Effects of iron salts on synthesis of MIL-100(Fe) and photocatalytic activity

ZHANG Yu; LIU Xiang-yue; MAO Hui-ling; WANG Chen; DU Xuan; CHENG Hu; ZHUANG Jin-liang

doi:10.11868/j.issn.1001-4381.2018.001261

Cailiao gongcheng (Mar 2019)

Effects of iron salts on synthesis of MIL-100(Fe) and photocatalytic activity

ZHANG Yu,
LIU Xiang-yue,
MAO Hui-ling,
WANG Chen,
DU Xuan,
CHENG Hu,
ZHUANG Jin-liang

Affiliations

ZHANG Yu: Key Laboratory of Functional Materials and Chemistry of Guizhou Province, School of Chemistry and Materials, Guizhou Normal University, Guiyang 550001, China
LIU Xiang-yue: Key Laboratory of Functional Materials and Chemistry of Guizhou Province, School of Chemistry and Materials, Guizhou Normal University, Guiyang 550001, China
MAO Hui-ling: Key Laboratory of Functional Materials and Chemistry of Guizhou Province, School of Chemistry and Materials, Guizhou Normal University, Guiyang 550001, China
WANG Chen: Key Laboratory of Functional Materials and Chemistry of Guizhou Province, School of Chemistry and Materials, Guizhou Normal University, Guiyang 550001, China
DU Xuan: Key Laboratory of Green Process and Engineering, CAS, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
CHENG Hu: Key Laboratory of Functional Materials and Chemistry of Guizhou Province, School of Chemistry and Materials, Guizhou Normal University, Guiyang 550001, China
ZHUANG Jin-liang: Key Laboratory of Functional Materials and Chemistry of Guizhou Province, School of Chemistry and Materials, Guizhou Normal University, Guiyang 550001, China

DOI: https://doi.org/10.11868/j.issn.1001-4381.2018.001261
Journal volume & issue: Vol. 47, no. 3
pp. 71 – 78

Abstract

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The iron salts (ferric and ferrous salts) play a critical role for the synthesis of morphology and size controllable, and highly crystalline MIL-100(Fe). The use of ferrous salt results in octahedral, highly crystalline MIL-100(Fe) with high surface areas. In contrast, the use of ferric salt only results in smaller Fe-BTC metal-organic polymers with low crystallinity. The crystal structure, morphology, photo-absorption property, absorption and photocatalytic-degradation properties of MIL-100(Fe) and Fe-BTC toward RhB, were fully characterized by XRD, SEM, FT-IR, UV-Vis DRS, and UV-Vis spectroscopy. The results indicate that the slow oxidation of Fe2+ to Fe3+ is key to the synthesis of highly crystalline MIL-100(Fe) since this process facilitates the formation of μ3-OFe(Ⅲ)O6, which is inorganic secondary building unit (SBU) of MIL-100(Fe). When FeCl3 used as iron source, the fast dynamic reaction of Fe3+ with BTC3- is not beneficial to the formation of μ3-OFe(Ⅲ)O6 SBU; therefore, Fe-BTC nanoparticle polymer is obtained. The smaller size of Fe-BTC nanoparticless, and meso-/macroporous structure in the aggregated nanoparticle surface, which facilitates the diffusion of RhB as well as the photodegradated forms. Fe-BTC shows better absorption capacity and photocatalytic activity toward RhB compared to MIL-100(Fe).

Published in Cailiao gongcheng

ISSN: 1001-4381 (Print)
Publisher: Journal of Materials Engineering
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: http://jme.biam.ac.cn/CN/1001-4381/home.shtml

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