1364-548X
Subject:
X-ray diffraction; anions; barium; chemical reactions; crystal structure; crystals; hydrogen; minerals; probability
Abstract:
... In minerals and artificial crystals, the OH and F groups often coexist and have a high probability of disordered structure. The OH/F position cannot be determined accurately in the crystal structure only by the direct X-ray diffraction method because of the poor contrast between O and F and the weak diffractivity of hydrogen atoms. In this work, a new fluorooxoborate Ba[B₂OF₃(OH)₂]₂, with a size o ...
DOI:
10.1039/c9cc06532f

8. CBD grown pure and Ce-doped ZnO nanorods: Comparison of their photocatalytic degrading efficiencies on AR88 azo dye under visible light irradiation

Author:
Memnune Kardeş; Gizem Başaran Dindaş; Hüseyin Cengiz Yatmaz; Nadir Dizge; Koray Öztürk
Source:
Colloids and surfaces 2020 v.607 pp. 125451
ISSN:
0927-7757
Subject:
X-ray diffraction; ambient temperature; anions; aqueous solutions; azo dyes; ceric oxide; cerium; emissions factor; irradiation; nanorods; photocatalysis; photoluminescence; zinc; zinc oxide
Abstract:
... A seed-mediated approach was utilized in growing of pure and cerium-doped ZnO nanorods via a low-temperature (∼95 °C) chemical bath deposition (CBD) method. The aqueous solutions with different Ce molar ratios (Ce/(Ce + Zn), which were equal to 0, 0.01, 0.05, 0.1 or 0.2) were prepared. An excess amount of cerium ions (≥0.1 in the present study) caused the formation of a new phase, identified as Ce ...
DOI:
10.1016/j.colsurfa.2020.125451

9. Carbon quantum dots functionalized agarose gel matrix for in solution detection of nonylphenol

Author:
Sanju Singh; Preeti Nigam; Aisha Pednekar; Souvik Mukherjee; Abhishek Mishra
Source:
Environmental technology 2020 v.41 no.3 pp. 322-328
ISSN:
1479-487X
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; agarose; algae; anions; aquatic environment; carbon quantum dots; detection limit; fluorescence; gels; moieties; nonylphenols; pH; rapid methods; toxicity; vibration; wastes; water solubility
Abstract:
... Nonylphenol, an endocrine disrupter, is widely released to the aquatic environment, which is accumulative and extremely toxic to aquatic organisms. Here, we report a simple and cost-effective large-scale green synthesis of water-soluble highly fluorescent carbon quantum dots (CQDs) from marine biowaste (offshore washed algae) which gets quenched strongly in the presence of nonylphenol. These CQDs ...
DOI:
10.1080/09593330.2018.1498133

10. Cationic metal-organic framework based mixed-matrix membrane for extraction of phenoxy carboxylic acid (PCA) herbicides from water samples followed by UHPLC-MS/MS determination

Author:
Gege Wu; Jiping Ma; Shasha Wang; Huining Chai; Liang Guo; Jinhua Li; Abbas Ostovan; Yafeng Guan; Lingxin Chen
Source:
Journal of hazardous materials 2020 v.394 pp. 122556
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; carboxylic acids; coordination polymers; detection limit; electrostatic interactions; herbicides; ionic strength; nuclear magnetic resonance spectroscopy; pH; pollutants; scanning electron microscopy; tandem mass spectrometry; thermoplastics; ultra-performance liquid chromatography
Abstract:
... A novel kind of cationic metal-organic framework(MOF) based mixed-matrix membrane(MMM) namely cationic MOF-MMM was firstly designed and used for simultaneous dispersive membrane extraction(DME) of six phenoxy carboxylic acid(PCA) herbicides from water samples followed by determination using ultrahigh-performance liquid chromatography tandem mass spectrometry. The cationic MOF-MMM was synthesized b ...
DOI:
10.1016/j.jhazmat.2020.122556

11. Common Anions Affected Removal of Carbon Tetrachloride in Groundwater Using Granular Sponge Zerovalent Iron

Author:
Xueqiang Zhu; Baoping Han; Qiyan Feng
Source:
Water, air, and soil pollution 2020 v.231 no.4 pp. 138
ISSN:
0049-6979
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; anions; bicarbonates; carbon tetrachloride; chlorides; corrosion; energy-dispersive X-ray analysis; ferric oxide; groundwater; iron; oxidants; remediation; scanning electron microscopy; sulfates; uncertainty
Abstract:
... Significant attention has been devoted over the past two decades to research and field applications of zerovalent iron (ZVI) technologies for groundwater remediation. The uncertainty of ZVI effectiveness under complex subsurface environment will affect the application of ZVI remedial techniques. The effects of groundwater common anions Cl⁻, SO₄²⁻, and HCO₃⁻ on CCl₄ degradation by sponge ZVI were i ...
DOI:
10.1007/s11270-020-04494-1

