Sivalingam, G and Priya, MH and Madras, Giridhar (2004) Kinetics of the photodegradation of substituted phenols by solution combustion synthesized $TiO_2$. In: Applied Catalysis B: Environmental, 51 (1). pp. 67-76.
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A nano-sized, high surface area phase pure anatase $TiO_2$ synthesized by the solution combustion method was used to study the photocatalytic degradation of various chlorophenols and methylphenols. The photocatalytic degradation rates of o-chlorophenol, p-chlorophenol, dichlorophenol, trichlorophenol, pentachlorophenol, o- and m-methylphenol (cresol) under UV exposure were determined using the combustion synthesized $TiO_2$ and compared with the degradation rates with commercial Degussa P-25. The chlorophenols degraded much faster than the methylphenols, which degraded faster than phenol. The photocatalytic activity of combustion synthesized $TiO_2$ was significantly higher than that of Degussa P-25 under similar conditions. No intermediates were observed when combustion synthesized $TiO_2$ catalyst was used for the photocatalytic degradation of the phenols, while several intermediates were observed for the same reactions catalyzed by Degussa P-25. Because some of the intermediates are toxic, combustion synthesized $TiO_2$ may be more beneficial in environmental catalysis. The mechanisms for the photocatalytic degradation were proposed and the kinetic parameters were determined by regressing the experimental data.
|Item Type:||Journal Article|
|Additional Information:||The copyright belongs to Elsevier.|
|Keywords:||Solution combustion method;Substituted phenols;Photocatalytic degradation;Kinetic analysis|
|Department/Centre:||Division of Mechanical Sciences > Chemical Engineering|
|Date Deposited:||06 May 2006|
|Last Modified:||19 Sep 2010 04:26|
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