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Near infrared spectroscopy of stearic acid adsorbed on montmorillonite

Lu, Longfei, Cai, Jingong , & Frost, Ray L. (2010) Near infrared spectroscopy of stearic acid adsorbed on montmorillonite. Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 75(3), pp. 960-963.

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Abstract

The adsorption of stearic acid on both sodium montmorillonites and calcium montmorillonites has been studied by near infrared spectroscopy complimented with infrared spectroscopy. Upon adsorption of stearic acid on Ca-Mt additional near infrared bands are observed at 8236 cm-1 and is assigned to an interaction of stearic acid with the water of hydration. Upon adsorption of the stearic acid on Na-Mt, the NIR bands are now observed at 5671, 5778, 5848 and 5912 cm-1 and are assigned to the overtone and combination bands of the CH fundamentals. Additional bands at 4177, 4250, 4324, 4337, 4689 and 4809 cm-1 are attributed to CH combination bands resulting from the adsorption of the stearic acid. Stearic acid is used as a model molecule for adsorption studies. The application of near infrared spectroscopy to the study of this adsorption proved most useful.

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12 citations in Scopus
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9 citations in Web of Science®

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ID Code: 30986
Item Type: Journal Article
Keywords: montmorillonites, stearicacid, Near infrared spectroscopy, adsorption, structured water
DOI: 10.1016/j.saa.2009.12.001
ISSN: 1386-1425
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) > Colloid and Surface Chemistry (030603)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2010 Elsevier BV
Deposited On: 18 Feb 2010 07:53
Last Modified: 01 Mar 2012 00:23

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