Synergy between superhydrophobicity and photocatalysis: crafting robust self-cleaning coatings on leather surface

Self-cleaning coating intergrates the superhydrophobicity and photocatalysis. • PDMS-TiO 2 boosts coating superhydrophobicity and Cs 2 AgBiBr 6 stability. • Coating achieves complete Rh B degradation within 4 h under visible light. Light-coloured leather goods easily accumulate surface stains, which requires professional cleaning, thus raising usage costs and limiting their application scenarios. Self-cleaning coatings integrating the photocatalysis with superhydrophobic function can effectively address this issue. In this study, a multilayer coating was prepared on leather surface via layer-by-layer spraying method using polyurethane, SiO 2 , Cs 2 AgBiBr 6 , and polydimethylsiloxane-modified TiO 2 . The prepared coating demonstrated excellent water-based pollutant removal performance. Under optimal conditions, it exhibited a contact angle of 163° and a sliding angle of 8°. RhB could be degraded after 4 h of visible light irradiation. Notably, this coating also shows good durability, physical mechanical and hygienic properties. The purpose of this work is to further promote the industrialization of more efficient self-cleaning leather. Download: Download high-res image (225KB) Download: Download full-size image