Characterization and electrochemical studies on poly(1-naphthylamine)-graphene oxide nanocomposites prepared by in situ chemical oxidative polymerization

Saidu, Femina Kanjirathamthadathil; Joseph, Alex; Varghese, Eldhose V.; Thomas, George V.

doi:10.1007/s10008-019-04380-9

Cited by 9 publications

(4 citation statements)

References 38 publications

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“…PNA was synthesized by adding APS to the solution of NA in 1 M HCl by following the method described in our previous work [55]. Accurately weighed amount of bulk WS 2 powder was transferred into 100 mL of 1 M HCl solution in a beaker and ultra-sonicated for an hour using a probe sonicator.…”

Section: Preparation Of Pna-ws 2 Nanocompositesmentioning

confidence: 99%

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Saidu

Thomas

2020

SN Appl. Sci.

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Here, novel poly(1-naphthylamine)-tungsten disulphide (PNA-WS 2 ) nanocomposites were synthesized through an in-situ chemical oxidative polymerization of 1-naphthylamine in the presence of ultrasonically dispersed WS 2 . The effect of WS 2 addition on the optoelectrical, morphological and thermal properties of PNA was studied by using different analytical tools. SEM images revealed that PNA aggregates are well supported on the dispersed WS 2 sheets. The formation of a fibrous network of PNA over the dispersed WS 2 layers evidenced from the TEM images has suggested larger surface area and better interfacial interaction between PNA and incorporated WS 2 layers . The thermal stability was improved upon the incorporation of WS 2 . Optical bandgap values of PNA-WS 2 nanocomposites were lower than that of bulk WS 2 and pristine PNA. Electrical and dielectric studies have confirmed an improvement in conductivity and dielectric properties with increasing WS 2 content, which was credited to the better charge transport between the polar backbone of PNA and charged surface of dispersed WS 2 due to enhanced interfacial area and electrostatic interactions between the components. A maximum AC conductivity of 4.4 × 10 -3 Sm −1 was displayed by nanocomposite containing 20% WS 2 loading and a further increase in WS 2 content showed a detrimental effect in electrical and dielectric properties. The present study has demonstrated that optical and dielectric properties of composites can be readily tuned by proper control of the composition and dispersion of WS 2 within the PNA matrix.

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Section: Preparation Of Pna-ws 2 Nanocompositesmentioning

confidence: 99%

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Saidu

Thomas

2020

SN Appl. Sci.

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“…Figure 2 shows the FTIR spectrum of the as-prepared PNA. The peak observed at 3413 cm −1 was due to the hydrogen-bonded N-H stretching vibration, and another sharp peak at 767 cm −1 was noted for polymerization of 1-naphthylamine monomer to PNA [28,30,32]. The imine stretching was observed at 1639 cm −1 [31].…”

Section: Ftir Studiesmentioning

confidence: 92%

“…Moreover, these polymers have low solubility in typical organic solvents. Compared to many aniline derivatives, PNA has a wide range of applications, such as gas sensing, photocatalysis and energy storage, due to its unique electrical characteristics [28][29][30][31][32][33][34]. Hence, researchers have turned their focus to polymerization of 1-naphthylamine (1-NPA) monomer with fused benzene linked to aniline.…”

Section: Introductionmentioning

confidence: 99%

Poly(1-Napthylamine) Nanoparticles as Potential Scaffold for Supercapacitor and Photocatalytic Applications

