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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。
Electrospinning was used to prepare flexible TiO2 nanofibers with titanium sulfate, polyvinylpyrrolidone, DMF and water as raw materials. The nanofibers were characterized by XRD, SEM, TEM and TG-DTA. The results show that the resulting product is polycrystalline flexible TiO2 nanofibers with an average diameter of about 100nm and a length of> 300μm. With methyl orange, rhodamine B and phenol as degradation products, the effect of calcination temperature on photocatalytic activity was investigated. The flexible TiO2 nanofibers could achieve high degradation rate of these three degradation products. The formation mechanism of flexible TiO2 nanofibers was discussed.