Journal of Industrial and Engineering Chemistry

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A study on deactivation and regeneration of titanium dioxide during photocatalytic degradation of phthalic acid

  • Gandhi, Vimal G. (Department of Chemical Engineering & Shah-Schulman Center for Surface Science and Nanotechnology, Faculty of Technology, Dharmsinh Desai University) ;
  • Mishra, Manish Kumar (Department of Chemical Engineering & Shah-Schulman Center for Surface Science and Nanotechnology, Faculty of Technology, Dharmsinh Desai University) ;
  • Joshi, Pradyuman A. (Department of Chemical Engineering & Shah-Schulman Center for Surface Science and Nanotechnology, Faculty of Technology, Dharmsinh Desai University)
  • Published : 2012.11.25
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Abstract

The cause of deactivation of Degussa P25 titanium dioxide ($TiO_2$) during photocatalytic degradation of phthalic acid in aqueous medium was investigated. Various regeneration methods, such as washing with solvents, hydrogen peroxide ($H_2O_2$) and thermal treatment were attempted to find the best technique for regeneration of spent catalyst. The deactivation and regeneration of $TiO_2$ was monitored using XRD, FTIR, CHNO analysis, zeta potential measurement and surface area analysis. The surface adsorption of phthalic acid and the reaction intermediates deactivates the catalyst. The regeneration by $H_2O_2$ treatment nearly restored the activity, whereas washing with solvents and thermal treatment showed poor regeneration.

Keywords

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