Résumé

This work aims to study and compare the effect of doping with two elements (chromium
and aluminum) and the addition ratio (0, 2, 5, and 8)% on the structural, morphological,
surface, optical, and photocatalysis properties of zinc oxide thin films. Thin layers were
prepared using the sol–gel deposition dip-coating technique on a glass slide. The X-ray
analysis proved that the crystal structure of ZnO is of the type wurtzite; its effect was
evident through a decrease in the intensity of the peaks and their shift towards the most
prominent angles. The results of AFM showed an increase in the surface roughness during
doping, as it gave a more effective surface during the use of Al element than during
the use of Cr. The shape of the spherical grains was confirmed by the SEM device, where
we obtained a larger size of the grains with a porous surface in the case of doping with Al
compared with Cr. Based on the transmittance spectrum, the energy gap of the samples
was calculated, which was found to have increased with doping, where ZnO had an energy
gap of 3.23 eV, and its value in the case of doping with 8% of Cr and Al reached (3.24 and
3.29) eV, respectively. A good surface for the AlZO sample made it more catalytic. It gave
it the most significant gradient rate, estimated at 55.23% during a time of 180 min, compared
to the CrZO sample, which was estimated at 32.99% during the same period.

Information

Item Type:	Journal
Divisions:
ePrint ID:	4410
Date Deposited:	2023-09-13
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/4410

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