Photocatalytic effect and Mössbauer study of iron titanium silicate glass prepared by sol-gel method

Yusuke Takahashi, Shiro Kubuki, Kazuhiko Akiyama, Katalin Sinkó, Z. Homonnay, E. Kuzmann, Tetsuaki Nishida

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A relationship between the photocatalytic effect and the local structure of 50Fe2O3⋅ (50−x)SiO2⋅xTiO2 glass abbreviated as 50FSxTi prepared by sol-gel method was investigated by 57Fe-Mössbauer spectroscopy (FeMS), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR) and ultraviolet-visible diffuse reflectance spectroscopy (UV-VIS). Mössbauer spectra of 50FSxTi glass before annealing showed a doublet with the isomer shift (δ) and quadrupole splitting (Δ) of 0.41±0.01 mm s−1 and 0.75±0.02 mm s−1, indicating that Fe3+ formed FeO6 octahedra (Oh). A comparable δ of 0.36±0.02 mm s−1 and the larger Δ of 0.92±0.02 mm s−1 values were confirmed for 50FSxTi after annealed at 400 C for 3 h. These results indicates that the coordination number of iron polyhedra decreases from 6 to 4 due to annealing. UV-VIS diffuse reflectance spectra of 50FS10Ti yielded two optical band gap energies (Eg’s) of 2.05 eV and 3.55 eV. This result implied that 50FS10Ti has two optical band gaps in the visible area and UV area. A bleaching test performed by 10 mL of MB aqueous solution and 40 mg of powder 50FS10Ti glass sample showed that MB absorbance decreased from 3.16 to 0.43 after UV-visible light irradiation for 2 h with the first order rate constant (k) of 1.6×10−2min−1$1.6\times 10^{-2}~ \min ^{-1}$. These results prove that titanium containing iron silicate glass with the composition of 50Fe2O3⋅40SiO2⋅10TiO2 has the UV and visible light responsive photocatalytic effect.

Original languageEnglish
Pages (from-to)51-58
Number of pages8
JournalHyperfine Interactions
Volume232
Issue number1-3
DOIs
Publication statusPublished - Jan 7 2015

Fingerprint

Sol-gel process
silicates
Iron
titanium
gels
iron
Glass
glass
Optical band gaps
reflectance
Spectroscopy
Annealing
spectroscopy
Silicates
annealing
bleaching
Bleaching
Titanium
polyhedrons
coordination number

Keywords

  • <sup>57</sup>Fe-Mössbauer spectroscopy
  • Iron silicate glass
  • Methylene blue
  • Photocatalytic effect
  • Sol-gel method

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear and High Energy Physics
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

Photocatalytic effect and Mössbauer study of iron titanium silicate glass prepared by sol-gel method. / Takahashi, Yusuke; Kubuki, Shiro; Akiyama, Kazuhiko; Sinkó, Katalin; Homonnay, Z.; Kuzmann, E.; Nishida, Tetsuaki.

In: Hyperfine Interactions, Vol. 232, No. 1-3, 07.01.2015, p. 51-58.

Research output: Contribution to journalArticle

Takahashi, Yusuke ; Kubuki, Shiro ; Akiyama, Kazuhiko ; Sinkó, Katalin ; Homonnay, Z. ; Kuzmann, E. ; Nishida, Tetsuaki. / Photocatalytic effect and Mössbauer study of iron titanium silicate glass prepared by sol-gel method. In: Hyperfine Interactions. 2015 ; Vol. 232, No. 1-3. pp. 51-58.
@article{cff1b8e0e99147a098670dbdcc03479b,
title = "Photocatalytic effect and M{\"o}ssbauer study of iron titanium silicate glass prepared by sol-gel method",
abstract = "A relationship between the photocatalytic effect and the local structure of 50Fe2O3⋅ (50−x)SiO2⋅xTiO2 glass abbreviated as 50FSxTi prepared by sol-gel method was investigated by 57Fe-M{\"o}ssbauer spectroscopy (FeMS), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR) and ultraviolet-visible diffuse reflectance spectroscopy (UV-VIS). M{\"o}ssbauer spectra of 50FSxTi glass before annealing showed a doublet with the isomer shift (δ) and quadrupole splitting (Δ) of 0.41±0.01 mm s−1 and 0.75±0.02 mm s−1, indicating that Fe3+ formed FeO6 octahedra (Oh). A comparable δ of 0.36±0.02 mm s−1 and the larger Δ of 0.92±0.02 mm s−1 values were confirmed for 50FSxTi after annealed at 400 ∘C for 3 h. These results indicates that the coordination number of iron polyhedra decreases from 6 to 4 due to annealing. UV-VIS diffuse reflectance spectra of 50FS10Ti yielded two optical band gap energies (Eg’s) of 2.05 eV and 3.55 eV. This result implied that 50FS10Ti has two optical band gaps in the visible area and UV area. A bleaching test performed by 10 mL of MB aqueous solution and 40 mg of powder 50FS10Ti glass sample showed that MB absorbance decreased from 3.16 to 0.43 after UV-visible light irradiation for 2 h with the first order rate constant (k) of 1.6×10−2min−1$1.6\times 10^{-2}~ \min ^{-1}$. These results prove that titanium containing iron silicate glass with the composition of 50Fe2O3⋅40SiO2⋅10TiO2 has the UV and visible light responsive photocatalytic effect.",
keywords = "<sup>57</sup>Fe-M{\"o}ssbauer spectroscopy, Iron silicate glass, Methylene blue, Photocatalytic effect, Sol-gel method",
author = "Yusuke Takahashi and Shiro Kubuki and Kazuhiko Akiyama and Katalin Sink{\'o} and Z. Homonnay and E. Kuzmann and Tetsuaki Nishida",
year = "2015",
month = "1",
day = "7",
doi = "10.1007/s10751-014-1118-4",
language = "English",
volume = "232",
pages = "51--58",
journal = "Hyperfine Interaction",
issn = "0304-3843",
publisher = "Springer Netherlands",
number = "1-3",

