Construction of 1T-2H mixed-phase MoS2-coated CdS hollow sphere core-shell structure and study on its efficient photocatalytic hydrogen evolution performance

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-05-20 DOI:10.1016/j.vacuum.2025.114427

Shiyue Dang , Yuzheng Wang , Guimei Shi , Yusheng Wu , Laishi Li , Feng Liu , Jiahui Xing , Aoning Wen

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引用次数: 0

Abstract

CdS photocatalysts are promising for hydrogen production via water splitting but suffer from photocorrosion. In this study, 1T - 2H mixed - phase MoS₂ nanosheets were anchored on hollow CdS (H-CdS) as cocatalysts. The MoS₂ coating reduces direct contact between CdS and the solution, retarding corrosion. Additionally, its abundant active sites indirectly mitigate photocorrosion. The H-CdS/MoS₂-3 sample exhibited a hydrogen evolution reaction (HER) activity of 1520.82 μmol g⁻¹ h⁻¹, about 3 times that of H-CdS (567.51 μmol g⁻¹ h⁻¹), showing excellent photocatalytic performance. This improvement is due to 1T - phase MoS₂ acting as an electron-transfer bridge, accelerating electron migration. A 6h cyclic hydrogen evolution test confirmed that the H-CdS/MoS₂-3 nanocomposite had a cyclic efficiency of 95 %, demonstrating good stability.

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1T-2H混合相mos2包覆CdS空心球核壳结构的构建及其高效光催化析氢性能研究

CdS光催化剂是一种很有前途的水裂解制氢催化剂，但存在光腐蚀问题。本研究将1T - 2H混合相MoS2纳米片作为助催化剂锚定在空心CdS （H-CdS）上。MoS2涂层减少了CdS与溶液之间的直接接触，减缓了腐蚀。此外，其丰富的活性位点间接地减轻了光腐蚀。h - cds /MoS2-3样品的析氢反应（HER）活性为1520.82 μmol g−1 h−1，约为h - cds （567.51 μmol g−1 h−1）的3倍，具有优异的光催化性能。这种改善是由于1T相MoS2作为电子转移桥，加速电子迁移。6h循环析氢实验证实，H-CdS/MoS2-3纳米复合材料的循环效率为95%，具有良好的稳定性。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.