Achieving Efficient Incorporation of π-Electrons into Graphitic Carbon Nitride for Markedly Improved Hydrogen Generation
Achieving Efficient Incorporation of π-Electrons into Graphitic Carbon Nitride for Markedly Improved Hydrogen Generation
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实现π电子与石墨碳氮化物的有效结合，显着提高氢气的产生
DOI：
10.1002/anie.201813117
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发表时间：
2019-02-11
影响因子：
16.6
通讯作者：
Lin, Zhiqun
中科院分区：
文献类型：
--
作者：
Li, Jing;Wu, Dandan;Lin, Zhiqun
一种将C引入g-C3 N4中的快速且高效的策略涉及通过简单的微波辅助加热使富含π电子的巴比妥酸与三聚氰胺共聚，从而消除了传统电炉加热中的问题，例如由于巴比妥酸和三聚氰胺的升华温度不匹配而导致的严重挥发。优化C掺杂含量后的g-C3 N4催化剂在可见光照射下以25.0 μ molh（-1）的最高H-2生成速率主动生成增加量的H-2，这比使用通过常规电炉加热两种相同单体制备的g-C3 N4（1.3 μ molh（-1））高近20倍。因此，微波辅助加热策略可以作为将π电子并入g-C3 N4中的极其简单的途径而脱颖而出，具有显著改善的光催化性能。
A rapid and highly efficient strategy for introducing C into g-C3N4 involves copolymerizing pi-electron-rich barbituric acid with melamine via a facile microwave-assisted heating, thereby eliminating the issues in conventional electric furnace heating, such as the severe volatilization, owing to the mismatch of the sublimation temperatures of barbituric acid and melamine. The g-C3N4 catalyst after optimizing the C-doping content actively generates increased amounts of H-2 under visible light exposure with the highest H-2 generation rate of 25.0 mu molh(-1), which is nearly 20 times above that using g-C3N4 produced by conventional electric furnace heating of two identical monomers (1.3 mu molh(-1)). As such, the microwave-assisted heating strategy may stand out as an extremely simple route to incorporating pi-electrons into g-C3N4 with markedly improved photocatalytic performance.