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采用Hummers法合成氧化石墨烯,并以维生素C作为还原剂制备还原氧化石墨烯。在氧化石墨烯的还原过程中,使用Design-Expert软件,采用响应面优化法综合分析反应时间、反应温度、反应物配比(维生素C与氧化石墨烯的质量比)对还原氧化石墨烯导电性的影响,并建立了还原氧化石墨烯电导率的预测模型。回归模型和响应面分析结果表明,氧化石墨烯的最优还原工艺参数为:反应时间为2h、反应温度为95℃、反应物配比为13。验证试验所制备的还原氧化石墨烯(rGOm)的电导率为10.326s/cm,与理论预测值的拟合度较高,说明电导率的预测模型合理、有效。所得产物的拉曼光谱、X射线衍射、紫外可见吸收光谱分析结果表明,试验制得还原氧化石墨烯质量较高。
The graphene oxide was synthesized by the Hummers method and the reduced graphene oxide was prepared by using vitamin C as the reducing agent. In the process of reduction of graphene oxide, using Design-Expert software, response surface optimization method was used to analyze the reaction time, reaction temperature and reactant ratio (mass ratio of vitamin C and graphene oxide) to the reduction of graphene oxide The model of predicting the conductivity of reduced graphene oxide was established. Regression model and response surface analysis showed that the optimal reduction parameters of graphene oxide were as follows: the reaction time was 2h, the reaction temperature was 95 ℃ and the ratio of reactants was 13. The conductivity of the prepared reduced graphene oxide (rGOm) was 10.326s / cm, which was in good agreement with the theoretical predictions, indicating that the conductivity model is reasonable and effective. The results of Raman spectroscopy, X-ray diffraction and UV-Vis absorption spectroscopy showed that the quality of graphene oxide reduced.