Aminopolycarboxylic acids as a versatile tool to stabilize ceria nanoparticles – a fundamental model experimentally demonstrated

An extremely stable water dispersion of cerium oxide nanoparticles was prepared by colloidal synthesis, using nitrilotriacetic acid (NTA) as a stabilizer. Based on FT-IR measurements, the surface characteristics of NTA-stabilized ceria nanoparticles are clarified and a fundamental stabilization mech...

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Bibliographic Details
Published in:RSC advances 2014, Vol.4 (18), p.9048-9055
Main Authors: Salazar-Sandoval, Eric Johansson, Johansson, Mats K. G., Ahniyaz, Anwar
Format: Article
Language:English
Subjects:
Actinide Ions
Aminocarboxylate Ligands
CEO2
Cerium oxide
Complexation
Dispersions
Fuel-Cell
Lanthanide Complexation
Nanoparticles
Nitrilotriacetic acid
NTA
Nuclear-Magnetic-Resonance
Outer-Sphere
Oxide Nanoparticles
Stabilization
Thermodynamics
Trivalent Lanthanide
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Summary:An extremely stable water dispersion of cerium oxide nanoparticles was prepared by colloidal synthesis, using nitrilotriacetic acid (NTA) as a stabilizer. Based on FT-IR measurements, the surface characteristics of NTA-stabilized ceria nanoparticles are clarified and a fundamental stabilization mechanism is proposed. The mechanism is based on the combination of the ionic nature of cerium oxide surface and the inner-sphere complexation model. From an application perspective it is remarkable that ceria nanoparticle dispersions stabilized by NTA are stable at neutral pH, which makes them a potential successful additive in UV screening applications.
ISSN:2046-2069
2046-2069
DOI:10.1039/C3RA45875J