Kinetics of adsorption and photocatalytic decomposition of a diazo dye by nanocomposite ZnO-MgO

The synthesis of ZnO-MgO nanocomposite via modified Pechini method was performed. crystalline structure and the morphology nanocrystals were studied by X-ray diffraction analysis scanning electron microscopy. study on kinetics diazo dye adsorption its photocatalytic decomposition surface It shown that rate process in aqueous solution is described a kinetic equation first order. application allows to significantly increase efficiency UV water treatment purification from dye. However, brief deviation experimental data degradation values widely used order observed. Keywords: photocatalysis, adsorption, ZnO-MgO, nanocomposite, kinetics.