Sn掺杂TiO2/ACF复合材料的制备、表征及光催化性能

以Ti(OC₄H₉)₄为前体,SnCl₄为Sn源,采用胶溶-回流法制备了Sn掺杂的TiO₂,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TiO₂/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TiO₂晶格中,有利于抑制TiO₂晶粒的生长,促进TiO₂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;HNO₃的用量为0.015mol、掺锡量为6%、负载两层的TiO₂/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%。

Preparation and characterization of Sn doped TiO2/ACF photocatalytic composite material

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-VIS- Diffuse Reflectance Spectroscopy,and the degradation of CH₂O 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.