12. Effect of simulated acid rain on stability of arsenic calcium residue in residue field

Author:
Jiangchi Fei; Jingjing Ma; Jinqin Yang; Yanjie Liang; Yong Ke; Liwei Yao; Yuancheng Li; Degang Liu; Xiaobo Min
Source:
Environmental geochemistry and health 2020 v.42 no.3 pp. 769-780
ISSN:
0269-4042
Subject:
X-ray diffraction; acid rain; acidity; anions; arsenic; calcium; calcium arsenate; chlorides; crystallization; environmental hazards; heavy metals; industrial wastes; leachates; leaching; particle size; scanning electron microscopy; sulfates
Abstract:
... In recent years, acid rain had a serious negative impact on the leaching behavior of industrial waste residue. Researches were mainly focused on the environmental hazards of heavy metal in the leachate, but ignored the effects of heavy metal speciation on the stability of waste residue in the subsequent stabilization process. In this study, the unstable calcium–arsenic compounds in the arsenic cal ...
DOI:
10.1007/s10653-019-00273-y

13. Effect of the Ionic Liquid Structure on the Melt Processability of Polyacrylonitrile Fibers

Author:
Halie J. Martin; Huimin Luo; Hao Chen; Chi-Linh Do-Thanh; Logan T. Kearney; Richard Mayes; Amit K. Naskar; Sheng Dai
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 8663-8673
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; anions; carbon; carbon fibers; carbonization; chemical structure; chlorides; differential scanning calorimetry; ionic liquids; mechanical properties; mechanical testing; melting; polyacrylonitrile; scanning electron microscopy; thermogravimetry; toxicity; vapor pressure
Abstract:
... The production of high-strength carbon fibers is an energy-intensive process, where a significant cost involves the wet or dry-spinning of polyacrylonitrile (PAN) fiber precursors. Melt-spinning PAN fibers would allow for significant reduction in the production cost and production hazards. Ionic liquids (ILs) are an attractive fiber-processing medium because of their negligible vapor pressure and ...
DOI:
10.1021/acsami.9b19704

14. Efficient removal of iodide anion from aqueous solution with recyclable core-shell magnetic Fe3O4@Mg/Al layered double hydroxide (LDH)

Author:
Il-Kwon Jung; Yongheum Jo; Sol-Chan Han; Jong-Il Yun
Source:
Science of the total environment 2020 v.705 pp. 135814
ISSN:
0048-9697
Subject:
X-ray diffraction; adsorbents; adsorption; aluminum; anions; aqueous solutions; carbonates; coatings; economics; hydroxides; liquids; magnesium; magnetism; magnetite; physicochemical properties; remediation; surface area; transmission electron microscopy; zeta potential
Abstract:
... Magnetic Mg/Al layered double hydroxides (LDH) with three cationic ratios (Mg/Al = 2:1, 3:1, and 4:1) were successfully synthesized and utilized for the first time in an iodide adsorption study. The effects of the Mg/Al ratio of LDH on iodide adsorption were investigated, and physicochemical properties of synthetic LDHs depending on Mg/Al ratio were confirmed by XRD, TEM, ICP-OES, VSM, Zeta-potent ...
DOI:
10.1016/j.scitotenv.2019.135814

15. Efficient transformation of diethyl phthalate using calcium peroxide activated by pyrite

Author:
Yang Zhou; Min Huang; Xiaolei Wang; Juan Gao; Guodong Fang; Dongmei Zhou
Source:
Chemosphere 2020 v.253 pp. 126662
ISSN:
0045-6535
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; anions; aqueous solutions; bicarbonates; calcium peroxide; catalysts; catalytic activity; chlorides; diethyl phthalate; electron paramagnetic resonance spectroscopy; free radicals; hydrogen peroxide; hydroxyl radicals; iron; nitrates; pH; polluted soils; pyrite; scanning electron microscopy; soil remediation; sulfates; sulfur
Abstract:
... In this study, pyrite (FeS₂) was used as a novel activator of calcium peroxide (CaO₂) for the degradation of diethyl phthalate (DEP) in both aqueous solution and soil. DEP (10 mg/L) in aqueous solution was completely degraded within 5.0 min by the FeS₂ (0.30 g/L)/CaO₂ (1.0 mM) system at pH 3.5. X-ray diffraction (XRD), scanning electron microscopy (SEM), electron paramagnetic resonance (EPR), free ...
DOI:
10.1016/j.chemosphere.2020.126662

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

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

17. Enhanced removal of dye from wastewater by Fenton process activated by core-shell NiCo2O4@FePc catalyst

Author:
Hengli Qian; Qidong Hou; Guanjie Yu; Yifan Nie; Chuanyunlong Bai; Xinyu Bai; Meiting Ju
Source:
Journal of cleaner production 2020 v.273 pp. 123028
ISSN:
0959-6526
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; bicarbonates; catalysts; catalytic activity; chlorides; cobalt; desorption; dyes; filtration; hydroxyl radicals; iron; liquids; mineralization; nickel; nitrogen; organic matter; oxygen; pollutants; reaction kinetics; superoxide anion; surface area; tap water; transmission electron microscopy; wastewater
Abstract:
... To achieve efficient degradation of dye in wastewater, the core-shell nickel cobalt spinel coated with iron phthalocyanine (NiCo₂O₄@FePc) catalyst was prepared via a facile template method and investigated as heterogenous catalyst for degradation of dye in Fenton process. The catalysts were systematically characterized by transmission electron microscopy (TEM), N₂ adsorption/desorption isotherms, ...
DOI:
10.1016/j.jclepro.2020.123028

