Abstract：The graphite oxide (GO) was prepared from natural graphite of different size with the modified Hummers method, and then the graphene was prepared by using hydrazine hydrate to reduce the exfoliated graphite oxide. The chemical structure, spectroscopy and the crystallinity of graphite, graphite oxide and graphene were characterized by using FTIR, Raman and XRD, respectively. The results show that the natural graphite is fully oxidized to graphite oxide, the graphite oxide is reduced to the perfect graphene. The smaller the size of natural graphite is, the greater the degree of oxidation, and the greater the interlayer spacing of graphite oxide are. The ratio of graphene D to G band intensities is proportional to size of graphite; compared with graphite oxide at similar size, the ratio of graphene D to G band intensities is higher than that of graphite oxide, suggesting that the average size of sp2-hybridized carbon layer surface of graphene is smaller than that of graphite oxide, and the new generation graphitization region is separated to smaller sp2-hybridized regions by some defects.
赵天宇, 杨程, 宋洪松. 原料尺寸对氧化石墨与石墨烯性能的影响[J]. 材料工程, 2014, 0(9): 76-82.
ZHAO Tian-yu, YANG Cheng, SONG Hong-song. Effects of Raw Materials Size on Properties of Graphite Oxide and Graphene. Journal of Materials Engineering, 2014, 0(9): 76-82.
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