Boron nitride colloidal solutions, ultralight aerogels and freestanding membranes through one-step exfoliation and functionalization

Lei, Weiwei; Mochalin, Vadym; Liu, Dan; Qin, Si; Gogotsi, Yury; Chen, Ying

doi:10.1038/ncomms9849

Cited by 712 publications

(661 citation statements)

References 55 publications

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“…It is known that ball-milling of h-BN with a lot of different materials can generate functionalized h-BN nanosheets [39]. For instance, a one-step method for the preparation and functionalization of few-layer BN was developed based on urea-assisted solid exfoliation of commercially available h-BN [40]. Such kind of functionalized BN nanosheets are attractive for a lot of applications such as polymer matrix composites [41], ion conductors [42], and hydrogen storage [43].…”

Section: Discussionmentioning

confidence: 99%

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

et al. 2017

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Hexagonal boron nitride (h-BN) is known as an effective additive to improve the hydrogen de/absorption properties of hydrogen storage materials consisting of light elements. Herein, we report the unique hydrogen desorption properties of LiAlH 4 /h-BN composites, which were prepared by ball-milling. The desorption profiles of the composite indicated the decrease of melting temperature of LiAlH 4 , the delay of desorption kinetics in the first step, and the enhancement of the kinetics in the second step, compared with milled LiAlH 4 . Li 3 AlH 6 was also formed in the composite after desorption in the first step, suggesting h-BN would have a catalytic effect on the desorption kinetics of Li 3 AlH 6 . Finally, the role of h-BN on the desorption process of LiAlH 4 was discussed by comparison with the desorption properties of LiAlH 4 /X (X = graphite, LiCl and LiI) composites, suggesting the enhancement of Li ion mobility in the LiAlH 4 /h-BN composite.

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Section: Discussionmentioning

confidence: 99%

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

et al. 2017

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“…The peak at 190.3 eV was found in both the BNNTs and NH 2 Ph-BNNTs, which was assigned to B-N in BNNTs [24,27]. There was another peak obtained from the peak-fitting; however, for this peak BNNTs and NH 2 Ph-BNNTs showed slight different binding energy values.…”

Section: Xps Analysismentioning

confidence: 91%

“…The N1s of BNNTs perfectly presented a single peak with binding energy at 397.9 eV, corresponding to B-N-B [26,27]. Obviously, the N1s peak of NH 2 Ph-BNNTs was not a single peak.…”

Section: Xps Analysismentioning

confidence: 93%

Covalent Surface Functionalization of Boron Nitride Nanotubes Fabricated with Diazonium Salt

Liu

et al. 2018

Journal of Nanomaterials

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The chemical inertness and poor wetting properties of boron nitride nanotubes (BNNTs) hindered their applications. In this work, BNNTs have been functionalized with aniline groups by reacting with diazonium salt and the graft content of aniline component was calculated as high as 71.4 wt.%. The chemical structure, composition, and morphology of functionalized BNNTs were carefully characterized to illustrate the modification. The anilinocarbocation generated by decomposition of diazonium salt reacted not only with NH 2 sites, but also with B-OH sites on the surface of BNNTs. Meanwhile, the reaction applied a hot strong acid environment, which would help to open parts of B-N bonds to produce more reactive sites and enrich the functional groups grafted on the surface of BNNTs. Consequently, the functionalized BNNTs exhibited significantly improved dispersion stability in chloroform compared with pristine BNNTs. Amino surface functionalization of BNNTs offered more possibilities for surface chemical design of boron nitride and its practical application.

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“…A further reduction in the temperature required for BN aerogel synthesis was reported by Lei et al 119 Lei et al succeeded in producing aqueous colloidal suspensions of BN which form hydrogels at room temperature. To achieve this, the BN powder is ball milled with urea to both exfoliate and functionalize the sheets with amine groups, which renders the BN water dispersible.…”

Section: A Boron Nitride Aerogelsmentioning

confidence: 96%

Carbon aerogel evolution: Allotrope, graphene-inspired, and 3D-printed aerogels

et al. 2017

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Carbon aerogels (CAs) are a unique class of high surface area materials derived by sol-gel chemistry. Their high mass-specific surface area and electrical conductivity, environmental compatibility, and chemical inertness make them very promising materials for many applications, such as energy storage, catalysis, sorbents, and desalination. Since the first CAs were made via pyrolysis of resorcinol-formaldehyde (RF)-based organic aerogels in the late 1980s, the field has really grown. Recently, in addition to RF-derived amorphous CAs, several other carbon allotropes have been realized in aerogel form: carbon nanotubes (CNTs), graphene, graphite, and diamond. Furthermore, the popularity of graphene aerogels has inspired research into aerogels made of a host of graphene analog materials (e.g., boron nitride, transition metal dichalcogenides, etc.), with potential for an even wider array of applications. Finally, the development of threedimensional-printed aerogels provides the potential for CAs to have an even broader impact on energy-related technologies. Here, we will present recent work covering the novel synthesis of

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Boron nitride colloidal solutions, ultralight aerogels and freestanding membranes through one-step exfoliation and functionalization

Cited by 712 publications

References 55 publications

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

Covalent Surface Functionalization of Boron Nitride Nanotubes Fabricated with Diazonium Salt

Carbon aerogel evolution: Allotrope, graphene-inspired, and 3D-printed aerogels

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