Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect

Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect

Brush-like α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures were synthesized through a sputtering ZnO seed-assisted hydrothermal growth method. The resulting heterostructures consisted of α-Fe<sub>2</sub>O<sub>3</sub> rod templates and ZnO branched c...

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Main Authors: Yuan-Chang Liang, Yu-Wei Hsu
Format: Article
Language:English
Published: MDPI AG 2021-06-01
Series:International Journal of Molecular Sciences
Subjects:
synthesis
microstructure
composite
sensing ability
enhanced mechanism
Online Access:https://www.mdpi.com/1422-0067/22/13/6884
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spelling doaj-53c1398b613444aaac55124948bb97b72021-07-15T15:37:12ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672021-06-01226884688410.3390/ijms22136884Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic EffectYuan-Chang Liang0Yu-Wei Hsu1Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, TaiwanBrush-like α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures were synthesized through a sputtering ZnO seed-assisted hydrothermal growth method. The resulting heterostructures consisted of α-Fe<sub>2</sub>O<sub>3</sub> 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-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructure-based sensor exhibited excellent sensitivity, selectivity, and stability toward low-concentration NO<sub>2</sub> gas at an optimal temperature of 300 °C. The α-Fe<sub>2</sub>O<sub>3</sub>–ZnO sensor, in particular, demonstrated substantially higher sensitivity compared with pristine α-Fe<sub>2</sub>O<sub>3</sub>, along with faster response and recovery speeds under similar test conditions. An appropriate material synergic effect accounts for the considerable enhancement in the NO<sub>2</sub> gas-sensing performance of the α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures.https://www.mdpi.com/1422-0067/22/13/6884synthesismicrostructurecompositesensing abilityenhanced mechanism
collection DOAJ
language English
format Article
sources DOAJ
author Yuan-Chang Liang
Yu-Wei Hsu
spellingShingle Yuan-Chang Liang
Yu-Wei Hsu
Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect
International Journal of Molecular Sciences
synthesis
microstructure
composite
sensing ability
enhanced mechanism
author_facet Yuan-Chang Liang
Yu-Wei Hsu
author_sort Yuan-Chang Liang
title Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect
title_short Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect
title_full Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect
title_fullStr Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect
title_full_unstemmed Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect
title_sort enhanced sensing ability of brush-like fe<sub>2</sub>o<sub>3</sub>-zno nanostructures towards no<sub>2</sub> gas via manipulating material synergistic effect
publisher MDPI AG
series International Journal of Molecular Sciences
issn 1661-6596
1422-0067
publishDate 2021-06-01
description Brush-like α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures were synthesized through a sputtering ZnO seed-assisted hydrothermal growth method. The resulting heterostructures consisted of α-Fe<sub>2</sub>O<sub>3</sub> 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-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructure-based sensor exhibited excellent sensitivity, selectivity, and stability toward low-concentration NO<sub>2</sub> gas at an optimal temperature of 300 °C. The α-Fe<sub>2</sub>O<sub>3</sub>–ZnO sensor, in particular, demonstrated substantially higher sensitivity compared with pristine α-Fe<sub>2</sub>O<sub>3</sub>, along with faster response and recovery speeds under similar test conditions. An appropriate material synergic effect accounts for the considerable enhancement in the NO<sub>2</sub> gas-sensing performance of the α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures.
topic synthesis
microstructure
composite
sensing ability
enhanced mechanism
url https://www.mdpi.com/1422-0067/22/13/6884
work_keys_str_mv AT yuanchangliang enhancedsensingabilityofbrushlikefesub2subosub3subznonanostructurestowardsnosub2subgasviamanipulatingmaterialsynergisticeffect
AT yuweihsu enhancedsensingabilityofbrushlikefesub2subosub3subznonanostructurestowardsnosub2subgasviamanipulatingmaterialsynergisticeffect
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