Abstract
In this study, undoped zinc oxide (ZnO) and silver (Ag) doped ZnO micro/nanostructures were successfully synthesized for photodegradation of Methylene Blue (MB) dye under visible-light. X-ray diffraction (XRD) patterns confirm appeared of the Ag phase and polycrystalline structure of ZnO with a wurtzite hexagonal phase growth in 101 direction. The energy dispersive spectra (EDX) study confirms homogeneity and purity of specimens. Field emission scanning electron microscopy (FESEM) results exhibited agglomeration of irregularly shaped nanoparticles (NPs), decreasing with increasing Ag doped concentration. UV–visible spectra revealed that the Ag leads to shifting in ZnO spectra and increased absorptance in a visible-light region. The photocatalytic result showed significantly enhanced with photodegradation activity 92.2%, 93.1%, 95.08%, and 96.7% for doped specimens, respectively, as compared to 73.8% for an undoped specimen. The enhance of photocatalytic performance may be attributed to increasing the aspect ratio of specimens, improve separation of charge carriers, surface Plasmon resonance (SPR) and high electron photogenerated efficiency
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