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Design and Preparation of a CeVO4/Zn0.5Cd0.5S S-Scheme Heterojunction for Efficient Photocatalytic Hydrogen Evolution
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2022-02-09 , DOI: 10.1021/acsaem.1c03967
Hai Liu 1 , Yueyang Zhang 1 , Dujuan Li 1 , Youji Li 2 , Zhiliang Jin 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2022-02-09 , DOI: 10.1021/acsaem.1c03967
Hai Liu 1 , Yueyang Zhang 1 , Dujuan Li 1 , Youji Li 2 , Zhiliang Jin 1
Affiliation
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Improving the separation efficiency of photoinduced electron–hole pairs plays a vital role in preparing high-performance photocatalysts. Here, based on the good light corrosion resistance and excellent visible light response of Zn0.5Cd0.5S, as well as the unique catalytic, optical, and electrical properties of CeVO4, we tightly loaded CeVO4 on Zn0.5Cd0.5S by physical coupling to overcome its severe photogenic carrier recombination and obtained a highly efficient photocatalytic catalyst for hydrogen evolution. One the one hand, the close coupling of Zn0.5Cd0.5S and CeVO4 effectively inhibited the serious aggregation of Zn0.5Cd0.5S, which is conducive to the generation of active sites. On the other hand, an S-scheme heterojunction at the contact interface of Zn0.5Cd0.5S and CeVO4 was successfully built. The formation of the S-scheme heterojunction could consume useless electrons and holes and enable the efficient use of photogenerated electrons to participate in the reaction of reducing water. Finally, the hydrogen yield of Zn0.5Cd0.5S/CeVO4 can reach 695.55 μmol in 5 h. Our work provided an idea for the rational design of heterojunction photocatalysts to obtain excellent hydrogen production performance.
中文翻译：
用于高效光催化析氢的 CeVO4/Zn0.5Cd0.5S S 型异质结的设计与制备
提高光生电子-空穴对的分离效率对于制备高性能光催化剂起着至关重要的作用。在此，基于Zn 0.5 Cd 0.5 S良好的耐光腐蚀性和优异的可见光响应，以及CeVO 4 独特的催化、光学和电学性能，我们通过物理方法将CeVO 4紧密负载在Zn 0.5 Cd 0.5 S 上。耦合以克服其严重的光生载流子复合并获得高效的析氢光催化催化剂。一方面，Zn 0.5 Cd 0.5 S 和 CeVO 4的紧密耦合有效抑制了Zn 0.5 Cd 0.5 S的严重聚集，有利于活性位点的产生。另一方面，在Zn 0.5 Cd 0.5 S和CeVO 4的接触界面处成功构建了S型异质结。S型异质结的形成可以消耗无用的电子和空穴，使光生电子能够有效地参与还原水的反应。最后，Zn 0.5 Cd 0.5 S/CeVO 4的氢产率5 h 可达到 695.55 μmol。我们的工作为异质结光催化剂的合理设计以获得优异的制氢性能提供了思路。
更新日期：2022-02-09
中文翻译：
用于高效光催化析氢的 CeVO4/Zn0.5Cd0.5S S 型异质结的设计与制备
提高光生电子-空穴对的分离效率对于制备高性能光催化剂起着至关重要的作用。在此，基于Zn 0.5 Cd 0.5 S良好的耐光腐蚀性和优异的可见光响应，以及CeVO 4 独特的催化、光学和电学性能，我们通过物理方法将CeVO 4紧密负载在Zn 0.5 Cd 0.5 S 上。耦合以克服其严重的光生载流子复合并获得高效的析氢光催化催化剂。一方面，Zn 0.5 Cd 0.5 S 和 CeVO 4的紧密耦合有效抑制了Zn 0.5 Cd 0.5 S的严重聚集，有利于活性位点的产生。另一方面，在Zn 0.5 Cd 0.5 S和CeVO 4的接触界面处成功构建了S型异质结。S型异质结的形成可以消耗无用的电子和空穴，使光生电子能够有效地参与还原水的反应。最后，Zn 0.5 Cd 0.5 S/CeVO 4的氢产率5 h 可达到 695.55 μmol。我们的工作为异质结光催化剂的合理设计以获得优异的制氢性能提供了思路。
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