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Title:Sinteza magnetnih nanodelcev, funkcionaliziranih s tanko plastjo silike
Authors:Čampelj, Stanislav (Author)
Makovec, Darko (Author)
Bele, Marjan (Author)
Drofenik, Mihael (Author)
Jamnik, Janko (Author)
Inštitut za kovinske materiale in tehnologije (Authorship owner)
Files:.pdf Materiali_in_Tehnologije_2007_Campelj_et_al._Sinteza_magnetnih_nanodelcev,_funkcionaliziranih_s_tanko_plastjo_silike.pdf (731,75 KB)
MD5: C2941043B5A42F02C9FE1D0B9DBC9F72
 
URL http://mit.imt.si/Revija/izvodi/mit072/campelj.pdf
 
Language:Slovenian
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:V prispevku opisujemo pripravo maghemitnih nanodelcev prevlečenih s siliko. Postopek je potekal v treh ločenih stopnjah. V prvi smo delce sintetizirali s koprecipitacijo ionov Fe[na]{2+} in Fe[na]{3+}. V drugi smo delce prevlekli s citronsko kislino, da bi preprečili aglomeracijo, in jih dispergirali v vodi. Uspešnost dispergiranja smo spremljali z ugotavljanjem masnega deleža delcev, dispergiranih v vodi. Vsebnost delcev je odvisna od pH-vrednosti pri kateri secitronska kislina adsorbira na površini in koncentracije raztopljene citronske kisline. Tretja stopnja postopka je vsebovala prevlačenje nanodelcev s siliko, ki je potekalo v vodni suspenziji. Ključnega pomena za uspešno prevlačenje nanodelcev s siliko je stabilnost suspenzije nanodelcev oblečenih s citronsko kislino.
Keywords:maghemit, nanodelci, citronska kislina, silika, vodna suspenzija
Year of publishing:2007
Number of pages:str. 103-107
Numbering:št. 2, Letn. 41
ISSN:1580-2949
UDC:537.622:532:532/533:620.1
ISSN on article:1580-2949
COBISS_ID:604586 New window
NUK URN:URN:SI:UM:DK:NMIYNA9N
Views:727
Downloads:84
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Record is a part of a journal

Title:Materiali in tehnologije
Shortened title:Mater. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije
ISSN:1580-2949
COBISS.SI-ID:106193664 New window

Secondary language

Language:English
Title:Synthesis of magnetic nanoparticles functionalized with thin layer of silica
Abstract:In this paper we describe the synthesis of maghemite nanoparticles coated with silica. The process was divided into three separate steps. In first step we have synthesized particles with co-precipitation of Fe[sup]{2+} and Fe[sup]{3+} ions. In the second step the particles were coated with citric acid in order to prevent agglomeration and dispersed in water. The success of dispersion was determined by weight percent of dispersed particles in water. The quantity of dispersed particles depends on pH value at which the citric acid was adsorbed on the surface of particles and on the concentration of dissolved citric acid. The third step was coating the nanoparticles with silica, which took place in the water suspension. The key factor for successful coating of nanoparticles with silica is the stability of suspension of nanoparticles coated with citric acid.
Keywords:maghemite, nanoparticles, citric acid, silica, water suspension


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