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

被引:78
|
作者
Tekin, Derya [1 ]
Kiziltas, Hakan [2 ]
Ungan, Hande [2 ]
机构
[1] Ataturk Univ, Dept Met & Mat Engn, Erzurum, Turkey
[2] Ataturk Univ, Dept Chem Engn, Erzurum, Turkey
关键词
ZnO/TiO2 thin film photocatalyst; Photocatalytic activity; Network kinetic model; Dye degradation; Orange G; TIO2; NANOPARTICLES; PERFORMANCE; ZNO; LIGHT;
D O I
10.1016/j.molliq.2020.112905
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
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页数:6
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