Cu2MoS4/CdS 纳米片改性纳米线纳米复合材料可显着提高可见光驱动的光催化析氢活性,Energy & Fuels

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Cu2MoS4/CdS 纳米片改性纳米线纳米复合材料可显着提高可见光驱动的光催化析氢活性
Energy & Fuels ( IF 5.2 ) Pub Date : 2023-08-16 , DOI: 10.1021/acs.energyfuels.3c01854
Yanfei Zhao ₁ , Qi Wang ₁ , Congrong Lu ₁ , Kuankuan Ren ₁ , Shiyan Liu ₁ , Chunhe Li ₁ , Wei-Dong Dou ₁

Affiliation

开发具有高电荷分离效率和可见光捕获能力的光催化剂仍然是一个巨大的挑战。_{在这项工作}中，我们报告了一种简单的水热处理方法，用助催化剂Cu ₂ MoS ₄纳米片（NSs）装饰CdS纳米线（NWs），用于光催化析氢反应（HER）。_{特别是当Cu 2} MoS ₄与CdS的摩尔比为3%时，Cu ₂ MoS ₄ /CdS表现出优异的可见光驱动的H ₂析出活性（1967.83 μmol g ^–1 h ^–1），比纯CdS高18.8倍。_{结构表征证明了 Cu 2} MoS ₄ /CdS的精心设计的结构，其中 Cu ₂ MoS ₄ NS 紧密附着在 CdS NW 上形成异质结。光学性能表明3%-Cu ₂ MoS ₄ /CdS纳米复合材料表现出优异的可见光吸收能力。结合光致发光光谱、光电流和电化学阻抗谱的数据分析，可以证明3%-Cu 2 MoS 4 中光生电子空穴对存在_有效分离_。/CdS 纳米复合材料。所有这些因素协同提高了Cu ₂ MoS ₄ /CdS的光催化析氢性能，为高效可见光驱动硫化物光催化剂的合理设计提供了新概念_。

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Cu2MoS4/CdS Nanosheet-Modified Nanowire Nanocomposites for Significantly Improved Visible Light-Driven Photocatalytic H2 Evolution Activity

The development of photocatalysts with high charge separation efficiency and visible-light-harvesting capacity is still a great challenge. In this work, we report a simple hydrothermal treatment to decorate the CdS nanowires (NWs) with co-catalyst Cu₂MoS₄ nanosheets (NSs) for photocatalytic H₂ evolution reaction (HER). Especially when the molar ratio of Cu₂MoS₄ to CdS is 3%, the Cu₂MoS₄/CdS shows excellent visible light-driven H₂ evolution activity (1967.83 μmol g^–1 h^–1), which is 18.8 times higher than that of pure CdS. Structural characterizations demonstrate a well-designed structure of the Cu₂MoS₄/CdS, in which Cu₂MoS₄ NSs are tightly attached onto the CdS NWs to form a heterojunction. The optical property reveals that the 3%-Cu₂MoS₄/CdS nanocomposite displayed distinguished visible-light absorption capacity. Combined with the data analysis of the photoluminescence spectra, photocurrents, and electrochemical impedance spectra, it can be proved that there is effective separation of photogenerated electron–hole pairs in 3%-Cu₂MoS₄/CdS nanocomposite. All these factors synergistically boost the photocatalytic H₂ evolution performance of the Cu₂MoS₄/CdS, providing a new concept for the rational design of highly efficient visible-light-driven sulfide photocatalysts.

更新日期：2023-08-16

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