Metal–polymer nanocomposites based on Ni nanoparticles and polythiophene obtained by electrochemical method

Pascariu, Petronela; Airinei, Anton; Grigoraş, Mircea; Vacareanu, Loredana; Iacomi, Felicia

doi:10.1016/j.apsusc.2015.03.063

Cited by 32 publications

(9 citation statements)

References 35 publications

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“…Quite generally, this requires physicochemical attributes that are not possessed by a single material: hybrid materials provide one approach to exploiting this, particularly if they combine organic and inorganic materials at an intimate level using nanoscale material. The value of this approach is exemplified by organic/inorganic hybrid assemblies based on the combination of CPs with, for example, metal nanoparticles [4], carbon nanostructures [5,6] and inorganic compounds [7]. Combination of CPs with metal oxide semiconductors constitute, undoubtedly, one of the most promising classes [8,9], since they combine the elasticity and functionality of the CPs with the high thermal and chemical stabilities of metal oxides [10].…”

Section: Introductionmentioning

confidence: 99%

Novel hybrid based on a poly[Ni( salen )] film and WO 3 nanoparticles with electrochromic properties

Nunes

Moura

Hillman

et al. 2017

Electrochimica Acta

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The strategy of combining electroactive polymers and inorganic nanomaterials has been widely explored in recent years in order to improve some of their properties, namely electrocatalysis and electrochromism. This report focuses on a new composite prepared through the electropolymerization of the transition metal complex ], designated as [1], in the presence of WO3 nanoparticles (NPs) and its electrochromic (EC) performance. The WO3 NPs were prepared using tungsten metal powder; their characterization indicated quasi-spherical morphology, high crystallinity and particle sizes in the range 30 -40 nm. The nanocomposite WO3@poly[1] films displayed similar electrochemical responses to those of pristine poly[1] films in LiClO4/CH3CN, but higher electroactive surface coverages, an advantage of NPs incorporation in the nanocomposite.The presence of the WO3 NPs in the poly[1] matrix was assessed by X-ray photoelectron spectroscopy and scanning electronic microscopy. The nanocomposite presented similar electronic spectra to those of poly [1], indicating that the electronic structure of the pristine film is maintained in the nanocomposite, but exhibited lower ε-values for bands associated with charge transfer transitions for high oxidised states, revealing an enhanced stability towards ligand over-oxidation.The WO3@poly[1] nanocomposite showed more favourable EC properties in LiClO4/CH3CN than the pristine film. For typical coverages (Γ = 0.06-0.10 µmol cm -2 ) the composite showed lower switching times (τ = 1.3 -3.6 s), higher optical contrast (∆T ≈ 31 %, an improvement of ca. 40 %) and better colouration efficiencies (in the range η = 104 -115 cm 2 C -1 , improvement of ca. 13 -22 %).(cathodic EC material) [23,24]. These properties make it an attractive "partner" for CPs (or other electroactive polymers) in hybrid materials for EC applications. In fact, several EC nanocomposites based in the incorporation of WO3 nanostructures into CP matrices, such as polyaniline (PANI) [23][24][25][26][27] and poly(3,4-ethylenedioxythiophene) (PEDOT)[28], have already been reported, exploiting the complementary EC attributes of WO3 and CPs. In general, CPs exhibit interesting optical properties, with rich colour changes due to their multiple redox states, but have low colour switching rates due to the slow transport of charge balancing counter ions ("dopants") into the polymer layer. On the other hand, metal oxide nanostructures have high surface-to-volume ratio and organized structures that facilitate ion/electron intercalation processes and promote switching reversibility [10,29]. Thus, the resultant nanocomposites promise the advantage of synergistic influence of the WO3 on the EC properties of conducting polymer, presenting improved EC properties with more satisfactory switching speeds and colouration efficiencies [23,25,27].The poly[M(salen)]-type films (M ≡ transition metal) are a particular class of electroactive metallopolymers, derived from metal salen complexes, recently studied by their interesting EC behavior [30,31]. Th...

