Adsorption of Azo Dye Orange II by Supported TiO₂: A Review

Abstract:

The supported TiO₂ photocatalyst has been reported for the photodegradation of different organic pollutants. These supported TiO₂ photocatalysts include metal and non metal doped TiO₂ photocatalysts. The photodegradation can be explained in terms of adsorption. The adsorption of the dye is an significant and obvious parameter in the photodegradation process. The photodegradation is directly related to the adsorbed quantities of the pollutant onto the surface of adsorbant. Adsorption of Orange II, an azo dye has been reported using different adsorbents like fly ash, activated carbon and porous titanium dioxide. This review presents a comparison of maximum adsorption capacities (Q_m; mg.g^–1) and Langmuir adsorption constant (K_ads; L.mg^–1) for the adsorbents reported in previous studies.

• Periodical: Applied Mechanics and Materials (Volume 625)
• Pages: 770-774
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.625.770
• Online since: September 2014
• Authors: Nadia Riaz*, Mohammad Azmi Bustam, Chong Fai Kait, Zakaria B. Man, Muhammad Saqib Khan, Mohd Shariff Azmi, Biruh Shimekit, Sami Ullah, Ali E.I. Elkhalifah
• Keywords: Adsorption, Azo Dyes, Kinetic Modeling, Orange II, Photocatalysis

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