Uranyl-anchored MCM-41 as a highly efficient photocatalyst in the oxidative destruction of short chain linear alkanes: An in situ FTIR study
DSpace at IIT Bombay
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Title |
Uranyl-anchored MCM-41 as a highly efficient photocatalyst in the oxidative destruction of short chain linear alkanes: An in situ FTIR study
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Creator |
KRISHNA, V
KAMBLE, VS GUPTA, NM SELVAM, P |
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Subject |
selective photooxidation
catalytic-oxidation molecular-sieves oxide catalysts mesoporous mcm-41 light alkanes copper-oxide metal-oxide methane ethane |
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Description |
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).
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Publisher |
AMER CHEMICAL SOC
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Date |
2011-07-15T04:13:48Z
2011-12-26T12:49:14Z 2011-12-27T05:35:03Z 2011-07-15T04:13:48Z 2011-12-26T12:49:14Z 2011-12-27T05:35:03Z 2008 |
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Type |
Article
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Identifier |
JOURNAL OF PHYSICAL CHEMISTRY C, 112(40), 15832-15843
1932-7447 http://dx.doi.org/10.1021/jp802779e http://dspace.library.iitb.ac.in/xmlui/handle/10054/4150 http://hdl.handle.net/10054/4150 |
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Language |
en
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