自由基反应诱导的溴功能化还原氧化石墨烯的制备

以氧化石墨烯(GO)为原料,N-溴代丁二酰亚胺(NBS)为溴代试剂,硫代硫酸钠为还原剂,通过羧基化、溴化和还原三步法,采用自由基反应的方式制备了溴功能化还原氧化石墨烯(rGOBr).通过X射线衍射、扫描电子显微镜、红外光谱、拉曼光谱以及X射线光电子能谱等手段对rGOBr的结构、微观形貌和元素组成进行了表征.结果表明,溴元素以共价键的形式分布在石墨烯表面.本方法原料来源广泛、操作简单且条件温和,为石墨烯的溴功能化提供了一条新途径.

Preparation of Bromo-functionalized Reduced Graphene Oxide by Radical Reaction

Bromo-functionalized reduced graphene oxide(rGOBr)which is a new derivative functionalization of graphene was prepared from graphene oxide(GO) by free radical reaction in three steps, NBS as the brominating agents and sodium thiosulfate as the reducing agent.The structure and surface morphology were investigated via X-ray diffraction(XRD), scanning electron microscopy(SEM), infrared spectrum(IR), Raman spectroscopy and X-ray photoelectron spectroscopy(XPS).The results showed that the bromine atoms were distributed uniformly on the surface of rGOBr sheets with covalent bond.This method asked for easily available raw materials, mild reaction conditions as well as simple operation, which provided enlightening insights into the chemical modification and prearation of bromo-functionalized graphene, as well as promotes more research enthusiasm and interest into bromo-functionalized graphene and other graphene materials.