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The stability of halloysite nanotubes in acidic and alkaline aqueous suspensions

White, Rachel D., Bavykin, Dmitry V. and Walsh, F.C. (2012) The stability of halloysite nanotubes in acidic and alkaline aqueous suspensions Nanotechnology, 23, (6), 065705-065715. (doi:10.1088/0957-4484/23/6/065705).

Record type: Article

Abstract

The long term stability of natural halloysite nanotubes was studied at room temperature (22 ± 2 ºC) in pure water, acidic and basic aqueous suspensions. The structural and morphological transformations of nanotubes were studied by TEM, SEM, nitrogen adsorption, XRD Raman and FTIR spectroscopy accompanied by monitoring the concentration of dissolved Si(IV) and Al(III) in solution. It has been revealed that, in 1 mol dm-3 H2SO4 solution, the dissolution of halloysite is initiated on the inner surface of nanotubes leading to formation of amorphous spheroidal nanoparticles of SiO2 whereas, in 1 mol dm-3 NaOH solution, dissolution of inner surface of nanotubes is accompanied by formation of Al(OH)3 nanosheets.

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More information

e-pub ahead of print date: 17 January 2012
Published date: 17 February 2012
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 208351
URI: http://eprints.soton.ac.uk/id/eprint/208351
ISSN: 0957-4484
PURE UUID: 1acd65ca-c86b-41cd-8baa-6fbd319ac858

Catalogue record

Date deposited: 18 Jan 2012 15:15
Last modified: 18 Jul 2017 10:48

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