Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination

Oluwatosin Tokode, Radhakrishna Prabhu, Linda A. Lawton, Peter K. J. Robertson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
309 Downloads (Pure)

Abstract

Quantum yields of the photocatalytic degradation of methyl orange under controlled periodic illumination (CPI) have been modelled using existing models. A modified Langmuir-Hinshelwood (L-H) rate equation was used to predict the degradation reaction rates of methyl orange at various duty cycles and a simple photocatalytic model was applied in modelling quantum yield enhancement of the photocatalytic process due to the CPI effect. A good agreement between the modelled and experimental data was observed for quantum yield modelling. The modified L-H model, however, did not accurately predict the photocatalytic decomposition of the dye under periodic illumination.
Original languageEnglish
Pages (from-to)398-403
Number of pages6
JournalApplied Catalysis B: Environmental
Volume156-157
Early online date30 Mar 2014
DOIs
Publication statusPublished - Sep 2014

Keywords

  • Photocatalysis
  • Titanium dioxide
  • Quantum yield
  • Langmuir-Hinshelwood
  • Mathematical model
  • RELATIVE PHOTONIC EFFICIENCIES
  • PHASE PHOTOCATALYZED REACTIONS
  • HETEROGENEOUS PHOTOCATALYSIS
  • SEMICONDUCTOR PHOTOCATALYSIS
  • LIGHT-INTENSITY
  • KINETICS
  • DEGRADATION
  • PHOTOEFFICIENCY
  • DESTRUCTION
  • ADSORPTION

Cite this