非光催化条件下用于高级氧化的无金属g-CN催化剂的双机制研究
Dual-Mechanism Study of Metal-Free g-CN Catalysts for Advanced Oxidation Under Non-Photocatalytic Conditions.
作者信息
Yang Zixu, Sun Yang, Wang Weizhi, Yuan Xiaohan, Tian Pengfei, Xu Jing
机构信息
State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
Key Laboratory of Pressure Systems and Safety (Ministry of Education), School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China.
出版信息
Molecules. 2025 Jan 10;30(2):247. doi: 10.3390/molecules30020247.
Metal-free materials have been proved to be promising replacements of traditional metal-based catalysts for advanced oxidation reactions. Carbon nitride was found to be able to activate HO and generate hydroxyl radicals (•OH). Nevertheless, the performance of carbon nitride is highly dependent on an external light source. In this work, we report a light-independent, metal-free catalyst based on g-CN prepared using a facile calcination method. It is revealed that two reaction pathways, a radical (•OH) one and a nonradical (HO) one, coexist in organics oxidation on g-CN. The dominant reaction pathway is dependent on the condensation temperature of UCN. In addition, this g-CN exhibited excellent stability after being recycled and reused for five cycles. The findings in this work can be used for the design of efficient and robust metal-free catalysts with both superior catalytic performance and high stability for various heterogeneous catalytic processes.
无金属材料已被证明是用于高级氧化反应的传统金属基催化剂的有前途的替代品。人们发现氮化碳能够激活HO并产生羟基自由基(•OH)。然而，氮化碳的性能高度依赖于外部光源。在这项工作中，我们报道了一种基于g-CN的无需光照的无金属催化剂，该催化剂采用简便的煅烧方法制备。结果表明，在g-CN上的有机物氧化过程中，存在两种反应途径，一种是自由基(•OH)途径，另一种是非自由基(HO)途径。主要反应途径取决于UCN的缩合温度。此外，这种g-CN在循环使用五次后表现出优异的稳定性。这项工作中的发现可用于设计高效且稳定的无金属催化剂，这些催化剂在各种多相催化过程中具有优异的催化性能和高稳定性。
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