Preparation of heterostructured mesoporous In2O3/Ta2O5 nanocomposites with enhanced photocatalytic activity for hydrogen evolution

► Mesoprous In2O3/Ta2O5 with heterostructure was synthesized using a sol-gel method. ► Thermal stability and optical absorption property of mesoporous Ta2O5 are improved. ► The nanophotocatalyst exhibits an enhanced photocatalytic activity and stability for H2 evolution.