Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence properties
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1039/d0ce00876a http://hdl.handle.net/11449/208948 |
Resumo: | In this study, we report the potential of ethylenediamine (En) in the modification of the morphological, structural, optical and catalytic properties of alpha-Ag2WO4 crystals decorated with Ag nanoparticles (Ag NPs). Experimental techniques were used to characterize the as-synthesized samples such as X-ray diffraction, Raman, electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and photoluminescence spectroscopy. The results confirmed the efficiency of En in the decoration with the formation of Ag/alpha-Ag2WO4 crystals and also the modification of alpha-Ag2WO4 morphology that indicated its influence on the crystal growth mechanism via self-assembly and Ostwald ripening. En affects the degree of order/disorder of the crystalline structures in long and short-ranges. In addition, photoluminescence measurements revealed a blue shift of the optical emission caused by a reduction of oxygen vacancies and an increase in structural disorder due to the En concentration used in the synthesis processes. Regarding the photocatalysis experiments, the reduction in oxygen vacancies also caused a decrease in the photoactivity of alpha-Ag2WO4 against the rhodamine B dye, thus confirming the relevance of oxygen vacancies for the development of alpha-Ag2WO4 photocatalysts. |
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Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence propertiesIn this study, we report the potential of ethylenediamine (En) in the modification of the morphological, structural, optical and catalytic properties of alpha-Ag2WO4 crystals decorated with Ag nanoparticles (Ag NPs). Experimental techniques were used to characterize the as-synthesized samples such as X-ray diffraction, Raman, electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and photoluminescence spectroscopy. The results confirmed the efficiency of En in the decoration with the formation of Ag/alpha-Ag2WO4 crystals and also the modification of alpha-Ag2WO4 morphology that indicated its influence on the crystal growth mechanism via self-assembly and Ostwald ripening. En affects the degree of order/disorder of the crystalline structures in long and short-ranges. In addition, photoluminescence measurements revealed a blue shift of the optical emission caused by a reduction of oxygen vacancies and an increase in structural disorder due to the En concentration used in the synthesis processes. Regarding the photocatalysis experiments, the reduction in oxygen vacancies also caused a decrease in the photoactivity of alpha-Ag2WO4 against the rhodamine B dye, thus confirming the relevance of oxygen vacancies for the development of alpha-Ag2WO4 photocatalysts.LNLS, Campinas, SP, BrazilConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Univ Fed Sao Carlos, Ctr Dev Funct Mat, Rod Washington Luiz,Km 235, BR-13565904 Sao Carlos, SP, BrazilSao Paulo State Univ, Interdisciplinary Lab Ceram Studies, BR-14800900 Araraquara, SP, BrazilUniv Estadual Campinas, Inst Chem, Dept Phys Chem, BR-13083970 Campinas, SP, BrazilUniv Fed Sao Carlos, Dept Phys, Rod Washington Luiz,Km 235, BR-13565905 Sao Carlos, SP, BrazilSao Paulo State Univ, Interdisciplinary Lab Ceram Studies, BR-14800900 Araraquara, SP, BrazilLNLS, Campinas, SP, Brazil: XAFS2-20180338CNPq: 443733/2018-0FAPESP: 2013/07296-2FAPESP: 2017/12437-5CAPES: 001Royal Soc ChemistryUniversidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Universidade Estadual de Campinas (UNICAMP)Cruz, LilianTeixeira, Mayara M.Teodoro, ViniciusJacomaci, Natalia [UNESP]Laier, Leticia O. [UNESP]Assis, MarceloMacedo, Nadia G.Tello, Ana C. M.Silva, Luis F.Marques, Gilmar E.Zaghete, Maria A. [UNESP]Teodoro, Marcio D.Longo, Elson2021-06-25T11:44:01Z2021-06-25T11:44:01Z2020-12-07info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article7903-7917http://dx.doi.org/10.1039/d0ce00876aCrystengcomm. Cambridge: Royal Soc Chemistry, v. 22, n. 45, p. 7903-7917, 2020.1466-8033http://hdl.handle.net/11449/20894810.1039/d0ce00876aWOS:000592063600018Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCrystengcomminfo:eu-repo/semantics/openAccess2021-10-23T19:23:25Zoai:repositorio.unesp.br:11449/208948Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T19:23:25Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence properties |