18. Enhanced removal of vanadium(V) from groundwater by layered double hydroxide-supported nanoscale zerovalent iron

Author:
Xiangrui Kong; Jiehao Chen; Yunjia Tang; Yan Lv; Tan Chen; Hongtao Wang
Source:
Journal of hazardous materials 2020 v.392 pp. 122392
ISSN:
0304-3894
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; desorption; dissolved oxygen; groundwater; iron; pH; scanning electron microscopy; toxicity; vanadium
Abstract:
... To reduce the toxicity of vanadium(V) [V(V)] and inhibit the desorption of adsorbed vanadium in groundwater, we synthesized nanoscale zerovalent iron (nZVI) dispersed on layered double hydroxide (LDH) composites (nZVI@LDH) to remove V(V) from simulated groundwater. We found that nZVI@LDH could reduce high-valence vanadium to low-valence vanadium, then forming vanadium-containing precipitation to r ...
DOI:
10.1016/j.jhazmat.2020.122392

19. Green synthesis of iron nanoparticles using Korla fragrant pear peel extracts for the removal of aqueous Cr(VI)

Author:
Kun Rong; Jinye Wang; Zaiwang Zhang; Jiqiang Zhang
Source:
Ecological engineering 2020 v.149 pp. 105793
ISSN:
0925-8574
Subject:
Fourier transform infrared spectroscopy; Pyrus; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; aqueous solutions; carbonates; chlorides; chromium; flavonoids; iron; kinetics; nanoparticles; nitrates; oxides; pH; pears; phosphates; polyphenols; scanning electron microscopy; sorption isotherms; sulfates; temperature; transmission electron microscopy
Abstract:
... Iron nanoparticles (KP-FeNPs) were successfully synthesized using Korla fragrant pear (Pyrus sinkiangensis Yu) peel extracts through a green synthetic method. The KP-FeNPs were characterized by TEM, SEM, XPS, XRD, and FTIR, and subsequently used to remove Cr(VI) from aqueous solutions. The KP-FeNPs were irregularly-shaped and ranged from 20 to 90 nm in size. Iron in the KP-FeNPs was mainly present ...
DOI:
10.1016/j.ecoleng.2020.105793

20. Highly Efficient Separation of Anionic Organic Pollutants from Water via Construction of Functional Cationic Metal–Organic Frameworks and Mechanistic Study

Author:
Chaofeng Zhao; Yao Du; Jichuan Zhang; Yongsheng Mi; Hui Su; Teng Fei; Shenghua Li; Siping Pang
Source:
ACS applied materials & interfaces 2020 v.12 no.20 pp. 22835-22844
ISSN:
1944-8252
Subject:
X-ray diffraction; activated carbon; adsorbents; adsorption; ambient temperature; anions; carbon nanotubes; coordination polymers; electrostatic interactions; energy; functional properties; heat; hydrogen bonding; ligands; nuclear magnetic resonance spectroscopy; oxygen; pollutants; pollution; sodium nitrate; sodium sulfate; titration; triazoles; wastewater
Abstract:
... Organic anions possess various functional properties; however, their presence in wastewater causes environmental pollution. Thus, coupling the separation of such species with the resultant function could be highly desirable. Herein, we propose a “killing two birds with one stone” strategy for highly efficient separation of organic pollutant anions from water at room temperature through direct cons ...
DOI:
10.1021/acsami.0c02624

21. Highly efficient cellulose dissolution by alkaline ionic liquids

Author:
Kallidanthiyil Chellappan Lethesh; Sigvart Evjen; Vishwesh Venkatraman; Syed Nasir Shah; Anne Fiksdahl
Source:
Carbohydrate polymers 2020 v.229 pp. 115594
ISSN:
0144-8617
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; ambient temperature; anions; cellulose; crystal structure; energy efficiency; imidazoles; ionic liquids
Abstract:
... Alkaline ionic liquids (ILs) with unconventional organic anions were prepared and used for cellulose dissolution studies. High concentrations of cellulose were dissolved at room temperature in the phenolate based imidazolium IL [C2mim][OPh], combined with organic solvent, and up to 45 wt-% cellulose dissolution (wt-% MCC of weight IL) was readily achieved at 100 ºC. No functionalization of the reg ...
DOI:
10.1016/j.carbpol.2019.115594

