固相法合成锌铁氧体及其光催化性能

采用硝酸锌、硝酸铁、草酸以及软模板剂聚乙烯醇，通过室温固相研磨反应，制备出二元草酸盐混合前驱体，经600℃灼烧3h，对所获红棕色粉末用SEM、XRD表征，结果表明合成了一维棒状的锌铁氧体（ZnFe2O4）。使用合成产物降解葸和芘以及有机染料亚甲基蓝，通过荧光和紫外分析法考察其光催化性能和效果。讨论了光催化降解机理，考察了光催化剂用量、作用时间以及自然光和紫外光不同光照条件对催化效果的影响。适宜条件下，蒽和芘的降解率分别达到94．51％和56．05％，对亚甲基蓝的降解率达到48．93％

Synthesis of Zinc Ferrite by Solid-state Method and Its Photocatalytic Property

The binary oxalate precursor was prepared by solid-state reaction at room temperature with Zn （NO3） 2 · 6H2 O, Fe（ NO3 ）2· 9H2O, Oxalic acid and PVA as soft template. Then, the red-brown powders were characterized by SEM and XRD after calcination at 600 ℃ for 3 h. The results show that the one dimensional rod-like Zinc ferrite （ZnFe2O4 ） was obtained. Anthracene, pyrene and methylene blue were degraded with synthetic products, and the photocatalytic performance and effect were investigated by fluorescence and UV. The photocata-lytic degradation mechanism was discussed, and the effects of the catalyst amount, illumination time and the different illumination （natural light or ultraviolet light） on the photocatalytic process were investigated. As selection of optimum operation parameters, the degradation of efficiency of anthracene and pyrene were 95.19% and 96.46% respectively, the degradation efficiency of methylene blue was 48.93 %.