TiO_2纳米丝阵列的电泳沉积及光催化性能

Electrophoretic Deposition and Photocatalytic Activity of TiO_2 Nanowire Arrays

以多孔氧化铝为模板,采用电泳沉积技术,利用胶体粒子的带电性,引入电场驱动力,组装高度有序、高填充率的TiO2纳米丝阵列.分别通过扫描电镜、透射电镜、X射线衍射分析仪等对其进行表征,结果表明,所组装的TiO2纳米丝为锐钛矿相,纳米丝是连续、致密、相互平行的.对甲基橙溶液的光催化降解实验表明,在相同条件下,与TiO2纳米膜相比,TiO2纳米丝阵列具有较好的光催化性能.

Ordered TiO2 nanowire arrays with a high filling ratiohave been successfully fabricated inside the nanochannels of a porous anodic alumina membrane by electrophoretic deposition, in which an applied electric driving force induces electrophoretic motion of nanoclusters in the sol. The TiO2 nanowire arrays were characterized using scanning electron microscope （SEM）, transmission electron microscope （TEM）, selected area electron diffraction （SAED） and X-ray diffraction （XRD）. The results indicated that the continuous and dense TiO2 nanowires were of anatase polycrystalline structure. The photocatalytic activity of TiO2 nanowire arrays measured by degradation of methyl orange in water is higher, compared with that of TiO2 film.