中文摘要：

利用改进的Hummer法制备氧化石墨，然后分别采用化学还原法和热还原法将氧化石墨还原制得功能化石墨烯。采用X-射线衍射（XRD）、扫描电镜（SEM）、傅立叶红外（FT-IR）和热重（TG）等表征手段对功能化石墨烯制备过程中的原料石墨、氧化石墨和石墨烯进行了表征。结果表明，化学还原法和热还原法都能还原氧化石墨制得功能化石墨烯，但还原程度不同。与化学还原法相比，热还原法制备的功能化石墨烯含有较少含氧基团，且工艺简单，耗时少，是一种高效制备大量功能化石墨烯的方法。

英文摘要：

Functional graphene was prepared by chemical reduction or thermal reduction of graphite oxide synthe- sized by an improved Hummer＇ s method. The graphite, graphite oxide and functional graphene were characterized by X-ray diffraction（XRD） ,scanning electron microscopy（SEM）, FT-IR and thermogravimetry（TG）. The results showed that the functional graphene can be prepared by chemical reduction method and thermal reduction method, respectively, but with dif- ferent reduction degrees. Compared with the chemical reduction method, the thermal reduction method was a fast and effi- cient way to prepare the functional graphene on a large scale because of its simple process, time saving and lower content of oxygen containing groups.