Issue 18, 2023

Metal–organic framework-derived trimetallic oxides with dual sensing functions for ethanol

Abstract

Metal–organic framework (MOF)-derived metal oxide semiconductors have recently received extensive attention in gas sensing applications due to their high porosity and three-dimensional architecture. Still, challenges remain for MOF-derived materials, including low-cost and facile synthetic methods, rational nanostructure design, and superior gas-sensing performances. Herein, a series of Fe-MIL-88B-derived trimetallic FeCoNi oxides (FCN-MOS) with a mesoporous structure were synthesized by a one-step hydrothermal reaction followed by calcination. The FCN-MOS system consists of three main phases: α-Fe2O3 (n-type), CoFe2O4, and NiFe2O4 (p-type), and the nanostructure and pore size can be controlled by altering the content of α-Fe2O3, CoFe2O4, and NiFe2O4. The sensors based on FCN-MOS exhibit a high response of 71.9, a good selectivity towards 100 ppm ethanol at 250 °C, and long-term stability up to 60 days. Additionally, the FCN-MOS-based sensors show a p–n transition gas sensing behavior with the alteration of the Fe/Co/Ni ratio.

Graphical abstract: Metal–organic framework-derived trimetallic oxides with dual sensing functions for ethanol

Supplementary files

Article information

Article type
Paper
Submitted
22 2 2023
Accepted
02 4 2023
First published
03 4 2023
This article is Open Access
Creative Commons BY license

Nanoscale, 2023,15, 8181-8188

Metal–organic framework-derived trimetallic oxides with dual sensing functions for ethanol

X. Huang, Y. Kang, S. Yan, A. Elmarakbi, Y. Fu and W. Xie, Nanoscale, 2023, 15, 8181 DOI: 10.1039/D3NR00841J

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