22. La₅ Ir₁.₇₃In₄.₂₇ with Lu₅Ni₂In₄-type structure

Author:
Nataliya Dominyuk; Vasyl’ I. Zaremba; Rainer Pöttgen
Source:
Zeitschrift für Naturforschung 2020 v.75 no.6-7 pp. 709-713
ISSN:
1865-7117
Subject:
X-ray diffraction; anions; furnaces; indium; iridium; lanthanum
Abstract:
... Single crystals of La₅Ir₁.₇₃In₄.₂₇ were grown from a sample of the starting composition 47La: 17Ir: 36 In by arc-melting, followed by a long annealing sequence in a muffle furnace. La₅Ir₁.₇₃In₄.₂₇ crystallizes with the Lu₅Ni₂In₄-type structure, space group Pbam, which was refined from single-crystal X-ray diffractometer data: a = 834.0(2), b = 1862.2(4), c = 385.31(8) pm, wR2 = 0.0278, 1165 F² val ...
DOI:
10.1515/znb-2020-0044

23. Lanthanum hydroxides modified poly(epichlorohydrin)-ethylenediamine composites for highly efficient phosphate removal and bacteria disinfection

Author:
Li-Shen Lin; Cheng-Gang Niu; Ning Tang; Chao Liang; Xiao-Xiao Lv; Hai Guo; Lei Zhang; Ya-Ya Yang; Hui-Yun Liu
Source:
Colloids and surfaces 2020 v.588 pp. 124344
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; bacteria; chemical bonding; disinfection; electrostatic interactions; epichlorohydrins; hydroxides; lanthanum; pH; phosphates; sorption isotherms; sulfates; synthesis
Abstract:
... Since environmental issues become more intense, the effective elimination of phosphate from water has received increasing attention. In this study, a bi-functional composite, La(OH)₃ loaded poly(epichlorohydrin)-ethylenediamine (PEE@La), was fabricated from La-compound and poly(epichlorohydrin)-ethylenediamine (PEE) through a simple chemical synthesis, and its performance on phosphate removal and ...
DOI:
10.1016/j.colsurfa.2019.124344

24. Laser synthesis of magnetite-partially reduced graphene oxide nanocomposites for arsenate removal from water

Author:
Julian A. Bobb; Fathi S. Awad; Sherif Moussa; M. Samy El-Shall
Source:
Journal of materials science 2020 v.55 no.13 pp. 5351-5363
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; aqueous solutions; arsenates; arsenic; desorption; graphene oxide; iron; iron oxides; leaching; magnetic separation; moieties; nanocomposites; nanoparticles; nanosheets; oxidation; reducing agents; remediation; scanning electron microscopy; sodium hydroxide; solvents; sorption isotherms; transmission electron microscopy; water pollution
Abstract:
... Herein, we report the development of a facile process for the synthesis of magnetite-partially reduced graphene oxide (Mag-PRGO) without the use of chemical reducing agents or solvents for the efficient removal of arsenate As(V) ions from contaminated water. The Mag-PRGO is synthesized using the laser vaporization-controlled condensation method where a compressed target consisting of metallic iron ...
DOI:
10.1007/s10853-020-04363-6

25. Membranes with novel highly-delocalized sulfonylimide anions for lithium-ion batteries

Author:
Daria Voropaeva; Daniil Golubenko; Arthur Merkel; Andrey Yaroslavtsev
Source:
Journal of membrane science 2020 v.601 pp. 117918
ISSN:
0376-7388
Subject:
X-ray diffraction; anions; carbonates; cation-exchange membranes; composite polymers; dielectric spectroscopy; differential scanning calorimetry; ethylene; infrared spectroscopy; lithium batteries; mechanical properties; moieties; propylene; scanning electron microscopy; sodium; thermogravimetry
Abstract:
... Cation-exchange membranes containing sulfo R–SO₃M and sulfonylimide functional groups [R–SO₂NSO₂–X]M, where X=CCl₃, CF₃, Ph, p-NO₂Ph, p-CF₃Ph and M⁺=Li/Na/H, have been synthesized by the Hinsberg reaction from the polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene block copolymer. The obtained membranes have been characterized using ATR IR spectroscopy, CHNS elemental analysis, TGA, D ...
DOI:
10.1016/j.memsci.2020.117918

26. New insights into the removal of antimony from water using an iron-based metal-organic framework: Adsorption behaviors and mechanisms

Author:
Kuan Cheng; Yi-nan Wu; Bingru Zhang; Fengting Li
Source:
Colloids and surfaces 2020 v.602 pp. 125054
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; antimony; coordination polymers; drinking water; ethanol; ferric oxide; humans; pH; pollution; solvents; temperature
Abstract:
... Increasing antimony (Sb) pollution has posed severe health threats to human beings and the environment. In the study, iron-based metal-organic framework Fe-MIL-88B was synthesized at low temperature (40 °C) via ethanol as solvent. And the removal of Sb(III) and Sb(V) by using Fe-MIL-88B were investigated systematically with the effects of pH, adsorbent dosages, adsorption time, initial concentrati ...
DOI:
10.1016/j.colsurfa.2020.125054

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

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

28. One-step synthesis of Mn-doped MIL-53(Fe) for synergistically enhanced generation of sulfate radicals towards tetracycline degradation

