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N掺杂纳米TiO2的制备及其光催化性能

宋巍巍,薛永强,苏黎宁,鞠洪斌   

  1. 太原理工大学应用化学系,山西 太原 030024
  • 出版日期:2012-05-05 发布日期:2012-05-05

Preparation and photocatalytic activity of nano-nitrogen-doped TiO2

SONG Weiwei,XUE Yongqiang,SU Lining,JU Hongbin   

  1. Department of Applied Chemistry,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China
  • Online:2012-05-05 Published:2012-05-05

摘要: 以钛酸四丁酯和乙醇为原料,尿素为氮源,室温下采用溶胶-凝胶法制备了氮掺杂的纳米TiO2粉末。采用XRD、TEM、UV-Vis DRS对样品进行了表征。结果表明:N掺杂使纳米TiO2的光谱响应范围拓展到可见光区。较佳制备条件是:n(钛酸四丁酯)∶n(尿素)为1∶3,400 ℃下煅烧3.5 h,所得样品为锐钛矿晶型,平均粒径为13 nm。光降解甲基橙实验中,溶液pH值为4.0时,降解率最大,反应3 h降解率可达70.5%。

关键词: 纳米二氧化钛, 氮掺杂, 可见光, 光催化

Abstract: Nano-N-doped TiO2 photocatalyst was prepared by Sol-Gel method at room temperature,using tetrabutyl titanate as raw material and urea as N source. The N/TiO2 photocatalyst was characterized by X-ray diffraction(XRD),TEM,UV-Vis DRS. The results show that the N doped extended the spectral response range of nano-TiO2 particles to the visible light region. The better process parameters are that:n(n-butyl titanate) ∶n(urea) of 1∶3 and calcinate time of 3.5 h at 400 ℃,under which nano-N/TiO2 is anatase phase and its average particle diameter is 13 nm. When the photodegradation of methyl orange,the optimal pH is 4.0,degradation rate of methyl orange can reach 70.5% after 3 h。

Key words: nano-titanium dioxide, nitrogen-dope, visible light, photocatalysis

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