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dc.contributor.authorSalah, Numan
dc.contributor.authorAlhebshi, Nuha
dc.contributor.authorSalah, Yousef N.
dc.contributor.authorAlshareef, Husam N.
dc.contributor.authorKoumoto, Kunihito
dc.date.accessioned2020-12-17T06:59:39Z
dc.date.available2020-12-17T06:59:39Z
dc.date.issued2020-12-16
dc.date.submitted2020-09-30
dc.identifier.citationSalah, N., Alhebshi, N. A., Salah, Y. N., Alshareef, H. N., & Koumoto, K. (2020). Thermoelectric properties of oil fly ash-derived carbon nanotubes coated with polypyrrole. Journal of Applied Physics, 128(23), 235104. doi:10.1063/5.0031438
dc.identifier.issn0021-8979
dc.identifier.issn1089-7550
dc.identifier.doi10.1063/5.0031438
dc.identifier.urihttp://hdl.handle.net/10754/666432
dc.description.abstractOil fly ash has been reported to be suitable for producing low-cost carbon nanotubes (CNTs). These CNTs exhibit zigzag curved walls with an almost bamboo-like structure. Owing to this structure, these CNTs exhibit very low thermal conductivity as compared to other graphitic carbon materials. They also exhibit relatively low electrical conductivity. However, they exhibit a Seebeck coefficient comparable to that of commercially available CNTs. Therefore, it is of great importance to evaluate the thermoelectric (TE) properties of oil fly ash-derived CNTs. In this study, the TE properties of oil fly ash-derived CNTs were investigated. The CNTs were further coated with polypyrrole (PPy) to enhance their TE performance. PPy was used for the modification because of its attractive TE properties and its suitability as a binder for CNTs. The PPy coating significantly enhanced the electrical conductivity of the CNTs from ∼500 to ∼1300 S/m at room temperature. A small increase in the Seebeck coefficient was also observed. The power factor value increased from 0.1 to 0.6 μW/m K2. At 440 K, the power factor value was 1.4 μW/m K2. The thermal conductivity of the CNTs (∼1 W/m K) decreased significantly by a factor of 10 after the modification with PPy. The power generation characteristics of a single leg module made up of the p-type coated CNTs were investigated under real-time conditions in air. The results demonstrated the potential of the oil fly ash-derived CNTs coated with PPy for applications as TE materials.
dc.description.sponsorshipThis joint project was co-funded by the King Abdulaziz University (KAU), Jeddah, and King Abdullah University of Science and Technology (KAUST), Thuwal, under Grant No. JP-19-002. The authors, therefore, acknowledge KAU and KAUST for their technical and financial support.
dc.publisherAIP Publishing
dc.relation.urlhttp://aip.scitation.org/doi/10.1063/5.0031438
dc.rightsThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Journal of Applied Physics and may be found at http://doi.org/10.1063/5.0031438.
dc.rights.uriPublished under license by AIP Publishing.
dc.titleThermoelectric properties of oil fly ash-derived carbon nanotubes coated with polypyrrole
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Applied Physics
dc.rights.embargodate2021-12-16
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionCenter of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia
dc.contributor.institutionPhysics Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
dc.contributor.institutionDepartment of Chemical and Materials Engineering, Faculty of Engineering, King Abdulaziz University, Rabigh 21911, Saudi Arabia
dc.contributor.institutionNagoya Industrial Science Research Institute, Nagoya 464-0819, Japan
dc.identifier.volume128
dc.identifier.issue23
dc.identifier.pages235104
kaust.personAlshareef, Husam N.
dc.date.accepted2020-11-24
refterms.dateFOA2020-12-17T07:00:42Z


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