Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodes

Detalhes bibliográficos
Autor(a) principal: Ramírez-Santos,Álvaro A.
Data de Publicação: 2014
Outros Autores: Acevedo-Peña,Próspero, Córdoba,Elcy M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000100010
Resumo: TiO2 porous films were prepared on ITO coated glass slides by the sol-gel dip-coating method assisted with Polyethylene glycol (PEG). The films were used as photo-anodes in the photo-assisted electrolytic removal of cuprous ions in cyanide media. These were characterized by SEM, UV-Visible spectroscopy and XRD. The PEG modified films were free of cracks and developed a porous structure after heat treatment at 500 ºC, due to the thermal decomposition of the structure associated PEG. It was demonstrated that the photo-assisted electrochemical reduction of copper is promoted by the use of modified TiO2 films as photo-anodes, thanks to the greater surface area given by the PEG decomposition. However, the film thickness was found to be a critical factor in the process, to such an extent that films composed of 5 layers were completely inefficient, meaning that despite the open porosity, multilayered films acted as a barrier within the photo-electrolytic process.
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spelling Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodesporous TiO2 thin filmssol-gel dip-coatingpolyethylene glycol (PEG)photo-assisted electrolysiscopper ion removalTiO2 porous films were prepared on ITO coated glass slides by the sol-gel dip-coating method assisted with Polyethylene glycol (PEG). The films were used as photo-anodes in the photo-assisted electrolytic removal of cuprous ions in cyanide media. These were characterized by SEM, UV-Visible spectroscopy and XRD. The PEG modified films were free of cracks and developed a porous structure after heat treatment at 500 ºC, due to the thermal decomposition of the structure associated PEG. It was demonstrated that the photo-assisted electrochemical reduction of copper is promoted by the use of modified TiO2 films as photo-anodes, thanks to the greater surface area given by the PEG decomposition. However, the film thickness was found to be a critical factor in the process, to such an extent that films composed of 5 layers were completely inefficient, meaning that despite the open porosity, multilayered films acted as a barrier within the photo-electrolytic process.ABM, ABC, ABPol2014-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000100010Materials Research v.17 n.1 2014reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000150info:eu-repo/semantics/openAccessRamírez-Santos,Álvaro A.Acevedo-Peña,PrósperoCórdoba,Elcy M.eng2014-03-13T00:00:00Zoai:scielo:S1516-14392014000100010Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2014-03-13T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodes
title Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodes
spellingShingle Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodes
Ramírez-Santos,Álvaro A.
porous TiO2 thin films
sol-gel dip-coating
polyethylene glycol (PEG)
photo-assisted electrolysis
copper ion removal
title_short Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodes
title_full Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodes
title_fullStr Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodes
title_full_unstemmed Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodes
title_sort Photo-assisted electrochemical copper removal from cyanide solutions using porous TiO2 thin film photo-anodes
author Ramírez-Santos,Álvaro A.
author_facet Ramírez-Santos,Álvaro A.
Acevedo-Peña,Próspero
Córdoba,Elcy M.
author_role author
author2 Acevedo-Peña,Próspero
Córdoba,Elcy M.
author2_role author
author
dc.contributor.author.fl_str_mv Ramírez-Santos,Álvaro A.
Acevedo-Peña,Próspero
Córdoba,Elcy M.
dc.subject.por.fl_str_mv porous TiO2 thin films
sol-gel dip-coating
polyethylene glycol (PEG)
photo-assisted electrolysis
copper ion removal
topic porous TiO2 thin films
sol-gel dip-coating
polyethylene glycol (PEG)
photo-assisted electrolysis
copper ion removal
description TiO2 porous films were prepared on ITO coated glass slides by the sol-gel dip-coating method assisted with Polyethylene glycol (PEG). The films were used as photo-anodes in the photo-assisted electrolytic removal of cuprous ions in cyanide media. These were characterized by SEM, UV-Visible spectroscopy and XRD. The PEG modified films were free of cracks and developed a porous structure after heat treatment at 500 ºC, due to the thermal decomposition of the structure associated PEG. It was demonstrated that the photo-assisted electrochemical reduction of copper is promoted by the use of modified TiO2 films as photo-anodes, thanks to the greater surface area given by the PEG decomposition. However, the film thickness was found to be a critical factor in the process, to such an extent that films composed of 5 layers were completely inefficient, meaning that despite the open porosity, multilayered films acted as a barrier within the photo-electrolytic process.
publishDate 2014
dc.date.none.fl_str_mv 2014-02-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000100010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000100010
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392013005000150
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.17 n.1 2014
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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