A highly efficient acetone gas sensor based on 2D porous ZnFe2O4 nanosheets

Wen, Ziying; Ren, Haibo; Li, Dongxu; Lü, Xiaojing; Joo, Sang Woo; Huang, Jiarui

doi:10.1016/j.snb.2023.133287

Cited by 16 publications

(1 citation statement)

References 67 publications

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“…Due to its unique crystal structure, low cost, non-toxic and easy preparation, ZnFe 2 O 4 is one of the most widely studied spinel structured MOS for kinds of applications and, gas sensing. To improve its sensor performance, ZnFe 2 O 4 with different morphologies have been synthesized [10][11][12]. In particular, ZnFe 2 O 4 with a porous structure showed promising properties because of its high surface area and pore structures, which would enable more gas molecules to react with it [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

SnO₂ QDs sensitized ZnFe₂O₄ spheres with enhanced acetone sensing performance

Yuan,

Li,

Xia

et al. 2024

Nanotechnology

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Herein, SnO2 QDs (<10 nm) with small size instead of conventional nanoparticles was employed to modify ZnFe2O4to synthesize porous and heterogeneous SnO2/ZnFe2O4(ZFSQ) composites for gas sensing. By an immersion process combined with calcination treatment, the resultant porous ZFSQ composites with different contents of SnO2 QDs were obtained and their sensing properties were investigated. Compared with that of bare ZnFe2O4 and SnO2 QDs, porous ZFSQ composites based sensors showed much improved sensor response to acetone. For contrast, the sensor performance of ZFSQ composites was also compared with that of ZnFe2O4 sphere modified with SnO2 nanoparticles. The porous ZFSQ composite with 5 wt% SnO2 QDs (ZFSQ-5) showed better acetone sensing response than that of other ZFSQ composites, and it exhibited a high response value of 110 to 100 ppm of acetone and a low detection limit of 0.3 ppm at 240℃ . In addition to the rich heterojunctions and porous structure, SnO2 QDs with large surface area and quantum effect was another indispensable reason for the improved sensor performance. Finally, the ZFSQ-5 composite sensor was attempted to be applied for acetone sensing in exhaled breath, suggesting its great potential in monitoring of acetone.

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