Hierarchical composites of TiO 2 nanowire arrays on reduced graphene oxide nanosheets with enhanced photocatalytic hydrogen evolution performance

Reduced graphene oxide (RGO)–TiO 2 nanowire array hierarchical composites were prepared via an in situ controlled growth process and subsequent calcination, and showed much higher H 2 production activity than that of pure TiO 2 and RGO–TiO 2 generated by mechanical mixing.