Metal-organic frameworks derived inverse/normal bimetallic spinel oxides toward the selective VOCs and H2S sensing

Shuang Cao; Tingting Zhou; Xiaoyi Xu; Yu Bing; Ning Sui; Juan Wang; Juan Li; Tong Zhang

doi:10.1016/j.jhazmat.2023.131734

Metal-organic frameworks derived inverse/normal bimetallic spinel oxides toward the selective VOCs and H₂S sensing

J Hazard Mater. 2023 Sep 5:457:131734. doi: 10.1016/j.jhazmat.2023.131734. Epub 2023 May 30.

Authors

Shuang Cao¹, Tingting Zhou², Xiaoyi Xu¹, Yu Bing¹, Ning Sui¹, Juan Wang³, Juan Li⁴, Tong Zhang⁵

Affiliations

¹ State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China.
² State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China. Electronic address: zhoutt@jlu.edu.cn.
³ School of Public Health, Jilin University, Changchun 130012, PR China.
⁴ School of Public Health, Jilin University, Changchun 130012, PR China. Electronic address: li_juan@jlu.edu.cn.
⁵ State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China. Electronic address: zhangtong@jlu.edu.cn.

PMID: 37290357
DOI: 10.1016/j.jhazmat.2023.131734

Abstract

As the typical toxic and hazardous gases, volatile organic compounds (VOCs) and hydrogen sulfide (H₂S) pose a threat to the environment and human health. The demand for real-time detection of VOCs and H₂S gases is growing in many application to protect human health and air quality. Therefore, it is essential to develop advance sensing materials for the construction of effective and reliable gas sensors. Herein, bimetallic spinel ferrites with different metal ions (MFe₂O₄, M = Co, Ni, Cu and Zn) were designed by using metal-organic frameworks as templates. The evaluation of cation substitution on crystal structures (inverse/normal spinel structure) and electrical properties (n/p type and band gap) is systematically discussed. The results indicate that p-type NiFe₂O₄ and n-type CuFe₂O₄ nanocubes with inverse spinel structure exhibit high response and great selectivity towards acetone (C₃H₆O) and H₂S, respectively. Moreover, the two sensors also display the detection limits as low as 1 ppm (C₃H₆O) and 0.5 ppm (H₂S), which are far below the threshold values of 750 ppm to acetone and 10 ppm to H₂S for 8 h exposure set by American Conference of Governmental Industrial Hygienists (ACGIH). The finding provides new possibilities for the design of high-performance chemical sensors, which display tremendous potential for practical applications.

Keywords: Acetone; Bimetallic spinel oxides; Gas sensor; Hydrogen sulfide; Metal-organic frameworks.