抗坏血酸与茶多酚协同作用制备单层石墨烯

Preparation of Monolayer Graphene via Synergistic Action of Ascorbic Acid and Tea Polyphenols

采用改良的Hummers法制备氧化石墨烯(GO),再用抗坏血酸(LAA)、茶多酚(TP)和LAA/TP双组分还原体系作为还原剂,将氧化石墨烯还原成石墨烯(RGO),分别进行导电性能测试、拉曼光谱分析、X射线衍射分析以及X射线光电子能谱分析,并利用扫描电镜、透射电镜以及原子力显微镜对LAA/TP双组分还原体系所制备的RGO的形貌进行了表征.结果表明,LAA/TP双组分还原体系之间存在协同作用,其对GO的还原效果优于单组分还原剂,所制备的RGO呈单层结构.文中还对LAA/TP体系的协同作用机理进行了阐释.

Oxidized graphene oxide（ GO） was prepared by means of the modified Hummers method,and it was reduced to graphene（ RGO） respectively by using ascorbic acid（ LAA）,tea polyphenols（ TP） and the LAA/TP two-component reduction system as a reductant. Then,the conductivity,Raman spectroscopy,X-ray diffraction pattern and X-ray photoelectron spectroscopy of the obtained RGO were determined,and the morphology of the RGO prepared by LAA/TP was also characterized by means of the scanning electron microscopy,the transmission electron microscopy and the atomic force microscopy. The results show that there exists a synergistic effect between the two-component reduction system of LAA/TP,and the reduction effect of the system is better than that with only single component,and that the obtained RGO is of a monolayer structure. In addition,the mechanism of the synergistic effect between LAA and TP was also explained.