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Improved photocatalytic activity of polymer-modified TiO₂ films obtained by a wet chemical route

Jian Li UGent, Petra Lommens UGent, Els Bruneel UGent and Isabel Van Driessche UGent (2012) JOURNAL OF MATERIALS SCIENCE. 47(17). p.6366-6374
abstract
Porous TiO2 films, exhibiting improved photocatalytic activity compared with commercial materials, have been deposited on glass. The films were dipcoated from a polymer-modified TiO2 precursor solution, containing about 90 vol% water as solvent. The addition of water-soluble polymers such as polyethyleneglycol and polyvinylalcohol has produced TiO2 films with different morphologies, exhibiting RMS roughnesses of up to 60 nm and increased porosity. We studied the effect of the polymers on the morphology and surface topography of a series of polymer-modified TiO2 films and evaluated how their presence in the precursor influences the crystallinity, optical transmittance and most importantly, the photocatalytic activity of the films. X-ray diffraction analysis shows that all films exhibit the anatase crystal structure after calcining for 2 h at 500 A degrees C. We find that the presence of polyethyleneglycol inhibits the crystallization of the TiO2 films. Transmittance spectra show that most of the polymer-modified TiO2 films obtained in this work are transparent although high polymer content can lead to opaque films because of increased porosity and surface roughness. The surface morphology of the films was studied by scanning electron microscopy and atomic force microscopy. Their photocatalytic efficiency was studied by following the decomposition of methylene blue under UV irradiation. The activity of the reference TiO2 film obtained from a precursor without polymers is comparable to that of Saint-Gobain (SG) self-cleaning Bioclean glass, while some of the polymer-modified films show efficiencies that can be up to seven times higher.
Please use this url to cite or link to this publication:
author
organization
alternative title
Improved photocatalytic activity of polymer-modified TiO2 films obtained by a wet chemical route
year
type
journalArticle (original)
publication status
published
subject
keyword
DIP-COATING METHOD, SOL-GEL PROCESS, MESOPOROUS TITANIA, TITANIA THIN-FILMS, POLY(ETHYLENE GLYCOL), SOLUTION DEPOSITION, FABRICATION, DIOXIDE, MICROSTRUCTURE, DEGRADATION
journal title
JOURNAL OF MATERIALS SCIENCE
J. Mater. Sci.
volume
47
issue
17
pages
6366 - 6374
Web of Science type
Article
Web of Science id
000305233200019
JCR category
MATERIALS SCIENCE, MULTIDISCIPLINARY
JCR impact factor
2.163 (2012)
JCR rank
57/239 (2012)
JCR quartile
1 (2012)
ISSN
0022-2461
DOI
10.1007/s10853-012-6561-5
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2987731
handle
http://hdl.handle.net/1854/LU-2987731
date created
2012-09-17 10:02:49
date last changed
2012-09-17 14:10:39
@article{2987731,
  abstract     = {Porous TiO2 films, exhibiting improved photocatalytic activity compared with commercial materials, have been deposited on glass. The films were dipcoated from a polymer-modified TiO2 precursor solution, containing about 90 vol\% water as solvent. The addition of water-soluble polymers such as polyethyleneglycol and polyvinylalcohol has produced TiO2 films with different morphologies, exhibiting RMS roughnesses of up to 60 nm and increased porosity. We studied the effect of the polymers on the morphology and surface topography of a series of polymer-modified TiO2 films and evaluated how their presence in the precursor influences the crystallinity, optical transmittance and most importantly, the photocatalytic activity of the films. X-ray diffraction analysis shows that all films exhibit the anatase crystal structure after calcining for 2 h at 500 A degrees C. We find that the presence of polyethyleneglycol inhibits the crystallization of the TiO2 films. Transmittance spectra show that most of the polymer-modified TiO2 films obtained in this work are transparent although high polymer content can lead to opaque films because of increased porosity and surface roughness. The surface morphology of the films was studied by scanning electron microscopy and atomic force microscopy. Their photocatalytic efficiency was studied by following the decomposition of methylene blue under UV irradiation. The activity of the reference TiO2 film obtained from a precursor without polymers is comparable to that of Saint-Gobain (SG) self-cleaning Bioclean glass, while some of the polymer-modified films show efficiencies that can be up to seven times higher.},
  author       = {Li, Jian and Lommens, Petra and Bruneel, Els and Van Driessche, Isabel},
  issn         = {0022-2461},
  journal      = {JOURNAL OF MATERIALS SCIENCE},
  keyword      = {DIP-COATING METHOD,SOL-GEL PROCESS,MESOPOROUS TITANIA,TITANIA THIN-FILMS,POLY(ETHYLENE GLYCOL),SOLUTION DEPOSITION,FABRICATION,DIOXIDE,MICROSTRUCTURE,DEGRADATION},
  language     = {eng},
  number       = {17},
  pages        = {6366--6374},
  title        = {Improved photocatalytic activity of polymer-modified TiO\unmatched{2082} films obtained by a wet chemical route},
  url          = {http://dx.doi.org/10.1007/s10853-012-6561-5},
  volume       = {47},
  year         = {2012},
}

Chicago
Li, Jian, Petra Lommens, Els Bruneel, and Isabel Van Driessche. 2012. “Improved Photocatalytic Activity of Polymer-modified TiO₂ Films Obtained by a Wet Chemical Route.” Journal of Materials Science 47 (17): 6366–6374.
APA
Li, Jian, Lommens, P., Bruneel, E., & Van Driessche, I. (2012). Improved photocatalytic activity of polymer-modified TiO₂ films obtained by a wet chemical route. JOURNAL OF MATERIALS SCIENCE, 47(17), 6366–6374.
Vancouver
1.
Li J, Lommens P, Bruneel E, Van Driessche I. Improved photocatalytic activity of polymer-modified TiO₂ films obtained by a wet chemical route. JOURNAL OF MATERIALS SCIENCE. 2012;47(17):6366–74.
MLA
Li, Jian, Petra Lommens, Els Bruneel, et al. “Improved Photocatalytic Activity of Polymer-modified TiO₂ Films Obtained by a Wet Chemical Route.” JOURNAL OF MATERIALS SCIENCE 47.17 (2012): 6366–6374. Print.