Durable antibacterial and UV-protective Ag/TiO<sub>2</sub>@fabrics for sustainable biomedical application

Abstract

Abstract: A facile method was developed to endow cotton fabric with remarkable antibacterial and ultraviolet (UV)-protective properties. The flower-like TiO 2 micro-nanoparticles were first deposited onto cotton fabric surface via hydrothermal deposition method. Then, the Ag NPs with a high deposition density were evenly formed onto TiO 2 @cotton surface by sodium hydroxide solution pretreatment and followed by in situ reduction of ANO 3 . This work focused on the influence of different hydrothermal reaction durations and the concentration of AgNO 3 on antibacterial activity against relevant microorganisms in medicine as well as on the UV-blocking property. Ag NPs-loaded TiO 2 @cotton exhibited high antibacterial activity with an inhibition rate higher than 99% against Staphylococcus aureus and Escherichia coli bacteria. Moreover, the as-prepared cotton fabric coated with Ag NPs and TiO 2 NPs demonstrated outstanding UV protective ability with a high ultraviolet protection factor value of 56.39. Morphological image of the cells revealed a likely loss of viability as a result of the synergistically biocidal effects of TiO 2 and Ag on attached bacteria. These results demonstrate a facile and robust synthesis technology for fabricating multifunctional textiles with a promising biocidal activity against common Gram-negative and Gram-positive bacteria. Keywords: TiO 2 nanoparticles, Ag nanoparticles, fabric, antibacterial, UV-shielding, biomedical