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 Febr. 2023
Accepted
02 Apr. 2023
First published
03 Apr. 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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