Photocatalytic decolorization of Brilliant Golden Yellow in TiO2 and ZnO suspensions |
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| Authors: | Md Ahsan Habib Iqbal Mohmmad Ibrahim Ismail Abu Jafar Mahmood Md Rafique Ullah |
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| Institution: | 1. Department of Chemistry, Faculty of Science, University of Dhaka, Dhaka 1000, Bangladesh;2. Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh;3. Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia |
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| Abstract: | Photocatalytic decolorization of BGY, an anionic dye, has been investigated in TiO2 and ZnO aqueous dispersions under UV-light irradiation. Spectrum of the dye has been found unaffected in the pH range 4.21–11.30. Adsorption is a prerequisite for the metal oxide-mediated photodegradation/photodecolorization and the extent of decolorization has been discussed in terms of the Langmuir–Hinshelwood model. Complete decolorization was achieved in case of UV irradiation whereas degradation of BGY was found to be about ca.75%. ZnO-mediated decolorization has appeared to be better and faster. The effects of various parameters, such as catalyst loading, pH and initial concentration of the dye on decolorization have been investigated. |
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| Keywords: | Dye pollution Brilliant Golden Yellow Photocatalysts Decolorization |
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