Degradation of tetrabromobisphenol A through peroxymonaosulfate oxidation activated by La0.5Sr0.5CoxMn1-xO3-δ perovskite
2021
Mao, Weida | Fan, Yan | Hu, Xiang
La₀.₅Sr₀.₅CoₓMn₁₋ₓO₃₋δ (LSCM) perovskite composite oxides prepared by co-doping of Co and Mn in B site-activated peroxymonosulfate (PMS) to degrade tetrabromobisphenol A. The characterization results indicated that the LSCM with x=0.3-0.8 have hexagonal R-3c structure. The activation effect of LSCM on PMS decreased gradually with the increase of Mn doping, among which LSCM82 (x=0.8) had good oxygen desorption performance certificated by O₂-TPD and lower relative acidity (1.975). Moreover, the redox pairs of Co/Mn multi-valence ions were the main contributor to its catalytic activity. The electron spin resonance results suggested that SO₄•⁻ and •OH existed in the system and SO₄•⁻ is the main free radical. Therefore, LSCM82 perovskite catalyst has broad application prospects in aqueous solutions.
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