物理化学学报 >> 2022, Vol. 38 >> Issue (12): 2201037.doi: 10.3866/PKU.WHXB202201037

所属专题: 纪念傅鹰先生诞辰120周年

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In2O3修饰三维纳米花MoSx构建S型异质结用于高效光催化产氢

李红英, 龚海明, 靳治良()   

  • 收稿日期:2022-01-23 录用日期:2022-03-15 发布日期:2022-03-22
  • 通讯作者: 靳治良 E-mail:zl-jin@nun.edu.cn
  • 基金资助:
    宁夏回族自治区自然科学基金(2020AAC02026)

In2O3-Modified Three-Dimensional Nanoflower MoSx Form S-scheme Heterojunction for Efficient Hydrogen Production

Hongying Li, Haiming Gong, Zhiliang Jin()   

  • Received:2022-01-23 Accepted:2022-03-15 Published:2022-03-22
  • Contact: Zhiliang Jin E-mail:zl-jin@nun.edu.cn
  • About author:Zhiliang Jin, Email: zl-jin@nun.edu.cn. Tel.: +86-13893316102
  • Supported by:
    the Natural Science Foundation of the Ningxia Hui Autonomous Region, China(2020AAC02026)

摘要:

形貌控制和异质结构建是提升光催化剂性能的有效策略。本文采用In2O3修饰三维纳米花MoSx并构建S型异质结,为电子的传输提供了特殊的转移途径。通过合理调控In2O3的负载量,MoSx/In2O3的最佳产氢速率能够达到6704.2 μmol∙g−1∙h−1,是纯MoSx的1.8倍。采用荧光光谱和电化学测试证实复合材料中内部电子和空穴对的分离效率得到了有效的提升,并利用紫外漫反射测试和羟基自由基实验推测了析氢机理。

关键词: 光催化, 异质结, MoSx, In2O3, 析氢

Abstract:

Morphology regulation and the improvement of carrier separation efficiency are important strategies for the preparation of photocatalysts with excellent performance. MoSx with a three-dimensional (3D) nanoflower morphology formed by nanosheet stacking was prepared by a simple hydrothermal method, and MoSx/In2O3 with good hydrogen evolution activity was obtained by coupling with In2O3. The preparation of the three-dimensional nanoflower morphology combined with the construction of an S-scheme heterojunction improves the electron accumulation at the active site for hydrogen evolution reaction. The UV diffuse reflection test showed that the issue of poor light absorption of In2O3 was improved. The rapid separation and transfer of electrons were effectively confirmed by characterization methods such as fluorescence spectroscopy and electrochemical tests. The most intuitively manifestation of the performance improvement of the composite material is that the optimal hydrogen evolution rate reached 6704.2 μmol∙g−1∙h−1, which is 1.8 times that of pure MoSx. Therefore, in this study, a new idea for the development of molybdenum-based sulfides for photocatalytic hydrogen production is provided.

Key words: Photocatalysis, Heterojunction, MoSx, In2O3, Hydrogen production

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