Photocatalytic degradation of methyl red dye by silica nanoparticles
| Autor: | Yehia Badr, M.G. Abd El-Wahed, Mahmoud A. Mahmoud |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Silver
Environmental Engineering Materials science Photochemistry Ultraviolet Rays Health Toxicology and Mutagenesis Nanoparticle Nanotechnology Waste Disposal Fluid Catalysis Silver nanoparticle Water Purification chemistry.chemical_compound Microscopy Electron Transmission Environmental Chemistry Particle Size Coloring Agents Photodegradation Waste Management and Disposal Silicon Dioxide Pollution chemistry Colloidal gold Methyl red Photocatalysis Nanoparticles Gold Particle size Azo Compounds Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Journal of Hazardous Materials. 154:245-253 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2007.10.020 |
| Popis: | Silica nanoparticles (SiO2 NPs) were found to be photocatalytically active for degradation of methyl red dye (MR). The SiO2 NPs and SiO2 NPs doped with silver (and or) gold nanoparticles were prepared. From the transmission electron microscopy (TEM) images the particle size and particle morphology of catalysts were monitored. Moreover, SiO2 NPs doped with silver and gold ions were used as a photocatalyst for degradation of MR. The rate of photocatalytic degradation of MR was found to be increased in the order of SiO2 NPs, SiO2 NPs coated with gold nanoparticles (Au NPs) and silver nanoparticles (Ag NPs), SiO2 NPs coated with Ag NPs, SiO2 NPs coated with Au NPs, Ag+-doped SiO2 NPs, and Au3+-doped SiO2 NPs. The kinetic and mechanism of photocatalytic reaction were studied and accorded well with experimental results. |
| Databáze: | OpenAIRE |
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