Effective intercalation of sodium dodecylsulfate (SDS) into hydrocalumite: Mechanism discussion via near-infrared and mid-infrared investigations

Zhang, Ping, Wang, Tianqi, Qian, Guangren, Wu, Daishe, & Frost, Ray L. (2015) Effective intercalation of sodium dodecylsulfate (SDS) into hydrocalumite: Mechanism discussion via near-infrared and mid-infrared investigations. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 149, pp. 166-172.

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Abstract

The intercalation of an anionic surfactant, sodium dodecylsulfate (SDS), into hydrocalumite (CaAl-LDH-Cl) was investigated in this study. To understand the intercalation behavior, X-ray diffraction (XRD), mid-infrared spectroscopy (MIR), near-infrared spectroscopy (NIR) and scanning electron microscopy (SEM) were undertaken. The near-infrared spectra indicated a special spectral range from 6000 to 5600cm-1and prominent bands of CaAl-LDH-Cl intercalated with SDS around 8388cm-1. This band was assigned to the second overtone of the first fundamental of CH stretching vibrations of SDS, and it could be used to determinate the result of CaAl-LDH-Cl modified by SDS. Moreover, the results revealed that different adsorption behaviors were observed at different (high and low) concentrations of SDS. When the SDS concentration was around 0.2molL-1, anion exchange intercalation occurred and the interlayer distance expanded to about 3.25nm. When SDS concentration was 0.005molL-1, the surface adsorption of DS- was the major anion exchange event.

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ID Code: 84483
Item Type: Journal Article
Refereed: Yes
Keywords: Hydrocalumite, Intercalation, Mid-infrared spectroscopy (MIR), Near-infrared spectroscopy (NIR), Sodium dodecylsulfate (SDS)
DOI: 10.1016/j.saa.2015.04.012
ISSN: 1386-1425
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Elsevier
Copyright Statement: This is the author’s version of a work that was accepted for publication in Spectrochimica Acta Part A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Spectrochimica Acta Part A, [VOL 149, 2015] DOI: 10.1016/j.saa.2015.04.012
Deposited On: 26 May 2015 03:18
Last Modified: 15 Jun 2015 16:39

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