Adsorption Behavior of the Primary, Secondary and Tertiary Alkyl, Allyl and Aryl Alcohols Over Nanoscale (1 0 0) Surface of γ-Alumina

Zamani, Mehdi; Dabbagh, Hossein A.

doi:10.22034/jna.2014.01.004

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	Adsorption Behavior of the Primary, Secondary and Tertiary Alkyl, Allyl and Aryl Alcohols Over Nanoscale (1 0 0) Surface of γ-Alumina
Article 4, Volume 1, Issue 1, Spring 2014, Page 21-30 PDF (1 MB)
DOI: 10.22034/jna.2014.01.004
Authors
Mehdi Zamani ¹^{, 2}; Hossein A. Dabbagh²
¹Department of Chemistry, Malek-ashtar University of Technology, Shahin-shahr P.O. Box 83145/115, Islamic Republic of Iran
²Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran
Abstract
In this study, the adsorption behavior of the primary, secondary and tertiary alcohols over nanoscale (1 0 0) surface of defect spinel γ-alumina was investigated with the aid of density functional theory (DFT) at BLYP/DNP level of calculation. The influence of different substituents including alkyl, cycloalkyl, allyl and aryl were analyzed for free and adsorbed alcohols to shed light the adsorption selectivity of these compounds over γ-alumina surface. These results indicate that more branches at a position of alcohol favor the adsorption, while a decrease in adsorption energy is achieved for the alcohols containing the substituents at the β position. The tertiary alcohols are adsorbed over the surface stronger than secondary and primary alcohols. Alcohols with larger alkyl chains have greater adsorption energies. Also the aryl alcohols are adsorbed over the surface better than the alkyl and allyl moieties.
Keywords
γ-Alumina; Alcohol; Molecular adsorption; DFT


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