Synthesis of spherical silica particles with 3-mercaptopropyl groups in their surface layer

Nazarciuc G.; Melnic I.; Zub Iurie

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2023-10-24 23:51

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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

Synthesis of spherical silica particles with 3-mercaptopropyl groups in their surface layer

Pag. 157-161

Nazarciuc G., Melnic I., Zub Iurie

Disponibil în IBN: 14 decembrie 2013

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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.

Cuvinte-cheie
silica spheres, modified Stöber method, 3-mercaptopropyl groups

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