Partial photocatalytic oxidation of glycerol in TiO2 water suspensions

V. Augugliaro, H. A.Hamed El Nazer, V. Loddo, A. Mele, G. Palmisano, L. Palmisano, S. Yurdakal

Research output: Contribution to journalArticlepeer-review

100 Scopus citations

Abstract

The photo-oxidation of glycerol in aqueous suspensions containing commercial and home-prepared TiO2 samples in the anatase, rutile or anatase-rutile polymorphic phases was investigated by using two different batch photoreactors, an annular photoreactor and a cylindrical photoreactor. The glycerol oxidation products detected in the aqueous phase were: 1,3-dihydroxyacetone, glyceraldehyde, formic acid and carbon dioxide. Two unknown compounds were also detected by electrospray ionization mass spectrometry as peaks at m/z 268 and m/z 176. A plausible mechanism for their formation was suggested based on ESI-MS and MSn experiments. The results indicate that in both systems the commercial samples showed the best performances both for reaction rate and selectivity toward 1,3-dihydroxyacetone, glyceraldehyde, formic acid and CO2.

Original languageBritish English
Pages (from-to)21-28
Number of pages8
JournalCatalysis Today
Volume151
Issue number1-2
DOIs
StatePublished - 15 Apr 2010

Keywords

  • Glycerol partial oxidation
  • Reaction pathways
  • Selective photocatalytic oxidation
  • Titanium dioxide

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