A comparative study on photoelectrochemical performance of TiO2 photoanodes enhanced by different polyoxometalates

被引：43

作者：

Sun, Zhixia ^{[1
]}

Li, Fengyan ^{[1
]}

Zhao, Mingliang ^{[1
]}

Xu, Lin ^{[1
]}

Fang, Shuna ^{[1
]}

机构：

[1] NE Normal Univ, Coll Chem, Minist Educ, Key Lab Polyoxometalates Sci, Changchun 130024, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2013年 / 30卷

基金：

中央高校基本科研业务费专项资金资助;

关键词：

Polyoxometalates; TiO2; Photoelectrochemical performance; Electron transport; Electron-hole recombination; TITANIUM-DIOXIDE; RECOMBINATION; EFFICIENCY; CIRCUIT; ACID;

D O I：

10.1016/j.elecom.2013.02.006

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Based on the incorporation of polyoxometalates (POMs) into TiO2 film, the photoelectrochemical performance of POMs/TiO2 anode was elucidated by comparative investigation on the electron transport and electron-hole recombination in POMs/TiO2 anode. The photoelectrochemical performance of the POMs/TiO2 anode was clearly dependent on the type and content of POMs. Compared to the TiO2 anode, the POMs/TiO2 anode with low POMs loadings (0.75%) displayed the enhanced photoelectrochemical performance, while the excessive content (7.5%) of POMs could almost cause a negative effect. Thus, POMs could act as either "shallow electron trap" or "deep electron trap" depending on the different types and contents of POMs. This study reveals that the introduction of POMs into TiO2 anode could facilitate photogenerated electron transfer and reduce electron-hole recombination, which is urgently desired to develop advanced composite materials of POMs/TiO2 for application in photoelectrochemical catalysis and solar cells. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：38 / 41

页数：4

共 21 条

[1] Tungstophosphoric acid supported on polycrystalline TiO2 for the photodegradation of 4-nitrophenol in aqueous solution and propan-2-ol in vapour phase [J].