@InProceedings{AmaralJúniorMaFeReBaMa:2015:PrChAc,
author = "Amaral J{\'u}nior, Miguel Angelo do and Matsushima, Jorge Tadao
and Ferreira, Neiden{\^e}i Gomes and Rezende, Mirabel Cerqueira
and Baldan, Maur{\'{\i}}cio Ribeiro and Marcuzzo, Jossano
Saldanha",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Federal de S{\~a}o
Paulo (UNIFESP)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Production and characterization of activated carbon fibers from
brazilian textile PAN",
year = "2015",
organization = "Materials Research Society: Fall Meeting",
abstract = "Carbon fibers (CF) are lightweight materials and are associated to
excellent mechanical properties, high thermal and electrical
conductivity and low thermal expansion coefficient. These
characteristics have been attracted attention of many research
groups in different science field and application [1-5]. One of
the most applications used for CF is the activating. The activated
carbon fibers (ACF) have an interesting adsorption capacity. The
adsorption capacity is due to the ACF have well-defined pore
structures which provide a high specific surface area in contrast
with CF. ACF is one of the most widely used adsorbent materials
around the world. Normally, ACF is used for the drinking and waste
water treatment and in many other applications where the removal
of generally dispersed contaminant molecules is desired [6]. The
goal of this work was to produce inexpensive activated carbon
fibers and characterization the fibers for future applications in
metallic substance removal from water. In this work, the carbon
fibers were produced from the carbonization of Brazilian textile
polyacrylonitrile fiber. Carbon fiber were produced from PAN fiber
oxidation in air (260°C) and carbonized in argon atmosphere at
900°C. The activation process was performed immediately after
carbonization by shifting the argon gas to CO2 and rising up the
temperature to 1000°C during 50 min. The morphologies of activated
and not activated carbon fiber were characterized by scanning
electron microscope (SEM). The morphological surface analyze
indicated the existence of pore on the surface of the ACF
increasing the surface roughness and wetting ability. X-ray
photoelectron spectroscopy (XPS) was used to measure presence of
oxygen content on the fibers. It was observed by XPS a high
intensity in the capture of the carbon electrons of the ACF this
shown a significant reduction of oxygen in the ACF. Raman
spectroscopy and X-ray diffractometer (XRD) were used to
structural characterization. By using the Raman spectroscopy was
possible to analyze fibers superficially while XRD analyzed more
internal structures. The Raman spectrums were fitted in four
Gaussian and one Lorentzian curve as reported in literature. The
Raman results showed that the ACF presented an increase on D peak,
which is linked to the disorganization of the graphitic structure.
According to the DRX the CF had higher crystallites that the ACF,
this decrease in crystallite was due to the surface tension during
the activation process. These results are in according to the SEM
and XPS results giving additional information about the influence
of the activating for adsorption property of the ACF.",
conference-location = "Boston, MA",
conference-year = "29 Nov. - 04 Dec.",
urlaccessdate = "15 jun. 2024"
}