combustion fabrication of bismuth-rich bismuth oxybromide and precipitation synthesis of plasmonic silver oxide and their performance evaluation for ao7 photodegradation

Herein, the bismuth-rich bismuth oxybromide (bi24o31br10) nanosheets was synthesized by a auto-combustion method and plasmonic silver oxide (ag-ag2o) as narrow-band gap nanophotocatalyst was synthesized by a facile precipitation and their performance was compared in the degradation of 20 mg/l acid orange 7 (ao7) over 1 g/l photocatalyst and solution ph. the mentioned nanophotocatalyts were characterized by xrd and fesem analyses. the consequences obtained from xrd demonstrated that the samples were fabricated well. the fesem results also exhibited the nanosheet morphology for bi24o31br10 and large spherical particles for ag-ag2o. moreover, the results of reactor tests exhibited that after 120 min simulated sunlight irradiation, the degradation percentage of ao7 over the ag-ag2o particles and bi24o31br10 nanosheets was 94.0% and 27.2%, respectively. the high activity of the ag-ag2o nanophotocatalyst could be devoted to its suitable bandgap, high activity in the solar light region originating from the high absorption light, which could lead to the increase of excitons (electron-hole pairs), and the plasmonic effect of ag particles.