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Size-controlled hydrothermal synthesis of SnS2 nanoparticles with high performance in visible light-driven photocatalytic degradation of aqueous methyl orange

机译:尺寸控制的水热合成SnS2纳米粒子在可见光驱动的甲基橙水溶液的光催化降解中具有高性能

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摘要

A simple hydrothermal method was developed for the size-controlled synthesis of SnS2 nanoparticles, using common and inexpensive SnCl4-5H2O and thioacetamide as the reactants and 5 vol.% acetic acid aqueous solution as the solvent. The structure, composition and optical property of the obtained products were characterized by X-ray diffraction, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, Brumauer-Emmett-Teller (BET) surface area analysis and UV-vis diffuse reflectance spectra, and their possible formation mechanism was proposed. Besides, their photocatalytic properties were tested by degrading methyl orange in distilled water (20 mg/l) under visible light (λ > 420 nm) irradiation. It was found that SnS2 nanoparticles synthesized under the appropriate hydrothermal conditions not only exhibited high visible light-driven photocatalytic activity, but also had good photocatalytic stability.
机译:开发了一种简单的水热方法,用于以尺寸控制的方式合成SnS2纳米粒子,使用常见且价格便宜的SnCl4-5H2O和硫代乙酰胺作为反应物,并使用5体积%的乙酸水溶液作为溶剂。通过X射线衍射,透射电子显微镜,能量色散X射线光谱,X射线光电子能谱,Brumauer-Emmett-Teller(BET)表面积分析和UV-UV表征了所得产物的结构,组成和光学性质。漫反射光谱,并提出了可能的形成机理。此外,通过在可见光(λ> 420 nm)照射下在蒸馏水(20 mg / l)中降解甲基橙来测试其光催化性能。发现在适当的水热条件下合成的SnS2纳米粒子不仅表现出高可见光驱动的光催化活性,而且具有良好的光催化稳定性。

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