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MXene/WS2 hybrids for visible-light-activated NO2 sensing at room temperature
Yi Xia1,2, Sufang He1, Junming Wang1
1Research Center for Analysis and Measurement, Kunming University of Science and Technology, and Analytic & Testing Research Center of Yunnan, Kunming 650093, China.
Chemical Communications (Cambridge, England)
|September 9, 2021
Summary
This study presents a novel visible-light-activated optoelectronic sensor for nitrogen dioxide (NO2) detection at room temperature. The new 2D/2D T3C2Tx/WS2 nanocomposite sensor shows high performance and stability.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Sensing
Background:
- Optoelectronic gas sensors using 2D materials show promise for room-temperature NO2 detection.
- Existing sensors often rely on ultraviolet light and have limited performance.
Purpose of the Study:
- To develop a high-performance, room-temperature optoelectronic NO2 sensor activated by visible light.
- To investigate the sensing mechanism in 2D/2D T3C2Tx/WS2 nanocomposites.
Main Methods:
- Fabrication of 2D/2D T3C2Tx/WS2 nanocomposites.
- Characterization of the optoelectronic properties of the sensor.
- Testing NO2 sensing performance under visible light at room temperature.
Main Results:
- The T3C2Tx/WS2 sensor demonstrated a fast response/recovery rate, full reversibility, and long stability.
- Achieved a low detection limit of 10 ppb for NO2.
- Visible-light activation significantly improved optoelectronic sensing performance.
Conclusions:
- Visible-light activation of 2D/2D T3C2Tx/WS2 nanocomposites offers a promising approach for high-performance room-temperature NO2 sensing.
- Efficient interfacial charge separation in heterostructures enhances sensor capabilities.
- This work paves the way for advanced 2D nanomaterial-based gas sensors.
