Research Progress on Photocatalytic Degradation of Organic Pollutants in Water by Nonmetal Doping Modified g-C3 N4.

In recent years, as a new visible light responsive nonmetal photocatalyst, graphite-phase carbon nitride (g-C₃ N₄) has been widely used for organic pollutants removal in photocatalysis system due to its suitable band gap width characteristic, enough active sites and low cost. However, the drawback of its low visible-light utilization and fast recombination of photogenerated electron-hole pairs that play negative effect on its photocatalytic activity. Combine with the nonmetal properties of g-C₃ N₄, nonmetal doping is an effective strategy to further improve the photocatalytic performance of g-C₃ N₄, and has attracted more and more attention on photocatalysis. In this paper, the common preparation methods of non metal doped g-C₃ N₄ composite materials are introduced. In addition, the research progress of different nonmetal doped g-C₃ N₄ applied in photocatalytic degradation of organic pollutants is summarized in detail, and its mechanism of photocatalytic degradation of organic pollutants under visible light is also discussed. Finally, the challenges and suggestions for the photocatalytic degradation of organic pollutants in water by nonmetal doped g-C₃ N₄ are proposed, and this review also helps to provide insights into the removal of organic pollutants by nonmetal doped g-C₃ N₄ coupled photocatalysis. [ABSTRACT FROM AUTHOR]