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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Thin-film nanocomposites of BDD/CNT deposited on carbon fiber

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Author(s):
Silva, Amanda Araujo ; Pinheiro, Romario Araujo ; Razzino, Claudia do Amaral ; Trava-Airoldi, Vladimir Jesus ; Corat, Evaldo Jose
Total Authors: 5
Document type: Journal article
Source: DIAMOND AND RELATED MATERIALS; v. 75, n. SI, p. 116-122, MAY 2017.
Web of Science Citations: 4
Abstract

The nanocomposites of porous boron-doped diamond deposited on carbon nanotubes (BDD/CNTs) present great surface area and high capacitance, making them a material of considerable interest for application in electro-chemistry. In this work, we present a new approach in which this nanocomposite is deposited on carbon fiber (CF) to increase the surface area and the capacitance comparing to the unsized CF electrode. We performed the dip-coating for catalyst deposition on CF surface. After, CNTs growth followed in a tubular reactor at 650 degrees C for 20 min, using camphor in a 200 g/L hexane solution as the carbon source. Electrostatic Self Assembly (ESA) seeding of nanodiamond (ND) went on by grafting polar groups onto CNTs surface by oxygen plasma functionalization. The seeding process was made with 4 nm diamond nanoparticles dispersed in KCI aqueous solution. The BDD films were deposited by Hot Filament Chemical Vapor Deposition (HFCVD) reactor. The authors studied the composites morphology, structure and electrochemical properties by Scanning Electron Microscopy with Field Emission Gun (FEG-SEM), Raman spectroscopy, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). This new material presented larger surface area and higher capacitance compared to CF without treatment, as presented in electrochemical analysis results. The SEM micrographs showed absence of metallic particles on CNTs structure, what promoted a better quality diamond growth. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 12/15857-1 - Scientific studies and innovation application on CVD diamond, DLC and carbon nanostructures obtained by chemical vapor deposition technique
Grantee:Vladimir Jesus Trava-Airoldi
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/02960-7 - Optimization study of large electrochemical active area of nanocomposites VACNT-GO and its application in capacitive deionization
Grantee:Amanda Araujo Silva
Support type: Scholarships in Brazil - Doctorate (Direct)