Nanospherical carbon nitride frameworks with sharp edges accelerating charge collection and separation at a soft photocatalytic interface.

Shape engineering of a g-C3 N4 framework, with interconnecting nanosheets and highly open-up spherical surfaces with sharp edges, can easily accelerate charge separation and promote mass transfer for photoredox catalysis, achieving an apparent quantum yield of 9.6% at 420 nm in an assay of the photocatalytic hydrogen evolution reaction.