TiO_2/电气石复合纤维的光催化性能研究

Research on Photocatalytic Performance of TiO_2/Tourmaline Compound Fiber

以钛酸四丁酯为钛源，纳米电气石粉体为原料，采用静电纺丝技术在500℃下获得TiO2／电气石复合纤维。利用同步热分析仪（DSC＆TG）、X射线粉晶衍射仪（XRD）、高分辨率透射电镜（HRTEM）、扫描电子显微镜（SEM）、能量散射光谱仪（EDS）、以及比表面积（BET）测试法对复合纤维的热失重、物相行为、显微形貌、成分组成和比表面积进行表征，并研究了TiO2／电气石复合纤维对亚基蓝溶液的光降解性能。结果表明：TiO2／电气石纤维直径为200～400nm，并且含有一定量的珠粒，增加了纤维的比表面积。在室温下较纯TiO２纤维能够提高11％亚甲基蓝的降解量，是一种性能优良的光催化材料。

TiO2Tourmaline composite fibers were prepared by electrospinning method, using tetrabutyl titanate and tourmaline powder as raw material. Thermal weight loss, phase, microscopic morphology and specific surface area of composite fibers were investigated by DSC＆TG, XRD, HRTEM, SEM, EDS and BET. Photocatalysts properties of composite fibers were studied by the methyl orange photodegradation experiments. The results indicate that composite fibres are 200 nm to 400 nm in diameter with tourmaline particles, which increase the specific surface area of fibers. TiO2/tourmaline fibers is a kind of very good photocatalytie materials with the degradation rate increasing 11% compared with the pure TiO2 fibers.