Microwave-assisted hydrothermal synthesis of cube-like Ag-Ag_2MoO_4 with visible-light photocatalytic activity  

作　　者：LI ZhaoQian CHEN XueTai XUE Zi-Ling 

机构地区：[1]State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University [2]Department of Chemistry, The University of Tennessee, Knoxville

出　　处：《Science China Chemistry》2013年第4期443-450,共8页中国科学（化学英文版）

基　　金：supported by the National Basic Research Program of China (2013CB922102);the National Natural Science Foundation of China(21021062);the US National Science Foundation (CHE-1012173)

摘　　要：Cube-like Ag-Ag2MoO4 composite has been successfully prepared in the presence of PVP （potyvinylpyrrolidone） via a facile microwave-assisted hydrothermal process. Studies of its photocatalytic performance in the decomposition of RhB indicate that the cube-like Ag-Ag2MoO4 composite exhibits good catalytic activities under visible-light irradiation. The face that Ag pro- motes the absorption of visible light may be attributed to the surface plasmon resonance. Further XRD characterization after recycle photocatalytic tests confirms that partial Ag~ ions in Ag2MoO4 have been reduced to metallic Ag. Reaction temperature, reaction time and the amount of PVP have also been studied and found to play crucial roles in the formation of the cube-like microstructures.Cube-like Ag-Ag2MoO4 composite has been successfully prepared in the presence of PVP (polyvinylpyrrolidone) via a facile microwave-assisted hydrothermal process. Studies of its photocatalytic performance in the decomposition of RhB indicate that the cube-like Ag-Ag2MoO4 composite exhibits good catalytic activities under visible-light irradiation. The face that Ag promotes the absorption of visible light may be attributed to the surface plasmon resonance. Further XRD characterization after recycle photocatalytic tests confirms that partial Ag + ions in Ag2MoO4 have been reduced to metallic Ag. Reaction temperature, reaction time and the amount of PVP have also been studied and found to play crucial roles in the formation of the cube-like microstructures.

关 键 词：microwave HYDROTHERMAL photocatalytic activity surface plasmon resonance 

分 类 号：O643.36[理学—物理化学]