Xu Qikun, Zong Boyang, Li Qiuju, Fang Xian, Mao Shun, Ostrikov Kostya Ken
College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China.
College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, China.
J Hazard Mater. 2022 Feb 15;424(Pt B):127492. doi: 10.1016/j.jhazmat.2021.127492. Epub 2021 Oct 12.
Despite the critical need to monitor HS, a hazardous gas, in environmental and medical settings, there are currently no reliable methods for rapid and sufficiently discriminative HS detection in real-world humid environments. Herein, targeted hybridizing of TiCT MXene with Ag nanoparticles on a field-effect transistor (FET) platform has led to a step change in MXene sensing performance down to ppb levels, and enabled the very high selectivity and fast response/recovery time under room temperature for HS detection in humid conditions. For the first time, we present a novel relative humidity (RH) self-calibration strategy for the accurate detection of HS. This strategy can eliminate the influence of humidity and enables the accurate quantitative detection of gas in the total RH range. We further elucidate that the superior HS sensing performance is attributed to the electron and chemical sensitization effects. This study opens new avenues for the development of high-performance MXene-based sensors and offers a viable approach for addressing real-world humidity effect for gas sensors generally.
尽管在环境和医疗环境中监测有害气体硫化氢（HS）至关重要，但目前尚无可靠方法在实际潮湿环境中对HS进行快速且具有充分区分性的检测。在此，在场效应晶体管（FET）平台上，将TiCT MXene与银纳米颗粒进行靶向杂交，使MXene传感性能实现了跃变，达到了十亿分之一（ppb）级别，并且在室温下实现了在潮湿条件下检测HS时极高的选择性和快速的响应/恢复时间。我们首次提出了一种用于准确检测HS的新型相对湿度（RH）自校准策略。该策略可消除湿度影响，并能在整个RH范围内对气体进行准确的定量检测。我们进一步阐明，卓越的HS传感性能归因于电子和化学敏化效应。这项研究为高性能基于MXene的传感器的开发开辟了新途径，并为总体上解决气体传感器在实际应用中的湿度影响问题提供了可行方法。
