Citation: HU Ming-Jiang, LYU Chun-Wang, ZHAO Li-Xia, SONG Yan-Ping, HENG Li-Jun, WANG Xu-Rong. Research on Film-type Volatile Organic Compounds Sensor Based on Pd@SnO₂-ZnO Nanofiber[J]. Chinese Journal of Analytical Chemistry, ;2021, 49(3): 407-414. doi: 10.19756/j.issn.0253-3820.201547 shu

Research on Film-type Volatile Organic Compounds Sensor Based on Pd@SnO₂-ZnO Nanofiber

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

Corresponding author: HU Ming-Jiang, hu_mingjiang@163.com
Received Date: 10 September 2020
Revised Date: 4 January 2021

Fund Project: Natural Science Foundation of He'nan Province (No. 182300410264) and the Science and Technology Foundation of He'nan Province (No.182102210225)

ZnO, SnO₂-ZnO, Pd@ZnO and Pd@SnO₂-ZnO composite nanofibers were synthesized by electrospinning method. On the basis of this, a new film-type volatile organic compounds (VOCs) sensor was designed by transferring the composite nanofibers above onto silicon substrate with platinum-inter digital electrodes by dip-coating method. Multiple characterizations were employed to investigate the crystal structure, composition, morphology, and bonding states of the composite nanofibers. The characteristic tests of Pd@SnO₂-ZnO sensor were carried out in gas sensor test system. The obtained results clearly demonstrated that Pd@SnO₂-ZnO nanofibers exhibited significantly enhanced volatile organic compounds sensing performance compared with other nanofibers. When the operating temperature was 200℃ and the target gas concentration was 30 μg/m³, the responses of Pd@SnO₂-ZnO sensor toward different volatile organic components including toluene, formaldehyde, acetone and ethanol were 70.1, 56, 34.9 and 13.8, respectively. Dynamic response time and recover time of Pd@SnO₂-ZnO sensor were 4.9/9.6, 13.8/12.2, 20.2/17.6 and 29.6/39.6 s respectively, which was much higher than that of ZnO nanofibers. The enhanced VOC sensing properties of Pd@SnO₂-ZnO composite nanofibers could be attributed to the electronic and chemical sensitizations of Pd and the junction formation at the interface of SnO₂ and ZnO.
- Palladium,
- Zinc oxide,
- Nanofibers,
- Sensor,
- Volatile organic compounds
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Research on Film-type Volatile Organic Compounds Sensor Based on Pd@SnO₂-ZnO Nanofiber