通过溶胶-凝胶和静电纺丝技术相结合的方法，成功制备不同复合浓度聚乙烯吡咯烷酮(PVP)/钛酸四正丁酯(Ti(OC4H9)4)/钨酸铵(N5H37W6O24·H2O)前驱体。通过控温煅烧获得不同煅烧温度、不同复合浓度的TiO2/WO3微纳米纤维复合材料。采用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、场发射扫描电子显微镜(FE-SEM)和紫外-可见漫反射光谱(UV-Vis )技术对样品进行表征。以亚甲基蓝(MB)的光降解为模型反应，研究TiO2/WO3微纳米纤维复合材料在紫外光照射下的光催化活性。结果表明，煅烧温度500℃时， n(Ti)：n(W)=12：1形成WO3掺杂的TiO2微纳米纤维及n(Ti)：n(W)=4：1形成的TiO2/WO3复合微纳米纤维的光催化活性均高于纯TiO2。
PVP/Ti(OC4H9)4/N5H37W6O24·H2O precursors with different Ti/W molar ratios were successfully syn-thesized by a simple combination method of Sol-Gel and electrospinning techniques. The electrospun precursors was converted into TiO2/WO3 micro-nanofibers via calcination at different temperatures in air. The obtained sam-ples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (FE-SEM) and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis) techniques. Photocatalytic activity was evaluated by degradation of methylene blue (MB) under ultraviolet light irradiation. The results showed that WO3-doped TiO2 micro-nanofibers with Ti/W molar ratio of 12:1 and TiO2/WO3 micro-nanofi-bers with Ti/W molar ratio of 4:1 after calcination at 500℃exhibited better photocatalytic degradation activity than that of pure TiO2 micro-nanofibers.
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