Paper Title:
Effect of Co-Doped La3+/Halogen on Visible Light Photocatalytic Activity of TiO2
  Abstract

La3+/halogen (F-, Cl- and Br-) co-doped TiO2 was synthesized by alkoxide hydrolysis method. The prepared La3+/halogen TiO2 photocatalysts with anatase phases and rutile phases were characterized with XRD, EDS, TEM and surface area analytic technology. Methyl orange was used as model pollutants to evaluate its visible light photocatalytic activity. The results showed that the co-doping of La3+ and halogen ions improved the surface area of TiO2. Compared with 450°C and 650°C, La3+/Cl- and La3+/Br- co-doped TiO2 calcined at 550°C exhibited much higher photocatalytic activity. The optimal doping ratio of La3+/F-, La3+/Cl- and La3+/Br- was 0.4, 0.6, and 0.5 ((wt%)/(wt%)), respectively. Moreover, the degradation ratio of methyl orange on La3+/halogen co-doped TiO2 with the optimal ratio were all higher than the maximum degradation ratio on La3+, F-, Cl- and Br- doped TiO2 prepared by the same method.

  Info
Periodical
Advanced Materials Research (Volumes 239-242)
Edited by
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
Pages
1923-1928
DOI
10.4028/www.scientific.net/AMR.239-242.1923
Citation
Q. L. Chen, Y. Wang, C. Y. Zhong, Y. Guo, "Effect of Co-Doped La3+/Halogen on Visible Light Photocatalytic Activity of TiO2", Advanced Materials Research, Vols. 239-242, pp. 1923-1928, 2011
Online since
May 2011
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$32.00
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