Hierarchically structured Ag modified nanosilica constructed by micelle modification tactics delivers integrated catalytic and antibacterial activity

•Micelle modification tactic was developed for constructing Ag modified nanosilica.•Hierarchically structured nanosilica sphere could be formed.•The resulting nanocomposite has ultrahigh porous properties (1370 m2 g−1, 1.583 m3 g−1).•The obtained nanocomposite affords excellent catalytic activity for MB reduction.•The nanocomposite can efficiently kill multidrug-resistant (MDR) strain of Mycobacterium Tuberculosis