The influence of optical irradiation on the sorption properties of fullerene materials

Samonin, V. V.; Nikonova, V. Yu.; Спиридонова, Е. А.

doi:10.1134/s0036024407080183

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…Similar facts have been noted for a organics vapors [43]. To improve the sorption properties of fullerene black, it can be irradiated with visible light [44] or it can be used for creation of a composite sorbent with polyacrylamide [45]. At the same time, accounting for the solubility of fullerenes in aromatic hydrocarbons, the possibility to use fullerenes or products containing them as sorbents is rather doubtful.…”

Section: Fig 2 -N-hexane Dehydrocyclization Schemementioning

confidence: 71%

Fullerene black: Structure, properties and possible applications

Kushch

Kuyunko

2011

Russ J Gen Chem

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This review concerns the fullerene black, a poorly known nano-sized carbon material, the insoluble residue after extraction of fullerenes from fullerene soot produced by arc evaporation of carbon material (usually graphite) in a helium atmosphere. This by-product of the production of fullerenes, whose yield reaches 80 wt %, is a finely dispersed material with a particle size of 40-50 nm. It includes amorphous carbon, graphitized particles, and graphite. Test reactions showed the presence in the structure of fullerene black of curved surfaces, and, like fullerenes, of alternating non-conjugated simple and double bonds. In addition to the double bonds, its structure includes dangling bonds in the concentration not higher than one per 1200 carbon atoms. This nano-carbon can not be graphitized, enters into the reactions of nucleophilic addition, and absorbs oxygen and water from the atmosphere. The fullerene black as was shown activate hydrogen and thus to undergoes to a hydrogenolysis without a catalyst and to catalyzes the dehydrogenation and dehydrocyclization of alkanes. This carbon nanomaterial can be used as a sorbent for organics, as a catalyst support, as a tribotechnical additive; and it can interact with carbide-forming metals and reinforces their surface.

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Section: Fig 2 -N-hexane Dehydrocyclization Schemementioning

confidence: 71%

Fullerene black: Structure, properties and possible applications

Kushch

Kuyunko

2011

Russ J Gen Chem

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“…Various forms of fullerene (C 60 , C 70 , fullerene nan otubes, fullerene soot) exhibit adsorption activity to organic solvents [2,3] and metal ions [4]. This prop erty of nanoparticles is used in modification of the sur face of inorganic materials with the purpose of increasing their surface activity [5,6].…”

Section: Interactionmentioning

confidence: 99%

“…IR spectra of the films: (1) polystyrene, (2) the composite containing 0.1% C 60 ,(3,4), polystyrene and composite saturated with Cu(II) ions (A-transmission; ν-wavenumber, cm -1 ) Relative intensities of the absorption bands in the spectra of polystyrene (PS) and of the composite + C 60 is the composite film containing 0.1 wt % C 60 PS + Cu(II); PS + C 60 + Cu(II) are the polystyrene film and the composite film saturated with Cu(II) ions.…”

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confidence: 99%

Sorption properties of fullerene-modified polystyrene

Bagrovskaya

Алексеева

2012

Prot Met Phys Chem Surf

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INTERACTIONFullerene/polymer composites are promising materials for various fields of industry, medicine, and pharmacology. This is owing to the fact that modifica tion of polymers with carbon nanoparticles improves their physicochemical properties, such as conductive, optical, mechanical, and catalytic characteristics, and promotes the occurrence of new properties, e.g., bio logical activity [1].Various forms of fullerene (C 60 , C 70 , fullerene nan otubes, fullerene soot) exhibit adsorption activity to organic solvents [2, 3] and metal ions [4]. This prop erty of nanoparticles is used in modification of the sur face of inorganic materials with the purpose of increasing their surface activity [5,6].At present, there are publications devoted to func tionalization of synthetic polymers with fullerene by various methods [7][8][9]. Among other polymers, poly styrene is of interest, since it, being an electron donor polymer macromolecule, forms a noncovalent link with an electron acceptor molecule of C 60 during its functionalization with fullerene in solutions of aro matic hydrocarbons [8]. The modification of polysty rene with fullerene may be suggested to lead to an increase in the specific surface of the produced films and to an enhancement in the sorption activity of the composites. Moreover, styrene/divinylbenzene copol ymers are raw materials for commercial manufactur ing cationites and the development of sorbent based on polystyrene modified with carbon nanoclusters may allow significant extension of the choice of sor bents. For quantitative assessment of how the proper ties of the polymer surface alter after modification, its adsorption characteristics can be used.In this connection, the purpose of the present work is to investigate the effect of modification of polysty rene with fullerene on its sorption properties with respect to heavy metal ions. EXPERIMENTALAs an object in this work, we selected atactic poly styrene with М 1 × 10 5 . Fullerene, C 60 , containing 95.5% of the main material was purchased from Fullerene Technologies, St. Petersburg. The modifi cation of polystyrene with carbon nanoparticles was performed in the following way: the weighed samples of polymer and fullerene (C 60 ) were separately dis solved in o xylene; then, their solutions were mixed in needed proportions. The fraction of C 60 in the com posite was varied from 0.01 to 0.1 wt %. The films were obtained by spreading a polymer solution over a glass substrate and holding it until complete evaporation of the solvent. The films obtained were transparent 70 µm in thickness and had a sufficient mechanical strength. The modified polystyrene film was of light violet color, whose intensity depended on the concen tration of fullerene in the composite. The sorption properties of polystyrene and modified polystyrene films with respect to Cu(II), Ni(II), Zn(II), and Cd(II) were studied under the static mode at 293 K. The kinetics of sorption of heavy metal ions from aqueous solutions of their sulfates on the initial and modified polystyre...

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“…It is known that various forms of fullerene (C 60 , C 70 , fullerene nanotubes, fullerene black) exhibit adsorption capacity for organic solvents [4,5] and metal ions. Doping of polymers with fullerenes makes it possible to obtain materials with improved sorption characteristics.…”

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confidence: 99%

Sorption of heavy metal ions by cellulose modified with fullerene

2015

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Сеlulose was modifi ed by impregnation of the polymer with a solution of C 60 nanocarbon particles in ortho-xylene. Specifi c features of the sorption kinetics of Cu(II),Ni(II), and Cd(II) ions on cellulose and composite materials were researched. Pseudo-fi rst-and pseudo-second-order kinetic models were used to determine the quantitative characteristics of the process. It was demonstrated that the sorption effi ciency of metal ions on fullerene-containing cellulose substantially increases. The improvement of the sorption properties of the modifi ed polymer is due to the increase in the concentration of active sorption properties and to a change in the structure of the sorbent.Cellulose is one of the most abundant biopolymers having a permanently renewable raw material resources base and fi nds wide application in manufacture of paper, fi bers, membranes, and sorbents and in medicine and pharmaceutics. Natural cellulose materials effectively recover heavy metal ions from aqueous electrolyte solutions, exhibit selectivity, are easily regenerated, and remain operable in aqueous-organic media [1].

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The influence of optical irradiation on the sorption properties of fullerene materials

Cited by 6 publications

References 8 publications

Fullerene black: Structure, properties and possible applications

Fullerene black: Structure, properties and possible applications

Sorption properties of fullerene-modified polystyrene

Sorption of heavy metal ions by cellulose modified with fullerene

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