The effect of water on the performance of TiO2 in photocatalytic selective alkane oxidation

J.T. Carneiro, Joana T. Carneiro, Chieh-Chao Yang, Jacob A. Moulijn, Guido Mul

Research output: Contribution to journalArticleAcademicpeer-review

29 Citations (Scopus)

Abstract

Deactivation of TiO2 is hampering practical implementation of photocatalytic alternatives for energetically intensive selective oxidation processes. In the present study, humidification of the air stream is demonstrated to be a solution to this problem for well-defined photocatalysts, such as Solaronix TiO2, in selective oxidation of cyclohexane. Water establishes enhanced product desorption and stimulates decomposition of deactivating surface carboxylate species, as clearly demonstrated by ATR-FTIR spectroscopy. For high surface area TiO2, such as Hombikat UV100, water molecules adsorb too strongly, and addition of water vapor to the air stream is detrimental to catalyst performance.
Original languageEnglish
Pages (from-to)129-133
Number of pages4
JournalJournal of catalysis
Volume277
Issue number2
DOIs
Publication statusPublished - 2011

Keywords

  • IR-95298
  • METIS-280555

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