中文摘要：

纳米TiO2材料在光催化、抗菌等方面有着广泛应用。采用尺寸为20～30nm的TiO2颗粒与聚乙烯吡咯烷酮（PVP）的醇溶液混合制得纺丝液,通过静电纺丝技术与烧结工艺,制得TiO2纳米纤维。采用能谱仪、X射线衍射、扫描电子显微镜和投射电子显微镜等分析手段对样品进行了表征,与采用溶胶–凝胶结合静电纺丝技术得到的TiO2纳米纤维进行了形貌对比,并通过亚甲基蓝降解实验研究其光催化性能。结果表明：以TiO2纳米颗粒为原料通过静电纺丝技术制备的TiO2纳米纤维,主要为多晶相的锐钛矿结构,直径为150～250 nm,长度大于20μm,与溶胶–凝胶结合静电纺丝技术制得的TiO2纳米纤维相比,直径分布更为均匀。在紫外光照射90min时,对浓度为4mg/L的亚甲基蓝溶液的分解率为72%,具有较好的光催化效率。

英文摘要：

TiO2 nano-materials have a wide range of applicatipns in the ：fields of photo-catalysis and antimicrobial. TiO2 nanofibers were prepared via eleetrospinning and sintering technology, using TiO2 nano-particles （20-30 nm） and the polyvinylpyrrolidone （PVP） by the electrospinning device. Comparatively, using the solution prepared by Ti（OC4Hg）4 to obtain TiOz nanofibers for contrast, and photocatalytic measurements on methylene blue trihydrate solution are performed. The samples were characterized by energy dispersive spectra, X-ray diffraction, scanning electron microscope and transmition electron microscope. The result shows that the TiO2 nanofibers can be successfully prepared via an electrospinning technology, by using TiO2 nano-particles, the diameters were 150-250 nm, the length were more than 20um. The ratio of samples＇ diameters were more even compared the TiO2 nanofibers prepared by using Ti（OC4Hg）4. The mehtylene blue solution, which concentration was 4 mg/L, was decomposed 72% by the samples with better photocatalytic efficiency after 90 minutes of UV irradiation.