以氧化石墨烯为氧化介质制备石墨烯/聚苯胺导电复合材料

Preparation of graphene/polyaniline conducting composite by graphene oxide for oxidant

采用超声辅助Hummers法制得厚度约为1nm的氧化石墨烯,以其为氧化介质与苯胺反应合成了石墨烯/聚苯胺(RGO/PANI)导电复合材料。利用AFM、SEM、XRD和FTIR对反应所得产物进行了表征。结果表明:苯胺在略高于室温的酸性水溶液中可以对氧化石墨烯(GO)进行还原,而苯胺自身则被氧化石墨烯中大量的含氧基团氧化并发生聚合反应,最终生成RGO/PANI导电复合材料,当苯胺用量为1mL,氧化石墨烯用量为0.1g,在水浴温度为70℃下剧烈搅拌24h时,获得的RGO/PANI复合材料导电性最佳,约为10S/cm。

Graphene/polyaniline（RGO/PANI） conducting composites were synthesized using graphene oxide with 1 nm thickness, synthesized by ultrasound-assisted Hummers method, as the oxidant. AFM, SEM, FTIR and XRD were employed to characterize RGO/PANI composites. The results show that graphene oxide（GO） nanosheets can be readily reduced by aniline in an aqueous acid medium at the temperatures just above room temperature, while simultaneously aniline undergoes an oxidative polymerization by oxidability of oxygen functional groups on GO to produce RGO/PANI conducting composites. When the amounts of GO and aniline in the reaction are 0.1 g and 1 mL respectively, the best conductivity of the prepared RGO/PANI composites is 10 S/cm.