Sn掺杂TiO_2/ACF复合材料的制备、表征及光催化性能

Preparation and characterization of Sn doped TiO_2/ACF photocatalytic composite material

以Ti(OC4H9)4为前体,SnCl_4为Sn源,采用胶溶-回流法制备了Sn掺杂的TiO_2,利用浸渍提拉法将其负载到活性炭纤维(ACF)表面,并运用SEM、XRD、XPS、DRS等手段对TiO_2/ACF复合材料进行表征,考察了复合材料光催化降解气相甲醛的性能。研究结果表明,Sn元素掺入TiO_2晶格中,有利于抑制TiO_2晶粒的生长,促进TiO_2由锐钛矿型向金红石型的转化,光吸收范围发生一定程度红移;HNO_3的用量为0.015mol、掺锡量为6%、负载两层的TiO_2/ACF-50复合材料在紫外光照射下对甲醛的去除率复合材料可达85.2%,而在可见光下仅为65.3%。

Sn/TiO2 was prepared with Ti（OC4H9）4 and SnCl4 by peptization-refluxing method.TiO2 was loaded to the surface of ACF by the use of dip-coating method.TiO2/ACF was characterized by Scanning Electron Microscopy,X-ray Diffraction,X-ray Photoelectron Spectroscopy and UV-VISDiffuse Reflectance Spectroscopy,and the degradation of CH2 O was investigated. When Sn was incorporated into TiO2,the growth of TiO2 grains was inhibited and the conversion of TiO2 was promoted from anatase to rutile. The range of light absorbed by TiO2 was redshift. When 0.015 mol HNO3 were used and 6% Sn were doped content,the removal rate of CH2O was 85.2 percent by two layer TiO2/ACF-50 under UV irradiation,while that of only 65.3 percent was obtained under the visible light.