Construction of novel tandem reaction system coupling H2O2 production with in situ bleaching over Au/TiO2 photocatalyst with different metal-support interactions.

Autor: Zhou, Hexin1,2 (AUTHOR), Li, Bing2 (AUTHOR), Liu, Jun3 (AUTHOR), Yang, Wenxiu2 (AUTHOR), Wang, Wei1 (AUTHOR) wangweiwei8660@126.com, Hu, Xuemin2 (AUTHOR), Wang, Shuo1,2 (AUTHOR) fzwangshuo@hebust.edu.cn
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Zdroj: Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B. Mar2024, Vol. 183, p355-364. 10p.
Abstrakt: A novel tandem reaction system formed with H 2 O 2 production and in situ fabric bleaching reaction was firstly designed and constructed with Au/TiO 2 photocatalyst. Results showed H 2 O 2 generated in situ achieved high-efficiency fabric bleaching under the sunlight excitation, thus successfully constructing a ready-to-use system.·OH was confirmed as the main active specie in the simultaneous fabric bleaching reaction. Herein, to ensure the sufficient H 2 O 2 production is a key factor. The different intensity of strong metal-support interaction (SMSI) was introduced into Au/TiO 2 by regulating the calcination atmosphere to boost the H 2 O 2 yield. H 2 /Ar calcination atmosphere imparted Au/TiO 2 the SMSI effect to make H 2 O 2 yield exceed that of counterpart under air atmosphere after 6 h of continuous reaction. The controllable capsulating overlayer on Au NPs provided relatively fewer exposed Au active sites to balance the H 2 O 2 generation and decomposition rates, thus giving a better final yield. This work not only offer a novel path to improve H 2 O 2 generation performance,but also propose new ideas for realizing in situ bleaching using sunlight as driving force and cleaning production of textile printing and dyeing industry. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE
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