Reaction Kinetics, Mechanisms and Catalysis

, Volume 99, Issue 1, pp 201–208 | Cite as

Photocatalytic decolorization kinetics of diazo dye Congo Red aqueous solution by UV/TiO2 nanoparticles



The efficiency of color removal from aqueous Congo Red dye (CR) solution has been investigated in TiO2 suspensions irradiated with artificial UV light. Batch photocatalytic tests were carried out by varying the amount of TiO2 and the irradiation time using the same initial CR concentration. The experimental results indicated that the decolorization rate follows pseudo first-order kinetics with respect to CR concentration. The doses of TiO2 were 0.25, 0.5 and 1.0 g L−1 and the wavelength of incident ultraviolet light was predominantly 254 nm. CR adsorption on the surface of TiO2 is also investigated and described.


Photocatalytic decolorization kinetics UV radiation TiO2 Congo Red dye Adsorption 



This study was supported by Ministry of Science, Education and Sports of Republic of Croatia within the framework of the Projects no. 120-1253092-30 and 120-1201833-1789:10106-797300-1.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  • Lidija Ćurković
    • 1
  • Davor Ljubas
    • 1
  • Hrvoje Juretić
    • 1
  1. 1.Faculty of Mechanical Engineering and Naval ArchitectureUniversity of ZagrebZagrebCroatia

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