α-MnO2 Nanowires as Potential Scaffolds for a High-Performance Formaldehyde Gas Sensor Device

Ahmad Umar; Ahmed A. Ibrahim; Rajesh Kumar; Hassan Algadi; Hasan Albargi; Faheem Ahmad; Wen Zeng; M. Shaheer Akhtar

doi:10.3390/coatings11070860

α-MnO2 Nanowires as Potential Scaffolds for a High-Performance Formaldehyde Gas Sensor Device

Ahmad Umar^*
, Ahmed A. Ibrahim
, Rajesh Kumar
, Hassan Algadi
, Hasan Albargi
, Faheem Ahmad
, Wen Zeng
, M. Shaheer Akhtar^*

^*Corresponding author for this work

Graduate School of Intergrated Physical-AI

Najran University
Jagdish Chandra DAV College
King Faisal University
Chongqing University

Research output: Contribution to journal › Journal article › peer-review

15 Scopus citations

Abstract

Herein, we report a chemi-resistive sensing method for the detection of formaldehyde (HCHO) gas. For this, α-MnO2 nanowires were synthesized hydrothermally and examined for as-certaining their chemical composition, crystal phase, morphology, purity, and vibrational proper-ties. The XRD pattern confirmed the high crystallinity and purity of the α-MnO2 nanowires. FESEM images confirmed a random orientation and smooth-surfaced wire-shaped morphologies for as-synthesized α-MnO2 nanowires. Further, the synthesized nanowires with rounded tips had a uni-form diameter throughout the length of the nanowires. The average diameter of the α-MnO2 nan-owires was found to be 62.18 nm and the average length was ~2.0 μm. Further, at an optimized temperature of 300 °C, the fabricated HCHO sensor based on α-MnO2 nanowires demonstrated gas response, response, and recovery times of 19.37, 18, and 30 s, respectively.

Original language	English
Article number	860
Journal	Coatings
Volume	11
Issue number	7
DOIs	https://doi.org/10.3390/coatings11070860
State	Published - 2021.07

Keywords

Formaldehyde
Gas sensor
High-performance
Nanowires
α-MnO2

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Physics & Astronomy

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10.3390/coatings11070860

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@article{b7065d5bcb8e4eb882c48b06280ab58e,

title = "α-MnO2 Nanowires as Potential Scaffolds for a High-Performance Formaldehyde Gas Sensor Device",

abstract = "Herein, we report a chemi-resistive sensing method for the detection of formaldehyde (HCHO) gas. For this, α-MnO2 nanowires were synthesized hydrothermally and examined for as-certaining their chemical composition, crystal phase, morphology, purity, and vibrational proper-ties. The XRD pattern confirmed the high crystallinity and purity of the α-MnO2 nanowires. FESEM images confirmed a random orientation and smooth-surfaced wire-shaped morphologies for as-synthesized α-MnO2 nanowires. Further, the synthesized nanowires with rounded tips had a uni-form diameter throughout the length of the nanowires. The average diameter of the α-MnO2 nan-owires was found to be 62.18 nm and the average length was \textasciitilde{}2.0 μm. Further, at an optimized temperature of 300 °C, the fabricated HCHO sensor based on α-MnO2 nanowires demonstrated gas response, response, and recovery times of 19.37, 18, and 30 s, respectively.",

keywords = "Formaldehyde, Gas sensor, High-performance, Nanowires, α-MnO2",

author = "Ahmad Umar and Ibrahim, \{Ahmed A.\} and Rajesh Kumar and Hassan Algadi and Hasan Albargi and Faheem Ahmad and Wen Zeng and Akhtar, \{M. Shaheer\}",

note = "Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = jul,

doi = "10.3390/coatings11070860",

language = "English",

volume = "11",

journal = "Coatings",

issn = "2079-6412",

number = "7",

}

TY - JOUR

T1 - α-MnO2 Nanowires as Potential Scaffolds for a High-Performance Formaldehyde Gas Sensor Device

AU - Umar, Ahmad

AU - Ibrahim, Ahmed A.

AU - Kumar, Rajesh

AU - Algadi, Hassan

AU - Albargi, Hasan

AU - Ahmad, Faheem

AU - Zeng, Wen

AU - Akhtar, M. Shaheer

PY - 2021/7

Y1 - 2021/7

N2 - Herein, we report a chemi-resistive sensing method for the detection of formaldehyde (HCHO) gas. For this, α-MnO2 nanowires were synthesized hydrothermally and examined for as-certaining their chemical composition, crystal phase, morphology, purity, and vibrational proper-ties. The XRD pattern confirmed the high crystallinity and purity of the α-MnO2 nanowires. FESEM images confirmed a random orientation and smooth-surfaced wire-shaped morphologies for as-synthesized α-MnO2 nanowires. Further, the synthesized nanowires with rounded tips had a uni-form diameter throughout the length of the nanowires. The average diameter of the α-MnO2 nan-owires was found to be 62.18 nm and the average length was ~2.0 μm. Further, at an optimized temperature of 300 °C, the fabricated HCHO sensor based on α-MnO2 nanowires demonstrated gas response, response, and recovery times of 19.37, 18, and 30 s, respectively.

AB - Herein, we report a chemi-resistive sensing method for the detection of formaldehyde (HCHO) gas. For this, α-MnO2 nanowires were synthesized hydrothermally and examined for as-certaining their chemical composition, crystal phase, morphology, purity, and vibrational proper-ties. The XRD pattern confirmed the high crystallinity and purity of the α-MnO2 nanowires. FESEM images confirmed a random orientation and smooth-surfaced wire-shaped morphologies for as-synthesized α-MnO2 nanowires. Further, the synthesized nanowires with rounded tips had a uni-form diameter throughout the length of the nanowires. The average diameter of the α-MnO2 nan-owires was found to be 62.18 nm and the average length was ~2.0 μm. Further, at an optimized temperature of 300 °C, the fabricated HCHO sensor based on α-MnO2 nanowires demonstrated gas response, response, and recovery times of 19.37, 18, and 30 s, respectively.

KW - Formaldehyde

KW - Gas sensor

KW - High-performance

KW - Nanowires

KW - α-MnO2

UR - https://www.scopus.com/pages/publications/85111399215

U2 - 10.3390/coatings11070860

DO - 10.3390/coatings11070860

M3 - Journal article

AN - SCOPUS:85111399215

SN - 2079-6412

VL - 11

JO - Coatings

JF - Coatings

IS - 7

M1 - 860

ER -

α-MnO2 Nanowires as Potential Scaffolds for a High-Performance Formaldehyde Gas Sensor Device

Abstract

Keywords

Quacquarelli Symonds(QS) Subject Topics

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