Vanadium-based compounds have received much attention in the last years due to their high and selective catalytic activity in major industrial reactions. In this work, the sol gel method was used to synthesize V₂O₅/SiO₂, V₂O₅/TiO₂, and V₂O₅/Al₂O₃ mixed oxides in V₂O₅ nominal proportions of 10%. All samples were submitted to calcination in muffle at 400ºC for 5 h. The materials obtained were characterized by XPS and EPR. The XPS results confirm the EPR observations and indicate the presence of V⁴⁺ and V⁵⁺ in the materials. The characterization results point to the possible use of these materials in catalysis.

sol gel, vanadia, mixed oxides, characterization.