Decolorization of p-dimethylaminobenzal-rhodanine under photocatalytic process by use of titanium dioxide nanoparticles at various buffer phs

Morteza Montazerozohori, Sayed Amin Hoseinipour

Department of Chemistry, Yasouj University, Yasouj, 7591874831 Iran

Abstract


This paper presents the decolorization of p-Dimethylaminobenzalrhodanine using titanium dioxide nano-particles under photocatalytic process at various buffer media under air atmosphere. Several effective agents including nano-photocatalyst loading, illumination time, pH of medium and initial dye concentrations have been subjected to be estimated. Furthermore, kinetic investigations of photocatalytic process fitted the pseudo-first-order kinetic for dye decolorization at all considered buffer media. Then Langmuir-Hinshelwood model was applied for evaluation of photodecolorization rate constant (kr) and adsorption constant KA for all media. Spectrophotometric monitoring showed that the titled dye is nearly decolorized completely after 9-15 h and 3.5 h at buffer pHs of 9-12 and pH of 13 under high pressure irradiation respectively.

Keywords


decolorization; nano-particle; photocatalytic; p-Dimethylaminobenzal-rhodanine; titanium dioxide

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