Synthesis of porous ZnFe2O4/SnO2 core-shell spheres for high-performance acetone gas sensing

He, Lifang, Hu, Jingjie, Yuan, Qiming, Xia, Zhangcheng, Jin, Ling, Gao, Hongliang, Fan, Liyuan, Chu, Xiangfeng, and Meng, Fanli (2023) Synthesis of porous ZnFe2O4/SnO2 core-shell spheres for high-performance acetone gas sensing. Sensors and Actuators B: Chemical, 378. 133123.

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For developing promising gas sensing materials, constructing porous and heterojunction structures within the whole semiconductor oxide composites was an ideal strategy. However, it was always difficult because there existed grain boundaries. Herein, the pre-synthesized tiny SnO2 nanospheres could be evenly combined with ZnFe2O4 to form the ZnFe2O4/SnO2 (ZFO/SNO) composite with porous core-shell spheres structure via a simple solvent thermal reaction followed by the calcination treatment. Molar ratios of Zn to Sn were adjusted, and the resultant porous ZFO/SNO composites with different morphology were obtained, and their gas sensing properties were investigated and compared. The result indicated that the porous ZFO/SNO composite with a Zn to Sn ratio of 1:0.7 (ZFO/SNO-0.7) showed much better acetone sensing performance than that of bare porous ZnFe2O4 spheres and other ZFO/SNO composites. It exhibited a high response value of 120 to 100 ppm of acetone at 210℃ with good stability, and the detection limit can reach 0.1 ppm. The remarkable sensor performance of the porous ZFO/SNO-0.7 composite was attributed to its rich heterojunctions, porous structure and small nanoparticle size.

Item ID: 77193
Item Type: Article (Research - C1)
ISSN: 1873-3077
Keywords: ZnFe2O4; SnO2; Acetone; Gas senso; rHeterogeneous
Copyright Information: © 2022 Elsevier B.V. All rights reserved
Research Data:
Date Deposited: 31 Jan 2023 04:42
FoR Codes: 34 CHEMICAL SCIENCES > 3401 Analytical chemistry > 340108 Sensor technology (incl. chemical aspects) @ 100%
SEO Codes: 18 ENVIRONMENTAL MANAGEMENT > 1801 Air quality, atmosphere and weather > 180101 Air quality @ 100%
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