TY - JOUR
T1 - Accordion-like-Ti3C2MXene-Based Gas Sensors with Sub-ppm Level Detection of Acetone at Room Temperature
AU - Majhi, Sanjit Manohar
AU - Ali, Ashraf
AU - Greish, Yaser E.
AU - El-Maghraby, Hesham F.
AU - Qamhieh, Naser N.
AU - Hajamohideen, Abdul Razack
AU - Mahmoud, Saleh T.
N1 - Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/8/23
Y1 - 2022/8/23
N2 - Compared to traditional-metal oxide-based gas sensors (MOS), the progress of high-performance room-temperature (RT) gas-sensing materials has captivated a lot of interest in recent years. MXenes, two-dimensional (2D) transition-metal carbides/nitrides, have recently been discovered and gained tremendous consideration for gas sensing applications due to their superior chemical and physical properties. Herein, we successfully synthesized accordion-like Ti3C2TxMXene multilayers by a selective HF-etching method at 60 °C to be used as a chemiresistive sensor for acetone vapor. The fabricated sensor successfully detected acetone vapor at the parts per billion (ppb) level and showed a p-type sensing behavior. The limit of detection (LOD) of acetone vapor was about 250 ppb with a fast response time of 53 s. The sensor exhibited good repeatability, high selectivity toward acetone among other test gases, and excellent stability even after 4 months. The sensing mechanism was proposed in terms of the interaction between the charge carriers of accordion-like Ti3C2Tx, multiple hydrogen bonding between different functional groups on the MXene surface, and acetone vapor species. The prepared sensor also showed high sensitivity toward acetone vapor at RT (23 °C); hence, it lends itself high potential as a breath sensor for diabetic patients.
AB - Compared to traditional-metal oxide-based gas sensors (MOS), the progress of high-performance room-temperature (RT) gas-sensing materials has captivated a lot of interest in recent years. MXenes, two-dimensional (2D) transition-metal carbides/nitrides, have recently been discovered and gained tremendous consideration for gas sensing applications due to their superior chemical and physical properties. Herein, we successfully synthesized accordion-like Ti3C2TxMXene multilayers by a selective HF-etching method at 60 °C to be used as a chemiresistive sensor for acetone vapor. The fabricated sensor successfully detected acetone vapor at the parts per billion (ppb) level and showed a p-type sensing behavior. The limit of detection (LOD) of acetone vapor was about 250 ppb with a fast response time of 53 s. The sensor exhibited good repeatability, high selectivity toward acetone among other test gases, and excellent stability even after 4 months. The sensing mechanism was proposed in terms of the interaction between the charge carriers of accordion-like Ti3C2Tx, multiple hydrogen bonding between different functional groups on the MXene surface, and acetone vapor species. The prepared sensor also showed high sensitivity toward acetone vapor at RT (23 °C); hence, it lends itself high potential as a breath sensor for diabetic patients.
KW - 2D nanomaterials
KW - MXene
KW - TiCT
KW - acetone
KW - room-temperature gas sensor
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U2 - 10.1021/acsaelm.2c00717
DO - 10.1021/acsaelm.2c00717
M3 - Article
AN - SCOPUS:85136454717
SN - 2637-6113
VL - 4
SP - 4094
EP - 4103
JO - ACS Applied Electronic Materials
JF - ACS Applied Electronic Materials
IS - 8
ER -