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6935949 
Journal Article 
Study on Sandwich Structure Toluene Sensor Based on LaFe1-xPdxO3 Nanofibers 
Hu Ming-Jiang; Liu Hai-Yan; Lyu Chun-Wang; Zhao Li-Xia; Zhang Zhi-Yuan; , 
2020 
Yes 
Chinese Journal of Analytical Chemistry / Fen Xi Hua Xue
ISSN: 0253-3820 
SCIENCE PRESS 
BEIJING 
66-73 
WOS:000512954800010 
A new sandwich structure toluene gas sensor was designed by transferring LaFe1-xPdxO3 nanofiber that was prepared by electrospinning method onto silicon substrate with platinum-inter digital electrodes by dip-coating method. The crystalline phase and microstructure of LaFe1-xPdxO3 nanofibers were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Sensitive mechanism and electrochemical characteristic of LaFe1-xPdxO3 nanofibers were analyzed by X-ray photoelectron spectroscopy (XPS). These characteristic tests for the toluene gas sensor were carried out to obtain the optimal sensitive performance, temperature, relative humidity, dynamic response, selectivity and stability. The result showed that the toluene gas sensor based on LaFe0.9Pd0.1O3 nanofiber had a good linear relationship with toluene in the concentration range of 1. 0-30 mu g/m(3) at operating temperature of 200 degrees C. The dynamic response time and recover time of sensor to 30 mu g/m(3) toluene were 3. 8 and 1. 8 s, respectively. This kind of sensor showed good anti-disturbance to such gases as benzene, xylene, ethanol, formaldehyde and acetone. Besides, the toluene gas sensor response was attenuated only about 0. 3, when it was applied continually on automobile about 50 days.