Synthesis and catalytic properties of microemulsion-derived cerium oxide nanoparticles

Journal Article · Tue Jul 15 00:00:00 EDT 2008 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2008.04.036· OSTI ID:21128351

Kockrick, Emanuel; Schrage, Christian; Grigas, Anett ^[1]; Geiger, Dorin ^[2]; Kaskel, Stefan ^[1]

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1. Department of Inorganic Chemistry, Dresden University of Technology, Mommsenstr. 6, D-01062 Dresden (Germany)
2. Triebenberg Laboratory for HRTEM and Electron Holography, Institute for Structure Physics, Dresden University of Technology, Zum Triebenberg 50, D-01328 Dresden (Germany)

The synthesis of cerium dioxide nanoparticles using an inverse microemulsion technique and precipitation method was investigated. Cerium hydroxide nanoparticles were synthesized by adding diluted ammonia to n-heptane-surfactant-cerium nitrate system. The micelle and particle size in the range of 5-12 nm were controlled by varying the molar water to surfactant ratio and analyzed by dynamic light scattering (DLS), small angle X-ray scattering (SAXS) and high-resolution transmission electron microscopy (HRTEM). Cerium hydroxide nanoparticles were isolated and subsequently treated at 100-600 deg. C to obtain nanoscale ceria. Crystallite sizes of cerium dioxide in the range of 6-16 nm were estimated by Scherrer analysis by X-ray diffraction (XRD) and HRTEM. The catalytic activity of particles annealed at 400 and 600 deg. C in soot combustion reactions was characterized by temperature-programmed oxidation (TPO) indicating a size-dependant activity. Crystallite sizes and catalytic stability of elevated ceria systems were tested in second combustion cycles. - Graphical abstract: The synthesis of cerium dioxide nanoparticles using an inverse microemulsion technique and precipitation method was investigated using small angle X-ray scattering, dynamic light scattering and high-resolution transmission electron microscopy. Catalytic activity of ceria nanoparticles was tested in soot combustion reaction indicating size-dependent reactivity.

• OSTI ID: 21128351
• Journal Information: Journal of Solid State Chemistry, Vol. 181, Issue 7; Other Information: DOI: 10.1016/j.jssc.2008.04.036; PII: S0022-4596(08)00212-0; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANNEALING
CATALYSIS
CERIUM HYDROXIDES
CERIUM NITRATES
CERIUM OXIDES
COMBUSTION
LIGHT SCATTERING
MICROEMULSIONS
NANOSTRUCTURES
PARTICLE SIZE
PARTICLES
PRECIPITATION
SMALL ANGLE SCATTERING
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION