CoPtx-loaded Zn0.5Cd0.5S nanocomposites for enhanced visible light photocatalytic H-2 production
CoPtx-loaded Zn0.5Cd0.5S nanocomposites for enhanced visible light photocatalytic H-2 production
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负载 CoPtx 的 Zn0.5Cd0.5S 纳米复合材料用于增强可见光光催化 H-2 生产
DOI：
10.1002/er.3522
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发表时间：
2016
影响因子：
4.6
通讯作者：
Wang Hao
中科院分区：
文献类型：
--
作者：
Wang Hanbin;Li Yang;Shu Dan;Chen Xu;Liu Xiang;Wang Xina;Zhang Jun;Wang Hao
采用两步有机溶液法制备了Zn0.5Cd0.5S固溶体，并对其表面修饰了CoPtx纳米粒子。研究了不同CoPtx-Zn 0. 5Cd 0.5S纳米复合材料的光催化产氢性能。结果表明：1 wt% CoPt 3-Zn 0. 5Cd 0. 5S样品的光催化产氢活性最高，是纯Zn 0. 5Cd 0. 5S的4.7倍，是Pt-Zn 0. 5Cd 0.5S的1.2倍。Zn_（0.5）Cd_（0.5）S的瞬态光电流响应表明，负载CoPt_x后电流密度明显增加。电化学阻抗谱测试结果表明，当x = 2和3时，CoPtx-Zn 0. 5Cd 0.5S纳米复合材料具有比Pt-Zn 0. 5Cd 0.5S更低的电荷转移电阻Rt。CoPtx-Zn 0. 5Cd 0.5S纳米复合材料的光催化性能的提高归因于其更好的光激发电子积累能力和更高的电荷分离和传输速率。版权所有© 2016约翰威利父子有限公司.
Zn0.5Cd0.5S solid solution, modified with bimetallic CoPtxnanoparticles, has been prepared using a two‐step organic solution method. The photocatalytic H2production rate of CoPtx–Zn0.5Cd0.5S nanocomposites with different composition and percentage of CoPtxwas investigated. The results showed that the 1 wt% CoPt3–Zn0.5Cd0.5S sample had the best activity which was 4.7 times higher than that of pure Zn0.5Cd0.5S and 1.2 times higher than that of Pt–Zn0.5Cd0.5S for photocatalytic H2production. The transient photocurrent response of the Zn0.5Cd0.5S showed an obvious increase in the current density after CoPtxloading. Electrochemical impedance spectra measurements showed that the CoPtx–Zn0.5Cd0.5S nanocomposites withx= 2 and 3 had lower charge transfer resistance Rtthan that of Pt–Zn0.5Cd0.5S. The enhanced catalytic properties of the CoPtx–Zn0.5Cd0.5S nanocomposites are attributed to their better accumulation ability for photoexcited electrons and higher rate for charge separation and transportation. Copyright © 2016 John Wiley & Sons, Ltd.