ZnO twin-rods decorated with Pt nanoparticles for butanone detection
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/d0nj03206a http://hdl.handle.net/11449/205366 |
Resumo: | Sensors of volatile organic compounds (VOCs) are of great importance for environmental monitoring. Nevertheless, it is a great challenge to develop highly sensitive and selective sensors. In this sense, we report the synthesis of ZnO twin-rods via a combination of the ultrasonic spray nozzle and microwave-assisted hydrothermal methods, which were then loaded with platinum (Pt) nanoparticles (NPs) to obtain Pt/ZnO heterostructures. The VOC detection tests revealed that the 2% Pt/ZnO heterostructure was the best composition, which showed an improved response of 35.2 to 100 ppm of butanone at 450 °C, with high sensitivity to detect low concentrations of butanone (5 ppm) as well as high selectivity and stability. X-ray absorption spectroscopy studies revealed the presence of oxidized Pt species (PtOx) under optimal operating conditions. Thus, the enhanced sensitivity of 2% Pt/ZnO can be attributed to the p-n junction at the PtOx/ZnO interface. |
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Repositório Institucional da UNESP |
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spelling |
ZnO twin-rods decorated with Pt nanoparticles for butanone detectionSensors of volatile organic compounds (VOCs) are of great importance for environmental monitoring. Nevertheless, it is a great challenge to develop highly sensitive and selective sensors. In this sense, we report the synthesis of ZnO twin-rods via a combination of the ultrasonic spray nozzle and microwave-assisted hydrothermal methods, which were then loaded with platinum (Pt) nanoparticles (NPs) to obtain Pt/ZnO heterostructures. The VOC detection tests revealed that the 2% Pt/ZnO heterostructure was the best composition, which showed an improved response of 35.2 to 100 ppm of butanone at 450 °C, with high sensitivity to detect low concentrations of butanone (5 ppm) as well as high selectivity and stability. X-ray absorption spectroscopy studies revealed the presence of oxidized Pt species (PtOx) under optimal operating conditions. Thus, the enhanced sensitivity of 2% Pt/ZnO can be attributed to the p-n junction at the PtOx/ZnO interface.Laboratory of Materials for Sustainability (LabMatSus) Ibilce São Paulo State University (Unesp), R. Cristóvão Colombo 2265Institute of Physics Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500Brazilian Synchrotron Light Laboratory (LNLS) CNPEM, R. Giuseppe Máximo Scolfaro 10.000Laboratory of Materials for Sustainability (LabMatSus) Ibilce São Paulo State University (Unesp), R. Cristóvão Colombo 2265Universidade Estadual Paulista (Unesp)Federal University of Rio Grande do Sul (UFRGS)CNPEMOliveira, Taís N.T. [UNESP]Zito, Cecilia A. [UNESP]Perfecto, Tarcísio M. [UNESP]Azevedo, Gustavo M.Volanti, Diogo P. [UNESP]2021-06-25T10:14:11Z2021-06-25T10:14:11Z2020-09-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article15574-15583http://dx.doi.org/10.1039/d0nj03206aNew Journal of Chemistry, v. 44, n. 36, p. 15574-15583, 2020.1369-92611144-0546http://hdl.handle.net/11449/20536610.1039/d0nj03206a2-s2.0-85093695881Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengNew Journal of Chemistryinfo:eu-repo/semantics/openAccess2021-10-23T12:39:38Zoai:repositorio.unesp.br:11449/205366Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:32:13.538076Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
ZnO twin-rods decorated with Pt nanoparticles for butanone detection |
title |
ZnO twin-rods decorated with Pt nanoparticles for butanone detection |
spellingShingle |
ZnO twin-rods decorated with Pt nanoparticles for butanone detection Oliveira, Taís N.T. [UNESP] |
title_short |
ZnO twin-rods decorated with Pt nanoparticles for butanone detection |
title_full |
ZnO twin-rods decorated with Pt nanoparticles for butanone detection |
title_fullStr |
ZnO twin-rods decorated with Pt nanoparticles for butanone detection |
title_full_unstemmed |
ZnO twin-rods decorated with Pt nanoparticles for butanone detection |
title_sort |
ZnO twin-rods decorated with Pt nanoparticles for butanone detection |
author |
Oliveira, Taís N.T. [UNESP] |
author_facet |
Oliveira, Taís N.T. [UNESP] Zito, Cecilia A. [UNESP] Perfecto, Tarcísio M. [UNESP] Azevedo, Gustavo M. Volanti, Diogo P. [UNESP] |
author_role |
author |
author2 |
Zito, Cecilia A. [UNESP] Perfecto, Tarcísio M. [UNESP] Azevedo, Gustavo M. Volanti, Diogo P. [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Federal University of Rio Grande do Sul (UFRGS) CNPEM |
dc.contributor.author.fl_str_mv |
Oliveira, Taís N.T. [UNESP] Zito, Cecilia A. [UNESP] Perfecto, Tarcísio M. [UNESP] Azevedo, Gustavo M. Volanti, Diogo P. [UNESP] |
description |
Sensors of volatile organic compounds (VOCs) are of great importance for environmental monitoring. Nevertheless, it is a great challenge to develop highly sensitive and selective sensors. In this sense, we report the synthesis of ZnO twin-rods via a combination of the ultrasonic spray nozzle and microwave-assisted hydrothermal methods, which were then loaded with platinum (Pt) nanoparticles (NPs) to obtain Pt/ZnO heterostructures. The VOC detection tests revealed that the 2% Pt/ZnO heterostructure was the best composition, which showed an improved response of 35.2 to 100 ppm of butanone at 450 °C, with high sensitivity to detect low concentrations of butanone (5 ppm) as well as high selectivity and stability. X-ray absorption spectroscopy studies revealed the presence of oxidized Pt species (PtOx) under optimal operating conditions. Thus, the enhanced sensitivity of 2% Pt/ZnO can be attributed to the p-n junction at the PtOx/ZnO interface. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-09-28 2021-06-25T10:14:11Z 2021-06-25T10:14:11Z |
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://dx.doi.org/10.1039/d0nj03206a New Journal of Chemistry, v. 44, n. 36, p. 15574-15583, 2020. 1369-9261 1144-0546 http://hdl.handle.net/11449/205366 10.1039/d0nj03206a 2-s2.0-85093695881 |
url |
http://dx.doi.org/10.1039/d0nj03206a http://hdl.handle.net/11449/205366 |
identifier_str_mv |
New Journal of Chemistry, v. 44, n. 36, p. 15574-15583, 2020. 1369-9261 1144-0546 10.1039/d0nj03206a 2-s2.0-85093695881 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
New Journal of Chemistry |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
15574-15583 |
dc.source.none.fl_str_mv |
Scopus 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 |
|
_version_ |
1808129215735791616 |