Efficient photocatalytic performance of hydrogen bonding between P25 and microcrystalline cellulose aerogel

A series of MC/P25 composite aerogels (MCAPs) were newly designed by the sol-gel method and CO 2 supercritical drying technology. Under visible light irradiation, the optimized MCAP exhibits enhanced photocatalytic performance with a AO7 degradation rate of 0.01746 min −1 , which is 6.6 times higher...

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Bibliographic Details
Published in:RSC advances 2024-11, Vol.14 (5), p.37546-37553
Main Authors: Zen, Junhao, Zhang, Di, Dou, Guoliang, Zeng, Qingming, Zhang, Jian
Format: Article
Language:English
Subjects:
Aerogels
Crystalline cellulose
Hydrogen bonding
Light irradiation
Photocatalysis
Photodegradation
Photoelectric effect
Photoluminescence
Sol-gel processes
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Summary:A series of MC/P25 composite aerogels (MCAPs) were newly designed by the sol-gel method and CO 2 supercritical drying technology. Under visible light irradiation, the optimized MCAP exhibits enhanced photocatalytic performance with a AO7 degradation rate of 0.01746 min −1 , which is 6.6 times higher than that of P25. The enhanced photocatalytic performance can be mainly ascribed to the constructed H-bonds between microcrystalline cellulose and P25. Photocurrent-time curves and photoluminescence spectra all certified the increased photogenerated carrier transfer rates of MCAP due to the presence of H-bonds. This work indicates that the presence of H-bonds can efficiently transfer photo-induced electrons and limit the recombination of photogenerated carriers. Furthermore, as a 3D aerogel photocatalyst, the photocatalytic stability is improved. A series of MC/P25 composite aerogels (MCAPs) were newly designed by the sol-gel method and CO 2 supercritical drying technology.
ISSN:2046-2069
2046-2069
DOI:10.1039/d4ra07087a