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静电纺丝制备TiO2纳米纤维的光催化性能

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Abstract:

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150~250nm,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。

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