Polypyrrole-bismuth selenide (PPY-Bi2Se3) composite-thermoelectric characterization and effect of nickel doping

Mandal, Pinaki; Maitra, Soumyajit; Chatterjee, Mukulika Jana; Chattopadhyaya, Mausumi; Kargupta, Kajari; Banerjee, Dipali

doi:10.1016/j.synthmet.2022.117119

Cited by 10 publications

(6 citation statements)

References 75 publications

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“…The thermal conductivity (Figure 8d, Table S3) was also measured using a homemade apparatus by applying the current (1.31 A) and measuring the thermal conductance (K), which is related to the thermal conductivity by a linear equation K=A+κB. All samples have similar thermal conductivities ∼0.116 Wm −1 K −1 , which also agrees with other reported values [39,66] . This no significant change may be due to the well‐dispersed MWCNTs‐(COOH) 3 and MWCNTs MWCNTs‐(COOH) 3 ‐NiO in the PPy matrix, through the templating effect, which results in an ordered one‐dimensional nanocomposite.…”

Section: Resultssupporting

confidence: 85%

“…The nanotube morphology of PPy combined with the welldispersed and decorated NiO on MWCNTs sidewall led to an enhancement of TE properties of the overall composites, and the reached value is higher than that reported values in Table 1. [39,40,66,67] This suggests that the TE performances could be tuned by modifying the morphology and controlling the decoration process of metal oxides on MWCNTs. These results at room temperature could be enhanced at higher temperatures.…”

Section: Thermoelectric (Te) Performancementioning

confidence: 99%

“…All samples have similar thermal conductivities ~0.116 Wm À 1 K À 1 , which also agrees with other reported values. [39,66] This no significant change may be due to the welldispersed MWCNTs-(COOH) 3 and MWCNTs MWCNTs-(COOH) 3 -NiO in the PPy matrix, through the templating effect, which results in an ordered one-dimensional nanocomposite. This low value of thermal conductivity is preferred for TE materials.…”

Section: Thermoelectric (Te) Performancementioning

confidence: 99%

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

Bourenane Cherif,

Mekhalif,

Abdous

et al. 2023

ChemNanoMat

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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, ZTPPy‐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.

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Section: Resultssupporting

confidence: 85%

Section: Thermoelectric (Te) Performancementioning

confidence: 99%

Section: Thermoelectric (Te) Performancementioning

confidence: 99%

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

Bourenane Cherif,

Mekhalif,

Abdous

et al. 2023

ChemNanoMat

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“…Assuming acoustic scattering conditions, the room temperature m * S increases from the pristine (m * S = 0.07 m e ) to the highly doped sample (m * S = 1.685 m e ). The increase in the calculated effective mass with doping indicates higher coupling between the electrons and the lattice, leading to reduced µ H and thermal conductivity [40]. The estimated m * S values show an ideal way to characterize the band structure changes, primarily upon the subtle changes caused by doping.…”

Section: Resultsmentioning

confidence: 97%

Eco-Friendly Cerium–Cobalt Counter-Doped Bi2Se3 Nanoparticulate Semiconductor: Synergistic Doping Effect for Enhanced Thermoelectric Generation

Musah,

Or,

Kong

et al. 2023

Nanomaterials

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Metal chalcogenides are primarily used for thermoelectric applications due to their enormous potential to convert waste heat into valuable energy. Several studies focused on single or dual aliovalent doping techniques to enhance thermoelectric properties in semiconductor materials; however, these dopants enhance one property while deteriorating others due to the interdependency of these properties or may render the host material toxic. Therefore, a strategic doping approach is vital to harness the full potential of doping to improve the efficiency of thermoelectric generation while restoring the base material eco-friendly. Here, we report a well-designed counter-doped eco-friendly nanomaterial system (~70 nm) using both isovalent (cerium) and aliovalent (cobalt) in a Bi2Se3 system for enhancing energy conversion efficiency. Substituting cerium for bismuth simultaneously enhances the Seebeck coefficient and electrical conductivity via ionized impurity minimization. The boost in the average electronegativity offered by the self-doped transitional metal cobalt leads to an improvement in the degree of delocalization of the valence electrons. Hence, the new energy state around the Fermi energy serving as electron feed to the conduction band coherently improves the density of the state of conducting electrons. The resulting high power factor and low thermal conductivity contributed to the remarkable improvement in the figure of merit (zT = 0.55) at 473 K for an optimized doping concentration of 0.01 at. %. sample, and a significant nanoparticle size reduction from 400 nm to ~70 nm, making the highly performing materials in this study (Bi2−xCexCo2x3Se3) an excellent thermoelectric generator. The results presented here are higher than several Bi2Se3-based materials already reported.

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“…The structure calculations were done within the Generalized Gradient Approximation (GGA) and using the Perdew-Burke-Ernzerhof (PBE) exchange-correlation functional along with the application of a Hubbard U parameter to account for the localised electronic interactions resulting in an increase in bandgap. [38][39][40][41] A cut-off energy of h488 eVi and 4 Â 4 Â 2 k-points following the Monkhorst-Pack scheme were used in each calculation, with a convergence threshold of 1.0 Â 10 À6 eV per atom for SCF calculations.…”

Section: Theoretical Computationmentioning

confidence: 99%

Selective photo-reduction of CO₂ to methanol using Cu-doped 1D-Bi₂S₃/rGO nanocomposites under visible light irradiation

et al. 2023

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Polypyrrole-bismuth selenide (PPY-Bi2Se3) composite-thermoelectric characterization and effect of nickel doping

Cited by 10 publications

References 75 publications

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

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

Eco-Friendly Cerium–Cobalt Counter-Doped Bi2Se3 Nanoparticulate Semiconductor: Synergistic Doping Effect for Enhanced Thermoelectric Generation

Selective photo-reduction of CO₂ to methanol using Cu-doped 1D-Bi₂S₃/rGO nanocomposites under visible light irradiation

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Polypyrrole-bismuth selenide (PPY-Bi2Se3) composite-thermoelectric characterization and effect of nickel doping

Cited by 10 publications

References 75 publications

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

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

Eco-Friendly Cerium–Cobalt Counter-Doped Bi2Se3 Nanoparticulate Semiconductor: Synergistic Doping Effect for Enhanced Thermoelectric Generation

Selective photo-reduction of CO2 to methanol using Cu-doped 1D-Bi2S3/rGO nanocomposites under visible light irradiation

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Selective photo-reduction of CO₂ to methanol using Cu-doped 1D-Bi₂S₃/rGO nanocomposites under visible light irradiation