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Changes in the surfaces on DDOAB organoclays adsorbed with paranitrophenol—An XRD, TEM and TG study

Zhou, Qin, He, Hongping, Frost, Ray L., & Xi, Yunfei (2008) Changes in the surfaces on DDOAB organoclays adsorbed with paranitrophenol—An XRD, TEM and TG study. Materials Research Bulletin, 43(12), pp. 3318-3326.

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Abstract

The adsorption of paranitrophenol on organoclays synthesised by the ion exchange of the surfactant molecule dimethyldioctadecylammonium bromide (DDOAB) of formula (CH3(CH2)17)2NBr(CH3)2 has been studied by X-ray diffraction, transmission electron microscopy and thermogravimetric analysis. The expansion of the montmorillonite depends on the loading of the montmorillonite with dimethyldioctadecylammonium bromide and is related to the arrangement of the surfactant molecules within the clay interlayer. This expansion is altered by the adsorbed paranitrophenol and is observed in the transmission electron microscopic images of the organoclay with adsorbed paranitrophenol. Changes in the surfactant molecular arrangements were analysed by thermogravimetry. The paranitrophenol is sublimed simultaneously with the loss of surfactant. The dehydroxylation temperature of the montmorillonite is decreased upon adsorption of the paranitrophenol indicating a bonding between the paranitrophenol and the hydroxyl units of the montmorillonite.

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ID Code: 15312
Item Type: Journal Article
Keywords: montmorillonite, organo, clay, surfactant, high resolution thermogravimetric analysis, X, ray diffraction, transmission electron microscopy
DOI: 10.1016/j.materresbull.2008.02.015
ISSN: 0025-5408
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2008 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 27 Oct 2008
Last Modified: 29 Feb 2012 23:48

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