Self-assembled α-Fe2O3-GO nanocomposites: Studies on physical, magnetic and ammonia sensing properties

Balaji G. Ghule; Nanasaheb M. Shinde; Siddheshwar D. Raut; Shyam K. Gore; Shoyebmohamad F. Shaikh; Satish U. Ekar; Mohd Ubaidullah; James J. Pak; Rajaram S. Mane

doi:10.1016/j.matchemphys.2021.125617

Self-assembled α-Fe₂O₃-GO nanocomposites: Studies on physical, magnetic and ammonia sensing properties

Balaji G. Ghule, Nanasaheb M. Shinde, Siddheshwar D. Raut, Shyam K. Gore, Shoyebmohamad F. Shaikh, Satish U. Ekar, Mohd Ubaidullah, James J. Pak, Rajaram S. Mane

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Self-assembled α-Fe₂O₃-GO nanocomposites (NCs) obtained via rapid, easy and economic microwave–assisted method through the carbonization of sugar in presence of ferric nitrate in different concentrations are envisaged for physical, magnetic and ammonia (NH₃) sensing measurements. The α-Fe₂O₃-GO NCs are composed of uniformly distributed spherical particles of ∼20 nm in size. The effect of varying magnetic field on the surface and structure of the α-Fe₂O₃-GO NCs has also been investigated. Composites endow a better magnetization over the phase-pure. The highest gas response obtained for 100 ppm NH₃ concentration at room-temperature (25 °C) for pristine GO is limited to 8%. Attributed to p-n hetero-junction effect and electron spill-over effect, on the α-Fe₂O₃ doping, the gas response is greatly improved to 80% at room-temperature. Mechanism for the enhanced sensitivity has carefully been addressed. Gas sensing activities of α-Fe₂O₃-GO NCs against various target gases are examined using computer assisted Keithley 6514 electro-source meter. Along with physical properties, magnetic and NH₃ gas sensor performances of the α-Fe₂O₃-GO NCs are measured and reported in-depth.

Original language	English
Article number	125617
Journal	Materials Chemistry and Physics
Volume	278
DOIs	https://doi.org/10.1016/j.matchemphys.2021.125617
Publication status	Published - 2022 Feb 15

Keywords

Magnetic properties
NH sensor
Structural analysis
p-n heterojunction
α-FeO-graphene oxide

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2021.125617

Cite this

@article{7d82b66be32f408f89ca4d71222501c9,

title = "Self-assembled α-Fe2O3-GO nanocomposites: Studies on physical, magnetic and ammonia sensing properties",

abstract = "Self-assembled α-Fe2O3-GO nanocomposites (NCs) obtained via rapid, easy and economic microwave–assisted method through the carbonization of sugar in presence of ferric nitrate in different concentrations are envisaged for physical, magnetic and ammonia (NH3) sensing measurements. The α-Fe2O3-GO NCs are composed of uniformly distributed spherical particles of ∼20 nm in size. The effect of varying magnetic field on the surface and structure of the α-Fe2O3-GO NCs has also been investigated. Composites endow a better magnetization over the phase-pure. The highest gas response obtained for 100 ppm NH3 concentration at room-temperature (25 °C) for pristine GO is limited to 8%. Attributed to p-n hetero-junction effect and electron spill-over effect, on the α-Fe2O3 doping, the gas response is greatly improved to 80% at room-temperature. Mechanism for the enhanced sensitivity has carefully been addressed. Gas sensing activities of α-Fe2O3-GO NCs against various target gases are examined using computer assisted Keithley 6514 electro-source meter. Along with physical properties, magnetic and NH3 gas sensor performances of the α-Fe2O3-GO NCs are measured and reported in-depth.",

keywords = "Magnetic properties, NH sensor, Structural analysis, p-n heterojunction, α-FeO-graphene oxide",

author = "Ghule, {Balaji G.} and Shinde, {Nanasaheb M.} and Raut, {Siddheshwar D.} and Gore, {Shyam K.} and Shaikh, {Shoyebmohamad F.} and Ekar, {Satish U.} and Mohd Ubaidullah and Pak, {James J.} and Mane, {Rajaram S.}",

note = "Funding Information: The authors are thankful to the Researchers supporting project number ( RSP-2021/370 ), King Saud University, Riyadh, Saudi Arabia for financial support. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = feb,

day = "15",

doi = "10.1016/j.matchemphys.2021.125617",

language = "English",

volume = "278",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Self-assembled α-Fe2O3-GO nanocomposites

T2 - Studies on physical, magnetic and ammonia sensing properties

AU - Ghule, Balaji G.

AU - Shinde, Nanasaheb M.

AU - Raut, Siddheshwar D.

AU - Gore, Shyam K.

AU - Shaikh, Shoyebmohamad F.

AU - Ekar, Satish U.

AU - Ubaidullah, Mohd

AU - Pak, James J.

AU - Mane, Rajaram S.

N1 - Funding Information: The authors are thankful to the Researchers supporting project number ( RSP-2021/370 ), King Saud University, Riyadh, Saudi Arabia for financial support. Publisher Copyright: © 2021 Elsevier B.V.

PY - 2022/2/15

Y1 - 2022/2/15

N2 - Self-assembled α-Fe2O3-GO nanocomposites (NCs) obtained via rapid, easy and economic microwave–assisted method through the carbonization of sugar in presence of ferric nitrate in different concentrations are envisaged for physical, magnetic and ammonia (NH3) sensing measurements. The α-Fe2O3-GO NCs are composed of uniformly distributed spherical particles of ∼20 nm in size. The effect of varying magnetic field on the surface and structure of the α-Fe2O3-GO NCs has also been investigated. Composites endow a better magnetization over the phase-pure. The highest gas response obtained for 100 ppm NH3 concentration at room-temperature (25 °C) for pristine GO is limited to 8%. Attributed to p-n hetero-junction effect and electron spill-over effect, on the α-Fe2O3 doping, the gas response is greatly improved to 80% at room-temperature. Mechanism for the enhanced sensitivity has carefully been addressed. Gas sensing activities of α-Fe2O3-GO NCs against various target gases are examined using computer assisted Keithley 6514 electro-source meter. Along with physical properties, magnetic and NH3 gas sensor performances of the α-Fe2O3-GO NCs are measured and reported in-depth.

AB - Self-assembled α-Fe2O3-GO nanocomposites (NCs) obtained via rapid, easy and economic microwave–assisted method through the carbonization of sugar in presence of ferric nitrate in different concentrations are envisaged for physical, magnetic and ammonia (NH3) sensing measurements. The α-Fe2O3-GO NCs are composed of uniformly distributed spherical particles of ∼20 nm in size. The effect of varying magnetic field on the surface and structure of the α-Fe2O3-GO NCs has also been investigated. Composites endow a better magnetization over the phase-pure. The highest gas response obtained for 100 ppm NH3 concentration at room-temperature (25 °C) for pristine GO is limited to 8%. Attributed to p-n hetero-junction effect and electron spill-over effect, on the α-Fe2O3 doping, the gas response is greatly improved to 80% at room-temperature. Mechanism for the enhanced sensitivity has carefully been addressed. Gas sensing activities of α-Fe2O3-GO NCs against various target gases are examined using computer assisted Keithley 6514 electro-source meter. Along with physical properties, magnetic and NH3 gas sensor performances of the α-Fe2O3-GO NCs are measured and reported in-depth.

KW - Magnetic properties

KW - NH sensor

KW - Structural analysis

KW - p-n heterojunction

KW - α-FeO-graphene oxide

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DO - 10.1016/j.matchemphys.2021.125617

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