Influence of Sr-doping on the photocatalytic activities of CdS-ZnS solid solution photocatalysts

被引：130
作者：
Zhang, Kai [1 ]
Jing, Dengwei [1 ]
Chen, Qingyun [1 ]
Guo, Liejin [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shanxi Province, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Photocatalyst; Sr-doped; Charge transfer; Hydrogen production; VISIBLE-LIGHT IRRADIATION; HYDROGEN-PRODUCTION; H-2; EVOLUTION; WATER; ENERGY; TIO2; NATAO3; O-2;
D O I：
10.1016/j.ijhydene.2009.12.143
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：
Alkaline earth metal Sr was successfully doped into CdS-ZnS solid solutions for the first time The as-prepared photocatalysts were characterized by X-ray Diffraction (XRD), Brunauer-Emmett-Teller (BET) surface areas, UV-vis diffuse reflectance spectra (UV-vis), photoluminescence spectra (PL), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), etc BET characterization indicated that all the prepared samples possessed mesoporous structures with large specific surface areas Photocatalytic H-2 evolution results showed that Sr-doping can efficiently improve the photocatalytic activities while the molar ratio of Zn was greater than 20% in the absence of noble metal as co-catalyst. The correlation between the Zn/Cd ratio of solid solution and the Sr-doping amount was investigated in detail Results showed that the recombination of photoelectrons and holes could be efficiently suppressed by doping metal ions on the shallow surface of CdS-ZnS, which could become the centers of shallow electrons or holes traps, thus significantly improve the efficiency of charge separation (C) 2009 Professor T. Nejat Veziroglu Published by Elsevier Ltd All rights reserved
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收藏
页码：2048 / 2057
页数：10
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