Nickel Oxide Decorated MWCNTs Wrapped Polypyrrole: One Dimensional Ternary Nanocomposites for Enhanced Thermoelectric Performance

Younes BOURENANE CHERIF, Zineb Mekhalif, Slimane Abdous, Linda Nedjar, Ahmed Mekki, Zakaria Bekkar Djelloul Sayah, Souleymen Rafai

Research output: Contribution to journalArticlepeer-review

Abstract

This study reports on a customized and revised approach to fabricate “nickel oxide decorated multi-walled carbon nanotubes (MWCNTs) wrapped polypyrrole (PPy)” nanocomposite with enhanced room-temperature thermoelectric (TE) properties. The nanocomposite is formed through three steps: MWCNTs functionalization via diazonium salt grafting of 5-amino-1,2,3-benzene tricarboxylic acid; in situ generation on their surfaces of NiO nanoparticles with a homogenous distribution; the chemical polymerization of pyrrole using methyl orange as templating and dopant to wrap the MWCNTs-(COOH) 3-NiO. Various techniques were used as characterization tools, including XRD, TEM, FTIR, Raman, TGA, XPS, and TE measurements. The PPy-MWCNTs-(COOH) 3-NiO nanocomposite exhibits significantly higher Seebeck coefficient, electrical conductivity, and power factor than PPy and PPy-MWCNTs-(COOH) 3. The achieved enhancement in TE properties (figure of merit, ZT PPy-MWCNTs-(COOH)3-NiO=1.51×10 −2) is attributed to the presence of NiO, which acts as a dopant and improves the charge carrier density in the nanocomposite. These results offer the potential for waste heat recovery and large-scale fabrication of high-performance composites.

Original languageEnglish
Article numbere202300486
JournalChemNanoMat
Volume10
Issue number3
DOIs
Publication statusPublished - 15 Dec 2023

Keywords

  • figure of merit
  • functionalized MWCNTs
  • nickel oxide
  • polypyrrole nanotubes
  • thermoelectric properties

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