ABSTRACT
As a superstar nanomaterial, graphene holds great promise for many technological applications and attracts signi cant attentions. However, graphene is a semimetal with zero gap. Oxidation and hydrogenation are the two common ways to convert sp2 hybridization state into sp3 con guration and then open a tunable bandgap in the graphene-based materials. The other physical properties, such as mechanical strength and work function, can be also tailored by the ratio and species of functional groups. Moreover, the existence of surface functional groups will facilitate metal adsorption on the graphene basal plane, resulting in applications in the elds of energy and environmental science. In this chapter, we will summarize recent researches on the structures and physical properties of graphene oxide (GO) and hydrogenated graphene (HG). The relevant experimental progresses will also be brie‰y reviewed.
