Abstract
To address the challenge of achieving both high sensitivity and a high quality factor in quartz crystal microbalance(QCM)humidity sensors,a nanodiamond(ND)/Ti3C2 MXene composite-coated QCM humidity sensor was fabricated.The material characteristics of ND,Ti3C2 MXene,and ND/Ti3C2 MXene composite were analyzed by transmission electron microscopy(TEM)and Fourier trans-form infrared(FTIR)spectroscopy.The experimental results demonstrated that the hydrophilic ND nanoparticles coated on Ti3C2 MXene nanosheet prevented the self-stacking of Ti3C2 MXene and enhanced the sensitivity of Ti3C2 MXene-based QCM humidity sensor.Moreover,the high mechanical modulus of Ti3C2 MXene material helped ND/Ti3C2 MXene composite-coated QCM humidity sensor to achieve a high quality factor(＞20,000).ND/Ti3C2 MXene composite-coated QCM humidity sensor exhibited a sensitivity of 82.45 Hz/％RH,a humidity hysteresis of 1.1％RH,fast response/recovery times,acceptable repeatability,and good stability from 11.3％RH to 97.3％RH.The response mechanism of ND/Ti3C2 MXene composite-coated QCM humidity sensor was analyzed in combination with a bi-ex-ponential kinetic adsorption model.Finally,the potential application of ND/Ti3C2 MXene composite-coated QCM humidity sensor was demonstrated through its frequency response to wooden blocks with different moisture contents.
基金项目
国家自然科学基金(61401047)
中国博士后科学基金(2018M633349)
Oversea Students Funding Project of the Department of Human Resources and Social Security of Sichuan()
Scientific Research Foundation of CUIT(KYQN202210)
NETL
NSTL
万方数据