Nanoparticle‐Based Catalysis using Supramolecular Hydrogels

Léger, B.; Menuel, S.; Ponchel, A.; Hapiot, F.; Monflier, Éric

doi:10.1002/adsc.201100888

Cited by 40 publications

(23 citation statements)

References 28 publications

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“…There are many application of ILs, including catalytic media . Also, hydrogels, with their highly water‐swollen nature and various formulations, sizes, and morphology, can be used for the preparation of metal nanoparticles and catalysts for various reactions …”

Section: Introductionmentioning

confidence: 99%

Metal‐ion‐containing ionic liquid hydrogels and their application to hydrogen production

Şahiner

Alpaslan

2013

J of Applied Polymer Sci

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A cationic hydrogel synthesized from (3-acrylamidopropyl) trimethyl ammonium chloride as poly [(3-acrylamidopropyl) trimethyl ammonium chloride] [p(APTMACl)] was put into contact with the chloride salts of metals such as CoCl 2 , NiCl 2 , and CuCl 2 in ethanol. The metal-loaded p(APTMACl) hydrogels were used as catalyst systems in hydrogen generation from the hydrolysis of sodium borohydride (NaBH 4 ) and ammonia borane. The activation energy values for the hydrolysis reaction were calculated for all of the catalyst systems and were found to be 53. 43 respectively. These activation parameters were better than values reported in the literature for the ionic liquid metal complexes of smaller molecules used for the same purpose.

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Section: Introductionmentioning

confidence: 99%

Metal‐ion‐containing ionic liquid hydrogels and their application to hydrogen production

Şahiner

Alpaslan

2013

J of Applied Polymer Sci

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“…Scheme 13 Polyrotaxane synthesized by Gao and coworkers [38] Scheme 14 Thermoresponsive N-alkylpyridiniumamphiphile-(a-CD) 2 hydrogel obtained by self-assembly [40] Scheme 12 Polypseudorotaxanes formed by the self-assembly of PEG and CDs [36] Handbook 2015 metal NPs synthesis leading CDs to fill other tasks ( Table 6). The active phase could already be synthesized with well-defined size, and the cyclodextrin could play the role of mass transfer of the substrate close to the metal surface.…”

Section: Cyclodextrin Addition After Metal Nps Synthesismentioning

confidence: 99%

“…Magnetic FePt nanoparticles were synthesized by the thermal decomposition of iron carbonyl in the presence of oleic acid and oleylamine in dibenzyl ether. After precipitation, the resulting particles were redispersed in Scheme 16 RaMe-b-CD Ru NPs synthesis [42] Scheme 15 Thermoregulated Ru NPs catalyzed hydrogenation of alkenes [40] [44] hexane and then transferred in water by addition of g-CD through the formation of inclusion complexes between surface-bound molecules and cyclodextrins (Scheme 17). The FePt nanoparticles, capped byg-CD, had a mean diameter of 2.5 nm and exhibited superparamagnetic behavior at 300 K with zero remanence and coercivity.…”

Section: Cyclodextrin Addition After Metal Nps Synthesismentioning

confidence: 99%

“…The inclusion of organic molecules inside cyclodextrins could lead under specific conditions to the formation of a hydrogel [39]. Monflier and coworkers have taken advantage of the hydrogel template properties to access size-controlled ruthenium NPs [40]. First of all, the polypseudorotaxane template was prepared from the mixture of the N-alkylpyridiniumamphiphile [py-N-(CH 2 ) 12 OC 6 H 3 -3,5-(OMe) 2 ] + (Br À ) and a-CD (Scheme 14) [41].…”

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confidence: 99%

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Cyclodextrins as Multitask Agents in Nanocatalysis

Noël¹,

Léger²,

Ponchel³

et al. 2015

Handbook of Nanoparticles

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The efficiency of colloidal metallic particles in catalysis is closely related to their stability in the course of reaction. The choice of the capping agent is therefore critical as it controls both the size and shape of the particles, but also the dispersion of the metal core, while providing long-term stability. Among the wide variety of protective agents, cyclodextrins (cyclic oligosaccharides formed of glucopyranose units) have proven to be effective for synthesizing metallic nanoparticles by bottom-up chemical processes. The first examples in the literature emphasize the use of native cyclodextrins as metal nanoparticles (NPs) stabilizers but major improvements concerning the stability and catalytic activity of NPs either in the form of colloidal suspensions or immobilized onto supports were done by using chemically modified cyclodextrins. Indeed, appropriate functionalizations can lead to beneficial effects in the cyclodextrin affinity toward metal species and mass transfer of the substrate during the catalytic processes. It clearly appears that cyclodextrins can act as multitask agents from the formation (growth and nucleation process) of metal nanoparticles to the catalytic activity enhancement via specific interactions with the substrate. They can also be used to form supramolecular adducts with inorganic metal salts leading to heterogeneous catalysts with a homogeneous particles dispersion onto the support.

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“…By virtue of the unique three-dimensional network structure and various functional groups (hydroxyl, amine, carboxylic acid, and sulfonic acid groups), hydrogels play important roles in many fields, for example, they are used in superabsorbent materials [18], drug-delivery carriers [19], wastewater decontamination processes [20], biosensors [21], catalyst carriers [22], and other applications [23]. From the application point of view, the use of hydrogels in adsorption of heavy-metal ions from aqueous solutions has attracted a lot of attention due to their higher adsorption rate and capacity.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive features of poli(acrylic acid-co-hydroxyapatite) composite for $$ {{\text{UO}}_{ 2}}^{{ 2 { + }}} $$ UO 2 2 +

Liu

Duan

et al. 2015

J Radioanal Nucl Chem

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The copolymer of poli(acrylic acid-co-hydroxyapatite) (PAA-HAP) was prepared and characterized by means of FT-IR and SEM analysis. The adsorptive features of PAA-HAP for UO 2 2þ was studied as a function of pH, adsorbent dosage, initial metal ion concentration and temperature. The adsorption isotherm data fitted well to the Langmuir isotherm model. The adsorbed UO 2 2þ can be desorbed effectively by 0.1 M HNO 3 . The maximum adsorption capacities for UO 2 2þ of the dry PAA-HAP was 1.86 9 10 -4 mol/g. The high adsorption capacity and kinetics results indicate that PAA-HAP can be used as an alternative adsorbent to remove UO 2 2þ from aqueous solution.

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Nanoparticle‐Based Catalysis using Supramolecular Hydrogels

Cited by 40 publications

References 28 publications

Metal‐ion‐containing ionic liquid hydrogels and their application to hydrogen production

Metal‐ion‐containing ionic liquid hydrogels and their application to hydrogen production

Cyclodextrins as Multitask Agents in Nanocatalysis

Adsorptive features of poli(acrylic acid-co-hydroxyapatite) composite for $$ {{\text{UO}}_{ 2}}^{{ 2 { + }}} $$ UO 2 2 +

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