Title
Mössbauer and Raman spectroscopic study of oxidation and reduction of iron oxide nanoparticles promoted by various carboxylic acid layers
Date Issued
01 April 2017
Access level
metadata only access
Resource Type
journal article
Author(s)
da Silva S.W.
Guilherme L.R.
de Oliveira A.C.
Garg V.K.
Rodrigues P.A.M.
da Silva Ferreira Q.
de Melo G.H.F.
Lengyel A.
Szalay R.
Homonnay Z.
Klencsár Z.
Tolnai G.
Kuzmann E.
University of Brasília
Publisher(s)
Springer Netherlands
Abstract
The effect of coating with nine different carboxylic acids (glycolic, propionic, lactic, malic, tartaric, citric, mandelic, caproic and caprylic) on nanostructured magnetite (D ~ 10 nm) was studied by Raman and photoacoustic, magnetic and 57Fe Mössbauer measurements. Mössbauer spectra of frozen suspensions showed dominantly magnetically split envelopes at lower temperatures, which were evaluated by hyperfine field distribution method. Mössbauer and Raman spectroscopy indicated similar variation of relative occurrence of magnetite and maghemite phases. These results are discussed on the basis of the hypothesis that different carboxylic acids can promote either the oxidation or reduction of iron oxide nanoparticles.
Start page
111
End page
119
Volume
312
Issue
1
Language
English
OCDE Knowledge area
Nano-procesos
Subjects
Scopus EID
2-s2.0-85011554696
Source
Journal of Radioanalytical and Nuclear Chemistry
ISSN of the container
02365731
Sponsor(s)
This work was supported by grants of CAPES (No A127/2013) and OTKA (No K115913 and K115784). This work was carried out within the Agreement of Cooperation between Eötvös Loránd University (Budapest) and Universidade de BrasÃlia (BrasÃlia).
Sources of information:
Directorio de Producción Científica
Scopus