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

Xin-Yu Huang, Ya-Ru Kang, Shu Yan, Ahmed Elmarakbi, Yongqing (Richard) Fu*, Wan-Feng Xie*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
27 Downloads (Pure)

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 architectures. 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 mesoporous structure was synthesized by a one-step hydrothermal reaction with the following 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 ºC, and long-time stability up to 60 days. Additionally, the FCN-MOS-based sensors display a p-n transition gas-sensing behavior with the alteration of Fe/Co/Ni ratios.
Original languageEnglish
Pages (from-to)8181-8188
Number of pages8
JournalNanoscale
Volume15
Issue number18
Early online date3 Apr 2023
DOIs
Publication statusPublished - 14 May 2023

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