Ozone Modification Nanoarchitectonics of BiOBr Photocatalysts for Enhanced Nitrogen Fixation Performance

BiOBr-based photocatalysts have received extensive interest for photocatalytic nitrogen fixation due to their layered structure recently. In this study, BiOBr with enhanced photocatalytic nitrogen fixation performance was synthesized via a facile ozone modification method. Characterization results demonstrated that the ozone treated BiOBr photocatalysts have identical crystal structures, morphologies, and enhanced photocatalytic nitrogen fixation performance. In addition, due to the strong oxidation of ozone, more oxygen vacancies and active sites form on the BiOBr surface, which could improve the nitrogen fixation efficiency. Furthermore, a supposed photocatalytic nitrogen fixation mechanism of the ozone treated BiOBr is proposed.