Facile one-step hydrothermal synthesis and room-temperature NO2 sensing application of α-Fe2O3 sensor

Sushil S. Sangale; Vijaykumar V. Jadhav; Shoyebmohamad F. Shaikh; Pritamkumar V. Shinde; Balaji G. Ghule; Siddheshwar D. Raut; Mohaseen S. Tamboli; Abdullah M. Al-Enizi; Rajaram S. Mane

doi:10.1016/j.matchemphys.2020.122799

Facile one-step hydrothermal synthesis and room-temperature NO₂ sensing application of α-Fe₂O₃ sensor

Sushil S. Sangale, Vijaykumar V. Jadhav, Shoyebmohamad F. Shaikh, Pritamkumar V. Shinde, Balaji G. Ghule, Siddheshwar D. Raut, Mohaseen S. Tamboli, Abdullah M. Al-Enizi, Rajaram S. Mane^*

^*Corresponding author for this work

Materials Science and Engineering

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19 Scopus citations

Abstract

An alpha-iron oxide (α-Fe₂O₃) film-sensor prepared by a simple one-step hydrothermal synthesis technique demonstrates a high selectivity and sensitivity toward NO₂ at room-temperature (27 °C). The XRD pattern of the as-synthesized sensor endows polycrystalline nature and hematite crystal structure. The gas sensing properties of α-Fe₂O₃ sensor are investigated against various target gases viz. hydrogen (H₂), nitrogen dioxide (NO₂), sulfur dioxide (SO₂), carbon dioxide (CO₂), liquefied petroleum gas (LPG), and carbon monoxide (CO). Due to a high specific surface area, special structure, and high electron contributing power over other tested gases, α-Fe₂O₃ sensor exhibits a high response, with good response/recovery time for NO₂ gas. The α-Fe₂O₃ sensor shows 86% response for 100 ppm concentration of NO₂ gas with excellent response/recovery time (31/32 s) and reported. The α-Fe₂O₃ sensor performance is measured for various concentration levels of NO₂ gas. The theoretically proposed gas sensing mechanism also suggests a better response of the α-Fe₂O₃ sensor to NO₂ gas over other gases. The room-temperature sensing operation, high selectivity, moderate repeatability and short response/recovery time with cost-effectiveness followed scalable synthesis of α-Fe₂O₃ sensor would decidedly useful for social and commercial benefits.

Original language	English
Article number	122799
Journal	Materials Chemistry and Physics
Volume	246
DOIs	https://doi.org/10.1016/j.matchemphys.2020.122799
State	Published - 1 May 2020

Keywords

Hydrothermal method
Mesoporous
Nitrogen dioxide (NO) gas sensor
α-FeO

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title = "Facile one-step hydrothermal synthesis and room-temperature NO2 sensing application of α-Fe2O3 sensor",

abstract = "An alpha-iron oxide (α-Fe2O3) film-sensor prepared by a simple one-step hydrothermal synthesis technique demonstrates a high selectivity and sensitivity toward NO2 at room-temperature (27 °C). The XRD pattern of the as-synthesized sensor endows polycrystalline nature and hematite crystal structure. The gas sensing properties of α-Fe2O3 sensor are investigated against various target gases viz. hydrogen (H2), nitrogen dioxide (NO2), sulfur dioxide (SO2), carbon dioxide (CO2), liquefied petroleum gas (LPG), and carbon monoxide (CO). Due to a high specific surface area, special structure, and high electron contributing power over other tested gases, α-Fe2O3 sensor exhibits a high response, with good response/recovery time for NO2 gas. The α-Fe2O3 sensor shows 86% response for 100 ppm concentration of NO2 gas with excellent response/recovery time (31/32 s) and reported. The α-Fe2O3 sensor performance is measured for various concentration levels of NO2 gas. The theoretically proposed gas sensing mechanism also suggests a better response of the α-Fe2O3 sensor to NO2 gas over other gases. The room-temperature sensing operation, high selectivity, moderate repeatability and short response/recovery time with cost-effectiveness followed scalable synthesis of α-Fe2O3 sensor would decidedly useful for social and commercial benefits.",

keywords = "Hydrothermal method, Mesoporous, Nitrogen dioxide (NO) gas sensor, α-FeO",

author = "Sangale, {Sushil S.} and Jadhav, {Vijaykumar V.} and Shaikh, {Shoyebmohamad F.} and Shinde, {Pritamkumar V.} and Ghule, {Balaji G.} and Raut, {Siddheshwar D.} and Tamboli, {Mohaseen S.} and Al-Enizi, {Abdullah M.} and Mane, {Rajaram S.}",

