水热法制备氟化石墨烯

摘要

以石墨为原料,由Hummers法的改进方法制备氧化石墨烯,再采用水热法对氧化石墨烯进行氟化,获得氟化石墨烯。利用X射线衍射（XRD）、傅立叶红外光谱（FTIR）、拉曼光谱（Raman）、原子力显微镜（AFM）对其结构和微观形貌进行表征。FTIR和Raman结果表明氟化产物的化学结构中存在C-F键,且D峰（1350 cm-1处）和G峰（1580 cm-1处）所对应的强度比ID/IG在氟化后明显变大,即氟化造成碳结构缺陷,规整性下降。AFM显示氟化石墨烯具有纳米层状结构,厚度约为4 nm。该法成本较低,工艺简单,易于控制,对设备要求不高,有望实现氟化石墨烯的大规模制备。%We have devised a hydrothermal method to fluorinate graphene oxide,which is prepared by Hummers’ modified method with graphite as raw material.The as-obtained sample was characterized by X-ray diffraction(XRD),Fourier transform infrared(FTIR) spectroscopy,Laser Raman(Raman) spectroscopy and Atomic force microscope(AFM).FTIR result shows the present of C-F bond.Obviously,the fluorination lead to increase of the intensity ratio of D peak(1 350 cm-1) and G peak(1 580 cm-1),ID/IG,which was evidenced by Raman,prove that the fluorinating process results in the structural flaws and decrease in the regularity of carbon.In addition,AFM shows fluorinated graphene has nano layered structure with a thickness of 4 nm.These results demonstrate that the proposed approach is of lower cost,simple process,easy to control,less requirements on equipment,and is hopeful to realize the large-scale preparation.