Fe-Sm共掺杂改性TiO_2高效光催化剂的制备与表征研究  

Preparation and characterization of Fe-Sm co-doped TiO_2 photocatalyst under UV light

作　　者：刘倩[1] 郑经堂[1] 江波[1] 吴明铂[1] 刘萌萌[1] 

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东青岛266555

出　　处：《现代化工》2012年第12期69-72,共4页Modern Chemical Industry

基　　金：国家自然科学基金项目(20776159);国家自然科学基金资助项目(21176260);中央高校基本科研业务专项资金资助(09CX05009A);山东省自然科学基金资助项目(ZR2009FL028)

摘　　要：采用sol-gel法,使用过渡金属离子Fe和稀土离子Sm共掺杂改性制备纳米TiO2,并以降解甲基橙模拟染料废水为目标,考察其在紫外光下的光催化活性。通过XRD、UV-vis、TEM等手段表征此光催化剂的活性。研究结果表明,共掺杂的光催化活性明显优于单掺杂和不掺杂的光催化活性,尤以煅烧温度500℃下,n(Fe):n(Sm):n(Ti)=0.05:0.1:1时,紫外光下光催化活性最佳。Fe-Sm co-doped titanium photocatalysts are prepared by a sol-gel method and characterized by various techniques including X-ray diffraction （ XRD ）, UV-visible diffuse reflectance spectra （ UV-Vis ） and TEM. The photoeatalytic activity of the Fe-Sm co-doped TiO2 is evaluated through the decomposition of the methyl orange （MO） solution under UV light irradiation. It suggests that the higher photocatalytic activity of Fe-Sm co-doped titanium can be obtained than single-doped titanium under UV light irradiation because of the synergistic effect. The metal ions can make the absorption edge with a substantial red shift, while non-metaflic ions maintaining the absorption in the UV region. The optimum composition of Fe（0. 05 ）Sm（0. 1 ）TiO2 exhibits the highest photoeatalytic activity.

关 键 词：铁 钐 共掺杂 二氧化钛 甲基橙 光催化 

分 类 号：TQ426[化学工程]