Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunction
Autor(a) principal: | |
---|---|
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.snr.2021.100064 http://hdl.handle.net/11449/222996 |
Resumo: | Sensors of volatile organic compounds (VOCs) play a vital role in environmental monitoring. Although much progress has been made to develop new sensing materials, it remains challenging to detect a particular VOC selectively and without the interference of humidity. Herein, we report the effect of In2O3 nanoparticles on the VOC-sensing performance of ZnO twin-rods. The VOC-sensing tests were carried out in dry air and at a relative humidity (RH) of 26, 59, and 98%. The results indicated that the In2O3/ZnO heterostructure exhibited an improved sensing performance to triethylamine (TEA) compared to ZnO. In dry air, the responses to 100 ppm of TEA at 350 °C were 60.2 for the In2O3/ZnO heterostructure and 39.2 for pure ZnO. In2O3/ZnO even exhibited a high response of 6.2 to 1 ppm of TEA. Moreover, In2O3/ZnO exhibited a response to TEA up to 46.2 times higher than those of the other VOCs, indicating excellent selectivity. At 98% RH, the In2O3/ZnO heterostructure still had a high sensitivity to TEA, showing a response of 21.2 to 100 ppm of TEA with a response time of 1 s. The improved TEA-sensing performance of the In2O3/ZnO heterostructure can be attributed to the formation of the n-n heterojunction. |
id |
UNSP_33bca557573093b27ad48ab97d9cf08c |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/222996 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunctionChemoresistive sensorMicrowave-assisted hydrothermalN-n heterojunctionUltrasonic spray nozzleVolatile organic compoundsSensors of volatile organic compounds (VOCs) play a vital role in environmental monitoring. Although much progress has been made to develop new sensing materials, it remains challenging to detect a particular VOC selectively and without the interference of humidity. Herein, we report the effect of In2O3 nanoparticles on the VOC-sensing performance of ZnO twin-rods. The VOC-sensing tests were carried out in dry air and at a relative humidity (RH) of 26, 59, and 98%. The results indicated that the In2O3/ZnO heterostructure exhibited an improved sensing performance to triethylamine (TEA) compared to ZnO. In dry air, the responses to 100 ppm of TEA at 350 °C were 60.2 for the In2O3/ZnO heterostructure and 39.2 for pure ZnO. In2O3/ZnO even exhibited a high response of 6.2 to 1 ppm of TEA. Moreover, In2O3/ZnO exhibited a response to TEA up to 46.2 times higher than those of the other VOCs, indicating excellent selectivity. At 98% RH, the In2O3/ZnO heterostructure still had a high sensitivity to TEA, showing a response of 21.2 to 100 ppm of TEA with a response time of 1 s. The improved TEA-sensing performance of the In2O3/ZnO heterostructure can be attributed to the formation of the n-n heterojunction.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Laboratory of Materials for Sustainability (LabMatSus) Ibilce São Paulo State University (Unesp), R. Cristóvão Colombo, 2265Laboratory of Materials for Sustainability (LabMatSus) Ibilce São Paulo State University (Unesp), R. Cristóvão Colombo, 2265FAPESP: 2016/25267-8FAPESP: 2017/01267-1FAPESP: 2018/00033-0FAPESP: 2018/01258-5FAPESP: 2019/12345-9FAPESP: 2020/06421-1CNPq: 308327/2018-7Universidade Estadual Paulista (UNESP)Oliveira, Taís N.T. [UNESP]Perfecto, Tarcísio M. [UNESP]Zito, Cecilia A. [UNESP]Volanti, Diogo P. [UNESP]2022-04-28T19:47:55Z2022-04-28T19:47:55Z2021-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.snr.2021.100064Sensors and Actuators Reports, v. 3.2666-0539http://hdl.handle.net/11449/22299610.1016/j.snr.2021.1000642-s2.0-85120725289Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSensors and Actuators Reportsinfo:eu-repo/semantics/openAccess2022-04-28T19:47:55Zoai:repositorio.unesp.br:11449/222996Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T19:47:55Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunction |
title |
Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunction |
spellingShingle |
Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunction Oliveira, Taís N.T. [UNESP] Chemoresistive sensor Microwave-assisted hydrothermal N-n heterojunction Ultrasonic spray nozzle Volatile organic compounds |
title_short |
Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunction |
title_full |
Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunction |
title_fullStr |
Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunction |
title_full_unstemmed |
Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunction |
title_sort |
Improved triethylamine sensing properties by designing an In2O3/ZnO heterojunction |
author |
Oliveira, Taís N.T. [UNESP] |
author_facet |
Oliveira, Taís N.T. [UNESP] Perfecto, Tarcísio M. [UNESP] Zito, Cecilia A. [UNESP] Volanti, Diogo P. [UNESP] |
author_role |
author |
author2 |
Perfecto, Tarcísio M. [UNESP] Zito, Cecilia A. [UNESP] Volanti, Diogo P. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Oliveira, Taís N.T. [UNESP] Perfecto, Tarcísio M. [UNESP] Zito, Cecilia A. [UNESP] Volanti, Diogo P. [UNESP] |
dc.subject.por.fl_str_mv |
Chemoresistive sensor Microwave-assisted hydrothermal N-n heterojunction Ultrasonic spray nozzle Volatile organic compounds |
topic |
Chemoresistive sensor Microwave-assisted hydrothermal N-n heterojunction Ultrasonic spray nozzle Volatile organic compounds |
description |
Sensors of volatile organic compounds (VOCs) play a vital role in environmental monitoring. Although much progress has been made to develop new sensing materials, it remains challenging to detect a particular VOC selectively and without the interference of humidity. Herein, we report the effect of In2O3 nanoparticles on the VOC-sensing performance of ZnO twin-rods. The VOC-sensing tests were carried out in dry air and at a relative humidity (RH) of 26, 59, and 98%. The results indicated that the In2O3/ZnO heterostructure exhibited an improved sensing performance to triethylamine (TEA) compared to ZnO. In dry air, the responses to 100 ppm of TEA at 350 °C were 60.2 for the In2O3/ZnO heterostructure and 39.2 for pure ZnO. In2O3/ZnO even exhibited a high response of 6.2 to 1 ppm of TEA. Moreover, In2O3/ZnO exhibited a response to TEA up to 46.2 times higher than those of the other VOCs, indicating excellent selectivity. At 98% RH, the In2O3/ZnO heterostructure still had a high sensitivity to TEA, showing a response of 21.2 to 100 ppm of TEA with a response time of 1 s. The improved TEA-sensing performance of the In2O3/ZnO heterostructure can be attributed to the formation of the n-n heterojunction. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-11-01 2022-04-28T19:47:55Z 2022-04-28T19:47:55Z |
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.snr.2021.100064 Sensors and Actuators Reports, v. 3. 2666-0539 http://hdl.handle.net/11449/222996 10.1016/j.snr.2021.100064 2-s2.0-85120725289 |
url |
http://dx.doi.org/10.1016/j.snr.2021.100064 http://hdl.handle.net/11449/222996 |
identifier_str_mv |
Sensors and Actuators Reports, v. 3. 2666-0539 10.1016/j.snr.2021.100064 2-s2.0-85120725289 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Sensors and Actuators Reports |
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_ |
1803047240692924416 |