V掺杂TiO_2的制备及其可见光催化性能研究  

Preparation and visible-light-driven photocatalytic performance of vanadium-doped titanium dioxide

作　　者：高碧芬[1] 施俊新[1] 袁霞[1] 富好[1] 

机构地区：[1]华侨大学材料科学与工程学院,福建厦门361021

出　　处：《化学工程与装备》2013年第9期1-4,共4页Chemical Engineering & Equipment

基　　金：福建省自然科学基金(No.2012J05024)

摘　　要：本文采用水热法制备V掺杂TiO2(V-TiO2)光催化剂,借助XRD、XPS、UV-Vis DRS等手段对V-TiO2的结构进行表征,并以酸性红染料作为模型污染物,评价V-TiO2在可见光作用下的光催化性能。实验结果表明,V离子进入TiO2晶格并取代Ti4+离子,V离子掺杂在TiO2的导带下方引入了V3d掺杂能级,V-TiO2在可见光区具有显著吸收,且光生载流子的复合受到有效抑制,因此,V掺杂明显提高了TiO2降解酸性红染料的效率。V-doped TiO2 was prepared by a facile hydrothermal method. The structural properties of the catalysts were investigated by means of XRD, UV-Vis DRS, PL, etc. The photocatalytic activities of V-doped TiO2 were evaluated by the degradation of Acid Red 88 under visible light irradiation. The experiment results showed that V ions were successfully incorporated into the crystal lattice of anatase TiO2 and substituted for the lattice Ti4 V-TiO2 had a significant absorption in the visible region and the absorption band of V-TiO2 red-shifted grad ions.ually as the concentration of V increased. The recombination of the photo-generated electron and hole pairs was greatly inhibited, so that the visible-light-driven photocatalytic efficiency of V-Ti2 was significantly enhanced. The catalyst doped with 1% V presented the best activity.

关 键 词：光催化 TIO2 钒掺杂 水热法 

分 类 号：O614.411[理学—无机化学] O643.36[理学—化学]