Photocatalytic degradation of 4-chlorophenol: A mechanistically-based model

U. Stafford, K. A. Gray*, P. V. Kamat

*Corresponding author for this work

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

The photocatalytic degradation of 4-CP was mathematically modelled using the mechanistic insights and data presented in an earlier study [1]. The solution and surface concentrations of reacting species were calculated by solving a system of differential equations that account for oxidation reactions of dissolved and adsorbed species, adsorption and desorption, reduction of oxygen, and hole-electron recombination. The differential equations were integrated over discrete time-periods and annular regions of the photoreactor. The resulting model predicts the trends observed in studies in other laboratories using different experimental apparati. Using the model it is possible to predict effects of reactor geometry, TiO2 loading, light intensity, and mixing on the course of TiO2 photocatalytic oxidation. The model verifies the importance of surface reactions, and reveals the need to better understand the fate and role of oxygen in TiO2 photocatalytic systems.

Original languageEnglish (US)
Pages (from-to)355-388
Number of pages34
JournalResearch on Chemical Intermediates
Volume23
Issue number4
DOIs
StatePublished - Jan 1 1997

ASJC Scopus subject areas

  • Chemistry(all)

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