改进的Hummers法制备氧化石墨烯的综合实验设计

Comprehensive Experimental Design on Synthesis of Graphene Oxide by Modified Hummers’ Method

该文采用Hummers法处理石墨粉制备氧化石墨烯,材料的宏观和微观形貌发生明显的变化,从而推断材料的组成和结构在处理过程中发生了明显的改变。分别利用扫描电镜、X-ray衍射光谱(XRD)、拉曼光谱和X-ray电子能谱证实了上述推论。该文探索将成熟的氧化石墨烯制备方法结合纳米材料的形貌、结构和组成表征技术作为一门综合实验引入本科生实验课程。通过对比石墨粉与氧化石墨烯的宏观结构、微观结构和组成的差别,使学生认识到材料合成条件控制的重要性以及纳米材料维度差异。借助综合实验平台将成熟的科研成果转化为实验教学内容,可开拓学生的科研视野、思路,掌握新的测试技术,同时有效地培养学生的科研能力、分析和解决问题的能力,为今后的工作或继续深造打下基础。

In this paper,the preparation of grapheme oxide by graphite powder by Hummers method,the macroscopic and microscopic morphology of the material changed significantly,and it was concluded that the composition and structure of the material changed obviously during the processing.The above inferences were confirmed by scanning electron microscopy(SEM),X-ray diffraction spectroscopy(XRD),Raman spectroscopy and X-ray pohoto electron spectroscopy(XPS).An exploration was done on transferring scientific research projects to undergraduate comprehensive experimental teaching,which included the preparation and characterizations(e.g.morphology,structure and composition)of graphene oxide.By comparing the macrostructure,microstructure and compositional differences between graphite powder and graphene oxide,students are made aware of the important of material synthesis conditions and differences in nanomaterial dimensions.Using the comprehensive experimental platform to transform mature scientific research results into experimental teaching content,we can open up students’ scientific research horizons,ideas,master new testing techniques,and effectively cultivate students’ scientific research ability,analytical problems,and problem solving.To lay the foundation for future work or study.