Boron Nitride Nanocage Clusters, Nanotubes, Nanohorns, Nanoparticles, and Nanocapsules

Oku, Takeo; Narita, Ichihito; Koi, Naruhiro; Nishiwaki, Atsushi; Suganuma, Katsuaki; Inoue, Masahiro; Hiraga, Kenji; Matsuda, T.; Hirabayashi, Makoto; Tokoro, Hisato; Fujii, Satoshi; Gonda, Makoto; Nishijima, Masahiko; Hirai, Toshio; Belosludov, Rodion V.

doi:10.1007/978-1-4419-0086-9_6

Cited by 24 publications

(14 citation statements)

References 144 publications

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“…A HREM image of BN nanocage produced from LaB6/B powder is shown in Figure 2b, which indicates square-like shape, and four-membered rings of BN exist at the corner of the cage. The BN nanocage has a network-like structure, whose atomic arrangement is basically consistent with the B36N36 cluster structure [8]. BN nanocapsules with Pd nanoparticles were also produced as shown in Figure 2c, and Pd nanoparticles were covered by a few BN layers.…”

Section: Experimental Procedures and Calculation Methodssupporting

confidence: 58%

“…Many studies on H2 gas storage in carbon (C) nanomaterials have been reported [2][3][4][5][6][7]. Boron nitride (BN) nanomaterials are also expected in prospective application because they provide good stability at high temperatures with high electronic insulation in air [8]. Hydrogen storage in BN nanomaterials has also been studied recently [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Influence of endohedral element on H2 gas storage ability of BN fullerene-like materials was also investigated by theoretical calculations. Energy of chemisorption was investigated for cage clusters as a cap structure of nanotubes, and B24N24 clusters, reported by mass spectrometry [8,19], were selected for the storage material. Li, K and Na elements were also selected for the doping atoms because these elements are of high electropositive character.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Storage in Boron Nitride and Carbon Nanomaterials

Oku

2014

Energies

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Boron nitride (BN) nanomaterials were synthesized from LaB6 and Pd/boron powder, and the hydrogen storage was investigated by differential thermogravimetric analysis, which showed possibility of hydrogen storage of 1-3 wt%. The hydrogen gas storage in BN and carbon (C) clusters was also investigated by molecular orbital calculations, which indicated possible hydrogen storage of 6.5 and 4.9 wt%, respectively. Chemisorption calculation was also carried out for B24N24 cluster with changing endohedral elements in BN cluster to compare the bonding energy at nitrogen and boron, which showed that Li is a suitable element for hydrogenation to the BN cluster. The BN cluster materials would store H2 molecule easier than carbon fullerene materials, and its stability for high temperature would be good. Molecular dynamics calculations showed that a H2 molecule remains stable in a C60 cage at 298 K and 0.1 MPa, and that pressures over 5 MPa are needed to store H2 molecules in the C60 cage.

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Section: Experimental Procedures and Calculation Methodssupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrogen Storage in Boron Nitride and Carbon Nanomaterials

Oku

2014

Energies

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“…Boron nitride acts as p-type semiconductor, and diamond has a similar crystal structure as boron nitride. Combination of the present solar cells and nanomaterials such as diamond or boron nitride with various direct band gaps might be effective for increase of efficiencies [37]. The performance of the present solar cells would be dependent on the nanoscale structures of the organic-inorganic materials, and control of the structure should be investigated further.…”

Section: Cuins 2 :C 60 Bulk Heterojunction Solar Cellsmentioning

confidence: 98%

Fabrication and Characterization of Fullerene-Based Bulk Heterojunction Solar Cells with Porphyrin, CuInS2, Diamond and Exciton-Diffusion Blocking Layer

Oku¹,

Nagata²,

Noma³

et al. 2010

Energies

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Abstract:Fullerene-based bulk heterojunction solar cells were fabricated, and the electronic and optical properties were investigated. C 60 were used as n-type semiconductors, and porphyrin, CuInS 2 and diamond were used as p-type semiconductors. An effect of exciton-diffusion blocking layer of perylene derivative on the solar cells between active layer and metal layer was also investigated. Optimized structures with the exciton-diffusion blocking layer improved conversion efficiencies. Electronic structures of the molecules were investigated by molecular orbital calculation, and energy levels of the solar cells were discussed. Nanostructures of the solar cells were investigated by transmission electron microscopy, electron diffraction and X-ray diffraction, which indicated formation of mixed nanocrystals.

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“…1. The differences between BN and carbon nanomaterials (Oku et al 2009) are summarized as shown in Table 1.…”

Section: Introductionmentioning

confidence: 99%