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Section: Introductionmentioning

confidence: 99%

Novel hybrid based on a poly[Ni( salen )] film and WO 3 nanoparticles with electrochromic properties

Nunes

Moura

Hillman

et al. 2017

Electrochimica Acta

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“…They have proved that the electrical conductivity of the composites increased from 4.5 × 10 −3 cm −1 to 1.25 × 10 −2 cm −1 as the amount of nickel was increased from 0.43% up to 1.3% and polythiophene-Ni nanocomposites exhibiting a good electrical conductivity response [14]. Ganga Raju Achary et al have reported of study of electrical properties of nickel doped polyurethane nanocomposites.…”

Section: Introductionmentioning

confidence: 95%

Metallopolymer Nanocomposites Based on PP/Ni: Structure and Electrophysical Properties

Рамазанов

Hajiyeva

2019

Acta Phys. Pol. A

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The polymer nanocomposite structures based on isotactic polypropylene and nickel nanoparticles were obtained and studied by scanning electron microscopy, UV-Vis, FT-IR, and dielectric spectroscopy. IR studies show that the introduction of nickel nanoparticles into the polypropylene matrix does not change the chemical structure of the polymer, that is, nickel nanoparticles are not in the chemical, but in physical interaction with the polymer. It is also shown that as the frequency increases, the value of the permittivity of the nanocomposite based on PP/Ni does not change, and this is due to the lack of polarization processes. The value of the dielectric loss tangent depends on the Ni concentration with an extremum, that is, with an increase in the content of Ni nanoparticles, the value of the dielectric loss tangent decreases and at a content of 3% Ni in the polymer, the value of tan δ is minimal and a further increase in the concentration leads to an increase in the dielectric loss tangent. A sharp decrease in the resistivity at 383 K, 413 K, and 423 K, respectively, for the nanocomposites PP/3% Ni, PP/5% Ni, and PP/10% Ni is explained by the destruction of the crystalline phase of the polymer and the increase in electrical conductivity of the nanocomposites.

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“…The dispersion of ferromagnetic metal nanoparticles in a polymer matrix is of great interest due to the combined effect of the magnetic and electric properties of the individual elements. Nanocomposites prepared using conducting polymer and ferromagnetic metal nanoparticles such as polythiophene-nickel by electrochemical method exhibited good electrical conductive response [10]. Increase of saturation magnetization and decrease in electrical conductivity with respect to Fe content were noted for polyaniline-Fe nanocomposites [11].…”

Section: Introductionmentioning

confidence: 97%

Studies on Conduction Mechanism, Magnetization and Electrochemical Properties of Polythiophene-Cobalt Nanocomposites

Chandraprabha¹,

Sankarappa²,

Lokhande³

et al. 2018

JNST

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Polythiophene (PTh) was prepared by chemical oxidation and cobalt nanoparticles (Co-nps) by modified polyol process. The nanocomposites were prepared by mixing mechanically the PTh and Co-nps in the weight percentage, PTh100-xCox, x = 10, 20, 30, 40 and 50. XRD of these nanocomposites showed amorphous nature. DC conductivity variation with temperature in the range from 303 K to 473 K indicated semiconducting behavior. Conduction mechanism was found to be small polaron hopping at high temperature and 3D variable range hopping at low temperatures. Conductivity and activation energy values points out that addition of Co-nps to the PTh induces electrically insulating effect. The SQUID magnetometer measurements at 10 K and 300 K showed perfect ferromagnetic nature and magnetically softness of the composites. Cyclic voltammetry study has been carried out on all the composites and in that a composite having 30% of Co-nps measured Specific Capacitance (SC) value as high as 583.20 F/g. This can be the best candidate for capacitor applications. This is for the first time that PTh-Co nanocomposites have been thoroughly probed for structure, conduction mechanism, magnetization and supercapacitor applications.

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Metal–polymer nanocomposites based on Ni nanoparticles and polythiophene obtained by electrochemical method

Cited by 32 publications

References 35 publications

Novel hybrid based on a poly[Ni( salen )] film and WO 3 nanoparticles with electrochromic properties

Novel hybrid based on a poly[Ni( salen )] film and WO 3 nanoparticles with electrochromic properties

Metallopolymer Nanocomposites Based on PP/Ni: Structure and Electrophysical Properties

Studies on Conduction Mechanism, Magnetization and Electrochemical Properties of Polythiophene-Cobalt Nanocomposites

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