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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.

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.


XRD pattern of Nb2O5 nanorod precursors. All the peaks can be indexed to the orthorhombic Nb2O5 (JCPDS no. 30-0873).
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Figure 1: XRD pattern of Nb2O5 nanorod precursors. All the peaks can be indexed to the orthorhombic Nb2O5 (JCPDS no. 30-0873).

Mentions: Typical XRD pattern of the Nb2O5 nanorod precursors obtained from the ethanol-water system shown in Figure 1 exhibits diffraction peaks corresponding to the orthorhombic Nb2O5 with lattice constants of a = 3.607 Å and c = 3.925 Å (JCPDS no. 30-0873). No diffraction peaks arising from impurities such as NbO2 were detected, indicating the high purity of these precursor nanorods. The morphology of these precursor products was observed by means of SEM and TEM. Figure 2 shows typical SEM images of the obtained Nb2O5 precursors with uniform 1 D rod-like morphology. The high magnification image (Figure 2b) clearly displays these nanorods with the diameter 300-600 nm and the length 2-4 μm. The bottom inset of Figure 2b shows typical TEM image of a single solid Nb2O5 nanorod, demonstrating that the nanorod have a diameter of ~300 nm and length of approximately 2 μm, which is in agreement with the SEM observations. The HRTEM image (the top inset of Figure 2b) taken from the square area exhibits clear lattice fringes, indicating that the nanorod is highly crystallized. The spacing of 0.39 nm corresponds to the (001) planes of Nb2O5, which shows that these precursor nanorods grow along the [001] direction.


Single-crystalline nanoporous Nb2O5 nanotubes.

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

XRD pattern of Nb2O5 nanorod precursors. All the peaks can be indexed to the orthorhombic Nb2O5 (JCPDS no. 30-0873).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 1: XRD pattern of Nb2O5 nanorod precursors. All the peaks can be indexed to the orthorhombic Nb2O5 (JCPDS no. 30-0873).
Mentions: Typical XRD pattern of the Nb2O5 nanorod precursors obtained from the ethanol-water system shown in Figure 1 exhibits diffraction peaks corresponding to the orthorhombic Nb2O5 with lattice constants of a = 3.607 Å and c = 3.925 Å (JCPDS no. 30-0873). No diffraction peaks arising from impurities such as NbO2 were detected, indicating the high purity of these precursor nanorods. The morphology of these precursor products was observed by means of SEM and TEM. Figure 2 shows typical SEM images of the obtained Nb2O5 precursors with uniform 1 D rod-like morphology. The high magnification image (Figure 2b) clearly displays these nanorods with the diameter 300-600 nm and the length 2-4 μm. The bottom inset of Figure 2b shows typical TEM image of a single solid Nb2O5 nanorod, demonstrating that the nanorod have a diameter of ~300 nm and length of approximately 2 μm, which is in agreement with the SEM observations. The HRTEM image (the top inset of Figure 2b) taken from the square area exhibits clear lattice fringes, indicating that the nanorod is highly crystallized. The spacing of 0.39 nm corresponds to the (001) planes of Nb2O5, which shows that these precursor nanorods grow along the [001] direction.

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.