Enhancement of Photocatalytic Water Oxidation Activity on IrOx-ZnO/Zn2-xGeO4-x-3yN2y Catalyst with the Solid Solution Phase Junction

被引：71

作者：

Ma, Baojun ^{[1
]}

Yang, Jinhui ^{[1
]}

Han, Hongxian ^{[1
]}

Wang, Jiantao ^{[2
]}

Zhang, Xiaohong ^{[2
]}

Li, Can ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

[2] Chinese Acad Sci, Tech Inst Phys & Chem, Nanoorgan Photoelect Lab, Beijing 100190, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 29期

关键词：

SHUTTLE REDOX MEDIATOR; ZINC GERMANIUM OXYNITRIDE; VISIBLE-LIGHT IRRADIATION; Z-SCHEME; SPLITTING SYSTEM; PHOTOSYSTEM-II; O-2; H-2; TIO2; (ZN1+XGE)(N2OX);

D O I：

10.1021/jp103722j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

A three-component photocatalyst IrOx-ZnO/Zn2-xGeO4-x-3yN2y was designed and investigated for photocatalytic O-2 production under visible light irradiation. It was found that loading of IrOx or ZnO alone could efficiently improve the photocatalytic activity. The even higher photocatalytic activity was achieved by coloading of IrOx and ZnO on Zn2-xGeO4-x-3yN2y, which was about 5.6 times that of Zn2-xGeO4-x-3yN2y alone. The photocatalysts simultaneously coloaded with IrOx and ZnO on Zn2-xGeO4-x-3yN2y showed higher photocatalytic activities than those coloaded with IrOx and ZnO sequentially. The high resolution transmission electron microscopy (HETEM) characterization showed that a solid solution phase junction (SSPJ) was possibly formed at the interface of ZnO and Zn2-xGeO4-x-3yN2y nanaoparticles. This phase junction formed between ZnO and Zn2-xGeO4-x-3yN2y may promote the charge separation and consequently result in the enhanced photocatalytic activity.

引用

页码：12818 / 12822

页数：5

共 27 条

[1]

A new type of water splitting system composed of two different TiO2 photocatalysts (anatase, rutile) and a IO3-/I- shuttle redox mediator [J].