Porosity properties of porous ceramic substrates added with zinc and magnesium material

Bouras, Dikra; Mecif, A.; Barille, Régis; Harabi, Abdelhamid; Zaabat, Mourad

doi:10.1016/j.ceramint.2020.05.114

Cited by 11 publications

(10 citation statements)

References 34 publications

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“…The primary material used in the production of the ceramic substrates is a local clay of the Djebel Debbagh region (DD3). This raw material was chosen because of its availability in our country, the ease of extraction and good quality [11]. It consists mainly of SiO 2 (51 wt%), Al 2 O 3 (47 wt%) and 2 wt% of other oxides.…”

Section: Methodsmentioning

confidence: 99%

“…After each optical measurement, the absorbance spectra were measured. The rate of decomposition and degradation of the colored solution was calculated using the following relationship [11,27,28]:…”

Section: Measurement Of Photocatalytic Activitymentioning

confidence: 99%

“…The materials are produced by the erosion of the bedrock, as most of the kaolin-based materials, are the result of granite deposits with aluminum silicate decomposition and deposition after transportation by winds and rivers [10]. The chemical formula of pure kaolin is (Al 2 O 3 •2SiO 2 •2H 2 O) with an estimated composition of: 39.53% of Al 2 O 3 , 46.50% of SiO 2 , and 13.95% of H 2 O [11]. Kaolin is not naturally pure and have impurity percentages varying according to the nature of the materials [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…The application of heterogeneous photocatalysis is one of the most common applications to eliminate the toxicity and contaminants of colored organic dyes, especially Orange II due to its important industrial use [11]. Photocatalysis allows the decomposition of dyes through chemical reactions with the catalysts having the following properties: chemical stability, zero toxicity, and high sensitivity to light [15].…”

Section: Introductionmentioning

confidence: 99%

“…The first one was extracted from the kaolinite type DD3 and the second one was prepared from the kaolinite type DD3 + 38% ZrO 2 (DD3Z) after heat treatment. The presence of zirconium oxide (ZrO 2 ) in this clay leads to the formation of zircon (ZrSiO 4 ) with a high degree of open porosity estimated at 33% after consuming the silica in the glass phase [11,12].…”

Section: Introductionmentioning

confidence: 99%

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High photocatalytic capacity of porous ceramic-based powder doped with MgO

Bouras

Fellah

Mecif

et al. 2022

J. Korean Ceram. Soc.

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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.

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Section: Methodsmentioning

confidence: 99%

Section: Measurement Of Photocatalytic Activitymentioning

confidence: 99%