Enhanced Photocatalytic Oxidation of Isopropanol by HKUST-1@TiO2 Core–Shell Structure with Ultrathin Anatase Porous Shell: Toxic Intermediate Control

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• 作者：Hongmei Wang ; Tao Yu ; Xin Tan ; Huabin Zhang ; Peng Li ; Huimin Liu ; Li Shi ; Xiangli Li ; Jinhua Ye
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：July 27, 2016
• 年：2016
• 卷：55
• 期：29
• 页码：8096-8103
• 全文大小：493K
• 年卷期：0
• ISSN：1520-5045

文摘

Poor adsorption of reactants and intermediates as well as low mineralization rate greatly restrict the application of common semiconductor photocatalyst TiO₂ for air purification. A plausible solution would be to integrate metal–organic frameworks (MOFs) materials with good gas adsorption property with traditional photocatalytic material TiO₂ with exciton generation. A core–shell structured photocatalyst with functional MOFs HKUST-1 (Cu₃(BTC)₂, BTC = 1,3,5 benzenetricarboxylate) as core and porous ultrathin anatase film as shell was synthesized. The composite photocatalyst was characterized in detail, and isopropanol degradation experiments were performed to evaluate the photocatalytic performances. The experimental results revealed that HKUST-1 can provide a special pathway for photogenerated electrons migration and thus restrain the recombination of electrons and holes to increase the photocatalytic efficiency. Furthermore, the capture of reactants and intermediates was also enhanced due to the unique MOFs-TiO₂ composite structure, and the mineralization rate had been markedly enhanced.