化工进展

• 研究开发 • 上一篇    下一篇

N、S共掺杂改性TiO2的制备及其光催化活性

张兰河,刘丽丹,陈子成,于大禹   

  1. 东北电力大学化学工程学院

  • 出版日期:2008-10-05 发布日期:2008-10-05

Preparation and photocatalytic activity of TiO2 co-doped with nitrogen and sulfur

ZHANG Lanhe,LIU Lidan,CHEN Zicheng,YU Dayu   

  1. School of Chemical Engineering,Northeast Dianli University

  • Online:2008-10-05 Published:2008-10-05

摘要: 采用焙烧法制备了具有可见光催化活性的光催化剂SxTi1-xN2-yOy。光电子能谱结果表明SxTi1-xN2-yOy中S是以+6价阳离子的形式存在,其掺杂方式是置换了晶格金属离子Ti4+形成阳离子S6+的掺杂;且由于S6+阳离子的存在,导致N1s出现宽化移动现象,N在掺杂过程中形成了N—C、N—S、N—O及Ti—N键。紫外-可见漫反射及表面光电压谱研究结果表明,SxTi1-xN2-yOy吸收带边为528 nm,对应的带-带跃迁能量为2.3 eV,具有明显的可见光催化活性,SxTi1-xN2-yOy仍为n型半导体。模拟太阳光下的光催化降解苯甲酸试验表明,SxTi1-xN2-yOy在可见光下具有很好的光催化活性,是未改性TiO2的2.8倍。

Abstract: A new kind visible-light responsive photocatalyst SxTi1-xN2-yOy was prepared by calcination. The SxTi1-xN2-yOy catalyst was characterized by X-ray photoelectron spectroscopy (XPS),UV-vis absorption spectra and surface photovoltage spectroscopy (SPS). It was found that S (S6+) substituted some of the lattice titanium atoms in SxTi1-xN2-yOy,and the N was doped in the form of N—C,N—S,N—O and Ti—O bonds. The SxTi1-xN2-yOy was still n-type semiconductor and the light absorption onset of SxTi1-xN2-yOy was shifted to the visible region at 528nm. The photocatalytic decomposition of benzoic acid solution was carried out under simulated sun light; the photocatalytic activity of SxTi1-xN2-yOy was 2.8 times of TiO2.

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn