Abstract: Development of active destructive sorbents capable of decomposing halocarbons without harming the environment is of substantial practical interest. Particular interesting nanocrystalline mesoporous materials with high reactivity are alkaline-earth metal oxide aerogels prepared by sol–gel method followed by autoclave drying. This method yields samples with high specific surface areas and developed mesoporous structure due to the release of organic solvents under supercritical conditions. It was found that addition of vanadium had a promoting effect on the reaction of nanocrystalline MgO aerogels with halocarbons, accelerating the formation of the active sites on the surface of the nanoparticles. A good correlation was observed between the rate of the halocarbon destructive sorption and the concentration of weak electron-acceptor sites characterized by EPR using perylene as a spin probe. These results clearly demonstrate that weak electronacceptor sites are accumulated on the MgO surface during the induction period of its reaction with CF2Cl2. This process is a rare example where surface active sites are shown to be responsible for a bulk solid-state reaction.

Cite: Shuvarakova E. , Bedilo A.F. , Mishakov I.V. , Vedyagin A.A.
Nanocrystalline MgO and VOx/MgO as destructive sorbents for CF2Cl2
In compilation International Porous and Powder Materials Symposium and Exhibition PPM 2015 : Proceedings. – Uc Adim Printing House., 2015. – C.268-272. – ISBN 9789756590072.

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