Synthesis of supported silver nano-spheres on zinc oxide nanorods for visible light photocatalytic applications
| Autor: | Khaled Saoud, Nasr Bensalah, Massimo F. Bertino, Joydeep Dutta, Rola M. Al-Soubaihi, Tanujjal Bora |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Metal-semiconductor composite
Materials science Precipitation (chemistry) Mechanical Engineering Inorganic chemistry technology industry and agriculture Silver Nano chemistry.chemical_element Nanoparticle Infrared spectroscopy ZnO nanorods Zinc equipment and supplies Condensed Matter Physics Silver nanoparticle chemistry Chemical engineering Mechanics of Materials Supported catalyst Photocatalysis General Materials Science Nanorod Silver nanoparticles |
| Popis: | We report the synthesis of silver (Ag) nano-spheres (NS) supported on zinc oxide (ZnO) nanorods through two step mechanism, using open vessel microwave reactor. Direct reduction of ZnO from zinc nitrates was followed by deposition precipitation of the silver on the ZnO nanorods. The supported Ag/ZnO nanoparticles were then characterized by electron microscopy, X-ray diffraction, FTIR, photoluminescence and UV–vis spectroscopy. The visible light photocatalytic activity of Ag/ZnO system was investigated using a test contaminant, methylene blue (MB). Almost complete removal of MB in about 60min for doses higher than 0.5g/L of the Ag/ZnO photocatalyst was achieved. This significant improvement in the photocatalytic efficiency of Ag/ZnO photocatalyst under visible light irradiation can be attributed to the presence of Ag nanoparticles on the ZnO nanoparticles which greatly enhances absorption in the visible range of solar spectrum enabled by surface plasmon resonance effect from Ag nanoparticles. Financial support from the Chair in Nanotechnology program of the Research Council of Oman (TRC) and Sultan Qaboos University. |
| Databáze: | OpenAIRE |
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