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Changes in the surfaces of adsorbed p-nitrophenol on methyltrioctadecylammonium bromide organoclay -an XRD, TG and infrared spectroscopic study

Frost, Ray L., Zhou, Qin, He, Hongping, & Xi, Yunfei (2007) Changes in the surfaces of adsorbed p-nitrophenol on methyltrioctadecylammonium bromide organoclay -an XRD, TG and infrared spectroscopic study. Journal of Colloid and Interface Science, 314(2), pp. 405-414.

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Abstract

Water purification is of extreme importance worldwide. P-nitrophenol was used as a test chemical to design and test an organoclay for the removal of p-nitrophenol from an aqueous solution. Synthesis of the organoclay with methyltrioctadecylammonium bromide [CH3(CH2)17]3NBr(CH3) labeled as MTOAB results in multiple expansions of the montmorillonite clay from 1.24 nm to a maximum of 5.20 nm as is evidenced by the XRD patterns. Thermal analysis shows strong bonding of the surfactant to the clay siloxane layers and the interaction of the p-nitrophenol with the clay surfaces. It is proposed that the p-nitrophenol penetrates the siloxane layer of the clay and bonds through the ditrigonal space of the siloxane hexagonal units to the inner OH units. Such a concept is supported by the observation of an additional infrared bands at 3652 cm-1 for the organoclay. Shifts in the p-nitrophenol OH stretching vibrations mean a strong interaction of the p-nitrophenol molecule. Significant changes in the siloxane stretching bands are also observed.

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ID Code: 9164
Item Type: Journal Article
Additional Information: The purification of water is extremely important. The application of organoclays for the removal of organic impurities of water is extremely likely.
Keywords: montmorillonite, organoclay, surfactant, differential thermal analysis, thermogravimetric analysis, X, ray diffraction, infrared spectroscopy
DOI: 10.1016/j.jcis.2007.06.011
ISSN: 0021-9797
Subjects: 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) > 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
Current > Research Centres > Science Research Centre
Copyright Owner: Copyright 2007 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 27 Aug 2007
Last Modified: 29 Feb 2012 23:36

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