Synthesis of nanocrystalline ceria by thermal decomposition and soft-chemistry methods

Kamruddin, M.; Ajikumar, P.K.; Nithya, R.; Tyagi, A.K.; Raj, Baldev

doi:10.1016/j.scriptamat.2003.11.010

Cited by 85 publications

(54 citation statements)

References 24 publications

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“…[8] Qualitatively similar findings were reported in the case of annealed CeO 2 nanoparticles produced via a soft chemistry route. [41] For these particles the lattice constant decreased from 0.5417 to 0.5410 nm while temperature was increased from 300 to 1000 8C. This corresponds to a small change in lattice constant around 0.2% for DT ¼ 700 8C.…”

Section: Microstructures Of Ceo 2 Spray Pyrolysis Thin Filmsmentioning

confidence: 85%

Crystallization and Grain Growth Kinetics for Precipitation‐Based Ceramics: A Case Study on Amorphous Ceria Thin Films from Spray Pyrolysis

Rupp

Scherrer

Harvey

et al. 2009

Adv Funct Materials

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The introductory part reviews the impact of thin film fabrication, precipitation versus vacuum‐based methods, on the initial defect state of the material and microstructure evolution to amorphous, biphasic amorphous‐nanocrystalline, and fully nanocrystalline metal oxides. In this study, general rules for the kinetics of nucleation, crystallization, and grain growth of a pure single‐phase metal oxide thin film made by a precipitation‐based technique from a precursor with one single organic solvent are discussed. For this a complete case study on the isothermal and non‐isothermal microstructure evolution of dense amorphous ceria thin films fabricated by spray pyrolysis is conducted. A general model is established and comparison of these thin film microstructure evolution to kinetics of classical glass‐ceramics or metallic glasses is presented. Knowledge on thermal microstructure evolution of originally amorphous precipitation‐based metal oxide thin films allows for their introduction and distinctive microstructure engineering in devices‐based on microelectromechanical (MEMS) technology such as solar cells, capacitors, sensors, micro‐solid oxide fuel cells, or oxygen separation membranes on Si‐chips.

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Section: Microstructures Of Ceo 2 Spray Pyrolysis Thin Filmsmentioning

confidence: 85%

Crystallization and Grain Growth Kinetics for Precipitation‐Based Ceramics: A Case Study on Amorphous Ceria Thin Films from Spray Pyrolysis

Rupp

Scherrer

Harvey

et al. 2009

Adv Funct Materials

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“…A great deal of interest in gadolinium oxide exists because of its physicochemical properties, such as the crystallographic stability up to temperatures of 2325 C, high mechanical strength, excellent thermal conductivity, and a wide band optical gap [4]. Generally, nanoparticles of lanthanide oxides can be prepared using a variety of methods, such as homogeneous precipitation [5], thermal decomposition [6], combustion method [7], microemulsion techniques [8], hydrothermal crystallization [9], spray pyrolysis [10], sol-gel [11], sonochemical methods [12], and other methods [13]. Most often nanocrystallites of lanthanide oxides are prepared through calcination methods using a suitable precursor [14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Gadolinium Oxide Nanocrystallites

Kuzníková¹,

Dědková²,

Pavelek³

et al. 2017

Proceedings of the 2nd Czech-China Scientific Conference 2016

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Lanthanide oxide nanocrystallites have gained a lot of attention due to their diverse use for potential applications and for this reason it is very important to find a suitable preparation method that would be economically inexpensive and easy to implement. The chapter describes the preparation of gadolinium oxide nanocrystallites (nano Gd 2 O 3 ) through thermal decomposition of a complex formed by Gd(NO 3 ) 3 ·6H 2 O and glycine. Decomposition of the complex occurs at temperatures about (250 ± 10)C. An ultrafine white powder of the gadolinium oxide nanocrystallites was obtained. The resulting nanocrystallites were characterized by X-ray powder diffraction analysis, which revealed the size of the gadolinium oxide nanocrystallites equal to 10 nm. The morphology of the gadolinium oxide nanocrystallites was examined by scanning electron microscopy. The elemental composition of the product was confirmed by EDS analysis.

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“…Cerium oxide (CeO 2 ) is a semiconductor with wide band gap energy (3.19eV). In the recent years, much effort has been made towards the development of new synthetic routes for preparing nanostructure cerium oxides due to their potential uses in many applications, such as high-storage capacitor devices, buffer layers for conductors, fuel cells, polishing materials, UV blocks and optical devices [1][2][3][4][5][6][7] . The cerium oxide nanoparticles are prepared by various methods [8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Structural, Optical, Morphological and Dielectric Properties of Cerium Oxide Nanoparticles

Prabaharan¹,

Sadaiyandi

Mahendran³

et al. 2016

Mat. Res.

158

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Cerium oxide (CeO 2 ) nanoparticles were prepared by the precipitation method. The average crystallite size of cerium oxide nanoparticles was calculated from the X-ray diffraction (XRD) pattern and found to be 11 nm. The FT-IR spectrum clearly indicated the strong presence of cerium oxide nanoparticles. Raman spectrum confirmed the cubic nature of the cerium oxide nanoparticles. The Scanning Electron Microscopy (SEM) analysis showed that the nanoparticles agglomerated forming spherical-shaped particles. The Transmission Electron Microscopic (TEM) analysis confirmed the prepared cerium oxide nanoparticles with the particle size being found to be 16 nm. The optical absorption spectrum showed a blue shift by the cerium oxide nanoparticles due to the quantum confinement effect. The dielectric properties of cerium oxide nanoparticles were studied for different frequencies at different temperatures. The dielectric constant and the dielectric loss of the cerium oxide nanoparticles decreased with increase in frequency. The AC electrical conductivity study revealed that the conduction depended on both the frequency and the temperature.

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Synthesis of nanocrystalline ceria by thermal decomposition and soft-chemistry methods

Cited by 85 publications

References 24 publications

Crystallization and Grain Growth Kinetics for Precipitation‐Based Ceramics: A Case Study on Amorphous Ceria Thin Films from Spray Pyrolysis

Crystallization and Grain Growth Kinetics for Precipitation‐Based Ceramics: A Case Study on Amorphous Ceria Thin Films from Spray Pyrolysis

Synthesis and Characterization of Gadolinium Oxide Nanocrystallites

Structural, Optical, Morphological and Dielectric Properties of Cerium Oxide Nanoparticles

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