Effect of the sol-gel conditions on the morphology and SCR performance of electrospun V-W-TiO2 catalysts

Debora Marani*, Rafael Hubert Silva, Apiwat Dankeaw, Mads Gudik-Sørensen, Kion Norrman, Vincenzo Esposito

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

V-W-TiO2 catalysts are prepared as nanofibers for the removal of the NOx in exhausts via the NH3 Selective Catalytic Reduction (SCR) method. By combining electrospinning and soft chemistry, materials are processed as nanofibers with the catalytic components (e. g. V2O5-WO3) incorporated as dopants into the supporting anatase phase (e. g TiO2). The conditions for the chemical synthesis were investigated by varying the molar ratios between titanium alkoxide (tetraisopropoxide) and the chelating agent (acetic acid). Catalytic characterization clearly shows a impact of the starting precursor coordination on the final nanostructure, and thus on the catalytic performances. Superior NOx conversion are obtained for nanofibers formed by high coordination level, i.e. [Acetic acid]/[Ti cation] > 2, with high stability and control over the processing route.
Original languageEnglish
JournalJournal of Physics and Chemistry of Solids
Volume118
Pages (from-to)255-261
ISSN0022-3697
DOIs
Publication statusPublished - 2018

Keywords

  • Nanofibers
  • Electrospinning
  • Titania
  • SCR

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