Mechanistic Insights into the Synthesis of Nickel-Graphene Nanostructures for Gas Sensors.

Autor: Hsuan Joseph Sung C; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA., Gong BY; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA., Yu H; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA., Ede SR; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA., Cruz L; Materials Science and Engineering Program, University of California, Riverside, CA, 95251, USA., Fang H; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA., Sarmiento E; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA., Zang W; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA., Barrows GL; Centeye Inc., 4905 Reno Road NW, Washington, D.C., 20008, USA., Kisailus D; Department of Materials Science and Engineering, University of California, Irvine, CA, 92697, USA.
Jazyk: angličtina
Zdroj: Small methods [Small Methods] 2024 May 19, pp. e2400245. Date of Electronic Publication: 2024 May 19.
DOI: 10.1002/smtd.202400245
Abstrakt: Toxic gases are used in different types of industries and thus, present a potential health hazard. Therefore, highly sensitive gas sensing materials are essential for the safety of those operating in their environments. A process involving electrospinning polymer solutions impregnated with transition metal ions are developed to yield nanofibers that are annealed to form graphitic carbon / nickel nanoparticle-based fibers for gas sensing applications. The performance of these gas sensors is strongly related to the ability to control the material parameters of the active material. As the formation of these nanostructures, which nucleate within solid carbon scaffolds, have not been investigated, the growth mechanisms are look to understand in order to exert control over the resulting material. Evaluation of these growth mechanisms are conducted through a combination of thermogravimetric analysis with mass spectrometry (TGA-MS), x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and x-ray photoelectron spectroscopy (XPS) and reveal nucleation of nickel at the onset of the polymer scaffold decomposition with subsequent growth processes, including surface diffusion, aggregation, coalescence and evaporation condensation, that are activated at different temperatures. Gas sensing experiments conducted on analyte gases demonstrate good sensitivity and response times, and significant potential for use in other energy and environmental applications.
(© 2024 The Authors. Small Methods published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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