Hierarchical 3D micro flower-like Co3O4 structures for NO2 detection at room temperature

Manjeet Kumar; Vishwa Bhatt; Ju Hyung Yun

doi:10.1016/j.physleta.2020.126477

Hierarchical 3D micro flower-like Co₃O₄ structures for NO₂ detection at room temperature

Manjeet Kumar
, Vishwa Bhatt
, Ju Hyung Yun

Department of Chemical and Biochemical Engineering

Incheon National University

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

36 Scopus citations

Abstract

Micro flowers-like Co₃O₄ structures have been synthesized by a low-cost single-step hydrothermal route. The XRD pattern and Raman spectra confirmed the cubic crystal structure of Co₃O₄ and FESEM images displayed that the synthesized Co₃O₄ attained a flower-like morphology. The higher sensor response ∼22% was recorded for hierarchical 3D flower-like Co₃O₄ structures at room temperature for 60 ppm NO₂ exposure with response (recovery) time of the order of ∼25 (70) s respectively. The flower-like Co₃O₄ structures attained a reversible, highly stable and selective response towards NO₂ at room temperature.

Original language	English
Article number	126477
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	384
Issue number	19
DOIs	https://doi.org/10.1016/j.physleta.2020.126477
State	Published - 2 Jul 2020

Keywords

CoO microflowers
NO sensor
Rietveld refinement

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10.1016/j.physleta.2020.126477

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title = "Hierarchical 3D micro flower-like Co3O4 structures for NO2 detection at room temperature",

abstract = "Micro flowers-like Co3O4 structures have been synthesized by a low-cost single-step hydrothermal route. The XRD pattern and Raman spectra confirmed the cubic crystal structure of Co3O4 and FESEM images displayed that the synthesized Co3O4 attained a flower-like morphology. The higher sensor response ∼22\% was recorded for hierarchical 3D flower-like Co3O4 structures at room temperature for 60 ppm NO2 exposure with response (recovery) time of the order of ∼25 (70) s respectively. The flower-like Co3O4 structures attained a reversible, highly stable and selective response towards NO2 at room temperature.",

keywords = "CoO microflowers, NO sensor, Rietveld refinement",

author = "Manjeet Kumar and Vishwa Bhatt and Yun, \{Ju Hyung\}",

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AU - Kumar, Manjeet

AU - Bhatt, Vishwa

AU - Yun, Ju Hyung

PY - 2020/7/2

Y1 - 2020/7/2

N2 - Micro flowers-like Co3O4 structures have been synthesized by a low-cost single-step hydrothermal route. The XRD pattern and Raman spectra confirmed the cubic crystal structure of Co3O4 and FESEM images displayed that the synthesized Co3O4 attained a flower-like morphology. The higher sensor response ∼22% was recorded for hierarchical 3D flower-like Co3O4 structures at room temperature for 60 ppm NO2 exposure with response (recovery) time of the order of ∼25 (70) s respectively. The flower-like Co3O4 structures attained a reversible, highly stable and selective response towards NO2 at room temperature.

AB - Micro flowers-like Co3O4 structures have been synthesized by a low-cost single-step hydrothermal route. The XRD pattern and Raman spectra confirmed the cubic crystal structure of Co3O4 and FESEM images displayed that the synthesized Co3O4 attained a flower-like morphology. The higher sensor response ∼22% was recorded for hierarchical 3D flower-like Co3O4 structures at room temperature for 60 ppm NO2 exposure with response (recovery) time of the order of ∼25 (70) s respectively. The flower-like Co3O4 structures attained a reversible, highly stable and selective response towards NO2 at room temperature.

KW - CoO microflowers

KW - NO sensor

KW - Rietveld refinement

UR - https://www.scopus.com/pages/publications/85083815967

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DO - 10.1016/j.physleta.2020.126477

M3 - Article

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VL - 384

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

IS - 19

M1 - 126477

ER -

Hierarchical 3D micro flower-like Co₃O₄ structures for NO₂ detection at room temperature

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Keywords

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