In this work, ZnO–Fe nanostructures with different morphologies were synthesized via a simple hydrothermal method. Different parameters such as surfactant, reaction time and temperature, Fe source value, and Zn source kind were changed to the investigation of each parameter on the product size and morphology. The results obtained from SEM images showed each parameter has a significant effect on the product size and morphology. Also, the TEM images confirmed the SEM results. The optical properties of the synthesized products were studied by UV–Vis spectroscopy and the results showed that by doping Fe3+ into the ZnO crystal lattice, the band gap is decreased and hence it can absorb more light than the bare ZnO. The photocatalytic activity of the product was examined by decomposition of methyl orange under ultraviolet radiation. The results showed that the product has high photocatalytic activity and it can decomposed dye structure by 62% that is mainly due to a decrease of the band gap of doped ZnO with respect to the bare ZnO one. The surface activity of the product was investigated by surface adsorption of the dye molecules on the nanostructure surface. The results showed due to high surface to volume ratio of the nanostructures, they could adsorb more than 65% of the dye and remove them from the solution. Another surface activity of the product was examined by removing Pb2+ from the water and the results were obtained by atomic absorption spectroscopy. The results showed that the product could remove Pb2+ more than 44% from the water.
Journal of Materials Science: Materials in Electronics – Springer Journals
Published: May 15, 2017
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