Structural analysis and visible light-activated photocatalytic activity of iron-containing soda lime aluminosilicate glass

Yusuke Iida, Kazuhiko Akiyama, Balázs Kobzi, Katalin Sinkó, Z. Homonnay, E. Kuzmann, Mira Ristić, Stjepko Krehula, Tetsuaki Nishida, Shiro Kubuki

Research output: Contribution to journalArticle

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Abstract

A relationship between structure and visible light-activated photocatalytic activity of iron-containing soda lime aluminosilicate (15Na2O.15CaO.40Fe2O3.xAl2O3.(30-x)SiO2) glass (xNCFAS) was investigated by means of 57Fe-Mössbauer spectroscopy, X-ray diffractometry (XRD) and UV-visible light absorption spectroscopy (UV-VIS). The 57Fe-Mössbauer spectrum of 11NCFAS glass measured after heat-treatment at 1000 °C for 100 min was composed of a paramagnetic doublet due to FeIII(Td) and two magnetic sextets due to regular hematite (α-Fe2O3) and hematite with larger internal magnetic field. X-ray diffraction patterns of heat-treated xNCFAS samples resulted in decrease of α-Fe2O3 and increase of Ca2Fe22O33 or CaFe2O4 with alumina content. A quick decrease in methylene blue (MB) concentration from 15.6 to 4.7 μmol L-1 was observed in the photocatalytic reaction test with 40 mg of heat-treated 11NCFAS glass under visible light-exposure. The largest first-order rate constant of MB decomposition (k) was estimated to be 9.26 × 10-3 min-1. Tauc's plot yielded a band gap energy (Eg) of 1.88 eV for heat-treated 11NCFAS glass, which is smaller than previously reported Eg of 2.2 eV for α-Fe2O3. These results prove that addition of Al2O3 into iron-containing soda lime silicate glass is favorable for the preparation of improved visible light-photocatalyst with 'ubiquitous' elements.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Alloys and Compounds
Volume645
DOIs
Publication statusPublished - Apr 28 2015

Fingerprint

Aluminosilicates
Structural analysis
Lime
Iron
Glass
Methylene Blue
Hematite
Silicates
Aluminum Oxide
Photocatalysts
Absorption spectroscopy
Light absorption
X ray diffraction analysis
Diffraction patterns
Rate constants
Energy gap
Alumina
Heat treatment
soda lime
aluminosilicate

Keywords

  • <sup>57</sup>Fe-Mössbauer spectroscopy
  • Aluminosilicate glass
  • Hematite
  • Visible light-activated photocatalyst

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

Structural analysis and visible light-activated photocatalytic activity of iron-containing soda lime aluminosilicate glass. / Iida, Yusuke; Akiyama, Kazuhiko; Kobzi, Balázs; Sinkó, Katalin; Homonnay, Z.; Kuzmann, E.; Ristić, Mira; Krehula, Stjepko; Nishida, Tetsuaki; Kubuki, Shiro.

In: Journal of Alloys and Compounds, Vol. 645, 28.04.2015, p. 1-6.

Research output: Contribution to journalArticle

Iida, Yusuke ; Akiyama, Kazuhiko ; Kobzi, Balázs ; Sinkó, Katalin ; Homonnay, Z. ; Kuzmann, E. ; Ristić, Mira ; Krehula, Stjepko ; Nishida, Tetsuaki ; Kubuki, Shiro. / Structural analysis and visible light-activated photocatalytic activity of iron-containing soda lime aluminosilicate glass. In: Journal of Alloys and Compounds. 2015 ; Vol. 645. pp. 1-6.
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AU - Akiyama, Kazuhiko

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AU - Sinkó, Katalin

AU - Homonnay, Z.

AU - Kuzmann, E.

AU - Ristić, Mira

AU - Krehula, Stjepko

AU - Nishida, Tetsuaki

AU - Kubuki, Shiro

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