Measuring the Electrical and Photonic Properties of Cobalt Oxide-Containing Composite Carbon Fibers

Yong X Gan,Jeremy B Gan

doi:10.3390/jcs4040156

Yong X Gan, Jeremy B Gan

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https://doi.org/10.3390/jcs4040156

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In this work, cobalt acetate was incorporated into polyacrylonitrile (PAN) polymer through electrospinning as the cobalt oxide source. After oxidization and pyrolysis, a PAN-derived composite carbon fiber containing cobalt oxide was obtained. Measuring the electrical and photonic properties of the composite fiber under visible light irradiation was performed to evaluate the photoelectric behavior of the composite fiber. The p-type semiconducting behavior of the composite fiber was confirmed by measuring the open circuit voltage of a photochemical fuel cell consisting of the photosensitive electrode made from the composite fiber. The application of the composite fiber for glucose sensing was demonstrated.

Highlights

Oxide-containing composite fibers have been widely researched for various applications including photocatalysis [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18], antibacterial action [19], light emitting [20,21,22,23,24,25,26,27], optical and dielectric constant tuning [28], photovoltaics [29,30], sensing [31,32,33] and energy storage [34]
In Reference [35], a spray pyrolysis technique was used to make nanostructured Co3O4; the cobalt oxide (Co3O4) nanofibers were deposited onto a glass substrate by spraying cobalt acetate Co(CH3COO)2·4H2O precursor solution
The objective of this work was to convert cobalt acetate incorporated in polyacrylonitrile (PAN) to cobalt oxide to interrogate the photoelectrical behavior of the composite carbon fiber

Summary

Introduction

Oxide-containing composite fibers have been widely researched for various applications including photocatalysis [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18], antibacterial action [19], light emitting [20,21,22,23,24,25,26,27], optical and dielectric constant tuning [28], photovoltaics [29,30], sensing [31,32,33] and energy storage [34]. Patel et al [36] measured the thermal electric response of the co-electrospun cobalt oxide particle containing carbon nanofiber heated by a hot air gun. A strong electrical potential peak was generated indicating the thermoelectric response from the cobalt oxide containing carbon composite fiber. The objective of this work was to convert cobalt acetate incorporated in polyacrylonitrile (PAN) to cobalt oxide to interrogate the photoelectrical behavior of the composite carbon fiber. Co-electrospinning the polymer and the cobalt salt mixture was performed to obtain the precursor for the composite fiber. Oxidization and pyrolysis of the precursor was carried out to generate a PAN-derived composite carbon fiber containing cobalt oxide. The innovative part of this work lies in researching new composite fiber materials for flexible sensing component fabrication because the carbon fiber is highly compliant. DMF was used as the solvent for making the PAN polymer solution and the cobalt acetate solution

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