Preparation and visible-light activity of silver vanadate for the degradation of pollutants

被引：62

作者：

Hu, Xuexiang ^{[1
]}

Hu, Chun ^{[1
]}

Qu, Jiuhui ^{[1
]}

机构：

[1] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Semiconductors; Chemical synthesis; Catalytic properties; Crystal structure;

D O I：

10.1016/j.materresbull.2007.11.022

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

Monoclinic structure silver vanadate Ag3VO4 Was prepared by hydrothermal process. The effects of the ratio of silver to vanadium in starting material, hydrothermal temperature on surface morphologies, structure and photoactivity of Ag3VO4 for the decolorization azodye acid red B under visible irradiation were investigated. The Ag3VO4 prepared in the excess vanadium at 160 degrees C for 48 h exhibited highest visible-light-driven activity. Excess vanadium in the preparation increased the crystallinity and suppressed the formation of grain boundaries, while the formation of Ag-0 on the surface of the catalyst promoting the electron-hole separation and interfacial charge transfer, resulting in an increase in the photocatalytic activity. Furthermore, the activity of the Ag3VO4 was increased by 11 times when NiO was loaded, which also shows high activities for the decomposition of phenol and aniline. It is possible due to the formation of a short-circuited microphotoelectrochemical cell enhancing the separation of photogenerated electron-hole pairs. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2986 / 2997

页数：12

共 24 条

[1]

The design and development of highly reactive titanium oxide photocatalysts operating under visible light irradiation [J].