Titanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activity

Detalhes bibliográficos
Autor(a) principal: Manique, Márcia Cardoso
Data de Publicação: 2017
Outros Autores: Silva, Aline Posteral, Alves, Annelise Kopp, Bergmann, Carlos Perez
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/223497
Resumo: A microwave-assisted hydrothermal (MAH) method was employed to synthesize TiO2 nanotubes (TNTs) and these were compared to the conventional hydrothermal (CH) method. The nanotubes were characterized for their crystallinity, morphology, surface area and photocatalytic activity. The TiO2 P25 was used for comparison purposes and efficiently degraded both dyes. However, methylene blue was adsorbed on the nanotube surfaces, which can be attributed to the electrostatic interaction between the cationic methylene blue and the negatively charged TNT surface. On the other hand, all nanotubes had a photocatalytic performance with methyl orange (anionic dye). Additional degradation was observed for nanotubes synthesized via the MAH method at 150 °C. This can be directly related to their larger surface area. Adsorption mechanisms of TNTs were also discussed by applying the Langmuir and Freundlich isotherm. The results show an efficient dye wastewater treatment through the application of TNT photocatalyst.
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spelling Manique, Márcia CardosoSilva, Aline PosteralAlves, Annelise KoppBergmann, Carlos Perez2021-07-09T04:38:05Z20170104-6632http://hdl.handle.net/10183/223497001024818A microwave-assisted hydrothermal (MAH) method was employed to synthesize TiO2 nanotubes (TNTs) and these were compared to the conventional hydrothermal (CH) method. The nanotubes were characterized for their crystallinity, morphology, surface area and photocatalytic activity. The TiO2 P25 was used for comparison purposes and efficiently degraded both dyes. However, methylene blue was adsorbed on the nanotube surfaces, which can be attributed to the electrostatic interaction between the cationic methylene blue and the negatively charged TNT surface. On the other hand, all nanotubes had a photocatalytic performance with methyl orange (anionic dye). Additional degradation was observed for nanotubes synthesized via the MAH method at 150 °C. This can be directly related to their larger surface area. Adsorption mechanisms of TNTs were also discussed by applying the Langmuir and Freundlich isotherm. The results show an efficient dye wastewater treatment through the application of TNT photocatalyst.application/pdfengBrazilian journal of chemical engineering. São Paulo, SP. Vol. 34, no. 1 (Jan./Mar. 2017), p. 331-339NanotubosÓxido de titânioFotocatálisePhotocatalysisTitanate nanotubesMicrowave-assisted hydrothermal synthesisAdsorptionTitanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activityinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001024818.pdf.txt001024818.pdf.txtExtracted Texttext/plain32048http://www.lume.ufrgs.br/bitstream/10183/223497/2/001024818.pdf.txt1262926ba478780dc5653307e27c6d47MD52ORIGINAL001024818.pdfTexto completo (inglês)application/pdf1075798http://www.lume.ufrgs.br/bitstream/10183/223497/1/001024818.pdf6fefb29f49ce86c7d52ac43f6ec88066MD5110183/2234972024-04-27 06:08:06.973433oai:www.lume.ufrgs.br:10183/223497Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-04-27T09:08:06Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Titanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activity
title Titanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activity
spellingShingle Titanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activity
Manique, Márcia Cardoso
Nanotubos
Óxido de titânio
Fotocatálise
Photocatalysis
Titanate nanotubes
Microwave-assisted hydrothermal synthesis
Adsorption
title_short Titanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activity
title_full Titanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activity
title_fullStr Titanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activity
title_full_unstemmed Titanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activity
title_sort Titanate nanotubes produced from microwave-assisted hydrothermal synthesis : characterization, adsorption and photocatalytic activity
author Manique, Márcia Cardoso
author_facet Manique, Márcia Cardoso
Silva, Aline Posteral
Alves, Annelise Kopp
Bergmann, Carlos Perez
author_role author
author2 Silva, Aline Posteral
Alves, Annelise Kopp
Bergmann, Carlos Perez
author2_role author
author
author
dc.contributor.author.fl_str_mv Manique, Márcia Cardoso
Silva, Aline Posteral
Alves, Annelise Kopp
Bergmann, Carlos Perez
dc.subject.por.fl_str_mv Nanotubos
Óxido de titânio
Fotocatálise
topic Nanotubos
Óxido de titânio
Fotocatálise
Photocatalysis
Titanate nanotubes
Microwave-assisted hydrothermal synthesis
Adsorption
dc.subject.eng.fl_str_mv Photocatalysis
Titanate nanotubes
Microwave-assisted hydrothermal synthesis
Adsorption
description A microwave-assisted hydrothermal (MAH) method was employed to synthesize TiO2 nanotubes (TNTs) and these were compared to the conventional hydrothermal (CH) method. The nanotubes were characterized for their crystallinity, morphology, surface area and photocatalytic activity. The TiO2 P25 was used for comparison purposes and efficiently degraded both dyes. However, methylene blue was adsorbed on the nanotube surfaces, which can be attributed to the electrostatic interaction between the cationic methylene blue and the negatively charged TNT surface. On the other hand, all nanotubes had a photocatalytic performance with methyl orange (anionic dye). Additional degradation was observed for nanotubes synthesized via the MAH method at 150 °C. This can be directly related to their larger surface area. Adsorption mechanisms of TNTs were also discussed by applying the Langmuir and Freundlich isotherm. The results show an efficient dye wastewater treatment through the application of TNT photocatalyst.
publishDate 2017
dc.date.issued.fl_str_mv 2017
dc.date.accessioned.fl_str_mv 2021-07-09T04:38:05Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/other
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/223497
dc.identifier.issn.pt_BR.fl_str_mv 0104-6632
dc.identifier.nrb.pt_BR.fl_str_mv 001024818
identifier_str_mv 0104-6632
001024818
url http://hdl.handle.net/10183/223497
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Brazilian journal of chemical engineering. São Paulo, SP. Vol. 34, no. 1 (Jan./Mar. 2017), p. 331-339
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRGS
instname:Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
instname_str Universidade Federal do Rio Grande do Sul (UFRGS)
instacron_str UFRGS
institution UFRGS
reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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