(NH4)2SO4-assisted polycondensation of dicyandiamide for porous g-C3N4 with enhanced photocatalytic NO removal

Abstract

Polymeric graphitic carbon nitride (g-C₃N₄) materials have attracted great interest due to their potential application in photocatalysis and optoelectronic devices. However, bulk g-C₃N₄ prepared from direct polycondensation still suffers from a high charge recombination rate and low photocatalytic activity. Herein, a facile (NH₄)₂SO₄-modified polycondensation strategy was developed for the synthesis of thin and porous g-C₃N₄. The (NH₄)₂SO₄ behaved as a dynamic gas template, exerting a promotive effect on the formation of porous g-C₃N₄. The as-prepared porous g-C₃N₄ has significant advantages of large surface area, enhanced charge separation, and more suitable band gap, thus demonstrating improved photocatalytic performance for the removal of NO from air.