溶胶凝胶法制备掺杂纳米TiO_2粉末及其光催化性能  

Doped nano titania powder prepared by sol-gel technique and its photocatalytic activity

作　　者：周志超[1,2] 段学臣[1,2] 朱奕漪[1,2] 段文杰[1,2] 刘杨林[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2013年第3期434-440,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：国家科技部创新基金(11C26214302851);长沙市科技计划项目(K0902131-11)

摘　　要：采用溶胶–凝胶法制备掺锌纳米TiO2粉末、掺氮纳米TiO2粉末以及锌氮共掺纳米TiO2粉末(掺杂量均为1%)。采用X射线衍射仪(XRD)、场发射扫描电镜(FESEM)、透射电镜(TEM)、傅立叶红外光谱测试仪及紫外可见–分光光度计等分析粉末的物相、形貌、光学性能及光催化性能。结果表明:在纳米TiO2粉末中掺锌或氮,既不会改变粉末的晶体结构,也不会产生新相。与纯TiO2粉末相比,掺锌或掺氮后粉末光催化性能更好。但同时掺入锌和氮,反而会降低TiO2粉末的光催化性。在热处理温度为500℃条件下制备的掺氮TiO2粉末光催化活性最高。Zn,N-doped and Zn-N-codoped nano TiO2particles were prepared by sol-gel process.The phase composition,surface morphologies,optical properties and photocatalytic activity of the particles were characterized by X-ray diffraction,field emission scanning electron microscope,transmission electron miscroscopy,Fourier transform infrared spectroscopy tester and UV-visible-spectrophotometer,respectively.The results show that,nano-TiO2doped with zinc or nitrogen neither change the crystal structure nor generate a new phase.Both N-doped TiO2and Zn-doped TiO2 powders show higher photocatalytic activity compare to that of pure TiO2 particles.However,it is the opposite for the Zn-N codoped TiO2powers.When the doping amount is 1% and the heat treatment temperature is 500 ℃,N-doped nano TiO2 particles exhibit the best photocatalytic activity.

关 键 词：溶胶–凝胶法 掺氮 掺锌 锌氮共掺 光催化 热处理 

分 类 号：O614.411[理学—无机化学]