Rapid bacteria trapping and killing of metal-organic frameworks strengthened photo-responsive hydrogel for rapid tissue repair of bacterial infected wounds

•Prussian blue and modified chitosan were used to synthesize photothermal hydrogels.•Prussian blue nanoparticles could strengthen the hydrogels as cross-linker.•The electropositive hydrogels could capture bacteria and kill them combined with heat.•The hydrogels could kill 99.97% S. aureus and 99.93% E. coli under light irradiation.