ACF／TiO2光催化膜制备及其降解活性研究

Study on Preparation of ACF/TiO_2 Photocatalytic Film and Its Degradation of Activity

采用溶胶-凝胶法经正交试验优化物料比后制得TiO_2/ACF光催化膜,并用X-射线衍射对其结构进行表征;通过优化制备工艺参数,以及在紫外光作用下降解处理甲基橙废水,研究其光催化降解性能.结果表明:物料比为1:17.55:3.32:3.74:0.15(钛酸丁酯:无水乙醇:乙酰丙酮:去离子水:冰醋酸)、活化温度为350℃、焙烧3 h,能制得二氧化钛呈锐钛矿晶体结构的光催化膜;处理浓度为400 mg/L,pH值为4的甲基橙溶液,其脱色率达到98.3%,COD去除率达到86.2%.

In this paper, photocatalytic film of TiO2/ACF was preparated using sol - gel method through orthogonal experiment optimization materials ratio, and its structure was characterized by X-ray diffraction. By experiment parameters of preparation process was optimized. This paper also studied the performance of the photocatalytic degradate of methyl orange wastewater under UV. The result showes： selected ratio of 1 ： 17.55 ： 3.32 ： 3.74 ： 0. 15（Butyl titanate ： ethanol ： Acetylacetone ： deionized water ： acetic acid ）for the photocatalytic film, the activation temperature was 350℃, roasting time were three hours, the anatase crystal structure of TiO2 can be obtained. After degradating the orange solution with concentration of 400 mg /l and pH 4, its discoloration rate reaches 98. 3 %, COD removal reaches 86.2 %.