Interfacial synthesis and characterization of gold/polyaniline nanocomposites

Bogdanović, Una; Vodnik, Vesna; Ahrenkiel, S. P.; Stoiljković, Milovan; Ćirić‐Marjanović, Gordana; Nedeljković, Jovan M.

doi:10.1016/j.synthmet.2014.05.018

Cited by 47 publications

(53 citation statements)

References 51 publications

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“…52 In addition,~1298,~1237, and~1120 cm −1 were the typical peaks implying the pristine PANI of conducting form. 57 The intensity ratio of the 2 absorption bands at ∼1560 and 1478 cm −1 (I 1560 /I 1478 ) was an indicative of the extent of oxidation state of the polymer, which reflected the relative content of the quinoid diimine and benzene ring structure. 56 X-ray photoelectron spectra characterization for AuNP/PANI is shown in Figure 3 and Figure (Figure S5a).…”

Section: Resultsmentioning

confidence: 99%

In situ polymerization and reduction to fabricate gold nanoparticle‐incorporated polyaniline as supercapacitor electrode materials

Ran

Tan

Dong

et al. 2018

Polymers for Advanced Techs

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Nanocomposites of gold nanoparticles and polyaniline are synthesized by using HAuCl4 and ammonium peroxydisulfate as the co‐oxidant involving in situ polymerization of aniline and in situ reduction of HAuCl4. Through these in situ methods, the synthesized Au nanoparticles of ca. 20 nm embedded tightly and dispersed uniformly in polyaniline backbone. With the Au content in composite increasing from 4.20 to 24.72 wt.%, the specific capacitance of the materials first increased from 334 to 392 F g−1 and then decreased to 298 F g−1. Based on the real content of PANI in composite material, the highest specific capacitance is calculated to be 485 F g−1 at the Au amount of 19.15 wt.%, which remains 55.6% after 5000 cycles at the current density of 2 A g−1. Finally, the asymmetric supercapacitor of AuNP/PANI||AC and the symmetric supercapacitor of AuNP/PANI||AuNP/PANI are assembled. The asymmetric supercapacitor device shows a better electrochemical performance, which delivers the maximum energy density of 7.71 Wh kg−1 with power density of 125 W kg−1 and maximum power density of 2500 W kg−1 with the energy density of 5.35 Wh kg−1.

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Section: Resultsmentioning

confidence: 99%

In situ polymerization and reduction to fabricate gold nanoparticle‐incorporated polyaniline as supercapacitor electrode materials

Ran

Tan

Dong

et al. 2018

Polymers for Advanced Techs

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“…This also demonstrated that the electrostatic attraction taken place during electrodeposition [26]. The bands at 994 cm −1 are assigned to SO 4 2− doped PANI [37]. The intensity of peaks at 2140 cm −1 increased with increasing concentration of NiSO 4 and K 3 Fe(CN) 6 , while the intensity of peaks at 3407 cm −1 decreased.…”

Section: Resultsmentioning

confidence: 66%

One-step electrodeposition of polyaniline/nickel hexacyanoferrate/sulfonated carbon nanotubes interconnected composite films for supercapacitor

Wang

Yang

Zhang

et al. 2015

J Solid State Electrochem

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Sulfonated carbon nanotubes (sCNTs) were prepared by reacting concentrated sulfuric acid with carbon nanotubes (CNTs) on the defect sites. Fourier transform infrared (FTIR) spectroscopy and transmission electron microscopy (TEM) were used to characterize the morphology and structure of sCNTs, respectively. Subsequently, polyaniline (PANI)/nickel hexacyanoferrate (NiHCF)/sCNT interconnected composite films were electrodeposited on the platinum electrode by the one-step co-polymerization using cyclic voltammetry in an aqueous dispersion containing sCNTs. The effect of concentration of NiSO 4 and K 3 Fe(CN) 6 in the prepared solution on the morphology and structure of PANI/NiHCF/sCNTs composite films was studied by scanning electron microscopy (SEM), FTIR spectroscopy, and X-ray diffraction (XRD), respectively. The effect of concentration of NiSO 4 and K 3 Fe(CN) 6 in the prepared solution on polymerization and electrochemical performance was investigated by cyclic voltammetry (CV), galvanostatic charge/ discharge tests, and electrochemical impedance spectroscopy (EIS). One-step electrodeposition mechanism was discussed deeply. It was found that sulfonic acid groups had been attached to surface of CNTs, and sCNTs had higher dispersibility than CNTs in an aqueous dispersion. The morphology of PANI/NiHCF/sCNTs interconnected composite films was remarkably influenced by the concentration of NiSO 4 and K 3 Fe(CN) 6 . The tubular packing structure appeared with the low concentration of NiSO 4 and K 3 Fe(CN) 6 in prepared solution, while the beautiful coral-like interconnected structure exhibited with 0.04 mol L −1 NiSO 4 and 0.04 mol L −1 K 3 Fe(CN) 6 , which was mainly attributed to the π-π* electron stacking effect among sCNTs, NiHCF, and PANI. The specific capacitance and electroactivity of PANI/NiHCF/sCNTs composite films increased markedly with the increase of concentration of NiSO 4 and K 3 Fe(CN) 6 in prepared solution. The specific capacitance of PANI/NiHCF/sCNTs composite film was 430.77 F g −1 with 0.04 mol L −1 NiSO 4 and 0.04 mol L −1 K 3 Fe(CN) 6 due to selfdoping effect of sCNT in composite films. The cycle stability of PANI/NiHCF/sCNTs composite films was enhanced with the increase of NiSO 4 and K 3 Fe(CN) 6 in prepared solution.

