Humidity-Insensitive NO2 Sensors Based on SnO2/rGO Composites
This study reported a novel humidity-insensitive nitrogen dioxide (NO2) gas sensor based on tin dioxide (SnO2)/reduced graphene oxide (rGO) composites through the sol-gel method. The sensor demonstrated ppb-level NO2 detection in p-type sensing behaviors (13.6% response to 750 ppb). Because of the s...
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Frontiers Media S.A.
2021-05-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2021.681313/full |
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| author | Yingyi Wang Yingyi Wang Lin Liu Fuqin Sun Fuqin Sun Tie Li Tie Li Ting Zhang Ting Zhang Sujie Qin |
| author_facet | Yingyi Wang Yingyi Wang Lin Liu Fuqin Sun Fuqin Sun Tie Li Tie Li Ting Zhang Ting Zhang Sujie Qin |
| author_sort | Yingyi Wang |
| collection | DOAJ |
| description | This study reported a novel humidity-insensitive nitrogen dioxide (NO2) gas sensor based on tin dioxide (SnO2)/reduced graphene oxide (rGO) composites through the sol-gel method. The sensor demonstrated ppb-level NO2 detection in p-type sensing behaviors (13.6% response to 750 ppb). Because of the synergistic effect on SnO2/rGO p-n heterojunction, the sensing performance was greatly enhanced compared to that of bare rGO. The limit of detection of sensors was as low as 6.7 ppb under dry air. Moreover, benefited from the formed superhydrophobic structure of the SnO2/rGO composites (contact angle: 149.0°), the humidity showed a negligible influence on the dynamic response (Sg) of the sensor to different concentration of NO2 when increasing the relative humidity (RH) from 0 to 70% at 116°C. The relative conductivity of the sensor to 83% relative humidity was 0.11%. In addition, the response ratio (Sg/SRH) between 750 ppb NO2 and 83% RH was 649.0, indicating the negligible impaction of high-level ambient humidity on the sensor. The as-fabricated humidity-insensitive gas sensor can promise NO2 detection in real-world applications such as safety alarm, chemical engineering, and so on. |
| first_indexed | 2024-12-17T22:20:10Z |
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| id | doaj.art-3c00caa7145e4b00ba5724dfd50b09da |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-17T22:20:10Z |
| publishDate | 2021-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-3c00caa7145e4b00ba5724dfd50b09da2022-12-21T21:30:30ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462021-05-01910.3389/fchem.2021.681313681313Humidity-Insensitive NO2 Sensors Based on SnO2/rGO CompositesYingyi Wang0Yingyi Wang1Lin Liu2Fuqin Sun3Fuqin Sun4Tie Li5Tie Li6Ting Zhang7Ting Zhang8Sujie Qin9Department of Health and Environmental Sciences, Xi’an Jiaotong-Liverpool University, Suzhou, ChinaI-Lab, Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, ChinaI-Lab, Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, ChinaI-Lab, Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, ChinaSchool of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, ChinaI-Lab, Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, ChinaSchool of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, ChinaI-Lab, Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, ChinaSchool of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, ChinaDepartment of Health and Environmental Sciences, Xi’an Jiaotong-Liverpool University, Suzhou, ChinaThis study reported a novel humidity-insensitive nitrogen dioxide (NO2) gas sensor based on tin dioxide (SnO2)/reduced graphene oxide (rGO) composites through the sol-gel method. The sensor demonstrated ppb-level NO2 detection in p-type sensing behaviors (13.6% response to 750 ppb). Because of the synergistic effect on SnO2/rGO p-n heterojunction, the sensing performance was greatly enhanced compared to that of bare rGO. The limit of detection of sensors was as low as 6.7 ppb under dry air. Moreover, benefited from the formed superhydrophobic structure of the SnO2/rGO composites (contact angle: 149.0°), the humidity showed a negligible influence on the dynamic response (Sg) of the sensor to different concentration of NO2 when increasing the relative humidity (RH) from 0 to 70% at 116°C. The relative conductivity of the sensor to 83% relative humidity was 0.11%. In addition, the response ratio (Sg/SRH) between 750 ppb NO2 and 83% RH was 649.0, indicating the negligible impaction of high-level ambient humidity on the sensor. The as-fabricated humidity-insensitive gas sensor can promise NO2 detection in real-world applications such as safety alarm, chemical engineering, and so on.https://www.frontiersin.org/articles/10.3389/fchem.2021.681313/fullgas sensorSnO2/rGO compositeshumidity-insensitivelow temperaturenitrogen dioxide (NO2) |
| spellingShingle | Yingyi Wang Yingyi Wang Lin Liu Fuqin Sun Fuqin Sun Tie Li Tie Li Ting Zhang Ting Zhang Sujie Qin Humidity-Insensitive NO2 Sensors Based on SnO2/rGO Composites Frontiers in Chemistry gas sensor SnO2/rGO composites humidity-insensitive low temperature nitrogen dioxide (NO2) |
| title | Humidity-Insensitive NO2 Sensors Based on SnO2/rGO Composites |
| title_full | Humidity-Insensitive NO2 Sensors Based on SnO2/rGO Composites |
| title_fullStr | Humidity-Insensitive NO2 Sensors Based on SnO2/rGO Composites |
| title_full_unstemmed | Humidity-Insensitive NO2 Sensors Based on SnO2/rGO Composites |
| title_short | Humidity-Insensitive NO2 Sensors Based on SnO2/rGO Composites |
| title_sort | humidity insensitive no2 sensors based on sno2 rgo composites |
| topic | gas sensor SnO2/rGO composites humidity-insensitive low temperature nitrogen dioxide (NO2) |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2021.681313/full |
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