Stability study of ZnO nanoparticles in aqueous solutions of carboxylate anions

Anna Godymchuk, Elizaveta Karepina, Elena Nikolaevna Yunda, Galina Lyamina, Natalia Kosova, Denis Kuznetsov

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
JournalJournal of Nanoparticle Research
Volume17
Issue number3
DOIs
Publication statusPublished - 1 Jan 2015

Fingerprint

carboxylates
Nanoparticles
Anions
Suspensions
Negative ions
Agglomeration
anions
aqueous solutions
nanoparticles
Carboxylic acids
Salts
Carboxylic Acids
Adsorption
Aggregation
Zinc Oxide
electrokinetics
carboxylic acids
Salt
salts
adsorption

Keywords

  • Acid–base surface properties
  • Carboxyl groups
  • Dispersion of nanoparticles
  • Nanoparticles
  • Nanoparticles aggregation
  • Zinc oxide

ASJC Scopus subject areas

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Stability study of ZnO nanoparticles in aqueous solutions of carboxylate anions. / Godymchuk, Anna; Karepina, Elizaveta; Yunda, Elena Nikolaevna; Lyamina, Galina; Kosova, Natalia; Kuznetsov, Denis.

In: Journal of Nanoparticle Research, Vol. 17, No. 3, 01.01.2015.

Research output: Contribution to journalArticle

Godymchuk, Anna ; Karepina, Elizaveta ; Yunda, Elena Nikolaevna ; Lyamina, Galina ; Kosova, Natalia ; Kuznetsov, Denis. / Stability study of ZnO nanoparticles in aqueous solutions of carboxylate anions. In: Journal of Nanoparticle Research. 2015 ; Vol. 17, No. 3.
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