Nanogel and super-paramagnetic nanocomposite of thiacalix[4]arene functionalized chitosan: synthesis, characterization and heavy metal sorption

Lakouraj, Moslem Mansour; Hasanzadeh, Fereshteh; Zare‬, Ehsan Nazarzadeh

doi:10.1007/s13726-014-0287-y

Cited by 64 publications

(28 citation statements)

References 28 publications

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“…The nanocomposite of thiacalix [4]arene functionalized chitosan (CS-g-TC4A nanogel and CS-g-TC4A super-paramagnetic nanocomposite) was synthesized to adsorb heavy metal [12]. Superparamagnetic nanocomposite and nanogel as effective nanosorbents based on SA were synthesized [13].…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of patulin from aqueous solution using thiourea modified chitosan resin

Liu

Peng

Chen

et al. 2015

International Journal of Biological Macromolecules

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Section: Introductionmentioning

confidence: 99%

Adsorptive removal of patulin from aqueous solution using thiourea modified chitosan resin

Liu

Peng

Chen

et al. 2015

International Journal of Biological Macromolecules

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“…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. These efforts enable a wide super-paramagnetic nanocomposite [87] variety of industrial applications for magnetic catalysts in the future.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, Lakouraj et al [87] reported a magnetic chitosan grafted thiacalix [4] arene (Fe 3 O 4 -contained CS-g-TC4A) superparamagnetic nanocomposites via click reaction of freshly prepared magnetic chitosan azide with monopropargyl thiacalix [4] arene. The Fe 3 O 4 -contained CS-g-TC4A was evaluated for adsorption of many different metal ion species.…”

Section: Synthesis and Applications Of Dendrimer And Polymer Immobilimentioning

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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“…In another application, a material obtained by immobilization of calixarene to a Wang benzaldehyde resin was used as a chelating material for Cu(I) and Zn(II) [52]. Heavy metal sorption to a thiacalixarene-immobilized chitosane-MNP composite material was studied, and the binding data was evaluated in terms of isotherm models [53]. Sorption of Eu(III) on a thiacalixarenes-immobilized Merrifield resin was studied, and Eu(III) ions were quantitatively extracted from aqueous solutions [62].…”

Section: Sorptionmentioning

confidence: 99%

Calixarene-engineered surfaces and separation science

Gezici

Bayrakcı

2015

J Incl Phenom Macrocycl Chem

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After their discovery, calixarenes have attracted the attention of many researchers from various disciplines. This group of supramolecules has an increasing popularity and this is most probably related with the flexibility of calixarene chemistry. Owing to their multifunctional character and stability, calixarenes became important precursors in separation science to derive new-type of sorbents or stationary phases. Immobilization of calixarenes to a suitable solid support (e.g. silica, synthetic polymers, magnetite nanoparticles, etc.) is a very popular concept being used for this purpose, and various immobilization methodologies have been proposed in the literature. In the present work, some state-of-the-art researches and developments published in the past are reviewed in a collective manner, and thus fundamentals of calixareneimmobilization and the application of the obtained materials in sorption and high performance liquid chromatography are represented.

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Nanogel and super-paramagnetic nanocomposite of thiacalix[4]arene functionalized chitosan: synthesis, characterization and heavy metal sorption

Cited by 64 publications

References 28 publications

Adsorptive removal of patulin from aqueous solution using thiourea modified chitosan resin

Adsorptive removal of patulin from aqueous solution using thiourea modified chitosan resin

Recent advances in catalysts immobilized on magnetic nanoparticles

Calixarene-engineered surfaces and separation science

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