2D V₂C MXene Based Flexible Gas Sensor for Highly Selective and Sensitive Toluene Detection at Room Temperature

2D V₂C MXene Based Flexible Gas Sensor for Highly Selective and Sensitive Toluene Detection at Room Temperature

Karmakar, Sourav (Indian Institute of Information Technology Kalyani)
Deepak, Mavuri Sai (Indian Institute of Technology Hyderabad)
Nanda, Om Priya (Indian Institute of Technology Hyderabad)
Sett, A. (TU Delft Bio-Electronics)
Maity, Palash Chandra (Indian Institute of Science)
Karmakar, Gairik (Indian Institute of Technology Kharagpur)
Sha, Rinky (Indian Institute of Information Technology Kalyani)
Badhulika, Sushmee (Indian Institute of Technology Hyderabad)
Bhattacharyya, Tarun Kanti (Indian Institute of Technology Kharagpur)

2024

While the majority of the reports on toluene gas sensors are on rigid electrodes and based on composite materials, doping with additional noble metals, or a high temperature detection method, this work is the first demonstration of the vanadium carbide (V₂C) MXene based flexible and room-temperature (RT) toluene gas sensor. The V₂C MXene is synthesized by an HF etching route. The field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) images exhibit a typical accordion-like multilayered structure of the V₂C MXene, where the Fourier-transform infrared spectroscopy (FTIR), Raman, and X-ray photoelectron spectroscopy (XPS) data further ensured its successful growth. The V₂C (band gap of 3.9 eV) based flexible gas sensor employing a polyester substrate, displays good reproducibility, quick response/recovery time (14 s/34 s), long-term stability, good cross-selectivity, and a low detection limit of 47.85 ppb over the linear region of 5-200 ppm toluene at RT (27 ± 1 °C). The effect of relative humidity (RH) toward RT toluene gas sensing has also been investigated here. This sensor shows an excellent response of 775% at 200 ppm toluene, with brilliant selectivity toward toluene over six other hazardous gases. The sensor’s plentiful surface functional groups (−F, −OH, −O) and superior electrical characteristics are responsible for its enhanced performance. In light of this, the flexible and RT toluene gas sensor based on the V₂C MXene can be a smart way to fabricate the next-generation toluene gas sensors.

flexible
gas sensor
room-temperature
toluene
V2C MXene

http://resolver.tudelft.nl/uuid:ed6bf8b5-7424-4b4b-a1a9-92c519b887cb

https://doi.org/10.1021/acsaelm.4c00369

2024-11-08

ACS Applied Electronic Materials, 6 (5), 3717-3725

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2024 Sourav Karmakar, Mavuri Sai Deepak, Om Priya Nanda, A. Sett, Palash Chandra Maity, Gairik Karmakar, Rinky Sha, Sushmee Badhulika, Tarun Kanti Bhattacharyya