LaFeO_3和SrFeO_(3-λ)对水溶性染料的光催化降解

Studies on Photo-catalytic Degradation of Perovskite-type Oxides: LaFeO_3 and SrFeO_(3-λ)

采用柠檬酸法合成钙钛矿型复合氧化物LaFeO3和SrFeO3 λ,并以其为光催化剂对不同水溶性染料进行光催化降解实验。结果表明 :SrFeO3 λ的光催化活性明显高于LaFeO3,这与A位离子 (La3+ 、Sr2 + )的电子构型的不同有关。

Degradation experiments of various water soluble dyes were performed in a suspension system of LaFeO\-3 and SrFeO\-\{3 λ\} prepared by citrate method. A fluorescent Hg lamp was used as irradiation source. The experimental results presented evident photo catalytic activities of perovskite type oxides, of which SrFeO\-\{3 λ\} showed stronger activities than LaFeO\-3. This is attributed to the unique electronic structure of the ion A(La\+\{3+\}, Sr\+\{2+\}).