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Electrochemical monitoring of photoelectrocatalytic degradation of rhodamine B using TiO2 thin film modified graphite electrode

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Abstract

A commercially available TiO2 powder (Degussa P25) has been used to prepare thin films on graphite plates. The photoelectrochemical degradation of rhodamine B was investigated using this photoelectrode. The effects of applied potential, pH, and initial rhodamine B concentration on the photoelectrocatalytic (PEC) degradation of rhodamine B using ultraviolet illuminated TiO2/graphite (TiO2/C) thin film electrode were examined and discussed. Also, direct photolysis, electrochemical oxidation, photocatalytic, and PEC degradation of rhodamine B were compared. Results show that the best responses for PEC are obtained at applied potential of 1.2 V vs. reference electrode, pH 4.0, and initial rhodamine B concentration of 4.2 mg L−1.

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Authors and Affiliations

  1. Electroanalytical Chemistry Research Laboratory, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran

    Reza Ojani, Jahan-Bakhsh Raoof & Ebrahim Zarei

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  1. Reza Ojani
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  2. Jahan-Bakhsh Raoof
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  3. Ebrahim Zarei
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Correspondence to Reza Ojani.

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Ojani, R., Raoof, JB. & Zarei, E. Electrochemical monitoring of photoelectrocatalytic degradation of rhodamine B using TiO2 thin film modified graphite electrode. J Solid State Electrochem 16, 2143–2149 (2012). https://doi.org/10.1007/s10008-011-1634-y

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  • DOI: https://doi.org/10.1007/s10008-011-1634-y

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