Self-sterilizing ormosils surfaces based on photo-synzthesized silver nanoparticles.

•A straightforward and robust antibacterial coating was developed.•The coating consists in phosphotungstate ormosil doped with core-shell (SiO2@TiO2).•Silver nanoparticles were included in the coating by photoassisted synthesis.•The coating is able to eradicate Gram(+) and Gram(−) bacteria.•The antimicrobial activity remains high until three reutilization cycles.