Study of the photocatalytic and sensor properties of ZnO/SiO{sub 2} nanocomposite layers

ZnO/SiO{sub 2} nanocomposite layers are deposited onto glass substrates by the sol-gel method. The fraction of SiO{sub 2} is 20%. The layers are produced by single or double deposition and sol centrifugation. To study the photocatalytic properties of the samples, experiments are performed on the dec...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2013-12, Vol.47 (12)
Main Authors: Bozhinova, A. S., Kaneva, N. V., Kononova, I. E., Nalimova, S. S., Syuleiman, Sh. A., Papazova, K. I., Dimitrov, D. Ts, Moshnikov, V. A., Terukov, E. I.
Format: Article
Language:English
Subjects:
AQUEOUS SOLUTIONS
COMPOSITE MATERIALS
DECOMPOSITION
DEPOSITION
DEPOSITS
EFFICIENCY
IRRADIATION
MATERIALS SCIENCE
NANOSTRUCTURES
OXALATES
PHOTOCATALYSIS
PROPANOLS
SENSITIVITY
SENSORS
SILICA
SILICON OXIDES
SOL-GEL PROCESS
SPECTROSCOPY
SUBSTRATES
ZINC OXIDES
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Summary:ZnO/SiO{sub 2} nanocomposite layers are deposited onto glass substrates by the sol-gel method. The fraction of SiO{sub 2} is 20%. The layers are produced by single or double deposition and sol centrifugation. To study the photocatalytic properties of the samples, experiments are performed on the decomposition of Malachite Green oxalate in aqueous solutions under the action of light in the ultra-violet and visible (UV/VIS) spectral ranges. The gas-sensitive properties of the layers are examined by impedance spectroscopy in various gas atmospheres. In all experiments, double-layer ZnO/SiO2 nanocomposites exhibit a higher efficiency, compared with the rest of the samples, irrespective of the irradiation type. The double-layer samples also show the best sensitivity to acetone and isopropanol vapors.
ISSN:1063-7826
1090-6479
DOI:10.1134/S106378261312004X