期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 607, 期 -, 页码 1061-1070出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.09.034
关键词
Carbon nitride nanosheet; Porous structure; Wide-spectrum; Photocatalysis; Solar fuel
资金
- National Nature Science Foundation of China [52104254, 21975193, 22075072]
- Research Project of Hubei Provincial Department of Education [Q20202501]
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology Open Foundation [PA200208]
A facile strategy was reported to significantly increase solar spectrum absorption of functionalized porous carbon nitride nanosheets (MFPCN) through molecule self-assembly engineering coupled thermal polymerization, enhancing wide-solar-spectrum absorption and photocatalytic performance.
Carbon nitride (C3N4) is a promising metal-free photocatalyst for solar-to-energy conversion, but bulk carbon nitride (BCN) shows insufficient light absorption, sluggish photocarrier transfer and moderate activity for photocatalysis. Herein, a facile strategy to significantly increase solar spectrum absorption of the functionalized porous carbon nitride nanosheets (MFPCN) via molecule self-assembly engineering coupled thermal polymerization is reported. This strategy can greatly enhance the wide-solar-spectrum absorption of MFPCN up to 1000 nm than most reported carbon nitride-based photocatalysts. Experimental characterizations and theoretical calculations together display that this strategy could introduce hydroxyl groups into the structure of MFPCN as well as the rich pores and active sites at the edges of framework, which can narrow the bandgap and accelerate the transfer and separation of photoinduced carries. As a result, the optimal MFPCN photocatalyst exhibit the excellent photocatalytic hydrogen evolution rate of 7.745 mmol g(-1)h(-1) under simulated solar irradiation, which is approximate to 13 times that of BCN with remarkable durable CO2 reduction activities. New findings in this work will provide an approach to extend solar spectrum absorption of metal-free catalysts for solar fuel cascades. (C) 2021 Elsevier Inc. All rights reserved.
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