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Removal of antimonite and antimonate from water using Fe-based metal-organic frameworks: The relationship between framework structure and adsorption performance

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Journal of Environmental Sciences 2019年第12期31卷 213-224页

作者： Wei Zhang Na Li Ting Xiao Wenting Tang Guangli Xiu State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Tongji UniversityShanghai 200092China Shanghai Environmental Protection Key Laboratory on Environmental Standard and Risk Management of Chemical Pollutants East ChinaUniversity of Science and TechnologyShanghai 200237China

We investigated the adsorption performance of five Fe-based MOFs(Fe-BTC,MIL-100(Fe),MIL-101(Fe),MIL-53(Fe)and MIL-88 C(Fe))for removal of antimonite(Sb(Ⅲ))and antimonate(Sb(Ⅴ))from *** these MOFs,MIL-101(Fe)exhibited the best adsorption capacities for both Sb(Ⅲ)and Sb(Ⅴ)(151.8 and 472.8 mg/g,respectively)which were higher than those of most adsorbents previously *** effect of steric hindrance was evident during Sb removal using the Fe-based MOFs,and the proper diameter of the smallest cage windows/channels should be considered an important parameter during the evaluation and selection of ***,the adsorption capacities of MIL-101(Fe)for Sb(Ⅴ)decreased with increasing initial p H values(from 3.0 to 8.0),while the opposite trend was observed for Sb(Ⅲ).Chloride,nitrate and sulfate ions had a negligible influence on Sb(Ⅴ)adsorption,while NO3-and SO42-improved Sb(Ⅲ)*** result implies that inner sphere complexes might form during both Sb(Ⅲ)and Sb(Ⅴ)adsorption.

关键词： Metal organic frameworks MIL-101(Fe) Antimonite antimonate Cage windows Steric hindrance

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Thermoelectric Properties of Silver antimonate with Mixed Valency of Antimony

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Journal of Materials Science and Chemical Engineering 2017年第1期5卷 121-128页

作者： Kensuke Ozawa Hirofumi Kakemoto Hiroshi Irie Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Yamanashi Japan Clean Energy Research Center University of Yamanashi Yamanashi Japan

Silver (Ag) and silver antimonate (AgSbO3) composites with different amounts of Sb3+ were synthesized by normal sintering with the aim of realizing a thermoelectric material. The electrical conductivity (σ) increased in the sample containing larger amount of Sb3+, whereas Seebeck coefficient (S) decreased. Producing Sb3+ caused the generation of oxygen vacancies in the material, and thus the corresponding donor levels are created in the bandgap, providing more conduction electrons. The conductive Ag particles would contribute to the conduction path as bypasses for carrier transport. The thermal conductivity (κ) was slightly lower in the presence of Ag defects in AgSbO3.

关键词： Thermoelectric Material Silver antimonate Seebeck Coefficient Electrical Conductivity Thermal Conductivity

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Spectral properties and Judd-Ofelt analysis of novel red phosphors Gd_(2)InSbO_(7):Eu^(3+)with high color purity for white LEDs

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Journal of Rare Earths 2021年第11期39卷 1327-1335,I0001页

作者： Yu Wang Baokui Zhao Bin Deng Shanshan Chen Yuanyuan Liu a Guodong Wang Ruijin Yu College of Chemistry&Pharmacy Northwest A&F UniversityYangling 712100China College of Science Northwest A&F UniversityYangling 712100China College of Chemistry&Biology and Environmental Engineering Xiangnan UniversityChenzhou 423043China Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application Chenzhou 423043China

