Photocatalytic Degradation of Gentian Violet Using Ba_xSr_(1-x)Fe_(0.5)Co_(0.5)O_(3-δ)

摘要

Perovskite oxides Ba_xSr_(1-x)Fe_(0.5)Co_(0.5)O_(3-δ) (x = 0.2, 0.4) were synthesized by citrate method. The structures and the morphology of the prepared samples were characterized by X-ray diffraction and scanning electron microscopy. The photocatalytic degradation property of Gentian violet in aqueous solution was investigated using Ba_xSr_(1-x)Fe_(0.5)Co_(0.5)O_(3-δ) as the photocatalysts. The effects of irradiation time, catalyst dose, initial concentration and pH value on the degradation were explored systematically under the irradiation of a 400 W high pressure mercury lamp. The optimum reacted conditions were that irradiation time was 60 and 80 min, catalyst dose 0.2 and 0.22 g in 100 mL 10 mg/L Gentian violet solution using Ba_(0.2)Sr_(0.8)Fe_(0.5)Co_(0.5)O_(3-δ) and Ba_(0.4)Sr_(0.6)Fe_(0.5)Co_(0.5)O_(3-δ), respectively, initial concentration and pH value were Gentian violet 5 mg/L and 3.08 for both photocatalysts.