In situ synthesis of TiO2-functionalized metal nanoparticles / David M. King in Industrial & engineering chemistry research, Vol. 48 N°1 (Janvier 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 352-360 Titre : In situ synthesis of TiO2-functionalized metal nanoparticles Type de document : texte imprimé Auteurs : David M. King, Éditeur scientifique ; Yun Zhou, Éditeur scientifique ; Louis F. Hakim, Éditeur scientifique Année de publication : 2009 Article en page(s) : P. 352-360 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Metal nanoparticles Atomic layer deposition (ALD) Gas-phase TiO2 ALD Résumé : The ability to prepare and functionalize passivated nanosized metal powders was demonstrated using TiO2 films that were deposited via atomic layer deposition (ALD). Metal nanopowders were synthesized from the dehydration and subsequent decomposition of bulk quantities of metal oxalates in a fluidized-bed reactor. The gas-phase TiO2 ALD coating process was used to passivate these particles in situ, which alleviated the need to expose the oxygen-sensitive materials to air. Metal oxalate size reduction was achieved using a cryogenic milling process that reduced the micrometer-sized oxalate feed powder and yielded metal nanopowders with an average primary diameter of ∼50 nm. The metal oxalates that have received the most attention are those of iron, nickel, cobalt, and copper. Al2O3-based ALD films have been deposited on each of these metals, whereas TiO2:metal nanocomposite powder research has been performed here and is the basis for this work. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800196h [article] In situ synthesis of TiO2-functionalized metal nanoparticles [texte imprimé] / David M. King, Éditeur scientifique ; Yun Zhou, Éditeur scientifique ; Louis F. Hakim, Éditeur scientifique . - 2009 . - P. 352-360. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 352-360 Mots-clés : Metal nanoparticles Atomic layer deposition (ALD) Gas-phase TiO2 ALD Résumé : The ability to prepare and functionalize passivated nanosized metal powders was demonstrated using TiO2 films that were deposited via atomic layer deposition (ALD). Metal nanopowders were synthesized from the dehydration and subsequent decomposition of bulk quantities of metal oxalates in a fluidized-bed reactor. The gas-phase TiO2 ALD coating process was used to passivate these particles in situ, which alleviated the need to expose the oxygen-sensitive materials to air. Metal oxalate size reduction was achieved using a cryogenic milling process that reduced the micrometer-sized oxalate feed powder and yielded metal nanopowders with an average primary diameter of ∼50 nm. The metal oxalates that have received the most attention are those of iron, nickel, cobalt, and copper. Al2O3-based ALD films have been deposited on each of these metals, whereas TiO2:metal nanocomposite powder research has been performed here and is the basis for this work. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800196h

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