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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

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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
Divisions: Faculty of Science > 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:
DateEvent
1 March 2008Published
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)

Data sourced from Thomson Reuters' Web of Knowledge

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