Title of article :
Synthesis and textural-structural characterization of magnesia, magnesia–titania and magnesia–zirconia catalysts
Author/Authors :
Aramend??a، نويسنده , , Mar??a A and Bor?u، نويسنده , , Victoriano and Jiménez، نويسنده , , César and Marinas، نويسنده , , Alberto and Marinas، نويسنده , , José M and Nav??o، نويسنده , , José A and Ruiz، نويسنده , , José R. and Urbano، نويسنده , , Francisco J، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
9
From page :
17
To page :
25
Abstract :
Several pure magnesium oxides together with some mixed systems (magnesia–titania and magnesia–zirconia) were synthesised, using the sol–gel technique. Chemical, textural and structural characterisation of the solids was carried out through a wide range of physical techniques. In all the cases, the presence of titanium or zirconium led to an increase in surface area as compared to pure magnesia. X-ray diffraction (XRD) revealed that no mixed phases were observed, but MgO (periclase), TiO2 (anatase) and ZrO2 (tetragonal) phases. As for mixed oxides, surface and bulk composition is quite similar in Mg–Zr system, whereas titanium tends to accumulate in the surface of Mg–Ti solids. The surface of the catalysts appears clearly carbonated as revealed by the XPS and diffuse reflectance infrared (DRIFT) spectra, revealing the basic character of the catalysts prepared.
Keywords :
Magnesia , Magnesia–titania , Structural characterization , Textural characterization , Magnesia–zirconia
Journal title :
Colloids and Surfaces A Physicochemical and Engineering Aspects
Serial Year :
2004
Journal title :
Colloids and Surfaces A Physicochemical and Engineering Aspects
Record number :
1787119
Link To Document :
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