银-石墨烯纳米复合材料的制备与表征

Preparation and Characterization of Ag-Graphene Nanocomposite

以绿色无毒的柠檬酸三钠为还原剂,通过水浴加热还原氧化石墨和银氨溶液中的银离子制备银-石墨烯纳米复合材料。利用紫外-可见吸收光谱、傅里叶变换红外光谱、显微拉曼光谱、透射电子显微镜对所制备的样品进行表征。结果表明:氧化石墨和银离子在反应过程中被柠檬酸三钠成功同步还原,银纳米粒子均匀附着在石墨烯片层上,平均尺寸约20nm,用柠檬酸三钠为还原剂制备的银-石墨烯复合材料的拉曼光谱D峰和G峰的强度比值(ID/IG)高达1.67,还原程度高。

Using nontoxic green trisodium citrate as reducer, Ag-graphene nanocomposite has been prepared by water bath heating to reduce graphite oxide and silver-ammonia solution synchronously. UV-Vis spectroscopy, Fourier transform infrared spectroscopy （FTIR）, Raman spectroscope, transmission electronic election microscope （TEM） were used to characterize the prepared sample. The results of characterization indicate that graphite oxide and ammoniacal silver ions are reduced by trisodium citrate simultaneously. The Ag nanoparticles with an average particle size of 20 nm are attached to the surface of graphene sheets. The ID/IG value of the Ag-graphene nanocomposite is up to 1.67. The reduction extent is high.