ISSN: 1003-6326
CN: 43-1239/TG

Vol. 25    No. 12    December 2015

In situ electrochemical synthesis of MOF-5 and its application inimproving photocatalytic activity of BiOBr
Hui-min YANG, Xian LIU, Xiu-li SONG, Tai-lai YANG, Zhen-hai LIANG, Cai-mei FAN
(College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
Abstract: Metal-organic frameworks (MOFs) are important functional materials. MOF-5 (IL) (Zn4O(BDC)3 (BDC=1,4-benzene- dicarboxylate) was in situ synthesized by the electrochemical method using a tunable ionic liquid (IL), 1-butyl-3-methylimidazolium chloride, as template. The crystallization of distinctly spherical MOF-5 (IL) synthsized in ionic liquid by the electrochemical method is attributed to π-π stacking effect, ionic bond, and coordination bond. The analysis results show that the product MOF-5(IL) exhibits better crystallinity and higher thermal stability than MOF-5 generated using the solvothermal method. The cyclic voltammetry reveals that the electrosynthesis reaction is irreversible and controlled by the diffusion. The experiments on methylorange degradation show that the unique structure characteristics of MOF-5(IL) can enhance the photocatalytic ability of BiOBr. Therefore, MOFs can replace noble metals to improve the photocatalytic properties of bismuth oxyhalide.
Key words: metal-organic framewok (MOF); ionic liquids template agent; in situ electrochemical synthesis; BiOBr; photocatalytic
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU)