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Modification of titanium dioxide (TiO 2 ) for H 2  generation is a grand challenge due to its high chemical inertness, large bandgap, narrow light-response range and rapid recombination of electrons and holes. Herein, we report a simple process to prepare nanospherical like reduced graphene oxide (NS-rGO) decorated TiO 2  nanoparticles (NS-rGO/TiO 2 ) as photocatalysts. This modified TiO 2  sample exhibits remarkably significant improvement on visible light absorption, narrow band gap and efficient charge collection and separation. The photocatalytic H 2  production rate of NS-rGO/TiO 2  is high as 13996 μmol g −1  h −1 , which exceeds that obtained on TiO 2  alone and TiO 2  with parallel graphene sheets by 3.45 and 3.05 times, respectively. This improvement is due to the presence of NS-rGO as an electron collector and transporter. The geometry of NS-rGO should be effective in the design of a graphene/TiO 2  composite for photocatalytic applications.

Nanospherical like reduced graphene oxide decorated TiO2 nanoparticles: an advanced catalyst for the hydrogen evolution reaction