Photocatalytic degradation of reactive brilliant blue KN-R by Ti-doped BiO.

In this study, different compositions of Ti-doped BiO photocatalytic materials were prepared by chemical solution decomposition method. It was used to degrade reactive brilliant blue KN-R, and then characterized by XRD, SEM, UV-vis DRS, XPS, photocurrent, and other detection methods. The results show that when the catalyst dosage is 1.0 g/L and the initial concentration of reactive brilliant blue KN-R is 20 mg/L, the degradation rate of pure BiO to reactive brilliant blue KN-R is 75.30%; the Ti doping amount is 4% (4Ti/BiO), 4Ti/BiO had the best degradation effect on reactive brilliant blue KN-R, and the degradation rate could reach 93.27%. When 4Ti/BiO was reused for 4 times, the degradation rate of reactive brilliant blue KN-R only decreased by 6.91%. Doping Ti can inhibit the growth of BiO grains, making the XRD peak of Ti/BiO material wider. The pure BiO particles are larger and the surface is smooth. With the increase of Ti doping content, the surface of Ti/BiO material grows from roughness to nanofibrous BiTiO. The visible light absorption performance and electron separation and transfer ability of BiO are significantly improved by doping Ti ions. The band gap is reduced from 2.81 to 2.75 eV. In conclusion, doping Ti enhances the visible light absorption and electron separation and transfer capabilities of BiO, reduces the band gap, and improves the surface morphology, which makes BiO have higher photocatalytic performance.