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year = "2020",

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doi = "10.1016/j.matchemphys.2020.122799",

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T1 - Facile one-step hydrothermal synthesis and room-temperature NO2 sensing application of α-Fe2O3 sensor

AU - Sangale, Sushil S.

AU - Jadhav, Vijaykumar V.

AU - Shaikh, Shoyebmohamad F.

AU - Shinde, Pritamkumar V.

AU - Ghule, Balaji G.

AU - Raut, Siddheshwar D.

AU - Tamboli, Mohaseen S.

AU - Al-Enizi, Abdullah M.

AU - Mane, Rajaram S.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - An alpha-iron oxide (α-Fe2O3) film-sensor prepared by a simple one-step hydrothermal synthesis technique demonstrates a high selectivity and sensitivity toward NO2 at room-temperature (27 °C). The XRD pattern of the as-synthesized sensor endows polycrystalline nature and hematite crystal structure. The gas sensing properties of α-Fe2O3 sensor are investigated against various target gases viz. hydrogen (H2), nitrogen dioxide (NO2), sulfur dioxide (SO2), carbon dioxide (CO2), liquefied petroleum gas (LPG), and carbon monoxide (CO). Due to a high specific surface area, special structure, and high electron contributing power over other tested gases, α-Fe2O3 sensor exhibits a high response, with good response/recovery time for NO2 gas. The α-Fe2O3 sensor shows 86% response for 100 ppm concentration of NO2 gas with excellent response/recovery time (31/32 s) and reported. The α-Fe2O3 sensor performance is measured for various concentration levels of NO2 gas. The theoretically proposed gas sensing mechanism also suggests a better response of the α-Fe2O3 sensor to NO2 gas over other gases. The room-temperature sensing operation, high selectivity, moderate repeatability and short response/recovery time with cost-effectiveness followed scalable synthesis of α-Fe2O3 sensor would decidedly useful for social and commercial benefits.

AB - An alpha-iron oxide (α-Fe2O3) film-sensor prepared by a simple one-step hydrothermal synthesis technique demonstrates a high selectivity and sensitivity toward NO2 at room-temperature (27 °C). The XRD pattern of the as-synthesized sensor endows polycrystalline nature and hematite crystal structure. The gas sensing properties of α-Fe2O3 sensor are investigated against various target gases viz. hydrogen (H2), nitrogen dioxide (NO2), sulfur dioxide (SO2), carbon dioxide (CO2), liquefied petroleum gas (LPG), and carbon monoxide (CO). Due to a high specific surface area, special structure, and high electron contributing power over other tested gases, α-Fe2O3 sensor exhibits a high response, with good response/recovery time for NO2 gas. The α-Fe2O3 sensor shows 86% response for 100 ppm concentration of NO2 gas with excellent response/recovery time (31/32 s) and reported. The α-Fe2O3 sensor performance is measured for various concentration levels of NO2 gas. The theoretically proposed gas sensing mechanism also suggests a better response of the α-Fe2O3 sensor to NO2 gas over other gases. The room-temperature sensing operation, high selectivity, moderate repeatability and short response/recovery time with cost-effectiveness followed scalable synthesis of α-Fe2O3 sensor would decidedly useful for social and commercial benefits.

KW - Hydrothermal method

KW - Mesoporous

KW - Nitrogen dioxide (NO) gas sensor

KW - α-FeO

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DO - 10.1016/j.matchemphys.2020.122799

M3 - 文章

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SN - 0254-0584

VL - 246

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

M1 - 122799

ER -

Facile one-step hydrothermal synthesis and room-temperature NO₂ sensing application of α-Fe₂O₃ sensor

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Keywords

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