Author:
Jun Yu; Jiao Cao; Zhaohui Yang; Weiping Xiong; Zhengyong Xu; Peipei Song; Meiying Jia; Saiwu Sun; Yanru Zhang; Juan Zhu
Source:
Journal of colloid and interface science 2020 v.580 pp. 470-479
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; active sites; anions; aqueous solutions; catalysts; catalytic activity; electron paramagnetic resonance spectroscopy; endothermy; free radicals; humic acids; iron; liquid chromatography; manganese; mass spectrometry; pH; scanning electron microscopy; sulfates; tetracycline; thermodynamics; wastewater; wastewater treatment
Abstract:
... Herein, Mn-doped MIL-53(Fe) were fabricated via one-pot solvothermal method and used for peroxymonosulfate (PMS) activation towards tetracycline (TC) degradation from aqueous solution. The characterizations of SEM, FTIR and XRD were utilized to reveal the morphology and structure of the materials. The results showed that Mn-MIL-53(Fe)-0.3 displayed the optimal catalytic performance, the removal ef ...
DOI:
10.1016/j.jcis.2020.07.045

29. Organic modification of Mo-decorated MgAl layered double hydroxide for polymer flame retardancy

Author:
Li Jin; Qing-Jun Huang; Hong-Yan Zeng; Jin-Ze Du; Sheng Xu
Source:
Composites 2020 v.129 pp. 105717
ISSN:
1359-835X
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; anions; burning; composite materials; cost effectiveness; differential thermal analysis; fire resistance; heat; hydrophobicity; microstructure; nanoparticles; oxygen; polypropylenes; scanning electron microscopy; thermogravimetry
Abstract:
... A novel stearic-pillared MgAl layered double hydroxide (S-Mo/LDH) containing MoOx nanoparticles was successfully prepared by calcination-reconstruction, where MoOx nanoparticles were decorated onto the surface of the S-Mo/LDH by reducing the MoO42−-pillared LDH precursor (Mo-LDH). The microstructures, bonding states and surface properties were investigated by XRD, SEM, FT-IR, BET/BJH, WAC and TG-D ...
DOI:
10.1016/j.compositesa.2019.105717

30. Persulfate activation by nano zero-valent iron for the degradation of metoprolol in water: influencing factors, degradation pathways and toxicity analysis

Author:
Yu-qiong Gao; Jia Zhang; Jin-qiang Zhou; Cong Li; Nai-yun Gao; Da-qiang Yin
Source:
RSC advances 2020 v.10 no.35 pp. 20991-20999
ISSN:
2046-2069
Subject:
Vibrio fischeri; X-ray diffraction; X-ray photoelectron spectroscopy; anions; bicarbonates; chlorides; corrosion; drugs; ferric oxide; ferrous sulfate; hydroxyl radicals; iron; nitrates; pH; temperature; toxicity; water pollution; water treatment
Abstract:
... In this study, nano zero-valent iron (nZVI) was utilized to activate persulfate (PS) for the degradation of metoprolol (MTP), a commonly used drug for curing cardiovascular diseases, in water. Quenching tests indicated that both the sulfate radical (SO₄˙⁻) and hydroxyl radical (˙OH) contributed to the degradation of MTP, while SO₄˙⁻ seemed to play a large role under natural pH conditions. Batch te ...
DOI:
10.1039/d0ra01273d

31. Photocatalytic Evaluation of Ag2CO3 for Ethylparaben Degradation in Different Water Matrices

Author:
Athanasia Petala; Athanasia Nasiou; Dionissios Mantzavinos; Zacharias Frontistis
Source:
Water 2020 v.12 no.4 pp. -
ISSN:
2073-4441
Subject:
X-ray diffraction; anions; bicarbonates; bottled water; carbonates; catalysts; chlorides; degradation; filters; humic acids; irradiation; kinetics; photocatalysis; physicochemical properties; reflectance spectroscopy; silver; solar radiation; transmission electron microscopy; wastewater; water
Abstract:
... The present study examines the photocatalytic properties of silver carbonate (Ag₂CO₃) for ethyl paraben (EP) degradation under simulated solar irradiation. Ag₂CO₃ was prepared according to a solution method and its physicochemical characteristics were studied by means of X-ray diffraction (XRD), the Brunauer–Emmett–Teller (BET) method, diffuse reflectance spectroscopy (DRS), and transmission elect ...
DOI:
10.3390/w12041180

32. Potentiometric detection of copper ion using chitin grafted polyaniline electrode

Author:
Vinay Kr Singh; Chandra Shekhar Kushwaha; S.K. Shukla
Source:
International journal of biological macromolecules 2020 v.147 pp. 250-257
ISSN:
0141-8130
Subject:
X-ray diffraction; anions; cations; chemical structure; chitin; copper; detection limit; electrodes; physical properties; polyaniline; scanning electron microscopes; spectroscopy
Abstract:
... Potentiometric detection of copper ion over chemically interactive and electrically responsive chitin grafted polyaniline (Chit-g-PANI) electrode has been demonstrated for natural as well as artificial samples under optimized conditions using a portable sensing setup. The physical properties and chemical structure of developed electrode were evaluated by different Infrared spectrometry, X-ray diff ...
DOI:
10.1016/j.ijbiomac.2019.12.209

