Physico-chemical properties of zinc partially substituted magnetite nanoparticles

Zubir, Nor Aida; Costa, João C. Diniz da; Yacou, Christelle; Motuzas, Julius; Zhang, Xiwang

doi:10.1063/1.4965084

Cited by 7 publications

(11 citation statements)

References 15 publications

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“…Magnetically active GO‐Fe 3 O 4 nanocomposites were synthesized by the da Costa group via co‐precipitating iron salts onto GO sheets in basic solution (Scheme ) …”

Section: Resultsmentioning

confidence: 99%

2‐Arylation/alkylation of benzothiazoles using superparamagneticgraphene oxide‐Fe₃O₄ hybrid material as a heterogeneous catalystwith diisopropyl azodicarboxylate (DIAD) as an oxidant

Khalili

Etemadi‐Davan

Banazadeh

2017

Applied Organom Chemis

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In this report, we introduced Graphene oxide‐iron oxide (GO‐Fe3O4) nanocomposites as a heterogeneous catalyst for arylation/alkylation of benzothiazoles with aldehydes and benzylic alcohols in the presence of diisopropyl azodicarboxylate (DIAD) as an oxidant which exclusively produced 2‐aryl (alkyl)‐1H–benzothizoles in moderate to excellent yields. The absence of precious metals and toxic solvent, easy product isolation, and recyclability of the GO‐Fe3O4 with no loss of activity are notable advantages of this method.

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“…Magnetically active GO‐Fe 3 O 4 nanocomposites were synthesized by the da Costa group via co‐precipitating iron salts onto GO sheets in basic solution (Scheme ) …”

Section: Resultsmentioning

confidence: 99%

2‐Arylation/alkylation of benzothiazoles using superparamagneticgraphene oxide‐Fe₃O₄ hybrid material as a heterogeneous catalystwith diisopropyl azodicarboxylate (DIAD) as an oxidant

Khalili

Etemadi‐Davan

Banazadeh

2017

Applied Organom Chemis

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“…The absence of the peak at 707.6 eV after heat treatment indicates the absence of direct CFe bonds . The O1s peak for MWF1 was deconvoluted into a peak at 529.9 eV, corresponding to FeO/FeOC bonds and other peaks at 531.4, 533.5, and 534.1 eV, ascribed to COC/COH, COOH, and adsorbed H 2 O, respectively (Figure c) . Thus, the attachment of α‐Fe 2 O 3 particles to the MW surface is mainly promoted by two interacting modes, namely, electrostatic attraction and chelation of the metal oxides by the oxygen‐containing groups.…”

Section: Resultsmentioning

confidence: 98%

Biomimetic Spider‐Web‐Like Composites for Enhanced Rate Capability and Cycle Life of Lithium Ion Battery Anodes

Bhattacharya

Kota

Suh

et al. 2017

Advanced Energy Materials

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sluggish solid-state ion diffusion along the principal axis perpendicular to the basal plane, which makes LIBs inapplicable for high energy and power-demanding applications. [5] In order to overcome the low capacity of graphite, various transition metal oxides have been investigated due to their higher theoretical capacities, achieved via a conversion mechanism. However, the practical application of transition metal oxides in high energy LIBs is hindered by the poor cycling stability and rate capability of these oxides, which are respectively associated with the large volume changes that occur during the charge/discharge cycling and the low electronic conductivity. [6] Various carbonaceous materials, such as carbon nanotubes (CNTs), graphenes, porous carbon, hollow nanospheres, carbon capsules, graphene nanoribbons, and graphene nanosheets, have been used to resolve the aforementioned problems in the form of nanocomposites or hybrids due to their large surface area and extraordinary electronic and mechanical properties. [7][8][9][10][11][12] In particular, numerous approaches have been made to develop CNT/ metal oxide composites; [7] however, satisfactory performance has not yet been achieved. This is mainly due to the aggregation and bundling of the CNTs, arising from strong van der Waals and π-π interactions, which leads to loss of the available surface area and higher Li + ion diffusion resistance. The synergistic combination of a 3D architecture with heterocomposition may provide a large accessible area, alleviate the volume expansion, and create short solid-state diffusion pathways, resulting in the enhanced rate and cyclic capabilities. [13] Nonetheless, the strong attachment of the active materials onto the carbon supports and the proximate contact need to be achieved to exploit the synergistic advantages of both components. [14] Biomimetic design inspired by nature's structures and functions is of prime importance for resolving the existing technological challenges. Such biomimetic approaches have been employed to resolve issues related to the performances of energy storage devices and materials, which are otherwise difficult to overcome with conventional artificial methodologies. For instance, Liu and co-workers mimicked the structural design of the Gecko's foot to improve the adhesion between a copperbased current collector and graphitic anode material, thereby achieving a dramatic increase of the LIB lifespan. [15] Moreover, It is crucial to control the structure and composition of composite anode materials to enhance the cell performance of such anode materials for lithium ion batteries. Herein, a biomimetic strategy is demonstrated for the design of high performance anode materials, inspired by the structural characteristics and working principles of sticky spider-webs. Hierarchically porous, sticky, spider-web-like multiwall carbon nanotube (MWCNT) networks are prepared through a process involving ozonation, ice-templating assembly, and thermal treatment, thereby integrating the networks with γ-Fe 2...

