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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (6): 657-661. 上一篇    下一篇

研究论文

B离子掺杂TiO2催化剂(TiO2－xBx)光催化活性的研究

龙绘锦1,4, 孟庆巨3, 元晶1, 杨文胜4, 曹亚安*,1,2   

  1. (1南开大学物理学院 天津 300071)
    (2南开大学泰达学院应用物理学院 天津 300457)
    (3吉林大学电子科学与工程学院 长春 130023)
    (4吉林大学化学学院 长春 130023)
  • 投稿日期:2007-05-09 修回日期:2007-10-25 发布日期:2008-03-28
  • 通讯作者: 曹亚安

Study on Photocatalytic Activity of Boron Doped TiO2 Catalyst (TiO2－xBx)

LONG Hui-Jin1,4; MENG Qing-Ju3; YUAN Jing1; YANG Wen-Sheng4; CAO Ya-An*,1,2   

  1. (1 College of Physics, Nankai University, Tianjin 300071)
    (2 Teda College of Applied Physics, Nankai University, Tianjin 300457)
    (3 College of Electronic Science and Engineering, Jilin University, Changchun 130023)
    (4 College of Chemistry, Jilin University, Changchun 130023)
  • Received:2007-05-09 Revised:2007-10-25 Published:2008-03-28
  • Contact: CAO Ya-An

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采用溶胶-凝胶法制备出纳米TiO2和TiO2－xBx催化剂. 光催化实验证明, TiO2－xBx催化剂的紫外、可见光催化活性均高于TiO2. XRD, XPS和Raman结果表明, B离子是以取代式掺杂占据了TiO2的O2－的晶格位置. UV-Vis和PL谱的结果表明, B离子的2p轨道与O的2p轨道形成混合价带, 产生可见光响应, B离子的掺入有效地阻止了光生载流子的复合, 促进了其分离, 是TiO2－xBx催化剂紫外、可见光催化活性提高的主要原因.

关键词: 溶胶-凝胶法, 硼离子掺杂, TiO2－xBx催化剂, 光催化活性

Samples of pure TiO2 and TiO2－xBx were obtained with Ti(OC4H9)4 by sol-gel methods. Compared with the pure TiO2, the samples of TiO2－xBx exhibited higher photocatalytic activity under both ultraviolet and visible light irradiation. The reasons were discussed, based on the characterization with XRD, Raman, XPS, UV-Vis and PL spectra. The lattice O is substituted by B, and the orbital of B2p is mixed with O2p orbitals, which is responsible for the band gap narrowing. The raise of the photocatalytic activity is chiefly because B doping enhanced the absorption of visible light, and promoted the separation of photogenerated carriers.

Key words: sol-gel method, B doping, TiO2－xBx photocatalyst, photocatalytic activity