title |
Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence properties |
spellingShingle |
Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence properties Cruz, Lilian |
title_short |
Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence properties |
title_full |
Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence properties |
title_fullStr |
Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence properties |
title_full_unstemmed |
Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence properties |
title_sort |
Multi-dimensional architecture of Ag/alpha-Ag2WO4 crystals: insights into microstructural, morphological, and photoluminescence properties |
author |
Cruz, Lilian |
author_facet |
Cruz, Lilian Teixeira, Mayara M. Teodoro, Vinicius Jacomaci, Natalia [UNESP] Laier, Leticia O. [UNESP] Assis, Marcelo Macedo, Nadia G. Tello, Ana C. M. Silva, Luis F. Marques, Gilmar E. Zaghete, Maria A. [UNESP] Teodoro, Marcio D. Longo, Elson |
author_role |
author |
author2 |
Teixeira, Mayara M. Teodoro, Vinicius Jacomaci, Natalia [UNESP] Laier, Leticia O. [UNESP] Assis, Marcelo Macedo, Nadia G. Tello, Ana C. M. Silva, Luis F. Marques, Gilmar E. Zaghete, Maria A. [UNESP] Teodoro, Marcio D. Longo, Elson |
author2_role |
author author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Universidade Estadual Paulista (Unesp) Universidade Estadual de Campinas (UNICAMP) |
dc.contributor.author.fl_str_mv |
Cruz, Lilian Teixeira, Mayara M. Teodoro, Vinicius Jacomaci, Natalia [UNESP] Laier, Leticia O. [UNESP] Assis, Marcelo Macedo, Nadia G. Tello, Ana C. M. Silva, Luis F. Marques, Gilmar E. Zaghete, Maria A. [UNESP] Teodoro, Marcio D. Longo, Elson |
description |
In this study, we report the potential of ethylenediamine (En) in the modification of the morphological, structural, optical and catalytic properties of alpha-Ag2WO4 crystals decorated with Ag nanoparticles (Ag NPs). Experimental techniques were used to characterize the as-synthesized samples such as X-ray diffraction, Raman, electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and photoluminescence spectroscopy. The results confirmed the efficiency of En in the decoration with the formation of Ag/alpha-Ag2WO4 crystals and also the modification of alpha-Ag2WO4 morphology that indicated its influence on the crystal growth mechanism via self-assembly and Ostwald ripening. En affects the degree of order/disorder of the crystalline structures in long and short-ranges. In addition, photoluminescence measurements revealed a blue shift of the optical emission caused by a reduction of oxygen vacancies and an increase in structural disorder due to the En concentration used in the synthesis processes. Regarding the photocatalysis experiments, the reduction in oxygen vacancies also caused a decrease in the photoactivity of alpha-Ag2WO4 against the rhodamine B dye, thus confirming the relevance of oxygen vacancies for the development of alpha-Ag2WO4 photocatalysts. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-07 2021-06-25T11:44:01Z 2021-06-25T11:44:01Z |
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://dx.doi.org/10.1039/d0ce00876a Crystengcomm. Cambridge: Royal Soc Chemistry, v. 22, n. 45, p. 7903-7917, 2020. 1466-8033 http://hdl.handle.net/11449/208948 10.1039/d0ce00876a WOS:000592063600018 |
url |
http://dx.doi.org/10.1039/d0ce00876a http://hdl.handle.net/11449/208948 |
identifier_str_mv |
Crystengcomm. Cambridge: Royal Soc Chemistry, v. 22, n. 45, p. 7903-7917, 2020. 1466-8033 10.1039/d0ce00876a WOS:000592063600018 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Crystengcomm |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
7903-7917 |
dc.publisher.none.fl_str_mv |
Royal Soc Chemistry |
publisher.none.fl_str_mv |
Royal Soc Chemistry |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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