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以Ca Cl2作为催化剂、Na BH4为还原剂,还原氧化石墨烯。还原反应能在室温下进行,并以去离子水作为唯一的溶剂,此法是一种低能耗、环保并简易的方法。通过红外光谱、紫外光谱、X射线光电子能谱、表面电阻测量手段研究Ca Cl2添加量对氧化石墨烯还原程度的影响。采用透射电子显微镜和原子力显微镜观察氧化石墨烯和还原氧化石墨烯的形貌。结果表明,以氯化钙作为催化剂还原氧化石墨烯,能更有效地去除氧化石墨烯表面的含氧官能团,提高还原氧化石墨烯的导电性。当Ca Cl2添加浓度达到50 mmol/L时,还原氧化石墨烯C/O比达到5.38,表面电阻达到18.6 kΩ/sq。
Using CaCl 2 as a catalyst and Na BH 4 as a reducing agent, graphene oxide is reduced. The reduction can be carried out at room temperature with deionized water as the sole solvent. This method is a low energy, environmentally friendly and easy method. The effect of CaCl2 addition on the reduction of graphene oxide was studied by means of infrared spectroscopy, ultraviolet spectrum, X-ray photoelectron spectroscopy and surface resistance measurement. Transmission electron microscopy and atomic force microscopy were used to observe the morphology of graphene oxide and reduced graphene oxide. The results showed that the reduction of graphene oxide with calcium chloride as a catalyst could remove the oxygen-containing functional groups on the surface of graphene oxide and improve the conductivity of the graphene oxide. When the Ca Cl2 concentration reached 50 mmol / L, the graphene oxide C / O ratio reached 5.38 and the surface resistance reached 18.6 kΩ / sq.