Unprecedented photocatalytic activity of carbon coated/MoO3 core–shell nanoheterostructurs under visible light irradiation

We reveal that nano-scale carbon layer deposited by hydrothermal process on molybdenum oxide (MoO 3 ) nanowires surface significantly improve the light absorption range. Furthermore, the graphene-carbon coated MoO 3 nanocopmosite (rGO/C-MoO 3 nanocomposite) exhibits excellent chemical stability and enhanced photocatalytic activity for methylene blue in aqueous solution under visible light irradiation compared to the bare MoO 3 nanowires and carbon coated MoO 3 nanowires (C-MoO 3 nanowires). The enhanced photocatalytic activity of rGO/C-MoO 3 nanocomposite could be attributed to the extended light absorption range, better adsorptivity of dye molecules and efficient separation of photogenerated electrons and holes. Overall, this work provides new insights that the as synthesized rGO/C-MoO 3 nanocomposite can be efficiently used as high performance photocatalysts to improve the environmental protection issues under visible light irradiation.