Composites beads based on Fe3O4@MCM-41 and calcium alginate for enhanced catalytic reduction of organic dyes

Hachemaoui, Mohammed; Mokhtar, Adel; Mekki, Amel; Zaoui, Farouk; Abdelkrim, Soumia; Hacini, Salih; Boukoussa, Bouhadjar

doi:10.1016/j.ijbiomac.2020.07.128

Cited by 64 publications

(9 citation statements)

References 77 publications

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“…In particular, the DG3-Cu-US catalyst shows a higher rate constant compared with the reported catalysts. 12,39,60,75,76 This efficiency is related to different parameters such as the size and dispersion of the nanoparticles in the matrix as well as the nature of the matrix which is a hyperbranched polymer based on citric acid, containing many active sites that can fix and stabilize the metal ions.…”

Section: Catalytic Reduction Of Mb Dyementioning

confidence: 99%

“…[7][8][9] The use of metallic nanoparticles has become a very common application in chemistry; this is due to varied application fields among them environmental, electronic, optical, and biological. [10][11][12][13][14][15][16] There are a variety of metals with good photocatalytic and antimicrobial activity such as gold, silver, copper, and zinc. [17][18][19][20][21] However, copper is one the most exploited metals for its effectiveness against various organic pollutants, pathogenic bacteria, and fungi.…”

Section: Introductionmentioning

confidence: 99%

“…The use of metallic nanoparticles has become a very common application in chemistry; this is due to varied application fields among them environmental, electronic, optical, and biological 10–16 . There are a variety of metals with good photocatalytic and antimicrobial activity such as gold, silver, copper, and zinc 17–21 .…”

Section: Introductionmentioning

confidence: 99%

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Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Zaoui

Daouadji

Beldjilali

et al. 2023

Applied Organom Chemis

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A new dendrimer based on citric acid and sebacoyl chloride was synthesized by Steglich esterification. The obtained dendrimer was used as a matrix for the dispersion of copper nanoparticles using classical and ultrasound methods. All materials were characterized by FTIR, 1H NMR, thermogravimetric analysis, X-ray photoelectron spectrometry, scanning electron microscopy, and energ-ydispersive -X-ray spectroscopy. The obtained nanocomposites were tested against two Gram-positive pathogenic bacteria (Bacillus cereus and Staphylococcus aureus), two Gram negative (Escherichia coli and Pseudomonas aeruginosa), the organic dye methylene blue, and in the 1,1-diphenyl-2-picrylhydrazile radical scavenging assay. A comparative study between both methods in structural, morphological, and thermal properties as well as in the antimicrobial, antioxidant, and catalytic reduction activities was provided. All nanocomposites showed an excellent activity for all applications. The comparison between both synthesis methods shows the superiority of the sonication methods, especially via the catalytic reduction and the antioxidant activities, the classic method allows better thermal stability and a higher metal content with some cationic oxidation state in the obtained nanocomposites, but ultrasound allows a better dispersion with a fully reduced metal.

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Section: Catalytic Reduction Of Mb Dyementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Zaoui

Daouadji

Beldjilali

et al. 2023

Applied Organom Chemis

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“…Ferrous ions (Fe 2+ ), the main reducing product of nZVI, also possess a strong reductive ability towards contaminants. 18,19 With unique reactive surfaces, nZVI can adsorb and transform organic and inorganic contaminants through reductive or oxidative pathways. 20 However, rapid aggregation and formation of a passivation surface layer when exposed to dissolved oxygen and/or water reduces their reactivity.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of a potential magnetic and mesoporous EG-nZVI/CA-MCM41 nanocomposite for reductive sorption of europium

Jena,

Mahanty,

Deka

et al. 2024

Environ. Sci.: Nano

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“…However, the recovery of the powder after the catalytic test is difficult due to their small particle sizes, which can lead to secondary pollution. To overcome this problem, several attempts were proposed, in which encapsulation by a polymer matrix is known to be a promoter pathway [ 16 ]. Alginates, as natural polysaccharides produced by brown algae, are widely used as polymer matrices due to their high bioavailability and low cost.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Activated Carbon-Reinforced Composite Beads Based on MnO2/MCM-41@Fe3O4 and Calcium Alginate for Efficient Removal of Tetracycline in Aqueous Solutions

Zheng,

Shi,

Zhang

et al. 2024

Polymers

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Tetracycline (TC) is a common antibiotic; when untreated TC enters the environment, it will cause a negative impact on the human body through the food chain. In the present study, MnO2/MCM-41@Fe3O4 (FeMnMCM) prepared using a hydrothermal and redox method and Camellia oleifera shell-activated carbon (COFAC) prepared through alkali activation were encapsulated using alginate (ALG) and calcium chloride as a cross-linking matrix to give the composite beads COFAC–FeMnMCM–ALG. The resultant COFAC–FeMnMCM–ALG composite beads were then carefully characterized, showing a high immobilization of MnO2/MCM-41@Fe3O4, with porous COFAC as an effective bioadsorbent for enriching the pollutants in the treated samples. These bead catalysts were subsequently applied to the oxidative degradation of TC in a Fenton oxidation system. Several parameters affecting the degradation were investigated, including the H2O2 concentration, catalyst dosage, initial TC concentration, and temperature. A very high catalytic activity towards the degradation of TC was demonstrated. The electron paramagnetic resonance (EPR) and quenching results showed that ·OH and ·O2− were generated in the system, with ·OH as the main radical species. In addition, the COFAC–FeMnMCM–ALG catalyst exhibited excellent recyclability/reusability. We conclude that the as-prepared COFAC–FeMnMCM–ALG composite beads, which integrate MnO2 and Fe3O4 with bioadsorbents, provide a new idea for the design of catalysts for advanced oxidation processes (AOPs) and have great potential in the Fenton oxidation system to degrade toxic pollutants.

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Composites beads based on Fe3O4@MCM-41 and calcium alginate for enhanced catalytic reduction of organic dyes

Cited by 64 publications

References 77 publications

Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Classical and ultrasonic preparation of new dendrimer–Copper nanocomposites: Application in the catalytic reduction, antioxidant, and antimicrobial activities

Green synthesis of a potential magnetic and mesoporous EG-nZVI/CA-MCM41 nanocomposite for reductive sorption of europium

Preparation of Activated Carbon-Reinforced Composite Beads Based on MnO2/MCM-41@Fe3O4 and Calcium Alginate for Efficient Removal of Tetracycline in Aqueous Solutions

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