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Manganese doped sol-gel materials with catalytic properties

M. CRISAN1, M. RAILEANU1, S. PREDA1, M. ZAHARESCU1,* , A. M. VALEAN2, E. J. POPOVICI2, V. S. TEODORESCU3,3, J. MRAZEK4

Affiliation

  1. Institute of Physical Chemistry “Ilie Murgulescu”, Romanian Academy, 202 Splaiul Independenei P.O. Box 12-194, 060021, Bucharest, Romania
  2. "Raluca Ripan" Institute for Research in Chemistry, 30 Fântânele, 400429 Cluj-Napoca, Romania
  3. National Institute of Materials Physics, PO Box Mg7, 76900, Bucharest, Mgurele, Romania
  4. nstitute of Radio Engineering and Electronics, AS CR Chaberska 57, 182 51 Prague 8, Czech Republic

Abstract

In the present study manganese doped alumina and silica gels and thin films deposited on different substrates (refractory metals, silicon wafers) were obtained by the alkoxide and aqueous routes of the sol-gel method. The characterization of the films was realized by X-ray diffraction (XRD), and spectroelipsometry (SE) methods. The un-supported gels (obtained by the gelation of the solutions used for the film deposition) were characterized by DTA/TG analysis, IR spectroscopy, transmission electron-microscopy and electron diffraction (TEM and SAED) and BET method (adsorption of krypton at temperature of liquid nitrogen) for surface area and pores volume determination. The sol-gel materials were tested as catalysts for the ozone decomposition..

Keywords

Sol-gel method, Alkoxide and aqueous route, Mn2+-doped Al2O3 and SiO2 films, Catalytic applications.

Submitted at: Jan. 31, 2006
Accepted at: March 23, 2006

Citation

M. CRISAN, M. RAILEANU, S. PREDA, M. ZAHARESCU, A. M. VALEAN, E. J. POPOVICI, V. S. TEODORESCU, J. MRAZEK, Manganese doped sol-gel materials with catalytic properties, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 815-819 (2006)