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Ultima descărcare din IBN: 2023-10-24 23:51 |
SM ISO690:2012 NAZARCIUC, G., MELNIC, I., ZUB, Iurie. Synthesis of spherical silica particles with 3-mercaptopropyl groups in their surface layer
. In: Chemistry Journal of Moldova, 2012, nr. 1(7), pp. 157-161. ISSN 1857-1727. |
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Chemistry Journal of Moldova | ||||||
Numărul 1(7) / 2012 / ISSN 1857-1727 /ISSNe 2345-1688 | ||||||
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Pag. 157-161 | ||||||
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Rezumat | ||||||
Spherical silica particles were synthesized by modified Stöber method using tetraethoxysilane and 3-
mercaptopropyltrimethoxysilane (MPTMS). It was shown that their size (500-760 nm) depends on the nature of the
catalyst used in the prehydrolysis of MPTMS (at constant alkoxysilanes ratio). Elemental analysis, thermogravimetry
and IR spectroscopy data indicate the presence of thiol groups (2.8 mmol/g) in the surface layer. It was established that
obtained nanospherical silica particles can adsorb Ag(I) ions from their acidified aqueous solutions.
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Cuvinte-cheie silica spheres, modified Stöber method, 3-mercaptopropyl groups |
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