Na doped ZnO Nanoparticles Assisted Photocatalytic Degradation of Congo Red Dye using Solar Light (original) (raw)

2017

Abstract

A simple route of synthesis of doped ZnO nanoparticles with efficient response to solar light has always been demanded. Doped ZnO has been applied as a photocatalyst for the degradation of hazardous dyes such as Congo red (CR) dye. In this study, a simple approach for Na-doped ZnO (Na-ZnO) nanoparticles by co-precipitation using NaOH as a precipitating and doping agent was reported. Changing the molar ratio between the moles of NaOH and Zn+2 ions as 3:1 was the main key for this approach. As-prepared Na-ZnO was characterized by different morphological and optical analysis. Na-ZnO confirmed to be solar photocatalyst used for the degradation of aqueous solution of 30 mg/L CR dye with high efficient as 98.9% removal in 70 min under direct sunlight. Moreover, main parameters affecting the photocatalytic degradation of CR dye such as the effect of pH, initial dye concentration and effect of day time on the photodegradation process of CR dye were investigated. In presence of direct sunlig...

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