Physical and photocatalytic properties of zinc ferrite doped titania under visible light irradiation

被引：57

作者：

Ping, C ^{[1
]}

Wei, L ^{[1
]}

Zhou, TL ^{[1
]}

Jin, YP ^{[1
]}

Gu, MY ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab MMCs, Shanghai 200030, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2004年 / 168卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

photocatalyst; visible light; titania; zinc ferrite; methyl orange;

D O I：

10.1016/j.jphotochem.2004.05.018

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：

Visible light responsive zinc ferrite doped titania photocatalyst (TiO2(ZnFe2O4)) was prepared by sol-gel method and was calcined at different temperatures. Diffuse reflectance spectroscopy (DRS) results show that the absorption edge of TiO2(ZnFe2O4) has moved to the visible spectrum range in comparison with the undoped titania. The photocatalytic experimental result demonstrates that TiO2(ZnFe2O4) powder can effectively photodegrade methyl orange (MO) under visible light irradiation. Effect of calcination temperature on the photocatalytic activity of TiO2(ZnFe2O4) was also investigated. Zeta potential measurements indicate that the isoelectric point (IEP) of the TiO2(ZnFe2O4) powder shifts to lower pH units with the increase of calcination temperature. Brunauer-Emmett-Teller (BET) surface area decreases with the rise of calcination temperature. It is concluded that the surface charge and BET surface area are the key factors for the higher photoactivity of zinc ferrite doped titania photocatalyst calcined at 400 degreesC. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：97 / 101

页数：5

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