The template synthesis of mesoporous silicas with the thiourea functional group |
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| Authors: | E. I. Gona Yu. L. Zub N. A. Yaroshenko Ya. Goworek |
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| Affiliation: | (1) Institute of Surface Chemistry, National Academy of Sciences of Ukraine, Kiev, Ukraine;(2) Institute of Sorption and Endoecology, National Academy of Sciences of Ukraine, Kiev, Ukraine;(3) Faculty of Chemistry, Maria Curie-Sklodowska University, Lublin, Poland |
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| Abstract: | Mono- and bifunctional mesoporous silicas containing the thiourea group ≡Si(CH2)3NHC(S)NHC2H5 or thiourea and various nitrogen-containing groups [≡Si(CH2)3NH2, ≡Si(CH2)3NH(CH2)2NH2, or {≡Si(CH2)3}2NH], respectively, in the surface layer were prepared by template syntheses with cetylpyridinium chloride as a template. The synthesized samples had well-developed porous structures (S sp = 750–1150 m2/g, V c = 0.51–0.72 cm3/g, and d = 2.4–3.5 nm) and high functional group contents (1.0–2.0 mmol/g). Hydrothermal treatment of the mesophases in a mother liquor at 80°C (24 h) improved the structure-adsorption characteristics of the functionalized mesoporous silicas. |
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