Improved Photocatalytic Activity of Porous In2O3 by co-Modifying Nanosized CuO and Ag with Synergistic Effects  

作　　者：LI Xianglin ZHANG Qingyang LI Bin LI Zhijun ZHANG Ziqing JING Liqiang 

机构地区：[1]Laboratory of Functional Inorganic Materials Chemistry,Ministry of Education,School of Chemistry and Materials Science,International Joint Research Center for Catalytic Technology,Heilongjiang University,Harbin 150080,P.R.China

出　　处：《Chemical Research in Chinese Universities》2020年第6期1116-1121,共6页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.U1805255,21905080);the Basic Researceh Fund of Heilongiang University,China(No.RCCXY1201808).

摘　　要：Charge separation and oxygen activation are two crucial factors in the photocatalytic oxidation of pollutants.and it is meaningful to simultaneously enhance charge separation and promote O2 activation.Herein,it is demonstrated that the photocatalytic activity of porous In2O3is greatly improved after co-modifying nanosized CuO and Ag for oxidizing 2,4-dichlorophenol(2.4-DCP)and Co compared with that of individual In203.Based on the surface.photovoltage spectroscopy,02 temperature-programmed desorption,electron paramagnetic resonance spectroscopy and electrochemical results,the improved photoactivity is mainly attributed to the synergistic effects of enhancing photogenerated charge separation and promoting oxygen activation by respectively coupled nanosized CuO and Ag It is confirmed that the produced·O2^-radicals are dominant to induce the photocatalvtic oxidation of 2.4-DCP.This work offers an effective way to develop high-activity In203-based nanophotocatalysts for oxidizing pollutants.

关 键 词：Porous In2O3 Nanosized CuO and Ag co-modification Charge separation Oxygen activation Photocatalytic pollutant oxidation 

分 类 号：O644.1[理学—物理化学]