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Synthesis, optical properties, and photochemical activity of zinc-indium-sulfide nanoplates

机译：锌 - 铟 - 硫化物纳米层的合成，光学性质和光化学活性

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摘要

Zinc indium sulfide is an interesting material for photocatalytical applications. Here, ZnxIn2S3+x nanoplates with varying value of x (between 0 and 1) were synthesized by means of colloidal chemistry. The nanoplates have a diameter of up to 100 nm and a relatively small thickness of 2.5 nm. The structure of the Zn-free particles could be assigned to b-In2S3 based on the powder X-ray diffraction and Raman spectroscopy data. Particles containing Zn exhibit the hexagonal ZnIn2S4 structure. The samples were studied by steady state and time resolved photoluminescence spectroscopy. Our results demonstrate that increasing amounts of Zn incorporation result in more intra-gap states that participate in radiative subband gap recombination and simultaneously decrease non-radiative defect states that might, for example, originate from vacancies in the structure. Furthermore, the nanoplates exhibit significantly increased photochemical activity in the degradation of rhodamine 6G, depending on their Zn content. The high surface-to-volume ratio and the intra-gap states might be responsible for this finding.
机译：硫化锌是光催化应用的有趣材料。这里，通过胶体化学合成具有不同值X（介于0和1之间）的Znxin2S3 + X纳米板。纳米板的直径可达100nm，厚度为2.5nm。可以基于粉末X射线衍射和拉曼光谱数据将XN的颗粒的结构分配给B-In2S3。含有Zn的颗粒表现出六边形Znin2S4结构。通过稳态和时间分辨的光致发光光谱研究样品。我们的结果表明，增加了数量的Zn掺入的结果，其参与辐射子带间隙重组的更多间隙状态，同时降低可能的非辐射缺陷状态，这可能是例如结构中的空位。此外，根据其Zn含量，纳米板在罗丹明6g降解中显着提高了光化学活性。高度体积比和间隙内的状态可能负责此发现。

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  • 来源
    《RSC Advances》 |2015年第109期|共9页
  • 作者

    Bjorn Kempken; Volodymyr Dzhagan; Dietrich R. T. Zahn;

  • 作者单位

    Energy and Semiconductor Research Laboratory Department of Physics Carl von Ossietzky University of Oldenburg 26111 Oldenburg Germany.;

    Semiconductor Physics Technische Universitat Chemnitz Reichenhainer Strabe 70 09107 Chemnitz Germany;

    Semiconductor Physics Technische Universitat Chemnitz Reichenhainer Strabe 70 09107 Chemnitz Germany;

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  • 正文语种 eng
  • 中图分类 化学;
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