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Photo-oxidation by singlet oxygen generated on nanoporous silicon in a LED-powered reactor
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Lapkin, Alexei, Boddu, Veera, Aliev, Gazi N., Goller, Bernhard, Polisski, Sergej and Kovalev, Dmitry (2008) Photo-oxidation by singlet oxygen generated on nanoporous silicon in a LED-powered reactor. Chemical Engineering Journal, Vol.136 (No.2-3). pp. 331-336. doi:10.1016/j.cej.2007.04.013
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Official URL: http://dx.doi.org/10.1016/j.cej.2007.04.013
Abstract
An annular flow photochemical reactor illuminated by UV and green (524 nm) light emitting diodes (LEDs) was characterised by a chemical actinometer. Very high efficiency of absorption of photons, most likely promoted by the specific orientation of LED elements in the reactor, was calculated based on the measured actinometry results. Generation of singlet oxygen mediated by nanoporous silicon under illumination by Ar+ laser, UV and green LEDs was demonstrated by indirect measurement of suppression of porous Si photoluminescence, and by direct measurements of singlet oxygen luminescence. The efficiency of reactor in singlet oxygen mediated reactions was tested using reaction of decomposition of diphenylbenzofuran. Estimated quantum yield of chemical reaction is about 34%.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Library of Congress Subject Headings (LCSH): | Silicon, Active oxygen, Photochemistry, Light emitting diodes | ||||
| Journal or Publication Title: | Chemical Engineering Journal | ||||
| Publisher: | Elsevier BV | ||||
| ISSN: | 1385-8947 | ||||
| Official Date: | 1 March 2008 | ||||
| Dates: |
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| Volume: | Vol.136 | ||||
| Number: | No.2-3 | ||||
| Number of Pages: | 6 | ||||
| Page Range: | pp. 331-336 | ||||
| DOI: | 10.1016/j.cej.2007.04.013 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), University of Bath, European Commission (EC) | ||||
| Grant number: | EP/D000564 (EPSRC), EP/E012183 (EPSRC), STRP 013875 (EC) |
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