Author/Authors :
Ghaneian، Mohammad Taghi نويسنده , , Morovati، Pouran نويسنده Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences, Yazd, Iran , , Ehrampoush، Mohammad Hassan نويسنده Department of Environmental Health Engineering, School of Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran , , Tabatabaee، Masoumeh نويسنده 2Department of Chemistry, Yazd Branch, Islamic Azad University, Yazd, Iran ,
Abstract :
Nano-sized flower-like Ag/ZnO was synthesized by a simple method using zinc acetate and silver acetate under
hydrothermal condition. Powder X-ray diffraction (PXRD) and transmission electron microscopy (TEM) were used to
characterize the structure and morphology of the synthesized powder. Nano flower-like Ag/ZnO was used as a
photocatalyst for degradation of humic acid in aqueous solution. The disappearance of HA was analyzed by measuring
the absorbance of sample at special wavelength (254 nm). The effects of various parameters such as amount of
photocatalyst, pH, initial humic acid concentration and irradiation time on degradation rate were systematically
investigated. Photodegradation efficiency was small when the photolysis was carried out in the absence of Ag/ZnO
and it was also negligible in the absence of light. Approximately 70% of humic acid (50 mg/L) has been eliminated
after 40 minutes in the presences of catalyst (catalyst dose o.6 g/L and pH =7) and UVA irradiation. While, 100% of
humic acid has been eliminated with solar irradiation.
