Magnetic and Porous Nanospheres from Ultrasonic Spray Pyrolysis.
We have used an inexpensive high-frequency ultrasound generator from a household humidifier to create a useful source for ultrasonic spray pyrolysis and produced submicrometer silica particles that are porous on the nanometer scale. By using two heated zones, we first initiate polymerization of orga...
| Publicado en: | Journal of the American Chemical Society Vol. 127; no. 34; pp. 12007 - 12011 |
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| Autores principales: | , |
| Formato: | Artículo |
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American Chemical Society
8/31/2005
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=18186839&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 18186839 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 8/31/2005 vid: 127 iid: 34 pid: 997 pub: American Chemical Society artinfo: ui: 18186839 10.1021/ja050693p ppf: 12007 ppct: 4 formats: tig: atl: Magnetic and Porous Nanospheres from Ultrasonic Spray Pyrolysis. aug: au: Won Hyuk Suh Suslick, Kenneth S. affil: School of Chemical Sciences, University of Illinois, Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801. su: Humidifiers Humidity control Pyrolysis Chemical reactions Nanoparticles Transition metals sug: subj: Humidifiers Humidity control Pyrolysis Chemical reactions Nanoparticles Transition metals ab: We have used an inexpensive high-frequency ultrasound generator from a household humidifier to create a useful source for ultrasonic spray pyrolysis and produced submicrometer silica particles that are porous on the nanometer scale. By using two heated zones, we first initiate polymerization of organic monomers in the presence of silica colloid, which creates in situ a composite of silica with an organic polymer, followed by a second heating to pyrolyze and remove the polymer. The morphology and surface area of the final porous silica are controlled by varying the silica-to-organic monomer ratio. In a single flow process, ferromagnetic cobalt nanoparticles can be easily encapsulated in the porous silica, and the resulting nanospheres are extremely resistant to air oxidation. Products were characterized by SEM, (S)TEM, EDS, XPS, and SQUID. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2005 holdings: @attributes: islocal: N |
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