In situ Growth of NiS Nanoparticles on CdS Nanorods for Highly Efficient Photocatalytic Hydrogen Evolution

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-04-14 DOI:10.1007/s10562-025-05010-y

Xingyu Lu, Jiahao Sun, Pengfei Yang, Xianjun Yang, Qin Hu, Liuyun Chen, Zuzeng Qin, Tongming Su

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Abstract

CdS photocatalysts have attracted extensive attention in the area of photocatalytic hydrogen generation, yet their limited light absorption and charge transfer efficiencies still restrict their photocatalytic performance. In this study, NiS was grown on CdS to synthesize xNiS/CdS composites via a hydrothermal method and was used for photocatalytic hydrogen evolution. The introduction of NiS increased the light absorption intensity and broadened the light absorption range in the visible light region. In addition, a close contact interface formed between NiS and CdS, which accelerated the transfer and separation of photogenerated electrons and holes. Furthermore, NiS acts as the electron aggregation center and active site for photocatalytic hydrogen evolution. Therefore, the photocatalytic performance of the xNiS/CdS composites was greatly enhanced. Among the xNiS/CdS composites, the 0.5NiS/CdS composite exhibited the optimal photocatalytic hydrogen evolution rate of 36.75 mmol·h^− 1·g^− 1, which was 7.84 times greater than that of CdS. A possible mechanism of photocatalytic H₂ production over xNiS/CdS is also proposed. This work provides new inspiration for the rational design of high-efficiency cocatalyst/CdS composites.

Graphical Abstract

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在CdS纳米棒上原位生长NiS纳米颗粒用于高效光催化析氢

CdS光催化剂在光催化制氢领域受到了广泛的关注，但其有限的光吸收和电荷转移效率仍然制约着其光催化性能。本研究将NiS生长在CdS上，通过水热法合成xNiS/CdS复合材料，并用于光催化析氢。NiS的引入增加了光吸收强度，拓宽了可见光区的光吸收范围。此外，NiS与CdS之间形成了紧密的接触界面，加速了光生电子与空穴的转移与分离。此外，NiS作为电子聚集中心和光催化析氢的活性位点。因此，xNiS/CdS复合材料的光催化性能得到了极大的提高。在xNiS/CdS复合材料中，0.5NiS/CdS复合材料的最佳光催化析氢速率为36.75 mmol·h−1·g−1，是CdS的7.84倍。提出了xNiS/CdS光催化制氢的可能机理。本研究为高效助催化剂/CdS复合材料的合理设计提供了新的启示。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.