Photocatalytic energy storage ability of TiO_2-WO_3 composite prepared by wet-chemical technique  

作　　者：Linglin Cao, Jian Yuan, Mingxia Chen, Wenfeng Shangguan Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, China. 

出　　处：《Journal of Environmental Sciences》2010年第3期454-459,共6页环境科学学报（英文版）

基　　金：supported by the National Basic Research Program of China (973 Program) (No. 2007CB613305);the National High Technology Research and Development Program of China (863 Program) (No. 2007AA061405);the Special Foundation of Nanometer Technology(No. 0752nm005) from Shanghai Municipal Science and Technology Commission (STCSM) of China

摘　　要：TiO2-WO3 hybrid photocatalysts were prepared using wet-chemical technique, and their energy storage performance was characterized by electrochemical galvanostatic method. TiO2 powder was coupled with WO3 powder, which was used as electron pool and the reductive energy could be stored in. As a result, the prepared TiO2-WO3 had good energy storage ability while pure TiO2 showed no capacity and pure WO3 showed quite low performance. The energy storage ability was affected by the crystal structure of WO3 and calcination temperature. The photocatalyst had better capacity when WO3 had low degree of crystallinity, since its loose structure made it easier for electrons and cations to pass through. The photocatalytic energy storage performance was also affected by the molar ratio of TiO2 to WO3. Energy storage capacity was significantly dependent on the composition, reaching the maximum value at TiO2/WO3 1：1 （mol/mol）.TiO2-WO3 hybrid photocatalysts were prepared using wet-chemical technique, and their energy storage performance was characterized by electrochemical galvanostatic method. TiO2 powder was coupled with WO3 powder, which was used as electron pool and the reductive energy could be stored in. As a result, the prepared TiO2-WO3 had good energy storage ability while pure TiO2 showed no capacity and pure WO3 showed quite low performance. The energy storage ability was affected by the crystal structure of WO3 and calcination temperature. The photocatalyst had better capacity when WO3 had low degree of crystallinity, since its loose structure made it easier for electrons and cations to pass through. The photocatalytic energy storage performance was also affected by the molar ratio of TiO2 to WO3. Energy storage capacity was significantly dependent on the composition, reaching the maximum value at TiO2/WO3 1：1 （mol/mol）.

关 键 词：PHOTOCATALYST TiO2-WO3 energy storage 

分 类 号：O614.411[理学—无机化学]