Résumé

Aiming at purifying water at low cost for our daily life, thin layers of zinc oxide and
copper doped ZnO are deposited on ceramic pellets based on cristobalite, mullite and
zircon. These substrates are made with local raw material to which zirconia is added so as
to create open porosity. The thin films are prepared by sol-gel method. The effect of
copper doping on their structural, morphological and photocatalytic properties has been
studied by different analytical techniques such as X-ray diffraction, atomic force
microscopy, scanning electron microscopy, energy-dispersive X-ray spectrometry and
UV-visible spectrophotometry. The photocatalytic activity has been carried out on an
aqueous solution of Orange II insolated with a UV lamp. The final results show that only
the porous substrates obtained with addition of zirconia and coated with active layers of
ZnO or Cu doped ZnO give an important photocatalytic activity. This important effect can
be related to the high rate of open porosity in the substrates caused by the consumption of
the vitreous phase by zirconia. The open pores allow having a wider surface covered with
the active film. The obtained maximum degradation rate of Orange II is 77.76% for an
exposition time of 6 hours with ZnO:Cu thin film deposited on porous substrates.

Information

Item Type:	Journal
Divisions:
ePrint ID:	4407
Date Deposited:	2023-09-13
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/4407

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