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采用层层自组装法成功制备了兼具磁性和光催化活性的双功能Fe_3O_4@SiO_2/(TiO_2/PW_(12))_(10)复合微球,利用扫描电镜、红外光谱和X-射线能谱仪对所得微球进行了结构和形貌的表征。以甲基橙为模型污染物,研究了紫外光下Fe_3O_4@SiO_2/(TiO_2/PW_(12))_(10)的光催化性质,系统考察了甲基橙溶液的初始浓度、溶液pH和无机氧化剂碘酸钾对复合膜催化效率的影响。动力学研究表明,在不同浓度甲基橙溶液中,染料的光催化降解遵循表观一级反应动力学。磁性Fe_3O_4纳米粒子的使用实现了反应后催化剂方便、快速和高效地分离回收。
The bifunctional Fe_3O_4 @ SiO_2 / (TiO_2 / PW_ (12)) _ (10) composite microspheres with both magnetic and photocatalytic activity were successfully prepared by layer-by-layer self assembly method. Scanning electron microscopy, infrared spectroscopy and X-ray energy dispersive spectroscopy The instrument obtained the microstructure of the microstructure and morphology of the characterization. The photocatalytic properties of Fe_3O_4 @ SiO_2 / (TiO_2 / PW_ (12)) _ (10) under UV light were studied using methyl orange as a model pollutant. The effects of initial concentration of methyl orange solution, solution pH and inorganic Effect of Oxidant Potassium Iodate on Catalytic Efficiency of Composite Membrane. Kinetic studies have shown that in different concentrations of methyl orange solution, the photocatalytic degradation of the dye to follow the apparent first-order reaction kinetics. The use of magnetic Fe_3O_4 nanoparticles to achieve the catalyst after the reaction convenient, rapid and efficient separation and recovery.