MXenes公司
材料科学
氧化剂
堆积
选择性
肿胀 的
氮化物
光电子学
纳米技术
化学工程
图层(电子)
化学
复合材料
有机化学
催化作用
工程类
生物化学
作者
Yajie Zhang,Yi Li,Yadong Jiang,Zaihua Duan,Zhen Yuan,Bohao Liu,Qi Huang,Qiuni Zhao,Yajie Yang,Huiling Tai
标识
DOI:10.1016/j.snb.2024.135788
摘要
Transition metal carbides/nitrides (MXenes) have shown great potential in room temperature (RT) gas sensors, but the self-stacking of MXene sheets limits their sensitivity and response/recovery speed. In addition, the poor selectivity of MXenes sensors caused by the conventional single sensing mechanism remains a challenge. Herein, a synergistic effect of charge transfer and interlayer swelling is proposed to comprehensively improve the gas sensing performance of the MXenes toward oxidizing NO2. To this end, a resistive gas sensor is prepared by combining the accordion-like V2CTx MXene and n-type SnS2 nanoplates. The results reveal that the NO2 sensitivity of the V2CTx/SnS2 sensor is enhanced by 581.6 times compared to the pristine V2CTx sensor, while achieving ultrafast response and recovery speeds (4.8/4.7 s) at 25 °C under 51.9 % relative humidity. Furthermore, the V2CTx/SnS2 sensor exhibits excellent selectivity (response ratio > 5) to NO2. The outstanding gas sensing performances can be attributed to the synergistic sensing of charge transfer and interlayer swelling, unique structure and more active sites. This work expands the gas sensing application of the V2CTx MXene and promotes the in-depth combination of multiple sensing mechanisms, opening an effective avenue for developing high-performance RT NO2 sensors.
科研通智能强力驱动
Strongly Powered by AbleSci AI