Ti doped BaMnO3 perovskite structure as photocatalytic agent for the degradation of noxious air and water pollutants

Abstract

Photocatalytic degradation of noxious water and air impurities like Methylene blue (MB), Rhodamine B (RhB), NOx-, and CO is carried out by pristine and Ti-doped BaMnO3 (BaMn0.85 Ti0.15 O2.93, BMT). Perovskite BMT ceramic mixed with equimolar ratio of zeolite is used for investigation of water and air pollutant degradation. The synthesized Ti-doped BaMnO3 (BaMn0.85 Ti0.15 O2.93, BMT) perovskite was characterized using X-ray diffraction (XRD) and FE-SEM techniques. The XRD pattern of Ti-doped BaMnO3 shows the formation of two phases, namely BaMnO2.92 and BaMn0.85 Ti0.15 O2.93 and BMT. The photocatalytic degradation of noxious water and air pollutants were analyzed using UV–Vis and XPS for doped and pristine BaMnO3. From obtained results, it is observed that the synthesized BMT shows enhanced photocatalytic degradation (~ 99%) as compared to BaMnO3 toward noxious water impurities like RhB and MB dyes within 270 and 150 min under sunlight. The synthesized BMT compound shows the absorbance spectrum in the wavelength range of 200–600 nm. The UV–Vis DRS confirms the absorption edges for the compound above 400 nm i.e., visible light absorber with a bandgap 2.48 eV. On the other hand, XPS analysis of bulk BMT-zeolite on exposure to sunlight shows the complete degradation of adsorbed NOx gases from the BMT-zeolite surface as compared to the unexposed zeolite sample surface. Therefore, BMT can be used as active photocatalytic agent for the remediation of environmental noxious water and air pollutants.