Characterization methods of carbon nanotubes: a review

Belin, T.; Epron, Florence

doi:10.1016/j.mseb.2005.02.046

Cited by 792 publications

(398 citation statements)

References 143 publications

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“…1 illustrates XRD patterns of electrode materials, as well as their components: graphite oxide and MWNTs. In the structure of MWNTs pattern sharp peak at the angle 2θ of 25.96°can be found, which can be indexed as the diffraction pattern of its (0 0 2) crystal face [23]. High angle diffraction peaks observed at Bragg angels of 43.4°, 53.8°and 77.3°can be matched to crystal faces (1 0 0), (0 0 4) and (0 0 6), respectively.…”

Section: Characterizationmentioning

confidence: 90%

Graphene oxide-multiwalled carbon nanotubes composite as an anode for lithium ion batteries

Majchrzycki

Walkowiak

Martyła

et al. 2016

Materials Science-Poland

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Nowadays reduced graphene oxide (rGO) is regarded as a highly interesting material which is appropriate for possible applications in electrochemistry, especially in lithium-ion batteries (LIBs). Several methods were proposed for the preparation of rGO-based electrodes, resulting in high-capacity LIBs anodes. However, the mechanism of lithium storage in rGO and related materials is still not well understood. In this work we focused on the proposed mechanism of favorable bonding sites induced by additional functionalities attached to the graphene planes. This mechanism might increase the capacity of electrodes. In order to verify this hypothesis the composite of non-reduced graphene oxide (GO) with multiwalled carbon nanotubes electrodes was fabricated. Electrochemical properties of GO composite anodes were studied in comparison with similarly prepared electrodes based on rGO. This allowed us to estimate the impact of functional groups on the reversible capacity changes. As a result, it was shown that oxygen containing functional groups of GO do not create, in noticeable way, additional active sites for the electrochemical reactions of lithium storage, contrary to what has been postulated previously.

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Section: Characterizationmentioning

confidence: 90%

Graphene oxide-multiwalled carbon nanotubes composite as an anode for lithium ion batteries

Majchrzycki

Walkowiak

Martyła

et al. 2016

Materials Science-Poland

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“…Raman analysis of carbon nanotubes monitors peaks such as radial breathing mode due to the innermost tube diameter of MWCNTs, 48 the G-band due to the tangential in-plane C-C stretching vibrations, 46 Raman allowed phonon mode (E 2(g) ), 49 the D-band which is due to the A (g1) mode 50 and 2D band which is the first overtone of the D-and the G-bands. 51 For each nanocomposite an average of three spectra were used and the Dand the G-bands were fitted using a Lorenztian function.…”

Section: Raman Spectroscopic Analysismentioning

confidence: 99%

Multiwalled carbon nanotube-titania nanocomposites: Understanding nano-structural parameters and functionality in dye-sensitized solar cells

Mombeshora¹,

Simoyi²,

Nyamori³

et al. 2015

S.Afr.j.chem

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Nanocomposites consisting of multiwalled carbon nanotubes and titania were synthesized by two methods, namely, sol-gel and chemical vapour deposition (CVD) methods. The work takes advantage of the bridging ability of nanotechnology between macromolecules and the solid state process in engineering alternative nanomaterials for various applications including solar cell fabrication. Physical and chemical characterization of the mesoporous nanocomposites from the two synthetic methods were investigated using Raman spectroscopy, thermogravimetric analysis, Fourier transformation infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, surface characterization and X-ray diffraction analysis. Physicochemical properties in the nanocomposites such as thermal stability, pore volume, crystallinity and surface area were observed to be a subject of MWCNT: titania ratios and synthetic methods. From the CVD synthetic method, observed attributes include more uniform and smoother coating; better crystallinity and larger pore width than sol-gel method. On the other hand, nanocomposites from sol-gel synthetic method had larger surface areas, were more defective and less thermally stable than those from CVD. Nanocomposites by the CVD method performed 39.2 % more efficient than those from sol-gel in light-harvesting experiments. The study shows that the nanocomposites synthesized were more effective than titania alone when the cheaper natural dye, Eosin B, was used. This highlights the great potential of typical nanomaterials in improving the performances of titania in DSSCs as well as lowering the cost of the ultimate devices.

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“…The unique properties including acid-base doping/ dedoping chemistry and redox behaviours make the electroactive polymers to be the potential candidates as chemical and fluorescent sensors [25][26][27]. Carbon nanotubes (CNTs) have attracted great attention in research since its discovery by Iijima [28] due to its unique physical and chemical properties, such as high mechanical strength, electrical, thermal stability and chemical stability [29]. CNTs are found mainly in two types: single walled carbon nanotubes and multi walled carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, CNTs has been used as a filler to incorporate within the polymer matrix. The CNTs/polymer composites exhibit improved mechanical property, good barrier property and excellent electrical conductivity [28][29][30][31][32][33]. Many reports in literature suggest that CNTs/ conducting polymer composites have great potential for use in vitamin C sensors [34,35].…”

Section: Introductionmentioning

confidence: 99%

Electroactive polyurea/CNT composite-based electrode for detection of vitamin C

Huang¹,

Yeh²,

Lai³

et al. 2016

Express Polym. Lett.

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Abstract. The electrocatalytic oxidation of vitamin C at carbon paste electrode (CPE) modified with amino-functionalized multiwalled carbon nanotube/electroactive polyurea (AF-MWCNT/EPU) composite was investigated. We have synthesized novel electroactive polyurea composites containing MWCNTs functionalized with 4-aminobenzoyl groups by an oxidative coupling polymerization. Ultraviolet-Visible spectra and cyclic voltammetry studies confirmed the occurrence of efficient interaction between AF-MWCNT and EPU graft. Moreover, the electrocatalytic activity of vitamin C oxidation by utilizing aniline containing composites was evaluated, showing that the intrinsic electroactivity of AF-MWCNT/EPU-CPE had great potential application for detection of vitamin C. The detection limit and sensitivity of this sensor was 1.2 µM and 35.3 !A·mM -1 , respectively.

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Characterization methods of carbon nanotubes: a review

Cited by 792 publications

References 143 publications

Graphene oxide-multiwalled carbon nanotubes composite as an anode for lithium ion batteries

Graphene oxide-multiwalled carbon nanotubes composite as an anode for lithium ion batteries

Multiwalled carbon nanotube-titania nanocomposites: Understanding nano-structural parameters and functionality in dye-sensitized solar cells

Electroactive polyurea/CNT composite-based electrode for detection of vitamin C

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