Zeta Potential and Degree of the Aggregation of Nanoparticles of the Pyrogenic Silica in the Presence of the Dissolved Metal Chlorides in the Aqueous Medium

• Дата: 2015
• Автори: Andriyko, L.S., Zarko, V.I., Marynin, A.I., Olishevskyi, V.V., Kravchenko, A.A., Demjanenko, Е.M.
• Формат: Стаття
• Мова: English
• Опубліковано: Інститут металофізики ім. Г.В. Курдюмова НАН України 2015
• Назва видання: Наносистеми, наноматеріали, нанотехнології
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/107286
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Zeta Potential and Degree of the Aggregation of Nanoparticles of the Pyrogenic Silica in the Presence of the Dissolved Metal Chlorides in the Aqueous Medium / L.S. Andriyko, V.I. Zarko, A.I. Marynin, V.V. Olishevskyi, A.A. Kravchenko, Е.M. Demjanenko // Наносистеми, наноматеріали, нанотехнології: Зб. наук. пр. — К.: РВВ ІМФ, 2015. — Т. 13, № 3. — С. 389-402. — Бібліогр.: 27 назв. — англ. .

The effects of univalent metals’ chlorides (LiCl, NaCl, KCl) at different concentrations (0.001–0.1 M) on the behaviour of nanosilica (0.5–5 wt.%) in aqueous medium are analysed using photon correlation spectroscopy (particle size distribution—PSD) and electrophoresis (zeta potential, ζ). The shift of dissociation constant (Kα) estimated for fumed silica hydroxyl sites is observed. Such a change in the pKα value is established via quantum-chemical study of the electrolyte–silica surface interaction. The correlation dependence associated with pKα, an effective diameter, and ζ-potential of silica nanoparticles is demonstrated.