Sulfur vacancies engineered over Cd0.5Zn0.5S by Yb3+/Er3+ co-doping for enhancing photocatalytic hydrogen evolution
Sulfur vacancies engineered over Cd0.5Zn0.5S by Yb3+/Er3+ co-doping for enhancing photocatalytic hydrogen evolution
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DOI：
10.1039/d1se01384j
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发表时间：
2021-10-08
影响因子：
5.6
通讯作者：
Yu, Changlin
中科院分区：
文献类型：
--
作者：
Mu, Ping;Zhou, Man;Yu, Changlin
Using ion doping to engineer sulfur vacancies over metal sulfides is an effective method to improve photocatalytic properties, such vacancies form the center of the electron-captured state to promote the separation and transfer of photogenerated carriers. In this research, Yb/Er co-doped bulk Cd0.5Zn0.5S (CZS) was fabricated by a one-step simple hydrothermal process, and used for evaluating the catalytic activity for aquatic hydrogen production under visible light irradiation. The results showed that the Cd0.5Zn0.5S:Yb(15%), Er obtained exhibited a higher efficient photocatalytic activity of hydrogen evolution, in which the efficiency of Cd0.5Zn0.5S:Yb(15%), Er (422.0 mu mol g(-1) h(-1)) was 2.7 times higher than that of bare Cd0.5Zn0.5S (154.7 mu mol g(-1) h(-1)). This can be attributed to the augmented active surface area, the broadened spectral absorption of visible light and the facilitation of the separated efficiency of the photogenerated carriers. This finding provides a simple way to activate the metal-chalcogenides with S-vacancies for optimizing the photocatalytic performance.
