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用水热法制备了ZnIn2S4固溶体,并通过XRD和UV-vis漫反射光谱进行了表征.研究了一甲胺、二甲胺和三甲胺为给电子体,在Pt/ZnIn2S4上的可见光光催化制氢及自身的降解反应.3种甲胺都能显著提高光催化分解水制氢活性,同时自身得到很好的降解.电子给体的放氢活性顺序为:TMA>>DMA>MMA.通过红外衰减全反射(ATR-IR)法检测电子给体在ZnIn2S4表面的吸附行为,吸附强度大小依次为MMA>DMA>TMA.光催化活性与分子结构和在催化剂表面的吸附行为有关.3种污染物浓度对放氢活性的影响都符合Langmuir-Hinshelwood动力学模型.讨论了可能的化学反应机理.
The ZnIn2S4 solid solutions were prepared by hydrothermal method and characterized by XRD and UV-vis diffuse reflectance spectroscopy. Monomethylamine, dimethylamine and trimethylamine as electron donors were prepared. The visible light photocatalytic hydrogen production on Pt / ZnIn2S4 And their own degradation reaction.All the three kinds of methylamine can significantly improve the photocatalytic decomposition of water to produce hydrogen activity, while its good degradation.Electron donor discharge activity sequence: TMA >> DMA> MMA. By infrared attenuation The total adsorption (ATR-IR) was used to determine the adsorption behavior of electron donors on ZnIn2S4 surface, and the order of adsorption intensity was MMA> DMA> TMA. The photocatalytic activity was related to the molecular structure and the adsorption behavior on the catalyst surface. The effects on the hydrogen evolution activity are in accordance with the Langmuir-Hinshelwood kinetic model, and the possible chemical reaction mechanisms are discussed.