33. Preparation of a novel iron-based biochar composite for removal of hexavalent chromium in water

Author:
Luyao Qin; Li He; Wenjie Yang; Aijun Lin
Source:
Environmental science and pollution research international 2020 v.27 no.9 pp. 9214-9226
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; biochar; chromium; composite materials; nanoparticles; pH; scanning electron microscopy; sulfides; wastewater
Abstract:
... The chitosan-stabilized ferrous sulfide nanoparticles were loaded on biochar to prepare a composite material FeS-CS-BC for effective removal of hexavalent chromium in water. BC and FeS-CS-BC were characterized by Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) analyses. Batch experiments were employed to ...
DOI:
10.1007/s11356-019-06954-6

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

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

35. Properties and mechanism of hexavalent chromium removal by FeS@ graphite carbon nitride nanocomposites

Author:
Junjie Su; Han Hao; Xiaofan Lv; Xin Jin; Qi Yang
Source:
Colloids and surfaces 2020 v.597 pp. 124751
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; anions; aqueous solutions; bicarbonates; carbon nitride; chemical reduction; chlorides; chromium; endothermy; entropy; graphene; models; nanocomposites; nitrates; pH; recycling; scanning electron microscopy; sorption isotherms; sulfates; temperature
Abstract:
... A novel nanocomposite, named as FCN, which was synthesized by loading FeS (Mackinawite) onto graphite phase carbon nitride (g-C₃N₄), was applied to remove Cr(VI) in aqueous solutions and characterized by SEM, BET, XRD, FTIR, Zeta and XPS. The effect of adsorption parameters including temperature, initial solution pH, FCN dosage, the initial concentration of Cr(VI), recycling performance of FCN and ...
DOI:
10.1016/j.colsurfa.2020.124751

36. Recovery of zinc granules from synthetic electroplating wastewater using fluidized-bed homogeneous crystallization process

Author:
M. D. G. de Luna; L. H. S. Paulino; C. M. Futalan; M. C. Lu
Source:
International journal of environmental science and technology 2020 v.17 no.1 pp. 129-142
ISSN:
1735-1472
Subject:
X-ray diffraction; anions; carbonates; chlorides; crystallization; electroplating; fluidized beds; fluorides; granules; maximum contaminant level; nitrates; pH; pellets; smithsonite; wastewater; zinc
Abstract:
... In the present work, the recovery of zinc granules from synthetic electroplating wastewater was evaluated using fluidized-bed homogeneous crystallization. The effect of carbonate-to-zinc ([CO₃²⁻]/[Zn²⁺]) molar ratio (1.0–2.0), precipitant pH (10.30–11.20), initial zinc concentration (100–500 mg/L), and anions (Cl⁻, F⁻, and NO₃⁻) on the removal and granulation efficiencies of zinc was investigated. ...
DOI:
10.1007/s13762-019-02439-8

37. Removal of phosphate and nitrate ions from water by amine crosslinked magnetic banana bract activated carbon and its physicochemical performance

Author:
Perumal Karthikeyan; Sivakumar Vigneshwaran; Sankaran Meenakshi
Source:
Environmental nanotechnology, monitoring & management 2020 v.13 pp. 100294
ISSN:
2215-1532
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; activated carbon; adsorbents; adsorption; anions; bananas; crosslinking; differential scanning calorimetry; electrostatic interactions; endothermy; energy-dispersive X-ray analysis; environmental factors; eutrophication; ion exchange; kinetics; magnetic separation; magnetism; models; nitrates; pH; phosphates; remediation; scanning electron microscopy; standard deviation; temperature; thermodynamics; thermogravimetry; wastewater; water pollution
Abstract:
... In the present work, magnetic separation is one of the most effective techniques to recovering the phosphate and nitrate ions from water using amine crosslinked magnetic banana bract activated carbon (ACM@BBAC) was prepared via magnetization and was further crosslinked by amine groups. The ACM@BBAC was extensively studied by using SEM, EDAX with mapping images, FTIR, TGA-DSC, XRD, BET, and VSM ana ...
DOI:
10.1016/j.enmm.2020.100294

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

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

39. Reversible Energy Storage in Layered Copper-Based Coordination Polymers: Unveiling the Influence of the Ligand’s Functional Group on Their Electrochemical Properties

Author:
Marco Amores; Keisuke Wada; Ken Sakaushi; Hiroshi Nishihara
Source:
Journal of physical chemistry 2020 v.124 no.17 pp. 9215-9224
ISSN:
1932-7455
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; benzene; cations; coordination polymers; copper; electrochemistry; electrodes; energy; ligands; mass spectrometry; metal ions; models; moieties; structure-activity relationships; voltammetry
Abstract:
... Coordination polymers represent a suitable model for studying redox mechanisms in materials where both metal cations and ligands undergo electrochemical reactions and are capable of proceeding through reversible multielectron-transfer processes with the insertion of cations and anions into their open structures. Designing new coordination polymers for electrochemical energy storage with improved p ...
DOI:
10.1021/acs.jpcc.0c01486

40. Selective and efficient adsorption of Au (III) in aqueous solution by Zr-based metal-organic frameworks (MOFs): An unconventional way for gold recycling

