Elective catalytic reduction of NO with propane on V2O5/SiO2, V2O5/TiO2, and V2O5/Al2O3 catalysts obtained through the sol-gel method - doi: 10.4025/actascitechnol.v35i1.11888. Acta Sci. Technol. 2012;35(1):139-145. doi:10.4025/actascitechnol.v35i1.11888