Study of MgO Transformation into MgF2 in the Presence of CF2Cl2
Alkaline-earth metal oxide aerogels prepared by sol–gel method followed by autoclave drying are nanocrystalline mesoporous materials with high reactivity. The reaction of MgO aerogels with CF2Cl2 was shown to takes place after a long induction period. It was found that addition of vanadium had a promoting effect on this reaction accelerating the formation of the active sites on the surface of the nanoparticles. A good correlation was observed between the rate of the CF2Cl2 destructive sorption and the concentration of weak electron-acceptor sites characterized by EPR technique using perylene as a spin probe.