Few-layer graphitic carbon nitride nanosheet with controllable functionalization as an effective metal-free activator for peroxymonosulfate photocatalytic activation: Role of the energy band bending

Hai Guo, Huai-Yuan Niu, Chao Liang, Cheng‐Gang Niu, Yu Liu, Ning Tang, Yang Yang, Huiyun Liu, Ya-Ya Yang, Wenjun Wang