Reduced graphene oxide@TiO2 nanorod@reduced graphene oxide hybrid nanostructures for photoelectrochemical hydrogen production

摘要

The optimised geometrical configuration between TiO2 nanorods (NRs) arrays and reduced graphene oxide (RGO) is essential for their application in catalysis of photoelectrochemical hydrogen production system. The scrupulous design of hierarchical nanoarchitectures by integration of multiple active materials can reinforce the light harvesting efficiency, enhance photocarrier generation and provide fast electron transport and efficient charge collection. Graphene film formed on the top surface and at the bottom of titanium dioxide nanorod (TiO2 NRs) arrays were scrupulously fabricated in this paper. More importantly, the hydrogen production rate of RGO@TiO2NR@RGO hybrid nanostructures was up to 800 μmol/h-1m2 (radiation intensity: 160 mW/cm2) which is over 2.5 times compared with bare TiO2NR.