The impact of alkaline earth oxides on Bi₂O₃ and their catalytic activities in photodegradation of Bisphenol A

Authors: ÜMRAN ÜNLÜ, SEVGİ KEMEÇ, GÜLİN SELDA POZAN SOYLU

Abstract: The BPA into wastewater has posed a threat to environment and human health. Hence, we aimed to eliminate BPA in a short time and with a rapid degradation rate from food wastewater. Herein, the effects of different alkaline-earth oxide doped with Bi₂O₃ nanoparticles on the photocatalytic degradation of bisphenol A were investigated. SrO-Bi₂O₃, CaO-Bi₂O₃, and MgO-Bi₂O₃ binary oxides were prepared by wet-impregnation method. The structural and optical features of catalysts were clarified BET, XRD, DRS, FT-IR, PL, and SEM techniques. The photocatalytic activities of catalysts were compared for different light sources. Considering that the characterization analysis and experimental results, the highly improved photocatalytic activity was mainly attributed to the effective structure of the SrO-Bi₂O₃ binary oxide and the strong alkali properties in the nanocomposite. Obviously, 5wt% SrO-Bi₂O₃ photocatalyst showed more excellent degradation performance and highest degradation reaction rate (0.21 mg l^-1 min^-1) within 30 min. It was observed that the photocatalytic activity improved by the additive of alkaline oxide on Bi₂O₃.

Keywords: Photocatalysis; alkaline earth oxide; Bisphenol A; degradation; UV-B irradiation

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