Homogeneous Carbon/Potassium-Incorporation Strategy for Synthesizing Red Polymeric Carbon Nitride Capable of Near-Infrared Photocatalytic H2 Production
Homogeneous Carbon/Potassium-Incorporation Strategy for Synthesizing Red Polymeric Carbon Nitride Capable of Near-Infrared Photocatalytic H2 Production
复制标题
合成可近红外光催化 H-2 生产的红色聚合物氮化碳的均质碳/钾掺入策略
DOI：
10.1002/adma.202101455
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发表时间：
2021-08-08
影响因子：
29.4
通讯作者：
He, Qianjun
中科院分区：
文献类型：
--
作者：
Xu, Yangsen;Fan, Mingjian;He, Qianjun
高效利用近红外光光催化制氢对太阳能氢能和氢医学都具有重要意义，但由于半导体材料对近红外光响应性、禁带宽度和氧化还原电位的严格要求，目前仍是一个挑战。在此，通过使用与三聚氰胺（C3 H6 N6）前体类似结构的掺杂剂与固体KCl来实现NIR活性炭/钾掺杂的红色聚合氮化碳（RPCN）。碳和钾的均匀和高掺入显著地使氮化碳的带隙（1.7 eV）变窄，并赋予RPCN在NIR照射（700 nm）下以140 μ mol h（-1）g（-1）的速率从水中放出H-2的高NIR光催化活性
The efficient utilization of near-infrared (NIR) light for photocatalytic hydrogen generation is vitally important to both solar hydrogen energy and hydrogen medicine, but remains a challenge at present, owing to the strict requirement of the semiconductor for high NIR responsiveness, narrow bandgap, and suitable redox potentials. Here, an NIR-active carbon/potassium-doped red polymeric carbon nitride (RPCN) is achieved for by using a similar-structure dopant as the melamine (C3H6N6) precursor with the solid KCl. The homogeneous and high incorporation of carbon and potassium remarkably narrows the bandgap of carbon nitride (1.7 eV) and endows RPCN with a high NIR-photocatalytic activity for H-2 evolution from water at the rate of 140 mu mol h(-1) g(-1) under NIR irradiation (700 nm