Mechanism of silica nano-plate formation from lucentite

Nguyen H. Tran; Michael A. Wilson; Adriyan S. Milev; Gary R. Dennis; Kamali Kannangara

doi:10.1142/S0218625X07009311

Mechanism of silica nano-plate formation from lucentite

Nguyen H. Tran, Michael A. Wilson, Adriyan S. Milev, Gary R. Dennis, Kamali Kannangara

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Abstract

The mechanism of formation of silica nano-plates by exfoliation of a phyllosilicate magnesium containing clay, Lucentite, in an aqueous solution of poly(acrylic acid) has been studied. Fourier transform infrared spectroscopy and Mg K-edge near edge X-ray adsorption fine structure (NEXAFS) analysis shows that non-surface (bulk) Mg ions were not chemically involved in the poly(acrylic acid)/clay intercalation, but were substantially involved in the exfoliation resulting in the silica nano-plates. During intercalation, O K-edge NEXAFS shows that surface defects were formed which represent additional structural branches on the surface. During exfoliation, these increased significantly. Si L3,2-edge NEXAFS measurements shows that this occurred by migration of SiO4 groups within the exfoliated silica plates.

Original language	English
Pages (from-to)	235-239
Number of pages	5
Journal	Surface Review and Letters
Volume	14
Issue number	2
DOIs	https://doi.org/10.1142/S0218625X07009311
Publication status	Published - Apr 2007

Keywords

acid
acrylic
adsorption
clay
ions
silica

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title = "Mechanism of silica nano-plate formation from lucentite",

abstract = "The mechanism of formation of silica nano-plates by exfoliation of a phyllosilicate magnesium containing clay, Lucentite, in an aqueous solution of poly(acrylic acid) has been studied. Fourier transform infrared spectroscopy and Mg K-edge near edge X-ray adsorption fine structure (NEXAFS) analysis shows that non-surface (bulk) Mg ions were not chemically involved in the poly(acrylic acid)/clay intercalation, but were substantially involved in the exfoliation resulting in the silica nano-plates. During intercalation, O K-edge NEXAFS shows that surface defects were formed which represent additional structural branches on the surface. During exfoliation, these increased significantly. Si L3,2-edge NEXAFS measurements shows that this occurred by migration of SiO4 groups within the exfoliated silica plates.",

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author = "Tran, {Nguyen H.} and Wilson, {Michael A.} and Milev, {Adriyan S.} and Dennis, {Gary R.} and Kamali Kannangara",

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T1 - Mechanism of silica nano-plate formation from lucentite

AU - Tran, Nguyen H.

AU - Wilson, Michael A.

AU - Milev, Adriyan S.

AU - Dennis, Gary R.

AU - Kannangara, Kamali

PY - 2007/4

Y1 - 2007/4

N2 - The mechanism of formation of silica nano-plates by exfoliation of a phyllosilicate magnesium containing clay, Lucentite, in an aqueous solution of poly(acrylic acid) has been studied. Fourier transform infrared spectroscopy and Mg K-edge near edge X-ray adsorption fine structure (NEXAFS) analysis shows that non-surface (bulk) Mg ions were not chemically involved in the poly(acrylic acid)/clay intercalation, but were substantially involved in the exfoliation resulting in the silica nano-plates. During intercalation, O K-edge NEXAFS shows that surface defects were formed which represent additional structural branches on the surface. During exfoliation, these increased significantly. Si L3,2-edge NEXAFS measurements shows that this occurred by migration of SiO4 groups within the exfoliated silica plates.

AB - The mechanism of formation of silica nano-plates by exfoliation of a phyllosilicate magnesium containing clay, Lucentite, in an aqueous solution of poly(acrylic acid) has been studied. Fourier transform infrared spectroscopy and Mg K-edge near edge X-ray adsorption fine structure (NEXAFS) analysis shows that non-surface (bulk) Mg ions were not chemically involved in the poly(acrylic acid)/clay intercalation, but were substantially involved in the exfoliation resulting in the silica nano-plates. During intercalation, O K-edge NEXAFS shows that surface defects were formed which represent additional structural branches on the surface. During exfoliation, these increased significantly. Si L3,2-edge NEXAFS measurements shows that this occurred by migration of SiO4 groups within the exfoliated silica plates.

KW - acid

KW - acrylic

KW - adsorption

KW - clay

KW - ions

KW - silica

UR - http://handle.uws.edu.au:8081/1959.7/37365

UR - http://search.ebscohost.com/login.aspx?direct=true&db=a9h&AN=25654479&site=ehost-live

U2 - 10.1142/S0218625X07009311

DO - 10.1142/S0218625X07009311

M3 - Article

SN - 0218-625X

VL - 14

SP - 235

EP - 239

JO - Surface Review and Letters

JF - Surface Review and Letters

IS - 2

ER -

Mechanism of silica nano-plate formation from lucentite

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