@Article{SilvaZaSaMeViCoFa:2014:ElBeVe,
author = "Silva, Tiago Almeida and Zanin, Hudson and Saito, Eduardo and
Medeiros, Roberta Antigo and Vicentini, Fernando Campanh{\~a} and
Corat, Evaldo Jos{\'e} and Fatibello-Filho, Orlando",
affiliation = "{Federal University of Sao Carlos} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and Center of Engineering and Exact Sciences,
State University of West Paran{\'a}, Rua da Faculdade 2550,
Toleto, CEP: 85903000,PR, Brazil and {Federal University of Sao
Carlos} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Federal University of Sao Carlos}",
title = "Electrochemical behaviour of vertically aligned carbon nanotubes
and graphene oxide nanocomposite as electrode material",
journal = "Electrochimica Acta",
year = "2014",
volume = "119",
pages = "114--119",
keywords = "Brunauer-emmett-teller surface areas, Fast electron transfer,
Graphene oxides, Microwave chemical vapor deposition, Oxygen
plasma etching, Vertically aligned, Vertically aligned carbon
nanotube, X ray photoemission spectroscopy, Carbon nanotubes,
Chemical vapor deposition, Cyclic voltammetry, Electrocatalysis,
Electron transitions, Graphene, Nanocomposites, Oxygen,
Photoelectron spectroscopy, Plasma etching, Scanning electron
microscopy, Wetting, Surfaces.",
abstract = "Vertically aligned carbon nanotubes/graphene oxide nanocomposite
(VACNT-GO) has been prepared and applied as electrode material.
First, dense packets of VACNT were prepared in microwave chemical
vapor deposition reactor, and then functionalized by oxygen plasma
etching. We observed that oxygen plasma could exfoliate carbon
nanotubes tips and provide oxygen group attachment on its surface,
changing its wettability as well. This change in wettability of
the VACNT is crucial for its electrochemical application, since
as-grown VACNT is super-hydrophobic. After exfoliation and
functionalization, the electrochemical tests were performed using
potassium ferrocyanide. The cyclic voltammetry (CV) and impedance
spectroscopy revealed fast electron transfer kinetics on this new
material. The CV peak potential separation was 59 mV, suggesting
ideal reversibility at the electrode. The Nyquist and Bode plots
were well-fitted as modified Randles equivalent electrical
circuits with non-charge transfer impedance. This new highly
porous nanostructures have been intensively characterized by
scanning electron microscopy, Brunauer-Emmett-Teller surface area,
surface wettability, Raman and X-ray photoemission spectroscopy.
Our results suggest this new material has a relevant potential for
future applications in electrocatalysis and (bio)sensors.",
doi = "10.1016/j.electacta.2013.12.024",
url = "http://dx.doi.org/10.1016/j.electacta.2013.12.024",
issn = "0013-4686",
label = "scopus 2014-05 SilvaZaSaMeViCoFa:2014:ElBeVe",
language = "en",
targetfile = "1-s2.0-S001346861302464X-main-1.pdf",
url = "http://dx.doi.org/10.1016/j.electacta.2013.12.024",
urlaccessdate = "19 abr. 2024"
}