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采用溶胶-凝胶和浸渍-提拉而后煅烧的方法得到了在可见光作用下具有光催化性能的纳米ZnO/聚醋酸乙烯酯(PVAc)复合薄膜。通过正交设计实验,研究了PVAc的浓度、煅烧温度、煅烧时间、复合薄膜层数和附加ZnO膜层数等工艺因素对光催化性能的影响,并通过SEM,XRD和FT-IR对其进行了分析与表征。在室内普通照明用白炽灯作用下,以甲基橙溶液为催化对象,PVAc含量10%的、在250℃煅烧30min所得到的纳米ZnO/PVAc复合薄膜的光催化性能的实验结果表明,复合薄膜对甲基橙降解率达60%,而使用250℃煅烧30min所得到的纳米ZnO4层薄膜或PVAc4层薄膜催化的甲基橙溶液的浓度变化很小。
The nano-ZnO / polyvinyl acetate (PVAc) composite films with photocatalytic activity under visible light were obtained by sol-gel and dipping-pulling and then calcined. The effects of technological factors such as concentration of PVAc, calcination temperature, calcination time, the number of composite thin films and the number of additional ZnO films on the photocatalytic properties were studied by orthogonal design experiments. The effects of these factors on the photocatalytic properties were investigated by SEM, XRD and FT-IR Analysis and Characterization In the indoor general lighting incandescent lamp, methyl orange solution as the catalyst object, PVAc content of 10%, at 250 ℃ calcined 30min obtained nano-ZnO / PVAc composite film photocatalytic performance of the experimental results show that the composite film Methyl orange degradation rate of 60%, and use 250 ℃ calcined 30min obtained nano-ZnO4 layer film or PVAc4 film-catalyzed methyl orange solution concentration changes little.