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Surface Charge of Vitreous Silica and Silicate Glasses in Aqueous Electrolyte Solutions
Author(s) -
HORN J. M.,
ONODA G. Y.
Publication year - 1978
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1978.tb16132.x
Subject(s) - aluminosilicate , surface charge , adsorption , point of zero charge , electrolyte , inorganic chemistry , aqueous solution , zeta potential , ion , silicate , materials science , sodium silicate , streaming current , chemistry , chemical engineering , electrokinetic phenomena , composite material , organic chemistry , electrode , nanoparticle , engineering , nanotechnology , catalysis
Surface charge variations as a function of solution ion concentration were investigated for vitreous silica‐aqueous electrolyte systems. Zero point of charge determinations for soda‐aluminosilicate and soda‐lime‐silicate glasses revealed little difference from the values for vitreous silica. Unlike sodium and barium ions, aluminum ions reverse the sign of the zeta potential for vitreous silica, indicating chemical interaction with the surface. The degree of their interaction depends on the hydration state of the surface. The positive surface charge created by aluminum ion adsorption can be reversed by adsorption of citrate ions from solution to surface aluminosilicate sites.