▎ 摘　　要

This study is a development method of exfoliation and preliminary reduction of graphite oxide (GO) by polyethylene glycol (PEG). The results of modified GO (MGOPEG) had not shown the crystalline peak d(002) on X-ray diffraction patterns and took the form of a single layer graphene oxide on the images of atomic force microscopy. Also, MGOPEG had a higher heat resistance than GO because of preliminary reduction. Finally, the exfoliated GO (graphene oxide) was reduced to graphene by the reducing agent system of hydrogen iodide in acetic acid to form graphene (RGO(HI-AcOH)). The results showed the disappearing of exothermic peak on the Differential Scanning Calorimetry curve of RGO(HI-AcOH) and graphite while a wide exothermic peak was found around 245 degrees C with Delta H = -1505.86 J/g and 198 degrees C with Delta H = -482.09 J/g of GO and MGOPEG respectively. The same results were shown with thermogravimetric analysis. In addition, Fourier transform infrared, ultraviolet-visible, and Raman spectra showed more clearly the characteristics of GO, MGOPEG, and RGO(HI-AcOH). The sheet resistance of RGO(HI-AcOH) is about 120 Omega/square(with 1.66 x 10(3) S m(-1) of conductivity) in the thin film formed on cellulose acetate substrate.