Electronic and structural properties of reduced-charge montmorillonites

Gates, Will P.; Komadel, Peter; Madejová, Jana; Bujdák, Juraj; Stucki, J. W.; Kirkpatrick, R. James

doi:10.1016/s0169-1317(99)00057-5

Cited by 62 publications

(27 citation statements)

References 33 publications

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“…These types of bonding obtained from the partial substitution of tetrahedral Si by Al and the octahedral Al by Mg and Fe. The IR results obtained for montmorillonite clay spectrum including the stretching and bending frequencies satisfactorily agreed with the previous observations [17,18]. Fig.…”

Section: Ftir Spectroscopicsupporting

confidence: 91%

Characterization of different cationic forms of montmorillonite by FTIR, XRD and TGA techniques

Elkhalifah

Murugesan

Bustam

2011

2011 National Postgraduate Conference

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This paper aims at characterization of different cationic forms of montmorillonite clay using FTIR, XRD and TGA techniques. Montmorillonite was separately treated with different alkaline and alkaline earth and transition metal cations, such as Na + , K + , Mg 2+ , Ca 2+ , Ni 2+ , Cu 2+ , Zn 2+ and Cd 2+ to get the corresponding homoionic forms of montmorillonite clay mineral. The developed samples were characterized by the above mentioned methods. FTIR spectra of the samples revealed that the exchangeable cations have a minor effect on the stretching and bending bands of the structural OH, while a major one on both position and intensity of the physically adsorbed water was reported. XRD showed the changes in the crystallographic spacings of montmorillonite clay mineral due to ion exchange process. Thermogravimetric study of the examine samples showed two DTG exothermic peaks in their DTG curves, attributed to the dehydration of the physically adsorbed and bounded water and dehydroxylation of the structural water respectively. All the results obtained proved that these exchangeable cations dominated the amount of the physically adsorbed water and initial humidity of the clay.

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Section: Ftir Spectroscopicsupporting

confidence: 91%

Characterization of different cationic forms of montmorillonite by FTIR, XRD and TGA techniques

Elkhalifah

Murugesan

Bustam

2011

2011 National Postgraduate Conference

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show abstract

“…These property improvements are attributed to the nanometric thickness and high aspect ratio of the individual clay platelets, as well as to the nanocomposite morphology with the platelets being exfoliated and welldispersed (Gates et al, 2000;Svensson et al, 2010). Ag nanoparticles are widely used as a photosensitive components, catalysts and chemical analysis.…”

Section: Introductionmentioning

confidence: 99%

Electrospinning Fabrication and Characterization of Water Soluble Polymer/Montmorillonite/Silver Nanocomposite Nanofibers out of Aqueous Solution

Yeum¹,

Park²,

Kim³

et al. 2011

Advances in Nanocomposites - Synthesis, Characterization and Industrial Applications

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“…IR spectroscopy has significantly contributed to the understanding of the structure, bonding, and reactivity of clay minerals [7][8][9][10][11][12][13]. The examination of the IR spectra (4000-400 cm −1 ) provides information on fundamental vibrational modes of the constituent units of these materials.…”

Section: Introductionmentioning

confidence: 99%

An investigation of Cu(II) adsorption by raw and acid-activated bentonite: A combined potentiometric, thermodynamic, XRD, IR, DTA study

Eren

Afsin

2008

Journal of Hazardous Materials

201

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Electronic and structural properties of reduced-charge montmorillonites

Cited by 62 publications

References 33 publications

Characterization of different cationic forms of montmorillonite by FTIR, XRD and TGA techniques

Characterization of different cationic forms of montmorillonite by FTIR, XRD and TGA techniques

Electrospinning Fabrication and Characterization of Water Soluble Polymer/Montmorillonite/Silver Nanocomposite Nanofibers out of Aqueous Solution

An investigation of Cu(II) adsorption by raw and acid-activated bentonite: A combined potentiometric, thermodynamic, XRD, IR, DTA study

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