g-C3N4/B doped g-C3N4 quantum dots heterojunction photocatalysts for hydrogen evolution under visible light

Developing high activity and eco-friendly photocatalysts for water splitting is still a challenge in solar energy conversion . In this paper, B doped g-C 3 N 4 quantum dots (BCNQDs) were prepared via a facile molten salt method using melamine and boron oxide as precursors. By introducing BCNQDs onto the surface of g-C 3 N 4 , g-C 3 N 4 /BCNQDs heterojunction was constructed via hydrothermal treatment . The resulting g-C 3 N 4 /BCNQDs heterojunction exhibits enhanced hydrogen evolution performance for water splitting under visible light irradiation . The mechanism underlying the improved photocatalytic activity was explored and discussed based on the formation of heterojunction between g-C 3 N 4 and BCNQDs with well-matched band structure .