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Volume 22
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10.3390/ijms22136884
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Article

Enhanced Sensing Ability of Brush-Like Fe2O3-ZnO Nanostructures towards NO2 Gas via Manipulating Material Synergistic Effect

by
Yuan-Chang Liang
* and
Yu-Wei Hsu
Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, Taiwan
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2021, 22(13), 6884; https://doi.org/10.3390/ijms22136884
Submission received: 24 May 2021 / Revised: 20 June 2021 / Accepted: 24 June 2021 / Published: 26 June 2021
(This article belongs to the Special Issue Multifunctional Nanomaterials: Synthesis, Properties and Applications)
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Abstract

Brush-like α-Fe2O3–ZnO heterostructures were synthesized through a sputtering ZnO seed-assisted hydrothermal growth method. The resulting heterostructures consisted of α-Fe2O3 rod templates and ZnO branched crystals with an average diameter of approximately 12 nm and length of 25 nm. The gas-sensing results demonstrated that the α-Fe2O3–ZnO heterostructure-based sensor exhibited excellent sensitivity, selectivity, and stability toward low-concentration NO2 gas at an optimal temperature of 300 °C. The α-Fe2O3–ZnO sensor, in particular, demonstrated substantially higher sensitivity compared with pristine α-Fe2O3, along with faster response and recovery speeds under similar test conditions. An appropriate material synergic effect accounts for the considerable enhancement in the NO2 gas-sensing performance of the α-Fe2O3–ZnO heterostructures.
Keywords: synthesis; microstructure; composite; sensing ability; enhanced mechanism synthesis; microstructure; composite; sensing ability; enhanced mechanism

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MDPI and ACS Style

Liang, Y.-C.; Hsu, Y.-W. Enhanced Sensing Ability of Brush-Like Fe2O3-ZnO Nanostructures towards NO2 Gas via Manipulating Material Synergistic Effect. Int. J. Mol. Sci. 2021, 22, 6884. https://doi.org/10.3390/ijms22136884

AMA Style

Liang Y-C, Hsu Y-W. Enhanced Sensing Ability of Brush-Like Fe2O3-ZnO Nanostructures towards NO2 Gas via Manipulating Material Synergistic Effect. International Journal of Molecular Sciences. 2021; 22(13):6884. https://doi.org/10.3390/ijms22136884

Chicago/Turabian Style

Liang, Yuan-Chang, and Yu-Wei Hsu. 2021. "Enhanced Sensing Ability of Brush-Like Fe2O3-ZnO Nanostructures towards NO2 Gas via Manipulating Material Synergistic Effect" International Journal of Molecular Sciences 22, no. 13: 6884. https://doi.org/10.3390/ijms22136884

APA Style

Liang, Y.-C., & Hsu, Y.-W. (2021). Enhanced Sensing Ability of Brush-Like Fe2O3-ZnO Nanostructures towards NO2 Gas via Manipulating Material Synergistic Effect. International Journal of Molecular Sciences, 22(13), 6884. https://doi.org/10.3390/ijms22136884

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