静电自组装法制备Ag＠AgCl/GO复合薄膜及其SERS性能研究∗

摘要

采用水热法制备Ag＠AgCl溶胶，并采用静电自组装技术在石英基片上通过交替提拉氧化石墨烯(GO)和Ag＠AgCl溶胶，制备Ag＠AgCl/GO 复合薄膜并用做表面增强拉曼光谱基底。采用 SEM、XRD、EDS、UV-Vis以及共聚焦激光拉曼光谱测试仪对复合薄膜的结构及性能进行表征。结果表明，通过静电自组装法可以获得结构稳定，性能优异的薄膜。Ag＠AgCl/GO 复合薄膜除了对罗丹明6G 具有优异的表面增强拉曼散射性能外(拉曼增强因子可达107数量级)，由于 AgCl 的引入使体系具有优异的光催化降解性能，可以实现 Ag＠AgCl/GO 表面增强拉曼光谱基底的循环利用。%In this study,Ag@AgCl nanocomposite colloidal solution was obtained via hydrothermal method,fol-lowed by dip-coating with GO solution via electrostatic self-assembly to obtain Ag@AgCl/GO nanocomposite films,which can be used as surface enhanced Raman scattering (SERS)substrates.The films are studied by means of SEM,XRD,EDS,UV-Vis,and laser confocal Raman spectrometer.Results showed that the obtained films are surface uniform.Ag@AgCl/GO nanocomposite films have the optimized SERS activity on adsorbed rhodamine 6G (R6G)molecules with the maximum enhancement factor value of 1.08×107 .Furthermore,as the introduction of AgCl,the system has high efficient and stable photocatalytic activity under visible light,which leads to the recycling of the obtained Ag@AgCl/GO SERS substrates.