Continuous supercritical hydrothermal synthesis of iron oxide nanoparticle dispersions and their characterization
| Autor: | M. Daschner de Tercero, Ulrich Fehrenbacher, U. Teipel, C. Röder, Michael Türk |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Iron oxide Analytical chemistry Nanoparticle Bioengineering General Chemistry Condensed Matter Physics Atomic and Molecular Physics and Optics Hydrothermal circulation Supercritical fluid chemistry.chemical_compound symbols.namesake chemistry Agglomerate Modeling and Simulation symbols Hydrothermal synthesis General Materials Science Raman spectroscopy Dispersion (chemistry) |
| Zdroj: | Journal of Nanoparticle Research. 16 |
| ISSN: | 1572-896X 1388-0764 |
| DOI: | 10.1007/s11051-014-2350-1 |
| Popis: | Electrostatically stabilized iron oxide nanoparticle dispersions were synthesized using a continuous hydrothermal process at 673 K and 30 MPa. The average size of the primary particles was in the range 5–30 nm. The influence of the flow conditions as well as the composition of the starting material on the dispersion properties was investigated. A new Raman spectroscopic measurement setup was used for the characterization of the structure of the nanoparticles in dispersed form. The use of differential centrifugal sedimentation for the determination of the size distribution of the dispersed particles proved to be convenient and powerful to determine the influence of the investigated parameters on the dispersion properties. For certain compositions of the starting material and flow conditions using a conventional T-union, narrow size distributions concerning both primary particles and agglomerates could be obtained. |
| Databáze: | OpenAIRE |
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