Recent developments in 2D MXene-based materials for next generation room temperature NO₂ gas sensors

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Sensing

Background:

• MXenes possess unique structures, excellent electrical conductivity, and abundant functional groups, making them suitable for gas sensor fabrication.
• MXene-based gas sensors can operate at room temperature due to surface-dominant sensing mechanisms.
• Significant research has focused on MXene-based room temperature gas sensors for potential NO2 sensing applications.

Purpose of the Study:

• To review recent advancements in pure MXenes and their nanocomposites for NO2 gas sensing.
• To explore the sensing mechanisms of MXenes for NO2 detection.
• To investigate methods for enhancing MXene sensing performance, including nanocomposite formation.

Main Methods:

• Review of recent literature on MXene-based NO2 gas sensors.
• Analysis of sensing mechanisms in pure MXenes and their hybrids.
• Investigation of nanocomposite strategies (metal oxides, polymers, 2D materials) for performance tuning.

Main Results:

• MXenes and their nanocomposites demonstrate significant potential for NO2 gas sensing at room temperature.
• Formation of nanocomposites with various materials can effectively tune MXene sensing performance.
• Comparative analysis highlights the performance of different MXene-based materials for NO2 detection.

Conclusions:

• MXene-based materials are promising candidates for high-performance room temperature NO2 gas sensors.
• Further research into material design and understanding challenges is crucial for future advancements.
• Nanocomposite strategies offer a viable route to optimize MXene sensor performance.