Influence of Sr-doping on the photocatalytic activities of CdS-ZnS solid solution photocatalysts
Influence of Sr-doping on the photocatalytic activities of CdS-ZnS solid solution photocatalysts
复制标题
Sr掺杂对CdS-ZnS固溶体光催化剂光催化活性的影响
DOI：
10.1016/j.ijhydene.2009.12.143
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发表时间：
2010-03-01
影响因子：
7.2
通讯作者：
Guo, Liejin
中科院分区：
文献类型：
--
作者：
Zhang, Kai;Jing, Dengwei;Guo, Liejin
首次将碱土金属Sr成功地掺杂到CdS-ZnS固溶体中，采用X射线衍射（XRD）、BET比表面积、紫外-可见漫反射光谱（UV-vis）、光致发光光谱（PL）、能量色散谱（EDS）、X射线光电子能谱（XPS）光催化放氢实验结果表明，当Zn的摩尔比大于20%时，Sr的掺杂可以有效地提高光催化活性在不存在贵金属作为助催化剂的情况下。详细研究了固溶体的Zn/Cd比与Sr掺杂量之间的相关性。结果表明，在CdS-ZnS的浅表面掺杂金属离子可以有效抑制光电子和空穴的复合，使其成为浅电子或空穴的中心陷阱，从而显着提高电荷分离效率（C）2009 T.版权所有© 2018 - 2019 Elsevier Inc.
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