Kinetic evaluation of ZnO/TiO2 thin film photocatalyst in photocatalytic degradation of Orange G


TEKİN D., KIZILTAŞ H., UNGAN H.

JOURNAL OF MOLECULAR LIQUIDS, vol.306, 2020 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 306
  • Publication Date: 2020
  • Doi Number: 10.1016/j.molliq.2020.112905
  • Journal Name: JOURNAL OF MOLECULAR LIQUIDS
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC

Abstract

The ZnO/TiO2 solution of the thin-film photocatalyst was prepared by using the sol-gel method. The prepared solution was coated on a quartz plate by using the dip-coating method. For the characterization of synthesized ZnO/TiO2 photocatalyst, SEM-EDS, XRD and chronoamperometty measurements were used. To determine photocatalytic activity and kinetic model studies, the degradation of Orange G dye which is frequently used in the textile industry on ZnO/TiO2 photocatalyst was investigated. Using the results of kinetic experiments by examining the effects of different initial dye concentrations, temperature and light intensities, the degradation of Orange G dye on ZnO/TiO2 photocatalyst was found to be in accordance with the Network Kinetic Model, and the calculated equilibrium constant and activation energies of the ZnO/TiO2 thin film photocatalyst arc 20.02 and 16.16 kJ/mol, respectively. (C) 2020 Elsevier B.V. All rights reserved.