| Titre : | Stable core shell Co3Fe7 – CoFe2O4 nanoparticles synthesized via flame spray pyrolysis approach (2012) |
| Auteurs : | Yunfeng Li, Auteur ; Yanjie Hu, Auteur ; Junchao Huo, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 34, Août 2012) |
| Article en page(s) : | pp. 11157-11162 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Pyrolysis Flame Nanoparticle |
| Résumé : | Air stable Co3Fe7―CoFe2O4 nanoparticles have been synthesized via one-step flame spray pyrolysis of a mixture of Fe/Co precursor solution under stronger reducing atmosphere. The as-synthesized nanoparticles with diameters of 20-80 nm showed a typical core shell structure and high stability for being one month in air, whose metallic Co3Fe7 cores were protected against oxidation by a surface shell of about 2―4 nm cobalt iron oxide (CoFe2O4). The ratio of metallic Fe/Co alloy nanoparticles was 7:3. The alloy nanoparticles exhibited enhanced saturation magnetization (126.1 emu/g), compared with flame sprayed iron nanoparticles with the same conditions. The formation process of metallic alloy nanoparticles with core-shell structure was investigated, which included three stages: flame combustion, reducing, and surface oxidation during the flame process. It is reckoned that such a continuous production approach is an effective way to produce the stable Co3Fe7 alloy nanoparticles with high saturation magnetization. |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26299441 |