Umar

Rosaline³

et al. 2022

Micromachines

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Herein, we explore the supercapacitor and photocatalytic applications of poly(1-naphthylamine) (PNA) nanoparticles. The PNA nanoparticles were synthesized by using polymerization of 1-naphthylamine and characterized with several techniques in order to understand the morphological, structural, optical and compositional properties. The structural and morphological properties confirmed the formation of crystalline nanoparticles of PNA. The Fourier-transform infrared (FTIR) spectrum revealed the successful polymerization of 1-naphthylamine monomer to PNA. The absorption peaks that appeared at 236 and 309 nm in the UV–Vis spectrum for PNA nanoparticles represented the π–π* transition. The supercapacitor properties of the prepared PNA nanoparticles were evaluated with cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) methods at different scan rates and current densities, respectively. The effective series resistance was calculated using electrochemical impedance spectroscopy (EIS), resulting in a minimum resistance value of 1.5 Ω. The highest specific capacitance value of PNA was found to be 255 Fg−1. This electrode also exhibited excellent stability with >93% capacitance retention for 1000 cycles, as measured at 1A g−1. Further, the prepared PNA nanoparticles were used as an effective photocatalyst for the photocatalytic degradation of methylene blue (MB) dye, which exhibited ~61% degradation under UV light irradiation. The observed results revealed that PNA nanoparticles are not only a potential electrode material for supercapacitor applications but also an efficient photocatalyst for the photocatalytic degradation of hazardous and toxic organic dyes.

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“…CV and electrochemical impedance spectroscopy (EIS) measurements were taken at room temperature in a uniformly mixed solution of 1 M KOH. The specific capacitance was calculated from CV curves using equation (1) [35,36].…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Ethylenediamine-assisted growth of multi-dimensional ZnS nanostructures and study of its charge transfer mechanism on supercapacitor electrode and photocatalytic performance

et al. 2020

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In recent years, much interest has been raised by materials with multi-purpose characteristics as the performance of electrochemical energy devices such as supercapacitors and photocatalytic activities depend strongly on the properties of materials. This study delineates various parameters like morphology, energy band gap, charge transfer resistance, different defect states, diffusion coefficient and functional groups adsorbed on the surface of material to assess the performance of supercapacitor electrodes and photocatalytic degradation efficiency of synthesised multi-dimensional ZnS nanostructures. Ethylenediamine (EN)-mediated multi-dimensional ZnS nanostructures were grown by the solvothermal route. One-dimensional (1D), 2D and 3D morphologies were obtained by varying the ratio of de-ionised water and EN, taken as 1:3, 1:2 and 1:1, respectively. The EN molecules effectively capped most of the surfaces of the ZnS nanoparticles formed, preventing agglomeration of nanoparticles due to the decrement in surface energy. The oriented attachment of these clusters resulted in the formation of 1D, 2D and 3D morphologies. The plausible chemistry in the formation of 1D, 2D and 3D nanostructures has been elaborated. Charge transfer properties of prepared electrodes have been examined using the electrochemical impedance spectroscopy (EIS) technique because better charge transfer causes diminishing electron/hole recombination and hence better photodegradation efficiency. Among the synthesised materials, the 2D nanostructure degraded the eosin Y dye to maximum 90.71% efficiency with rate constant 34 × 10−3 min−1. 2D nanostructures possess better charge transfer and hence better photodegradation efficiency. Various studies using methods of UV-vis, Fourier-transform infrared, Brunauer–Emmett–Teller, x-ray photoelectron spectroscopy and photoluminescence spectra are in good agreement with the obtained photodegradation results. After analysing cyclic voltammetry curves and EIS, a higher diffusion coefficient is obtained for 1D nanostructure material, hence a higher specific capacitance and higher energy density of 159.12 F g−1 and 22.75 KWh kg−1 are found in this case. Only 9% loss of specific capacitance is found after 1000 cycles, showing a relatively high cycling stability in 3D nanostructures. The excellent supercapacitive property can be attributed to the porous structure and high specific surface area. Thus, the synthesised multi-dimensional ZnS nanostructures are proved to be a potential candidate for both photocatalytic and supercapacitor electrode performance.

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Characterization and electrochemical studies on poly(1-naphthylamine)-graphene oxide nanocomposites prepared by in situ chemical oxidative polymerization

Cited by 9 publications

References 38 publications

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Synthesis, characterization and dielectric studies of poly(1-naphthylamine)–tungsten disulphide nanocomposites

Poly(1-Napthylamine) Nanoparticles as Potential Scaffold for Supercapacitor and Photocatalytic Applications

Ethylenediamine-assisted growth of multi-dimensional ZnS nanostructures and study of its charge transfer mechanism on supercapacitor electrode and photocatalytic performance

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