Fabrication of graphitic carbon nitride-based nanocomposites photocatalyst for degradation of organic pollutants: A Review

Abstract Semiconductor-based photocatalyst has been used for the degradation of the organic pollutant from wastewater. Metal oxides (ZnO, TiO 2 ) and graphitic carbon nitride (g-C 3 N 4 ) has been widely used as a catalyst among various semiconductors. However, pure g-C 3 N 4 suffers from significant disadvantages, including poor disparity, low surface area, and high electron-hole pairs recombination, and metal oxides (ZnO and TiO 2 ) are only UV light-responsive, which reduces photocatalytic activity. We have explained various methods for fabrication of ZnO-g-C 3 N 4 and TiO 2 -g-C 3 N 4 nanocomposite to develop visible light responsive photocatalyst with high surface area, low bandgap, reduce electron-hole pairs recombination, and porous structure. The photocatalytic activity of graphitic carbon-based (ZnO-g-C 3 N 4 and TiO 2 -g-C 3 N 4 ) nanocomposites towards organic pollutants are systematically mentioned in this review. The synergetic effect of g-C 3 N 4 and metal oxide in nanocomposite also mention by the photocatalytic mechanism.