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

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

Authors

Oluwatosin Tokode

Peter K.J. Robertson



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.

Citation

TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2014. Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination. Applied catalysis B: environmental [online], 156-157, pages 398-403. Available from: https://doi.org/10.1016/j.apcatb.2014.03.046

Journal Article Type Article
Acceptance Date Mar 22, 2014
Online Publication Date Mar 30, 2014
Publication Date Sep 1, 2014
Deposit Date Sep 16, 2016
Publicly Available Date Mar 28, 2024
Journal Applied catalysis B: environmental
Print ISSN 0926-3373
Electronic ISSN 1873-3883
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 156-157
Pages 398-403
DOI https://doi.org/10.1016/j.apcatb.2014.03.046
Keywords Photocatalysis; Titanium dioxide; Quantum yield; Langmuir Hinshelwood; Mathematical model
Public URL http://hdl.handle.net/10059/1725

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