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本文采用液相化学法对氧化石墨烯氧化官能团的分布进行控制合成,使较多含氧官能团在氧化石墨烯的边缘区域.X射线光电子能谱显示其具有高的含氧官能度,且C=O/C–O比值在2左右,远高于原有Hummers方法制备的氧化石墨烯的0.17.其深黑色的外观与其他文献对比,可以证明其主要的含氧官能团为羧基且羰基主要存在于边缘区域.具有该结构的氧化石墨烯可以经过简单还原后,极大地恢复其高导电性,层面上存有的少量官能团可以用来有效地抓住催化剂颗粒,使得由这种氧化石墨烯所制得的Co O复合物具有非常优秀的催化氧气还原反应性能.
In this paper, the liquid-phase chemistry was used to control the distribution of oxidation graphene oxide functional groups to make more oxygen-containing functional groups in the edge region of graphene oxide.X-ray photoelectron spectroscopy showed that it has high oxygen functionalities and C = O / C-O ratio of about 2, much higher than the original Hummers prepared graphene oxide 0.17. Its dark black appearance compared with other literature, it can be proved that the main oxygen-containing functional group is a carboxyl group and the carbonyl is mainly present in The graphene oxide having this structure can recover its high conductivity greatly after simple reduction and the small amount of functional groups present on the layer can be used to effectively grasp the catalyst particles so that the graphene oxide The obtained Co O complex has very good catalytic oxygen reduction reaction performance.