Antibacterial cotton fabric with fluorescent properties based on bismuth-based perovskite quantum dots with silica coating

Abstract

The development of functional antibacterial cotton fabrics with fluorescent properties simple preparation remains a challenge and has yet to be achieved in the case of cotton fabrics with both fluorescent and antibacterial properties so far. In this research, two kinds of silica-coated bismuth-based perovskite quantum dots (Cs3Bi2Br9 QDs@SiO2) of fluorescence and antibacterial properties were prepared via sol-gel method, which using (3-aminopropyl)triethoxysilane (APTES) and tetraethoxysilane (TEOS) as silica precursors respectively. The brighter performance of Cs3Bi2Br9 QDs@SiO2 prepared by APTES may due to the passivation effect of amino groups on Cs3Bi2Br9 QDs. The Cs3Bi2Br9 QDs@SiO2 possessed regular, robust spherical morphologies and stable water and UV performance properties, exhibited almost constant fluorescence intensity after 90 hours of exposure. After grafting on the cotton fibers, the Cs3Bi2Br9 QDs@SiO2 displayed excellent antibacterial properties protection of the cotton fibers. The antibacterial properties were explored by in the zone of inhibition testing method confirmed that the nanogels had excellent antibacterial capability for both Staphylococcus aureus and Escherichia coli. Moreover, the grafted cotton fibers emerged strong blue luminescence even after 81 days when being exposed in Ultraviolet light environment, which is expected to be used in fluorescent intelligence cotton fibers. This study provides a potential idea for development of high-performance and multifunction cotton fabrics.