Carbon nanotube–polyaniline nanotube core–shell structures for electrochemical applications

Ramana, G. Venkata; Srikanth, Vadali V. S. S.; Padya, Balaji; Jain, Pawan

doi:10.1016/j.eurpolymj.2014.05.018

Cited by 65 publications

(16 citation statements)

References 25 publications

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“…The patterns of all NCs generally have the same behavior as CPA. The existence of the crystalline peak at 26° with higher intensity in NCs is due to the overlapping of CPA and graphitic materials which appear at CNMs, and this will result in an enhancement of long‐range conjugation and denotes improvement of π ‐ π interchain‐stacking 60‐61 . The appearance of these peaks is ascribed to the formation of the core‐shell structure of CNMs ‐CPA, and this is compatible with SEM and TEM analysis as we will see later.…”

Section: Resultssupporting

confidence: 76%

Fabrication of conductive cross‐linked polyaniline/G‐MWCNTS core‐shell nanocomposite: A selective sensor for trace determination of chlorophenol in water samples

Katowah

Mohammed

Al‐Eryani

et al. 2020

Polymers for Advanced Techs

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The nanocomposites (NCs) of cross-linked polyaniline (CPA) with a variety of carbon nanomaterials (CNMs) (CPA/CNMs NCs) was prepared by the chemical oxidative copolymerization of PANI and p-phenylenediamine (PPDA) with triphenylamine (TPA) in the presence of CNMs. The results of XRD, FTIR and Raman indicated that the CPA/CNMs NCs were effectively synthesized with strong interactions among the constituents. The morphology study demonstrated that CNMs were well coated by CPA and produce a well-aligned nanorod core-shell structure with the large surface area which may be more beneficial to electrical conductivity when used as electrode materials. Differential thermal analysis techniques (TGA-DTG) were used to characterize the thermal stability of NCs. The heat of formation of CPA monomer from TPA, PPDA and aniline (ANI) were computed using Density Functional Theory (DFT) calculations. The NCs of G-MWCNTs demonstrate higher affinity to oxidation of Chlorophenols (CPHs) than glassy carbon electrode (GCE), CPA/GCE and the other NCs. Differential pulse voltammetry (DPV) was used for the trace determination of 2,4-dichlorophenol (2,4-DCP). Under the optimum conditions, the peak current of 2,4-DCP was proportional to its concentration in the range of 0.05-0.6 μmol/L. The detection limit was 7.6 nmol/L. The method was successfully applied for the determination of 2,4-DCP in fish farm water with satisfactory recoveries. The suggested method has an advantage to be used for water samples due to its short analytical time, rapid response, high sensitivity, and excellent selectivity with good reproducibility. K E Y W O R D S 2,4-dichlorophenol sensor, crosslinked polyaniline/G-MWCNTS nanocomposite, density functional theory, electrochemical properties, thermal properties 1 | INTRODUCTION Conducting polymer (CPs) based sensors have the advantages of the processability of environmental, simplicity, high electrical conductivity, mechanical flexibility as well as low cost 1-2 P.ANI in many applications has appeared as one of the most promising CPs materials. 3-6 PANI composites have been used in the fabrication of diverse devices, such as thermoelectric and energy storage devices, biofuel cells and batteries. 7-16 However, the electrochemical applications are the most promising application of these composites. Particularly, in many electroanalytical studies, the fabrication of PANI and PANI composite electrochemical sensors has become a common way and offers high selectivity as well as sensitivity to detect target molecules. 17-19 Crosslinking may be a candidate to enhance the PANI electrical and

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Section: Resultssupporting

confidence: 76%

Fabrication of conductive cross‐linked polyaniline/G‐MWCNTS core‐shell nanocomposite: A selective sensor for trace determination of chlorophenol in water samples

Katowah

Mohammed

Al‐Eryani

et al. 2020

Polymers for Advanced Techs

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“…Carbon nanotubes (CNTs) are one of the most used supporting materials for PANI, created by coating PANI on its surface as core/shell nanocomposites in order to improve the cycling stability of PANI. With the pristine CNTs as support, the cycling stability of PANI is far from desirable [ 13 , 14 ], although it was higher than the pure PANI materials. However, the specific capacitance retention could achieve about 90% when the functionalized CNTs were used [ 15 , 16 ], mainly due to the interaction between PANI and the functionalized CNTs.…”

