Citation: HU Ming-Jiang, LIU Hai-Yan, LYU Chun-Wang, ZHAO Li-Xia, ZHANG Zhi-Yuan. Study on Sandwich Structure Toluene Sensor Based on LaFe_1-xPd_xO₃ Nanofibers[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(1): 66-73. doi: 10.19756/j.issn.0253-3820.191281 shu

Study on Sandwich Structure Toluene Sensor Based on LaFe_1-xPd_xO₃ Nanofibers

1.
School of Energy and Building Environmental Engineering, Henan University of Urban Construction, Pingdingshan 467036, China;
2.
School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China

Received Date: 15 May 2019
Revised Date: 28 October 2019

Fund Project: This work was supported by the Natural Science Foundation of He'nan Province (No. 182300410264), the Science and Technology Foundation of He'nan Province (No.182102210225) and the Educational Commission of He'nan Province of China (No.18A470002)

A new sandwich structure toluene gas sensor was designed by transferring LaFe_1-xPd_xO₃ 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 LaFe_1-xPd_xO₃ nanofibers were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Sensitive mechanism and electrochemical characteristic of LaFe_1-xPd_xO₃ 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 LaFe_0.9Pd_0.1O₃ nanofiber had a good linear relationship with toluene in the concentration range of 1.0-30 μg/m³ at operating temperature of 200℃. The dynamic response time and recover time of sensor to 30 μg/m³ 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.
- Palladium,
- Perovskite,
- Nanofibers,
- Sensor,
- Toluene
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Study on Sandwich Structure Toluene Sensor Based on LaFe1-xPdxO3 Nanofibers

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通讯作者: 陈斌, bchen63@163.com

Study on Sandwich Structure Toluene Sensor Based on LaFe_1-xPd_xO₃ Nanofibers