Hierarchical spinel NixCo1-xFe2O4 microcubes derived from Fe-based MOF for high-sensitive acetone sensor. Issue 16 (November 2018)

• Record Type: Journal Article
• Authors: Wu, Shumin; Li, Xianliang; Xu, Yan; Wu, Junbiao; Wang, Zhuopeng; Han, Yide; Zhang, Xia
• Is Part Of: Ceramics international. Volume 44:Issue 16(2018)
• Page Start: 19390
• Page End: 19396
• Publication Date: 2018-11
• Subjects: Acetone sensor -- Hierarchical -- Microstructures; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.07.170
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Hierarchically spinel Ni x Co1- x Fe2 O4 (0.0 ≤ x ≤ 0.5) microcubes were successfully prepared through a combined solvent evaporation strategy and morphology-inherited annealing treatment. By using the Fe-based metal-organic frameworks (MOFs), Fe4 (Fe(CN)6 )3, and inorganic Ni 2+ and Co 2+ acetate salts as co-templated precursors, hierarchical Ni-doped spinel CoFe2 O4 architecture can be obtained, and the Ni/Co substitution ratios can be controlled systematically. The obtained cubic hierarchical Ni x Co1- x Fe2 O4, (0.0 ≤ x ≤ 0.5) composites presented highly acetone sensing properties, among which the Ni0.1 Co0.9 Fe2 O4 composite showed the strongest response performance (with gas response ( R g / R a ) of 1.67 at 240 °C) and excellent reproducibility (for at least 14 cycles), and the proposed acetone sensing mechanism was also discussed. The presented solvent evaporation and co-templated strategy may allow precisely access to fabricating other heteroatom doped inorganic materials with intriguing morphologies, architectures, chemical compositions and tunable sensing properties. Graphical abstract: Hierarchical Ni x Co1- x Fe2 O4 (0.0 ≤ x ≤ 0.5) micro/nano-cubes prepared via inorganic salt-assisted morphology-inherited annealing treatment of Fe-MOF featured selective and reproductive sensing performance towards acetone. fx1