Abstract
Barium phosphate (Ba(3)(PO(4))(2)) is a class of material that has attracted significant attention thanks to its chemical stability and versatility. However, the use of Ba(3)(PO(4))(2) as a photocatalyst is scarcely reported, and its use as a photocatalyst has yet to be reported. Herein, Ba(3)(PO(4))(2) nanoflakes synthesis is optimized using sol-gel and hydrothermal methods. The as-prepared Ba(3)(PO(4))(2) powders are investigated using physicochemical characterizations, including XRD, SEM, EDX, FTIR, DRS, J-t, LSV, Mott-Schottky, and EIS. In addition, DFT calculations are performed to investigate the band structure. The oxidation capability of the photocatalysts is investigated depending on the synthesis method using rhodamine B (RhB) as a pollutant model. Both Ba(3)(PO(4))(2) samples prepared by the sol-gel and hydrothermal methods display high RhB photodegradation of 79% and 68%, respectively. The Ba(3)(PO(4))(2) obtained using the sol-gel process exhibits much higher stability under light excitation after four regeneration cycles. The photocatalytic oxidation mechanism is proposed based on the active species trapping experiments where O(2) (•‒) is the most reactive species. The finding shows the promising potential of Ba(3)(PO(4))(2) photocatalysts and opens the door for further investigation and application in various photocatalytic applications.