Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/164134
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Electron trap states and photopotential of nanocrystalline titanium dioxide electrodes filled with single-walled carbon nanotubes |
Autor: | Ansón Casaos, Alejandro CSIC ORCID ; Hernández-Ferrer, Javier CSIC ORCID; Rubio-Muñoz, Cristina CSIC; Santidrián, Ana CSIC ORCID; Martínez Fernández de Landa, María Teresa CSIC ORCID ; Benito, Ana M. CSIC ORCID ; Maser, Wolfgang K. CSIC ORCID | Palabras clave: | Nanotubes Nanoparticles Films Semiconductors Voltammetry |
Fecha de publicación: | 13-sep-2017 | Editor: | Wiley-VCH | Citación: | ChemElectroChem 4(9): 2300-2307 (2017) | Resumen: | Hybrid film electrodes were made of nanocrystalline titanium dioxide (TiO2) and various percentages of single‐walled carbon nanotube (SWCNT) fillers up to 5.5 wt%. A complete photoelectrochemical study was performed in both alkaline and acidic conditions by using cyclic voltammetry, potentiostatic photocurrent measurements, and open‐circuit‐potential measurements under UV/Vis irradiation. Dark voltammograms show a transition from a capacitive to a resistive behavior in the TiO2 accumulation region upon increasing SWCNT percentages. In addition, the energy levels of deep electron traps change inside the TiO2 bandgap. The new peak positions correspond to the reduction potentials of SWCNTs, and their associated charge capacities increase with the SWCNT percentage. The modifications observed in dark experiments directly impact on the shape profile of cyclic voltammograms under irradiation. As a consequence, reduction potentials of SWCNTs appear near the cathodic peaks of certain water oxidation intermediates, and may be interacting with them. On the other hand, open‐circuit photopotentials reach maximum values for small SWCNTs percentages around 0.02 wt%. An increase in potentiodynamic and potentiostatic photocurrents is observed for the electrode containing 0.02 wt% SWCNTs, compared to reference TiO2 in acidic conditions. | Versión del editor: | https://doi.org/10.1002/celc.201700321 | URI: | http://hdl.handle.net/10261/164134 | DOI: | 10.1002/celc.201700321 | ISSN: | 2196-0216 | Referencias: | Ansón Casaos, Alejandro ; Hernández-Ferrer, Javier; Vallan, Lorenzo; Xie, Haibing ; Lira-Cantú, Mónica ; Benito, Ana M. ; Maser, Wolfgang K. Functionalized carbon dots on TiO2 for perovskite photovoltaics and stable photoanodes for water splitting. http://dx.doi.org/10.1016/j.ijhydene.2020.03.077. http://hdl.handle.net/10261/207374 |
Aparece en las colecciones: | (ICB) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
2017 Postprint ChemElectroChem.pdf | Artículo principal | 754,97 kB | Adobe PDF | Visualizar/Abrir |
celc201700321-sup-0001-misc_information.pdf | Información suplementaria | 740,32 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
8
checked on 13-abr-2024
WEB OF SCIENCETM
Citations
10
checked on 15-feb-2024
Page view(s)
355
checked on 17-abr-2024
Download(s)
545
checked on 17-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.