| TAZ-TFM-2019-275 |
Síntesis y caracterización de fibras de óxidos a través de electrospinning para aplicaciones en catálisis
Coba Daza, Jorge Sebastián
Irusta Alderete, Silvia (dir.)
Universidad de Zaragoza,
CIEN,
2019
Ingeniería Química y Tecnologías del Medio Ambiente department, Tecnologías del Medio Ambiente area
Máster en Materiales Nanoestructurados para Aplicaciones Nanotecnológicas (Nanostructured Materials for Nanotechnology Applications)
Abstract: Electrospinning is a versatile technique that uses an electrical charge to produce very fine
fibers from a polymeric solution. It has very high potential to be applied in different fields as
in energy storage, in medicine, in cosmetics and in catalysis. Electrospinning is cost effective,
reproducible and it can produce long and continuous nanofibers. Polymers such polyamides,
polyalcohol and PVP among others, can be easily electrospun. The use of inorganic
nanofibers obtained from template-based electrospun polymers is increasing because their
performance in different applications due to the high surface to volume ratio.
In this work three different nanofibers (Ce2O/NiO, CeO2/NiO/MgO and TiO2-doped-Fe2O3
NP) were synthesized trough electrospinning process followed by a calcination process. The
processing conditions such as voltage applied and feed rate in the electrospinning process
were studied to find the best conditions for uniform fibers production. The calcination
process was performed to completely oxidize the organic PVP present and promote the
growth of the oxide nanoparticles that form the nanofiber.
Characterization techniques such as scanning electron microscopy (SEM), energy dispersive
X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray diffraction
(XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA),
microwave plasma-atomic emission spectroscopy (MP-AES), temperature programmed
reduction (TPR), dynamic light scattering (DLS) and UV-vis spectroscopy were used to
study the morphology, chemical and crystal characteristics of the samples. This work
discusses the possibility to future use of the different synthesized nanofibers in the
applications in catalysis for the CO2 methanation reaction (CeO2/NiO and CeO2/NiO/MgO
nanofibers) and the water pollutants removal (TiO2-dop-Fe2O3 NP)
fibers from a polymeric solution. It has very high potential to be applied in different fields as
in energy storage, in medicine, in cosmetics and in catalysis. Electrospinning is cost effective,
reproducible and it can produce long and continuous nanofibers. Polymers such polyamides,
polyalcohol and PVP among others, can be easily electrospun. The use of inorganic
nanofibers obtained from template-based electrospun polymers is increasing because their
performance in different applications due to the high surface to volume ratio.
In this work three different nanofibers (Ce2O/NiO, CeO2/NiO/MgO and TiO2-doped-Fe2O3
NP) were synthesized trough electrospinning process followed by a calcination process. The
processing conditions such as voltage applied and feed rate in the electrospinning process
were studied to find the best conditions for uniform fibers production. The calcination
process was performed to completely oxidize the organic PVP present and promote the
growth of the oxide nanoparticles that form the nanofiber.
Characterization techniques such as scanning electron microscopy (SEM), energy dispersive
X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray diffraction
(XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA),
microwave plasma-atomic emission spectroscopy (MP-AES), temperature programmed
reduction (TPR), dynamic light scattering (DLS) and UV-vis spectroscopy were used to
study the morphology, chemical and crystal characteristics of the samples. This work
discusses the possibility to future use of the different synthesized nanofibers in the
applications in catalysis for the CO2 methanation reaction (CeO2/NiO and CeO2/NiO/MgO
nanofibers) and the water pollutants removal (TiO2-dop-Fe2O3 NP)
Tipo de Trabajo Académico: Trabajo Fin de Master
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