异质结型AgI/AgBr/TiO2催化剂的制备及其光催化性能

doi:10.7517/j.issn.1674-0475.2010.05.334

影像科学与光化学 ›› 2010, Vol. 28 ›› Issue (5): 334-342.DOI: 10.7517/j.issn.1674-0475.2010.05.334

异质结型AgI/AgBr/TiO₂催化剂的制备及其光催化性能

曹静, 林海莉, 罗邦德, 李辰, 陈士夫

淮北师范大学, 化学与材料科学学院, 安徽, 淮北, 235000

收稿日期:2010-04-16 修回日期:2010-05-04 出版日期:2010-09-23 发布日期:2010-09-23
通讯作者: 陈士夫,E-mail:chshifu@chnu.edu.cn.
基金资助:
国家自然科学基金(20973071);安徽省教育厅自然科学基金(KJ2008B100ZC);安徽省“含能材料”省级重点实验室科研基金(KLEM2009013)资助项目

Preparation and Photocatalytic Property of Heterojunction AgI/AgBr/TiO₂ Catalyst

CAO Jing, LIN Hai-li, LUO Bang-de, LI Chen, CHEN Shi-fu

College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, P. R. China

Received:2010-04-16 Revised:2010-05-04 Online:2010-09-23 Published:2010-09-23

摘要/Abstract

摘要： 首先以沉积-沉淀法制备AgBr/TiO₂复合催化剂,然后采用离子交换法制备出新型的异质结型AgI/AgBr/TiO₂光催化剂.利用XRD和UV-Vis对AgI/AgBr/TiO₂光催化剂进行了表征.以甲基橙为染料模型,在可见光条件下(500 W、λ>420 nm)研究了AgI的含量对AgI/AgBr/TiO₂催化活性的影响.结果表明,AgI拓展了催化剂的吸收光谱范围;AgI生成量为AgBr的5%时,AgI/AgBr/TiO₂的催化活性最高.AgI/AgBr异质结的形成有利于光生电子和空穴的分离,提高AgI/AgBr/TiO₂的催化活性.

关键词: 光催化, 甲基橙, AgI/AgBr/TiO₂光催化剂

Abstract: A novel AgI/AgBr/TiO₂ photocatalyst was synthesized by ion exchange of AgBr/TiO₂ substrate prepared via deposition-precipitation method.AgI/AgBr/TiO₂ was characterized by XRD and UV-Vis.The photocatalytic activity of AgI/AgBr/TiO₂ was measured with methyl orange(MO) as dye model under the visible light condition(500 W,λ>420 nm).The results showed that AgI broadened the light absorption range of AgBr/TiO₂ catalyst in visible light area and raised the photocatalytic activity of AgBr/TiO₂.The maximum of photocatalytic activity of AgI/AgBr/TiO₂ could be obtained when the AgI formation was 5% of AgBr.AgI/AgBr heterojunction was beneficial to separate the photogenerated elections and holes and then raised the photocatalytic activity of AgI/AgBr/TiO₂.

Key words: photocatalysis, methyl orange, AgI/AgBr/TiO₂ photocatalyst

中图分类号:

曹静, 林海莉, 罗邦德, 李辰, 陈士夫. 异质结型AgI/AgBr/TiO₂催化剂的制备及其光催化性能[J]. 影像科学与光化学, 2010, 28(5): 334-342.

CAO Jing, LIN Hai-li, LUO Bang-de, LI Chen, CHEN Shi-fu. Preparation and Photocatalytic Property of Heterojunction AgI/AgBr/TiO₂ Catalyst[J]. Imaging Science and Photochemistry, 2010, 28(5): 334-342.

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异质结型AgI/AgBr/TiO₂催化剂的制备及其光催化性能

Preparation and Photocatalytic Property of Heterojunction AgI/AgBr/TiO₂ Catalyst

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