Supported ZnO nanostructures : synthesis kinetics and applications
مؤلف
Al-Harthiyah, Thuraya Said Mohammed.
الملخص الإنجليزي
Photoctalysis using zinc oxide nanostructures (ZnO NSs) is considered as an emerging solution for organic mineralization and pathogenic disinfection in water treatment. Glass plate supported ZnO nanorods (NRs) were synthesized following a green-cost effective hydrothermal route. Grown ZnO NRs crystallizes in wurtzite form and exhibit good optical properties. The kinetic investigations of the nanorod growth process reveal that ZnO growth reaction is first order with respect to Zn ions concentration in growth solution and it is dependent on temperature with an activation energy of Ea = 112.53 J/mol. Doping of ZnO with different metals to tune its optical activation toward visible region, suggests manganese as a dopant of choice that enhances the photocatalytic activity of ZnO. Al'Sharqiah sand was used as a support for ZnO NSs to increase the available surface area for the photocatalytic reaction and about 57% mineralization of Mb could be achieved within 2.3 h was found with sand-supported ZnO nanostructures used as photocatalysts.