Author:
Ziyong Chang; Fangxu Li; Xiaoyue Qi; Bo Jiang; Jue Kou; Chunbao Sun
Source:
Journal of hazardous materials 2020 v.391 pp. 122175
ISSN:
0304-3894
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; aqueous solutions; coordination polymers; crystal structure; electrostatic interactions; endothermy; entropy; equations; gold; kinetics; particle size; recycling; redox reactions; surface area; transmission electron microscopes; transmission electron microscopy
Abstract:
... Recycling precious metals from secondary resources is of great environmental and economic significance. In this study, the Zr-based MOFs UiO-66-NH₂ was synthesized and used to adsorb Au (III) in aqueous solution. The ultrafine particle size (∼50 nm), excellent crystallinity and huge specific surface area (1039.2 m² ·g⁻¹) were verified by transmission electron microscope (TEM), powder X-ray diffrac ...
DOI:
10.1016/j.jhazmat.2020.122175

41. Self-Assembled Cagelike Receptor That Binds Biologically Relevant Dicarboxylic Acids via Proton-Coupled Anion Recognition

Author:
Fei Wang; Sajal Sen; Chuang Chen; Steffen Bähring; Chuanhu Lei; Zhiming Duan; Zhan Zhang; Jonathan L. Sessler; Atanu Jana
Source:
Journal of the American Chemical Society 2020 v.142 no.4 pp. 1987-1994
ISSN:
1520-5126
Subject:
X-ray diffraction; acetic acid; adipic acid; anions; fluorides; gases; hydrochloric acid; hydrogen bonding; maleic acid; malonic acid; moieties; oxalic acid; p-toluenesulfonic acid; propionic acid; protons; spectral analysis; succinic acid; sulfonic acids; sulfuric acid; tetrabutylammonium compounds; washing
Abstract:
... We report here a fully organic, self-assembled dimeric receptor, constructed from acyclic naphthyridyl–polypyrrolic building blocks. The cagelike dimer is stable in the solid state, in solution, and in gas phase, as inferred from X-ray diffraction and spectroscopic analyses. This system acts as a receptor for oxalic acid, maleic acid, and malonic acid in the solid state and in THF solution. In con ...
DOI:
10.1021/jacs.9b11566

42. Simultaneous adsorption and oxidation of antimonite onto nano zero-valent iron sludge-based biochar: Indispensable role of reactive oxygen species and redox-active moieties

Author:
Dongning Wei; Bingyu Li; Lin Luo; Yongxin Zheng; Liuhui Huang; Jiachao Zhang; Yuan Yang; Hongli Huang
Source:
Journal of hazardous materials 2020 v.391 pp. 122057
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acid mine drainage; adsorbents; adsorption; aerobic conditions; anaerobic conditions; anions; antimony; aqueous solutions; biochar; engineering; hydroquinone; hydroxyl radicals; iron; lakes; moieties; oxidants; oxidation; pH; quinones; river water; scanning electron microscopy; temperature; toxicity; transmission electron microscopy
Abstract:
... The nano zero-valent iron sludge-based biochar (nZVI-SBC) was prepared in this study to eliminate Sb(III) from aqueous solutions, which was characterized by BET, SEM, XRD, TEM, FTIR, XPS. Our results proved that the incorporated nZVI on SBC matrix could significantly enhance eliminating Sb(III), and the max-adsorption capacity (160.40 mg g⁻¹) can be achieved at pH = 4.8 ± 0.2 and temperature of 29 ...
DOI:
10.1016/j.jhazmat.2020.122057

43. Spectroscopic studies on the phosphorus adsorption in salt-affected soils with or without nano-biochar additions

Author:
Esawy Mahmoud; Ahmed El Baroudy; Nehal Ali; Mahmoud Sleem
Source:
Environmental research 2020 v.184 pp. 109277
ISSN:
0013-9351
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; anions; biochar; models; moieties; phosphorus; saline soils; soil salinity; sorption isotherms; spectral analysis
Abstract:
... Biochar amendment may be an effective solution of maintaining phosphorus (P) and sustaining agricultural production in salt affected soils. However, the behavior of P adsorption in salt-affected soils with nano-biochar (nB) amendment is unclear. Batch adsorption experiments were conducted to investigate the impacts of different levels of soil salinity amended with nB at rates of 0, 0.10%, 0.20%, a ...
DOI:
10.1016/j.envres.2020.109277

44. Starch treatment with deep eutectic solvents, ionic liquids and glycerol. A comparative study

Author:
Magdalena Zdanowicz
Source:
Carbohydrate polymers 2020 v.229 pp. 115574
ISSN:
0144-8617
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; anions; choline; comparative study; glycerol; imidazoles; ionic liquids; mechanical testing; microscopy; potato starch; salts; starch; tensile strength; thermal stability; thermoplastics; viscosity
Abstract:
... In this work changes in potato starch during processing (dissolution and plasticization via thermocompression) in the presence of three types of media: deep eutectic solvents (DES) with different anions in choline salts and components molar ratios, ionic liquids (IL) and glycerol (G) were investigated. Urea-based DES and IL exhibited dissolving capacity towards starch (confirmed with microscopic o ...
DOI:
10.1016/j.carbpol.2019.115574

