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Influence of the Heating Rate on the Annealing Treatment of Iron Oxide Nanostructures Obtained by Electrochemical Anodization under Hydrodynamic Conditions

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Influence of the Heating Rate on the Annealing Treatment of Iron Oxide Nanostructures Obtained by Electrochemical Anodization under Hydrodynamic Conditions

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dc.contributor.author	Lucas Granados, Bianca
dc.contributor.author	Sánchez Tovar, Rita
dc.contributor.author	Fernández Domene, Ramón Manuel
dc.contributor.author	Garcia-Anton, Jose
dc.date.accessioned	2020-10-15T14:46:34Z
dc.date.available	2020-10-15T14:46:34Z
dc.date.issued	2017
dc.identifier.citation	Lucas Granados, Bianca Sánchez Tovar, Rita Fernández Domene, Ramón Manuel Garcia-Anton, Jose 2017 Influence of the Heating Rate on the Annealing Treatment of Iron Oxide Nanostructures Obtained by Electrochemical Anodization under Hydrodynamic Conditions Chemical Engineering Transactions 57 1633 1638
dc.identifier.uri	https://hdl.handle.net/10550/75855
dc.description.abstract	Iron oxide nanostructures are promising materials for photoelectrochemical applications such as water splitting. In this work, electrochemical anodization of iron is used to form different iron oxide nanostructures, and the influence of different anodization parameters was studied in order to find the most suitable nanostructure for photocatalysis applications. On the one hand, hydrodynamic conditions were evaluated by stirring the electrode at different rotation speeds during the electrochemical anodization to check their influence on the formation of the nanostructures. On the other hand, different heating rates during the annealing treatment were studied for obtaining efficient iron oxide nanostructures. The synthesized nanostructures were characterized by different techniques such as photocurrent density vs. potential measurements, Field Emission Scanning Electron Microscopy, Raman spectroscopy and Incident Photon-toelectron Conversion Efficiency (IPCE). The results revealed that the best heating rate during the annealing treatment is 15 ºC·min-1 and that the hydrodynamic conditions allow the formation of nanotubular iron oxide structures achieving ~0.1 mA·cm-2 at 0.5 V (vs. Ag/AgCl) in the water splitting measurements. Moreover, all the nanostructures are mainly composed by hematite (α-Fe2O3) with some amount of magnetite (Fe3O4) in their structure. Finally, the IPCE measurements showed that the best rotation speed during the electrochemical anodization for the formation of an efficient iron oxide nanostructure for photocatalysis applications is 1,000 rpm.
dc.language.iso	eng
dc.relation.ispartof	Chemical Engineering Transactions, 2017, vol. 57, p. 1633-1638
dc.subject	Electroquímica
dc.subject	Materials
dc.title	Influence of the Heating Rate on the Annealing Treatment of Iron Oxide Nanostructures Obtained by Electrochemical Anodization under Hydrodynamic Conditions
dc.type	journal article	es_ES
dc.date.updated	2020-10-15T14:46:34Z
dc.identifier.doi	10.3303/CET1757273
dc.identifier.idgrec	140769
dc.rights.accessRights	open access	es_ES