Structural characterization, electrical and photocatalytic properties of α−and γ-Fe2O3 nanoparticles dispersed in iron aluminosilicate glass

Khan, Irfan; Kuzmann, Ernő; Nomura, Kiyoshi; Ali, Ahmad S.; Akiyama, Kazuhiko; Homonnay, Zoltán; Sinkó, Katalin; Pavić, Luka; Kubuki, Shiro (2021) Structural characterization, electrical and photocatalytic properties of α−and γ-Fe2O3 nanoparticles dispersed in iron aluminosilicate glass. Journal of Non-Crystalline Solids, 561 . ISSN 0022-3093

PDF - Accepted Version - article Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (446kB)

Abstract

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 (-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.

Item Type:	Article
Uncontrolled Keywords:	Sol-gel process; Alumina doping; α-Fe2O3/-Fe2O3 Nanoparticles;Photocatalytic properties; Electrical conductivity.
Subjects:	NATURAL SCIENCES NATURAL SCIENCES > Physics NATURAL SCIENCES > Chemistry
Divisions:	Division of Materials Chemistry
Depositing User:	Luka Pavić
Date Deposited:	13 Jan 2026 11:08
URI:	http://fulir.irb.hr/id/eprint/10705
DOI:	10.1016/j.jnoncrysol.2021.120756

Actions (login required)

View Item