首页| Highly stable, fast responsive Mo2CT_x MXene sensors for room temperature carbon dioxide detection
Highly stable, fast responsive Mo2CT_x MXene sensors for room temperature carbon dioxide detection
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MXenes are the emerging class of 2D materials with numerous applications such as in energy storage, biomedical, catalysis, gas sensing, etc. Among these, the gas sensing application of MXene materials is gaining attention due to their higher sensitivity towards various gases but is least explored. Herein we report the fabrication of highly sensitive CO2 gas sensors using a porous silicon/Mo2CT_x hybrid system. The structure of the Mo-In-C non-MAX phase and formation of Mo2CT_x MXene were studied using X-ray diffraction. The elemental characterization through XPS and EDS confirms the presence of the functional groups and the deposition of the Mo2CT_x MXene films. The uniform deposition of the layered sheet-like 2D Mo2CT_x on the substrates was identified using the FESEM images. The sensor is found functional from room temperature to high-temperature conditions (30-250 °C). On the normal humid condition of 30% RH, the gas sensing response of the fabricated sensor is almost double in comparison with the crystalline silicon/Mo2CT_x sensor at 250 °C. The introduction of humidity leads to further enhancement of the sensing response from 25% to 32%. Moreover, the fabricated sensor presents a good sensing response at room temperature (30 °C) for a CO2 concentration of 50 ppm along with a fast response and recovery times of 32 and 45 s with a high degree of stability.
Carbon-dioxide sensorMXenesRoom temperature sensorPorous silicon
Tijin Thomas、Jesus Alberto Ramos Ramon、V. Agarwal
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Facultad de Ciencias Quimicas, Universidad Autonoma de Nuevo Leon, Av. Universidad, Cd Universitaria, San Nicolas de los Garza, Nuevo Leon, 66455, Mexico
Centro de Investigacion en Ingeniena y Ciencias Aplicadas, Universidad Autonoma del Estado de Morelos, Av. Universidad 1001, Colonia Chamilpa, Cuernavaca Mor, 62209, Mexico
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