Photocatalytic degradation of AZO dyes by supported TiO2 + UV in aqueous solution

Chemosphere. 2000 Aug;41(3):303-9. doi: 10.1016/s0045-6535(99)00487-7.

Abstract

The photocatalytic degradation performance of photocatalysts TiO2 supported on 13-X, Na-Y, 4A zeolites with different loading content was evaluated using the photocatalytic oxidation of dyes direct fast scarlet 4BS and acid red 3B in aqueous medium. The results showed that the best reaction dosage of TiO2-zeolite catalysts is about 2 g/l and the photocatalytic kinetics follows first order for all supported catalysts. The photocatalytic activity order of the three series catalysts is 13X type >Y type >4A type. The physical state of titanium dioxide on the supports is evaluated by X-ray photoelectron spectra (XPS), powder X-ray diffraction (XRD), BET, and FTIR.

MeSH terms

  • Azo Compounds / chemistry*
  • Azo Compounds / radiation effects
  • Catalysis
  • Coloring Agents / chemistry*
  • Coloring Agents / radiation effects
  • Humans
  • Industrial Waste*
  • Photochemistry
  • Solutions
  • Titanium / chemistry*
  • Ultraviolet Rays*
  • Water
  • Water Pollutants, Chemical*
  • Zeolites / chemistry

Substances

  • Azo Compounds
  • Coloring Agents
  • Industrial Waste
  • Solutions
  • Water Pollutants, Chemical
  • Water
  • Zeolites
  • titanium dioxide
  • Titanium