Effect of Ti content in the photocatalytic behavior of Fe/TiO2-SiO2 systems
Por:
Choreno, AL, Velez, NP, Perez, IH, Parra, RS, Lozano, MM, Reyes, LG, Paz, RL
Publicada:
1 feb 2013
Categoría:
Physics and Astronomy (miscellaneous)
Resumen:
In this work we report the synthesis of Fe/TiO2-SiO2 systems with
different concentrations of TiO2 in order to determine the influence of
titanium content on the structural, textural, optical properties and
their photocatalytic behavior. The materials were synthesized by the
sol-gel method and their modification was carried out by incipient
impregnation. All samples were characterized by means of X ray
diffraction, N-2 physisorption (BET method), DR-UV-Vis and Raman
spectroscopy. The modifications of the structural and optical properties
are discussed on the basis of long-range order reduction, suggesting the
formation of highly dispersed TiO2 species. On the other hand, it was
observed that the energy of the optical band gap decreases by
introducing Fe. On the basis of these phenomena, the photocatalytic
activity was measured, employing the degradation of orange II azo dye as
a model reaction.
Filiaciones:
UAM A, Dept Basic Sci, Mexico City 02200, DF, Mexico
UAM L, Div Basic Sci & Engn, Lerma 5200, Mexico
UNAM, Ctr Invest Energia, Temixco Morelos 62580, Mexico
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