Tri-s-triazine-Based Crystalline Graphitic Carbon Nitrides for Highly Efficient Hydrogen Evolution Photocatalysis
Tri-s-triazine-Based Crystalline Graphitic Carbon Nitrides for Highly Efficient Hydrogen Evolution Photocatalysis
复制标题
用于高效析氢光催化的三均三嗪基结晶石墨碳氮化物
DOI：
10.1021/acscatal.6b00922
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发表时间：
2016-06-01
期刊：
影响因子：
12.9
通讯作者：
Wang, Xinchen
中科院分区：
文献类型：
--
作者：
Lin, Lihua;Ou, Honghui;Wang, Xinchen
石墨碳氮化物（g-CN）是一种新兴的无金属光催化剂，用于通过分解水和固定CO2来转换太阳能。本文中，我们使用预热的三聚氰胺作为起始材料结合盐熔融法来合成结晶三均三嗪基g-CN。所得到的样品表现出高的稳定性和光催化活性，对氢气和氧气的生产从水裂解。此外，通过添加磷酸盐模拟自然光合环境，在405 nm处产氢的表观量子产率（AQY）达到50.7%，这是迄今报道的共轭碳氮化物聚合物在析氢过程中的最高值。这项研究的结果表明，结晶共价三均三嗪框架太阳能应用前景广阔。
Graphitic carbon nitride (g-CN) is an emerging metal-free photocatalyst for solar energy conversion via water splitting and CO2 fixation. Herein, we used preheated melamine as a starting material in combination with the salt melt method to synthesize a crystalline tri-s-triazine-based g-CN. The as-obtained sample exhibited high stability and photocatalytic activity toward hydrogen and oxygen production from water splitting. In addition, by adding phosphate to mimic natural photosynthetic environment, the apparent quantum yield (AQY) for the hydrogen production reached 50.7% at 405 nm, which is the highest value ever reported for conjugated carbon nitride polymers in hydrogen evolution photocatalysis. The results of this study demonstrate that crystalline covalent tri-s-triazine frameworks hold great promise for solar energy applications.