Synthesis and characterization of efficient TiO2 mesoporous photocatalysts

Detalhes bibliográficos
Autor(a) principal: Ovodok, Evgeni
Data de Publicação: 2017
Outros Autores: Maltanava, Hanna, Poznyak, Sergey, Ivanovskaya, Maria, Kudlash, Alexander, Scharnagl, Nico, Tedim, João
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/24932
Resumo: Mesoporous TiO2 powder with large surface area and high porosity was prepared via template-free method of heat-stimulated oxidizing destruction of TiC by HNO3. Anatase crystalline phase of as-prepared and annealed at 200−400 °C titania was confirmed by XRD technique. Surface nitrate-nitro groups responsible for high adsorption capacity of the TiO2 powders were studied by FTIR spectroscopy. The annealing temperature can be used as a factor for regulation of titania morphology and structural properties. The rise in the annealing temperature higher than the temperature of nitrate-nitro groups decomposition induces the growth of TiO2 crystallites, decreasing porosity and surface area, the drop of adsorption capacity, and improving photocatalytic activity under UV irradiation.
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spelling Synthesis and characterization of efficient TiO2 mesoporous photocatalystsTitanium dioxideMesoporous materialsPhotocatalystMesoporous TiO2 powder with large surface area and high porosity was prepared via template-free method of heat-stimulated oxidizing destruction of TiC by HNO3. Anatase crystalline phase of as-prepared and annealed at 200−400 °C titania was confirmed by XRD technique. Surface nitrate-nitro groups responsible for high adsorption capacity of the TiO2 powders were studied by FTIR spectroscopy. The annealing temperature can be used as a factor for regulation of titania morphology and structural properties. The rise in the annealing temperature higher than the temperature of nitrate-nitro groups decomposition induces the growth of TiO2 crystallites, decreasing porosity and surface area, the drop of adsorption capacity, and improving photocatalytic activity under UV irradiation.Elsevier2018-12-18T12:23:11Z2017-01-01T00:00:00Z2017info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/24932eng10.1016/j.matpr.2017.09.062Ovodok, EvgeniMaltanava, HannaPoznyak, SergeyIvanovskaya, MariaKudlash, AlexanderScharnagl, NicoTedim, Joãoinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-06T04:18:32Zoai:ria.ua.pt:10773/24932Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-06T04:18:32Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
title Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
spellingShingle Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
Ovodok, Evgeni
Titanium dioxide
Mesoporous materials
Photocatalyst
title_short Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
title_full Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
title_fullStr Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
title_full_unstemmed Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
title_sort Synthesis and characterization of efficient TiO2 mesoporous photocatalysts
author Ovodok, Evgeni
author_facet Ovodok, Evgeni
Maltanava, Hanna
Poznyak, Sergey
Ivanovskaya, Maria
Kudlash, Alexander
Scharnagl, Nico
Tedim, João
author_role author
author2 Maltanava, Hanna
Poznyak, Sergey
Ivanovskaya, Maria
Kudlash, Alexander
Scharnagl, Nico
Tedim, João
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Ovodok, Evgeni
Maltanava, Hanna
Poznyak, Sergey
Ivanovskaya, Maria
Kudlash, Alexander
Scharnagl, Nico
Tedim, João
dc.subject.por.fl_str_mv Titanium dioxide
Mesoporous materials
Photocatalyst
topic Titanium dioxide
Mesoporous materials
Photocatalyst
description Mesoporous TiO2 powder with large surface area and high porosity was prepared via template-free method of heat-stimulated oxidizing destruction of TiC by HNO3. Anatase crystalline phase of as-prepared and annealed at 200−400 °C titania was confirmed by XRD technique. Surface nitrate-nitro groups responsible for high adsorption capacity of the TiO2 powders were studied by FTIR spectroscopy. The annealing temperature can be used as a factor for regulation of titania morphology and structural properties. The rise in the annealing temperature higher than the temperature of nitrate-nitro groups decomposition induces the growth of TiO2 crystallites, decreasing porosity and surface area, the drop of adsorption capacity, and improving photocatalytic activity under UV irradiation.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-01T00:00:00Z
2017
2018-12-18T12:23:11Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10773/24932
url http://hdl.handle.net/10773/24932
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1016/j.matpr.2017.09.062
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.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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