Conducting polymer-bridged three-dimensional heterojunctions of reduced graphene oxide/γ-Fe2O3 hybrids for high-performance NO2 gas sensing
Three-dimensional (3D) reduced graphene oxide (RGO) networks show potentials for highly sensitive gas sensors. However, many insulating materials are usually used during RGO assembly process, which inevitably hinder the electron transfer efficiency, and affect the gas sensing performance. In this wo...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-05-01
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| Series: | Results in Surfaces and Interfaces |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666845922000113 |
| _version_ | 1828553276325363712 |
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| author | Cheng Zou Jing Hu Yanjie Su Feng Shao Tian Tian Mingkui Zhu Nantao Hu Zhi Yang Yafei Zhang |
| author_facet | Cheng Zou Jing Hu Yanjie Su Feng Shao Tian Tian Mingkui Zhu Nantao Hu Zhi Yang Yafei Zhang |
| author_sort | Cheng Zou |
| collection | DOAJ |
| description | Three-dimensional (3D) reduced graphene oxide (RGO) networks show potentials for highly sensitive gas sensors. However, many insulating materials are usually used during RGO assembly process, which inevitably hinder the electron transfer efficiency, and affect the gas sensing performance. In this work, 3D structures based on nanospheres of conducting polymer layer-bridged γ-Fe2O3/RGO hybrids have been designed and demonstrated for NO2 sensing. Polyaniline (PANI), as a conducting polymer, can not only serve as self-assembly reagents to construct 3D hybrid structures, but also play an important role in participating electron transfer through forming p-n heterojunctions between interfaces of γ-Fe2O3 and RGO. The manufactured γ-Fe2O3@PANI@RGO sensors show a response as high as 911% when exposure to 50 ppm NO2, being over 124 times those of bare two-dimensional graphene sensors. In addition, excellent selectivity, stability, and low detectable concentration (100 ppb) to NO2 can be achieved for sensors based on this unique structure. It is suggested that the high performance can be ascribed to the formed 3D structures based on as-designed p-n heterojunctions and conjugation effect of PANI. The design strategy as well as constructed 3D RGO can provide a general route to fabricate high-performance gas sensors. |
| first_indexed | 2024-12-12T05:15:48Z |
| format | Article |
| id | doaj.art-1a371573febd4061bccdc6d6d6103a34 |
| institution | Directory Open Access Journal |
| issn | 2666-8459 |
| language | English |
| last_indexed | 2024-12-12T05:15:48Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Surfaces and Interfaces |
| spelling | doaj.art-1a371573febd4061bccdc6d6d6103a342022-12-22T00:36:47ZengElsevierResults in Surfaces and Interfaces2666-84592022-05-017100057Conducting polymer-bridged three-dimensional heterojunctions of reduced graphene oxide/γ-Fe2O3 hybrids for high-performance NO2 gas sensingCheng Zou0Jing Hu1Yanjie Su2Feng Shao3Tian Tian4Mingkui Zhu5Nantao Hu6Zhi Yang7Yafei Zhang8Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaResearch Center for Nanophotonic and Nanoelectronic Materials, School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, ChinaKey Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaKey Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaKey Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaKey Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaKey Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.Three-dimensional (3D) reduced graphene oxide (RGO) networks show potentials for highly sensitive gas sensors. However, many insulating materials are usually used during RGO assembly process, which inevitably hinder the electron transfer efficiency, and affect the gas sensing performance. In this work, 3D structures based on nanospheres of conducting polymer layer-bridged γ-Fe2O3/RGO hybrids have been designed and demonstrated for NO2 sensing. Polyaniline (PANI), as a conducting polymer, can not only serve as self-assembly reagents to construct 3D hybrid structures, but also play an important role in participating electron transfer through forming p-n heterojunctions between interfaces of γ-Fe2O3 and RGO. The manufactured γ-Fe2O3@PANI@RGO sensors show a response as high as 911% when exposure to 50 ppm NO2, being over 124 times those of bare two-dimensional graphene sensors. In addition, excellent selectivity, stability, and low detectable concentration (100 ppb) to NO2 can be achieved for sensors based on this unique structure. It is suggested that the high performance can be ascribed to the formed 3D structures based on as-designed p-n heterojunctions and conjugation effect of PANI. The design strategy as well as constructed 3D RGO can provide a general route to fabricate high-performance gas sensors.http://www.sciencedirect.com/science/article/pii/S2666845922000113Three-dimensional graphene hybridsPolyanilineCore–shell structureHeterojunctionsGas sensor |
| spellingShingle | Cheng Zou Jing Hu Yanjie Su Feng Shao Tian Tian Mingkui Zhu Nantao Hu Zhi Yang Yafei Zhang Conducting polymer-bridged three-dimensional heterojunctions of reduced graphene oxide/γ-Fe2O3 hybrids for high-performance NO2 gas sensing Results in Surfaces and Interfaces Three-dimensional graphene hybrids Polyaniline Core–shell structure Heterojunctions Gas sensor |
| title | Conducting polymer-bridged three-dimensional heterojunctions of reduced graphene oxide/γ-Fe2O3 hybrids for high-performance NO2 gas sensing |
| title_full | Conducting polymer-bridged three-dimensional heterojunctions of reduced graphene oxide/γ-Fe2O3 hybrids for high-performance NO2 gas sensing |
| title_fullStr | Conducting polymer-bridged three-dimensional heterojunctions of reduced graphene oxide/γ-Fe2O3 hybrids for high-performance NO2 gas sensing |
| title_full_unstemmed | Conducting polymer-bridged three-dimensional heterojunctions of reduced graphene oxide/γ-Fe2O3 hybrids for high-performance NO2 gas sensing |
| title_short | Conducting polymer-bridged three-dimensional heterojunctions of reduced graphene oxide/γ-Fe2O3 hybrids for high-performance NO2 gas sensing |
| title_sort | conducting polymer bridged three dimensional heterojunctions of reduced graphene oxide γ fe2o3 hybrids for high performance no2 gas sensing |
| topic | Three-dimensional graphene hybrids Polyaniline Core–shell structure Heterojunctions Gas sensor |
| url | http://www.sciencedirect.com/science/article/pii/S2666845922000113 |
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