Synthesis Characterization and Photocatalytic Studies of Cobalt Ferrite-Silica-Titania Nanocomposites
| Autor: | Raquel Serrano-García, David J. Greene, Joseph Govan, Yurii K. Gun'ko |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
magnetic nanoparticles
Materials science Magnetism General Chemical Engineering Analytical chemistry Nanoparticle 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Article lcsh:Chemistry symbols.namesake chemistry.chemical_compound General Materials Science magnetic separation Nanocomposite titanium dioxide core-shell silica photocatalysis 021001 nanoscience & nanotechnology equipment and supplies 0104 chemical sciences Chemical engineering chemistry lcsh:QD1-999 Transmission electron microscopy Titanium dioxide symbols Photocatalysis Magnetic nanoparticles 0210 nano-technology Raman spectroscopy human activities |
| Zdroj: | Nanomaterials; Volume 4; Issue 2; Pages: 331-343 Nanomaterials Nanomaterials, Vol 4, Iss 2, Pp 331-343 (2014) |
| ISSN: | 2079-4991 |
| DOI: | 10.3390/nano4020331 |
| Popis: | In this work, CoFe2O4@SiO2@TiO2 core-shell magnetic nanostructures have been prepared by coating of cobalt ferrite nanoparticles with the double SiO2/TiO2 layer using metallorganic precursors. The Transmission Electron Microscopy (TEM), Energy Dispersive X-Ray Analysis (EDX), Vibrational Sample Magnetometer (VSM) measurements and Raman spectroscopy results confirm the presence both of the silica and very thin TiO2 layers. The core-shell nanoparticles have been sintered at 600 °C and used as a catalyst in photo-oxidation reactions of methylene blue under UV light. Despite the additional non-magnetic coatings result in a lower value of the magnetic moment, the particles can still easily be retrieved from reaction mixtures by magnetic separation. This retention of magnetism was of particular importance allowing magnetic recovery and re-use of the catalyst. |
| Databáze: | OpenAIRE |
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