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Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Garikoe, Issaka and Sorgho, Brahima and Guel, Boubie and Persson, Ingmar (2021). Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso. Bulletin of the Chemical Society of Ethiopia. 35 , 43-59
[Research article]

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Abstract

Solid-state intercalation was applied to prepare organo-smectites using cationic surfactants and natural clays containing smectite at various surfactant/smectite ratios. The surfactants enter the interlayers of smectites causing a swelling of the clays. The used clays were collected in Sietougou and Diabari villages located in the eastern part of Burkina Faso. The solid-state intercalation was successful for all four surfactants applied, n-dodecyltrimethylammonium bromide, (n-C12H25(CH3)(3)NBr), n-tetradecyltrimethylammonium bromide, (n-C14H29(CH3)(3)NBr), n-hexadecyltrimethylammonium bromide (n-C16H33(CH3)(3)NBr) and di-n-dodecyldimethylammonium bromide ((n-C12H25)(2)(CH3)(2)NBr) at different levels of the cation exchange capacity (CEC). The synthesized organo-smectites were characterized regarding relative density, structural and textural properties. XRPD data showed a systematic increase of the basal spacing of the unit cell of the smectite up to >38 angstrom at 2.0-CEC loading of the surfactant. This increase indicates that the surfactants penetrated into the smectite interlayers with the surfactants being arranged parallel to the layers at low concentrations and almost perpendicular at high ones. FTIR spectra of the organo-smectites showed a decrease in the intensities of the water bands at around 1630 cm(-1) and 3400 cm(-1), and new specific bands close to 2920 cm(-1) and 2850 cm(-1) were assigned to the asymmetric and symmetric stretching of CH2 groups of the surfactants, respectively.

Authors/Creators:Garikoe, Issaka and Sorgho, Brahima and Guel, Boubie and Persson, Ingmar
Title:Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso
Series Name/Journal:Bulletin of the Chemical Society of Ethiopia
Year of publishing :2021
Volume:35
Page range:43-59
Number of Pages:17
Publisher:CHEM SOC ETHIOPIA
ISSN:1011-3924
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 104 Chemical Sciences > Physical Chemistry
Keywords:Smectite, Organo-smectite, Surfactant, Intercalation
URN:NBN:urn:nbn:se:slu:epsilon-p-112451
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112451
Additional ID:
Type of IDID
DOI10.4314/bcse.v35i1.4
Web of Science (WoS)000648477500004
ID Code:24565
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Molecular Sciences
Deposited By: SLUpub Connector
Deposited On:18 Jun 2021 11:43
Metadata Last Modified:18 Jun 2021 11:51

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