Citation: Ruixue Mo, Dongqiang Han, Zeng Ren, Dazhuang Yang, Fei Wang, Caolong Li. Hollow Fe₂O₃/Co₃O₄ microcubes derived from metal-organic framework for enhanced sensing performance towards acetone[J]. Chinese Chemical Letters, ;2021, 32(11): 3619-3622. doi: 10.1016/j.cclet.2021.06.062 shu

Hollow Fe₂O₃/Co₃O₄ microcubes derived from metal-organic framework for enhanced sensing performance towards acetone

Ruixue Mo ^{a, 1} ,
Dongqiang Han ^{b, 1} ,
Zeng Ren ^c ,
Dazhuang Yang ^a ,
Fei Wang ^{a, *,} ,
Caolong Li ^{a, *,}

a.
Key Laboratory of Biomedical Functional Materials, College of Science, China Pharmaceutical University, Nanjing 211198, China
b.
Department of Physics, College of Science, China Pharmaceutical University, Nanjing 211198, China
c.
Institute of Tibetan Medicine, University of Tibetan Medicine, Lhasa 850000, China

feiwang@cpu.edu.cn

licl@cpu.edu.cn

Received Date: 30 April 2021
Revised Date: 5 June 2021
Accepted Date: 23 June 2021
Available Online: 11 July 2021

Figures(7)

In this work, hollow Fe₂O₃/Co₃O₄ microcubes have been successfully synthesized through a hydrothermal method followed by an annealing process using metal-organic framework of Prussian blue as a soft template. The morphologies, microstructures, surface area and element compositions have been carefully characterized by a series of techniques. Meanwhile, compared with that of pure Fe₂O₃ and Co₃O₄, the gas sensor based on the hollow microcubes exhibits enhanced sensing performances towards acetone, e.g., a higher response of 21.2 and a shorter response time of 5 s towards 20 ppm acetone at a relatively low working temperature of 200 ℃. Moreover, the hollow microcubes-based gas sensor still shows perfect long-term stability, excellent repeatability and the ability of sub-ppm level detection, which provides a possibility for its application in real life. The enhanced gas sensing performances can be attributed to the hollow structure with a high surface area and the formed p-n heterojunctions within the microcubes.
- Acetone,
- Fe₂O₃,
- Co₃O₄,
- Metal-organic frameworks,
- Heterojunctions,
- Gas sensor
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Hollow Fe₂O₃/Co₃O₄ microcubes derived from metal-organic framework for enhanced sensing performance towards acetone