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

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Tekin D., Kızıltaş H., Ungan H.

JOURNAL OF MOLECULAR LIQUIDS, cilt.306, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 306
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.molliq.2020.112905
  • Dergi Adı: JOURNAL OF MOLECULAR LIQUIDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Anahtar Kelimeler: ZnO/TiO2 thin film photocatalyst, Photocatalytic activity, Network kinetic model, Dye degradation, Orange G, TIO2, NANOPARTICLES, PERFORMANCE, ZNO, LIGHT
  • Atatürk Üniversitesi Adresli: Evet

Özet

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.