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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis of the MoS2@CuO heterogeneous structure with improved photocatalysis performance and H2O adsorption analysis
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Synthesis of the MoS2@CuO heterogeneous structure with improved photocatalysis performance and H2O adsorption analysis

机译：具有改善的光催化性能和H2O吸附分析的MoS2 @ CuO异质结构的合成

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MoS2@CuO heterogeneous structure nanoflowers were synthesized through a two-step hydrothermal method for the first time. The valence band offset (VBO) and conduction band offset (CBO) of the MoS2@CuO heterojunction, and the bases for the design of the heterogeneous structure were determined by X-ray photoemission spectroscopy (XPS). For the increased specific surface area and the formation of staggered type-II band alignment of the composite structure, a significantly enhanced photocatalytic ability of the MoS2@CuO heterojunction was obtained by studying the photodegradation of methylene blue (MB). After irradiation for 100 min, the residual MB in solution was about 27.5% for pristine MoS2 nanoflowers while it was 4.3% for MoS2@CuO hetero-nanoflowers, respectively. The humidity sensing properties of the two nanostructures were also studied for comparison. The results showed that better response/recover times were obtained. In order to give a theoretical explanation for this phenomenon, we performed first-principles calculation to analyse the corresponding humidity sensing mechanisms of MoS2 and MoS2@CuO in detail. The calculated results showed that water molecules could bind stronger to the CuO surface compared to MoS2, which is in line with the experimental observations.
机译：首次通过两步水热法合成了MoS2 @ CuO异质结构纳米花。通过X射线光电子能谱（XPS）确定了MoS2 @ CuO异质结的价带偏移（VBO）和导带偏移（CBO）以及异质结构设计的依据。为了增加复合材料的比表面积并形成交错的II型能带排列，通过研究亚甲基蓝（MB）的光降解作用，可显着提高MoS2 @ CuO异质结的光催化能力。辐照100分钟后，原始MoS2纳米花在溶液中的残留MB约为27.5％，而MoS2 @ CuO杂纳米花则为4.3％。为了比较，还研究了两个纳米结构的湿度感测特性。结果表明获得了更好的响应/恢复时间。为了对该现象提供理论上的解释，我们进行了第一性原理计算，详细分析了MoS2和MoS2 @ CuO的相应湿度感应机理。计算结果表明，与MoS2相比，水分子可以更牢固地与CuO表面结合，这与实验观察一致。

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