Heterojunction photocatalyst of cavity shaped Bi2S3/g-C3N4 for bisphenol a degradation: Regulation of internal electric field via assistance of interfacial functional groups

The p-n heterojunction with internal electric field (IEF) is flourishingly developed in photocatalysis. Enlarging the space charge region width can effectively improve the migration/separation of charge carriers. Here, adequate functional groups (–COOH, -N-(C)3, -C-N–H) were generated from graphitic carbon nitride (GCN) decomposition, worked as the dispersant and electric charge contributor in the heterojunction. Bi ions were adsorbed on –COOH...