Covalent amino-functionalisation of single-wall carbon nanotubes

Gromov, Andrey; Dittmer, Staffan; Svensson, Johannes; Nerushev, Oleg; Pérez‐García, Sergio Alfonso; Licea‐Jiménez, Liliana; Rychwalski, Rodney; Campbell, Eleanor E. B.

doi:10.1039/b504282h

Cited by 106 publications

(63 citation statements)

References 49 publications

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“…Briefly, this treatment consisted in the oxidation of the carbon material in order to introduce oxygen functionalities that, afterwards, were converted into nitrogen functionalities through an amidation treatment. In a last step, the post-conversion of the formed amides into amine functional groups was achieved by a Hofmann rearrangement [12]. The modification protocol allowed the incorporation of different nitrogen functionalities.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen doped superporous carbon prepared by a mild method. Enhancement of supercapacitor performance

Mostazo‐López

Ruiz-Rosas

Morallón

et al. 2016

International Journal of Hydrogen Energy

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Nitrogen functionalization (ca. 4 at. % N XPS ) of a highly microporous activated carbon (S BET >3000m 2 /g) has been achieved by two different approaches at mild conditions: (i) oxidation and post-reaction with nitrogen reactants, and (ii) direct reaction of pristine carbon material with nitrogen reactants. Interestingly, the introduction of nitrogen functionalities allows full preservation of the microporosity when pathway (ii) is followed. The electrochemical performance of the carbon materials as electrodes for supercapacitors was evaluated by using symmetric and asymmetric configuration in 1M H 2 SO 4 . Both nitrogen-functionalized carbon materials showed larger stability and energy efficiency than the pristine carbon material when working at 1.4V. The non-oxidized and functionalized activated carbon evidences the best performance as electrode for supercapacitor, providing energy and power density of 14.5 Wh/kg and 61.2 kW/kg and keeping 83% of original capacitance after 5000 charge-discharge cycles.This improvement is related to the presence of surface nitrogen functionalities that provide a higher electrochemical stability, avoiding the formation of detrimental oxygen groups during the operation of the supercapacitor.

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Section: Introductionmentioning

confidence: 99%

Nitrogen doped superporous carbon prepared by a mild method. Enhancement of supercapacitor performance

Mostazo‐López

Ruiz-Rosas

Morallón

et al. 2016

International Journal of Hydrogen Energy

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“…The Mb molecule is a globular protein with multiple amino acid groups on its outer surface. Owing to a strong interaction of amino groups with CNTs, [6,[21][22][23] Mb molecules can be easily and tightly attached to nanotubes to lead to the functionalization and suspension in water of MWCNTs. The Mb molecules attached to MWCNTs still contain free amino groups with positive charges in a pH < 7 solution, there- Optically transparent and electrically conductive nanocomposite thin films consisting of multiwalled carbon nanotubes (MWCNTs), gold nanoparticles (GNPs) and myoglobin molecules that glue GNPs and MWCNTs together are fabricated for the first time on glass substrates from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Thin Films Composed of Multiwalled Carbon Nanotubes, Gold Nanoparticles and Myoglobin for Humidity Detection at Room Temperature

Wei

Honma

et al. 2007

ChemPhysChem

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Optically transparent and electrically conductive nanocomposite thin films consisting of multiwalled carbon nanotubes (MWCNTs), gold nanoparticles (GNPs) and myoglobin molecules that glue GNPs and MWCNTs together are fabricated for the first time on glass substrates from aqueous solution. The nanocomposite thin film is capable of varying its resistance, impedance or optical transmittance at room temperature in response to changes in ambient humidity. The conductometric sensitivity to relative humidity (RH) of the nanocomposite thin film is compared with those of the pure and Mb-functionalized MWCNT layers. The pure MWCNT layer shows a small increase in its resistance with increasing RH due to the effect of p-type semiconducting nanotubes present in the film. In contrast, a four times higher sensitivity to RH is observed for both the nanocomposite and Mb-functionalized MWCNT thin films. The sensitivity enhancement is attributable to swelling of the thin films induced by water absorption in the presence of Mb molecules, which increases the inter-nanotube spacing and thereby causes a further increase of the film resistance. A humidity change as low as DeltaRH=0.3 % has been readily detected by conductometry using the nanocomposite thin film.

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“…In order to improve the hydrophilicity and the dispersity of carbon nanotubes, a great many of researches such as oxidation with HNO 3 [11][12][13], or mixed acid H 2 SO 4 /HNO 3 (1:1; 1:1.6; 3:1; 3:2, v/v) [14][15][16][17] have been reported in recent years. It proved that acid oxidation could not only remove the amorphous carbon in the carbon nanotubes but improve the dispersity, concentration and the stability of CNTs in polar solvent.…”

Section: Introductionmentioning

confidence: 99%

Tip and inner walls modification of single-walled carbon nanotubes (3.5 nm diameter) and preparation of polyamide/modified CNT nanocomposite reverse osmosis membrane

Wang

Yang

Gao

et al. 2017

Journal of Experimental Nanoscience

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(2018) Tip and inner walls modification of single-walled carbon nanotubes (3.5 nm diameter) and preparation of polyamide/modified CNT nanocomposite reverse osmosis membrane, Journal of Experimental Nanoscience, 13:1, 11-26, DOI: 10.1080/17458080.2017 ABSTRACTTo enhance the water flux and salt rejection of reverse osmosis membranes, thin film nanocomposite reverse osmosis membranes were prepared by incorporating functionalised single-walled carbon nanotubes (SWNTs). The functionalised SWNTs were obtained by chemical process such as mixed acid oxidation and substitution reaction. The SWNTs were characterised by HRTEM, FTIR, TGA, Raman spectra, UV-Vis and XPS, etc. The surface morphology and structure of membrane were characterised by SEM and contact angle measurement, respectively. The results showed that carboxyl, acyl, amide and amine were successfully grafted on the tip and inner wall of the single-walled carbon nanotubes. The dispersity of the functionalised SWNTs in water was tested, indicating a good hydrophilic property. The polyamide/modified CNT nanocomposite reverse osmosis membrane was prepared. Compared with the bare polyamide membrane, the SWNT-polyamide thin film nanocomposite membranes showed higher property in hydrophilic surface and its water flux, as along with salt rejection, improved dramatically. The experimental results revealed that the modified SWNTs (especially those containing hydrophilic groups such as carboxyl groups and amino groups) well dispersed in the polyamide thin film layer, and hence improved the water permeation, and the salt rejection. KEYWORDSSingle-walled carbon nanotubes; inner/surface modification; SWNTpolyamide nanocomposite membranes; water flux and salt rejection ABBREVIATION CNTs: carbon nanotubes

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Covalent amino-functionalisation of single-wall carbon nanotubes

Cited by 106 publications

References 49 publications

Nitrogen doped superporous carbon prepared by a mild method. Enhancement of supercapacitor performance

Nitrogen doped superporous carbon prepared by a mild method. Enhancement of supercapacitor performance

Thin Films Composed of Multiwalled Carbon Nanotubes, Gold Nanoparticles and Myoglobin for Humidity Detection at Room Temperature

Tip and inner walls modification of single-walled carbon nanotubes (3.5 nm diameter) and preparation of polyamide/modified CNT nanocomposite reverse osmosis membrane

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