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Silver orthophosphate (Ag 3 PO 4 ) is an attractive photocatalytic catalyst for disinfection and degradation, but its instability arising from silver release generates significant environmental issue. Aiming to develop a highly efficient and environmental-friendly catalyst, we synthesized Ag 3 PO 4  nanoparticle incorporated hierarchical porous silica (Ag 3 PO 4 @ h -SiO 2 ) as a novel high-performance photocatalytic catalyst without observed silver release. Brain-like hierarchical porous SiO 2  ( h -SiO 2 ) brings a scaffold support with high surface areas, and the  h -SiO 2  surface modified thiols are able to anchor in situ formed 10 nm Ag 3 PO 4  to eliminate silver release. Systematic investigations revealed that because of its structural advantages, Ag 3 PO 4 @ h -SiO 2  show excellent disinfection and degradation ability under visible-light irradiation and stable characteristics without obviously observed silver leaching during photo-oxidation operation. In-depth scavenger study reveals Ag 3 PO 4 @ h -SiO 2  as an effective semiconducting photocatalyst stimulates the production of photo-generated reactive species, which dominate its distinguished disinfection performance via photo-oxidation. Graphical abstract Ag 3 PO 4  are anchored to thiol modified hierarchical porous SiO 2  to produce a visible-light responsive photocatalyst of Ag 3 PO 4 @h-SiO 2 . The enhanced catalytic sites and surface areas promote pathogen disinfection, and the structure advantages minimize silver release to environment. Both H 2 O 2  and holes being generated in photocatalysis dominate overall disinfection activity.

Exploring hierarchical porous silica-supported Ag3PO4 as high-efficient and environmental-friendly photocatalytic disinfectant