| Comparative Study on Optical and Electrochemical
Properties of MFe2O4 (M = Mg, Ca, Ba) Nanoparticles |
Huajing Gao,a, b Hua Yanga, b and Shifa Wangc, d,*
Page : 150-160
DOI : 10.1080/0371750X.2018.1512381 |
| Abstract |
| MFe2O4 (M = Mg, Ca, Ba) nanoparticles are successfully synthesized by two
different synthesis routes. The effects of calcination temperature and synthesis
route on the optical and electrochemical properties of MFe2O4 nanoparticles have
been systematically researched by UV-visible spectroscopy and electrochemical
impedance measurements. The results confirm that the carbon particles can
suppress the formation of M-ferrite. The color, optical and electrochemical
properties of MFe2O4 nanoparticles appear to be highly dependent on calcination
temperature, synthesis route and oxidation state of the chromophore ion and
divalent metal M. Interestingly, the carbon introduced into (Mg, Ca, Ba)-ferrite
precursor solution reduces flat-band potential and changes the color of MFe2O4
nanoparticles. The flat-band potential of MFe2O4 nanoparticles has been found to
decrease with increasing atomic number of divalent metal M.
[Keywords: MFe2O4 nanoparticles, Polyacrylamide gel route, Color parameters,
Flat-band potential, Atomic number, Divalent metal] |
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