Photocatalytic Synthesis of Oxidized Graphite Enabled by Grey TiO ₂ and Direct Formation of a Visible‐Light‐Active Titania/Graphene Oxide Nanocomposite

Herein we report a one-step, low cost, photocatalytic method for the synthesis of graphene oxide (GO) from commercial graphite using grey TiO2 as photocatalyst. GO formation is achieved by UV-illumination slurry well-dispersed and graphite. Light-induced valence-band holes then lead to an oxidation exfoliation graphite, resulting in visible-light-active GO. An optimal level can be established controlling UV illumination time. Moreover, GO-decorated directly active photocatalyst that can, example, used pollution degradation.