Phosphate modification over semiconductor photocatalyst was an effective route to promote photodegradation of organic pollutants. Studies on promoted O2 adsorption, better charge separation, and free ∙OH radicals raised from phosphate modification are clear, whereas O2 activation and the generated reactive oxygen species (·O2-, H2O2, and 1O2) have been ignored. Herein, the hydrogen bond network constructed between BiOCl surface and phosphate weaken the surface Bi-O bond thus benefit the formation of oxygen vacancy (OVs). OVs not only facilita...
