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Significant enhancement of photocatalytic activity over bifunctional ZnO-TiO₂ catalysts for 4-chlorophenol degradation.
Chemosphere. 2014 Jun; 105:152-9.C

Abstract

In this study, ZnO-TiO₂ binary oxide catalysts were successfully prepared by a solid-state dispersion. The catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, diffuse reflectance spectroscopy, transmission electron microscopy, Brunauer-Emmett-Teller and photoluminescence techniques. It was observed that the interaction between ZnO and TiO₂ affected the photocatalytic efficiency of binary oxide catalysts. 20 wt% ZnO-TiO₂ photocatalyst exhibited much higher photocatalytic activity than pure TiO₂, ZnO and P-25 in the degradation of 4-chlorophenol under low UV irradiation. The chemical interaction between ZnO and TiO₂ in the form of the Zn-O-Ti- bond may affect the photoefficiency of binary oxide catalysts. The profound effect of binary oxide catalyst for 4-chlorophenol degradation was generally considered due to small particle size, lower band gap energy and the presence of more surface OH groups than that of the pure TiO₂ and ZnO photocatalyst. It was concluded that in the case of 20 wt% ZnO-TiO₂ catalyst, the main intermediates of degradation were phenol, 2-chlorophenol, hydroquinone and catechol, while with P-25 the main intermediates were ring-opening products, suggesting that different reaction mechanisms may have taken place depending on the nature of the catalyst.

Authors+Show Affiliations

Istanbul University, Faculty of Engineering, Chemical Engineering Department, Avcilar, 34320 Istanbul, Turkey. Electronic address: gpozan@istanbul.edu.tr.Istanbul University, Faculty of Engineering, Chemical Engineering Department, Avcilar, 34320 Istanbul, Turkey.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24525258

Citation

Pozan, Gulin Selda, and Ayca Kambur. "Significant Enhancement of Photocatalytic Activity Over Bifunctional ZnO-TiO₂ Catalysts for 4-chlorophenol Degradation." Chemosphere, vol. 105, 2014, pp. 152-9.
Pozan GS, Kambur A. Significant enhancement of photocatalytic activity over bifunctional ZnO-TiO₂ catalysts for 4-chlorophenol degradation. Chemosphere. 2014;105:152-9.
Pozan, G. S., & Kambur, A. (2014). Significant enhancement of photocatalytic activity over bifunctional ZnO-TiO₂ catalysts for 4-chlorophenol degradation. Chemosphere, 105, 152-9. https://doi.org/10.1016/j.chemosphere.2014.01.022
Pozan GS, Kambur A. Significant Enhancement of Photocatalytic Activity Over Bifunctional ZnO-TiO₂ Catalysts for 4-chlorophenol Degradation. Chemosphere. 2014;105:152-9. PubMed PMID: 24525258.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Significant enhancement of photocatalytic activity over bifunctional ZnO-TiO₂ catalysts for 4-chlorophenol degradation. AU - Pozan,Gulin Selda, AU - Kambur,Ayca, Y1 - 2014/02/10/ PY - 2013/05/16/received PY - 2014/01/16/revised PY - 2014/01/17/accepted PY - 2014/2/15/entrez PY - 2014/2/15/pubmed PY - 2014/9/23/medline KW - 4-Chlorophenol KW - Characterization KW - Photocatalytic degradation KW - UV irradiation KW - ZnO–TiO(2) SP - 152 EP - 9 JF - Chemosphere JO - Chemosphere VL - 105 N2 - In this study, ZnO-TiO₂ binary oxide catalysts were successfully prepared by a solid-state dispersion. The catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, diffuse reflectance spectroscopy, transmission electron microscopy, Brunauer-Emmett-Teller and photoluminescence techniques. It was observed that the interaction between ZnO and TiO₂ affected the photocatalytic efficiency of binary oxide catalysts. 20 wt% ZnO-TiO₂ photocatalyst exhibited much higher photocatalytic activity than pure TiO₂, ZnO and P-25 in the degradation of 4-chlorophenol under low UV irradiation. The chemical interaction between ZnO and TiO₂ in the form of the Zn-O-Ti- bond may affect the photoefficiency of binary oxide catalysts. The profound effect of binary oxide catalyst for 4-chlorophenol degradation was generally considered due to small particle size, lower band gap energy and the presence of more surface OH groups than that of the pure TiO₂ and ZnO photocatalyst. It was concluded that in the case of 20 wt% ZnO-TiO₂ catalyst, the main intermediates of degradation were phenol, 2-chlorophenol, hydroquinone and catechol, while with P-25 the main intermediates were ring-opening products, suggesting that different reaction mechanisms may have taken place depending on the nature of the catalyst. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/24525258/Significant_enhancement_of_photocatalytic_activity_over_bifunctional_ZnO_TiO₂_catalysts_for_4_chlorophenol_degradation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(14)00088-5 DB - PRIME DP - Unbound Medicine ER -