静电纺丝制备柔性TiO2纳米纤维及其光催化性能

Fabrication of Flexible TiO_2 Nanofibres by Electrospinning and Their Photocatalytic Properties

采用静电纺丝技术,以硫酸钛、聚乙烯吡咯烷酮、DMF和水为原料,制备出柔性TiO2纳米纤维。用XRD、SEM、TEM和TG-DTA等分析手段对纳米纤维进行表征。结果表明,所得产物为多晶结构柔性TiO2纳米纤维,平均直径约为100nm,长度>300μm。以甲基橙、罗丹明B和苯酚为降解物,考察了焙烧温度对光催化效果的影响,柔性TiO2纳米纤维对这3种降解物均可达到较高的降解率。对柔性TiO2纳米纤维的形成机制进行了讨论。

Flexible TiO2 nanofibres were fabricated by electrospinning with Ti(SO4)(2), polyvinyl pyrrolidone (PVP), dimethyl formamide(DMF) and deionized water as starting materials. The samples were characterized with XRD, FESEM, TEM and TG-DTA. The results reveal that the obtained TiO2 nanofibres are flexible and polycrystalline structure. The mean diameter of the TiO2 nanofibres is about 100 nm, and the length is greater than 300 mu m. The influence of calcination temperatures on the photocatalytic effect for TiO2 nanofibres was investigated through methyl orange, rhodamine-B and phenol as degradation compounds. The photocatalytic experiments results indicate that flexible TiO2 nanofibres possess high degradation rates for these three degradation compounds. The formation mechanism of the flexible TiO2 nanofibres was also discussed.