MXenes公司
材料科学
丙酮
检出限
水蒸气
分析化学(期刊)
化学气相沉积
纳米技术
化学工程
化学
色谱法
有机化学
工程类
作者
Sanjit Manohar Majhi,Ashraf Ali,Yaser E. Greish,H.F. El-Maghraby,Naser Qamhieh,Abdul Razack Hajamohideen,Saleh T. Mahmoud
出处
期刊:ACS applied electronic materials
[American Chemical Society]
日期:2022-07-26
卷期号:4 (8): 4094-4103
被引量:29
标识
DOI:10.1021/acsaelm.2c00717
摘要
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 Ti3C2Tx MXene 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.
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