CeO2nanoparticles synthesized by a microwave-assisted hydrothermal method: evolution from nanospheres to nanorods
- 23 November 2011
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in CrystEngComm
- Vol. 14 (3), 1150-1154
- https://doi.org/10.1039/c1ce06188g
Abstract
Ceria (CeO2) plays a vital role in emerging technologies for environmental and energy-related applications. The catalytic efficiency of ceria nanoparticles depends on its morphology. In this study, CeO2 nanoparticles were synthesized by a microwave-assisted hydrothermal method under different synthesis temperatures. The samples were characterized by X-ray diffraction, transmission electron microscopy, Raman scattering spectroscopy, electron paramagnetic resonance spectroscopy and by the Brunauer–Emmett–Teller method. The X-ray diffraction and Raman scattering results indicated that all the synthesized samples had a pure cubic CeO2 structure. Rietveld analysis and Raman scattering also revealed the presence of structural defects due to an associated reduction in the valence of the Ce4+ ions to Ce3+ ions caused by an increasing molar fraction of oxygen vacancies. The morphology of the samples was controlled by varying the synthesis temperature. The TEM images show that samples synthesized at 80 °C consisted of spherical particles of about 5 nm, while those synthesized at 120 °C presented a mix of spherical and rod-like nanoparticles and the sample synthesized at 160 °C consisted of nanorods with 10 nm average diameter and 70 nm length. The microwave-assisted method proved to be highly efficient for the synthesis of CeO2 nanoparticles with different morphologies.This publication has 46 references indexed in Scilit:
- Synthesis, Characterization, and Application of 1-D Cerium Oxide Nanomaterials: A ReviewInternational Journal of Molecular Sciences, 2010
- Template-Free Synthesis of Sphere, Rod and Prism Morphologies of CeO2 Oxidation CatalystsCatalysis Letters, 2010
- Copper-cerium oxide catalysts prepared by the Pechini method for CO removal from hydrogen-containing mixturesKinetics and Catalysis, 2010
- Facile synthesis of free-standing CeO2 nanorods for photoelectrochemical applicationsChemical Communications, 2010
- Morphology-dependent redox and catalytic properties of CeO2 nanostructures: Nanowires, nanorods and nanoparticlesCatalysis Today, 2009
- Dopant-mediated oxygen vacancy tuning in ceria nanoparticlesNanotechnology, 2009
- Gas Sensing Properties of Columnar CeO2 Nanostructures Prepared by Chemical Vapor DepositionJournal of Nanoscience and Nanotechnology, 2008
- Role of the Oriented Attachment Mechanism in the Phase Transformation of Oxide NanocrystalsChemistry – A European Journal, 2007
- Oriented Attachment Mechanism in Anisotropic Nanocrystals: A “Polymerization” ApproachChemphyschem, 2006
- Heteroepitaxial Growth of Nanostructured Cerium Dioxide Thin Films by MOCVD on a (001) TiO2 SubstrateChemistry of Materials, 2003