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

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

46. Surface modified layered double hydroxide/polyaniline nanocomposites: Synthesis, characterization and Pb2+ removal

Author:
Mohammad Dinari; Sima Neamati
Source:
Colloids and surfaces 2020 v.589 pp. 124438
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; absorption; active sites; adsorbents; adsorption; aniline; anions; aqueous solutions; calcium; citrates; iron; lead; models; pH; polyaniline; polymer nanocomposites; polymerization; scanning electron microscopy; silane; sorption isotherms; thermal stability; thermogravimetry; transmission electron microscopy
Abstract:
... In this study, Ca/Fe layered double hydroxide (LDH) with good accessible chemically active sites and with intercalate anions of citrate was prepared, and then 3-aminopropyl triethoxysilane as a silane coupling agent was used to modify the LDH surface. Then, in order to improve the thermal stability and removal efficiency toward bivalent Pb²⁺, polymer matrix nanocomposites (PMNCs) were fabricated b ...
DOI:
10.1016/j.colsurfa.2020.124438

47. Synthesis and H⁻ conductivity of a new oxyhydride Ba₂YHO₃ with anion-ordered rock-salt layers

Author:
Haq Nawaz; Fumitaka Takeiri; Akihide Kuwabara; Masao Yonemura; Genki Kobayashi
Source:
Chemical communications 2020 v.56 no.71 pp. 10373-10376
ISSN:
1364-548X
Subject:
X-ray diffraction; anions; chemical communication; neutron diffraction
Abstract:
... A new layered perovskite oxyhydride Ba₂YHO₃ was synthesized via high pressure synthesis. Powder X-ray and neutron diffraction experiments revealed that in Ba₂YHO₃ the ordered H⁻ and O²⁻ anions form [Ba₂H₂] rock-salt layers wherein H⁻ conduction is allowed. The conductivity reached 0.1 mS cm⁻¹ at 350 °C, which is higher than that of isostructural Ba₂ScHO₃ with anion-disordered [Ba₂HO] layers. ...
DOI:
10.1039/d0cc03638b

48. Synthesis and characterization of K₅Sn₂OF₁₁

Author:
Christiane Stoll; Markus Seibald; Hubert Huppertz
Source:
Zeitschrift für Naturforschung 2020 v.75 no.1-2 pp. 83-90
ISSN:
1865-7117
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; anions; cations; copper; crystallization; fluorides; potassium
Abstract:
... The potassium oxidofluoridostannate(IV) fluoride K₅Sn₂OF₁₁ was synthesized via a solid-state route at T = 300°C in arc-weldeded copper ampoules. It crystallizes in the orthorhombic system in the acentric space group Ama2 (no. 40) with a unit cell volume of V = 2.5727(4) nm³. The cell parameters are a = 1758.3(2), b = 2452.3(2) and c = 596.7(1) pm. As a main structural motif, K₅Sn₂OF₁₁ exhibits two ...
DOI:
10.1515/znb-2019-0158

49. Synthesis and characterization of a high-quality nanocontainer based on benzimidazole-zinc phosphate (ZP-BIM) tailored graphene oxides; a facile approach to fabricating a smart self-healing anti-corrosion system

Author:
Sina Asaldoust; Bahram Ramezanzadeh
Source:
Journal of colloid and interface science 2020 v.564 pp. 230-244
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; anions; cations; coatings; corrosion; electrochemistry; energy-dispersive X-ray analysis; epoxides; graphene; graphene oxide; nanocarriers; phosphates; scanning electron microscopy; sodium chloride; steel; zinc
Abstract:
... This paper describes the synthesis of a novel corrosion inhibitor nanocarrier based on benzimidazole-zinc phosphate (ZP-BIM) tailored graphene oxide (GO) and its application in the epoxy-based composite coating for the achievement of smart self-healing anti-corrosion properties toward mild steel (MS) against saline solution. The morphology and chemical/phase composition of the GO-ZP-BIM particles ...
DOI:
10.1016/j.jcis.2019.12.122

50. Synthesis and high-pressure studies of strontium diazenide by synchrotron X-ray diffraction and DFT calculations

Author:
Yue Li; Huanpeng Bu; Qinglin Wang; Jiani Lin; Xiaoli Wang; Jianfu Li; Pinwen Zhu; Hongyang Zhu
Source:
RSC advances 2020 v.10 no.44 pp. 26308-26312
ISSN:
2046-2069
Subject:
X-ray diffraction; anions; anisotropy; azides; compressibility; phase transition; strontium
Abstract:
... In this work, strontium diazenide (SrN₂) was synthesized using strontium azide as a starting material in a Walker-type module under high-pressure and high-temperature conditions. The synthesized SrN₂ was further studied under high pressure up to 43.2 GPa using in situ synchrotron X-ray diffraction to supplement the high-pressure exploration of alkaline earth diazenides. The SrN₂ underwent a possib ...
DOI:
10.1039/d0ra00789g