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用溶胶-凝胶工艺在导电玻璃上制备出纳米ZnFe2O4薄膜,用X射线衍射仪、扫描电镜对膜的粒径、物相进行了表征,对不同层数的薄膜进行了光电催化性能测试。薄膜对甲基橙溶液的降解结果表明:随着ZnFe2O4薄膜层数的增多,对甲基橙的降解率先增大后减小,且以3层的ZnFe2O4膜片效果最好。当外加正向偏压时,薄膜的光催化性能有一定提高,且随着偏压增大而呈波动性增强。同时,薄膜与极板间的距离对薄膜的光电催化活性也有较大影响。
Nanostructured ZnFe2O4 thin films were prepared on conductive glass by sol-gel process. The particle size and phase of the films were characterized by X-ray diffraction and scanning electron microscopy. The photocatalytic properties of the films were tested. The degradation of methyl orange solution showed that the degradation rate of methyl orange firstly increased and then decreased with the increase of the number of ZnFe2O4 films, and the three layers of ZnFe2O4 film had the best effect. When the forward bias voltage is applied, the photocatalytic performance of the thin film increases to some extent and the volatility increases with the increase of the bias voltage. At the same time, the distance between the film and the plate also has a great influence on the photoelectrocatalytic activity of the film.