Photoinduced Electron Storage in WO3/TiO2 Nanohybrid Material in the Presence of Oxygen and Postirradiated Reduction of Heavy Metal Ions

被引：104

作者：

Zhao, Dan ^{[1
]}

Chen, Chuncheng ^{[1
]}

Yu, Cailan ^{[1
]}

Ma, Wanhong ^{[1
]}

Zhao, Jincai ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 30期

关键词：

TIO2-WO3 PHOTOCATALYSIS SYSTEMS; ENERGY-STORAGE; NANOCRYSTALLINE TIO2; VISIBLE IRRADIATION; TITANIUM-DIOXIDE; PARAMAGNETIC-RES; MECHANISM; KINETICS; LIGHT; FILMS;

D O I：

10.1021/jp9002774

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A bulk-embedded TiO2-based nanohybrid material with WO3 clusters as the electron storage sites was designed and prepared. Conduction band electrons generated upon excitation of TiO2 were successfully stored in this nanohybrid material in the presence of O-2, and the storage of electrons in WO3 clusters was further confirmed by the electron spin resonance (ESR) measurements. It is found that the reduction of oxygen on the surface of nanohybrid particles was much slower than that on pristine TiO2. Synthesis conditions were varied to optimize the storage behaviors of hybrid materials. The structure of the nanohybrid material was investigated using high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), Raman, and X-ray diffraction. Potential environmental application of this nanohybrid material for the reduction treatment of poisonous heavy metal ions without in situ light irradiation was explored.

引用

页码：13160 / 13165

页数：6

共 41 条

[1]

Bartlett R. J., 1996, Methods of soil analysis. Part 3 - chemical methods., P683

[2] Effect of transition metal ions on the TiO2-assisted photodegradation of dyes under visible irradiation:: A probe for the interfacial electron transfer process and reaction mechanism [J].