Title of article :
Enhancement of TiO2-photocatalyzed organic transformation by ZnO and ZnS. Oxidation of diphenylamine
Author/Authors :
Karunakaran, C. Annamalai University - Department of Chemistry, India , Karuthapandian, S. Annamalai University - Department of Chemistry, India
Abstract :
TiO2 anatase photocatalyzes the oxidative transformation of diphenylamine (DPA) to Nphenyl- p-benzoquinonimine (PBQ) in ethanol. The PBQ formation increases with increase of [DPA], TiO2-loading, airflow rate and light intensity. The catalyzed formation of PBQ is larger with UV-C light illumination than with UV-A light illumination. The catalyst is recyclable. The photocatalytic reaction mechanism has been proposed and the kinetic parameters deduced. ZnO and ZnS enhance the TiO2-photocatalyzed DPA oxidation suggesting interparticle charge transfer in mixed semiconductors.
Keywords :
Photocatalysis , Semiconductor , Kinetic law , Interparticle charge transfer
Journal title :
Egyptian Journal Of Basic and Applied Sciences
Journal title :
Egyptian Journal Of Basic and Applied Sciences
