The roles of photogenerated charged and reactive species including h+,e-,·O2-,H2O2,·Ohbulk or ·Ohsurface in visible-light-driven (VLD) photocatalytic degradation of pollutants and disinfection of bacteria is still a controversial issue.In this study,a selected VLD photocatalyst,B-Ni-codoped TiO2 (BNT) microsphere,was used to study their VLD photocatalytic activities for dye degradation and bacterial disinfection.The BNT microsphere was prepared by an aerosol-assisted flow synthesis method with a surface area of 90 m2/g and band gap energy of 2.25 eV1.Under visible light irradiation,the as-prepared BNT microspheres showed high photocatalytic degradation of the selected synthetic dye,Rhodamine B (RhB),and disinfection of the selected bacterium,Escherischia coli K-12.