en
Scientific article
English

Aggregation and Disaggregation of ZnO Nanoparticles: Influence of pH and Alginate Concentration

Publication date2014
Abstract

The surface charge and average size of ZnO was studied with a function of pH and time based on the interactions between ZnO and alginate. The pHPZC ZnO was the point of reference. At low concentrations of alginate (<0.001 mg/L) the positively charged ZnO aggregates were rapidly adsorbed below the pHPZC. With similar alginate concentrations, at pH=pHPZC, alginate was able to control the suspension behavior of the ZnO and promoted partial disaggregation in small volumes. This was more distinguishable as alginate form a surface coating on the nanoparticles and enhances stability via electrostatic stabilization mechanism which induces the disaggregation behavior in the ZnO nanoparticles and hence, decreases the aggregate size.

Keywords
  • ZnO
  • Alginate
  • PH
  • Zeta potential
  • Hydrodynamic diameter
  • Aggregation
  • Disaggregation
Citation (ISO format)
MOHD OMAR, Fatehah Binti, ABDUL AZIZ, Hamidi, STOLL, Serge. Aggregation and Disaggregation of ZnO Nanoparticles: Influence of pH and Alginate Concentration. In: International journal of chemical and environmental engineering, 2014, vol. 5, p. 172–175.
Main files (1)
Article (Published version)
accessLevelRestricted
Identifiers
  • PID : unige:74453
ISSN of the journal2078-0737
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3downloads

Technical informations

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