Section: Introductionmentioning

confidence: 99%

Crosslinked Carbon Nanotubes/Polyaniline Composites as a Pseudocapacitive Material with High Cycling Stability

et al. 2015

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The poor cycling stability of polyaniline (PANI) limits its practical application as a pseudocapacitive material due to the volume change during the charge-discharge procedure. Herein, crosslinked carbon nanotubes/polyaniline (C-CNTs/PANI) composites had been designed by the in situ chemical oxidative polymerization of aniline in the presence of crosslinked carbon nanotubes (C-CNTs), which were obtained by coupling of the functionalized carbon nanotubes with 1,4-benzoquinone. The composite showed a specific capacitance of 294 F/g at the scan rate of 10 mV/s, and could retain 95% of its initial specific capacitance after 1000 CV cycles. Such high electrochemical cycling stability resulting from the crosslinked skeleton of the C-CNTs makes them potential electrode materials for a supercapacitor.

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“…The presence of a crystalline peak in all NCs at approximately 26˚with a higher intensity is due to the overlapping peaks of CPA and graphitic materials in the OXCNMs. Consequently, this enhances longrange conjugation and improves π-π inter chain stacking [26,27]. In addition, the appearance of these peaks indicates the formation of the core-shell structure of the CPA-OXCNMs, as evidenced by the SEM image.…”

Section: Ethics Statementmentioning

confidence: 90%

Rapid and sensitive electrochemical sensor of cross-linked polyaniline/oxidized carbon nanomaterials core-shell nanocomposites for determination of 2,4-dichlorophenol

et al. 2020

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Nanocomposites (NCs) of crosslinked polyaniline (CPA)-coated oxidized carbon nanomaterials (OXCNMs) were fabricated as a very sensitive and simple electrochemical sensor to be utilized in 2,4-dichlorophenol (2,4-DCPH) detection. CPA/OXCNMs NCs were prepared by chemical copolymerization of polyaniline with triphenylamine and p-phenylenediamine in the presence of OXCNMs. The CPA/GO-OXSWCNTNCs exhibited a higher affinity for the oxidation of chlorophenols compared to the glassy carbon electrode (GCE), CPA/GCE, and other NCs. Cyclic voltammetry was performed to investigate and assess the electrocatalytic oxidation of 2,4-DCPH on the modified GCE. The compound yielded a well-defined voltammetric response in a Britton-Robinson buffer (pH 5) at 0.54 V (vs. silver chloride electrode). Quantitative determination of 2,4-DCPH was performed by differential pulse voltammetry under optimal conditions in the concentration range of 0.05 to 1.2 nmol L-1 , and a linear calibration graph was obtained. The detection limit (S/N = 3) was found to be 4.2 nmol L-1. In addition, the results demonstrated that the CPA/GO-OXSWCNTs/GCE sensor exhibited a strong anti-interference ability, reproducibility, and stability. The prepared CPA/GO-OXSWCNTs/GCE sensor was used to rapidly detect 2,4-DCPH with a high degree of sensitivity in fish farm water with proven levels of satisfactory recoveries.

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Carbon nanotube–polyaniline nanotube core–shell structures for electrochemical applications

Cited by 65 publications

References 25 publications

Fabrication of conductive cross‐linked polyaniline/G‐MWCNTS core‐shell nanocomposite: A selective sensor for trace determination of chlorophenol in water samples

Fabrication of conductive cross‐linked polyaniline/G‐MWCNTS core‐shell nanocomposite: A selective sensor for trace determination of chlorophenol in water samples

Crosslinked Carbon Nanotubes/Polyaniline Composites as a Pseudocapacitive Material with High Cycling Stability

Rapid and sensitive electrochemical sensor of cross-linked polyaniline/oxidized carbon nanomaterials core-shell nanocomposites for determination of 2,4-dichlorophenol

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