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Open AccessArticle

Impact of Synthesis Parameters of Multi-Walled Carbon Nanotubes on their Thermoelectric Properties

1
Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, B. Krzywoustego 4, 44-100 Gliwice, Poland
2
Centre of Polymer and Carbon Materials Polish Academy of Sciences, M. Curie-Sklodowskiej 34, 41-819 Zabrze, Poland
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(21), 3567; https://doi.org/10.3390/ma12213567
Received: 23 September 2019 / Revised: 28 October 2019 / Accepted: 29 October 2019 / Published: 30 October 2019
(This article belongs to the Special Issue Electrical, Thermal and Optical Properties of Nanocarbon Materials)
Carbon nanotubes have been intensively researched for many years because of a wide array of promising properties that they have. In this paper, we present the impact of synthesis parameters on thermoelectric properties of nanocarbon material. We conducted a number of syntheses of multi-walled carbon nanotubes (MWCNTs) at different temperatures (800 and 900 °C) using various amounts of catalyst (2%, 5.5%, and 9.6%) to facilitate the process. We also tested the influence of injection rate of precursor and the necessity of material purification on thermoelectric properties of MWCNTs. The electrical conductivity, thermal conductivity, and Seebeck coefficient were measurement for all samples. Based on these parameters, the values of Power Factor and Figure of Merit were calculated. The results show that the most important parameter in the context of thermoelectric properties is purity of employed MWCNTs. To obtain appropriate material for this purpose optimum synthesis temperature and appropriate content of the catalyst must be selected. The study also reveals that post-synthetic purification of nanocarbon is essential to produce an attractive material for thermoelectrics. View Full-Text
Keywords: carbon nanotubes; thermoelectric properties; Seebeck coefficient carbon nanotubes; thermoelectric properties; Seebeck coefficient
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MDPI and ACS Style

Kumanek, B.; Stando, G.; Wróbel, P.S.; Janas, D. Impact of Synthesis Parameters of Multi-Walled Carbon Nanotubes on their Thermoelectric Properties. Materials 2019, 12, 3567.

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