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Single-crystalline nanoporous Nb2O5 nanotubes.

Liu J, Xue D, Li K - Nanoscale Res Lett (2011)

Bottom Line: Dense nanopores with the diameters of several nanometers were created on the shell of Nb2O5 tubular structures, which can also retain the crystallographic orientation of Nb2O5 precursor nanorods.The present chemical etching strategy is versatile and can be extended to different-sized nanorod precursors.Furthermore, these as-obtained nanorod precursors and nanotube products can also be used as template for the fabrication of 1 D nanostructured niobates, such as LiNbO3, NaNbO3, and KNbO3.

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Affiliation: State Key Laboratory of Fine Chemicals, Department of Materials Science and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, People's Republic of China. dfxue@dlut.edu.cn.

ABSTRACT
Single-crystalline nanoporous Nb2O5 nanotubes were fabricated by a two-step solution route, the growth of uniform single-crystalline Nb2O5 nanorods and the following ion-assisted selective dissolution along the [001] direction. Nb2O5 tubular structure was created by preferentially etching (001) crystallographic planes, which has a nearly homogeneous diameter and length. Dense nanopores with the diameters of several nanometers were created on the shell of Nb2O5 tubular structures, which can also retain the crystallographic orientation of Nb2O5 precursor nanorods. The present chemical etching strategy is versatile and can be extended to different-sized nanorod precursors. Furthermore, these as-obtained nanorod precursors and nanotube products can also be used as template for the fabrication of 1 D nanostructured niobates, such as LiNbO3, NaNbO3, and KNbO3.

No MeSH data available.


Composition characterizations of Nb2O5 nanotube products: XRD (a) and EDX (b) patterns of single-crystalline nanoporous Nb2O5 nanotubes. All the peaks in Figure 3a totally overlap with those of pure Nb2O5 (compare reference lines, JCPDS no. 30-0873) and no evidence of any impurity was detected.
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Figure 3: Composition characterizations of Nb2O5 nanotube products: XRD (a) and EDX (b) patterns of single-crystalline nanoporous Nb2O5 nanotubes. All the peaks in Figure 3a totally overlap with those of pure Nb2O5 (compare reference lines, JCPDS no. 30-0873) and no evidence of any impurity was detected.

Mentions: After the hydrothermal process along with an interface reaction, Nb2O5 nanotubes were obtained with F--assisted etching treatment. The XRD pattern shown in Figure 3a reveals a pure phase, and all the diffraction peaks are very consist with that of nanorod precursors and the reported XRD profile of the orthorhombic Nb2O5 (JCPDS no. 30-0873). EDS analysis was used to determine the chemical composition of an individual nanotube. The result shows that these nanotube products contain only Nb and O elements, and their atomic ratio is about 2:5, which is in agreement with the stoichiometric ratio of Nb2O5. The EDS results clearly confirm that F was not doped into these nanotubes (Figure 3b).


Single-crystalline nanoporous Nb2O5 nanotubes.

Liu J, Xue D, Li K - Nanoscale Res Lett (2011)

Composition characterizations of Nb2O5 nanotube products: XRD (a) and EDX (b) patterns of single-crystalline nanoporous Nb2O5 nanotubes. All the peaks in Figure 3a totally overlap with those of pure Nb2O5 (compare reference lines, JCPDS no. 30-0873) and no evidence of any impurity was detected.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211185&req=5

Figure 3: Composition characterizations of Nb2O5 nanotube products: XRD (a) and EDX (b) patterns of single-crystalline nanoporous Nb2O5 nanotubes. All the peaks in Figure 3a totally overlap with those of pure Nb2O5 (compare reference lines, JCPDS no. 30-0873) and no evidence of any impurity was detected.
Mentions: After the hydrothermal process along with an interface reaction, Nb2O5 nanotubes were obtained with F--assisted etching treatment. The XRD pattern shown in Figure 3a reveals a pure phase, and all the diffraction peaks are very consist with that of nanorod precursors and the reported XRD profile of the orthorhombic Nb2O5 (JCPDS no. 30-0873). EDS analysis was used to determine the chemical composition of an individual nanotube. The result shows that these nanotube products contain only Nb and O elements, and their atomic ratio is about 2:5, which is in agreement with the stoichiometric ratio of Nb2O5. The EDS results clearly confirm that F was not doped into these nanotubes (Figure 3b).

Bottom Line: Dense nanopores with the diameters of several nanometers were created on the shell of Nb2O5 tubular structures, which can also retain the crystallographic orientation of Nb2O5 precursor nanorods.The present chemical etching strategy is versatile and can be extended to different-sized nanorod precursors.Furthermore, these as-obtained nanorod precursors and nanotube products can also be used as template for the fabrication of 1 D nanostructured niobates, such as LiNbO3, NaNbO3, and KNbO3.

View Article: PubMed Central - HTML - PubMed

Affiliation: State Key Laboratory of Fine Chemicals, Department of Materials Science and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, People's Republic of China. dfxue@dlut.edu.cn.

ABSTRACT
Single-crystalline nanoporous Nb2O5 nanotubes were fabricated by a two-step solution route, the growth of uniform single-crystalline Nb2O5 nanorods and the following ion-assisted selective dissolution along the [001] direction. Nb2O5 tubular structure was created by preferentially etching (001) crystallographic planes, which has a nearly homogeneous diameter and length. Dense nanopores with the diameters of several nanometers were created on the shell of Nb2O5 tubular structures, which can also retain the crystallographic orientation of Nb2O5 precursor nanorods. The present chemical etching strategy is versatile and can be extended to different-sized nanorod precursors. Furthermore, these as-obtained nanorod precursors and nanotube products can also be used as template for the fabrication of 1 D nanostructured niobates, such as LiNbO3, NaNbO3, and KNbO3.

No MeSH data available.