Photoelectrochemical study of Ta3N5 nanotubes for water splitting
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Publication Date: | 2014 |
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Format: | Article |
Language: | eng |
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Summary: | Nanotubes (NTs) of Ta3N5 were synthesized by nitridation of Ta2O5 NTs. The samples were studied by scanning electron microscopy, UV-VIS spectrophotometry, x-ray diffraction and photoelectrochemical (PEC) measurements carried out in aqueous solutions of Na2SO4 and Fe(CN)6 3-/4-. The results show the presence of trapping states on illuminated pristine Ta3N5 NTs in Na2SO4 (aq). These trapping states act as recombination center for photogenerated holes, affecting the photocatalytic performance of Ta3N5 NTs. On the other hand, by using Fe(CN)6 3-/4- (aq) the photogenerated holes were scavenged efficiently without giving rise to the trapping states at Ta3N5 NTs/solution interface. The results obtained by cyclic voltammetry, linear sweep voltammetry and electrochemical impedance spectroscopy have shown that the presence of these trapping states is a limiting step for water oxidation using pristine Ta3N5 NTs. |
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Khan, SherdilSantos, Marcos José LeiteDupont, JairtonTeixeira, Sergio Ribeiro2016-10-01T02:15:58Z20141757-899Xhttp://hdl.handle.net/10183/148787000941519Nanotubes (NTs) of Ta3N5 were synthesized by nitridation of Ta2O5 NTs. The samples were studied by scanning electron microscopy, UV-VIS spectrophotometry, x-ray diffraction and photoelectrochemical (PEC) measurements carried out in aqueous solutions of Na2SO4 and Fe(CN)6 3-/4-. The results show the presence of trapping states on illuminated pristine Ta3N5 NTs in Na2SO4 (aq). These trapping states act as recombination center for photogenerated holes, affecting the photocatalytic performance of Ta3N5 NTs. On the other hand, by using Fe(CN)6 3-/4- (aq) the photogenerated holes were scavenged efficiently without giving rise to the trapping states at Ta3N5 NTs/solution interface. The results obtained by cyclic voltammetry, linear sweep voltammetry and electrochemical impedance spectroscopy have shown that the presence of these trapping states is a limiting step for water oxidation using pristine Ta3N5 NTs.application/pdfengIOP Conference series : materials science and engineering. [Bristol, UK]. Vol. 97 (2015), 7 p.Nitreto de tântaloNanotubosFotoeletroquímicaFotoluminescênciaAnodizaçãoPhotoelectrochemical study of Ta3N5 nanotubes for water splittingEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000941519.pdf000941519.pdfTexto completo (inglês)application/pdf1405129http://www.lume.ufrgs.br/bitstream/10183/148787/1/000941519.pdfb2ecadf700c249f73b25b4e137c2cd3eMD51TEXT000941519.pdf.txt000941519.pdf.txtExtracted Texttext/plain21340http://www.lume.ufrgs.br/bitstream/10183/148787/2/000941519.pdf.txt646f9a757f690e91dd1381fba44bfd6eMD52THUMBNAIL000941519.pdf.jpg000941519.pdf.jpgGenerated Thumbnailimage/jpeg1471http://www.lume.ufrgs.br/bitstream/10183/148787/3/000941519.pdf.jpgd1e143e50b7a942176c060de2599f646MD5310183/1487872023-08-10 03:32:28.143427oai:www.lume.ufrgs.br:10183/148787Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-10T06:32:28Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Photoelectrochemical study of Ta3N5 nanotubes for water splitting |
title |
Photoelectrochemical study of Ta3N5 nanotubes for water splitting |
spellingShingle |
Photoelectrochemical study of Ta3N5 nanotubes for water splitting Khan, Sherdil Nitreto de tântalo Nanotubos Fotoeletroquímica Fotoluminescência Anodização |
title_short |
Photoelectrochemical study of Ta3N5 nanotubes for water splitting |
title_full |
Photoelectrochemical study of Ta3N5 nanotubes for water splitting |
title_fullStr |
Photoelectrochemical study of Ta3N5 nanotubes for water splitting |
title_full_unstemmed |
Photoelectrochemical study of Ta3N5 nanotubes for water splitting |
title_sort |
Photoelectrochemical study of Ta3N5 nanotubes for water splitting |
author |
Khan, Sherdil |
author_facet |
Khan, Sherdil Santos, Marcos José Leite Dupont, Jairton Teixeira, Sergio Ribeiro |
author_role |
author |
author2 |
Santos, Marcos José Leite Dupont, Jairton Teixeira, Sergio Ribeiro |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Khan, Sherdil Santos, Marcos José Leite Dupont, Jairton Teixeira, Sergio Ribeiro |
dc.subject.por.fl_str_mv |
Nitreto de tântalo Nanotubos Fotoeletroquímica Fotoluminescência Anodização |
topic |
Nitreto de tântalo Nanotubos Fotoeletroquímica Fotoluminescência Anodização |
description |
Nanotubes (NTs) of Ta3N5 were synthesized by nitridation of Ta2O5 NTs. The samples were studied by scanning electron microscopy, UV-VIS spectrophotometry, x-ray diffraction and photoelectrochemical (PEC) measurements carried out in aqueous solutions of Na2SO4 and Fe(CN)6 3-/4-. The results show the presence of trapping states on illuminated pristine Ta3N5 NTs in Na2SO4 (aq). These trapping states act as recombination center for photogenerated holes, affecting the photocatalytic performance of Ta3N5 NTs. On the other hand, by using Fe(CN)6 3-/4- (aq) the photogenerated holes were scavenged efficiently without giving rise to the trapping states at Ta3N5 NTs/solution interface. The results obtained by cyclic voltammetry, linear sweep voltammetry and electrochemical impedance spectroscopy have shown that the presence of these trapping states is a limiting step for water oxidation using pristine Ta3N5 NTs. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014 |
dc.date.accessioned.fl_str_mv |
2016-10-01T02:15:58Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/148787 |
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eng |
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IOP Conference series : materials science and engineering. [Bristol, UK]. Vol. 97 (2015), 7 p. |
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openAccess |
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