Rare earth doped TiO2-CdS and TiO2-CdS composites with improvement of photocatalytic hydrogen evolution under visible light irradiation

被引：67
|
作者：
Peng, Shaoqin [1 ]
Huang, Yahui [1 ]
Li, Yuexiang [1 ]
机构：
[1] Nanchang Univ, Dept Chem, Nanchang 330031, Peoples R China
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2013年 / 16卷 / 01期
关键词：
Photocatalysis; Hydrogen evolution; Pt/RE/TiO2-CdS; Rare earth doping; NANOPARTICLES; DEGRADATION; GENERATION; TITANIA; FABRICATION; AIR;
D O I：
10.1016/j.mssp.2012.06.019
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we report the obtention of a series of rare earth doped composite Pt/RE/TiO2-CdS (RE=La3+, Eu3+, Er3+, Gd3+) and TiO2-CdS photocatalysts prepared by a simple mechanical mixed method. The photocatalysts properties were studied by means of ultraviolet-visible spectroscopy, photoluminiscence spectra, X-ray diffraction, transmission electron microscopy, specific surface areas and the electrochemistry method. Photocatalytic hydrogen evolution using Na2S/Na2SO3 as electron donor was investigated under visible-light (lambda >= 420 nm) irradiation. The rare earth doping enhances the activities of Pt/RE/TiO2-CdS samples (with 1.0 wt% deposited Pt). Under optimum conditions, the activities of La3+, Eu3+, Er3+, Gd3+ doped composite Pt/RE/TiO2-CdS increase by 62.0%, 40.4%, 34.7% and 30.0% respectively, when compared to that of Pt/TiO2-CdS, due to the prevention of electron-hole recombination and the flat-band potential of the conduction of TiO2 shifting negatively by the doping. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：62 / 69
页数：8
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