High gas sensor performance of WO3 nanofibers prepared by electrospinning
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jallcom.2021.158745 http://hdl.handle.net/11449/205777 |
Resumo: | WO3 is a widely studied gas sensor material that commonly exhibits excellent sensitivity and selectivity toward NO2 detection. In this study, the influence of the heating rate on the thickness and grain size of WO3 nanofibers synthesized by electrospinning was evaluated. The materials were analyzed using XRD, Raman, and UV-Vis spectroscopies, as well as FEG-SEM, TG-DTA, and the BET method. Results showed that continuous nanofibers with particle size dependent on the heating rate were obtained at 500 °C. The gas sensing performance of WO3 nanofibers calcined at 10 °C/min (NF500–10) was investigated due to its higher surface area. NF500–10 device presented a high sensor signal for low and high NO2 concentrations at temperatures ranging from 150 °C to 300 °C. The sensor signals for 25 ppm of NO2 at 150 °C are substantially higher than those of several previous reports. Moreover, high selectivity against potential interferents (H2 and CO) was observed at all operating temperatures. A sensing mechanism based on the interaction between NO2 molecules and the surface of the WO3 nanofibers was proposed to explain the high sensor response. In conclusion, WO3 nanofibers were found to be an attractive sensing material to detect both low and high NO2 concentrations with excellent selectivity. |
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High gas sensor performance of WO3 nanofibers prepared by electrospinningElectrospinningGas sensorHigh selectivityNO2 selectivityTungsten trioxideWO3 is a widely studied gas sensor material that commonly exhibits excellent sensitivity and selectivity toward NO2 detection. In this study, the influence of the heating rate on the thickness and grain size of WO3 nanofibers synthesized by electrospinning was evaluated. The materials were analyzed using XRD, Raman, and UV-Vis spectroscopies, as well as FEG-SEM, TG-DTA, and the BET method. Results showed that continuous nanofibers with particle size dependent on the heating rate were obtained at 500 °C. The gas sensing performance of WO3 nanofibers calcined at 10 °C/min (NF500–10) was investigated due to its higher surface area. NF500–10 device presented a high sensor signal for low and high NO2 concentrations at temperatures ranging from 150 °C to 300 °C. The sensor signals for 25 ppm of NO2 at 150 °C are substantially higher than those of several previous reports. Moreover, high selectivity against potential interferents (H2 and CO) was observed at all operating temperatures. A sensing mechanism based on the interaction between NO2 molecules and the surface of the WO3 nanofibers was proposed to explain the high sensor response. In conclusion, WO3 nanofibers were found to be an attractive sensing material to detect both low and high NO2 concentrations with excellent selectivity.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Department of Engineering Physics and Mathematics São Paulo State University (UNESP)Department of Engineering Physics and Mathematics São Paulo State University (UNESP)FAPESP: #2016/20808-0FAPESP: #2017/26219-0CAPES: 88882.330127/2019-01Universidade Estadual Paulista (Unesp)Morais, Paulo V. [UNESP]Suman, Pedro H. [UNESP]Silva, Ranilson A. [UNESP]Orlandi, Marcelo O. [UNESP]2021-06-25T10:21:07Z2021-06-25T10:21:07Z2021-05-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jallcom.2021.158745Journal of Alloys and Compounds, v. 864.0925-8388http://hdl.handle.net/11449/20577710.1016/j.jallcom.2021.1587452-s2.0-85099816707Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Alloys and Compoundsinfo:eu-repo/semantics/openAccess2021-10-22T17:19:47Zoai:repositorio.unesp.br:11449/205777Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:09:02.914793Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
High gas sensor performance of WO3 nanofibers prepared by electrospinning |
title |
High gas sensor performance of WO3 nanofibers prepared by electrospinning |
spellingShingle |
High gas sensor performance of WO3 nanofibers prepared by electrospinning Morais, Paulo V. [UNESP] Electrospinning Gas sensor High selectivity NO2 selectivity Tungsten trioxide |
title_short |
High gas sensor performance of WO3 nanofibers prepared by electrospinning |
title_full |
High gas sensor performance of WO3 nanofibers prepared by electrospinning |
title_fullStr |
High gas sensor performance of WO3 nanofibers prepared by electrospinning |
title_full_unstemmed |
High gas sensor performance of WO3 nanofibers prepared by electrospinning |
title_sort |
High gas sensor performance of WO3 nanofibers prepared by electrospinning |
author |
Morais, Paulo V. [UNESP] |
author_facet |
Morais, Paulo V. [UNESP] Suman, Pedro H. [UNESP] Silva, Ranilson A. [UNESP] Orlandi, Marcelo O. [UNESP] |
author_role |
author |
author2 |
Suman, Pedro H. [UNESP] Silva, Ranilson A. [UNESP] Orlandi, Marcelo O. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Morais, Paulo V. [UNESP] Suman, Pedro H. [UNESP] Silva, Ranilson A. [UNESP] Orlandi, Marcelo O. [UNESP] |
dc.subject.por.fl_str_mv |
Electrospinning Gas sensor High selectivity NO2 selectivity Tungsten trioxide |
topic |
Electrospinning Gas sensor High selectivity NO2 selectivity Tungsten trioxide |
description |
WO3 is a widely studied gas sensor material that commonly exhibits excellent sensitivity and selectivity toward NO2 detection. In this study, the influence of the heating rate on the thickness and grain size of WO3 nanofibers synthesized by electrospinning was evaluated. The materials were analyzed using XRD, Raman, and UV-Vis spectroscopies, as well as FEG-SEM, TG-DTA, and the BET method. Results showed that continuous nanofibers with particle size dependent on the heating rate were obtained at 500 °C. The gas sensing performance of WO3 nanofibers calcined at 10 °C/min (NF500–10) was investigated due to its higher surface area. NF500–10 device presented a high sensor signal for low and high NO2 concentrations at temperatures ranging from 150 °C to 300 °C. The sensor signals for 25 ppm of NO2 at 150 °C are substantially higher than those of several previous reports. Moreover, high selectivity against potential interferents (H2 and CO) was observed at all operating temperatures. A sensing mechanism based on the interaction between NO2 molecules and the surface of the WO3 nanofibers was proposed to explain the high sensor response. In conclusion, WO3 nanofibers were found to be an attractive sensing material to detect both low and high NO2 concentrations with excellent selectivity. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:21:07Z 2021-06-25T10:21:07Z 2021-05-25 |
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/10.1016/j.jallcom.2021.158745 Journal of Alloys and Compounds, v. 864. 0925-8388 http://hdl.handle.net/11449/205777 10.1016/j.jallcom.2021.158745 2-s2.0-85099816707 |
url |
http://dx.doi.org/10.1016/j.jallcom.2021.158745 http://hdl.handle.net/11449/205777 |
identifier_str_mv |
Journal of Alloys and Compounds, v. 864. 0925-8388 10.1016/j.jallcom.2021.158745 2-s2.0-85099816707 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Alloys and Compounds |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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_ |
1808129495057563648 |