Characterization of TiO(2)-chitosan/glass photocatalyst for the removal of a monoazo dye via photodegradation-adsorption process

J Hazard Mater. 2009 May 15;164(1):138-45. doi: 10.1016/j.jhazmat.2008.07.154. Epub 2008 Aug 13.

Abstract

In this paper, the newly explored TiO(2)-Chitosan/Glass was suggested as a promising alternative material to conventional means of wastewater treatment. Characterization of TiO(2)-Chitosan/Glass photocatalyst was studied with SEM-EDX, XRD, and Fourier transform infrared spectroscopy (FTIR) analysis. The combination effect of photodegradation-adsorption process for the removal of methyl orange (MO), an acid dye of the monoazo series occur promisingly when four layers of TiO(2)-Chitosan/Glass photocatalyst was used for MO removal. Approximately, 87.0% of total MO removal was achieved. The reactive -NH(2), -OH, and metal oxide contents in the prepared photocatalyst responsible for the photodegradation-adsorption effect were confirmed by FTIR study. Similarly, MO removal behavior was well supported by SEM-EDX and XRD analysis. Significant dependence of MO removal on the TiO(2)-Chitosan loading can be explained in terms of relationship between quantum yield of photocatalytic reactions and photocatalyst structure/activity. Hence, the research work done thus far suggests a new method, having both the advantages of photodegradation-adsorption process in the abatement of various wastewater pollutants.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adsorption
  • Azo Compounds / isolation & purification*
  • Catalysis
  • Chitosan / chemistry*
  • Coloring Agents / isolation & purification*
  • Glass / chemistry*
  • Hydrogen-Ion Concentration
  • Photochemistry / methods*
  • Spectroscopy, Fourier Transform Infrared
  • Titanium / chemistry*
  • Water Purification / methods*

Substances

  • Azo Compounds
  • Coloring Agents
  • titanium dioxide
  • methyl orange
  • Chitosan
  • Titanium