Preparation of Antibacterial Ag-TiO2 Nanostructured Coating on Fabric Surface via Peroxo-titanium Complex by Photochemistry

• Published in: ACS applied nano materials 2024-07, Vol.7 (14), p.16525-16533
• Main Authors: Feng, Lijuan, Jiang, Huazhou, Qiu, Yongxiang, Bu, Qingsong, Wu, Liangzhuan, Deng, Gongming, Cheng, Mingming, Ma, Daichuan, Luo, Daibing
• Format: Article
• Language: English
• ISSN: 2574-0970; 2574-0970
• DOI: 10.1021/acsanm.4c02532

This research focuses on the development of a facile synthesis-coating method for cotton blended fabric samples with enhanced antibacterial property. Ag-TiO2 coatings on fabric surface were prepared by Peroxo-UV-Fenton-like (PUFL) method, which combines the peroxidation of titanium ions using hydrogen peroxide (H2O2) and assisted by UV photon energy. The Ag-TiO2 sol was first synthesized by the peroxo reaction from the peroxo-titanium-complex (PTC) precursor in aqueous solution at room temperature. Then the as-prepared Ag-TiO2 sol was coated onto the fabric surface by photochemical in situ crystallization and solidification, yielding in crystallized Ag-TiO2 nanoparticles (NPs). High-resolution transmission electron microscopy (HRTEM), scanning electronic microscopy (SEM), X-ray diffraction (XRD), UV–vis spectra, and X-ray photoelectron spectroscopy (XPS) were used to characterize the PUFL Ag-TiO2 NPs formed in the coatings, which had an average size of 5 nm in diameter with a high monodispersity. The crystallization quality of the PUFL Ag-TiO2 NPs was as good as that prepared by thermal treatment at high temperature. This PUFL method has advantages including mild operation and good adhesion. The fabric samples used in the train carriages were coated with the PUFL Ag-TiO2 NPs and further applied for antibacterial tests, which showed excellent sterilization for 30 lasting days.