Two-Dimensional Bimetallic Phthalocyanine Covalent-Organic-Framework-Based Chemiresistive Gas Sensor for ppb-Level NO<sub>2</sub> Detection
Two-dimensional (2D) phthalocyanine-based covalent organic frameworks (COFs) provide an ideal platform for efficient and rapid gas sensing—this can be attributed to their regular structure, moderate conductivity, and a large number of scalable metal active centers. However, there remains a need to e...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/10/1660 |
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| author | Xiyu Chen Min Zeng Jianhua Yang Nantao Hu Xiaoyong Duan Wei Cai Yanjie Su Zhi Yang |
| author_facet | Xiyu Chen Min Zeng Jianhua Yang Nantao Hu Xiaoyong Duan Wei Cai Yanjie Su Zhi Yang |
| author_sort | Xiyu Chen |
| collection | DOAJ |
| description | Two-dimensional (2D) phthalocyanine-based covalent organic frameworks (COFs) provide an ideal platform for efficient and rapid gas sensing—this can be attributed to their regular structure, moderate conductivity, and a large number of scalable metal active centers. However, there remains a need to explore structural modification strategies for optimizing the sluggish desorption process caused by the extensive porosity and strong adsorption effect of metal sites. Herein, we reported a 2D bimetallic phthalocyanine-based COF (COF-CuNiPc) as chemiresistive gas sensors that exhibited a high gas-sensing performance to nitrogen dioxide (NO<sub>2</sub>). Bimetallic COF-CuNiPc with an asymmetric synergistic effect achieves a fast adsorption/desorption process to NO<sub>2</sub>. It is demonstrated that the COF-CuNiPc can detect 50 ppb NO<sub>2</sub> with a recovery time of 7 s assisted by ultraviolet illumination. Compared with single-metal phthalocyanine-based COFs (COF-CuPc and COF-NiPc), the bimetallic structure of COF-CuNiPc can provide a proper band gap to interact with NO<sub>2</sub> gas molecules. The CuNiPc heterometallic active site expands the overlap of <i>d</i>-orbitals, and the optimized electronic arrangement accelerates the adsorption/desorption processes. The concept of a synergistic effect enabled by bimetallic phthalocyanines in this work can provide an innovative direction to design high-performance chemiresistive gas sensors. |
| first_indexed | 2024-03-11T03:26:02Z |
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| id | doaj.art-02b4c9195e1e49d9bae5c4608e234b5f |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T03:26:02Z |
| publishDate | 2023-05-01 |
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| series | Nanomaterials |
| spelling | doaj.art-02b4c9195e1e49d9bae5c4608e234b5f2023-11-18T02:42:53ZengMDPI AGNanomaterials2079-49912023-05-011310166010.3390/nano13101660Two-Dimensional Bimetallic Phthalocyanine Covalent-Organic-Framework-Based Chemiresistive Gas Sensor for ppb-Level NO<sub>2</sub> DetectionXiyu Chen0Min Zeng1Jianhua Yang2Nantao Hu3Xiaoyong Duan4Wei Cai5Yanjie Su6Zhi Yang7Key Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronic 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 Electronic 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 Electronic 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 Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaZhoushan Field Scientific Observation and Research Station for Marine Geo-Hazards, China Geological Survey, Qingdao 266237, ChinaDepartment of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaKey Laboratory of Thin Film and Microfabrication (Ministry of Education), Department of Micro/Nano Electronics, School of Electronic 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 Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaTwo-dimensional (2D) phthalocyanine-based covalent organic frameworks (COFs) provide an ideal platform for efficient and rapid gas sensing—this can be attributed to their regular structure, moderate conductivity, and a large number of scalable metal active centers. However, there remains a need to explore structural modification strategies for optimizing the sluggish desorption process caused by the extensive porosity and strong adsorption effect of metal sites. Herein, we reported a 2D bimetallic phthalocyanine-based COF (COF-CuNiPc) as chemiresistive gas sensors that exhibited a high gas-sensing performance to nitrogen dioxide (NO<sub>2</sub>). Bimetallic COF-CuNiPc with an asymmetric synergistic effect achieves a fast adsorption/desorption process to NO<sub>2</sub>. It is demonstrated that the COF-CuNiPc can detect 50 ppb NO<sub>2</sub> with a recovery time of 7 s assisted by ultraviolet illumination. Compared with single-metal phthalocyanine-based COFs (COF-CuPc and COF-NiPc), the bimetallic structure of COF-CuNiPc can provide a proper band gap to interact with NO<sub>2</sub> gas molecules. The CuNiPc heterometallic active site expands the overlap of <i>d</i>-orbitals, and the optimized electronic arrangement accelerates the adsorption/desorption processes. The concept of a synergistic effect enabled by bimetallic phthalocyanines in this work can provide an innovative direction to design high-performance chemiresistive gas sensors.https://www.mdpi.com/2079-4991/13/10/1660gas sensorcovalent organic frameworkbimetallicchemiresistivephthalocyanine |
| spellingShingle | Xiyu Chen Min Zeng Jianhua Yang Nantao Hu Xiaoyong Duan Wei Cai Yanjie Su Zhi Yang Two-Dimensional Bimetallic Phthalocyanine Covalent-Organic-Framework-Based Chemiresistive Gas Sensor for ppb-Level NO<sub>2</sub> Detection Nanomaterials gas sensor covalent organic framework bimetallic chemiresistive phthalocyanine |
| title | Two-Dimensional Bimetallic Phthalocyanine Covalent-Organic-Framework-Based Chemiresistive Gas Sensor for ppb-Level NO<sub>2</sub> Detection |
| title_full | Two-Dimensional Bimetallic Phthalocyanine Covalent-Organic-Framework-Based Chemiresistive Gas Sensor for ppb-Level NO<sub>2</sub> Detection |
| title_fullStr | Two-Dimensional Bimetallic Phthalocyanine Covalent-Organic-Framework-Based Chemiresistive Gas Sensor for ppb-Level NO<sub>2</sub> Detection |
| title_full_unstemmed | Two-Dimensional Bimetallic Phthalocyanine Covalent-Organic-Framework-Based Chemiresistive Gas Sensor for ppb-Level NO<sub>2</sub> Detection |
| title_short | Two-Dimensional Bimetallic Phthalocyanine Covalent-Organic-Framework-Based Chemiresistive Gas Sensor for ppb-Level NO<sub>2</sub> Detection |
| title_sort | two dimensional bimetallic phthalocyanine covalent organic framework based chemiresistive gas sensor for ppb level no sub 2 sub detection |
| topic | gas sensor covalent organic framework bimetallic chemiresistive phthalocyanine |
| url | https://www.mdpi.com/2079-4991/13/10/1660 |
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