1. Physical investigations and photocatalytic activities on ZnO and SnO2 thin films deposited on flexible polymer substrate.
- Author
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Ben Ameur, S., Bel hadjltaief, H., Barhoumi, A., Duponchel, B., Leroy, G., Amlouk, M., and Guermazi, H.
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PHOTOCATALYSIS , *ZINC oxide , *TIN oxides , *THIN film deposition , *IMIDES , *POLYMERS , *PYROLYSIS - Abstract
ZnO and SnO 2 thin films were deposited on glass and Polyetherimide (PEI) flexible substrates by spray pyrolysis deposition at low temperature (250 °C). The structural characterization by X-ray diffraction (XRD) reveals that PEI promotes the crystallization of ZnO and SnO 2 thin films while the films deposited on glass substrate are amorphous. The physical investigations show that ZnO/PEI and SnO 2 /PEI have a good crystalline quality and high transparency in visible range (T>80%). Their gap energies are calculated from absorbance data (3.3 eV for ZnO and 3.72 eV for SnO 2 ). Furthermore, the surface properties are investigated by atomic force microscopy and contact angle measurements. It is found that the ZnO/PEI film has a higher surface roughness (RMS = 20.20 nm ± 0.62 nm) compared to SnO 2 /PEI (RMS = 5.41 nm ± 0.16 nm). The metal oxides (ZnO and SnO 2 ) catalysts exhibit excellent photodegradation activities under UV irradiation up to 80%. The highest activity was observed for ZnO thin films because it exhibits smaller gap energy. Furthermore, both samples show excellent photocatalytic stability. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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