Catalytic growth of 0.4 nm single‐walled carbon nanotubes aligned inside porous zeolite crystals

Zhai, Jianpang; Tang, Zikang; Hu, Xijun; Zhang, Xixiang; Sheng, Ping

doi:10.1002/pssb.200669101

Cited by 8 publications

(3 citation statements)

References 11 publications

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“…Figure A represents the Raman spectrum of SWCNTs@AlPO‐5 film prior to etching, where the radial breathing mode (RBM) of SWCNTs@AlPO‐5 at 508 and 550 cm −1 is assigned to the semiconducting (4, 2) and (5, 0) SWCNTs . The relative ratio of the RBM to G ‐band, namely I RBM /I G values range between 0.1 and 4 for different carbon nanotube . In this work, the intensity of RBM bands at 534 cm −1 and the line width of the G ‐band in 1599 cm −1 was 0.19, indicating TrPA was well carbonized into SWCNT inside the AIPO‐5 channel.…”

Section: Figurementioning

confidence: 85%

Aligned High Density Semi‐Conductive Ultra‐Small Single‐Walled Carbon Nanotubes

et al. 2019

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Zeolite type material (AlPO‐5, AFI‐type) with rod‐like morphology and mono‐dimensional channel system running along the long crystal axis was vertically grown on a stainless‐steel plate. The organic template used in the synthesis was carbonized to generate single‐walled carbon nanotubes (SWCNTs). Thus, SWCNTs with a diameter of 0.4 nm, perfectly aligned and vertically oriented to the support surface with a density of 2.6 × 105 SWCNTs μm−2, were obtained. The free end of AlPO‐5 crystal was chemically etched in order to create contact surface and measure the conductivity of SWCNT@AlPO‐5 film which was found to be 4.16 × 10−1 Ω−1 cm−1. This approach of aligned SWCNTs can be applied to different types of substrates, thus opening the road to practical uses of SWCNTs.

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Section: Figurementioning

confidence: 85%

Aligned High Density Semi‐Conductive Ultra‐Small Single‐Walled Carbon Nanotubes

et al. 2019

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“…The carbonization temperature of TPA molecules inside the channels of Co-AFI crystals is notably decreased from that required in the pure material, demonstrating the catalytic role of the Co atoms, and their presence assists the formation of 0.4 nm SWNTs in the channels, which is conferred by a significant decrease in the formation energy for these nanotubes. 156 HY was used as the template material for the preparation of an ordered microporous carbon containing an amorphous carbon core and a graphitic carbon shell. The electrochemical properties of Pt supported on the carbon samples were examined and compared with a commercial catalyst.…”

Section: Porous Carbons and Zeolitesmentioning

confidence: 99%

Zeolites: physical aspects and environmental applications

Rhodes¹

2007

Annu. Rep. Prog. Chem., Sect. C: Phys. Chem.

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Research into zeolites continues apace, both in a search to elucidate their fundamental properties with the view to synthesising specifically-tailored materials for particular applications, and in finding new applications from the considerable existing knowledge about these important and remarkable materials, especially in relation to providing cleaner (''green'') processes with less impact on the environment, and in environmental remediation strategies. Advances in theoretical methods are likely to play an increased role in predicting the features and synthetic viability of modified and novel zeolite structures. As pressure mounts on the World's finite and dwindling supplies of hydrocarbons-obtained mainly from crude oil (and increasingly from coal and natural gas)-developments in the use of zeolites as catalysts to render known hydrocarbon cracking and oxidation chemistry more efficient, and the discovery of new catalytic processes, involving zeolites, both for the procurement and modification of hydrocarbons are to be expected.

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“…In our previous works, we reported 0.4 nm SWNTs accommodated in the nanochannels of AlPO 4 -5 zeolite single crystals [9,[18][19][20][21][22]. There are a few different types of zeolite crystals with different specific porous structures.…”

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confidence: 99%

Resonant Raman scattering of smallest single-walled carbon nanotubes

Tang

Zhai

Feng

et al. 2008

Carbon Nanotubes and Associated Devices

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We report optical properties of the smallest single-walled carbon nanotubes (SWNTs) with a diameter of only 3 Å . These ultrasmall SWNTs are fabricated in the elliptical nanochannels of an AlPO-11 (AEL) single crystal. Polarized and resonant Raman scattering unambiguously revealed that these 0.3 nm SWNTs are of (2,2) armchair symmetry. Interestingly, the (2,2) armchair tube has two metastable ground states corresponding to two slightly different lattice constants in the axial direction: one state is metallic and the other is semiconducting.

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Catalytic growth of 0.4 nm single‐walled carbon nanotubes aligned inside porous zeolite crystals

Cited by 8 publications

References 11 publications

Aligned High Density Semi‐Conductive Ultra‐Small Single‐Walled Carbon Nanotubes

Aligned High Density Semi‐Conductive Ultra‐Small Single‐Walled Carbon Nanotubes

Zeolites: physical aspects and environmental applications

Resonant Raman scattering of smallest single-walled carbon nanotubes

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