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以聚乙烯吡咯烷酮(PVP)溶胶/钛酸四正丁酯和PVP溶胶/银颗粒为前驱体,以共轴静电纺丝法制备了银填充的TiO2中空纳米纤维.将双组分纤维在200℃下热处理去除乙醇与表面吸附水后,继而在空气气氛中焙烧至600℃,可以得到在内表面上沉积银颗粒的TiO2纳米管,银颗粒的直径为5-40nm,TiO2纳米管的外径150-300nm,管臂厚10-20nm.用红外吸收光谱(IR)、X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等测试手段对超细纤维进行了表征.中空纤维的直径和管壁可以通过改变电纺参数来调节.与Ag-TiO2纳米纤维、TiO2纳米中空纤维、TiO2纳米纤维及TiO2纳米粉体相比较,Ag颗粒填充的TiO2纳米中空纤维在光分解亚甲基蓝上表现出了更好的光催化性能.
Silver-filled TiO2 hollow nanofibers were prepared by coaxial electrospinning using polyvinylpyrrolidone (PVP) sol / tetra-n-butyl titanate and PVP sol / silver as precursors. The bicomponent fibers were extruded at 200 ℃ After the heat treatment to remove ethanol and the surface of the adsorbed water, and then roasted in an air atmosphere to 600 ℃, can be obtained on the inner surface of the deposition of silver particles of titanium dioxide nanotubes, silver particles having a diameter of 5-40nm, the outer diameter of the nanotubes 150 -300nm, and the thickness of the tube arm is 10-20nm. The ultrafine fibers were characterized by IR, XRD, SEM and TEM. Hollow Compared with Ag-TiO2 nanofibers, TiO2 nanofibers, TiO2 nanofibers and TiO2 nanopowders, the diameter and wall of the fibers can be adjusted by changing the electrospinning parameters. Showed a better photocatalytic performance.