Gd_(2)InSbO_(7):Eu^(3+)red phosphors we re successfully synthesized via high-temperature solid-state reactio *** phase purity,particle size,and luminescence properties of obtained phosphors were measured and analyzed in *** Gd_(2)InSbO_(7)lattice possesses cubic structure with F_(d-3 m)(227)space *** phosphors emit bright red emission at 628 nm under 393 nm excitation,and this phenomenon is attributed to the^(5)D0-^(7)F_(2)*** Judd-Ofelt parameters(Ω_(2),Ω_(4)),transition ratio,and branching ratios(β)of Eu^(3+)-doped Gd_(2)InSbO_(7)phosphor were calculated on the basis of the emission spectra and decay *** optimal content in Gd_(2)InSbO_(7):xEu^(3+)is identified to be 15 mol%.The thermal quenching of Gd_(2)InSbO_(7):Eu^(3+)is found to be over 500 K,and its activation energy is 0.26 *** Commission Internationale de l’Eclairage(CIE)chromaticity coordinates of Gd_(2)InSbO_(7):15%Eu^(3+)are(0.629,0.371),which are close to ideal red chromaticity coordinates(0.670,0.330).The fabricated w-LED exhibits good color rendering index(Ra)(86),correlated color temperature(CCT)(6997 K),and CIE chromaticity coordinates(0.302,0.330).The obtained results demonstrate that Gd_(2)InSbO_(7):Eu^(3+)phosphors have potential applications in white LEDs.

关键词： Luminescence Phosphor antimonate Gd_(2)InSbO_(7) Rare earths

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Role of Sb(V) in removal of As, Sb and Bi impurities from copper electrolyte

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Transactions of Nonferrous Metals Society of China 2014年第1期24卷 271-278页

作者：肖发新曹岛毛建伟申晓妮任凤章河南科技大学材料科学与工程学院洛阳471003 河南科技大学河南省有色金属材料科学与加工技术重点实验室洛阳471003

The function mechanism of Sb（V） in As, Sb and Bi impurities removal from copper electrolyte was investigated by adding Sb（V） ion in a synthetic copper electrolyte containing 45 g/L Cu2＋, 185 g/L H2SO4, 10 g/L As and 0.5 g/L Bi. The electrolyte was filtered, and the precipitate structure, morphology and composition were characterized by chemical analysis, SEM, TEM, EDS, XRD and FTIR. The results show that the precipitate is in the shape of many irregular lumps with size of 50-200 μm, and it mainly consists of As, Sb, Bi and O elements. The main characteristic bands in the FTIR spectra of the precipitate are As-O-As, As-O-Sb, Sb-O-Bi, Sb-O-Sb and Bi-O-Bi. The precipitate is the mixture of microcrystalline of AsSbO4, BiSbO4 and Bi3SbO7 by XRD and electronic diffraction. The removal of As, Sb and Bi impurities by Sb（V） ion can be mainly ascribed to the formation of antimonate in copper electrolytes.

关键词： As Bi As Bi antimonate copper electrolyte removal purification

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Aqueous-Phase Sorption Behaviors of Cs+, Co2+, Sr2+and Cd2+ions on some Composite Ion Exchangers

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Advances in Chemical Engineering and Science 2012年第1期2卷 180-186页

作者： Ibrahim Mohammed El-Naggar Gehan Mohammed Ibrahim Eman Ahmed El-Kady 不详

A two new hybrid “organic-inorganic” composite ion exchangers (SAM and FAM), was synthesized by the combination of inorganic ion exchanger tin (IV) silicate and tin (IV) antimonate respectively with organic polymer polyacrylamide (PAm). The sorption isotherms for Cs+, Co2+, Sr2+ and Cd2+ ions on composite ion exchanger were investigated in the range (0.0005 - 0.01M) at different reaction temperature (30℃, 45℃ and 60℃ ± 1℃). The sorption data were subjected to different sorption isotherms and the results verified that Langmuir isotherm is the best model to be applied, and the monolayer sorption capacity were calculated and was found to increase as the reaction temperature increases.

关键词： Organic-Inorganic Composite Polyacrylamide Tin (IV) Silicate Tin (IV) antimonate Radioactive Waste Heavy Metals Sorption Isotherm Capacity

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