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首页> 外文期刊>Applied Surface Science >Enhanced photocatalytic performance of RGO/Ag nanocomposites produced via a facile microwave irradiation for the degradation of Rhodamine B in aqueous solution
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Enhanced photocatalytic performance of RGO/Ag nanocomposites produced via a facile microwave irradiation for the degradation of Rhodamine B in aqueous solution

机译：微波辐射对RGO / Ag纳米复合材料光催化降解罗丹明B的作用增强

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摘要

A series of RGO/Ag nanocomposites with different weight addition ratios of graphene oxide (GO) have been successfully prepared in situ through the simultaneous reduction of GO and AgNO3 via a facile microwave irradiation. X-ray diffraction analysis, Fourier Transform Infrared Spectroscopy, UV-vis diffuse reflectance spectra, Scanning electron microscopy, Photoluminescence spectra, Raman spectra, Atomic Force Microscopy, X-ray photoelectron spectroscopy (XPS) and Transmission electron microscopy are employed to determine the properties of the samples. It is found that RGO/Ag nanocomposites with a proper weight addition ratios of GO exhibit higher photocatalytic activity toward liquid phase photodegradation of Rhodamine B under visible light irradiation. The improved photoactivity of RGO/Ag nanocomposites can be ascribed to the integrative synergestic effect of enhanced adsorption capacity, the prolonged lifetime of photogenerated electron-hole pairs and effective interfacial hybridization between RGO and Ag nanoparticles. This study also shows that graphene sheets act as electronic conductive channels to efficiently separate charge carriers from Ag nanoparticles. (C) 2018 Elsevier B.V. All rights reserved.
机译：通过简便的微波辐射同时还原GO和AgNO3，已经成功地原位制备了一系列具有不同重量比的氧化石墨烯（GO）的RGO / Ag纳米复合材料。使用X射线衍射分析，傅立叶变换红外光谱，UV可见漫反射光谱，扫描电子显微镜，光致发光光谱，拉曼光谱，原子力显微镜，X射线光电子能谱（XPS）和透射电子显微镜来确定性能的样本。发现具有适当重量比的GO的RGO / Ag纳米复合材料在可见光照射下对罗丹明B的液相光降解表现出更高的光催化活性。 RGO / Ag纳米复合材料光活性的提高可归因于增强的吸附能力，延长的光生电子-空穴对寿命以及RGO与Ag纳米颗粒之间有效的界面杂交的综合协同效应。这项研究还表明，石墨烯片充当电子传导通道，可以有效地从Ag纳米颗粒中分离出载流子。 （C）2018 Elsevier B.V.保留所有权利。

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