Highly active V-TiO2 for photocatalytic degradation of methyl orange

被引：65

作者：

Liu, Song ^{[1
]}

Xie, Tianhua ^{[1
]}

Chen, Zhi ^{[1
]}

Wu, Jiantao ^{[1
]}

机构：

[1] S China Univ Technol, Dept Appl Chem, Guangzhou 510640, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2009年 / 255卷 / 20期

关键词：

Titania; Vanadium; Doping; Photocatalysis; p-n junction; Semiconductor; VISIBLE-LIGHT IRRADIATION; NANOSTRUCTURED TITANIUM-DIOXIDE; VANADIUM-DOPED TIO2; POLYCRYSTALLINE TIO2; THIN-FILM; COMPOSITE; OXIDATION; PARTICLES; PHOTOOXIDATION; HETEROJUNCTION;

D O I：

10.1016/j.apsusc.2009.06.029

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：

Two kinds of vanadium-doped TiO2 powders photocatalysts were prepared by sol-gel method in even doping and uneven doping modes, and were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV-vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity of TiO2 photocatalysts doped by vanadium evenly with lower dopant level up to 0.002 mol.% is better than that of undoped TiO2, while with higher dopant level the activity is worse. TiO2 photocatalysts doped by vanadium unevenly with a p-n junction semiconductor structure, was shown to have a much higher photocatalytic destruction rate than that of TiO2 photocatalysts doped by vanadium evenly and undoped TiO2, which is ascribed mainly to the electrostatic-field-driven electron-hole separation in TiO2 particles doped by vanadium unevenly. (C) 2009 Elsevier B. V. All rights reserved.

引用

页码：8587 / 8592

页数：6