Room-Temperature 2H-WSe<sub>2</sub>/rGO Composite-Based NO<sub>2</sub> Gas Sensor With Long-Term Stability
Herein, we present interdigitated microelectrode nitrogen dioxide (NO2) gas sensor by utilizing layered nanosheets of tungsten diselenide (2H-WSe2) intercalated with reduced graphene oxide (rGO). The 2H-WSe2 nanosheets and its composite with rGO were prepared through simple solvothermal process, resulting in intercalation with rGO sheets. Comprehensive investigation of gas-sensing properties of WSe2-rGO (WSR) composite nanosheets with their high selectivity and sensitivity to NO2 detection at ambient temperature have been performed. The WSR sensor achieved notable responses of ~2.9%, ~25.9%, and ~39% at NO2 concentrations of 50 ppb, 1 ppm, and 4 ppm, respectively. Furthermore, the sensor efficiently maintained good response of ~30.8% to NO2 gas even after 210 days of testing, demonstrating its outstanding long-term stability.
Authors
- Mohammed Saquib Khan (ORCID: https://orcid.org/0000-0002-1418-1549)
- K. Sachdev (ORCID: https://orcid.org/0000-0002-1942-2452)
- Sanjay Kumar (ORCID: https://orcid.org/0000-0001-5382-2006)
- Deependra Jhankal (ORCID: https://orcid.org/0000-0002-6008-4424)
- Preeti Shakya
- Nisha Verma
Institutions
- Indian Institute of Technology Dhanbad (IN)
- Malaviya National Institute of Technology Jaipur (IN)
- Gyan Vihar University (IN)
- Indian Institute of Technology Kanpur (IN)
Publication Details
- Journal
- IEEE Sensors Journal
- Published
- 2025-03-29
- DOI
- https://doi.org/10.1109/jsen.2025.3553920
- Citations
- 3
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 2.19