Production and Characterization of Boron-Doped Single Wall Carbon Nanotubes

Monteiro, F. H.; Larrudé, Dunieskys G.; Costa, M.E.H. Maia da; Terrazos, L. A.; Capaz, Rodrigo B.; Freire, F.L.

doi:10.1021/jp209494z

Cited by 34 publications

(35 citation statements)

References 32 publications

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“…Modification of CNTs has thus led to the creation of new functional and construction materials. 11 Doping of the carbonaceous materials with non-carbon atoms, such as nitrogen, [12][13][14][15][16][17][18][19] boron, [20][21][22][23][24] sulphur, [25][26][27][28][29] oxygen [30][31][32][33][34][35][36] and halogens 11,[37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] has been explored over the past two decades. Modification of the carbon surface and electronic properties has also been explored but the effect of chlorine (Cl) on the morphology of carbon nanomaterials is not well established.…”

Section: Introductionmentioning

confidence: 99%

The synthesis of carbon nanomaterials using chlorinated hydrocarbons over a Fe-Co/CaCO3 catalyst

Maboya¹,

Coville²,

Mhlanga³

2016

S.Afr.j.chem.

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The effect of chlorine on the morphology of carbon nanotubes (CNTs) prepared from a Fe-Co/CaCO 3 catalyst was investigated using chlorobenzene (CB), dichlorobenzene (DCB), trichlorobenzene (TCB), dichloroethane (DCE), trichloroethane (TCE) and tetrachloroethane (TTCE) as chlorine sources using a catalytic chemical vapour deposition (CCVD) method. Toluene was used as a chlorine-free carbon source for comparison. Multi-walled carbon nanotubes (MWCNTs) were successfully synthesized. The physicochemical properties of the CNTs were studied using transmission electron microscopy (TEM), Raman spectroscopy, thermal gravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (PXRD) spectroscopy, and X-ray photoelectron spectroscopy (XPS) techniques. The inner and outer diameters of the MWCNTs increased with an increase in the number of chlorine atoms contained in the reactant. Chlorine incorporation into the MWCNTs was observed by EDS analysis for all reactants. Formation of 'bamboo-like' structures for the MWCNTs generated from TCE and TTCE was also observed, facilitated by the presence of the high percentage of chlorine in these reactants. Numerous MWCNTs revealed the presence of small carbon nanostructures that grew on top of the dominant CNTs, suggesting an unexpected secondary carbon growth mechanism.

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Section: Introductionmentioning

confidence: 99%

The synthesis of carbon nanomaterials using chlorinated hydrocarbons over a Fe-Co/CaCO3 catalyst

Maboya¹,

Coville²,

Mhlanga³

2016

S.Afr.j.chem.

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“…The peak at 187.5 eV is associated with B 4 C [30], while the two peaks corresponding to higher binding energies are assigned to BCO 2 at 191.5 eV [30], respectively, which can be formed when boron atoms adopt a low-coordination substitutional site close to the graphene edges [19,20]. The peak at 190.7 eV is assigned to BC 2 O compound in the sample grown at 200 mTorr [29]. In Table 1, the amounts of boron present in the samples grown using Cu substrate exposed at 25, 75, and 200 mTorr pressure of triisopropyl borate vapor at 1000 ∘ C for 5 minutes are reported.…”

Section: Resultsmentioning

confidence: 97%

“…Few theoretical studies have been reported in the literature. Based on DFT calculations, a value between 188.5 and 190 eV for the binding energy is attributed in the XPS B 1s core-level spectra revealing the boron incorporation into substitutional sites [29]. High-energy resolution XPS measurements on boron-doped graphene have associated the peak with a binding energy of 189.6 eV to substitutional doping of graphene by boron atoms [20].…”

Section: Resultsmentioning

confidence: 99%

Incorporation of Boron Atoms on Graphene Grown by Chemical Vapor Deposition Using Triisopropyl Borate as a Single Precursor

Romani

Larrudé

Costa

et al. 2017

Journal of Nanomaterials

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We synthesized single-layer graphene from a liquid precursor (triisopropyl borate) using a chemical vapor deposition. Optical microscopy, scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy measurements were used for the characterization of the samples. We investigated the effects of the processing temperature and time, as well as the vapor pressure of the precursor. The B 1s core-level XPS spectra revealed the presence of boron atoms incorporated into substitutional sites. This result, corroborated by the observed upshift of both G and 2D bands in the Raman spectra, suggests the p-doping of single-layer graphene for the samples prepared at 1000 ∘ C and pressures in the range of 75 to 25 mTorr of the precursor vapor. Our results show that, in optimum conditions for single-layer graphene growth, that is, 1000 ∘ C and 75 mTorr for 5 minutes, we obtained samples presenting the coexistence of pristine graphene with regions of boron-doped graphene.

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“…However, many boron carbon materials and boron doped carbon nanotubes have been successfully synthesized and reported. 44,[48][49][50] So that the nanotubes in this study could in principle be synthesized, especially for B 2 CNT(0, n) based on their low strain energies.…”

Section: Resultsmentioning

confidence: 99%

CO2 capture and gas separation on boron carbon nanotubes

Sun

Wang

et al. 2013

Chemical Physics Letters

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. (2013). CO2 capture and gas separation on boron carbon nanotubes. Chemical Physics Letters, 575 ( June), 59-66. CO2 capture and gas separation on boron carbon nanotubes AbstractConcern about the increasing atmospheric CO2 concentration and its impact on the environment has led to increasing attention directed toward finding advanced materials and technologies suited for efficient CO2 capture, storage and purification of clean-burning natural gas. In this letter, we have performed comprehensive theoretical investigation of CO2, N2, CH4 and H2 adsorption on B2CNTs. Our study shows that CO2 molecules can form strong interactions with B2CNTs with different charge states. However, N2, CH 4 and H2 can only form very weak interactions with B 2CNTs. Therefore, the study demonstrates B2CNTs could sever as promising materials for CO2 capture and gas separation. 2013 Elsevier B.V. All rights reserved.

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Production and Characterization of Boron-Doped Single Wall Carbon Nanotubes

Cited by 34 publications

References 32 publications

The synthesis of carbon nanomaterials using chlorinated hydrocarbons over a Fe-Co/CaCO3 catalyst

The synthesis of carbon nanomaterials using chlorinated hydrocarbons over a Fe-Co/CaCO3 catalyst

Incorporation of Boron Atoms on Graphene Grown by Chemical Vapor Deposition Using Triisopropyl Borate as a Single Precursor

CO2 capture and gas separation on boron carbon nanotubes

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