非金属掺杂改性g-C3N4光催化降解水中有机污染物的研究进展

近年来，石墨相氮化碳(g-C₃N₄)以其合适的带隙宽度、丰富的活性位点和成本低廉等优点，成为新兴的可见光响应非金属光催化剂，被广泛应用于光催化降解有机污染物领域。然而，纯g-C₃N₄对可见光的吸收效率较低且光生电子和空穴复合速率快，导致其光催化活性处于较低水平。基于g-C₃N₄的非金属特性，通过非金属掺杂可以有效提高g-C₃N₄的光催化性能，引起了学者们的广泛关注。本文介绍了目前非金属掺杂g-C₃N₄复合材料常见的制备方法，着重归纳了不同类型的非金属掺杂g-C₃N₄光催化降解水中有机污染物的相关研究进展，探讨其作为光催化剂在可见光条件下降解有机污染物的相关机理。最后，提出目前g-C₃N₄基复合材料在光催化降解水中有机污染物中所面临的挑战，旨在为非金属掺杂g-C₃...

Research Progress on Photocatalytic Degradation of Organic Pollutants in Water by Nonmetal Doping Modified g-C3N4

In recent years, as a new visible light responsive nonmetal photocatalyst, graphite-phase carbon nitride (g-C₃N₄) 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-C₃N₄, nonmetal doping is an effective strategy to further improve the photocatalytic performance of g-C₃N₄, and has attracted more and more attention on photocatalysis. In this paper, the common preparation methods of non metal doped g-C₃N₄ composite materials are introduced. In addition, the research progress of different nonmetal doped g-C₃N₄ 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-C₃N₄ are proposed, and this review also helps to provide insights into the removal of organic pollutants by nonmetal doped g-C₃N₄ coupled photocatalysis.