Rapid Microwave Synthesis of Mesoporous Oxygen-Doped g-C3N4 with Carbon Vacancies for Efficient Photocatalytic H2O2 Production,ACS Sustainable Chemistry & Engineering

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Rapid Microwave Synthesis of Mesoporous Oxygen-Doped g-C3N4 with Carbon Vacancies for Efficient Photocatalytic H2O2 Production
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-05-05 , DOI: 10.1021/acssuschemeng.1c01012
Hang Xie ₁ , Yanmei Zheng ₁ , Xinli Guo ₁ , Yuanyuan Liu ₁ , Zheng Zhang ₁ , Jianjie Zhao ₁ , Weijie Zhang ₁ , Yixuan Wang ₁ , Ying Huang ₂

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Oxygen-doped g-C₃N₄ (CN) with carbon vacancies (O–CNC) was synthesized by microwave heating the mixture of melamine–cyanuric acid (MCA) supramolecular aggregates and oxalic acid for only 7 min. The as-synthesized O–CNC shows a mesoporous structure and exhibits a tunable band structure, optimized charge separation, and significantly enhanced two-electron reduction for H₂O₂ production. The photocatalytic H₂O₂ production rate reaches 2008.4 μmol h^–1 g^–1 under simulated sunlight irradiation, which is more than 4 times higher than that of pristine bulk CN. The enhanced photocatalytic performance is attributed to the synergistic effects of the mesoporous structure with a large specific surface area, doped oxygen atoms, and carbon vacancies. These results have provided a facile and efficient way for realizing the practical application of CN in photocatalytic H₂O₂ production.

中文翻译：

具有碳空位的微波微波快速合成介孔掺氧gC ₃ N ₄，用于高效光催化H ₂ O _2的生产

通过微波加热三聚氰胺-氰尿酸（MCA）超分子聚集体和草酸的混合物仅7分钟，即可合成具有碳空位（O-CNC）的氧掺杂gC ₃ N ₄（CN）。刚合成的O–CNC具有中孔结构，并具有可调节的能带结构，优化了电荷分离，并显着增强了H ₂ O ₂产生的两电子还原。H ₂ O ₂的光催化产率达到2008.4μmolh ^–1 g ^–1在模拟的日光照射下，是原始散装CN的4倍以上。增强的光催化性能归因于介孔结构具有大的比表面积，掺杂的氧原子和碳空位的协同效应。这些结果为实现CN在光催化H ₂ O ₂生产中的实际应用提供了简便有效的方法。

更新日期：2021-05-17

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