Stability study of ZnO nanoparticles in aqueous solutions of carboxylate anions
| Autor: | Denis Kuznetsov, Anna Yurievna Godymchuk, Elizaveta Karepina, Natalia I. Kosova, Galina V. Lyamina, Elena Yunda |
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| Přispěvatelé: | Томский государственный университет Химический факультет Научные подразделения ХФ |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
водные растворы
Materials science Inorganic chemistry дисперсия наночастиц карбоксильные группы chemistry.chemical_element Nanoparticle Bioengineering Zinc Suspension (chemistry) Electrokinetic phenomena chemistry.chemical_compound Adsorption General Materials Science Carboxylate Aqueous solution наночастицы оксид цинка General Chemistry Condensed Matter Physics Atomic and Molecular Physics and Optics chemistry Modeling and Simulation кислотно-основные свойства поверхности агрегация Dispersion (chemistry) |
| Zdroj: | Journal of Nanoparticle Research. 2015. Vol. 17, № 3, Art. 123. P. (1-8) |
| Popis: | The paper is devoted to the use of carboxylic acids and salts for the elaboration of stable suspensions of ZnO engineered nanoparticles (40 and 200 nm) in physiological media at pH 6–8. It was shown that the aggregation degree of ZnO-200 particles increases with the growth of carboxylic anion activity, e.g., at pH 7 in the row «Acetate−–Citrate3−–Oxalate2−» the average size of ZnO-200 particles in suspensions amounts to «169–523–770» nm, zeta potential–«35.9–−19.9–+5.42 mV», respectively. The aggregation degree of ZnO-40 particles increases in the row «Citrate3−–Acetate−–Oxalate2−», at pH 7, the average size of ZnO-40 particles in suspension amounts to «50–121–430» nm, zeta potential–«−28.3–−14.5–+2.3» mV, respectively. pH-impact was found to be size-dependent: there was a significantly less effect of pH on adsorption, dispersion, and electrokinetic properties of ZnO-40 particles when compared to ZnO-200 particles. The main reason for the difference between micro- and nanosized particles behavior is a change of the ratio of acidic, basic, and neutral Bronsted centers for particles of nanosized scale. |
| Databáze: | OpenAIRE |
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