Triethanolamine interface modification of crystallized ZnO nanospheres enabling fast photocatalytic hazard-free treatment of Cr(vi) ions

The hazard-free treatment of Cr( ) ions is critical in modern industry. Photocatalytic reduction and detoxification are high-potential strategies. Photocatalysts with high efficiency, low cost, environmental friendliness, and easy mass products are required. In this study, we report a facile strateg...

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Bibliographic Details
Published in:Nanotechnology reviews (Berlin) 2021-08, Vol.10 (1), p.847-856
Main Authors: Su, Xiaowen, Wang, Zehua, Huang, Yuan, Miao, Zhenyu, Wang, Shuhua, Wang, Jianjun, Zhang, Xiao Li, Sun, Xiaomin, Liu, Hong, Sang, Yuanhua
Format: Article
Language:English
Subjects:
Chromium
Crystallization
Detoxification
Emergency preparedness
Emergency response
Ions
Nanospheres
Photocatalysis
Photocatalysts
photoreduction of Cr
photoreduction of cr(vi)
Reabsorption
surface modification
Triethanolamine
Water pollution
Zinc oxide
ZnO
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Summary:The hazard-free treatment of Cr( ) ions is critical in modern industry. Photocatalytic reduction and detoxification are high-potential strategies. Photocatalysts with high efficiency, low cost, environmental friendliness, and easy mass products are required. In this study, we report a facile strategy using triethanolamine (TEOA) as a capping ligand to modify the surface of ZnO nanospheres. The experimental and theoretical results reveal that the presence of TEOA on the surface was beneficial for electron enrichment on Zn and hole transfer to TEOA and can photocatalytically reduce Cr( ) by almost 100% in 5 min. The photocatalytic property of TEOA-modified ZnO could be renewed by the reabsorption of TEOA in solution. The great sedimental properties benefit photocatalyst recycling and renewal, which also provides high potential for water pollution and environmental emergency responses applications.
ISSN:2191-9097
2191-9089
2191-9097
DOI:10.1515/ntrev-2021-0060