| High photocatalytic capacity of porous ceramic-based powder doped with MgO |
Dikra Bouras1, Mamoun Fellah2
, Abla Mecif1, Régis Barillé3, Aleksei Obrosov4, Mohammed Rasheed5 |
1Laboratory of Active Components and Materials, Larbi Ben M’Hidi University, 04000 Oum El Bouaghi, Algeria
2Mechanical Engineering Department, ABBES Laghrour-Khenchela University, PO 1252, 40004 Khenchela, Algeria
3MOLTECH-Anjou, Université d’Angers/UMR CNRS 6200, 2 Bd Lavoisier, 49045 Angers, France
4Department of Physical Metallurgy and Materials Technology, Brandenburg Technical University, 03046 Cottbus, Germany
5Applied Sciences Department, University of Technology-Iraq, Baghdad, Iraq |
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Received: May 20, 2022; Revised: August 22, 2022 Accepted: September 24, 2022. Published online: October 12, 2022. |
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| ABSTRACT |
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To purify water at low cost for our daily life, the effect of ceramic-based (mullite–cristobalite) and (mullite–zircon) powders doped with different amounts of magnesium oxide (MgO) (10 and 20 wt%) was studied. These compounds are made of a local raw material DD3 with addition of zirconia (ZrO2) to create an open porosity. The powders were prepared by the traditional mixing method with the help of an automated crushing. The effect of MgO doping on structural, morphological and photocatalytic properties of the material was studied by various analytical techniques such as X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, infrared, and UV–visible spectrometry. The results of XRD proved that there was a deformation in the crystal structure of the two types of ceramics after addition, which resulted in a shift of the spectra to the right, while SEM proved the presence of pores with a larger size as the proportion of MgO increases. The chemical composition of the basic components of the ceramic compounds as well as the additive was confirmed with EDS and IR spectra. The final results show that ceramics with added zirconia (DD3Z) and doped with 10% of MgO have a better photocatalytic efficiency than ceramics without zirconia. This important effect could be related to the higher rate of porosity, which provides a more active surface. The 10% MgO content showed a high photoactivity of 77.33% in only 15 min. The maximum hydrolysis rate obtained with Orange II was 92.95% after a period of 45 min with DD3Z/MgO powders. |
| Key words:
Ceramics/MgO · Photocatalytic · Visible light · Degradation rate |
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