Porous ZnO/rGO Nanosheet‐Based NO2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature
Abstract High‐performance gas sensors are highly desirable for environmental monitoring, clinical medicine, and industrial production. Herein, a gas sensor with excellent sensing response at room temperature is presented based on zinc oxide/reduced graphene oxide (ZnO/rGO) composites. The ZnO/rGO co...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2021-12-01
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| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202101511 |
| _version_ | 1797763902073733120 |
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| author | Ziwei Chen Haojie Guo Fusheng Zhang Xiaowen Li Jiabing Yu Xianping Chen |
| author_facet | Ziwei Chen Haojie Guo Fusheng Zhang Xiaowen Li Jiabing Yu Xianping Chen |
| author_sort | Ziwei Chen |
| collection | DOAJ |
| description | Abstract High‐performance gas sensors are highly desirable for environmental monitoring, clinical medicine, and industrial production. Herein, a gas sensor with excellent sensing response at room temperature is presented based on zinc oxide/reduced graphene oxide (ZnO/rGO) composites. The ZnO/rGO composites with various contents of rGO and the pure ZnO are successfully fabricated by a facile hydrothermal method. Particularly, the ZnO/rGO sensor with 1.5 mL of the rGO exhibits highest sensing response in a wide range from 5 ppb to 10 ppm NO2 concentration and its response arrives at 13.46 when exposed to 2 ppm NO2 at room temperature. Furthermore, ZnO/rGO sensors show short response time (2 ppm, 26 s) and recovery time (2 ppm, 164 s) at room temperature. The proposed ZnO/rGO sensors present high sensitivity, excellent reproducibility, and stability. In addition, the density functional theory (DFT) calculations show that the increased electrical conductivity under exposure of NO2 gas are attributed to the numerous reactive sites and carrier mobility of rGO. These results demonstrate that ZnO/rGO gas sensor has huge potential for applications in industrial and environmental monitoring. |
| first_indexed | 2024-03-12T19:48:02Z |
| format | Article |
| id | doaj.art-4224e506d8654ed9a939d290b362fb5d |
| institution | Directory Open Access Journal |
| issn | 2196-7350 |
| language | English |
| last_indexed | 2024-03-12T19:48:02Z |
| publishDate | 2021-12-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj.art-4224e506d8654ed9a939d290b362fb5d2023-08-02T03:24:30ZengWiley-VCHAdvanced Materials Interfaces2196-73502021-12-01824n/an/a10.1002/admi.202101511Porous ZnO/rGO Nanosheet‐Based NO2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room TemperatureZiwei Chen0Haojie Guo1Fusheng Zhang2Xiaowen Li3Jiabing Yu4Xianping Chen5Key Laboratory of Optoelectronic Technology and Systems Education Ministry of China Chongqing University and College of Optoelectronic Engineering State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 ChinaKey Laboratory of Optoelectronic Technology and Systems Education Ministry of China Chongqing University and College of Optoelectronic Engineering State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 ChinaKey Laboratory of Optoelectronic Technology and Systems Education Ministry of China Chongqing University and College of Optoelectronic Engineering State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 ChinaKey Laboratory of Optoelectronic Technology and Systems Education Ministry of China Chongqing University and College of Optoelectronic Engineering State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 ChinaKey Laboratory of Optoelectronic Technology and Systems Education Ministry of China Chongqing University and College of Optoelectronic Engineering State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 ChinaKey Laboratory of Optoelectronic Technology and Systems Education Ministry of China Chongqing University and College of Optoelectronic Engineering State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 ChinaAbstract High‐performance gas sensors are highly desirable for environmental monitoring, clinical medicine, and industrial production. Herein, a gas sensor with excellent sensing response at room temperature is presented based on zinc oxide/reduced graphene oxide (ZnO/rGO) composites. The ZnO/rGO composites with various contents of rGO and the pure ZnO are successfully fabricated by a facile hydrothermal method. Particularly, the ZnO/rGO sensor with 1.5 mL of the rGO exhibits highest sensing response in a wide range from 5 ppb to 10 ppm NO2 concentration and its response arrives at 13.46 when exposed to 2 ppm NO2 at room temperature. Furthermore, ZnO/rGO sensors show short response time (2 ppm, 26 s) and recovery time (2 ppm, 164 s) at room temperature. The proposed ZnO/rGO sensors present high sensitivity, excellent reproducibility, and stability. In addition, the density functional theory (DFT) calculations show that the increased electrical conductivity under exposure of NO2 gas are attributed to the numerous reactive sites and carrier mobility of rGO. These results demonstrate that ZnO/rGO gas sensor has huge potential for applications in industrial and environmental monitoring.https://doi.org/10.1002/admi.202101511NO 2 sensingporous ZnOreduced graphene oxideroom temperature |
| spellingShingle | Ziwei Chen Haojie Guo Fusheng Zhang Xiaowen Li Jiabing Yu Xianping Chen Porous ZnO/rGO Nanosheet‐Based NO2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature Advanced Materials Interfaces NO 2 sensing porous ZnO reduced graphene oxide room temperature |
| title | Porous ZnO/rGO Nanosheet‐Based NO2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature |
| title_full | Porous ZnO/rGO Nanosheet‐Based NO2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature |
| title_fullStr | Porous ZnO/rGO Nanosheet‐Based NO2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature |
| title_full_unstemmed | Porous ZnO/rGO Nanosheet‐Based NO2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature |
| title_short | Porous ZnO/rGO Nanosheet‐Based NO2 Gas Sensor with High Sensitivity and ppb‐Level Detection Limit at Room Temperature |
| title_sort | porous zno rgo nanosheet based no2 gas sensor with high sensitivity and ppb level detection limit at room temperature |
| topic | NO 2 sensing porous ZnO reduced graphene oxide room temperature |
| url | https://doi.org/10.1002/admi.202101511 |
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