氮化碳改性材料在光催化降解抗生素中的应用

Application of Carbon Nitride Modified Materials in Photocatalytic Degradation of Antibiotics

作为具有可诱发菌群抗药性等特殊生态效应的典型新污染物,抗生素的去除技术近年来备受关注。然而传统的水处理方法很难有效去除水中的微量抗生素,对生态环境、饮用水安全造成了威胁。光催化技术因具有反应条件温和、成本低、降解效率高且去除彻底等优势在抗生素的降解方面具有广泛的应用前景。氮化碳(CN)材料作为一种具有可见光响应的非金属光催化剂一直是光催化领域的研究热点。然而,纯CN存在太阳光吸收不足、表面积小和光生电子空穴对快速复合等问题,导致光催化活性低。通过元素掺杂和与其他材料形成异质结等改性策略可以有效改善CN的光催化性能,增强材料的光吸收,促进光生载流子的分离和传输。本文综述了CN改性光催化剂在其设计、光生载流子分离/转移机制及在抗生素光催化降解方面的重要进展,总结和展望了开发先进CN改性光催化剂的方向。

In recent years,the management of antibiotics has garnered significant attention due to their unique e cological effects,such as inducing antibiotic resistance.Traditional water treatment methods struggle to effectively eliminate trace amounts of antibiotics,posing threats to both ecological environment and drinking water safety.Photocatalysis technology,with its advantages of mild reaction conditions,low cost,high degradation efficiency,and thorough removal,holds great potential for the degradation of antibiotics.Carbon nitride(CN)materials,s erving as non-metallic photocatalysts responsive to visible light,have been a focal point in photocatalysis research.However,pure CN suffers from issues like insufficient sunlight absorption,small surface area,and rapid recombination of photogenerated electron-hole pairs,resulting in low photocatalytic activity.Modification strategies such as element doping and the formation of heterojunctions with other materials can effectively enhance the photocatalytic performance of CN,improving its light absorption,promoting the separation and transfer of photogenerated charge carriers.Here,we reviewed the significant progress in the design strategies and mechanisms of charge carrier separation/transfer in CN-modified photocatalysts,summarized their application in the photocatalytic degradation of antibiotics,and prospected the directions for developing advanced CN-modified photocatalysts.