TiO2 nanowires doped with hæmatite nanoparticles for enhanced photocatalytic degradation of methyl orange.

Hæmatite nanoparticles with a truncated dodecahedron crystal shape were synthesized by hydrothermal method at 180 °C and self-generated pressure. FeCl3.7H2O, acetic acid and NaOH were employed as precursors. This crystal shape has an improved performance in the photo-Fenton reaction due to terminal...

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Autores principales: Vinuesa, Ariel José, Irusta Alderete, Silvia, Saux, Clara
Formato: Documento de conferencia publisherVersion
Lenguaje:Inglés
Publicado: 2022
Materias:
TiO2 nanowires
Photodegradation
Methyl orange
Acceso en línea:http://hdl.handle.net/20.500.12272/6425
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-6425
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic TiO2 nanowires
Photodegradation
Methyl orange
spellingShingle TiO2 nanowires
Photodegradation
Methyl orange
Vinuesa, Ariel José
Irusta Alderete, Silvia
Saux, Clara
TiO2 nanowires doped with hæmatite nanoparticles for enhanced photocatalytic degradation of methyl orange.
topic_facet TiO2 nanowires
Photodegradation
Methyl orange
description Hæmatite nanoparticles with a truncated dodecahedron crystal shape were synthesized by hydrothermal method at 180 °C and self-generated pressure. FeCl3.7H2O, acetic acid and NaOH were employed as precursors. This crystal shape has an improved performance in the photo-Fenton reaction due to terminal Fe exposure. The nanoparticles were previously characterized and further added to a sol-gel mixture to prepare the TiO2 nanowires with a coaxial setup for the electrospinning. The composite nanowires were characterized through HR-TEM, UV-Vis DRS, TGA and XRD and tested in the photodegradation of methyl orange with the addition of H2O2. Rutile and anatase and hematite were identified in the diffraction patterns. By TEM it was possible to confirm a good nanoparticle dispersion along the nanowires. The nanowires showed an improved absorption in the visible spectrum compared to that of pure TiO2. The discoloration yield was 85% after 2 h of reaction. This result is comparable to the one obtained with a suspension of hæmatite nanoparticles alone. It should be noted that the colourant discoloration under UV activated H2O2 reached only 40 %. In conclusion, these composite nanowires have two attractive features with regard to water treatment technologies, namely the advantage of easy recovery and the possibility to carry out the reaction without H2O2, due to the enhanced semiconductor capacity of TiO2.
format Documento de conferencia
publisherVersion
author Vinuesa, Ariel José
Irusta Alderete, Silvia
Saux, Clara
author_facet Vinuesa, Ariel José
Irusta Alderete, Silvia
Saux, Clara
author_sort Vinuesa, Ariel José
title TiO2 nanowires doped with hæmatite nanoparticles for enhanced photocatalytic degradation of methyl orange.
title_short TiO2 nanowires doped with hæmatite nanoparticles for enhanced photocatalytic degradation of methyl orange.
title_full TiO2 nanowires doped with hæmatite nanoparticles for enhanced photocatalytic degradation of methyl orange.
title_fullStr TiO2 nanowires doped with hæmatite nanoparticles for enhanced photocatalytic degradation of methyl orange.
title_full_unstemmed TiO2 nanowires doped with hæmatite nanoparticles for enhanced photocatalytic degradation of methyl orange.
title_sort tio2 nanowires doped with hæmatite nanoparticles for enhanced photocatalytic degradation of methyl orange.
publishDate 2022
url http://hdl.handle.net/20.500.12272/6425
work_keys_str_mv AT vinuesaarieljose tio2nanowiresdopedwithhæmatitenanoparticlesforenhancedphotocatalyticdegradationofmethylorange
AT irustaalderetesilvia tio2nanowiresdopedwithhæmatitenanoparticlesforenhancedphotocatalyticdegradationofmethylorange
AT sauxclara tio2nanowiresdopedwithhæmatitenanoparticlesforenhancedphotocatalyticdegradationofmethylorange
bdutipo_str Repositorios
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