In situfabrication of hierarchically porous g-C3N4 and understanding on its enhanced photocatalytic activity based on energy absorption

A novel strategy is proposed to in situ synthesize hierarchically porous g-C3N4 foam (FCN) with no carbon residue by low-cost polyurethane sponge as single template. The porous system consists of interconnected micron- (1–2 μm) and nano-scale (20–80 nm) pores, which is usually constructed tediously. For visible light catalysis, the FCN with unique hierarchical pores possesses higher efficiency for H2 generation (8 times) and phenol degradation...