Low-Temperature Synthesis of CoO Nanoparticles via Chemically Assisted Oxidative Decarbonylation

Chem. Mater., 20 (1), 92–100, 2008. 10.1021/cm7018636
Web Release Date: November 20, 2007

Low-Temperature Synthesis of CoO Nanoparticles via Chemically Assisted Oxidative Decarbonylation

Anna Lagunas,^† Antoni Mairata i Payeras,^† Ciril Jimeno,^† Víctor F. Puntes,^§^∥ and Miquel A. Pericàs^*^†^‡

Institute of Chemical Research of Catalonia, Avgda. Països Catalans, 16. E-43007 Tarragona, Spain, Departament de Química Orgànica, Universitat de Barcelona, E-08028 Barcelona, Spain, Institut Català de Nanotecnologia, Campus de Bellaterra, E-08193 Bellaterra, Spain, and Institut Català de Recerca i Estudis Avançats, Barcelona, Spain

Received July 16, 2007

Revised Manuscript Received October 15, 2007

Abstract:

A low-temperature route to pure CoO nanoparticles based on the oxidative decarbonylation of dicobalt octacarbonyl promoted by amine oxides is presented. The small size of the resulting particles (~1.7 nm) leads to spontaneous nanoparticle aggregation. Magnetic measurements show a bimodal behavior with two distinct blocking temperatures, which can be ascribed to the individual CoO nanoparticles and to narrowly size-dispersed aggregates.

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