Switchable p-n gas response for 3D-hierarchical NiFe2O4 porous microspheres for highly selective and sensitive toluene gas sensors

K. Karuppasamy; Bharat Sharma; Dhanasekaran Vikraman; Eun Bee Jo; P. Sivakumar; Hyun Seok Kim

doi:10.1016/j.jallcom.2021.161281

Switchable p-n gas response for 3D-hierarchical NiFe₂O₄ porous microspheres for highly selective and sensitive toluene gas sensors

K. Karuppasamy, Bharat Sharma, Dhanasekaran Vikraman, Eun Bee Jo, P. Sivakumar, Hyun Seok Kim

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

36 Scopus citations

Abstract

Rationally designed gas sensing materials have become essential for modern efficient gas sensor with enhanced performance. This study designed and prepared ordered porous, three-dimensional hierarchical NiFe₂O₄ (NFO) nanoarchitectures for highly selective and sensitive toluene sensors. Two hierarchical NFO nanostructures including nanospheres and microsphere were fabricated by facile hydrothermal (NFO-Hy) and temperature-programmed calcination (NFO-550), respectively. Physicochemical characterization confirmed structure, composition, and morphology for the as-prepared materials. Nitrogen adsorption-desorption revealed improved surface area and porous properties for NFO-550 compared with NFO-Hy sensing materials, and the NFO-550 sensor achieved the maximum response 5.65 higher than NFO-Hy at optimal operating temperature. Primary analyses for carcinogenic analyte detection suggest NFO as a gas-sensitive material to be potential applicants for real-world toluene gas sensing applications.

Original language	English
Article number	161281
Journal	Journal of Alloys and Compounds
Volume	886
DOIs	https://doi.org/10.1016/j.jallcom.2021.161281
State	Published - 15 Dec 2021

Keywords

Microsphere
Nickel iron oxide
Textural properties
Toluene sensor
Toxic analyte

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10.1016/j.jallcom.2021.161281

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title = "Switchable p-n gas response for 3D-hierarchical NiFe2O4 porous microspheres for highly selective and sensitive toluene gas sensors",

abstract = "Rationally designed gas sensing materials have become essential for modern efficient gas sensor with enhanced performance. This study designed and prepared ordered porous, three-dimensional hierarchical NiFe2O4 (NFO) nanoarchitectures for highly selective and sensitive toluene sensors. Two hierarchical NFO nanostructures including nanospheres and microsphere were fabricated by facile hydrothermal (NFO-Hy) and temperature-programmed calcination (NFO-550), respectively. Physicochemical characterization confirmed structure, composition, and morphology for the as-prepared materials. Nitrogen adsorption-desorption revealed improved surface area and porous properties for NFO-550 compared with NFO-Hy sensing materials, and the NFO-550 sensor achieved the maximum response 5.65 higher than NFO-Hy at optimal operating temperature. Primary analyses for carcinogenic analyte detection suggest NFO as a gas-sensitive material to be potential applicants for real-world toluene gas sensing applications.",

keywords = "Microsphere, Nickel iron oxide, Textural properties, Toluene sensor, Toxic analyte",

author = "K. Karuppasamy and Bharat Sharma and Dhanasekaran Vikraman and Jo, {Eun Bee} and P. Sivakumar and Kim, {Hyun Seok}",

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year = "2021",

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doi = "10.1016/j.jallcom.2021.161281",

language = "English",

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T1 - Switchable p-n gas response for 3D-hierarchical NiFe2O4 porous microspheres for highly selective and sensitive toluene gas sensors

AU - Karuppasamy, K.

AU - Sharma, Bharat

AU - Vikraman, Dhanasekaran

AU - Jo, Eun Bee

AU - Sivakumar, P.

AU - Kim, Hyun Seok

PY - 2021/12/15

Y1 - 2021/12/15

N2 - Rationally designed gas sensing materials have become essential for modern efficient gas sensor with enhanced performance. This study designed and prepared ordered porous, three-dimensional hierarchical NiFe2O4 (NFO) nanoarchitectures for highly selective and sensitive toluene sensors. Two hierarchical NFO nanostructures including nanospheres and microsphere were fabricated by facile hydrothermal (NFO-Hy) and temperature-programmed calcination (NFO-550), respectively. Physicochemical characterization confirmed structure, composition, and morphology for the as-prepared materials. Nitrogen adsorption-desorption revealed improved surface area and porous properties for NFO-550 compared with NFO-Hy sensing materials, and the NFO-550 sensor achieved the maximum response 5.65 higher than NFO-Hy at optimal operating temperature. Primary analyses for carcinogenic analyte detection suggest NFO as a gas-sensitive material to be potential applicants for real-world toluene gas sensing applications.

AB - Rationally designed gas sensing materials have become essential for modern efficient gas sensor with enhanced performance. This study designed and prepared ordered porous, three-dimensional hierarchical NiFe2O4 (NFO) nanoarchitectures for highly selective and sensitive toluene sensors. Two hierarchical NFO nanostructures including nanospheres and microsphere were fabricated by facile hydrothermal (NFO-Hy) and temperature-programmed calcination (NFO-550), respectively. Physicochemical characterization confirmed structure, composition, and morphology for the as-prepared materials. Nitrogen adsorption-desorption revealed improved surface area and porous properties for NFO-550 compared with NFO-Hy sensing materials, and the NFO-550 sensor achieved the maximum response 5.65 higher than NFO-Hy at optimal operating temperature. Primary analyses for carcinogenic analyte detection suggest NFO as a gas-sensitive material to be potential applicants for real-world toluene gas sensing applications.

KW - Microsphere

KW - Nickel iron oxide

KW - Textural properties

KW - Toluene sensor

KW - Toxic analyte

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SN - 0925-8388

VL - 886

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 161281

ER -

Switchable p-n gas response for 3D-hierarchical NiFe₂O₄ porous microspheres for highly selective and sensitive toluene gas sensors

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Keywords

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