Effect of temperature on the local structure of Kaolinite intercalated with potassium acetate

Claire Emily White, John L. Provis, Laura E. Gordon, Daniel P. Riley, Thomas Proffen, Jannie S.J. Van Deventer

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Kaolinite intercalated with potassium acetate is of great interest in the areas of environmental remediation and industrial application; however, its exact atomic structure and the changes which occur when heated have remained largely elusive. Here, neutron pair distribution function analysis is used to investigate the local structural characteristics of this complex material, revealing that hydrated potassium acetate exists as a single layer in the interlamellar spacing of kaolinite. Furthermore, the potassium ions within the intercalated complex are most likely associated with the resonance structure of the acetate molecules, and upon heating (and decomposition of the carbon containing molecules), these ions become strongly associated with the negative charge located on the oxygen atoms in the alumina layers of dehydroxylated kaolinite. Several possible orientations of hydrated potassium acetate within the interlamellar spacing of kaolinite have been proposed and investigated using density functional modeling, revealing the complex nature of this material. Nevertheless, this investigation has shown that the dehydroxylated form of the intercalated compound contains highly strained alumina and available alkali (potassium), making it a viable alternative to traditional aluminosilicates.

Original languageEnglish (US)
Pages (from-to)188-199
Number of pages12
JournalChemistry of Materials
Volume23
Issue number2
DOIs
StatePublished - Jan 25 2011
Externally publishedYes

Fingerprint

Potassium Acetate
Kaolin
Kaolinite
Potassium
Aluminum Oxide
Ions
Alumina
Temperature
Molecules
Alkalies
Industrial applications
Aluminosilicates
Distribution functions
Neutrons
Acetates
Carbon
Oxygen
Decomposition
Heating
Atoms

All Science Journal Classification (ASJC) codes

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

White, C. E., Provis, J. L., Gordon, L. E., Riley, D. P., Proffen, T., & Van Deventer, J. S. J. (2011). Effect of temperature on the local structure of Kaolinite intercalated with potassium acetate. Chemistry of Materials, 23(2), 188-199. https://doi.org/10.1021/cm102648n
White, Claire Emily ; Provis, John L. ; Gordon, Laura E. ; Riley, Daniel P. ; Proffen, Thomas ; Van Deventer, Jannie S.J. / Effect of temperature on the local structure of Kaolinite intercalated with potassium acetate. In: Chemistry of Materials. 2011 ; Vol. 23, No. 2. pp. 188-199.
@article{2098b43882c04304b65e2b5b7b0e5c91,
title = "Effect of temperature on the local structure of Kaolinite intercalated with potassium acetate",
abstract = "Kaolinite intercalated with potassium acetate is of great interest in the areas of environmental remediation and industrial application; however, its exact atomic structure and the changes which occur when heated have remained largely elusive. Here, neutron pair distribution function analysis is used to investigate the local structural characteristics of this complex material, revealing that hydrated potassium acetate exists as a single layer in the interlamellar spacing of kaolinite. Furthermore, the potassium ions within the intercalated complex are most likely associated with the resonance structure of the acetate molecules, and upon heating (and decomposition of the carbon containing molecules), these ions become strongly associated with the negative charge located on the oxygen atoms in the alumina layers of dehydroxylated kaolinite. Several possible orientations of hydrated potassium acetate within the interlamellar spacing of kaolinite have been proposed and investigated using density functional modeling, revealing the complex nature of this material. Nevertheless, this investigation has shown that the dehydroxylated form of the intercalated compound contains highly strained alumina and available alkali (potassium), making it a viable alternative to traditional aluminosilicates.",
author = "White, {Claire Emily} and Provis, {John L.} and Gordon, {Laura E.} and Riley, {Daniel P.} and Thomas Proffen and {Van Deventer}, {Jannie S.J.}",
year = "2011",
month = "1",
day = "25",
doi = "https://doi.org/10.1021/cm102648n",
language = "English (US)",
volume = "23",
pages = "188--199",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "2",

}

White, CE, Provis, JL, Gordon, LE, Riley, DP, Proffen, T & Van Deventer, JSJ 2011, 'Effect of temperature on the local structure of Kaolinite intercalated with potassium acetate', Chemistry of Materials, vol. 23, no. 2, pp. 188-199. https://doi.org/10.1021/cm102648n

Effect of temperature on the local structure of Kaolinite intercalated with potassium acetate. / White, Claire Emily; Provis, John L.; Gordon, Laura E.; Riley, Daniel P.; Proffen, Thomas; Van Deventer, Jannie S.J.

In: Chemistry of Materials, Vol. 23, No. 2, 25.01.2011, p. 188-199.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of temperature on the local structure of Kaolinite intercalated with potassium acetate

AU - White, Claire Emily

AU - Provis, John L.

AU - Gordon, Laura E.

AU - Riley, Daniel P.

AU - Proffen, Thomas

AU - Van Deventer, Jannie S.J.

PY - 2011/1/25

Y1 - 2011/1/25

N2 - Kaolinite intercalated with potassium acetate is of great interest in the areas of environmental remediation and industrial application; however, its exact atomic structure and the changes which occur when heated have remained largely elusive. Here, neutron pair distribution function analysis is used to investigate the local structural characteristics of this complex material, revealing that hydrated potassium acetate exists as a single layer in the interlamellar spacing of kaolinite. Furthermore, the potassium ions within the intercalated complex are most likely associated with the resonance structure of the acetate molecules, and upon heating (and decomposition of the carbon containing molecules), these ions become strongly associated with the negative charge located on the oxygen atoms in the alumina layers of dehydroxylated kaolinite. Several possible orientations of hydrated potassium acetate within the interlamellar spacing of kaolinite have been proposed and investigated using density functional modeling, revealing the complex nature of this material. Nevertheless, this investigation has shown that the dehydroxylated form of the intercalated compound contains highly strained alumina and available alkali (potassium), making it a viable alternative to traditional aluminosilicates.

AB - Kaolinite intercalated with potassium acetate is of great interest in the areas of environmental remediation and industrial application; however, its exact atomic structure and the changes which occur when heated have remained largely elusive. Here, neutron pair distribution function analysis is used to investigate the local structural characteristics of this complex material, revealing that hydrated potassium acetate exists as a single layer in the interlamellar spacing of kaolinite. Furthermore, the potassium ions within the intercalated complex are most likely associated with the resonance structure of the acetate molecules, and upon heating (and decomposition of the carbon containing molecules), these ions become strongly associated with the negative charge located on the oxygen atoms in the alumina layers of dehydroxylated kaolinite. Several possible orientations of hydrated potassium acetate within the interlamellar spacing of kaolinite have been proposed and investigated using density functional modeling, revealing the complex nature of this material. Nevertheless, this investigation has shown that the dehydroxylated form of the intercalated compound contains highly strained alumina and available alkali (potassium), making it a viable alternative to traditional aluminosilicates.

UR - http://www.scopus.com/inward/record.url?scp=78751520931&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78751520931&partnerID=8YFLogxK

U2 - https://doi.org/10.1021/cm102648n

DO - https://doi.org/10.1021/cm102648n

M3 - Article

VL - 23

SP - 188

EP - 199

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 2

ER -