Constructing isotype CN/s-CN heterojunction with enhanced photocatalytic performance

Synthesis of highly efficient isotype carbon nitride/carbon nitride (CN/CN) heterojunction, is a hot topic in the photocatalysis field. In this study, isotype CN/s-doped CN heterojunction is facile constructed with mixed precursor (melamine and trithiocyanuric acid). The structures and properties of CN/s-CN samples are systematically characterized by XRD, IR, TEM, TG, UV–vis, XPS, electrochemical and photo-catalytic degradation test. The synergistic CN and s-CN can significantly overcome the intrinsic drawback of rapid h+-e− recombination of CN or s-CN only. The CN/s-CN altered electronic structure, including narrowed band gap, upshifted band edge potential and improved electronic conductivity, and achieves 2.1 times activity than that of pristine CN.