Selective catalytic reduction of NO by NH3 over aerogels of titania, silica and vanadia

Sol-gel synthesis is a versatile approach in preparing catalytic materials because it offers better control over their textural properties and sample homogeneity in multicomponent systems. Aerogels, materials that are obtained by drying wet gels with supercritical extraction, offer additional advantages such as high specific surface area and thermal stability. We have explored some of these advantages by preparing aerogels of vanadia, titania and silica and evaluating their SCR activities.