Fast-Growing Field of Magnetically Recyclable Nanocatalysts

Wang, Dong; Astruc, Didier

doi:10.1021/cr500134h

Cited by 741 publications

(351 citation statements)

References 455 publications

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“…Furthermore, it has been shown that nanocatalysts generally do not retain high catalytic activity without a sturdy support. Nanocatalysts without any support are generally unstable, and structural deformation occurs after a single use in catalytic reactions [22][23][24]. The aggregation of nanocatalysts reduces the active surface area, resulting in less effective chemical reactions.…”

Section: Non-magnetic Nanostructured Catalystsmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

185

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This review is focused on the strategies and designs of magnetic nanostructured catalysts showing the enhanced and sustainable catalytic performances for the heterogeneous reduction of nitoaromatics. Magnetic catalysts have the benefits of easy recovery and reuse after the completion of the reactions and green chemical processes. Magnetic separation, among the various procedures for removing catalysts, not only obviates the requirement of catalyst filtration or centrifugation after the completion of reactions, but also provides a practical technique for recycling the magnetized nanostructured catalysts. Consequently, discussions will address the methodologies and exemplars for the reusable magnetic composite catalysts. Because the synthesis of ideal magnetic nanostructured catalysts is of primary importance in the development of high-quality sustainable processes, the designs, preparation methods and recyclability of various recoverable magnetic nanostructured catalysts are emphasized. The representative methods and strategies for the synthesis of durable and reusable magnetic nanostructured catalysts are highlighted. The advantages, disadvantages, recyclability and the efficiency of the introduced heterogeneous systems have been explored in the reduction of nitrobenzene derivatives.

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Section: Non-magnetic Nanostructured Catalystsmentioning

confidence: 99%

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Shokouhimehr

2015

Catalysts

185

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“…[5,6] Therefore, the search for finding new support materials and heterogenization techniques is a hot research topic in modern research in catalysis. Among various solid supports used for the immobilization of metallic catalysts, magnetic nanoparticles have emerged as a robust and high-surface-area heterogeneous catalyst support, because they could not only stabilize the reaction catalytic species, but also improve the catalytic activity [7][8][9][10][11][12] The simple separation of MNPs-supported catalysts from products or mixture reaction by an external magnet is the most notable advantage of magnetic nanoparticles. [13][14][15] It is noteworthy that magnetic-supported catalysts can be reused many times while keeping their initial activity.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Fe3O4 nanoparticles supported imine/Thiophene‐nickel (II) complex: A new and highly active heterogeneous catalyst for the synthesis of polyhydroquinolines and 2, 3‐dihydroquinazoline‐4(1H)‐ones

Shiri

Heidari

Kazemi

2017

Applied Organom Chemis

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A new magnetically separable nickel catalyst (Ni(NO 3 ) 2− Imine/ThiopheneFe 3 O 4 @SiO 2 ) was readily prepared and structurally characterized by Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), Vibrating sample magnetometer (VSM), X-Ray diffraction (XRD) and Atomic absorption spectroscopy (AAS).The Ni(NO 3 ) 2− Imine/Thiophene-Fe 3 O 4 @SiO 2 exhibited efficient catalytic activity in the synthesis of 2,3-dihydroquinazoline-4(1H)-ones and polyhydroquinolines.Catalysis research under water and solvent-free conditions makes also this synthetic protocol ideal and fascinating from the environmental point of view. The catalyst can be magnetically recovered after the reaction and can be reused for many times without appreciable decrease in activity.

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“…Magnetic nanoparticles (MNPs), with the facility for reclaiming and reuse, have been increasingly utilized for water treatments in recent years [24]. The most typical and popular magnetite (Fe 3 O 4 ) NPs not only can be easily recycled by magnetic method, but also hold great potential in in-situ providing Fe 2+ in electrocatalysis [25].…”

Section: Introductionmentioning

confidence: 99%

AuPd/Fe3O4-based three-dimensional electrochemical system for efficiently catalytic degradation of 1-butyl-3-methylimidazolium hexafluorophosphate

Qin

Sun

Liu

et al. 2015

Electrochimica Acta

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Keywords: three-dimensional system AuPd/Fe 3 O 4 ionic liquids kinetic study degradation mechanism A B S T R A C T Ionic liquids (ILs) have been reported to be toxic and harmful to aquatic and terrestrial organisms, thus it is imperative to remove the residual ILs in various effluents. In this work, a three-dimensional (3D) electrocatalytic system with synthesized AuPd/Fe 3 O 4 nanoparticles (NPs) as particle electrodes (PEs) was established for the degradation of typical 1-butyl-3-methylimidazolium ([BMIM]) based ILs. The assynthesized AuPd/Fe 3 O 4 possessed preferable electrochemical properties for in situ supplement of H 2 O 2 and renewable Fe species. This 3D electrocatalytic system exhibited excellent performance with 100% removal rate of BMIM in 90 min under 120 mA, pH 3, and 1 g/L dosage of AuPd/Fe 3 O 4 NPs. Kinetics study revealed that the degradation rule of BMIM well followed the anodic Fenton treatment (AFT) model, in which the variation of the degradation rate was positively correlated with that of dissolved Fe 2+ , while significantly differed from the evolution of H 2 O 2 . Particularly, the appearance of the H 2 O 2 inflection point suggested the optimal effectiveness of AuPd/Fe 3 O 4 -based 3D electrocatalysis. During this electrocatalytic process, the active HO was produced over the AuPd/Fe 3 O 4 PEs, thereby initiated the highly efficient degradation of BMIM into 1-butyl-3-methyl-2,4,5-trioxoimidazolidine, 1-butyl-3-methylurea and N-butyl-formamide as main intermediates. The electrocatalytic stability of the AuPd/Fe 3 O 4 PEs over seven times further indicated the potential applicability for organic wastewater treatment.

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Fast-Growing Field of Magnetically Recyclable Nanocatalysts

Cited by 741 publications

References 455 publications

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Magnetically Separable and Sustainable Nanostructured Catalysts for Heterogeneous Reduction of Nitroaromatics

Magnetic Fe3O4 nanoparticles supported imine/Thiophene‐nickel (II) complex: A new and highly active heterogeneous catalyst for the synthesis of polyhydroquinolines and 2, 3‐dihydroquinazoline‐4(1H)‐ones

AuPd/Fe3O4-based three-dimensional electrochemical system for efficiently catalytic degradation of 1-butyl-3-methylimidazolium hexafluorophosphate

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