Changes in the surfaces of adsorbed paranitrophenol on HDTMA organoclay -an XRD and TG study

Frost, Ray L., Zhou, Qin, He, Hongping, & Xi, Yunfei (2007) Changes in the surfaces of adsorbed paranitrophenol on HDTMA organoclay -an XRD and TG study. Journal of Colloid and Interface Science, 307(1), pp. 50-55.

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Surfactant modified montmorillonitic clays synthesised by the ion exchange using the hydrothermal reaction method have been compared using XRD and thermal analysis. X-ray diffraction (XRD) shows the changes in the surface properties of organo-clays through expansion with surfactant loading. A polynomial relationship exists between the basal spacing and the CEC loading described by the equation y = 0.3232x2 + 0.2052x + 1.2834 with an R2 = 0.9955. Different arrangements of the surfactant molecules in the organo-clays are inferred from the changes in basal spacings. Paranitrophenol also causes the expansion of the montmorillonite clay and effects the arrangements of the surfactant molecules within the clay layers. Changes in the surfactant molecular arrangements were analysed by thermogravimetry. Additional thermal decomposition steps were observed when paranitrophenol is adsorbed on the organoclay.

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67 citations in Scopus
60 citations in Web of Science®
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ID Code: 6195
Item Type: Journal Article
Refereed: Yes
Additional Information: This paper is one of a series of papers on otganoclays the application of which is the adsorption of organic molecules from aqueous sytems
Keywords: montmorillonite, organo, clay, surfactant, high resolution thermogravimetric analysis, X, ray diffraction
DOI: 10.1016/j.jcis.2006.11.016
ISSN: 0021-9797
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2007 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 14 Feb 2007 00:00
Last Modified: 29 Feb 2012 13:37

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