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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/4150

Title: Uranyl-anchored MCM-41 as a highly efficient photocatalyst in the oxidative destruction of short chain linear alkanes: An in situ FTIR study
Authors: KRISHNA, V
KAMBLE, VS
GUPTA, NM
SELVAM, P
Keywords: selective photooxidation
catalytic-oxidation
molecular-sieves
oxide catalysts
mesoporous mcm-41
light alkanes
copper-oxide
metal-oxide
methane
ethane
Issue Date: 2008
Publisher: AMER CHEMICAL SOC
Citation: JOURNAL OF PHYSICAL CHEMISTRY C, 112(40), 15832-15843
Abstract: Uranyl ions anchored in the mesopores of MCM-41 molecular sieve were found to be a highly efficient heterogeneous photocatalyst in the complete degradation of short chain linear alkanes such as methane, ethane, propane, and butane, carried out under ambient conditions of light irradiation. In addition to the formation of carbon dioxide and water, a negligible amount of methane was detected during the photooxidation of ethane, propane, and butane. Further, small amounts of ethane were also obtained during photooxidation of butane, suggesting quenching of *UO22+ by a C-C bond cleavage, in addition to a hydrogen atom abstraction. An C, in situ Fourier transform IR spectroscopy analysis was employed in order to monitor the photooxidation of methane and ethane over *UO22+/MCM-41, where formic acid, formaldehyde, and formate species were the transient species identified from methane, and acetic acid, acetaldehyde, and acetate species were the intermediates obtained from ethane. Appropriate reaction pathways were proposed based on the formation of these species (C-H cleavage) and also from the negligible quantitites of methane and ethane obtained during photooxidation of higher alkanes (C-C cleavage).
URI: http://dx.doi.org/10.1021/jp802779e
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4150
http://hdl.handle.net/10054/4150
ISSN: 1932-7447
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