Recent Advances in the Application of Magnetic Nanoparticles as a Support for Homogeneous Catalysts

Govan, Joseph; Gun’ko, Yurii K.

doi:10.3390/nano4020222

Cited by 279 publications

(143 citation statements)

References 89 publications

(107 reference statements)

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“…Further interesting development is the stabilization of polymer, dendrimer or polydentate ligands on magnetic nanoparticles that enable effective removal of toxic transition metal ion species. This technique provides appropriate industrial applications in pharmaceutical products, food additives and other sectors [88]. Finally, future endeavors for more efficient protocols will still focus on the stability, sustainability, environmental impact and significant cost and energy savings because of the growing needs of industry.…”

Section: Discussionmentioning

confidence: 99%

Recent advances in catalysts immobilized on magnetic nanoparticles

Mokhtary

2016

J IRAN CHEM SOC

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2]. Furthermore, enhancing the percentages of exposed highly reactive facets, at nanoscale, does improve the efficiency of materials in various applications such as photocatalysis and dye-sensitized solar cells [3]. By presenting individual properties, nanoparticles can become a kind of structure unit, in other words, "artificial atoms" to conduct a new type of materials which have difficult in estimating collective properties [4]. Through green nanotechnology, we can get contrivable nanomaterial that contains unique characters which bulk materials never have [5]. This means that we are creating materials with good catalytic activity, stability and more selectivity via changing their forms, sizes and morphologies [6]. Applications of nanoparticles in catalytic reactions are because as size decreases, the surface area-to-volume ratio increases, which enhanced interaction between the reactant and the catalyst, which are needed for high catalytic efficiencies [7]. Unsupported nanoparticles are often less stable, and usually coagulation is inevitable during the catalytic reactions [8]. To generate stable nanoparticles with good activity, stabilizing the surface is required. Protection has been performed by the addition of polymers or longchain alkyl surfactants with polar functional groups that attached to the nanoparticle surface via covalent or electrostatic interactions [9, 10]. Alternatively, nanoparticles have been immobilized or grafted onto inorganic supports to improve their stabilization and recycling ability [12]. Progress in the discovery of new support materials for the heterogenization of homogeneous catalysts has been periodically reviewed [13]. In this article, the green catalytic processes and recent advances in organic transformations catalyzed by magnetically retrievable catalysts (MRCs) are highlighted. Prior to this, methods for the synthesis of catalysts immobilized on magnetic nanoparticles will be addressed briefly.Abstract Unsupported nanoparticles are often less stable, and usually coagulation is unavoidable during the catalytic reactions. To generate stable nanoparticles with good activity, stabilizing the surface is required. Protection has been performed by the addition of polymers or long-chain alkyl surfactants with polar functional groups that attached to the nanoparticle surface via covalent or electrostatic interactions. Alternatively, nanoparticles have been immobilized or grafted onto inorganic supports to improve their stabilization and recycling ability. In this article, the green catalytic processes and recent advances in organic transformations catalyzed by magnetically retrievable catalysts are reviewed. Prior to this, methods for the synthesis of catalysts immobilized on magnetic nanoparticles are addressed briefly.

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Section: Discussionmentioning

confidence: 99%

Recent advances in catalysts immobilized on magnetic nanoparticles

Mokhtary

2016

J IRAN CHEM SOC

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“…nanoparticles, nanofibers, nanoporous materials) are developed and used to immobilize enzymes [1][2][3][4]. Nanostructured materials offer a large surface area and high effective enzyme loading.…”

Section: Introductionmentioning

confidence: 99%

Xylan-Degrading Catalytic Flagellar Nanorods

et al. 2015

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Flagellin, the main component of flagellar filaments, is a protein possessing polymerization ability. In this work a novel fusion construct of xylanase A from B. subtilis and Salmonella flagellin was created which is applicable to build xylan-degrading catalytic nanorods of high stability. The FliC-XynA chimera when overexpressed in a flagellin deficient Salmonella host strain was secreted into the culture medium by the flagellum-specific export machinery allowing easy purification. Filamentous assemblies displaying high surface density of catalytic sites were produced by ammonium-sulfate-induced polymerization. FliC-XynA nanorods were resistant to proteolytic degradation and preserved their enzymatic activity for a long period of time. Furnishing enzymes with self-assembling ability to build catalytic nanorods offers a promising alternative approach to enzyme immobilization onto nanostructured synthetic scaffolds.

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“…Moreover, nanosupports containing magnetic properties are very easy to collect from the reaction mixture. Magnetic nanoparticles (MNPs) based supports have shown their potential for the immobilization of various enzymes, especially α-amylases [28][29][30][31]. In this review article an effort has been made to survey the recent literature based on the immobilization of amylolytic enzymes on/within nanomaterials.…”

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confidence: 99%

Nanomaterials as novel supports for the immobilization of amylolytic enzymes and their applications: A review

Husain¹

2017

Biocatalysis

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Numerous types of nanoparticles and nanocomposites have successfully been employed for the immobilization and stabilization of amylolytic enzymes; α-amylases, β-amylases, glucoamylases and pullulanases. Nano-support immobilized amylolytic enzymes retained very high activity and yield of immobilization. The immobilization of these enzymes, particularly α-amylases and pullulanases, to the nanosupports is helpful in minimizing the problem of steric hindrances during binding of substrate to the active site of the enzyme. The majority of nano-support immobilized amylolytic enzymes exhibited very high resistance to inactivation induced by different kinds of physical and chemical denaturants and these immobilized enzyme preparations maintained very high activity on their repeated and continuous uses. Amylolytic enzymes immobilized on nano-supports have successfully been applied in food, fuel, textile, paper and pulp, detergent, environmental, medical, and analytical fields.

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Recent Advances in the Application of Magnetic Nanoparticles as a Support for Homogeneous Catalysts

Cited by 279 publications

References 89 publications

Recent advances in catalysts immobilized on magnetic nanoparticles

Recent advances in catalysts immobilized on magnetic nanoparticles

Xylan-Degrading Catalytic Flagellar Nanorods

Nanomaterials as novel supports for the immobilization of amylolytic enzymes and their applications: A review

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