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Photodegradation of phenol and cresol in aqueous medium by using Zn/Al + Fe mixed oxides obtained from layered double hydroxides materials

Authors
Journal
Catalysis Today
0920-5861
Publisher
Elsevier
Publication Date
Volume
150
Identifiers
DOI: 10.1016/j.cattod.2009.11.006
Keywords
  • Znalfe Layered Double Hydroxides
  • Ldhs Co-Precipitation
  • Phenol Photodegradation
  • P-Cresol Photodegradation
  • Energy Band Gap Ldhs

Abstract

Abstract ZnAlFe layered double hydroxides (LDHs) were synthesized by the co-precipitation method at different M II/M III ratio. The solids were calcined at 723 K obtaining the respective mixed oxides with high specific surface areas (138–70 m 2/g) and semiconductor properties (band gap values of 2.54–2.04 eV). The photocatalytic activity of these materials was tested for the photodegradation of aqueous solutions containing phenol and p-cresol (40 ppm), in presence of a UV light source. A disappearance of 98% of phenol and a total photodegradation of p-cresol were obtained after 6 and 4 h, respectively.

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