Effect of dopant concentration on photocatalytic activity of TiO2 film doped by Mn non-uniformly

GIEC OpenIR > 中国科学院广州能源研究所

	Effect of dopant concentration on photocatalytic activity of TiO2 film doped by Mn non-uniformly
	Zhang KJ (Zhang, Kaijian); Xu W (Xu, Wei); Li XJ (Li, Xinjun); Zheng SJ (Zheng, Shaojian); Xu G (Xu, Gang)
	2006
发表期刊	CENTRAL EUROPEAN JOURNAL OF CHEMISTRY
卷号	4 期号:2 页码:234-245
通讯作者	lixj@ms.giec.ac.cn
其他摘要	The thin films of TiO2 doped by Mn non-uniformly were prepared by sol-gel method under process control. In our preceding study, we investigated in detail, the effect of doping mode on the photocatalytic activity of TiO2 films showing that Mn non-uniform doping can greatly enhance the activity. In this study we looked at the effect of doping concentration on the photocatalytic activity of the TiO2 films. In this paper, the thin films were characterized by UV-vis spectrophotometer and electrochemical workstation. The activity of the photocatalyst was also evaluated by photocatalytic degradation rate of aqueous methyl orange under UV radiation. The results illustrate that the TiO2 thin film doped by Mn non-uniformly at the optimal dopant concentration (0.7 at %) is of the highest activity, and on the contrary, the activity of those doped uniformly is decreased. As a comparison, in 80 min, the degradation rate of methyl orange is 62 %, 12 % and 34 % for Mn non-uniform doping film (0.7 at %), the uniform doping film (0.7 at %) and pure titanium dioxide film, respectively. We have seen that, for the doping and the pure TiO2 films, the stronger signals of open circuit potential and transient photocurrent, the better photocatalytic activity. We also discusse the effect of dopant concentration on the photocatalytic activity of the TiO2 films in terms of effective separation of the photon-generated carriers in the semiconductor. (C) Versita Warsaw and Springer-Verlag Berlin Heidelberg. All rights reserved.
关键词	Tio2 Mn Dopant Concentration Non-uniform Thin-films Titanium-dioxide Nanoparticles Degradation Property
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/3514
专题	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Zhang KJ ,Xu W ,Li XJ ,et al. Effect of dopant concentration on photocatalytic activity of TiO2 film doped by Mn non-uniformly[J]. CENTRAL EUROPEAN JOURNAL OF CHEMISTRY,2006,4(2):234-245.
APA	Zhang KJ ,Xu W ,Li XJ ,Zheng SJ ,&Xu G .(2006).Effect of dopant concentration on photocatalytic activity of TiO2 film doped by Mn non-uniformly.CENTRAL EUROPEAN JOURNAL OF CHEMISTRY,4(2),234-245.
MLA	Zhang KJ ,et al."Effect of dopant concentration on photocatalytic activity of TiO2 film doped by Mn non-uniformly".CENTRAL EUROPEAN JOURNAL OF CHEMISTRY 4.2(2006):234-245.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Effect of dopant con（618KB）			开放获取	CC BY-NC-SA	浏览下载