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“…have reported almost complete degradation of rhodamine B dye, using copper sulfide nanocrystals as catalysts, in a H 2 O 2 ‐assisted photocatalytic process over 120 min. In order to overcome the disadvantage of catalyst nanoparticles agglomeration and consecutive efficiency loss, the nanoparticles combination with graphene materials has been reported as an effective strategy, presenting additional advantages such as charge separation improvement, reducing charge recombination and good particles dispersion, thus globally improving the catalytic activity [17,25,40–43] . Furthermore, the high surface area and the π‐π* character of the graphene sheets can favor the aromatic pollutants adsorption and posterior degradation [44–46] .…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the high surface area and the π‐π* character of the graphene sheets can favor the aromatic pollutants adsorption and posterior degradation [44–46] . In fact, Zubir et al [40] . reported an enhanced catalytic performance of a Fe 3 O 4 /graphene composite for Acid Orange 7 degradation – 20 % more pollutant degradation than Fe 3 O 4 NPs alone.…”

Section: Introductionmentioning

confidence: 99%

Graphene@Metal Sulfide/Oxide Nanocomposites as Novel Photo‐Fenton‐like Catalysts for 4‐Nitrophenol Degradation

et al. 2021

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Herein, S‐doped graphene flakes‐based composites with Fe3O4 and/or CuS nanoparticles (NPs) are reported as photo‐Fenton catalysts for the 4‐nitrophenol (4‐NP) degradation. The S‐doped graphene flakes (S‐GF) were prepared using a thermal treatment approach, and the nanocomposites by the in situ growth of Fe3O4 and/or CuS onto the S‐GF scaffold. The characterization methods confirmed the formation of two‐ and three‐components nanocomposites. The Fe3O4 NPs presented a cubic inverse spinel structure and the CuS phases a covellite structure, both with smaller crystallite sizes in the nanocomposites. The new nanocomposites showed higher ability to catalyze the photo‐Fenton 4‐NP degradation than the individual components. The S‐GF@CuS−Fe3O4 nanocomposite exhibited the best catalytic activity: 95.2 % of 4‐NP degradation, a kinetic of pseudo‐first order (k=0.016 min−1), high photo‐Fenton catalytic stability and catalyst's composition/structure preservation. The CuS NPs showed an important role in the photo‐Fenton‐like catalytic activity improvement.

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Physico-chemical properties of zinc partially substituted magnetite nanoparticles

Cited by 7 publications

References 15 publications

2‐Arylation/alkylation of benzothiazoles using superparamagneticgraphene oxide‐Fe₃O₄ hybrid material as a heterogeneous catalystwith diisopropyl azodicarboxylate (DIAD) as an oxidant

2‐Arylation/alkylation of benzothiazoles using superparamagneticgraphene oxide‐Fe₃O₄ hybrid material as a heterogeneous catalystwith diisopropyl azodicarboxylate (DIAD) as an oxidant

Biomimetic Spider‐Web‐Like Composites for Enhanced Rate Capability and Cycle Life of Lithium Ion Battery Anodes

Graphene@Metal Sulfide/Oxide Nanocomposites as Novel Photo‐Fenton‐like Catalysts for 4‐Nitrophenol Degradation

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Physico-chemical properties of zinc partially substituted magnetite nanoparticles

Cited by 7 publications

References 15 publications

2‐Arylation/alkylation of benzothiazoles using superparamagneticgraphene oxide‐Fe3O4 hybrid material as a heterogeneous catalystwith diisopropyl azodicarboxylate (DIAD) as an oxidant

2‐Arylation/alkylation of benzothiazoles using superparamagneticgraphene oxide‐Fe3O4 hybrid material as a heterogeneous catalystwith diisopropyl azodicarboxylate (DIAD) as an oxidant

Biomimetic Spider‐Web‐Like Composites for Enhanced Rate Capability and Cycle Life of Lithium Ion Battery Anodes

Graphene@Metal Sulfide/Oxide Nanocomposites as Novel Photo‐Fenton‐like Catalysts for 4‐Nitrophenol Degradation

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2‐Arylation/alkylation of benzothiazoles using superparamagneticgraphene oxide‐Fe₃O₄ hybrid material as a heterogeneous catalystwith diisopropyl azodicarboxylate (DIAD) as an oxidant

2‐Arylation/alkylation of benzothiazoles using superparamagneticgraphene oxide‐Fe₃O₄ hybrid material as a heterogeneous catalystwith diisopropyl azodicarboxylate (DIAD) as an oxidant