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以硝酸银、鳞片石墨为原料,在强碱环境下,制备得到石墨烯/银纳米复合材料,采用X射线衍射、红外吸收光谱、透射电子显微镜、紫外可见分光光度计对所制备的石墨烯/银纳米复合材料进行了表征.结果表明:氧化石墨烯和银离子在强碱NaOH的作用下,氧化石墨烯失去部分含氧官能团,被部分还原为石墨烯(rGO),银离子被还原为纳米银颗粒,均匀分布在氧化石墨烯片层表面,颗粒大小和分布受硝酸银用量、反应温度、NaOH的加入顺序及前驱物混合方式等因素影响,在GO与Ag粒子质量比为1:1.08时,负载在石墨烯片层上的银纳米颗粒集中在12nm左右.
Using silver nitrate and flake graphite as raw materials, graphene / silver nanocomposites were prepared under strong alkaline conditions. The prepared graphene / silver nanocomposites were characterized by X-ray diffraction, infrared absorption spectroscopy, transmission electron microscopy and UV-visible spectrophotometer. Silver nanocomposites were characterized.The results show that graphene oxide and silver ions lose part of oxygen-containing functional groups under the action of strong alkali NaOH and are partially reduced to rGO and silver ions are reduced to nanometer Silver particles uniformly distributed on the surface of the graphene oxide film. The particle size and distribution are affected by the amount of silver nitrate, the reaction temperature, the order of addition of NaOH and the mixing mode of the precursor. When the mass ratio of GO to Ag is 1: 1.08 , The silver nanoparticles supported on the graphene sheet are concentrated at about 12 nm.