High sensitive and selective acetone gas sensor using molecular imprinting technique based on Ag-LaFeO_3

摘要

A new acetone gas sensor was developed using molecular imprinting technique (MIT) in semiconductor oxide to recognize small organic molecules. The molecular imprinting nanoparticles (MINs) were characterized by X-ray diffraction (XRD), and transmission electron microscopy (TEM), respectively. The experimental results indicate that the sensors based on the molecular imprinting technique (MIT) show excellent gas sensing properties to acetone vapor, and the properties of the sensor with x = 5:100 (x=acetone: N,N'-Methylenebisacrylamide, molar ratio) are the best. At the optimal operating temperature of 200 ℃, the response of the sensor (x =5:100) to 2.5 ppm acetone is 14.7, the response and recovery times are 80 s and 35 s, respectively.