NDLI: Aggregation kinetics of CeO$_{2}$ nanoparticles in KCl and CaCl$_{2}$ solutions: measurements and modeling

Content Provider	Springer Nature Link
Author	Li, Kungang Zhang, Wen Huang, Ying Chen, Yongsheng
Copyright Year	2011
Abstract	To characterize the environmental transport and health risks of CeO$_{2}$ nanoparticles (NPs), it is important to understand their aggregation behavior. This study investigates the aggregation kinetics of CeO$_{2}$ NPs in KCl and CaCl$_{2}$ solutions using time-resolved dynamic light scattering (TR-DLS). The initial hydrodynamic radius of CeO$_{2}$ NPs measured by DLS was approximately 95 nm. Attachment efficiencies were derived both from aggregation data and predictions based on the Derjaguin–Landau–Verwey–Overbeek (DLVO) theory. The deviations of the DLVO predictions were corrected by employing the extended DLVO (EDLVO) theory. The critical coagulation concentration (CCC) of CeO$_{2}$ NPs at pH = 5.6 is approximately 34 mM for KCl and 9.5 mM for CaCl$_{2}$. Furthermore, based on the EDLVO theory and the von Smoluchowski’s population balance equation, a model accounting for diffusion-limited aggregation (DLA) kinetics was established. For the reaction-limited aggregation (RLA) kinetics, a model that takes fractal geometry into account was established. The models fitted the experimental data well and proved to be useful for predicting the aggregation kinetics of CeO$_{2}$ NPs.
Starting Page	6483
Ending Page	6491
Page Count	9
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	13
Issue Number	12
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-08-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aggregation Kinetics CeO$_{2}$ Nanoparticle DLVO EDLVO Modeling and simulation Characterization and Evaluation of Materials Inorganic Chemistry Nanotechnology Optics, Optoelectronics, Plasmonics and Optical Devices Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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