氧化石墨烯的制备和表征

Preparation and characterization of graphene oxide

论述了用改进的Hummers法合成了氧化石墨烯。通过改变不同阶段的合成条件,分别合成氧化石墨烯,并通过红外光谱、紫外光谱对氧化石墨烯的结构和谱学特性进行表征。结果表明:氧化石墨烯表面接有-OH、C-O-C、C=O和-COOH官能团,制备得到纳米级的氧化石墨烯,且含氧官能团的量随氧化程度的升高而增多;增大氧化时间,用粉末石墨来制备氧化石墨烯可以得到氧化程度高的产物。

Diffferent graphite oxides （GO） were prepared by improved Hummers method and changing the different stages of the synthesis conditions. The structures and properties of GO were characterized by FT-IR, UV-vis. The results showed that the surface of the graphene oxide is connected with-OH, C-O-C, C=O and -COOH, etc. The products are nano-scale. The content of oxygen-containing groups in as-obtained products obviously increases with increasing the degree of oxidation. The higher degree of oxidation was made by increasing oxida- tion time or the graphite powders which replaced the flake graphite.