Mineralization of Phenol Using Au/Ceo2-ZnO Photocatalysts

EasyChair Preprint no. 2172

Abstract

Photocatalytic materials of 1% supported Au in CeO2-ZnO were prepared by the wet impregnation method varying the zinc concentrations (0.5, 1.5 and 2.5% by weight); The supported metal was reduced at high temperature in a reducing atmosphere with hydrogen gas flow. The materials (ACZ) were characterized with the analytical techniques of X-ray Diffraction, Scanning Electron Microscopy with EDS detector, UV-Vis Diffuse Reflectance Spectroscopy and their textural properties were determined with N2 fisisorption. The photocatalytic activity of the materials was tested in the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) and methylene blue (AM), two organic pollutants that are present in wastewater. The degradation results were followed by UV-vis spectroscopy and by the determination of total organic carbon, demonstrating that they were effective by degrading more than 85 to 95% of the initial concentration of the contaminants from 240 min in the case of 2, 4-D and 180 min in the case of AM. In both cases the most active photocatalyst was ACZ1.5, due to its physicochemical properties. The impregnation of Au in the CeO2-ZnO supports markedly improved the activity of the supports.

Keyphrases: acid 24D, Au/CeO2-ZnO, methylene blue, Photodegradatión, physicochemical properties

@Booklet{EasyChair:2172,
  author = {Claudia Martínez Gómez and Gloria Alicia del Ángel and Israel Rangel-Vázquez and Ramón Zarraga Nuñez and Emmanuel Castillo Toxqui and Gustavo Rangel Porras},
  title = {Mineralization of Phenol Using Au/Ceo2-ZnO Photocatalysts},
  howpublished = {EasyChair Preprint no. 2172},

  year = {EasyChair, 2019}}