摘要
光催化技术是解决能源危机和环境污染的有效途径,石墨相氮化碳(g-C3N4)被认为是一种有前途的光催化材料,但高载流子复合率严重限制了其光催化活性,通过构建核壳结构形成紧密且大面积接触的异质结,可有效促进光生载流子的分离效率.基于此,研究核壳结构的g-C3N4基异质结成为热点,通过介绍核壳结构的主要功能及核壳结构材料的应用,阐述g-C3N4基核壳异质结光催化剂的性能和优势,重点讨论g-C3N4基核壳异质结的构筑策略,包括水/溶剂热法、超声辅助自组装法、热处理法,并归纳总结合成过程中g-C3N4的生长机制,分析g-C3N4基核壳异质结光催化材料面临的挑战及未来发展方向,旨在为新型高效g-C3N4基核壳异质结光催化材料的设计与开发提供有益参考.
Abstract
Photocatalytic technique is an effective method to solve the problems of energy conversion and environmental remediation,and graphitic carbon nitride(g-C3N4)has been considered as a promising photocatalytic material.However,the high carrier recombination rate severely limits the photocatalytic activity of g-C3N4.Constructing core-shell structure to form heterojunction with tight connection interfaces and large contact area has proved to be an excellent strategy to improve the carrier separation efficiency.Therefore,the research on core-shell structured g-C3N4-based heterojunction photocatalysis becomes a hot spot.In this review,the main functions of core-shell structure and the applications of core-shell structured materials are introduced.The performance and advantages of g-C3N4-based core-shell heterojunction photocatalytic materials are elaborated.The preparation methods of core-shell structured g-C3N4-based heterojunctions and the growth mechanism of g-C3N4 in the synthetic process are emphatically discussed.Finally,challenges and perspectives for the future research and development of g-C3N4-based core-shell heterojunctions are analyzed.This review will provide guidance for the development of new and efficient g-C3N4-based core-shell structured photocatalytic materials.
基金项目
国家自然科学基金(22202135)
辽宁省自然科学基金(2021-BS-157)
沈阳师范大学大学生创新创业训练项目(X202210166089)
维普
万方数据