Structural and Optical Properties of Polypyrrole/NiO Doped Nanocomposites

Abstract

This study reports the synthesis of polypyrrole/NiO doped nanocomposites (NCs) as a shielding pigment in organic coatings. Polypyrrole/NiO doped NCs were prepared by in-situ chemical oxidative polymerization of pyrrole monomer. Here dopant NiO nanoparticles (NPs) were synthesized by solution combustion method using Aloe vera gel as fuel with ammonium per sulphate (APS) as oxidant. Different concentrations of NiO (10-50 wt%) NPs were incorporated into the polypyrrole. The synthesized nanocomposites were characterized by means of powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The size of the NPs were calculated by Scherer method, and found to be around 20 nm. TEM results are in consistent with the XRD results. The morphology of the obtained composites shows the porous and agglomerated particles which are due to large amount of gas evolution during NPs synthesis by solution combustion method and optical properties were studied.

Synthesis and characterization of polypyrrole composites: Optimization strategies for tailored material qualities and enhanced applications

“…The dopant helps modify the electronic properties of PPy, making it more suitable for certain applications where enhanced conductivity is desired. The precise chemical details of this interaction may vary based on the conditions and the specific structural characteristics of the Iron (III) Tosylate used in the reaction (Bhadra et [2,3,8,11] .…”

Insights into properties, synthesis and emerging applications of polypyrrole-based composites, and future prospective: A review

“…Bora et al studied the optical properties of PPy/Graphene composites. They reported the optical band gap of PPy and PPy/Graphene composites, as given in Table 3 , using the following equation [ 170 ]. E opt g is the optical band gap, and λ edge is the absorption edge [ 146 ].…”

“…Inamdar et al synthesized PPy/NiO-doped nanocomposites by in situ polymerization and studied their optical properties using diffuse reflectance spectra (DRS). The energy band gap (E g ) was found to be 1.84 and was determined using Kubelka-Munk (K-M) theory [ 170 ]. Tarmizi et al synthesized the PPy/zeolite composite using the chemical oxidation method to improve the physical properties of PPy [ [171] , [172] , [173] , [174] ].…”

One-step electrodeposition of a polypyrrole/NiO nanocomposite as a supercapacitor electrode

“…NiO is a promising pseudocapacitive electrode due to its high capacity and stability. On the other hand, the performance of NiO electrodes is poor due to their low conductivity 17 , 18 . In this study, a new nanocomposite of Ppy/NiO electrodes were fabricated via one–step facile electrochemical deposition method at different currents onto the surface of graphite sheet.…”