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Sol-gel preparation of pure and doped TiO₂ films for the photocatalytic oxidation of ethanol in air

Iolanda Cimieri, Hilde Poelman UGent, Nursen Avci, Jérémy Geens, Séephanie D Lambert, Benoît Heinrichs and Dirk Poelman UGent (2012) JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY. 63(3). p.526-536
abstract
Stable sols of TiO2 were synthesized by a non-aqueous sol-gel process using titanium (IV) isopropoxide as precursor. The microstructure, optical and morphological properties of the films obtained by spin-coating from the sol, and annealed at different temperatures, were investigated using scanning electron microscopy, transmission electron microscopy, diffuse reflectance spectroscopy and ellipsometry. The crystalline structure of the films was characterized by X-ray diffraction and their photocatalytic activity was evaluated for the oxidation of ethanol in air. The influence of the calcination temperature, pre-heat treatment and the number of layers was studied. Simultaneous thermo-gravimetric and differential thermal analysis measurements were carried out to ascertain the thermal decomposition behavior of the precursors. In order to obtain a higher photoresponse in the visible region, a series of vanadium-, niobium- and tantalum-doped TiO2 catalysts was synthesized by the same sol-gel method. For V doping two different precursors, a vanadium alkoxide and V2O5, were used. The effect on the crystallization and photocatalytic activity of the doped TiO2 films was investigated. Furthermore, to identify the effective composition of the samples, they were characterized by X-ray photoelectron spectroscopy and the surface area of the powders was measured by N-2 adsorption. The 10 wt.% doped catalysts exhibit high photocatalytic activity under visible light and among them the best performance was obtained for the sample containing Ta as dopant. The crystallite sizes are closely related to the photocatalytic activity.
Please use this url to cite or link to this publication:
author
organization
alternative title
Sol-gel preparation of pure and doped TiO2 films for the photocatalytic oxidation of ethanol in air
year
type
journalArticle (original)
publication status
published
subject
keyword
vanadium, TiO2 photocatalyst, air purification, titania, photocatalysis, VOC, Doping effect, Visible photocatalytic activity, THIN-FILMS, TITANIUM-DIOXIDE, OXYGEN DEFICIENCY, VANADIUM, DEPOSITION, TEMPERATURE, CATALYSTS, COATINGS, NIOBIUM, INDIUM
journal title
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
J. Sol-Gel Sci. Technol.
volume
63
issue
3
pages
526 - 536
Web of Science type
Article
Web of Science id
000310162700027
JCR category
MATERIALS SCIENCE, CERAMICS
JCR impact factor
1.66 (2012)
JCR rank
4/26 (2012)
JCR quartile
1 (2012)
ISSN
0928-0707
DOI
10.1007/s10971-012-2815-6
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
3196135
handle
http://hdl.handle.net/1854/LU-3196135
date created
2013-04-18 09:57:53
date last changed
2017-03-09 12:42:51
@article{3196135,
  abstract     = {Stable sols of TiO2 were synthesized by a non-aqueous sol-gel process using titanium (IV) isopropoxide as precursor. The microstructure, optical and morphological properties of the films obtained by spin-coating from the sol, and annealed at different temperatures, were investigated using scanning electron microscopy, transmission electron microscopy, diffuse reflectance spectroscopy and ellipsometry. The crystalline structure of the films was characterized by X-ray diffraction and their photocatalytic activity was evaluated for the oxidation of ethanol in air. The influence of the calcination temperature, pre-heat treatment and the number of layers was studied. Simultaneous thermo-gravimetric and differential thermal analysis measurements were carried out to ascertain the thermal decomposition behavior of the precursors. In order to obtain a higher photoresponse in the visible region, a series of vanadium-, niobium- and tantalum-doped TiO2 catalysts was synthesized by the same sol-gel method. For V doping two different precursors, a vanadium alkoxide and V2O5, were used. The effect on the crystallization and photocatalytic activity of the doped TiO2 films was investigated. Furthermore, to identify the effective composition of the samples, they were characterized by X-ray photoelectron spectroscopy and the surface area of the powders was measured by N-2 adsorption. The 10 wt.\% doped catalysts exhibit high photocatalytic activity under visible light and among them the best performance was obtained for the sample containing Ta as dopant. The crystallite sizes are closely related to the photocatalytic activity.},
  author       = {Cimieri, Iolanda and Poelman, Hilde and Avci, Nursen and Geens, J{\'e}r{\'e}my and Lambert, S{\'e}ephanie D and Heinrichs, Beno{\^i}t and Poelman, Dirk},
  issn         = {0928-0707},
  journal      = {JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY},
  keyword      = {vanadium,TiO2 photocatalyst,air purification,titania,photocatalysis,VOC,Doping effect,Visible photocatalytic activity,THIN-FILMS,TITANIUM-DIOXIDE,OXYGEN DEFICIENCY,VANADIUM,DEPOSITION,TEMPERATURE,CATALYSTS,COATINGS,NIOBIUM,INDIUM},
  language     = {eng},
  number       = {3},
  pages        = {526--536},
  title        = {Sol-gel preparation of pure and doped TiO\unmatched{2082} films for the photocatalytic oxidation of ethanol in air},
  url          = {http://dx.doi.org/10.1007/s10971-012-2815-6},
  volume       = {63},
  year         = {2012},
}

Chicago
Cimieri, Iolanda, Hilde Poelman, Nursen Avci, Jérémy Geens, Séephanie D Lambert, Benoît Heinrichs, and Dirk Poelman. 2012. “Sol-gel Preparation of Pure and Doped TiO₂ Films for the Photocatalytic Oxidation of Ethanol in Air.” Journal of Sol-gel Science and Technology 63 (3): 526–536.
APA
Cimieri, I., Poelman, H., Avci, N., Geens, J., Lambert, S. D., Heinrichs, B., & Poelman, D. (2012). Sol-gel preparation of pure and doped TiO₂ films for the photocatalytic oxidation of ethanol in air. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 63(3), 526–536.
Vancouver
1.
Cimieri I, Poelman H, Avci N, Geens J, Lambert SD, Heinrichs B, et al. Sol-gel preparation of pure and doped TiO₂ films for the photocatalytic oxidation of ethanol in air. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY. 2012;63(3):526–36.
MLA
Cimieri, Iolanda, Hilde Poelman, Nursen Avci, et al. “Sol-gel Preparation of Pure and Doped TiO₂ Films for the Photocatalytic Oxidation of Ethanol in Air.” JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 63.3 (2012): 526–536. Print.