基于固/气反应的氧化石墨烯水热还原研究  

Hydrothermal Reduction of Graphene Oxide via Solid/Gas Reaction

作　　者：梁先庆[1] 梁水英 韩滔韬 陈用标 郭进[1] 

机构地区：[1]广西大学物理科学与工程技术学院,广西南宁530004

出　　处：《广西科学》2014年第3期215-219,共5页Guangxi Sciences

基　　金：国家自然科学基金项目(11105032);广西高等教育教学改革工程项目(2013JGZ100);广西大学实验室建设与实验教学改革项目(20120401)资助

摘　　要：【目的】对氧化石墨烯的水热还原过程进行系统研究。【方法】采用改进的水热装置,以乙醇为还原剂,通过固/气反应成功实现了水热条件下氧化石墨烯的还原,制备得到石墨烯。通过透射电子显微镜(TEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)、X射线近边吸收谱(XANES)和热重分析(TGA)对石墨烯材料的结构和性质进行了测试,探讨水热条件下乙醇蒸汽对氧化石墨烯的还原效果。【结果】研究结果表明,水热环境下的固/气反应还原能够有效地去除氧化石墨烯上的含氧基团,石墨烯的π网格结构得到很好的恢复。还原后的石墨烯材料比氧化石墨烯具有更为优异的热稳定性。【结论】该方法低成本、高效、环保,可用于石墨烯的大规模制备。[Objective]A systemic investigation was performed to study the reduction process of graphene oxide by hydrothermal method.[Methods]The reduced graphene oxide （RGO）was facilely prepared via a solid/gas reaction of graphene oxide （GO）and ethanol vapor in a self-de-signed hydrothermal system.Ethanol was introduced into the hydrothermal system to improve the reduction.The structure and property of graphene materials were characterized by trans-mission electron microscope （TEM）,X-ray diffraction analysis （XRD）,X-ray photoelectron spectroscopy （XPS）,X-ray absorption near edge structure （XANES）spectroscopy and thermo-gravimetric analysis （TGA）.[Results]The oxygen functional groups were effectively removed by the solid/gas interfacial reduction in a hydrothermal process,and theπ-conj ugated frame-work of graphene was effectively recovered.The TGA results show that the thermal stability of RGO is much better than that of GO.[Conclusion]This method offers a low-cost,effective and eco-friendly route for large-scale production of grapheme.

关 键 词：氧化石墨烯 水热还原 固 气反应 

分 类 号：TQ127.1[化学工程—无机化工]