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Physicochemical and Photocatalytic Properties under Visible Light of ZnO-Bentonite/Chitosan Hybrid-Biocompositefor Water Remediation

Aadnan, Imane ; Zegaoui, Omar ; El Mragui, Abderrahim ; Esteves da Silva, Joaquim Carlos Gomes

Nanomaterials (Basel, Switzerland), 2021-12, Vol.12 (1), p.102 [Periódico revisado por pares]

Switzerland: MDPI AG

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Título:
Physicochemical and Photocatalytic Properties under Visible Light of ZnO-Bentonite/Chitosan Hybrid-Biocompositefor Water Remediation
Autor: Aadnan, Imane ; Zegaoui, Omar ; El Mragui, Abderrahim ; Esteves da Silva, Joaquim Carlos Gomes
Assuntos: Adsorption ; Aluminum oxide ; Bentonite ; Biomedical materials ; Biopolymers ; Chitosan ; Composite materials ; Dyes ; Fourier transforms ; Functional groups ; hybrid-biocomposite ; mechanism ; Metals ; methyl orange ; Nanoparticles ; Optical properties ; Photocatalysis ; Remediation ; Sedimentation & deposition ; Silica ; Silicon dioxide ; Spectroscopy ; Spectrum analysis ; Synthesis ; Thermal measurement ; Thermal stability ; visible light ; Water treatment ; X ray photoelectron spectroscopy ; Zinc ; Zinc oxide ; ZnO-bentonite/chitosan
É parte de: Nanomaterials (Basel, Switzerland), 2021-12, Vol.12 (1), p.102
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: In this investigation, a hybrid-biocomposite "ZnO-Bentonite/Chitosan" was synthesized using inexpensive and environmentally friendly materials (Bentonitechitosan) and (ZnO). It was used as a photocatalyst for water remediation. The structural, optical, thermal, and morphological properties of the synthesized hybrid-biocomposite were investigated using XRD, FTIR spectroscopy, UV-vis diffuse reflectance spectroscopy, TGA, XPS, and SEM-EDS. The thermal measurements showed that the decomposition of CS was postponed progressively by adding PB and ZnO, and the thermal stability of the synthesized hybrid-biocomposite was improved. The characterization results highlighted strong interactions between the C-O, C=O, -NH , and OH groups of chitosan and the alumina-silica sheets of bentonite on the one side, and between the functional groups of chitosan (-NH , OH) and ZnO on the other side. The photocatalytic efficiency of the prepared hybrid-biocomposite was assessed in the presence of Methyl Orange (MO). The experiments carried out in the dark showed that the MO removal increased in the presence of Zn-PB/CS hybrid-biocomposite (86.1%) by comparison with PB (75.8%) and CS (65.4%) materials. The photocatalytic experiments carried out under visible light showed that the MO removal increased 268 times in the presence of Zn-PB/CS by comparison withZnO.The holes trapping experiments indicated that they are the main oxidative active species involved in the MO degradation under both UV-A and visible light irradiations.
Editor: Switzerland: MDPI AG
Idioma: Inglês

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Physicochemical and Photocatalytic Properties under Visible Light of ZnO-Bentonite/Chitosan Hybrid-Biocompositefor Water Remediation

Aadnan, Imane ; Zegaoui, Omar ; El Mragui, Abderrahim ; Esteves da Silva, Joaquim Carlos Gomes

Switzerland: MDPI AG

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