Photocatalytic degradation of basic and reactive dyes in both single and binary systems using immobilized TiO2


  • Siew Teng Ong
  • Chnoong Kheng Lee
  • Zulkarnain Zainal
  • Pei Sin Keng
  • Sie Tiong Ha



TiO2, Immobilization, Basic dyes, Reactive dyes, Binary dyes, Photocatalytic degradation


In order to avoid the separation process of fine titanium dioxide (TiO2) photocatalyst at the end of the treatment, a simple and effective method was explored to immobilize TiO2 nanoparticles on a support material. In this paper, the effectiveness of using immobilized TiO2 supported on glass plates to remove Basic Blue 3 (BB3) and Reactive Orange (RO16) from single and binary dye solutions was investigated. The photocatalytic degradation of both dyes was investigated under the illumination of either UV or sunlight. The percentage of dye removal increased with increasing irradiation time and the maximum number of dip coatings that can be applied was ten. For all the dye solutions studied, the percentage of dye removal decreased with increasing number of usage of immobilized TiO2. Due to the ease of usage and good photocatalytic efficiency, the findings showed the potential application in decolouring organic dyes for pollution prevention.


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