Morphological control of synthetic Ni3Si2O5(OH)4 nanotubes in an alkaline hydrothermal environment
Morphological control of synthetic Ni3Si2O5(OH)4 nanotubes in an alkaline hydrothermal environment
Hydrothermal synthesis of nickel silicate nanotubes has been systematically studied in aqueous alkaline environments at 195 ºC by varying the Ni/Si molar ratio of the solid materials and the concentration of dissolved NaOH in the precursor suspension. A Ni/Si ratio of 1.5 is ideal for the formation of pure multiwalled nanotubes having a characteristic inner diameter of 10 nm and a typical length of 90 - 300 nm. The nanotubes have straight walls with a high degree of crystallinity. At lower Ni/Si ratios small nanosheets are formed, with a nickel-deficient layered structure, and nanosheets of ?-Ni(OH)2 are formed in addition to nanotubes at Ni/Si > 1.5. Nanotubes are formed over a wide range of NaOH concentration, 2 – 10 wt %, but the NaOH concentration has a large effect on aspect ratio, with much longer tubes (almost 300 nm) being formed at 10 wt % NaOH. This result has interesting implications for the design of nickel silicate nanostructures for use in applications such as lithium batteries, mesoporous catalyst supports and reinforced polymer composites.
nanotubes, silicates
548-556
White, Rachel D.
f5f9f0e7-a256-4714-b752-e3bb8dab03fc
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
21 January 2013
White, Rachel D.
f5f9f0e7-a256-4714-b752-e3bb8dab03fc
Bavykin, Dmitry V.
1e9fabfc-d078-4585-876f-85ff33b7eed5
Walsh, Frank C.
309528e7-062e-439b-af40-9309bc91efb2
White, Rachel D., Bavykin, Dmitry V. and Walsh, Frank C.
(2013)
Morphological control of synthetic Ni3Si2O5(OH)4 nanotubes in an alkaline hydrothermal environment.
Journal of Materials Chemistry, 1 (3), .
(doi:10.1039/C2TA00257D).
Abstract
Hydrothermal synthesis of nickel silicate nanotubes has been systematically studied in aqueous alkaline environments at 195 ºC by varying the Ni/Si molar ratio of the solid materials and the concentration of dissolved NaOH in the precursor suspension. A Ni/Si ratio of 1.5 is ideal for the formation of pure multiwalled nanotubes having a characteristic inner diameter of 10 nm and a typical length of 90 - 300 nm. The nanotubes have straight walls with a high degree of crystallinity. At lower Ni/Si ratios small nanosheets are formed, with a nickel-deficient layered structure, and nanosheets of ?-Ni(OH)2 are formed in addition to nanotubes at Ni/Si > 1.5. Nanotubes are formed over a wide range of NaOH concentration, 2 – 10 wt %, but the NaOH concentration has a large effect on aspect ratio, with much longer tubes (almost 300 nm) being formed at 10 wt % NaOH. This result has interesting implications for the design of nickel silicate nanostructures for use in applications such as lithium batteries, mesoporous catalyst supports and reinforced polymer composites.
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e-pub ahead of print date: 8 October 2012
Published date: 21 January 2013
Keywords:
nanotubes, silicates
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 346234
URI: http://eprints.soton.ac.uk/id/eprint/346234
PURE UUID: 9afa180c-8ad1-46db-8919-70642f11fe36
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Date deposited: 17 Dec 2012 16:30
Last modified: 14 Mar 2024 12:34
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