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首页> 外文期刊>Catalysis science & technology >Synergistic effect of PtSe2 and graphene sheets supported by TiO2 as cocatalysts synthesized via microwave techniques for improved photocatalytic activity
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Synergistic effect of PtSe2 and graphene sheets supported by TiO2 as cocatalysts synthesized via microwave techniques for improved photocatalytic activity

机译：由TiO2支持的PTSE2和石墨烯片的协同作用，作为通过微波技术合成的Cococatalysts，以改善光催化活性

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Here we report a new composite material consisting of TiO2 nanoparticles grown in the presence of a layered PtSe2/graphene hybrid as a high-performance photocatalytic material. The heterogeneous PtSe2-graphene/TiO2 nanocomposites were successfully synthesized through a facile and fast microwave-assisted method. The prepared composites were characterized through X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM), Raman spectroscopic analysis, X-ray photoelectron spectroscopy (XPS), and UV-vis absorbance spectra and UV-vis diffuse reflectance spectra (DRS) analyses were obtained. The catalytic behavior was investigated through the decomposition of rhodamine B (Rh. B) as a standard dye and Texbrite MST-L as an industrial dye. This extraordinary photocatalytic activity arises from the positive synergetic effect between the PtSe2 and graphene components in this heterogeneous photocatalyst. In this study the graphene behaves as an electron transfer agent, collector, contributor and a source of active adsorption sites. The optical properties were also observed to be affected by the different weight% of graphene in the composites by observing their respective band gaps from DRS spectra.
机译：在这里，我们报告了一种新的复合材料，该复合材料由TiO2纳米颗粒组成，在存在层次的PTSE2/石墨烯混合体中作为高性能光催化材料而生长。通过轻松且快速的微波辅助方法成功合成了异质的PTSE2-Graphene/TiO2纳米复合材料。通过X射线衍射（XRD），扫描电子显微镜（SEM）表征制备的复合材料，具有能量色散X射线（EDX）光谱，透射电子显微镜（TEM），拉曼光谱分析，X射线光电学光谱（XPS）（XPS）（XPS）获得了UV-VIS吸光度光谱和UV-VIS弥散反射光谱（DRS）分析。通过将若丹明B（rh。b）分解为标准染料和Texbrite MST-L作为工业染料，研究了催化行为。这种非凡的光催化活性来自该异质光催化剂中PTSE2和石墨烯成分之间的正共同作用。在这项研究中，石墨烯是电子传递剂，收集器，贡献者和活性吸附位点的来源。还观察到复合材料中不同重量％的石墨烯的影响，通过观察DRS光谱的各自的带隙。

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