In suit inducing electron-donating and electron-withdrawing groups in carbon nitride by one-step NH4Cl-assisted route: A strategy for high solar hydrogen production efficiency

Owing to insufficient active sites, strongly bound excitons and insufficient optical absorption, polymer semiconductors have only shown mild activity as potential candidates for photocatalysis. A g-C 3 N 4 with improved optical absorption capacity, charge transfer performance and porosity was successfully prepared by a one-step NH 4 Cl-assisted route. Interaction of melamine with NH 4 Cl preparation of Porous g-C 3 N 4 (CN-xy) with active functional groups modified pore wall shown to result in highly crystalline species with a maximum π-π layer stacking distance of heptazine units of 0.321 nm, decreases the optical band gap from 2.80 to 2.13 eV and maximum surface area reached 56.485 m 2  g −1 . The balanced improvement of the multiple defects of g-C 3 N 4 makes the photocatalytic degradation of RhB and the photocatalytic hydrogen production efficiency 4 and 5 times higher than the pristine g-C 3 N 4 , respectively.