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Pore structure of surfactant modified montmorillonites

He, Hongping, Zhu, Jianxi, Yuan, Peng, Zhou, Qin, Ma, Yuehong, & Frost, Ray L. (2008) Pore structure of surfactant modified montmorillonites. In Australasian Institute of Mining and Metallurgy Publications, Australasian Institute of Mining and Metallurgy, Brisbane, pp. 321-327.

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Abstract

A series of organoclays with different surfactant arrangements were prepared by ion exchange. The resulting organoclays were investigated using a combination of characterization techniques, including XRD, FTIR, TG and N2 adsorption-desorption. In the present study, the pores within the organoclays were discussed on the basis of the microstructural parameters, including BET-N2 surface area, pore volume, pore size, surfactant loading and distribution. The results show that both BET-N2 surface area and pore volume decrease from low to high packing density of the surfactant as the average pore size increases. Two basic organoclay models were proposed for hexadecyltrimethylammonium bromide (HDTMAB) modified montmorillonites: 1) the surfactant mainly occupied the clay interlayer and 2) both the clay interlayer space and external surface were modified by surfactant. This study demonstrates that the pore structure of the resulting organoclays has a significant influence on the sorption efficiency and mechanism of p-nitrophenol onto the organoclays.

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ID Code: 15618
Item Type: Conference Paper
Additional URLs:
Keywords: Organoclay, BET, N2 surface area, Pore size and volume, Sorption efficiency and mechanism
ISBN: 9781920806873
ISSN: 1324-6240
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)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200) > Bioinorganic Chemistry (030201)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Catalysis and Mechanisms of Reactions (030601)
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 Australasian Institute of Mining and Metallurgy
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 14 Nov 2008
Last Modified: 11 Aug 2011 04:39

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