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采用La(NO_3)_3·6H_2O、Fe(NO_3)_3·9H_2O、Sc(NO_3)_3和柠檬酸作为主要原料,通过微波辅助法成功制备了La1-xScxFeO3(x=0,0.025,0.05,0.075,0.1)光催化剂。分别用TG-DTA、XRD、SEM、FT-IR以及激光粒度分析仪对样品进行了表征,并研究其对甲基橙溶液的光催化降解活性。结果表明,制得的样品均为钙钛矿结构;Sc掺杂的LaFeO3比纯的LaFeO3光催化剂具有更好的光催化性能,最佳掺杂量为x=0.025制得的La0.975Sc0.025FeO3催化剂经2h可见光照射,对10mg/L甲基橙溶液的降解率达到了86.8%,比纯的LaFeO3催化剂提高了22.4%,这表明La0.975Sc0.025FeO3是一类活性高的催化剂,具有广泛的应用前景。
La1-xScxFeO3 (x = 0,0.025,0.05,0.075, La0.05,0.075) was successfully prepared by microwave assisted method using La (NO_3) _3 · 6H_2O, Fe (NO_3) _3 · 9H_2O, Sc (NO_3) _3 and citric acid as the main raw materials. 0.1) photocatalyst. The samples were characterized by TG-DTA, XRD, SEM, FT-IR and laser particle size analyzer respectively. The photocatalytic degradation of methyl orange solution was also studied. The results show that the prepared samples are of perovskite structure; Sc-doped LaFeO3 photocatalyst has better photocatalytic activity than pure LaFeO3 photocatalyst, the best doping amount is x = 0.025 obtained La0.975Sc0.025FeO3 After 2 h of visible light irradiation, the degradation rate of 10 mg / L methyl orange solution reached 86.8%, which was 22.4% higher than pure LaFeO3 catalyst, indicating that La0.975Sc0.025FeO3 is a kind of high activity catalyst with a wide range of Application prospects.