Autor(es)

Silva, Amanda Araujo ; Pinheiro, Romario Araujo ; Razzino, Claudia do Amaral ; Trava-Airoldi, Vladimir Jesus ; Corat, Evaldo Jose

• Tipo de documento: Artigo Científico
• Fonte: DIAMOND AND RELATED MATERIALS; v. 75, p. 7-pg., 2017-05-01.

Resumo

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)

• Processo FAPESP: 12/15857-1 - Estudos científicos e aplicações inovadoras em diamante-CVD, Diamond-Like Carbon (DLC) e carbono nanoestruturado, obtidos por deposição química na fase vapor
• Beneficiário: Vladimir Jesus Trava-Airoldi
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 11/17877-7 - Desenvolvimento de novos scaffolds poliméricos por eletrofiação com incorporação de nanotubos alinhados e nanohidroxiapatita para regeneração óssea
• Beneficiário: Anderson de Oliveira Lobo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 15/02960-7 - Estudo de otimização da grande área eletroquímica ativa de nanocompósitos VACNT-GO e sua aplicação em deionização capacitiva
• Beneficiário: Amanda Araujo Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto