An Efficient Noble-Metal-Free Photocatalyst for Visible-Light-Driven H2 Evolution: Cu/Ni-Codoped Cd0.5Zn0.5S Nanoplates

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• 作者：Yanjie Hao ; Shi-Zhao Kang ; Xing Liu ; Xiangqing Li ; Lixia Qin ; Jin Mu
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2017
• 出版时间：January 3, 2017
• 年：2017
• 卷：5
• 期：1
• 页码：1165-1172
• 全文大小：444K
• ISSN：2168-0485

文摘

In the present work, Cu/Ni-codoped Cd<sub>05sub>Zn<sub>0.5sub>S nanoplates were synthesized through a one-step hydrothermal process. Meanwhile, photocatalytic H<sub>2sub> evolution from water over the as-prepared Cu/Ni-codoped Cd<sub>0.5sub>Zn<sub>0.5sub>S nanoplates was investigated under visible irradiation using Na<sub>2sub>S and Na<sub>2sub>SO<sub>3sub> as sacrificial reagents. The results indicate that the as-prepared Cu/Ni-codoped Cd<sub>0.5sub>Zn<sub>0.5sub>S nanoplates are an efficient photocatalyst for visible-light-driven H<sub>2sub> evolution from water, and there exists obvious synergy effect between Cu and Ni dopants. The photocatalytic activity of the Cd<sub>0.5sub>Zn<sub>0.5sub>S nanoplates can be significantly enhanced due to the introduction of Cu and Ni. Under optimal conditions, the H<sub>2sub> evolution rate over the Cu/Ni-codoped Cd<sub>0.5sub>Zn<sub>0.5sub>S nanoplates is up to 58.33 mmol h<sup>–1sup> g<sup>–1sup>, which is 3.5 times higher than that over the pure Cd<sub>0.5sub>Zn<sub>0.5sub>S nanoplates. Finally, the photocatalytic mechanism was preliminarily discussed.