A Comparative study on the photocatalytic degradation of industrial dyes using modified commercial and synthesized TiO2 photocatalysts

Authors

  • Mohammed Mastabur Rahman Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet-3114
  • Fatema Akthar Choudhury Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet-3114
  • Md Delowar Hossain Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet-3114
  • Md Namwarul Islam Chowdhury Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet-3114
  • Sadia Mohsin Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet-3114
  • Md Mehdi Hasan Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet-3114
  • Md Fakar Uddin Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet-3114
  • Niloy Chandra Sarker Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet-3114

DOI:

https://doi.org/10.3329/jce.v27i2.17805

Keywords:

Titanium di oxide, Sol-gel method, Industrial dyes, Calcination temperature, Doping agents, Activated charcoal, Kinetic model

Abstract

Commercial and Synthesized titanium di oxide (TiO2) prepared by conventional sol-gel method, are modified to degrade industrial dyes. Modification is done on bare TiO2 and TiO2 doped with various doping agents (activated charcoal/silicon dioxide/zinc oxide), followed by thermal treatments. The role of thermal treatments and doping effects on the efficiency of TiO2 photocatalysts are highlighted and evaluated by decoloration of Methylene Blue in aqueous solution under UV and Visible light irradiation for both systems. The results revealed that increase in calcination temperature up to optimum level enhances the photocatalytic activities of the samples and doping narrows the band gap and makes the samples visible light responsive. This study also showed that activated charcoal (AC) doped TiO2 photocatalyst is a promising one under Visible light and is thus used to degrade other dyes such as Crystal Violet and Rhodamine B. The obtained experimental data are used to study four different kinetic models: Zero order, Pseudo first order, Parabolic diffusion and Modified Freundlich model. The best fit of the experimental data are obtained by Pseudo first order and Modified Freundlich models.

DOI: http://dx.doi.org/10.3329/jce.v27i2.17805

Journal of Chemical Engineering, IEB Vol. ChE. 27, No. 2, December 2012: 65-71

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Published

2014-01-29

How to Cite

Rahman, M. M., Choudhury, F. A., Hossain, M. D., Chowdhury, M. N. I., Mohsin, S., Hasan, M. M., Uddin, M. F., & Sarker, N. C. (2014). A Comparative study on the photocatalytic degradation of industrial dyes using modified commercial and synthesized TiO2 photocatalysts. Journal of Chemical Engineering, 27(2), 65–71. https://doi.org/10.3329/jce.v27i2.17805

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