Cd0.5Zn0.5S/CoWO4 Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO2 Reduction,Inorganic Chemistry

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Cd0.5Zn0.5S/CoWO4 Nanohybrids with a Twinning Homojunction and an Interfacial S-Scheme Heterojunction for Efficient Visible-Light-Induced Photocatalytic CO2 Reduction
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-09-14 , DOI: 10.1021/acs.inorgchem.1c02146
Ping Mu ₁ , Man Zhou ₂ , Kai Yang _{1,

3,

4} , Xin Chen ₁ , Zhenzhen Yu ₁ , Kangqiang Lu ₁ , Weiya Huang ₁ , Changlin Yu ₃ , Wenxin Dai ₄

Affiliation

The construction of a phase junction photocatalyst can significantly enhance the photocatalytic performance with high selectivity for CO₂ reduction. In this study, an S-scheme junction Cd_0.5Zn_0.5S/CoWO₄ semiconductor with the coupling of a twin crystal Cd_0.5Zn_0.5S homojunction and CoWO₄ was designed through a hydrothermal method, which could convert CO₂ to CO with high efficiency under visible-light illumination. Cd_0.5Zn_0.5S–10%CoWO₄ exhibited the optimal performance and its CO yield and selectivity were up to 318.68 μmol·g^–1 and 95.90%, respectively, which were 4.54 and 1.62 times higher than that of twin crystal Cd_0.5Zn_0.5S. Moreover, the Cd_0.5Zn_0.5S homojunction with a zinc-blende and wurtzite phase and the S-scheme phase junction of Cd_0.5Zn_0.5S/CoWO₄ enhanced the property of CO₂ adsorption and accelerated the detachment of photogenerated carriers. The combination of photogenerated holes in Cd_0.5Zn_0.5S and the electrons of CoWO₄ can retain the reduction sites to improve photocatalytic performance. This study provides a neoteric concept and reference for the construction of the S-scheme phase junction.

中文翻译：

具有孪晶同质结和界面 S 型异质结的 Cd0.5Zn0.5S/CoWO4 纳米杂化物用于有效的可见光诱导光催化 CO2 还原

相结光催化剂的构建可以显着提高光催化性能，并且对CO ₂还原具有高选择性。在这项研究中，通过水热法设计了一种 S 型结 Cd _0.5 Zn _0.5 S/CoWO ₄半导体与双晶 Cd _0.5 Zn _0.5 S 同质结和 CoWO ₄的耦合，该半导体可以将 CO ₂转化为高可见光照明下的效率。Cd _0.5 Zn _0.5 S–10%CoWO ₄表现出最佳性能，CO产率和选择性高达318.68 μmol·g ^–1和 95.90%，分别是双晶 Cd _0.5 Zn _0.5 S 的4.54 和 1.62 倍。此外，具有闪锌矿和纤锌矿相的 Cd _0.5 Zn _0.5 S 同质结以及 Cd 的 S 型相结_0.5 Zn _0.5 S/CoWO ₄增强了CO ₂吸附性能，加速了光生载流子的脱离。Cd _0.5 Zn _0.5 S中光生空穴与CoWO ₄电子的结合可以保留还原位点以提高光催化性能。本研究为S-scheme相结的构建提供了一个新的概念和参考。

更新日期：2021-10-04

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