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In situ Precursor-Template Route to Semi-Ordered NaNbO 3 Nanobelt Arrays

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ABSTRACT

We exploited a precursor-template route to chemically synthesize NaNbO3 nanobelt arrays. Na7(H3O)Nb6O19·14H2O nanobelt precursor was firstly prepared via a hydrothermal synthetic route using Nb foil. The aspect ratio of the precursor is controllable facilely depending on the concentration of NaOH aqueous solution. The precursor was calcined in air to yield single-crystalline monoclinic NaNbO3 nanobelt arrays. The proposed scheme for NaNbO3 nanobelt formation starting from Nb metal may be extended to the chemical fabrication of more niobate arrays.

No MeSH data available.


SEM images of Na7(H3O)Nb6O19·14H2O precursor prepared at different NaOH concentrations: a, b 0.5–0.8 M, and c, d 1–1.5 M.
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Figure 4: SEM images of Na7(H3O)Nb6O19·14H2O precursor prepared at different NaOH concentrations: a, b 0.5–0.8 M, and c, d 1–1.5 M.

Mentions: We can control the aspect ratio and micropatterns of Na7(H3O)Nb6O19·14H2O structures by tuning NaOH concentration in the wet chemistry process. At a concentration of 0.5–0.8 M, hedgehog-like patterns are formed. The dense Na7(H3O)Nb6O19·14H2O microbars are with widths mostly less than 1 μm and thicknesses around 150 nm (Figure 4a, b). However, when the concentration is increased to 1–1.5 M, the nanobelts become so long that they gather compactly and overspread the substrate (Figure 4c, d). Therefore, we conclude that the alkaline concentration has a significant influence on morphology.


In situ Precursor-Template Route to Semi-Ordered NaNbO 3 Nanobelt Arrays
SEM images of Na7(H3O)Nb6O19·14H2O precursor prepared at different NaOH concentrations: a, b 0.5–0.8 M, and c, d 1–1.5 M.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211187&req=5

Figure 4: SEM images of Na7(H3O)Nb6O19·14H2O precursor prepared at different NaOH concentrations: a, b 0.5–0.8 M, and c, d 1–1.5 M.
Mentions: We can control the aspect ratio and micropatterns of Na7(H3O)Nb6O19·14H2O structures by tuning NaOH concentration in the wet chemistry process. At a concentration of 0.5–0.8 M, hedgehog-like patterns are formed. The dense Na7(H3O)Nb6O19·14H2O microbars are with widths mostly less than 1 μm and thicknesses around 150 nm (Figure 4a, b). However, when the concentration is increased to 1–1.5 M, the nanobelts become so long that they gather compactly and overspread the substrate (Figure 4c, d). Therefore, we conclude that the alkaline concentration has a significant influence on morphology.

View Article: PubMed Central - HTML - PubMed

ABSTRACT

We exploited a precursor-template route to chemically synthesize NaNbO3 nanobelt arrays. Na7(H3O)Nb6O19·14H2O nanobelt precursor was firstly prepared via a hydrothermal synthetic route using Nb foil. The aspect ratio of the precursor is controllable facilely depending on the concentration of NaOH aqueous solution. The precursor was calcined in air to yield single-crystalline monoclinic NaNbO3 nanobelt arrays. The proposed scheme for NaNbO3 nanobelt formation starting from Nb metal may be extended to the chemical fabrication of more niobate arrays.

No MeSH data available.