High-Performance H<sub>2</sub>S Sensors to Detect SF<sub>6</sub> Leakage
Detecting H<sub>2</sub>S in oxygen-deficient conditions is vital for identifying leaks in SF<sub>6</sub>-insulated electrical equipment. Current infrared-based detection methods are expensive and sensitive to environmental conditions, highlighting the necessity for cost-effective and stable gas sensors. Existing gas sensors based on semiconducting metal oxides (SMOXs) are limited by redox reactions with oxygen and require high operating temperatures. Here, we introduce a room-temperature (RT) H<sub>2</sub>S sensor for oxygen-deficient environments using the intrinsic conducting two-dimensional (2D) metal-organic framework (MOF), Co<sub>1.8</sub>Ni<sub>1.2</sub>(hexaiminotriphenylene)<sub>2</sub> [Co<sub>1.8</sub>Ni<sub>1.2</sub>(HITP)<sub>2</sub>], overcoming the limitations of SMOX gas sensors. Remarkably, Co<sub>1.8</sub>Ni<sub>1.2</sub>(HITP)<sub>2</sub> sensors exhibit exceptional selectivity for H<sub>2</sub>S with negligible cross-responses and a sensitivity drift of less than 4.13% in an SF<sub>6</sub> atmosphere over 60 days. The Co<sub>1.8</sub>Ni<sub>1.2</sub>(HITP)<sub>2</sub> gas sensor shows significant promise for real-time and stable monitoring of H<sub>2</sub>S gas in oxygen-deficient environments.
Authors
- J. Paul Attfield (ORCID: https://orcid.org/0000-0001-9763-3987)
- Zhihang Xu (ORCID: https://orcid.org/0000-0001-9674-3439)
- Ye Zhu (ORCID: https://orcid.org/0000-0002-5217-493X)
- Huashuai Hu (ORCID: https://orcid.org/0009-0008-1738-0878)
- Xiaohui Yan (ORCID: https://orcid.org/0000-0001-8425-5032)
- Minghui Yang (ORCID: https://orcid.org/0000-0003-1071-1327)
- Zhaorui Zhang (ORCID: https://orcid.org/0000-0003-0913-1886)
- Shan Jiang (ORCID: https://orcid.org/0000-0002-7103-8909)
- Xuefei Zhao (ORCID: https://orcid.org/0000-0003-2314-1431)
Institutions
- Hong Kong Polytechnic University (HK)
- Liaoning Normal University (CN)
- Dalian University of Technology (CN)
- University of Edinburgh (GB)
Publication Details
- Journal
- ACS Sensors
- Published
- 2024-09-30
- DOI
- https://doi.org/10.1021/acssensors.4c01791
- Citations
- 7
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 1.46
Funders
- National Natural Science Foundation of China
- Engineering and Physical Sciences Research Council
- Project 211
- Fundamental Research Funds for the Central Universities