Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
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/1822/64127 |
Resumo: | In the last decades, photocatalysis has arisen as a solution to degrade emerging pollutants such as antibiotics. However, the reduced photoactivation of TiO2 under visible radiation constitutes a major drawback because 95% of sunlight radiation is not being used in this process. Thus, it is critical to modify TiO2 nanoparticles to improve the ability to absorb visible radiation from sunlight. This work reports on the synthesis of TiO2 nanoparticles decorated with gold (Au) nanoparticles by deposition-precipitation method for enhanced photocatalytic activity. The produced nanocomposites absorb 40% to 55% more radiation in the visible range than pristine TiO2, the best results being obtained for the synthesis performed at 25 °C and with Au loading of 0.05 to 0.1 wt. %. Experimental tests yielded a higher photocatalytic degradation of 91% and 49% of ciprofloxacin (5 mg/L) under UV and visible radiation, correspondingly. Computational modeling supports the experimental results, showing the ability of Au to bind TiO2 anatase surfaces, the relevant role of Au transferring electrons, and the high affinity of ciprofloxacin to both Au and TiO2 surfaces. Hence, the present work represents a reliable approach to produce efficient photocatalytic materials and an overall contribution in the development of high-performance Au/TiO2 photocatalytic nanostructures through the optimization of the synthesis parameters, photocatalytic conditions, and computational modeling. |
id |
RCAP_d22492853bc94fac64db025d2c4018c8 |
---|---|
oai_identifier_str |
oai:repositorium.sdum.uminho.pt:1822/64127 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacinAu-TiO2antibioticsemergent contaminantsnanocatalystphotocatalysisGFN-xTBScience & TechnologyIn the last decades, photocatalysis has arisen as a solution to degrade emerging pollutants such as antibiotics. However, the reduced photoactivation of TiO2 under visible radiation constitutes a major drawback because 95% of sunlight radiation is not being used in this process. Thus, it is critical to modify TiO2 nanoparticles to improve the ability to absorb visible radiation from sunlight. This work reports on the synthesis of TiO2 nanoparticles decorated with gold (Au) nanoparticles by deposition-precipitation method for enhanced photocatalytic activity. The produced nanocomposites absorb 40% to 55% more radiation in the visible range than pristine TiO2, the best results being obtained for the synthesis performed at 25 °C and with Au loading of 0.05 to 0.1 wt. %. Experimental tests yielded a higher photocatalytic degradation of 91% and 49% of ciprofloxacin (5 mg/L) under UV and visible radiation, correspondingly. Computational modeling supports the experimental results, showing the ability of Au to bind TiO2 anatase surfaces, the relevant role of Au transferring electrons, and the high affinity of ciprofloxacin to both Au and TiO2 surfaces. Hence, the present work represents a reliable approach to produce efficient photocatalytic materials and an overall contribution in the development of high-performance Au/TiO2 photocatalytic nanostructures through the optimization of the synthesis parameters, photocatalytic conditions, and computational modeling.This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the strategic projects UID/FIS/04650/2013 by Fundo Europeu de Desenvolvimento Regional (FEDER) funds through the COMPETE 2020—Programa Operacional Competitividade e Internacionalização (POCI) with the reference project POCI-01-0145-FEDER-006941, project PTDC/CTM-ENE/5387/2014, as well as UID/BIO/04469 unit through COMPETE 2020 (POCI-01-0145-FEDER-006684) and BioTecNorte operation (NORTE-01-0145-FEDER-000004) funded by the European Regional Development Fund under the scope of Norte2020—Programa Operacional Regional do Norte. P.M. Martins thanks the FCT for the grant SFRH/BD/98616/2013 and Luciana Pereira for the grant SFRH/BPD/110235/2015. M. Melle-Franco would like to acknowledge support from Centro de Investigação em Materiais Cerâmicos e Compósitos (CICECO)—Aveiro Institute of Materials, POCI-01-0145-FEDER007679 (UID/CTM/50011/2013) and the FCT (IF/00894/2015).info:eu-repo/semantics/publishedVersionMultidisciplinary Digital Publishing Institute (MDPI)Universidade do MinhoMartins, Pedro Manuel AbreuKappert, SandroNga Le, HoaiSebastian, VictorKühn, KlausAlves, M. M.Pereira, LucianaCuniberti, GianaurelioMelle-Franco, ManuelLanceros-Méndez, S.2020-02-152020-02-15T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/64127engMartins, Pedro M.; Kappert, Sandro; Nga Le, Hoai; Sebastian, Victor; Kühn, Klaus; Alves, M. Madalena; Pereira, Luciana; Cuniberti, Gianaurelio; Melle-Franco, Manuel; Lanceros-Méndez, Senentxu, Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin. Catalysts, 10(2), 234, 2020.2073-434410.3390/catal10020234info: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:RCAAP2023-07-21T11:55:26Zoai:repositorium.sdum.uminho.pt:1822/64127Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:44:59.824591Repositório 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 |
Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin |
title |
Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin |
spellingShingle |
Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin Martins, Pedro Manuel Abreu Au-TiO2 antibiotics emergent contaminants nanocatalyst photocatalysis GFN-xTB Science & Technology |
title_short |
Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin |
title_full |
Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin |
title_fullStr |
Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin |
title_full_unstemmed |
Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin |
title_sort |
Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin |
author |
Martins, Pedro Manuel Abreu |
author_facet |
Martins, Pedro Manuel Abreu Kappert, Sandro Nga Le, Hoai Sebastian, Victor Kühn, Klaus Alves, M. M. Pereira, Luciana Cuniberti, Gianaurelio Melle-Franco, Manuel Lanceros-Méndez, S. |
author_role |
author |
author2 |
Kappert, Sandro Nga Le, Hoai Sebastian, Victor Kühn, Klaus Alves, M. M. Pereira, Luciana Cuniberti, Gianaurelio Melle-Franco, Manuel Lanceros-Méndez, S. |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Martins, Pedro Manuel Abreu Kappert, Sandro Nga Le, Hoai Sebastian, Victor Kühn, Klaus Alves, M. M. Pereira, Luciana Cuniberti, Gianaurelio Melle-Franco, Manuel Lanceros-Méndez, S. |
dc.subject.por.fl_str_mv |
Au-TiO2 antibiotics emergent contaminants nanocatalyst photocatalysis GFN-xTB Science & Technology |
topic |
Au-TiO2 antibiotics emergent contaminants nanocatalyst photocatalysis GFN-xTB Science & Technology |
description |
In the last decades, photocatalysis has arisen as a solution to degrade emerging pollutants such as antibiotics. However, the reduced photoactivation of TiO2 under visible radiation constitutes a major drawback because 95% of sunlight radiation is not being used in this process. Thus, it is critical to modify TiO2 nanoparticles to improve the ability to absorb visible radiation from sunlight. This work reports on the synthesis of TiO2 nanoparticles decorated with gold (Au) nanoparticles by deposition-precipitation method for enhanced photocatalytic activity. The produced nanocomposites absorb 40% to 55% more radiation in the visible range than pristine TiO2, the best results being obtained for the synthesis performed at 25 °C and with Au loading of 0.05 to 0.1 wt. %. Experimental tests yielded a higher photocatalytic degradation of 91% and 49% of ciprofloxacin (5 mg/L) under UV and visible radiation, correspondingly. Computational modeling supports the experimental results, showing the ability of Au to bind TiO2 anatase surfaces, the relevant role of Au transferring electrons, and the high affinity of ciprofloxacin to both Au and TiO2 surfaces. Hence, the present work represents a reliable approach to produce efficient photocatalytic materials and an overall contribution in the development of high-performance Au/TiO2 photocatalytic nanostructures through the optimization of the synthesis parameters, photocatalytic conditions, and computational modeling. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-02-15 2020-02-15T00:00:00Z |
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/1822/64127 |
url |
http://hdl.handle.net/1822/64127 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Martins, Pedro M.; Kappert, Sandro; Nga Le, Hoai; Sebastian, Victor; Kühn, Klaus; Alves, M. Madalena; Pereira, Luciana; Cuniberti, Gianaurelio; Melle-Franco, Manuel; Lanceros-Méndez, Senentxu, Enhanced photocatalytic activity of Au/TiO2 nanoparticles against ciprofloxacin. Catalysts, 10(2), 234, 2020. 2073-4344 10.3390/catal10020234 |
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 |
Multidisciplinary Digital Publishing Institute (MDPI) |
publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute (MDPI) |
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_ |
1799132200922251264 |