TY - JOUR
T1 - Behavior of ZnO nanoparticles in glycine solution
T2 - pH and size effect on aggregation and adsorption
AU - Godymchuk, Anna
AU - Papina, Iuliia
AU - Karepina, Elizaveta
AU - Kuznetsov, Denis
PY - 2020/11
Y1 - 2020/11
N2 - Growing interest in nanoparticles' (NPs) behavior in the environment needs deeper purport of interactions between NPs and amino acids. In this work, we evaluated particle size distribution, aggregation degree, zeta potential, adsorption efficiency, and specific adsorption of three ZnO NPs with average sizes 30, 135, and 210 nm in 1 M glycine solution at different pH. The interaction of ZnO NPs and glycine is stimulated by the pH growth from 4 to 8 (an increase of glycine adsorption and decrease of particle aggregation), whereas at рН > 8 colloidal and adsorption properties are weakly affected by pH change. The addition of glycine to water promotes the aggregation of 30 nm NPs, while the aggregation of bigger NPs is weakened. For smaller particles aggregation and adsorption efficiency are higher, and specific adsorption is lower, meanwhile, the size effect is stronger in aggressive medium: alkaline – in water, and acid – in glycine.
AB - Growing interest in nanoparticles' (NPs) behavior in the environment needs deeper purport of interactions between NPs and amino acids. In this work, we evaluated particle size distribution, aggregation degree, zeta potential, adsorption efficiency, and specific adsorption of three ZnO NPs with average sizes 30, 135, and 210 nm in 1 M glycine solution at different pH. The interaction of ZnO NPs and glycine is stimulated by the pH growth from 4 to 8 (an increase of glycine adsorption and decrease of particle aggregation), whereas at рН > 8 colloidal and adsorption properties are weakly affected by pH change. The addition of glycine to water promotes the aggregation of 30 nm NPs, while the aggregation of bigger NPs is weakened. For smaller particles aggregation and adsorption efficiency are higher, and specific adsorption is lower, meanwhile, the size effect is stronger in aggressive medium: alkaline – in water, and acid – in glycine.
KW - Adsorption
KW - Aggregation
KW - Amino acid
KW - Colloidal stability
KW - Glycine
KW - pH
KW - Zeta potential
KW - ZnO nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85091748040&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85091748040&partnerID=8YFLogxK
U2 - 10.1016/j.colcom.2020.100318
DO - 10.1016/j.colcom.2020.100318
M3 - Article
AN - SCOPUS:85091748040
VL - 39
JO - Colloids and Interface Science Communications
JF - Colloids and Interface Science Communications
SN - 2215-0382
M1 - 100318
ER -