Nanoporous alumina support covered by imidazole moiety-based ionic liquids: optical characterization and application
Fecha
2022Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Identificador del proyecto
AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2021-122613OB-I00
Impacto
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10.3390/nano12234131
Resumen
This work analyzes chemical surface and optical characteristics of a commercial nanoporous
alumina structure (NPAS) as a result of surface coverage by different imidazolium-based ionic liquids
(1-butyl-3-metylimidazolium hexafluorophosphate, 3-methyl-1-octylimidazolium hexafluorophosphate, or 1-ethyl-3-methylimidazolium tetrafluoroborate). Optical characteristics of the IL/NPAS
samples were de ...
[++]
This work analyzes chemical surface and optical characteristics of a commercial nanoporous
alumina structure (NPAS) as a result of surface coverage by different imidazolium-based ionic liquids
(1-butyl-3-metylimidazolium hexafluorophosphate, 3-methyl-1-octylimidazolium hexafluorophosphate, or 1-ethyl-3-methylimidazolium tetrafluoroborate). Optical characteristics of the IL/NPAS
samples were determined by photoluminescence (at different excitation wavelengths (from 300 nm
to 400 nm), ellipsometry spectroscopy, and light transmittance/reflectance measurements for a range
of wavelengths that provide information on modifications related to both visible and near-infrared
regions. Chemical surface characterization of the three IL/NPAS samples was performed by X-ray
photoelectron spectroscopy (XPS), which indicates almost total support coverage by the ILs. The
IL/NPAS analyzed samples exhibit different photoluminescence behavior, high transparency (<85%),
and a reflection maximum at wavelength ~380 nm, with slight differences depending on the IL, while
the refractive index values are rather similar to those shown by the ILs. Moreover, the illuminated
I–V curves (under standard conditions) of the IL/NPAS samples were also measured for determining
the efficiency energy conversion to estimate their possible application as solar cells. On the other
hand, a computational quantum mechanical modeling method (DFT) was used to establish the most
stable bond between the ILs and the NPAS support. [--]
Materias
Nanoporous alumina,
Ionic liquids,
Optical properties,
Solar cell
Editor
MDPI
Publicado en
Nanomaterials 2022, 12, 4131
Departamento
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute for Advanced Materials and Mathematics - INAMAT2
Versión del editor
Entidades Financiadoras
M.A. thanks the SpanishMinistry of Science and Innovation (MCIN/AEI/10.13039/
501100011033) through project PID2021-122613OB-I00.