Tuning Cu dopant of Zn0.5Cd0.5S nanocrystals enables high-performance photocatalytic H2 evolution from water splitting under visible-light irradiation
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- 作者：Zongwei Meia ; 1Author Vitae ; Bingkai Zhanga ; 1Author Vitae ; Jiaxin ZhengaAuthor Vitae ; Sheng YuanaAuthor Vitae ; Zengqing Zhuoa ; bAuthor Vitae ; Xianguang MengcAuthor Vitae ; Zonghai ChendAuthor Vitae ; Khalil Aminea ; dAuthor Vitae ; Wanli Yanga ; bAuthor Vitae ; Lin.-Wang Wanga ; eAuthor Vitae ; Wei WangfAuthor Vitae ; Shufeng WangfAuthor Vitae ; Qihuang GongfAuthor Vitae ; Jun LigAuthor Vitae ; Fu.-Sheng LiuhAuthor Vitae ; Feng Pana ; Author Vitae
- 关键词：Cu dopant ; Zn0.5Cd0.5S ; Mechanism ; Photocatalytic H2 evolution ; Water splitting ; Visible light
- 刊名：Nano Energy
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：26
- 期：Complete
- 页码：405-416
- 全文大小：3209 K
文摘
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It was firstly found that the Cu2+ doping source turned into Cu+ after being doped into mesoporous Zn0.5Cd0.5S aggregated by nanocrystals.
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It was theoretically proposed that the Cu+ dopant resulted in the spontaneous formation of S vacancies (VS) in Zn0.5Cd0.5S.
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The Cu+ dopant and VS would construct trap level and attract photoexcited holes and electrons, respectively.
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Appropriate Cu-doped Zn0.5Cd0.5S nanocrystals reach the highest 21.4 mmol/h/g of H2 evolution rate without cocatalyst in the visible-light region, which is also 2.8 times as high as that of the undoped counterpart.