UV-Assisted Ammonia Sensing at Room Temperature Using GA<sub>2</sub>O<sub>3</sub>/TI<sub>3</sub>C<sub>2</sub>T<sub>x</sub> Mxene Composite
In this paper, the fabrication and evaluation of an ammonia gas sensor that is operated under room temperature and UV light. As we are well known, most gas sensors such as Ga<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>O<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>/Ti<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>T<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</inf> MXene composite have been found to be potential materials for room-temperature ammonia sensing. However, those composite material gas sensors have poor repeatability due to the long recovery time. To overcome drawbacks, we present the simplest way to solve this problem by using the LED UV light. The heterojunction formed by annealing the Ga<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>O<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>/Ti<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>T<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</inf> MXene composite not only shortens the recovery time by accelerating the photoinduced electron-hole pair migration under UV light, but also significantly improves the response to ammonia. These results visualize the commercialization of Ga<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>O<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>/Ti<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>C<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>T<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</inf> MXene composite sensors and expand the application of ammonia sensing technology in various environments.
Authors
- J.C.S. Woo
- Gichun Cha (ORCID: https://orcid.org/0000-0002-6327-8742)
- Jong Sung Park (ORCID: https://orcid.org/0000-0001-6638-4746)
- Dong-Su Kim (ORCID: https://orcid.org/0000-0001-5902-0581)
- Jong Wook Noh (ORCID: https://orcid.org/0000-0002-2255-1255)
Institutions
- Kyungpook National University (KR)
- Korea Institute of Industrial Technology (KR)
Publication Details
- Published
- 2025-06-29
- DOI
- https://doi.org/10.1109/transducers61432.2025.11109721
- Citations
- 1
- Primary Topic
- Gas Sensing Nanomaterials and Sensors
- Type
- article
- Field-Weighted Citation Impact
- 0.73