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Synthesis and characterization of 1,2,3,4 tetrahydroquinoline intercalated into MoS2 in search of cleaner fuels

Published online by Cambridge University Press:  31 January 2011

Karina Castillo ,
Felicia Manciu ,
J.G. Parsons  and
Russell R. Chianelli
Karina Castillo*
Affiliation:
Department of Chemistry, University of Texas at El Paso, El Paso, Texas 79968
Felicia Manciu
Affiliation:
Department of Physics, University of Texas at El Paso, El Paso, Texas 79968
J.G. Parsons
Affiliation:
Department of Chemistry, University of Texas at El Paso, El Paso, Texas 79968
Russell R. Chianelli
Affiliation:
Department of Chemistry, University of Texas at El Paso, El Paso, Texas 79968
*
a)Address all correspondence to this author. e-mail: kcastillo2@utep.edu
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Abstract

Two different morphologies of MoS2 (short and long sheets) were utilized to elucidate the intercalation mechanism of 1,2,3,4 tetrahydroquinoline (THQ). MoS2 (short sheets) and molybdenite (MB) (long sheets) were exfoliated and restacked in the presence of THQ. The x-ray diffraction patterns of both samples show a new reflection in the 001 plane, which implies a lowering of symmetry and corresponds to an expansion of the layers by approximately 12.3 Å. In the MoS2-THQ sample, 80% of the MoS2 was intercalated and 20% remained stacked. In the MB-THQ sample, 30% of MB was intercalated while 70% remained stacked. X-ray absorption structure (XAS) studies showed changes in atomic geometry and coordination. The x-ray absorption near-edge spectra showed shifts in the geometry of the intercalated MoS2 and MB sample compared to the unintercalated samples. Extended x-ray absorption fine structure studies showed lower coordination numbers compared to the untreated samples. Infrared spectroscopy characterization of these same samples suggests intercalation and partial dehydrogenation of the THQ.

Keywords

CatalyticExtended x-ray absorption fine structure (EXAFS)Hydrogenation
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 10 , October 2007 , pp. 2747 - 2757
Copyright
Copyright © Materials Research Society 2007

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