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 language | English |
|---|---|
| Journal | Journal of Nanoparticle Research |
| Volume | 17 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Jan 2015 |
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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 journal › Article
}
TY - JOUR
T1 - Stability study of ZnO nanoparticles in aqueous solutions of carboxylate anions
AU - Godymchuk, Anna
AU - Karepina, Elizaveta
AU - Yunda, Elena Nikolaevna
AU - Lyamina, Galina
AU - Kosova, Natalia
AU - Kuznetsov, Denis
PY - 2015/1/1
Y1 - 2015/1/1
N2 - 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.
AB - 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.
KW - Acid–base surface properties
KW - Carboxyl groups
KW - Dispersion of nanoparticles
KW - Nanoparticles
KW - Nanoparticles aggregation
KW - Zinc oxide
UR - http://www.scopus.com/inward/record.url?scp=84924359637&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84924359637&partnerID=8YFLogxK
U2 - 10.1007/s11051-015-2896-6
DO - 10.1007/s11051-015-2896-6
M3 - Article
VL - 17
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
SN - 1388-0764
IS - 3
ER -