双模板剂制备三元介孔复合体及其光催化研究

Synthesis and Photocatalytic Properties of Ternary Nanocomposite by Double Templates

采用双模板法和溶胶-凝胶法合成了大孔径的纳米复合物TiO2/ZrO2/SnO2。通过小角XRD、N2吸附/脱附和紫外-可见光谱等多种手段进行表征。研究发现,与单模板剂制备的样品相比,用双模板剂制备出的样品孔径呈多孔径分布。通过对罗丹明B的降解表明用双模板剂制备的介孔材料的活性高于用单模板剂制备的介孔材料的活性。

TiO2/ZrO2/SnO2 nanocomposite with large pore was prepared by sol- gel method with Pluronic P123 and Macrogol 20000 as double template. The structure and physicochemical property of the composite were characterized by small - angle powder X - ray diffraction （SAXS） and N2 adsorption - desorption. The photocatalytic efficieneies of the product were assessed by monitoring the photodegradation of Rhodamine B （RhB）. The results showed that the doping of SnO2 retard the crystal phase transformation from anatase - TiO~ to rutile - TiO：. The materials had relatively regular pores and high specific surface area, and two types of pores attributed to the usage of double template. The photocatalytic reac- tions confirmed that the sample prepared by double templates showed higher photocatalytic activity than that of the sample prepared by single template.