In-Situ Chemical Synthesis, Microstructural, Morphological and Charge Transport Studies of Polypyrrole-CuS Hybrid Nanoco
- PDF / 1,496,819 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 28 Downloads / 169 Views
In‑Situ Chemical Synthesis, Microstructural, Morphological and Charge Transport Studies of Polypyrrole‑CuS Hybrid Nanocomposites Narinder Singh1 · Manish Taunk1 Received: 8 June 2020 / Accepted: 9 September 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Hybrid nanocomposites (HNCs) of polypyrrole (PPy) and CuS were synthesized by an in situ chemical polymerization method. The HNCs were prepared by varying the CuS nanoparticles weight percentage (10–40%) in PPy matrix. The XRD and FESEM characterization indicated the uniform distribution of CuS nanoparticles in PPy matrix. The XRD pattern revealed the presence of hexagonal CuS peaks overlapped with amorphous PPy pattern. Williamson Hall method was employed to estimate intrinsic strain in HNCs. FTIR spectrum revealed the shifting of 1025 cm−1 peak toward higher wavenumber, indicating insertion of CuS nanoparticles in PPy. The room temperature electrical conductivity of PPy is found to be increased from 1.15 × 10−1 to 3.70 S/cm as the content of CuS nanoparticles increases up to 40 wt% in HNCs. To explore the charge transport mechanism in HNCs,the conductivity was measured in the temperature range of 300–15 K. The measured conductivity data was analyzed with the help of Arrhenius model and 3d Mott’s variable range hopping (VRH) model in the temperature range of 35–300 K. The approximate values of Mott’s parameters at 300 K such as the density of states at Fermi level, average hopping distance and average hopping energy of HNCs were estimated as ~ 4×1024 cm−3eV−1, ~ 1.7 Å and ~ 10 meV respectively. Keywords CuS · Williamson Hall plot · Hybrid nanocomposites · Polypyrrole · Electrical transport · Variable range hopping
1 Introduction Conducting polymer-based hybrid nanocomposites (HNCs) have attracted much attention of researches worldwide because they often possess unique properties that are not available with their bulk counterparts [1]. HNCs contain both organic and inorganic components where at least one of them is in the nanometric size domain. The properties of hybrid materials are not the mere combination of individual components but result from the strong synergy created by a very large hybrid interface [2]. Among organic materials polypyrrole (PPy) is widely studied because of room temperature synthesis, low-cost processing, environmental stability, excellent conductivity, higher capacitance, mechanical flexibility, tunable electronic properties, etc. [3]. In recent years, HNCs of polypyrrole (PPy) and transition metal-based * Manish Taunk [email protected] 1
Department of Physics, Indus International University, Una, Himachal Pradesh 174303, India
inorganic components such as NiO, CuO, ZnO, W O3, Fe3O4 Cr2O3, ZnS, CdS, CuSe, SnO2, TiO2, WS2, Ag, are being explored to find potential applications in various fields such as electromagnetic shielding, energy electrodes, energy storage applications, supercapacitors, corrosion resistance coatings, electronic devices, sensors, photocatalysis etc. [4–17]. Among tran
Data Loading...
