الفهرس 
Acknowledgements
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Abstract
The present work describes a novel direct preparation method for preparation of mixed metal oxide, perovskite type, supported on two different types of supporting materials. The two supports were namely nonporous spherical silica particles (known as Stöber Silica Particles) and spherical ordered mesoporous material (MCM-41). Thus, two series of 10−30 w% of lanthanumiron oxides, LaFeO3, supported on silica; and 3−30 w% of LaFeO3, supported on MCM-41materials were targeted