Structural characterization, electrical and photocatalytic properties of α−and γ-Fe2O3 nanoparticles dispersed in iron aluminosilicate glass (CROSBI ID 297005)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Khan, Irfan ; Kuzmann, Erno ; Nomura, Kiyoshi ; Ali, Ahmad S. ; Akiyama, Kazuhiko ; Homonnay, Zoltan ; Sinko, Katalin ; Pavić, Luka ; Kubuki, Shiro
engleski
Structural characterization, electrical and photocatalytic properties of α−and γ-Fe2O3 nanoparticles dispersed in iron aluminosilicate glass
The glass samples with the composition of 40Fe2O3-xAl2O3-(60−x)SiO2 were prepared by sol-gel method. The samples were characterized by XRD, 80 K 57Fe Mössbauer spectroscopy, TEM, FTIR and impedance spectroscopy. In the glass samples with less than 10% alumina, fayalite and hematite were crystallized by addition of hercynite. Whereas nanoparticles of hematite (α-Fe2O3) and maghemite (γ-Fe2O3) doped with Al were confirmed with the increase of alumina contents (15% and 20%). The glass samples exhibit the electronic conduction which is explained by the polaronic conduction mechanism. It is noticed that the catalysts containing a mixture of hematite and maghemite nanoparticles showed higher photocatalytic degradation of Rhodamine B dye than those containing hematite alone. It is suggested from the characterizations of newly developed iron-containing aluminosilicate glass samples that the materials with several bandgaps and without dissolving itself should be developed in the future for water purification under visible light irradiation.
Sol-gel process ; Alumina doping ; α-Fe2O3/γ-Fe2O3 ; Nanoparticles ; Photocatalytic properties ; Electrical conductivity
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Podaci o izdanju
561
2021.
120756
11
objavljeno
0022-3093
1873-4812
10.1016/j.jnoncrysol.2021.120756