Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light

Detalhes bibliográficos
Autor(a) principal: Ovodok, Evgeni
Data de Publicação: 2018
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/10773/24934
Resumo: Mesoporous TiO2 powders with an anatase framework were synthesized through surfactant-assisted template method. The concentrated titania sol (7-8 wt.%) prepared from TiCl4 as a precursor was used in this synthesis. The soluble triblock copolymer Pluronic F127 was employed as a structure-directing agent and a carbon precursor to fabricate the carbon-doped mesoporous titania. The synthesized powders were characterized by XRD, HRTEM, Raman spectroscopy, UV-Vis reflectance spectroscopy, N2 adsorption/desorption and TG/DSC methods. The mesoporous titania annealed at 350° C was shown to have a high specific surface area up to 192 m2/g and a narrow pore size distribution. After annealing, carbon species in graphitic form were detected in the template-prepared TiO2 samples using Raman spectroscopy measurements. The photocatalytic performance of the samples was characterized in the process of Rhodamine B decomposition under visible light irradiation. The enhanced visible light photocatalytic efficiency of the template-prepared TiO2 powders as compared with that of Degussa P25 can be attributed to the associated effects of high specific surface area, pure anatase crystalline structure and carbon doping.
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spelling Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible lightTitanium dioxideMesoporous materialsSol-gelCarbon-dopedPhotocatalysisMesoporous TiO2 powders with an anatase framework were synthesized through surfactant-assisted template method. The concentrated titania sol (7-8 wt.%) prepared from TiCl4 as a precursor was used in this synthesis. The soluble triblock copolymer Pluronic F127 was employed as a structure-directing agent and a carbon precursor to fabricate the carbon-doped mesoporous titania. The synthesized powders were characterized by XRD, HRTEM, Raman spectroscopy, UV-Vis reflectance spectroscopy, N2 adsorption/desorption and TG/DSC methods. The mesoporous titania annealed at 350° C was shown to have a high specific surface area up to 192 m2/g and a narrow pore size distribution. After annealing, carbon species in graphitic form were detected in the template-prepared TiO2 samples using Raman spectroscopy measurements. The photocatalytic performance of the samples was characterized in the process of Rhodamine B decomposition under visible light irradiation. The enhanced visible light photocatalytic efficiency of the template-prepared TiO2 powders as compared with that of Degussa P25 can be attributed to the associated effects of high specific surface area, pure anatase crystalline structure and carbon doping.Elsevier2019-08-29T00:00:00Z2018-01-01T00:00:00Z2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/24934eng10.1016/j.matpr.2018.06.044Ovodok, 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:RCAAP2024-02-22T11:48:46Zoai:ria.ua.pt:10773/24934Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:58:27.306542Repositório 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 Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light
title Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light
spellingShingle Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light
Ovodok, Evgeni
Titanium dioxide
Mesoporous materials
Sol-gel
Carbon-doped
Photocatalysis
title_short Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light
title_full Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light
title_fullStr Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light
title_full_unstemmed Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light
title_sort Sol-gel template synthesis of mesoporous carbon-doped TiO2 with photocatalytic activity under visible light
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
Sol-gel
Carbon-doped
Photocatalysis
topic Titanium dioxide
Mesoporous materials
Sol-gel
Carbon-doped
Photocatalysis
description Mesoporous TiO2 powders with an anatase framework were synthesized through surfactant-assisted template method. The concentrated titania sol (7-8 wt.%) prepared from TiCl4 as a precursor was used in this synthesis. The soluble triblock copolymer Pluronic F127 was employed as a structure-directing agent and a carbon precursor to fabricate the carbon-doped mesoporous titania. The synthesized powders were characterized by XRD, HRTEM, Raman spectroscopy, UV-Vis reflectance spectroscopy, N2 adsorption/desorption and TG/DSC methods. The mesoporous titania annealed at 350° C was shown to have a high specific surface area up to 192 m2/g and a narrow pore size distribution. After annealing, carbon species in graphitic form were detected in the template-prepared TiO2 samples using Raman spectroscopy measurements. The photocatalytic performance of the samples was characterized in the process of Rhodamine B decomposition under visible light irradiation. The enhanced visible light photocatalytic efficiency of the template-prepared TiO2 powders as compared with that of Degussa P25 can be attributed to the associated effects of high specific surface area, pure anatase crystalline structure and carbon doping.
publishDate 2018
dc.date.none.fl_str_mv 2018-01-01T00:00:00Z
2018
2019-08-29T00:00:00Z
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/10773/24934
url http://hdl.handle.net/10773/24934
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1016/j.matpr.2018.06.044
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
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