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Journal of Shanghai University >

2022 , Vol. 28 >Issue 1: 19 - 30

DOI: https://doi.org/10.12066/j.issn.1007-2861.2284

Research Articles

Synthesis of Ce-doped Co3O4  nanoflowers with rich oxygen vacancies based on MOF template method for enhancing gas sensing performance

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  • School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

Received date: 2020-02-26

  Online published: 2021-05-10

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Abstract

Co3O4  nanomaterials have low sensitivity and long response/recovery time in gas sensor applications. Ce-doped Co-based metal organic framework (MOF) precursors were prepared by a simple solvothermal method and Ce-doped Co3O4  nanoflowers were then successfully synthesised by heat treatment. The morphology and composition of the materials were analysed by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscope (XPS), energy dispersive spectroscope (EDS), and other characterization methods. The results indicated that Ce doping could effectively change the oxygen distribution and increase the number of oxygen vacancies in Co3O4 . The sensor made of this material exhibited an excellent sensing performance. At an operating temperature of 190 °C, the response to 100×10-6 n-butanol could reach 87.79 and the calculated theoretical detection limit could reach 122×10-9.

Key words： Ce-doped; Co3O4 ; gas sensors; oxygen vacancies

Cite this article

HE Yongchao, LI Fei, YAN Bingjun, HE Xinhua, PU Xianjuan, NING Zhukai, CHENG Lingli, JIAO Zheng . Synthesis of Ce-doped Co3O4  nanoflowers with rich oxygen vacancies based on MOF template method for enhancing gas sensing performance[J]. Journal of Shanghai University, 2022 , 28(1) : 19 -30 . DOI: 10.12066/j.issn.1007-2861.2284

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