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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A facile synthesis of a ZIF-derived ZnS/ZnIn2S4 heterojunction and enhanced photocatalytic hydrogen evolution
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A facile synthesis of a ZIF-derived ZnS/ZnIn2S4 heterojunction and enhanced photocatalytic hydrogen evolution

机译：ZIF衍生的ZnS / Znin2S4异质结和增强的光催化氢进化的容易合成

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摘要

A facile synthetic route, by using rhombic dodecahedral zeolitic imidazolate framework-8 (ZIF-8) as the structure template, is devoted to fabricating the ZnS/ZnIn2S4 hybrid heterojunction; the compact heterostructure was produced by combining the sulfurization of ZIF-8 and the in situ precipitation of ZnIn2S4 in one pot. The resulting ZnS nanoparticles of about 100 nm were uniformly dispersed in the folds of flower-like ZnIn2S4, whose structure is beneficial for charge transfer at the heterointerface. The additional quantities of ZIF-8 are varied to find an optimum ratio of the two components to obtain the best photocatalytic activity. In the photocatalytic hydrogen generation irradiated by simulated solar light, all the ZnS/ZnIn2S4 hybrid photocatalysts displayed improved hydrogen production rates compared to single ZnS or ZnIn2S4, and the best hydrogen production rate of 453.4 mu mol h(-1) g(-1) is obtained by ZnS/ZIS-20, whose value is approximately 4 times higher than that of single ZnIn2S4. The electrochemical properties of the ZnS/ZnIn2S4 hybrid photocatalysts were measured to explore the charge transfer mode at the interface, and the band structure and enhanced photocatalytic hydrogen generation mechanism have been proposed. The excellent recycling properties of hydrogen production indicated the prospective applications of this kind of ZIF-derived metal sulfide in photocatalytic reactions.
机译：通过使用菱形十二型沸石咪唑酯框架-8（ZIF-8）作为结构模板，致专用于制造ZnS / Znin2S4杂交异质结;通过将ZIF-8的硫和在一个罐中的原位沉淀结合来制备紧凑的异质结构。得到的ZnS纳米颗粒约100nm均匀地分散在花状Znin2S4的褶皱中，其结构是有益于异偶表面的电荷转移。额外的ZIF-8的变化以找到两个组分的最佳比率，以获得最佳的光催化活性。在模拟太阳光照射的光催化氢气中，与单ZNS或ZnIn2S4相比，所有ZnS / Znin2S4杂交光催化剂显示出改善的氢气产生速率，最佳氢气产生率为453.4μmolH（-1）g（-1）通过ZnS / ZIS-20获得，其值大约比单个Znin2S4高的4倍。测量ZnS / Znin2S4杂化光催化剂的电化学性质以探讨界面处的电荷转移模式，并提出了带结构和增强的光催化氢气产生机制。氢生产的优异回收性能表明了这种ZIF衍生金属硫化物在光催化反应中的前瞻性应用。

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    Song Huihui; Wang Na; Meng Hao; Han Yide; Wu Junbiao; Xu Junli; Xu Yan; Zhang Xia; Sun Ting;

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    Northeastern Univ Coll Sci Dept Chem Shenyang 110819 Peoples R China;

    Northeastern Univ Coll Sci Dept Chem Shenyang 110819 Peoples R China;

    Northeastern Univ Coll Sci Dept Chem Shenyang 110819 Peoples R China;

    Northeastern Univ Coll Sci Dept Chem Shenyang 110819 Peoples R China;

    Northeastern Univ Coll Sci Dept Chem Shenyang 110819 Peoples R China;

    Northeastern Univ Coll Sci Dept Chem Shenyang 110819 Peoples R China;

    Northeastern Univ Coll Sci Dept Chem Shenyang 110819 Peoples R China;

    Northeastern Univ Coll Sci Dept Chem Shenyang 110819 Peoples R China;

    Northeastern Univ Coll Sci Dept Chem Shenyang 110819 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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