Citation: HU Ming-Jiang, LYU Chun-Wang, YANG Shi-Bin, WANG Zhong. Research on Cataluminescence Type Formaldehyde Sensor Based on CeO₂-Co₃O₄ Nanofibers[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(11): 1621-1627. doi: 10.11895/j.issn.0253-3820.170221 shu

Research on Cataluminescence Type Formaldehyde Sensor Based on CeO₂-Co₃O₄ Nanofibers

1.
School of Energy and Building Environmental Engineering, Henan University of Urban Construction, Pingdingshan 467036, China;
2.
School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China

Received Date: 12 April 2017
Revised Date: 20 August 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (No.51376083) and the Educational Commission of He'nan Province of China (No.18A470002)

CeO₂-Co₃O₄ composite nanofibers were prepared by the double jets electrospinning method. The nanofibers were then deposited onto the surface of a μ-type heating coil as cataluminescence material to prepare a new cataluminescence (CTL) type formaldehyde gas sensor. The crystalline phase and microstructure of CeO₂-Co₃O₄ composite nanofibers were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), and the cataluminescence mechanism and electrochemical characteristic of formaldehyde on the surface of CeO₂-Co₃O₄ nanofibers were analyzed by H2 temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS). Under the optimal conditions (500 nm of wavelength, 0.2 L/min of flow rate and 550℃), there was a good relationship between the CTL intensity of this formaldehyde gas sensor (Ce30) and formaldehyde concentration in the range of 1.2-50 μg/m³, the sensitivity was 40.04 a.u./(μg/m³), the detection limit was 1.2 μg/m³, the dynamic response time and recover time of formaldehyde gas were 2.4 s and 3.5 s, respectively. The formaldehyde sensor was successfully applied to the determination of formaldehyde in the automotive exhaust, with relative errors of 0.39%-1.07% and relative standard deviations of less than 3%.
- Electrospinning,
- Formaldehyde,
- Sensor,
- Composite nanofibers,
- Cataluminescence,
- Automotive exhaust
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沈阳化工大学材料科学与工程学院沈阳 110142

Research on Cataluminescence Type Formaldehyde Sensor Based on CeO2-Co3O4 Nanofibers

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通讯作者: 陈斌, bchen63@163.com

Research on Cataluminescence Type Formaldehyde Sensor Based on CeO₂-Co₃O₄ Nanofibers