Photocatalytic degradation of Phenol, Catechol and Hydroquinone over Au-ZnO nanomaterials




phenolic compounds, photocatalysis, Au-ZnO


Au-ZnO nanomaterials were tested in photodegradation reactions performed under UV-Visible light; Phenol, Catechol and Hydroquinone were selected as target molecules, and it was found that Hydroquinone is the most sensitive molecule to be degraded under illumination. The Au addition significantly increases the photocatalytic activity of ZnO in the degradation of the phenolic compounds and the Au content is an important factor influencing the physicochemical properties of the nanomaterials synthesized and therefore the effectiveness of the photocatalytic treatment. The highest effectiveness in the phenolic compounds elimination was achieved by using ZnO modified by the addition of 2 wt.% of gold, this is due to the highest absorption of this material in the visible region of the electromagnetic spectrum. By HPLC analyzes, it was determined that the degradation route of the phenolic compounds depends on the photocatalyst employed in the catalytic reaction and on the substrate to be degraded, thus, Phenol degradation takes place by formation of more intermediate compounds than the observed in Catechol or Hydroquinone photodegradation.

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Author Biographies

Julie Joseane Murcia Mesa, Pedagogical and Technological University of Colombia

Catalysis Group, School of Chemical Sciences.

Jonny Alberto García Arias, Pedagogical and Technological University of Colombia

Catalysis Group, School of Chemical Sciences.

Hugo A. Rojas, Pedagogical and Technological University of Colombia

Catalysis Group, School of Chemical Sciences.

Oswaldo Eliecer Cárdenas Espinosa, Pedagogical and Technological University of Colombia

Group of Molecular Physical Chemistry and Computational Modeling QUIMOL, School of Chemical Sciences.


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How to Cite

Murcia Mesa, J. J., García Arias, J. A., Rojas, H. A., & Cárdenas Espinosa, O. E. (2020). Photocatalytic degradation of Phenol, Catechol and Hydroquinone over Au-ZnO nanomaterials. Revista Facultad De Ingeniería Universidad De Antioquia, (94), 24–32.

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