Influence of neodymium ions on photocatalytic activity of TiO2 synthesized by sol-gel and precipitation methods

Influence of neodymium ions on photocatalytic activity of TiO2 synthesized by sol-gel and precipitation methods

Author Hewer, T. L. R. Google Scholar
Souza, E. C. C. Google Scholar
Martins, T. S. Autor UNIFESP Google Scholar
Muccillo, E. N. S. Google Scholar
Freire, R. S. Google Scholar
Institution Universidade de São Paulo (USP)
IPEN
Universidade Federal de São Paulo (UNIFESP)
Abstract Titanium dioxide with and without the addition of neodymium ions was prepared using sol-gel and precipitation methods. the resulting catalysts were characterized by thermal analysis, X-ray diffraction and BET specific surface area. Neodymium addition exerted a remarkable influence on the phase transition temperature and the surface properties of the TiO2 matrix. TiO2 samples synthesized by precipitation exhibit an exothermic event related from the amorphous to anatase phase transition at 510 degrees C, whereas in Nd-doped TiO2 this transition occurred at 527 degrees C. A similar effect was observed in samples obtained using sol-gel method. the photocatalytic reactivity of the catalysts was evaluated by photodegradation of Remazol Black B (RB) under ultraviolet irradiation. Nd-doped TiO2 showed enhanced photodegradation ability compared to undoped TiO2 samples, independent of the method of synthesis. in samples obtained by sol-gel, RB decoloration was enhanced by 16% for TiO2 doped with 0.5% neodymium ions. (C) 2010 Elsevier B.V. All rights reserved.
Keywords Heterogeneous photocatalysis
TiO2 nanoparticle
Composite
Doping
Language English
Date 2011-02-14
Published in Journal of Molecular Catalysis A-chemical. Amsterdam: Elsevier B.V., v. 336, n. 1-2, p. 58-63, 2011.
ISSN 1381-1169 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 58-63
Origin http://dx.doi.org/10.1016/j.molcata.2010.12.010
Access rights Closed access
Type Article
Web of Science ID WOS:000288481000008
URI http://repositorio.unifesp.br/handle/11600/33466

Show full item record




File

File Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Search


Browse

Statistics

My Account