Enhanced UV-Vis-NIR photocatalytic activity of La doped BaBiO2Cl: Role of oxygen vacancies

In order to make the most of solar energy, the development of efficient UV-Vis-NIR activated photocatalysts has attracted more and more attention. In this study, the UV-Vis-NIR broad spectrum activated photocatalysts La -doped BaBiO2Cl with abundant oxygen vacancies (OVs) were successfully prepared by solid state reaction. The experimental results and theoretical calculations revealed that La doping induced OVs in BaBiO2Cl, formed an intermediate level, extended the light absorption to the NIR region, and promoted carrier separation efficiency. Owing to the synergistic promotion effect, the optimal BaBiO2Cl-3%La exhibited obviously enhanced photo -degradation rate, which was about 3.26 times higher than that of pure BaBiO2Cl under UV-Vis-NIR light irradiation. This work provides a resultful strategy for designing new full-spectrum-activated photocatalysts for environmental protection.

Automated summary

In this study, La-doped BaBiO2Cl photocatalysts with abundant oxygen vacancies were successfully prepared and showed enhanced photocatalytic activity under UV-Vis-NIR light irradiation. The introduction of La doping extended the light absorption range and improved carrier separation efficiency, leading to a significantly higher photo-degradation rate compared to pure BaBiO2Cl.