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 [26] and [27]. 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 [28], [29], [30], [31] and [32]. Yu et al. [33] 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. [34] 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. [35] 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[36]. 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.