无机液相源模板法制备TiO_2纳米线及光催化性能

以无机盐TiOSO4为原料,采用多孔氧化铝模板技术,通过液相的溶胶-电泳法,制备出直径为30～70nm的TiO2纳米线。试验发现,通过对多孔氧化铝模板孔径形貌的设计,可以对纳米线的结构进行调控。由无机盐原料制备出的纳米线与有机盐原料不同,以硫酸氧钛为原料制备的无机溶胶纳米线,纯TiO2就表现出较高的可见光催化性能,这是锐钛矿纳米晶的表面分布着部分未分解结晶的过氧钛酸黄色络合物所致,它可以吸收可见光使TiO2光敏化而具有可见光活性。

Preparation and Visible-light Photocatalytic Properties of Titania Nanowires by Inorganic Salt Liquid Source Template Method

In this paper,inorganic salt TiOSO4 was used as raw material to prepare titania nanowires which diameters are 30 nm to 70 nm. The titania nanowires were prepared by porous anodic alumina （ PAA） template and sol-electrophoresis technique. It is found that the structure of nanowires could be controlled by designing the porous shape of PAA. The nanowires prepared by inorganic materials are different from those prepared by organic materials. Pure titania has shown very high visible-light photocatalytic properties. This is because there are some undecomposed yellow complexes of peroxotitanic acid distributing on the surface of anatase nanocrystals. These complexes can absorb visible-light and make titania photoacti- vated.