光催化
氮化碳
材料科学
石墨氮化碳
胺气处理
光化学
氢键
氮化物
可见光谱
制氢
碳纤维
化学工程
催化作用
化学
纳米技术
分子
有机化学
复合材料
复合数
工程类
光电子学
图层(电子)
作者
Dawoon Jang,Sang Hyoun Choi,Nam Hee Kwon,Kyeong Yeon Jang,Suyeon Lee,Tae‐Woo Lee,Seong‐Ju Hwang,Hyungjun Kim,Jeongho Kim,Sunghee Park
标识
DOI:10.1016/j.apcatb.2022.121313
摘要
Carbon nitride (C3N4) exhibits significant potential as a metal-free photocatalyst for H2 production using visible light. While the C3N4 network consists of tri-s-triazine building units linked by H bonds, it is still controversial how the H bonds affect the photocatalytic performance. In this study, we present a water-assisted method for production of polymeric carbon nitride to control intraplanar structures associated with H bonds and amine bridges. The C3N4 samples produced with a thermal treatment using water and humidified air gas (CN-H) exhibit excellent photocatalytic activities for the hydrogen evolution reaction. From structural and photophysical characterizations, it is found that CN-H samples contain fewer H bonds and more amine bridging groups as well as possess larger domains than C3N4 samples produced without using water (CN-A). These structural changes induced by the water treatment lead to efficient intraplanar migration of photoexcited charge carriers and thus are responsible for the enhanced photocatalytic performances.
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