Abstract
The photocatalytic activity of the mixtures of TiO2 with the rare earth oxide La was investigated. The study on the effect of the rare earth oxide content, calcinating temperature and calcinating time on the performance of the mixture revealed that sample treated under higher temperature and longer time had higher photoactivity than pure TiO2. The experimental results of polycrystalline X-ray diffraction showed that the extent of the lattice expansion varied with the variation of calcinating temperature of time. It is suggested that this might be due to the variation of La content diffused into the TiO2 lattice. The La in the lattice may inhibit the recombination of photogenerated electron-hole pairs and thus enhance the photoactivity.
This is a preview of subscription content, log in via an institution to check access.
References
Bunsho, O., Yoshimasa, O., Seiichi, N., 1997. Photocatalytic activity of amorphous-anatase mixture of titanium(IV) oxide particles suspended in aqueous solutions.Journal of Physical Chemistry B.,101:3746–3755.
Choi, W., Termin, A., Hoffmann, M. R., 1994. The role of metal ion dopants in quantum-size TiO2: Correlation between photoreactivity and charge carrier recombination dynamics.Journal of Physical Chemistry,98: 13669–13675.
Jimmy, C. Y., Jun, L., Raymund, W. M., 1998. Ti1−x ZrxO2 solid solutions for the photocatalytic degradation of acetone in air.Journal of Physical Chemistry B.,102:5094–5099.
Jun, L., Jimmy, C. Y., 1998. An investigation on photocatalytic activities of mixed TiO2-rare earth oxides for the oxidation of acetone in air.Journal of Photochemistry and photobiology A: Chemistry,116:63–67.
Kakuta, N., Park, K. H., **layson, M. F. et al., 1985. Photoassisted hydrogen production using visible light and coprecipitated ZnS·CdS without a noble metal.J of Physical Chemistry,89:732–738.
Keiichi, T., Mario, F. V. C., Teruaki, H., 1991. Effect of crystallinity of TiO2 on its photocatalytic action.Chemical Physics Letters,94:73–76.
Khalil, L. B., Mourad, W. E., Rophael, M. W., 1998. Photocatalytic reduction of environmental pollutant Cr (VI) over some semiconductors under UV/visible light illumination.Applied Catalysis B: Environmental,17:267–274.
Ollis, D. F., Al-Ekabi, H., 1993. Eds. Photocatalytic purification and treatment of water and air.Elsevier, Amsterdam, 17–20.
Papp, J., Soled, S., Dwight, K., 1994. Surface acidity and photocatalytic activity of TiO2, WO3/TiO2 and MoO3/TiO2 photocatalysts.Chemistry of Material,6: 496–503.
Yue, L. H., Shui, M., Xu, Z. D., 1999. Study on the correlation between crystal structure of titanium dioxide and its photocatalytic activity.Acta Chimica Sinica,57:10–16 (In Chinese, with English abstract).
Yue, L. H., Xu, Z. D., 1998. Surface modification of titanium dioxide.Chemical Bulletin,9:28–35 (In Chinese, with English abstract).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lin-hai, Y., Miao, S., Wang-liang, Z. et al. Photocatalytic activity of lanthanum do** TiO2. J. Zhejiang Univ.-Sci. 2, 271–274 (2001). https://doi.org/10.1631/BF02839458
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1631/BF02839458