Natural Clay Modified with ZnO/TiO2 to Enhance Pollutant Removal from Water

Mahy, Julien; Tsaffo Mbognou, Marlène Huguette; Léonard, Clara; Fagel, Nathalie; Djoufac Woumfo, Emmanuel; Lambert, Stéphanie

doi:10.3390/catal12020148

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Natural Clay Modified with ZnO/TiO2 to Enhance Pollutant Removal from Water

Mahy, Julien; Tsaffo Mbognou, Marlène Huguette; Léonard, Clara et al.

2022 • In Catalysts, 12, p. 148

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/268061

DOI
10.3390/catal12020148

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Keywords :

smectite; adsorption; photocatalysis; pollutant removal; environment remediation

Abstract :

[en] Raw clays, extracted from Bana, west Cameroon, were modified with semiconductors (TiO2 and ZnO) in order to improve their depollution properties with the addition of photocatalytic properties. Cu2+ ions were also added to the clay by ionic exchange to increase the specific surface area. This insertion of Cu was confirmed by ICP-AES. The presence of TiO2 and ZnO was confirmed by the detection of anatase and wurzite, respectively, using X-ray diffraction. The composite clays showed increased specific surface areas. The adsorption property of the raw clays was evaluated on two pollutants, i.e., fluorescein (FL) and p-nitrophenol (PNP). The experiments showed that the raw clays can adsorb FL but are not efficient for PNP. To demonstrate the photocatalytic property given by the added semiconductors, photocatalytic experiments were performed under UVA light on PNP. These experiments showed degradation up to 90% after 8 h of exposure with the best ZnO-modified clay. The proposed treatment of raw clays seems promising to treat pollutants, especially in developing countries.

Disciplines :

Chemical engineering
Materials science & engineering
Chemical engineering
Materials science & engineering

Author, co-author :

Mahy, Julien ; Université de Liège - ULiège > Department of Chemical Engineering > Nanomaterials, Catalysis, Electrochemistry

Tsaffo Mbognou, Marlène Huguette

Léonard, Clara

Fagel, Nathalie ; Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires

Djoufac Woumfo, Emmanuel

Lambert, Stéphanie ; Université de Liège - ULiège > Department of Chemical Engineering > Nanomaterials, Catalysis, Electrochemistry

Language :

English

Title :

Natural Clay Modified with ZnO/TiO2 to Enhance Pollutant Removal from Water

Publication date :

25 January 2022

Journal title :

Catalysts

eISSN :

2073-4344

Publisher :

MDPI AG, Basel, Switzerland

Volume :

Pages :

148

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 10 February 2022

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