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在模板剂(C3H6O.C2H4O)x(P123)的作用下,采用溶胶-凝胶-程序升温溶剂热一步法制备了纳米复合材料H6P2W18O62/TiO2-ZrO2(P123)。通过傅里叶-红外光谱(FT-IR)、紫外-可见漫反射(UV-Vis/DRS)、X-射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜配合X-射线能量色散谱仪(SEM-EDS)和N2吸附-脱附等测试手段对其组成、结构和表面物理化学性质等进行了表征。结果表明,所合成的纳米复合材料H6P2W18O62/TiO2-ZrO2(P123)中多酸结构保持比较完整,复合材料具有锐钛矿晶型结构,属于介孔材料,模板剂P123使合成产物分布更加均匀。选取甲基橙(MO)作为模型分子,考察了该复合材料在微波辐射作用下的光催化性能。实验结果表明,该复合材料有较好的光催化活性,对甲基橙的降解效果明显高于TiO2、H6P2W18O62、H6P2W18O62/TiO2和H6P2W18O62/TiO2-ZrO2。
The nanocomposite H6P2W18O62 / TiO2-ZrO2 (P123) was prepared by one-step sol-gel-temperature-programmed solvothermal method under the action of the template agent (C3H6O.C2H4O) x (P123). The structures of the samples were characterized by Fourier transform infrared spectroscopy (FT-IR), UV-Vis / DRS, XRD, TEM and X-ray energy dispersive Spectrometer (SEM-EDS) and N2 adsorption-desorption and other testing methods were characterized by its composition, structure and surface physico-chemical properties. The results show that the structure of polyacid in H6P2W18O62 / TiO2-ZrO2 (P123) is relatively intact. The composites have anatase crystal structure and belong to mesoporous materials. The template P123 makes the distribution of the synthesized products more uniform. Methyl orange (MO) was chosen as the model molecule to investigate the photocatalytic activity of the composites under microwave irradiation. The experimental results show that the composite has good photocatalytic activity and the degradation effect on methyl orange is obviously higher than that of TiO2, H6P2W18O62, H6P2W18O62 / TiO2 and H6P2W18O62 / TiO2-ZrO2.