Photo-oxidation by singlet oxygen generated on nanoporous silicon in a LED-powered reactor

Alexei Lapkin, V M Boddu, G N Aliev, B Goller, S Polisski, D Kovalev

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

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%.
Original languageEnglish
Pages (from-to)331-336
Number of pages6
JournalChemical Engineering Journal
Volume136
Issue number2-3
DOIs
Publication statusPublished - 2008

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