C ₄ N quantum dots/g-C ₃ N ₄ nanosheets organic homogeneous structure self-assembly for efficient charge separation and photocatalytic hydrogen evolution

C 4 N quantum dots/g-C 3 N 4 nanosheets composites are prepared via self-assembly process, which show excellent photocatalytic H 2 production, 2 times than original g-C 3 N 4 nanosheets due to narrow band gap and unique band structure of C 4 N quantum dots.