Open AccessSynthesis of Spherical Silica Particles with 3-Mercaptopropyl Groups in Their Surface Layer
Author(s) -
Galyna I. Nazarchuk,
Inna Melnyk,
Yu. L. Zub
Publication year - 2012
Publication title -
chemistry journal of moldova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.275
H-Index - 5
eISSN - 2345-1688
pISSN - 1857-1727
DOI - 10.19261/cjm.2012.07(1).28
Subject(s) - thermogravimetry , chemistry , adsorption , aqueous solution , elemental analysis , layer (electronics) , infrared spectroscopy , catalysis , chemical engineering , inorganic chemistry , nuclear chemistry , polymer chemistry , organic chemistry , engineering
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.