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Ceria Nanotube Formed by Sacrificed Precursors Template through Oswald Ripening.

Pang L, Wang X, Tang X - PLoS ONE (2015)

Bottom Line: Controllable preparation of ceria nanotube was realized by hydrothermal treatment of Ce(OH)CO3 precursors.The gradually changing morphologies and microstructures of cerium oxide were characterized by X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy.On the basis of the time-dependent experimental observation, the possible formation mechanism related to oriented attachment and Oswald ripening was proposed, which might afford some guidance for the synthesis of other inorganic nanotubes.

View Article: PubMed Central - PubMed

Affiliation: School of Material Science and Engineering, Shandong Jiaotong University, Jinan, P.R China.

ABSTRACT
Controllable preparation of ceria nanotube was realized by hydrothermal treatment of Ce(OH)CO3 precursors. The gradually changing morphologies and microstructures of cerium oxide were characterized by X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy. A top-down path is illuminated to have an insight to the morphological transformation from nanorod to nanotube by adjusting the reaction time. The growth process is investigated by preparing a series of intermediate morphologies during the shape evolution of CeO2 nanostructure based on the scanning electron microscopy image observation. On the basis of the time-dependent experimental observation, the possible formation mechanism related to oriented attachment and Oswald ripening was proposed, which might afford some guidance for the synthesis of other inorganic nanotubes.

No MeSH data available.


Related in: MedlinePlus

XRD patterns of the as-synthesizde Ce(OH)CO3 precursors (a) and CeO2 nanotubes (b).
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pone.0132536.g003: XRD patterns of the as-synthesizde Ce(OH)CO3 precursors (a) and CeO2 nanotubes (b).

Mentions: Fig 3 shows a typical XRD pattern of the as-synthesized Ce(OH)CO3 and CeO2 nanotubes. All peaks in the Fig 3a can be well-indexed to a pure hexagonal phase of Ce(OH)CO3 (space group:P 2c) with calculated lattice constants a = 1.252nm and c = 1.000nm, which is in good agreements with the JCPDS file for Ce(OH)CO3 (JCPDS 52–0352). No impurity peaks are observed, indicating a high purity of the final products. In Fig 3b all peaks can be indexed as the cubic phase (Fmm, JCPDS 34–0394) with a lattice constant a = 0.5411nm. The strong and sharp diffraction peaks indicate the good crystallization of the sample. No obvious peaks corresponding to cerium nitrate or other cerium oxides were observed in the powder pattern.


Ceria Nanotube Formed by Sacrificed Precursors Template through Oswald Ripening.

Pang L, Wang X, Tang X - PLoS ONE (2015)

XRD patterns of the as-synthesizde Ce(OH)CO3 precursors (a) and CeO2 nanotubes (b).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494707&req=5

pone.0132536.g003: XRD patterns of the as-synthesizde Ce(OH)CO3 precursors (a) and CeO2 nanotubes (b).
Mentions: Fig 3 shows a typical XRD pattern of the as-synthesized Ce(OH)CO3 and CeO2 nanotubes. All peaks in the Fig 3a can be well-indexed to a pure hexagonal phase of Ce(OH)CO3 (space group:P 2c) with calculated lattice constants a = 1.252nm and c = 1.000nm, which is in good agreements with the JCPDS file for Ce(OH)CO3 (JCPDS 52–0352). No impurity peaks are observed, indicating a high purity of the final products. In Fig 3b all peaks can be indexed as the cubic phase (Fmm, JCPDS 34–0394) with a lattice constant a = 0.5411nm. The strong and sharp diffraction peaks indicate the good crystallization of the sample. No obvious peaks corresponding to cerium nitrate or other cerium oxides were observed in the powder pattern.

Bottom Line: Controllable preparation of ceria nanotube was realized by hydrothermal treatment of Ce(OH)CO3 precursors.The gradually changing morphologies and microstructures of cerium oxide were characterized by X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy.On the basis of the time-dependent experimental observation, the possible formation mechanism related to oriented attachment and Oswald ripening was proposed, which might afford some guidance for the synthesis of other inorganic nanotubes.

View Article: PubMed Central - PubMed

Affiliation: School of Material Science and Engineering, Shandong Jiaotong University, Jinan, P.R China.

ABSTRACT
Controllable preparation of ceria nanotube was realized by hydrothermal treatment of Ce(OH)CO3 precursors. The gradually changing morphologies and microstructures of cerium oxide were characterized by X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy. A top-down path is illuminated to have an insight to the morphological transformation from nanorod to nanotube by adjusting the reaction time. The growth process is investigated by preparing a series of intermediate morphologies during the shape evolution of CeO2 nanostructure based on the scanning electron microscopy image observation. On the basis of the time-dependent experimental observation, the possible formation mechanism related to oriented attachment and Oswald ripening was proposed, which might afford some guidance for the synthesis of other inorganic nanotubes.

No MeSH data available.


Related in: MedlinePlus