论文部分内容阅读
以聚乙烯吡咯烷酮(PVP)为络合剂,与钛酸四正丁酯[Ti(C4H9O)4]和醋酸锰(Mn(CH3COO)2.4H2O)反应制得前驱体溶液,用静电纺丝法制备PVP/TiO2/Mn2O3纳米复合纤维,在马弗炉中经过煅烧处理过程,获得了TiO2/Mn2O3纳米纤维。采用扫描电镜(SEM)、热分析仪(TG-DTA)、X射线衍射仪(XRD)以及紫外-可见分光光度计对纤维的形貌、物相变化、组分和光吸收性能进行了表征。结果表明:TiO2/Mn2O3纳米纤维的直径较小,主要分布在100nm以下,经500℃高温煅烧即可得到TiO2/Mn2O3复合纳米纤维;并且Mn2O3的引入,有效地使TiO2的光响应范围由紫外光区拓展到了可见光区。
The precursor solution was obtained by reacting polyvinylpyrrolidone (PVP) as complexing agent with tetra n-butyl titanate [Ti (C4H9O) 4] and manganese acetate (Mn (CH3COO) 2.4H2O) by electrospinning PVP / TiO2 / Mn2O3 nanocomposite fibers were calcined in a muffle furnace to obtain TiO2 / Mn2O3 nanofibers. The morphology, phase change, composition and optical absorption properties of the fibers were characterized by SEM, TG-DTA, XRD and UV-Vis spectrophotometer. The results show that the diameter of TiO2 / Mn2O3 nanofibers is small and mainly distributed below 100nm. After being calcined at 500 ℃, the TiO2 / Mn2O3 composite nanofibers can be obtained. The introduction of Mn2O3 effectively makes the photo-response range of TiO2 from UV District expanded to the visible area.