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“…33−36 In addition, interaction between exciton located in the quinoid ring of PANI and surface plasmon of CuNPs is also visible as a blue-shift of the SPR band to 550 nm, comparing with the absorption of CuNPs similar size in the range 560−570 nm, observed in our earlier work. 28 In addition to the UV−vis measurement, TEM measurement identified that spherical CuNPs with mean diameter of about 6.0 ± 0.2 nm were formed during the polimerization of aniline ( Figure 2). They are well separated and dispersed homogeneously throughout the polymer matrix.…”

Section: Resultsmentioning

confidence: 99%

“…50 Furthermore, it was observed the presence of phenizene (Phz)-type segments in the PANI as a weak band at 1409 cm −1 ; these segments formed due to the oxidative intramolecular cyclization of branched oligoaniline and PANI chains. 28 The appearance of the intense broad band consisting of two bands at 1010 and 1079 cm −1 can be attributed to N−H stretching vibrations in charged polymer units B−NH + =Q and/ or B−NH +• −B. 28 The IR analysis implies that the electron density of the C−N bond is perturbed by the presence of the CuNPs in the PANI matrix.…”

Section: Resultsmentioning

confidence: 99%

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Nanomaterial with High Antimicrobial Efficacy—Copper/Polyaniline Nanocomposite

Bogdanović

Vodnik

Mitrić

et al. 2015

ACS Appl. Mater. Interfaces

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148

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This study explores different mechanisms of antimicrobial action by designing hybrid nanomaterials that provide a new approach in the fight against resistant microbes. Here, we present a cheap copper-polyaniline (Cu-PANI) nanocomposite material with enhanced antimicrobial properties, prepared by simple in situ polymerization method, when polymer and metal nanoparticles are produced simultaneously. The copper nanoparticles (CuNPs) are uniformly dispersed in the polymer and have a narrow size distribution (dav = 6 nm). We found that CuNPs and PANI act synergistically against three strains, Escherichia coli, Staphylococcus aureus, and Candida albicans, and resulting nanocomposite exhibits higher antimicrobial activity than any component acting alone. Before using the colony counting method to quantify its time and concentration antimicrobial activity, different techniques (UV-visible spectroscopy, transmission electron microscopy, scanning electron microscope, field emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectrophotometry, and inductively coupled plasma optical emission spectrometry) were used to identify the optical, structural, and chemical aspects of the formed Cu-PANI nanocomposite. The antimicrobial activity of this nanocomposite shows that the microbial growth has been fully inhibited; moreover, some of the tested microbes were killed. Atomic force microscopy revealed dramatic changes in morphology of tested cells due to disruption of their cell wall integrity after incubation with Cu-PANI nanocomposite.

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Interfacial synthesis and characterization of gold/polyaniline nanocomposites

Cited by 47 publications

References 51 publications

In situ polymerization and reduction to fabricate gold nanoparticle‐incorporated polyaniline as supercapacitor electrode materials

In situ polymerization and reduction to fabricate gold nanoparticle‐incorporated polyaniline as supercapacitor electrode materials

One-step electrodeposition of polyaniline/nickel hexacyanoferrate/sulfonated carbon nanotubes interconnected composite films for supercapacitor

Nanomaterial with High Antimicrobial Efficacy—Copper/Polyaniline Nanocomposite

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