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.
出处
《粉末冶金材料科学与工程》
EI
北大核心
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)
关键词
溶胶–凝胶法
掺氮
掺锌
锌氮共掺
光催化
热处理
sol-gel
nitrogen-doped
znic-doped
nitrogen-znic-codoped
photocatalysis
heat treatment activity
