Synthesis and characterization of NiFe2O4 nanoparticles as reusable magnetic nanocatalyst for organic dyes catalytic reduction: Study of the counter anion effect

Bernaoui, Cheikh Reda; Bendraoua, Abdelaziz; Zaoui, Farouk; Gallardo, Juan Jesús; Navas, Javier; Boudia, Rafik Abdelkrim; Djediai, Houria; Goual, Nor el Houda; Adjdir, Mehdi

doi:10.1016/j.matchemphys.2022.126793

Cited by 33 publications

(6 citation statements)

References 84 publications

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“…The distance between the BE of Ti 2p3/2 and Ti 2p1/2 was around 5.8 eV, which is coherent with previous results [47]. the main peak at a BE about 530 eV [48], which is assigned to O 2− in the TiO2 structure [49], and other contribution at higher BE, which is typically assigned to adsorbed species, such as hydroxyl groups, or water [50]. is also confirmed in this sample.…”

Section: Fig 2asupporting

confidence: 91%

TiO2/WO3/graphene for photocatalytic H2 generation and benzene removal: widely employed still an ambiguous system

Chakib

Karmaoui

Bekka

et al. 2023

Preprint

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Clean energy, as well as air and water pollution, have become key challenges in today's society. Photocatalysis could be one of the ways to address them. It is considered as an advanced oxidation method that involves light to activate a semiconductor. Semiconductors based on titanium dioxide (TiO2) are widely regarded as photocatalytically active materials. However, the performance of TiO2 has limitations due to its wide band gap (~3.2 eV), and a high recombination rate of the photo-generated electron-hole (e−−h+) pair. To overcome these drawbacks, TiO2 in heterojunction with tungsten trioxide (WO3) is well recognized as one of the most explored systems for photocatalytic applications. Depending on the synthesis technique, and the photocatalytic application, various yet contrasting behaviour can be found in the literature. In this work, the photocatalytic properties of the TiO2/WO3 system were thoroughly examined in the removal of gaseous benzene, and generation of H2. Graphene nanoplatelets were included into the TiO2/WO3 system to increase transport and life-time of the photo-generated exciton. The investigation of various parameters that affected the photocatalytic activity of synthesised materials were carried out, including the ratio of WO3 to TiO2, the presence of graphene, and the nature of the photocatalytic application. It has been observed that the position of the conduction bands played indeed a key-role in case of hydrogen generation. A type II heterojunction was found in the TiO2/WO3 system. Modification of TiO2/WO3 with graphene nanoplatelets improved the photocatalytic hydrogen generation, which was particularly evident in samples with higher WO3 content. The most significant increase in hydrogen production was observed with the photocatalyst with 15 mol% WO3 and 1 wt% graphene − a five-fold increase in yield, compared to its counter-part with no graphene.

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Section: Fig 2asupporting

confidence: 91%

TiO2/WO3/graphene for photocatalytic H2 generation and benzene removal: widely employed still an ambiguous system

Chakib

Karmaoui

Bekka

et al. 2023

Preprint

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“…We can observe the peaks of sebacoyl chloride as well as those of citric acid. First of all, we have a singlet at 1.30 ppm, which corresponds to the protons of CH 2 in the aliphatic chain of positions (4-5-6-7), and the multiplet at 1.60 ppm is assigned to CH 2 of positions (3-8); at 2.29 ppm, we have a triplet that corresponds to the CH 2 of positions (2)(3)(4)(5)(6)(7)(8)(9). We also have a quadruplet at 2.6 and 2.9 ppm of the CH 2 protons of citric acid (a, b) as AB system.…”

Section: H Nmr/ftir Studymentioning

confidence: 99%

“…Indeed, the usual antibiotics are generally ineffective, and unfortunately, most of the good antibiotics found in the literature are inefficient for removing organic pollutants and vice versa, so they can be used in one application and not in the other. Therefore, modern science is always looking for new materials with both properties and which are easy to synthesize, inexpensive, and effective; among the alternatives researchers have found, metallic nanoparticles are one of the best choices 7–9 …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, modern science is always looking for new materials with both properties and which are easy to synthesize, inexpensive, and effective; among the alternatives researchers have found, metallic nanoparticles are one of the best choices. [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.…”

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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“…size was accomplished employing the esteemed Scherrer's formula: D = k/b cos y, wherein D represents the crystallite size, k denotes a dimensionless shape factor, l signifies the wavelength of radiation, b denotes the full width at half of the maximum peak (FWHM) measured in radians, and y symbolizes the Bragg angle associated with the crystallographic plane under consideration 47. In this particular investigation, the crystallographic plane of interest corresponds to the (111) plane, who's relative 2y angle is 38.61, known for its characteristic affiliation with silver (Ag).…”

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confidence: 99%

Petroleum sludge ash-derived MCM-41-silver nanocomposites for enhanced photocatalysis and antimicrobial effect in water treatment

Goual,

Alaoui,

Bendraoua

et al. 2023

New J. Chem.

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Synthesis and characterization of NiFe2O4 nanoparticles as reusable magnetic nanocatalyst for organic dyes catalytic reduction: Study of the counter anion effect

Cited by 33 publications

References 84 publications

TiO2/WO3/graphene for photocatalytic H2 generation and benzene removal: widely employed still an ambiguous system

TiO2/WO3/graphene for photocatalytic H2 generation and benzene removal: widely employed still an ambiguous system

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

Petroleum sludge ash-derived MCM-41-silver nanocomposites for enhanced photocatalysis and antimicrobial effect in water treatment

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