Stable and robust nanobiocomposite preparation using aminated guar gum (mimic activity of graphene) with electron beam irradiated polypyrrole and Ce-Ni bimetal: Effective role in simultaneous sensing of environmental pollutants and pseudocapacitor applications

Dhananjayan, Nathiya; Muthukumaran, P.; Wilson, J.; Gurunathan, K.

doi:10.1016/j.electacta.2017.06.075

Cited by 17 publications

(9 citation statements)

References 49 publications

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“…These data have the limitation of being spatially averaged through the film. Structure is most commonly expressed via external film morphology, represented by AFM and SEM topographic imaging [35,36,37]; simultaneous compositional analysis using EDX is common, particularly for polymer/metal composites [38]. While interesting, particularly for templated materials [39], these provide no insight into internal film structure and ex situ imaging cannot reflect solvation.…”

Section: Introductionmentioning

confidence: 99%

Effect of electrochemical control function on the internal structure and composition of electrodeposited polypyrrole films: A neutron reflectometry study

Beebee

Watkins

Sapstead

et al. 2019

Electrochimica Acta

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Electrodeposited conducting polymer films derived from aromatic monomers are known to possess properties that depend significantly on the deposition protocol, particularly the electrochemical control function employed. This study explores the underlying reasons for this common observation for the specific case of polypyrrole films deposited from aqueous media onto gold electrodes under potentiostatic, potentiodynamic and galvanostatic control. Although the control functions impose different conditions, the control parameters (potential, potential range and scan rate, and current) were selected so as generate films at comparable rates; this avoids inappropriate attribution of structural and compositional variations to different thickness regimes, irrespective of how they were generated. In each case, film deposition was periodically interrupted and the film characterised by specular neutron reflectivity measurements. By using d 4pyrrole monomer in H 2 O solvent, the isotopic selectivity of neutron reflectivity was used to extract polymer and solvent concentration profiles as a function of distance from the electrode/film interface. Spatial integration of these profiles was used to quantify total film solvent populations; these are expressed as solvent volume fractions. Films grown under the three different control regimes have measurably distinct solvent volume fraction profiles and there is evolution of these profiles with increasing thickness. Ultimately, for the conditions employed, the order of increasing porosity (i.e. solvent content) by control function was potentiostatic < potentiodynamic < galvanostatic. At the end of the deposition process, the films were transferred to monomer-free electrolyte and redox cycled. This resulted in an overall increase in film solvation, but little difference in solvation with redox state (doping level). We conclude that film structure and associated solvation level do retain some memory of deposition protocol, but also respond to the medium of exposure.

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Section: Introductionmentioning

confidence: 99%

Effect of electrochemical control function on the internal structure and composition of electrodeposited polypyrrole films: A neutron reflectometry study

Beebee

Watkins

Sapstead

et al. 2019

Electrochimica Acta

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“… 27,42 In addition, the hydrogen bonds may also be developed between the surface adsorbed analytes and their aqueous dissolved species. 43 The rings of CNTs can offer additional π–π interactions to the benzene unit of DHBIs via solute–sorbent interactions to boost their regional concentration and enhance electrocatalytic redox events ( Scheme 2 ). Moreover, metal NPs exert their electrocatalytic role for the oxidation of the DHBIs via metal nuclei active sites and the mechanism follows conventional heterogeneous catalysis process as reported by the previous investigators.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, metal NPs exert their electrocatalytic role for the oxidation of the DHBIs via metal nuclei active sites and the mechanism follows conventional heterogeneous catalysis process as reported by the previous investigators. 25,43 The combined effect of all the above mentioned interactions giving rise to a sensitive electrochemical scaffold for the discrimination and concurrent sensing of all the three isomers has been portrayed in Scheme 2.…”

Section: Optimization Of Conditions and Working Principle Of The Nanosensormentioning

confidence: 99%

Phenolic water toxins: redox mechanism and method of their detection in water and wastewater

et al. 2021

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“…In our previous work, we reported the stabilizing as well as sensing platform of guar gum, negative polysaccharide upon to amine modification in primary hydroxyl groups 27 . In continuation, we hereby report the studies on interaction of EB-PPy/MGA, its selective non-enzymatic determination towards Tyr (Fig.…”

Section: Introductionmentioning

confidence: 99%

Interactive Studies on Synthetic Nanopolymer decorated with Edible Biopolymer and its Selective Electrochemical determination of L-Tyrosine

Dhananjayan

Wilson

Gurunathan

2019

Sci Rep

Self Cite

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Herein, an edible biopolymer amine Modified Gum Acacia (MGA), successfully encumbered with Electron Beam irradiated Polypyrrole Nanospheres (EB-PPy NSs), was investigated for the effective role in L-Tyrosine (Tyr) biosensing application. The morphology of EB-PPy NSs decorated MGA (EB-PPy/MGA) hybrid nanobiocomposite has been studied by Scanning electron microscopy and its affirmed interactions were characterized by X-ray diffraction, Raman, FT-IR spectroscopy, UV-Visible spectroscopy, Thermo Gravimetric Analysis and Vibrating Sample Magnetometer. The hybrid nanobiocomposite manifested diamagnetic behavior with reduced saturation magnetization (Ms = 1.412 × 10−4 emu/g) to produce more adhesive surface. Amine chains in EB-PPy NSs and hydroxyl groups of MGA contributed to effective immobilization, thus enabling suitable orientation for Tyr determination. The electrochemical analysis illustrated that the proposed nanobiocomposite based sensor exhibited an excellent electrocatalytic activity toward selective determination of Tyr in the linear range of 0.4 to 600 µM with a lower detection limit of 85 nM, low oxidation potential of 0.72 V and good selectivity. Finally, the reliability of the constructed EB-PPy/MGA for Tyr detection was demonstrated in real samples.

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Stable and robust nanobiocomposite preparation using aminated guar gum (mimic activity of graphene) with electron beam irradiated polypyrrole and Ce-Ni bimetal: Effective role in simultaneous sensing of environmental pollutants and pseudocapacitor applications

Cited by 17 publications

References 49 publications

Effect of electrochemical control function on the internal structure and composition of electrodeposited polypyrrole films: A neutron reflectometry study

Effect of electrochemical control function on the internal structure and composition of electrodeposited polypyrrole films: A neutron reflectometry study

Phenolic water toxins: redox mechanism and method of their detection in water and wastewater

Interactive Studies on Synthetic Nanopolymer decorated with Edible Biopolymer and its Selective Electrochemical determination of L-Tyrosine

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