Preparation of lithium silicate foams using HSi(OC2H5)3 and their NOx adsorption-desorption behavior

Abstract

Silicate foams have been prepared by reaction of HSi(OC₂H₅)₃ with aqueous lithium silicate solution. The gelation occurred immediately and the hydrogen gas during the gelation produced macro-voids to provide silicate foams. The surface of the silicate foams showed the solid basic property of H₀ = 9 and adsorbed the acidic gases of NO and NO₂. FT-IR spectrum showed an absorption peak at 1385 cm^-1 assigned to deformation vibration of nitrate ion, NO^3-.