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


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