静电纺丝制备二氧化钛纳米纤维及其物性研究

Preparation and properties of TiO_2 nanofibers by electrospinning

以钛酸四丁酯(TBT)、无水乙醇和聚乙烯吡咯烷酮(PVP)为原料,配置适宜纺丝的前驱体溶液。该溶液在合适的工作条件下以静电纺丝方法纺丝得到前驱体纤维,再经真空高温退火得到TiO_2纳米纤维;对得到的纳米纤维进行物性测试,测试退火后样品的XRD图像发现样品在550℃的温度退火下形成了锐钛矿相的TiO_2,测试比较退火前后样品的扫描电镜(SEM)图像发现样品在退火前后均是网格状纳米纤维结构,测试退火前后样品的红外吸收光谱发现样品经退火后形成了Ti-O化学键,测试TiO_2纳米纤维与TiO_2粉末的发射光谱比较其不同之处。

The tetrabutyltitannate,ethanol and polyvinylpyrrolidone were used to prepare the appropriate precursor solution. The precursor nanofibers were fabricated in suitable conditions byelectrospinning, and the TiO2 nanofibers were obtained after annealing. The annealed samples were studied by X-ray Diffraction,suggesting that, anatase TiO2 is formed at 550℃. The latticed nanofibers were found before and after annealing, and the synthesis of Ti-O chemical bond was found by infrared absorption spectrum. The differences of fluorescence spectrum between TiO2 nanofibers and TiO2 ponder were finally compared.