One-pot synthesis of amine-functionalized graphene oxide by microwave-assisted reactions: an outstanding alternative for supporting materials in supercapacitors

Caliman, Cristiano C.; Mesquita, Alessandra Rezende; Cipriano, Daniel F.; Freitas, Jair C. C.; Cotta, Alexandre Alberto Chaves; Macedo, W. A. A.; Porto, A.O.

doi:10.1039/c7ra13514a

Cited by 112 publications

(58 citation statements)

References 55 publications

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“…17,75,76 For carbon nanotubes and similar materials, the specific capacitance in aqueous electrolytes ranges from 50 to 100 F g -1 , which is in good agreement with the results displayed by the materials in this work. Although many studies present the synthesis of carbon materials with much higher capacitance values, like induced verticalaligned carbon nanotubes and polyaniline nanocomposites (403 F g -1 ), 77 reduced graphene oxide films using a standard LightScribe DVD optical drive (276 F g -1 ) 78 and random single walled nanotubes networks (180 F g -1 ), 79 the synthesis procedures of these carbon materials mostly show great difficulties to scale up the production for commercialization of supercapacitors.…”

Section: Resultssupporting

confidence: 80%

Direct Synthesis of Porous Carbon Materials Prepared from Diethyldithiocarbamate Metal Complexes and Their Electrochemical Behavior

Silva

Porto

Caliman

et al. 2018

J. Braz. Chem. Soc.

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Porous carbon materials were prepared at low temperatures via thermal decomposition of iron, nickel and cobalt N,N-diethyldithiocarbamates (DDT). X-ray diffraction data showed two peaks at 2θ (25.5° and 43.5°) that indicate the presence of graphite-like structures. Raman spectra displayed D and G bands in the range from 1312 to 1321 cm -1 and 1587 to 1593 cm -1 , respectively, which were fitted with 4 components. All spectra showed two low intensity D* (1190 cm ) bands, assigned to sp 2 -sp 3 bonds in disordered carbonaceous materials and amorphous carbon, respectively. Transmission electron microscopy images showed agglomerates of spherical particles formed by graphitic segments. The results showed that the carbon material obtained from iron N, N-diethyldithiocarbamate, Fe(DDT) 3 , is structurally better organized than the others and the pore size distribution curves confirmed that this material presents high degree of mesoporosity. Voltammetric curves obtained using KOH and H 2 SO 4 electrolytes showed hysteresis behavior typical of capacitors charge/discharge process. The carbon material prepared from Fe(DDT) 3 displayed the highest specific capacitance in acidic media, 59 F g -1 , which was associated to its high degree of mesoporosity. Keywords: carbon materials, diethyldithiocarbamate complexes, electrochemical application IntroductionDifferent physical methods have been used to prepare carbon nanomaterials such as laser ablation, 1,2 arch discharge 3,4 and combustion. 5,6 Thermal decomposition of organic and organometallic precursors [7][8][9] has been presented as a viable alternative to physical methods which use harsh synthesis conditions and yield small amount of products. Different carbon-rich precursors are used to obtain these carbon nanostructures, which can be transformed into graphitic carbon materials of different sizes and shapes. Among these organic precursors, alkynes olygoine derivatives are good candidates due to their high chemical instability, which allows them to undergo different chemical reactions. 10 Various carbon precursors such as benzene, 11 sucrose 12 and phenol resin, 13 are also suitable for the synthesis of carbon materials. Similarly, the pyrolysis of organometallic precursors, such as cobalt acetylacetonate, 14 also yields carbon nanostructures presenting good electrochemical performance which depends on surface area as well as the porosity of these structures. The major problem associated with the method described above is the presence of encapsulated metals.Porous carbon materials are excellent candidates for electrodes in supercapacitors. 15,16 For these materials pore accessibility plays a significant role in the charge storage and the specific capacitance reaches a maximum value when the pore size matches the maximum electrolyte ion dimension. 17 For carbon nanomaterials the surface areas range from 300 to 600 m 2 g -1 and are responsible for electrolyte wetting and rapid ionic motions necessary for da Silva et al. 1905 Vol. 29, No. 9, 2018 a satisfactory electroc...

