An all-organic spatial structure composed of perylene diimide/mesoporous graphitic carbon nitride for high efficiency photocatalysis

Abstract

The development of semiconductor photocatalytic technology is still limited to low carrier separation efficiency and secondary contamination of metal ions. The construction of bandgap-matched all-organic semiconductor materials is environmentally friendly and can achieve directional carrier migration and efficient separation. Herein, a series of perylene diimide/mesoporous graphitic carbon nitride (PDI/mpg-C3N4) all-organic composites with spatial stereostructure were successfully fabricated via in-situ electrostatic assembly. The spatial structure composed of perylene diimide/mesoporous graphitic carbon nitride exhibit outstanding light absorption properties and rapid separation and migration abilities of photocarriers, which greatly enhance solar energy utilization. The experiment results exhibit that the bisphenol A (BPA) degradation rate of the 20% perylene diimide/mesoporous graphitic carbon nitride (20% PDI/mpg-C3N4) composite attained to 3.4 and 7.3 times than that of the self-assembled perylene diimide (self-assembled PDI) and mesoporous graphitic carbon nitride (mpg-C3N4). This work provides ideas for constructing organic catalysts with high photocatalytic performance.