Fei Jia, Peng Xin, Jiang Longbo, Yuan Xingzhong, Chen Xiangyan, Zhao Yanlan, Zhang Wei
National & Local United Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, P.R. China.
Dalton Trans. 2021 Nov 30;50(46):16887-16908. doi: 10.1039/d1dt02367e.
Graphitic carbon nitride (g-CN), an appealing metal-free polymer, has featured in extensive research in heterogeneous Fenton-like reactions owing to its advantages of stable chemical and thermal properties, ease of structural regulation and unique redox ability. However, there are still some gaps in the understanding of the mechanism and fate of g-CN and its derivatives in heterogeneous Fenton reaction degradation of contaminants. This paper gives systematic emphasis to the development and progress of g-CN and its composites as catalysts in heterogeneous Fenton-like reactions. The main synthesis strategies of g-CN composites are discussed, including calcination, hydrothermal method and self-assembly method. Then, the key catalytic properties of g-CN in Fenton-like applications, including anchoring nanoparticles, increasing specific surface area and exposed active surface sites, as well as regulating charge transfer reactions, are highlighted. Special emphasis is placed on its multifunctional role in heterogeneous Fenton-like reactions and the mechanisms involved in the activation of hydrogen peroxide, persulfates, and photocatalytic activation of persulfate. Lastly, the existing challenges and possible development direction of g-CN-coupling Fenton reactions are proposed. It is believed that this paper will bring useful information for the development of graphitic carbon nitride in both laboratory studies and practical applications.
石墨相氮化碳（g-CN）是一种引人注目的无金属聚合物，由于其具有化学和热稳定性好、易于结构调控以及独特的氧化还原能力等优点，在非均相类芬顿反应中受到了广泛研究。然而，在理解g-CN及其衍生物在非均相芬顿反应降解污染物过程中的作用机制和归宿方面仍存在一些差距。本文系统地阐述了g-CN及其复合材料作为非均相类芬顿反应催化剂的发展历程和研究进展。讨论了g-CN复合材料的主要合成策略，包括煅烧法、水热法和自组装法。然后，重点介绍了g-CN在类芬顿应用中的关键催化性能，包括锚定纳米颗粒、增加比表面积和暴露的活性表面位点，以及调节电荷转移反应。特别强调了其在非均相类芬顿反应中的多功能作用以及过氧化氢、过硫酸盐的活化机制和过硫酸盐的光催化活化机制。最后，提出了g-CN耦合芬顿反应目前存在的挑战和可能的发展方向。相信本文将为石墨相氮化碳在实验室研究和实际应用中的发展提供有益信息。
