Construction of CNT-MgO-Ag-BaO Nanocomposite with Enhanced Field Emission and Hydrogen Sensing Performances

CNTs and CNT-MgO, CNT-MgO-Ag, and CNT-MgO-Ag-BaO nanocomposites were grown on alloy substrates using an electrophoretic deposition method and their field emission (FE) and hydrogen sensing performances were investigated. The obtained samples were characterized by SEM, TEM, XRD, Raman, and XPS charac...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Vol. 13; no. 5; p. 885
Main Authors: Liu, Xingzhen, Qian, Weijin, Chen, Yawei, Dong, Mingliang, Yu, Taxue, Huang, Weijun, Dong, Changkun
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 27.02.2023
MDPI
Subjects:
Barium compounds
Barium oxides
Chemical vapor deposition
CNT-MgO-Ag-BaO nanocomposite
Composite materials
Diffraction
Electric properties
Electrodes
Electrophoretic deposition
Emission analysis
Emissions
Ethanol
Field emission
Heat conductivity
Hydrogen
hydrogen sensing
Investigations
Magnesium oxide
Nanocomposites
Nanoparticles
Nanotubes
Optical properties
Raman spectroscopy
Scanning electron microscopy
Silver
Spectrum analysis
stability
Stainless steel
Substrates
tensile test
Thermal conductivity
Work functions
X ray photoelectron spectroscopy
X-ray spectroscopy
X-rays
China
United States > US
Japan
electrophoretic deposition
tensile test
CNT-MgO-Ag-BaO nanocomposite
hydrogen sensing
field emission
stability
ISSN:2079-4991, 2079-4991
Online Access:Get full text
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Description
Summary:CNTs and CNT-MgO, CNT-MgO-Ag, and CNT-MgO-Ag-BaO nanocomposites were grown on alloy substrates using an electrophoretic deposition method and their field emission (FE) and hydrogen sensing performances were investigated. The obtained samples were characterized by SEM, TEM, XRD, Raman, and XPS characterizations. The CNT-MgO-Ag-BaO nanocomposites showed the best FE performance with turn-on and threshold fields of 3.32 and 5.92 V.μm−1, respectively. The enhanced FE performances are mainly attributed to the reductions of the work function, and the enhancement of the thermal conductivity and emission sites. The current fluctuation of CNT-MgO-Ag-BaO nanocomposites was only 2.4% after a 12 h test at the pressure of 6.0 × 10−6 Pa. In addition, for the hydrogen sensing performances, the CNT-MgO-Ag-BaO sample showed the best increase in amplitude of the emission current among all the samples, with the mean IN increases of 67%, 120%, and 164% for 1, 3, and 5 min emissions, respectively, under the initial emission currents of about 1.0 μA.
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ISSN:2079-4991
2079-4991
DOI:10.3390/nano13050885