Fig xA a Raman spectra acquired from
Ag2O with narrow band gap of ∼1.2 eV has been found to be an efficient visible light photocatalyst  and . Recently, the composite photocatalysts based on Ag2O are considered as a great choice to enhance the photocatalytic activity owing to the synergistic effects of Ag2O and other component on promoting the A 844606 of the photo-generated electron–hole pairs , , ,  and . Yu et al.  fabricated Bi2WO6–Ag2O composites via an impregnation method and found that they showed better photocatalytic activity in the degradation of methyl orange (MO) with a degradation rate of 61% under visible light irradiation than pure Bi2WO6. Shi et al.  reported that g-C3N4–Ag2O composites prepared using a co-precipitation method had higher photocatalytic activity in the degradation of MO with a degradation rate of 90% under visible light irradiation than pure g-C3N4. Yu et al.  reported that Ag2CO3–Ag2O composites synthesized via a one-step calcination method exhibited enhanced photocatalytic activity in the degradation of Rhodamine B with a degradation rate of 98% under visible light irradiation. Similarly, the incorporation of Ag2O into Bi2O3 to form hybrid photocatalyst should be a promising method to improve the photocatalytic activity of Bi2O3. In fact, leaf primordia has been reported on fabricating Ag2O–Bi2O3 (BA) composites to improve the photocatalytic activity of Bi2O3. However, this study has focused on photocatalytic degradation of dye, and there have been no reports on the utilization of for BA composites for photocatalytic degradation of phenol.