Kang Wenze, Li Shangyi
Institute of Mining Engineering, Heilongjiang University of Science and Technology Harbin 150022 China
RSC Adv. 2018 Jun 27;8(41):23459-23467. doi: 10.1039/c8ra03451f. eCollection 2018 Jun 21.
In this paper, fluorinated graphene was prepared from graphite fluoride by an improved Hummers method. The fluorinated graphene was characterized using an X-ray diffractometer (XRD), transmission electron microscope (TEM), atomic force microscope (AFM) and X-ray photoelectron spectrometer (XPS). Moreover, a gas sensitivity test was carried out. The results show that the fluorinated graphene is composed of about 5 layers prepared by utilising the improved Hummers method. The content of fluorine in fluorinated graphene decreased, mainly due to the fracture of C-F bonds. Fluorinated graphene showed gas sensitivity to ethanol, ammonia, methane and formaldehyde gases. The sensitivity of fluorinated graphene to ammonia is the highest and is 3.5 times the sensitivity of graphene to ammonia. The doping of fluorine atoms was conducive to improving the gas sensitivity of fluorinated graphene.
本文采用改进的Hummers法由氟化石墨制备了氟化石墨烯。利用X射线衍射仪（XRD）、透射电子显微镜（TEM）、原子力显微镜（AFM）和X射线光电子能谱仪（XPS）对氟化石墨烯进行了表征。此外，还进行了气敏测试。结果表明，采用改进的Hummers法制备的氟化石墨烯由约5层组成。氟化石墨烯中氟含量降低，主要是由于C-F键断裂。氟化石墨烯对乙醇、氨、甲烷和甲醛气体表现出气敏性。氟化石墨烯对氨的灵敏度最高，是石墨烯对氨灵敏度的3.5倍。氟原子的掺杂有利于提高氟化石墨烯的气敏性。
