The influence of ultrasound on the Ruthenium iodide RuI3-catalyzed oxidation of phenol: Catalyst study and experimental design
Ekaterina V. Rokhina¹, Manu Lahtinen², Mathias C.M. Nolte³, Jurate Virkutyte¹; Applied Catalysis B: Environmental 87 (2009) 162–170.
Abstract: In the present study we report a facile and reproducible method of preparing magnetic thermosensitive hybrid material based on P(NIPAM) microgels covered with γ-Fe2O3 iron oxide nanoparticles of 6-nm size. The iron oxide nanoparticles provided magnetic response to the microgels. In addition, the presence of the magnetic nanoparticles on the microgels altered their swelling behavior and shifted their volume phase transition temperature to higher values. In particular, for inorganic shells with 18% (w/w) of magnetic nanoparticles the volume phase transition of the microgels was shifted from 36 to 40 °C. In contrast, for shells consisting of 38% (w/w) magnetic nanoparticles the volume phase transition of the microgels was almost blocked, thus indicating that the microgel thermal response was strongly affected by the presence of the inorganic nanoparticles. The synthesized thermosensitive magnetic microgels are envisaged to be ideal for potential applications as thermosensitive targeted drug delivery systems.
Key words: Ultrasound • Phenol • Ruthenium iodide • Oxidation • Particle size • LUMiSizer
¹ Department of Environmental Science, University of Kuopio (KY), FI-70211 KY, Finland, ² Department of Chemistry, University of Jyvaskyla (JY), FI-40014 JY, Finland, ³ Institute of Environmental Technology and Energy Economics, Technische Universitat Hamburg-Harburg, Eibendorfer Strabe 40, 21073 Hamburg, Germany.Contact us
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