}

TY - JOUR

T1 - Photocatalytic effect and Mössbauer study of iron titanium silicate glass prepared by sol-gel method

AU - Takahashi, Yusuke

AU - Kubuki, Shiro

AU - Akiyama, Kazuhiko

AU - Sinkó, Katalin

AU - Homonnay, Z.

AU - Kuzmann, E.

AU - Nishida, Tetsuaki

PY - 2015/1/7

Y1 - 2015/1/7

N2 - A relationship between the photocatalytic effect and the local structure of 50Fe2O3⋅ (50−x)SiO2⋅xTiO2 glass abbreviated as 50FSxTi prepared by sol-gel method was investigated by 57Fe-Mössbauer spectroscopy (FeMS), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR) and ultraviolet-visible diffuse reflectance spectroscopy (UV-VIS). Mössbauer spectra of 50FSxTi glass before annealing showed a doublet with the isomer shift (δ) and quadrupole splitting (Δ) of 0.41±0.01 mm s−1 and 0.75±0.02 mm s−1, indicating that Fe3+ formed FeO6 octahedra (Oh). A comparable δ of 0.36±0.02 mm s−1 and the larger Δ of 0.92±0.02 mm s−1 values were confirmed for 50FSxTi after annealed at 400 ∘C for 3 h. These results indicates that the coordination number of iron polyhedra decreases from 6 to 4 due to annealing. UV-VIS diffuse reflectance spectra of 50FS10Ti yielded two optical band gap energies (Eg’s) of 2.05 eV and 3.55 eV. This result implied that 50FS10Ti has two optical band gaps in the visible area and UV area. A bleaching test performed by 10 mL of MB aqueous solution and 40 mg of powder 50FS10Ti glass sample showed that MB absorbance decreased from 3.16 to 0.43 after UV-visible light irradiation for 2 h with the first order rate constant (k) of 1.6×10−2min−1$1.6\times 10^{-2}~ \min ^{-1}$. These results prove that titanium containing iron silicate glass with the composition of 50Fe2O3⋅40SiO2⋅10TiO2 has the UV and visible light responsive photocatalytic effect.

AB - A relationship between the photocatalytic effect and the local structure of 50Fe2O3⋅ (50−x)SiO2⋅xTiO2 glass abbreviated as 50FSxTi prepared by sol-gel method was investigated by 57Fe-Mössbauer spectroscopy (FeMS), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR) and ultraviolet-visible diffuse reflectance spectroscopy (UV-VIS). Mössbauer spectra of 50FSxTi glass before annealing showed a doublet with the isomer shift (δ) and quadrupole splitting (Δ) of 0.41±0.01 mm s−1 and 0.75±0.02 mm s−1, indicating that Fe3+ formed FeO6 octahedra (Oh). A comparable δ of 0.36±0.02 mm s−1 and the larger Δ of 0.92±0.02 mm s−1 values were confirmed for 50FSxTi after annealed at 400 ∘C for 3 h. These results indicates that the coordination number of iron polyhedra decreases from 6 to 4 due to annealing. UV-VIS diffuse reflectance spectra of 50FS10Ti yielded two optical band gap energies (Eg’s) of 2.05 eV and 3.55 eV. This result implied that 50FS10Ti has two optical band gaps in the visible area and UV area. A bleaching test performed by 10 mL of MB aqueous solution and 40 mg of powder 50FS10Ti glass sample showed that MB absorbance decreased from 3.16 to 0.43 after UV-visible light irradiation for 2 h with the first order rate constant (k) of 1.6×10−2min−1$1.6\times 10^{-2}~ \min ^{-1}$. These results prove that titanium containing iron silicate glass with the composition of 50Fe2O3⋅40SiO2⋅10TiO2 has the UV and visible light responsive photocatalytic effect.

KW - <sup>57</sup>Fe-Mössbauer spectroscopy

KW - Iron silicate glass

KW - Methylene blue

KW - Photocatalytic effect

KW - Sol-gel method

UR - http://www.scopus.com/inward/record.url?scp=84933178003&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84933178003&partnerID=8YFLogxK

U2 - 10.1007/s10751-014-1118-4

DO - 10.1007/s10751-014-1118-4

M3 - Article

AN - SCOPUS:84933178003

VL - 232

SP - 51

EP - 58

JO - Hyperfine Interaction

JF - Hyperfine Interaction

SN - 0304-3843

IS - 1-3

ER -