期刊
RENEWABLE ENERGY
卷 178, 期 -, 页码 757-765出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2021.06.066
关键词
g-C3N4; Chitosan; Carbon self-doped; Delocalized big pi bonds; Photocatalytic H-2 production; Solar-to-H-2 conversion
资金
- National Natural Science Foundation of China [31971616, 22006057]
- Science and Technology Development Project of Jilin Province [YDZJ202101ZYTS070]
- Natural Science Foundation Project of Jilin Provincial Science and Technology Development Plan [20190201277JC]
- Youth Talent Lifting Project of Jilin Province [181907]
- Doctor of Mass entrepreneurship and innovation Project in Jiangsu Province
This study successfully fabricated carbon self-doped g-C3N4 using a rational one-step copolymerization strategy, which significantly improved its electrical conductivity, extended its visible-light absorption region, and remarkably enhanced the mobility of photoinduced electron-hole pairs. The engineered CCN showed dramatically boosting photocatalytic H-2-evolved activity and extremely long-term durable stability, suggesting its great potential in designing high-performance g-C3N4 photocatalysts for renewable solar-to-H-2 conversion.
Graphitic carbon nitride (g-C3N4) with unique physicochemical features has garnered much attention in artificial photosynthesis, yet the photoactivity of pristine g-C3N4 (PCN) is severely restricted because of its rapid charge recombination rate and narrow visible-light absorption. To this end, for the first time, here we reported a rational one step copolymerization strategy for the fabrication of carbon self-doped g-C3N4 (CCN) by using melamine and chitosan as the starting materials. Experimental results indicated that the bridged N atoms were substituted by C atoms in the g-C3N4 matrix, resulting in the formation of delocalized big pi bonds, thereby the obviously increased the electrical conductivity, remarkably extended the visible-light absorption region, and significantly improved the mobility of photoinduced electron-hole pairs. Consequently, the as-engineered CCN with abundant mesopores structure showed a dramatically boosting photocatalytic H-2 -evolved activity (1224 umol g(-1) h(-1)), 4.5-folds than PCN powders. Eventually, the resulting CCN exhibited an extremely long-term durable stability after storing in reaction solution for 90 days. Our work will bring about potential application in designing of high-performance g-C3N4 photocatalyst for renewable solar-to-H-2 conversion. (C) 2021 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据