Purification of boron nitride nanotubes

Chen, Hua; Chen, Ying; Yu, Jun; Williams, James S.

doi:10.1016/j.cplett.2006.05.058

Cited by 56 publications

(57 citation statements)

References 13 publications

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“…Alternatively, heating boron in a nitrogen atmosphere generates BN, which can also be oxidized in air, forming B 2 O 3 . 30 Lastly, the surfactant purification approach utilizes surface-active agents, or surfactants, to influence the interfacial tension of the various species in the BNNT sample, enabling the removal of impurities. A similar approach has already been successfully utilized for CNTs.…”

Section: Purification Methodsmentioning

confidence: 99%

Boron nitride nanotube: synthesis and applications

et al. 2014

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Scientists have predicted that carbon's immediate neighbors on the periodic chart, boron and nitrogen, may also form perfect nanotubes, since the advent of carbon nanotubes (CNTs) in 1991. First proposed then synthesized by researchers at UC Berkeley in the mid 1990's, the boron nitride nanotube (BNNT) has proven very difficult to make until now. Herein we provide an update on a catalyst-free method for synthesizing highly crystalline, small diameter BNNTs with a high aspect ratio using a high power laser under a high pressure and high temperature environment first discovered jointly by NASA/NIA/JSA. Progress in purification methods, dispersion studies, BNNT mat and composite formation, and modeling and diagnostics will also be presented. The white BNNTs offer extraordinary properties including neutron radiation shielding, piezoelectricity, thermal oxidative stability (> 800˚C in air), mechanical strength, and toughness. The characteristics of the novel BNNTs and BNNT polymer composites and their potential applications are discussed.

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Section: Purification Methodsmentioning

confidence: 99%

Boron nitride nanotube: synthesis and applications

et al. 2014

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“…Pure Ar gas (30 slpm) was injected into the central region of the torch for stable plasma generation, and a ternary gas mixture of Ar (45 slpm), N 2 (55 slpm), and H 2 (20 slpm) was introduced along the ceramic tube wall, offering further plasma stabilization and chemical reactions. The produced raw BNNT materials contained amorphous boron and h-BN flake impurities and were purified through a scalable, nondestructive postprocessing protocol involving a combination of thermal treatments similar to the one reported by Chen et al 47 and solvent washing.…”

Section: Methodsmentioning

confidence: 99%

Covalent Functionalization of Boron Nitride Nanotubes via Reduction Chemistry

et al. 2015

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Covalent functionalization of boron nitride nanotubes via reduction chemistry Shin, Homin; Guan, Jingwen; Zgierski, Marek Z.; Kim, Keun S.; Kingston, Christopher T.; Simard, Benoit http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21277400&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21277400&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions?Contact the NRC Publications Archive team at PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1021/acsnano.5b06523 ACS Nano, 9, 12, pp. 12573-12582, 2015-11-18 B oron nitride nanotubes (BNNTs) consist of seamless cylinders of alternating boron and nitrogen atoms in a hexagonal BN bonding network. 1,2 Since their first synthesis in 1995, 1 BNNTs have been considered as revolutionary materials due to their unique properties, which are as compelling as those of carbon nanotubes (CNTs). Despite their structural similarity to CNTs, BNNTs also exhibit a range of physical and chemical properties distinct from CNTs, which are mainly attributed to the partial ionic bonding character of BN. For example, the mixed ionic and covalent bonding nature of BNNTs results in their wide band gaps, around 6.0 eV independent of diameter and chirality. Figure 1 illustrates the calculated valence electron density distribution of a (6,6) CNT and BNNT. The valence charges of a CNT are equally distributed around C atoms, indicating a strong covalent CÀC bond network as well as the delocalized electrons, while the bonding electrons of BNNT are more concentrated around N atoms with an asymmetric charge distribu...

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“…Considering these ambiguous behavior, both as prepared and purified samples were investigated in this work. So, to purify BN nanotubes it was chosen the chemically modified techniques described in the literature [24]. The purification was based on washing the sample with HCl solution (3 M) at 90˚C for 10 minutes, and then the sample was collected by filtration and dried at 40˚C.…”

Section: Synthesismentioning

confidence: 99%

A Novel Synthesis Route to Produce Boron Nitride Nanotubes for Bioapplications

Ferreira¹,

Silva²,

Santos³

et al. 2011

JBNB

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Nanostructures of boron nitride have attracted a great deal of interest due to their potential applications that comprise a broad range of topics, including biomedical technology, since it presents good chemical stability and suggests good biological inertia. This paper reports a facile and effective synthesis based on CVD process with new conditions to produce boron nitride nanotubes in higher amount using boron powder, ammonium nitrate and hematite as catalysts in tubular furnace, without using extreme conditions. The characterization of the material was carried out by Fourier transformed infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). From the results, it was possible to verify the production of a hexagonal BN nanotube filled with Fe nanoparticles. It was possible to understand the reactions involved in synthesis process, and also confirm the formation of hexagonal boron nitride nanotubes with iron nanoparticles as catalysts. Depending on the final use, samples need to be purified to analyze their unique properties in some bioapplications. In the other hand, sometimes BNNTs containing Fe nanoparticles have potential for use in therapeutic drug, gene and radionuclide delivery, and radio frequency methods for the catabolism of tumors via hyperthermia. In this sense, some application-related studies on BNNTs such as biocompatibility tests have also been investigated in both pure and BN nanotube filled with Fe

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Purification of boron nitride nanotubes

Cited by 56 publications

References 13 publications

Boron nitride nanotube: synthesis and applications

Boron nitride nanotube: synthesis and applications

Covalent Functionalization of Boron Nitride Nanotubes via Reduction Chemistry

A Novel Synthesis Route to Produce Boron Nitride Nanotubes for Bioapplications

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