Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.21/10051 |
Resumo: | TiO2 and TM-doped TiO2 (TM = Re, Ru) anatase crystalline nanopowders were synthesized by a simple hydrothermal method. Samples with nominal TM/Ti ratio of 0.01 were prepared for this study. Their structural, microstructural and optical properties were studied. The lattice parameters of the different prepared samples were calculated and their mean crystallite sizes determined to be in the range 15–7 nm, the lower values being obtained for the doped crystallites. The samples’ specific surface areas were determined and correlated with their mean crystallite sizes. The incorporation of the dopant elements results in an increase of the optical absorption in the visible range. The samples’ optical bandgap and Urbach energies were calculated from UV–Vis diffuse reflectance spectra. The photocatalytic behavior of the synthesized samples was investigated for the rhodamine B and phenol degradation processes, the kinetics of the different photo-oxidation reactions being also studied. The results showed that doping either with Re or Ru can lead to enhancement of the TiO2 photocatalytic efficiency and that, among the synthesized samples Ru-doped TiO2 is the most efficient photocatalyst for both the Rhodamine B and phenol photodegradation reactions. |
id |
RCAP_e6567314560e8230cd42f12b8af74b7d |
---|---|
oai_identifier_str |
oai:repositorio.ipl.pt:10400.21/10051 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2TM-TiO2 nanoparticlesOptical bandgapUrbach energyPhotocatalysisOrganic pollutantsTiO2 and TM-doped TiO2 (TM = Re, Ru) anatase crystalline nanopowders were synthesized by a simple hydrothermal method. Samples with nominal TM/Ti ratio of 0.01 were prepared for this study. Their structural, microstructural and optical properties were studied. The lattice parameters of the different prepared samples were calculated and their mean crystallite sizes determined to be in the range 15–7 nm, the lower values being obtained for the doped crystallites. The samples’ specific surface areas were determined and correlated with their mean crystallite sizes. The incorporation of the dopant elements results in an increase of the optical absorption in the visible range. The samples’ optical bandgap and Urbach energies were calculated from UV–Vis diffuse reflectance spectra. The photocatalytic behavior of the synthesized samples was investigated for the rhodamine B and phenol degradation processes, the kinetics of the different photo-oxidation reactions being also studied. The results showed that doping either with Re or Ru can lead to enhancement of the TiO2 photocatalytic efficiency and that, among the synthesized samples Ru-doped TiO2 is the most efficient photocatalyst for both the Rhodamine B and phenol photodegradation reactions.Springer NatureRCIPLBarrocas, BeatrizMonteiro, OlindaNunes, Manuel R.Silvestre, António Jorge2019-05-24T08:07:49Z2019-062019-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/10051engBARROCAS, Beatriz; [et al] – Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2. SN Applied Sciences. ISSN 2523-3963. Vol. 1, N.º 6 (2019), pp. 1-122523-3963https://doi.org/10.1007/s42452-019-0567-4metadata only accessinfo: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:RCAAP2023-08-03T09:59:32Zoai:repositorio.ipl.pt:10400.21/10051Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:18:32.678373Repositório 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 |
Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2 |
title |
Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2 |
spellingShingle |
Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2 Barrocas, Beatriz TM-TiO2 nanoparticles Optical bandgap Urbach energy Photocatalysis Organic pollutants |
title_short |
Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2 |
title_full |
Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2 |
title_fullStr |
Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2 |
title_full_unstemmed |
Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2 |
title_sort |
Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2 |
author |
Barrocas, Beatriz |
author_facet |
Barrocas, Beatriz Monteiro, Olinda Nunes, Manuel R. Silvestre, António Jorge |
author_role |
author |
author2 |
Monteiro, Olinda Nunes, Manuel R. Silvestre, António Jorge |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Barrocas, Beatriz Monteiro, Olinda Nunes, Manuel R. Silvestre, António Jorge |
dc.subject.por.fl_str_mv |
TM-TiO2 nanoparticles Optical bandgap Urbach energy Photocatalysis Organic pollutants |
topic |
TM-TiO2 nanoparticles Optical bandgap Urbach energy Photocatalysis Organic pollutants |
description |
TiO2 and TM-doped TiO2 (TM = Re, Ru) anatase crystalline nanopowders were synthesized by a simple hydrothermal method. Samples with nominal TM/Ti ratio of 0.01 were prepared for this study. Their structural, microstructural and optical properties were studied. The lattice parameters of the different prepared samples were calculated and their mean crystallite sizes determined to be in the range 15–7 nm, the lower values being obtained for the doped crystallites. The samples’ specific surface areas were determined and correlated with their mean crystallite sizes. The incorporation of the dopant elements results in an increase of the optical absorption in the visible range. The samples’ optical bandgap and Urbach energies were calculated from UV–Vis diffuse reflectance spectra. The photocatalytic behavior of the synthesized samples was investigated for the rhodamine B and phenol degradation processes, the kinetics of the different photo-oxidation reactions being also studied. The results showed that doping either with Re or Ru can lead to enhancement of the TiO2 photocatalytic efficiency and that, among the synthesized samples Ru-doped TiO2 is the most efficient photocatalyst for both the Rhodamine B and phenol photodegradation reactions. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-05-24T08:07:49Z 2019-06 2019-06-01T00:00:00Z |
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/10400.21/10051 |
url |
http://hdl.handle.net/10400.21/10051 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
BARROCAS, Beatriz; [et al] – Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2. SN Applied Sciences. ISSN 2523-3963. Vol. 1, N.º 6 (2019), pp. 1-12 2523-3963 https://doi.org/10.1007/s42452-019-0567-4 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Springer Nature |
publisher.none.fl_str_mv |
Springer Nature |
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 |
|
_version_ |
1799133450073014272 |