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

被引:8
作者
Zhou, Hexin [1 ,2 ]
Li, Bing [2 ]
Liu, Jun [3 ]
Yang, Wenxiu [2 ]
Wang, Wei [1 ]
Hu, Xuemin [2 ]
Wang, Shuo [2 ]
机构
[1] Changshu Inst Technol, Dept Text & Garment Engn, Suzhou 215500, Peoples R China
[2] Hebei Univ Sci & Technol, Coll Text & Garments, Innovat Ctr Text & Garment Technol, Shijiazhuang 050018, Hebei, Peoples R China
[3] Hebei Univ Sci & Technol, Sch Environm Sci & Engn, Shijiazhuang 050018, Peoples R China
关键词
Au/TiO2; Simultaneous fabric bleaching; SMSI; Photocatalytic; HYDROGEN-PEROXIDE; CARBON NITRIDE; COMPOSITES; MECHANISM; TIO2; STABILITY; WATER;
D O I
10.1016/j.psep.2023.12.061
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A novel tandem reaction system formed with H2O2 production and in situ fabric bleaching reaction was firstly designed and constructed with Au/TiO2 photocatalyst. Results showed H2O2 generated in situ achieved highefficiency fabric bleaching under the sunlight excitation, thus successfully constructing a ready -to -use system.center dot OH was confirmed as the main active specie in the simultaneous fabric bleaching reaction. Herein, to ensure the sufficient H2O2 production is a key factor. The different intensity of strong metal -support interaction (SMSI) was introduced into Au/TiO2 by regulating the calcination atmosphere to boost the H2O2 yield. H2/Ar calcination atmosphere imparted Au/TiO2 the SMSI effect to make H2O2 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 H2O2 generation and decomposition rates, thus giving a better final yield. This work not only offer a novel path to improve H2O2 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.
引用
收藏
页码:355 / 364
页数:10
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