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Title: BiOClBr-coated fabrics with enhanced antimicrobial properties under ambient light
Authors: Khin, Mya Mya
Bao, Yueping
Liang, Yen Nan
Setyawati, Magdiel Inggrid
Gnayem, Hani
Ng, Kee Woei
Sasson, Yoel
Hu, Xiao
Keywords: Engineering::Materials
Issue Date: 2021
Source: Khin, M. M., Bao, Y., Liang, Y. N., Setyawati, M. I., Gnayem, H., Ng, K. W., Sasson, Y. & Hu, X. (2021). BiOClBr-coated fabrics with enhanced antimicrobial properties under ambient light. Journal of Materials Chemistry B, 9(13), 3079-3087.
Journal: Journal of Materials Chemistry B
Abstract: This study demonstrates the fabrication of ambient light enabled antimicrobial functional fabrics by coating flower-like bismuth oxyhalide i.e. BiOCl₀.₈₇₅Br₀.₁₂₅, with the use of poly(vinyl alcohol) (PVA) and poly(acrylic acid) (PAA) as binders for improved coating robustness and durability. The uniformity of the microparticles was ensured with simultaneous probe sonication during the stages of crystal nucleation and growth. The polymeric binders not only strongly anchor the particle on the fabric, but also serve as an ultra-thin protective layer on the BiOClBr that mitigates bismuth leaching. The efficacy of inhibiting bacteria was investigated over the BiOClBr-coated fabrics i.e. cotton and polyester, and the results showed that the coated fabrics could effectively inhibit both Gram-positive and Gram-negative bacteria, i.e. S. aureus and E. coli. In comparison with fabrics coated with other photocatalytic materials including bismuth oxide (Bi₂O₃) and zinc oxide (ZnO), an exceptionally better antimicrobial efficacy was observed for BiOClBr-coated fabrics. The BiOClBr-coated cotton showed ∼5.0 and ∼6.8 times higher disinfection efficacy towards E. coli compared to that of ZnO and Bi₂O₃-coated cotton with the same particle weight percentage, respectively. Further elucidation of the probable mechanism by BiOClBr-coated fabrics is related to the excess amount of reactive oxygen species (ROS). Overall, BiOClBr has been shown to be a promising material to fabricate cost-effective antimicrobial functional surfaces for both environmental and biomedical applications e.g. protective laboratory and factory clothing.
ISSN: 2050-750X
DOI: 10.1039/D0TB02835E
Schools: School of Materials Science and Engineering 
Research Centres: Nanyang Environment and Water Research Institute 
Rights: © 2021 The Royal Society of Chemistry. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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