A fast response cataluminescence ether gas sensor based on GO/Mo₂TiC₂T at low working temperature

Area of Science:

• Materials Science
• Chemical Sensing
• Nanotechnology

Background:

• Development of selective and sensitive gas sensors is crucial for environmental monitoring and safety.
• Existing sensors often require high operating temperatures, limiting their practical applicability.
• Graphene oxide (GO) and MXene materials offer unique properties for sensor development.

Purpose of the Study:

• To develop a novel cataluminescence (CTL) based gas sensor for ether detection.
• To investigate the sensing performance, including selectivity, sensitivity, and response/recovery times.
• To evaluate the sensor's operational stability and detection limit.

Main Methods:

• Fabrication of a composite material using graphene oxide (GO) and Mo2TiC2Tx (MXene).
• Characterization of the GO/Mo2TiC2Tx composite for gas sensing applications.
• Evaluation of the sensor's cataluminescence response to ether and other volatile organic compounds (VOCs).

Main Results:

• The GO/Mo2TiC2Tx composite sensor exhibited high sensitivity and selectivity towards ether.
• Optimal operating temperature was found to be low (155 °C) with rapid response (2 s) and recovery (8 s) times.
• A wide linear range (9.5-950 ppm) and a low detection limit (0.64 ppm) were achieved, with excellent selectivity against 10 common VOCs.

Conclusions:

• The developed GO/Mo2TiC2Tx composite sensor is a promising candidate for highly selective and sensitive ether gas detection.
• The sensor's low operating temperature, fast response, and long-term stability enhance its potential for practical applications.
• This work highlights the synergistic effects of GO and Mo2TiC2Tx in creating advanced gas sensing materials.