Construction of 1D/2D α -Fe2 O3 /SnO2 Hybrid Nanoarrays for Sub-ppm Acetone Detection

Research : a Science Partner Journal
Huimin GongFei Wang

Abstract

Exhaled acetone is one of the representative biomarkers for the noninvasive diagnosis of type-1 diabetes. In this work, we have applied a facile two-step chemical bath deposition method for acetone sensors based on α-Fe2O3/SnO2 hybrid nanoarrays (HNAs), where one-dimensional (1D) FeOOH nanorods are in situ grown on the prefabricated 2D SnO2 nanosheets for on-chip construction of 1D/2D HNAs. After annealing in air, ultrafine α-Fe2O3 nanorods are homogenously distributed on the surface of SnO2 nanosheet arrays (NSAs). Gas sensing results show that the α-Fe2O3/SnO2 HNAs exhibit a greatly enhanced response to acetone (3.25 at 0.4 ppm) at a sub-ppm level compared with those based on pure SnO2 NSAs (1.16 at 0.4 ppm) and pure α-Fe2O3 nanorods (1.03 at 0.4 ppm), at an operating temperature of 340°C. The enhanced acetone sensing performance may be attributed to the formation of α-Fe2O3-SnO2 n-n heterostructure with 1D/2D hybrid architectures. Moreover, the α-Fe2O3/SnO2 HNAs also possess good reproducibility and selectivity toward acetone vapor, suggesting its potential application in breath acetone analysis.

References

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May 28, 2019·Microsystems & Nanoengineering·Gaoqiang NiuFei Wang
Jul 13, 2019·Nanomaterials·Kefeng WeiYanbai Shen

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Citations

Jan 23, 2021·Sensors·Muthaiah Shellaiah, Kien Wen Sun
Oct 17, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Laurie AndréStéphane Brandès

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