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Comparative study on the gas-sensing performance of ZnO/SnO2 external and ZnO–SnO2 internal heterojunctions for ppb H2S and NO2 gases detection

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Bibliographic Details
Main Author: Phan, Hong Phuoc
Other Authors: Nguyen, Ngoc Viet
Format: Article
Language:English
Published: Sensors and Actuators B: Chemical 2021
Subjects:
ZnO/SnO2
Composite nanofibers
Mixed nanofibers
Nano-junction
Online Access:https://www.sciencedirect.com/science/article/abs/pii/S092540052100174X?via%3Dihub
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1927
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spelling oai:localhost:PNK-19272022-08-17T05:54:44Z Comparative study on the gas-sensing performance of ZnO/SnO2 external and ZnO–SnO2 internal heterojunctions for ppb H2S and NO2 gases detection Phan, Hong Phuoc Nguyen, Ngoc Viet Le, Viet Thong Chu, Manh Hung Nguyen, Duc Hoa Nguyen, Van Duy Hoang, Si Hong Nguyen, Van Hieu ZnO/SnO2 Composite nanofibers Mixed nanofibers Nano-junction Q1 The design of hetero-nanojunctions can greatly amplify the gas-sensing performance of conventional metal oxide gas sensors. In this study, the composite nanofibers (NFs) of ZnO–SnO2 internal heterojunctions (HJs) and the mixed NFs of ZnO/SnO2 external HJs were realized by using the electrospinning technique. Then, the gas-sensing characteristics of the as-synthesized NFs toward H2S and NO2 gases were systematically investigated and compared. The effects of the internal and external nanojunctions of the hetero-NF-based gas sensors were also explored. Results showed that the ZnO–SnO2 composite NFs demonstrate a higher response than those of the ZnO/SnO2 mixed NFs, as well as bare ZnO and SnO2 NFs. Also, the cross responses of the hetero-NF sensors toward 200 ppm CO, 250 ppm H2, and 250 ppm NH3 were examined. The gas-sensing mechanism of the internal and external HJs of composite ZnO/SnO2 and mixed ZnO/SnO2 NFs was analyzed. The remarkable enhanced gas-sensing performance of hetero-NFs was mainly attributed to the formation of internal HJs. 2021-07-05T05:06:03Z 2021-07-05T05:06:03Z 2021 Article https://www.sciencedirect.com/science/article/abs/pii/S092540052100174X?via%3Dihub https://dlib.phenikaa-uni.edu.vn/handle/PNK/1927 10.1016/j.snb.2021.129606 en application/pdf Sensors and Actuators B: Chemical
institution Digital Phenikaa
collection Digital Phenikaa
language English
topic ZnO/SnO2
Composite nanofibers
Mixed nanofibers
Nano-junction
spellingShingle ZnO/SnO2
Composite nanofibers
Mixed nanofibers
Nano-junction
Phan, Hong Phuoc
Comparative study on the gas-sensing performance of ZnO/SnO2 external and ZnO–SnO2 internal heterojunctions for ppb H2S and NO2 gases detection
description Q1
author2 Nguyen, Ngoc Viet
author_facet Nguyen, Ngoc Viet
Phan, Hong Phuoc
format Article
author Phan, Hong Phuoc
author_sort Phan, Hong Phuoc
title Comparative study on the gas-sensing performance of ZnO/SnO2 external and ZnO–SnO2 internal heterojunctions for ppb H2S and NO2 gases detection
title_short Comparative study on the gas-sensing performance of ZnO/SnO2 external and ZnO–SnO2 internal heterojunctions for ppb H2S and NO2 gases detection
title_full Comparative study on the gas-sensing performance of ZnO/SnO2 external and ZnO–SnO2 internal heterojunctions for ppb H2S and NO2 gases detection
title_fullStr Comparative study on the gas-sensing performance of ZnO/SnO2 external and ZnO–SnO2 internal heterojunctions for ppb H2S and NO2 gases detection
title_full_unstemmed Comparative study on the gas-sensing performance of ZnO/SnO2 external and ZnO–SnO2 internal heterojunctions for ppb H2S and NO2 gases detection
title_sort comparative study on the gas-sensing performance of zno/sno2 external and zno–sno2 internal heterojunctions for ppb h2s and no2 gases detection
publisher Sensors and Actuators B: Chemical
publishDate 2021
url https://www.sciencedirect.com/science/article/abs/pii/S092540052100174X?via%3Dihub
https://dlib.phenikaa-uni.edu.vn/handle/PNK/1927
_version_ 1751856297366519808
score 8.891787

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