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Materials 2017, 10(10), 1216; doi:10.3390/ma10101216

Cl-Assisted Large Scale Synthesis of Cm-Scale Buckypapers of Fe3C-Filled Carbon Nanotubes with Pseudo-Capacitor Properties: The Key Role of SBA-16 Catalyst Support as Synthesis Promoter

College of Physical Science and Technology, Sichuan University, Chengdu 610064, China
Analytical & Testing Center, Sichuan University, Chengdu 610064, China
School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430072, China
School of Physical Sciences, University of Kent, Canterbury CT2 7NZ, UK
Authors to whom correspondence should be addressed.
Received: 24 July 2017 / Revised: 26 September 2017 / Accepted: 20 October 2017 / Published: 23 October 2017
(This article belongs to the Section Porous Materials)
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We show a novel chemical vapour deposition (CVD) approach, in which the large-scale fabrication of ferromagnetically-filled cm-scale buckypapers is achieved through the deposition of a mesoporous supported catalyst (SBA-16) on a silicon substrate. We demonstrate that SBA-16 has the crucial role of promoting the growth of carbon nanotubes (CNTs) on a horizontal plane with random orientation rather than in a vertical direction, therefore allowing a facile fabrication of cm-scale CNTs buckypapers free from the onion-crust by-product observed on the buckypaper-surface in previous reports. The morphology and composition of the obtained CNTs-buckypapers are analyzed in detail by scanning electron microscopy (SEM), Energy Dispersive X-ray (EDX), transmission electron microscopy (TEM), high resolution TEM (HRTEM), and thermogravimetric analysis (TGA), while structural analysis is performed by Rietveld Refinement of XRD data. The room temperature magnetic properties of the produced buckypapers are also investigated and reveal the presence of a high coercivity of 650 Oe. Additionally, the electrochemical performances of these buckypapers are demonstrated and reveal a behavior that is compatible with that of a pseudo-capacitor (resistive-capacitor) with better performances than those presented in other previously studied layered-buckypapers of Fe-filled CNTs, obtained by pyrolysis of dichlorobenzene-ferrocene mixtures. These measurements indicate that these materials show promise for applications in energy storage systems as flexible electrodes. View Full-Text
Keywords: carbon nanotubes; ferromagnetic Fe3C; SBA-16; buckypaper; capacitor carbon nanotubes; ferromagnetic Fe3C; SBA-16; buckypaper; capacitor

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Boi, F.S.; He, Y.; Wen, J.; Wang, S.; Yan, K.; Zhang, J.; Medranda, D.; Borowiec, J.; Corrias, A. Cl-Assisted Large Scale Synthesis of Cm-Scale Buckypapers of Fe3C-Filled Carbon Nanotubes with Pseudo-Capacitor Properties: The Key Role of SBA-16 Catalyst Support as Synthesis Promoter. Materials 2017, 10, 1216.

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