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Section: Resultssupporting

confidence: 80%

Direct Synthesis of Porous Carbon Materials Prepared from Diethyldithiocarbamate Metal Complexes and Their Electrochemical Behavior

Silva

Porto

Caliman

et al. 2018

J. Braz. Chem. Soc.

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“…The stretching frequency appeared at 2200 cm À1 due to the long alkyl chain. 32 The alkyl chain C-H bond vibration appeared at 738 cm À1 . The bond vibration appearing at 1035 cm À1 was associated with an alkyl chain, and the bond appeared at 1052 cm À1 due to the C-O-C stretching frequency.…”

Section: Spectroscopy Studiesmentioning

confidence: 99%

Experimental and computational studies of graphene oxide covalently functionalized by octylamine: electrochemical stability, hydrogen evolution, and corrosion inhibition of the AZ13 Mg alloy in 3.5% NaCl

2020

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“…[ 15,16 ] GO has been considered as an interesting surface support due to easy functionalization, high surface area, good thermal stability, and better dispersion in water and other organic solvents. [ 17,18 ] The strategy of functionalization on the GO sheets include two approaches such as (a) covalent functionalization of the intercalant by the ring opening of epoxides or chemical conjugation on the secondary OH moieties or coupling on the terminal acid moieties [ 19–22 ] and (b) noncovalent interactions on the surface of GO through van der Waals interactions using aromatic substrates. [ 23–26 ] Spyrou et al have demonstrated the intercalation of organic polycyclic aromatic amines in the GO planes and proved that its interaction with GO differs with the size of the intercalants.…”

Section: Introductionmentioning

confidence: 99%

Copper(II) complex intercalated graphene oxide nanocomposites as versatile, reusable catalysts for click reaction

Samuel

Nagarajan

Cidhuraj

et al. 2020

Applied Organom Chemis

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In this work, we report the efficient, high stable copper(II) complexes intercalated graphene oxide (GO) used as green catalysts for copper(II) complex mediated click reaction. Copper(II) Bis(2,2′‐bipyridine) [CuII (bpy)2] (C1) and Copper(II) Bis(1,10‐phenanthroline) [CuII (phen)2] (C2) have synthesized for the intercalation of corresponding nanocomposites with GO, [GO@CuII (bpy)2] (GO‐C1) and [GO@CuII (phen)2] (GO‐C2). The noncovalent interaction of complexes supported on the surface of the GO nanosheets proves as an evident active site to facilitate the enhanced catalytic activity of copper‐catalyzed alkyne azide cycloaddition (CuIIAAC) reaction for the isolation of 1,4‐disubstituted‐1,2,3‐triazoles as click products in shorter reaction time with 80%–91% yield (five examples). The X‐ray diffraction (XRD) pattern of these composites shows the enhanced interlayers d‐spacing range of 1.01–1.12 nm due to the intercalation of copper(II) complexes in between the GO basal planes and characterized by X‐ray photoelectron spectroscopy (XPS), Fourier‐transform infrared spectroscopy (FT‐IR), Raman, UV, scanning electron microscope (SEM), and thermogravimetric analysis (TGA). The as‐prepared nanocomposites were employed for the typical click reactions using the substrates of azide and acetylene. These classes of composite materials can be referred to recyclable, heterogeneous, green catalysts with high atom economy and could also be used for the isolation of click products in biomolecules.

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One-pot synthesis of amine-functionalized graphene oxide by microwave-assisted reactions: an outstanding alternative for supporting materials in supercapacitors

Abstract: A simple and straightforward method using microwave-assisted reactions is presented for the functionalization of graphene oxide with aromatic and non-aromatic amines.

Cited by 112 publications

References 55 publications

Direct Synthesis of Porous Carbon Materials Prepared from Diethyldithiocarbamate Metal Complexes and Their Electrochemical Behavior

Direct Synthesis of Porous Carbon Materials Prepared from Diethyldithiocarbamate Metal Complexes and Their Electrochemical Behavior

Experimental and computational studies of graphene oxide covalently functionalized by octylamine: electrochemical stability, hydrogen evolution, and corrosion inhibition of the AZ13 Mg alloy in 3.5% NaCl

Copper(II) complex intercalated graphene oxide nanocomposites as versatile, reusable catalysts for click reaction

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