纳米银-石墨烯复合材料的制备及可见光光催化性能  

Preparation and Visible Light Photocatalytic Properties of Ag-RGO Composite

作　　者：许若鹏[1] 石磊[1] 黄浪欢[1] 王亚玲[1] 谭绍早[1] 

机构地区：[1]暨南大学,广东广州510632

出　　处：《稀有金属材料与工程》2017年第6期1694-1698,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51172099;21476052;21271087)

摘　　要：以聚乙烯吡咯烷酮(PVP)为还原剂及稳定剂,在温控条件(7)(21)(15)℃(8)下制备了纳米银-石墨烯(7)(32)g-RGO(8)复合材料。采用X射线粉末衍射、透射电镜、紫外-可见吸收光谱、拉曼光谱、光电子能谱、红外光谱等对该复合材料的结构及形貌进行了表征。结果表明,RGO表面所负载的纳米(32)g粒子尺寸小,分散性好,与RGO结合牢固。以酸性橙(22)(7)(32)(46)(22)(8)为目标污染物,进行了可见光光催化活性测试。结果显示,样品(15)(13)(17)(32)g-RGO可在(16)(17)(15)min内将(32)(46)(22)降解完全。活性物种捕获实验揭示(32)g-RGO对(32)(46)(22)的高效降解源自(32)g纳米粒子的表面等离子共振及RGO快速传导电子的协同效应。Ag-graphene composites（Ag-RGO） were prepared using poly（N-vinyl-2-pyrrolidone）（PVP） as reductant and stabilizer under 60 °C reaction conditions.The synthesized Ag-RGO were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM）,UV-vis absorption spectra,X-ray photoelectron spectroscopy（XPS）,and Fourier transform infrared spectroscopy（FT-IR）.The results show that Ag nanoparticles with small-size and excellent dispersion are anchored firmly on RGO sheet.The photocatalytic activity was evaluated by oxidation of AO7 under visible light irradiation.AO7 could be almost degraded completely within 120 min by 0.2Ag-RGO sample.The origin of high photocatalytic activity of Ag-RGO was discussed;it is mainly ascribed to the surface plasma resonance effect of Ag nanoparticles in Ag-RGO composites.In addition,RGO acts as electron transmission channels.The synergistic effects induced by RGO also contribute to the high photocatalytic activity.

关 键 词：光催化 石墨烯 纳米银 可见光 表面等离子共振 

分 类 号：O643.36[理学—物理化学] TB33[理学—化学]