Development of an Innovative Nitrite Sensing Platform Based on the Construction of an Electrochemical Composite Sensor of Polymer Coated CNTs and Decorated with Magnetite Nanoparticles

Atta, Nada F.; Galal, Ahmed M.; Ahmed, Yousef M.; Abdelkader, Mohamed G.

doi:10.1002/elan.202060598

Cited by 13 publications

(6 citation statements)

References 52 publications

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“…DL and QL are determined according to (S/N = 3). 46 The performance of the sensor for TFLP detection is compared with other cited modied sensors. 2,3,37,44,[47][48][49] The sensor offers reasonable linear range for TFLP detection, DL lower than other used modied electrodes with good stability and accuracy as illustrated in ESI Table 2.…”

Section: Robustnessmentioning

confidence: 99%

Electrochemical sensor for simultaneous determination of trifluoperazine and dopamine in human serum based on graphene oxide–carbon nanotubes/iron–nickel nanoparticles

Ahmed,

Eldin,

Galal

et al. 2023

RSC Adv.

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Section: Robustnessmentioning

confidence: 99%

Electrochemical sensor for simultaneous determination of trifluoperazine and dopamine in human serum based on graphene oxide–carbon nanotubes/iron–nickel nanoparticles

Ahmed,

Eldin,

Galal

et al. 2023

RSC Adv.

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“…[32][33][34][35][36][37][38] CNTs modified with different materials reported in the literature for electrochemical sensing of different compounds. [39][40][41][42][43][44] Beta cyclodextrin (β-CD) molecule has a cylinder-shape; the presence of hydroxyl groups at the outer surface of the molecule is responsible for its hydrophilic character while the inner surface is hydrophobic in nature. [45,46] The cyclodextrin's cylindrical shape allows the guest molecule to be kept within the hydrophobic interior while the exterior of the cyclodextrin is hydrophilic and soluble in aqueous phase.…”

Section: Introductionmentioning

confidence: 99%

Synergistically Enhanced Electrochemical Sensing of Bisphenol A in Real Water Samples at Carbon Nanotubes/β‐Cyclodextrin/Gold Nanoparticles Composite

Atta,

Abdelkader,

Hamed

et al. 2023

ChemistrySelect

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Monitoring of bisphenol A (BPHA) is required as its release with byproducts into the aquatic environment every year, causes pollution and toxicity which affects the human health. An efficient electrochemical sensor is therefore needed to determine BPHA in water from natural resources. To construct the sensor, a thin layer of carbon nanotubes (CNTs) is applied to the surface of glassy carbon (GC) then β‐CD and Aunano are sequentially electrodeposited. The performance of the sensor is optimized and shows excellent catalytic effect in wide concentration range 7 nM to 700 μM with low detection limit of 5.02 nM compared to other cited modified electrodes. Each of the sensor constituents share in the enhancement of its performance; Aunano has intrinsic surface electroactivity, β‐CD “host” allows for BPHA “guest” surface accumulation, and CNTs with large conductive surface area realize homogeneous distribution of the other two components. The advantages of the BPHA electrochemical sensor are simple to prepare, timesaving, and shows good sensitivity, stability, selectivity in presence of interfering ions and compounds, it is suitable for use with portable simple equipment for in situ measurements. Furthermore, the application of the sensor in wastewater samples shows good recovery of BPHA.

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“…Several published studies have reported the design and synthesis of such MOF-based composites for electrochemical purposes, and a range of conducting polymers including polyaniline (PANI), − poly(3,4-ethylenedioxythiophene) (PEDOT), − polypyrrole, − and polythiophene have been utilized as the conductive materials. Among these conducting polymers, PEDOT has been reported as the active material for electrochemical nitrite sensors. − We thus reasoned that the nanocomposite consisting of a highly porous and electrocatalytic porphyrinic Zr-MOF and the conductive PEDOT should further enhance the sensing performances of both pristine materials toward nitrite.…”

Section: Introductionmentioning

confidence: 99%

Selectively Confined Poly(3,4-Ethylenedioxythiophene) in the Nanopores of a Metal–Organic Framework for Electrochemical Nitrite Detection with Reduced Limit of Detection

Tsai

Wang

Chen

et al. 2022

ACS Appl. Nano Mater.

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Poly(3,4-ethylenedioxythiophene) (PEDOT) selectively generated in the nanopores of a zirconium-based porphyrinic metal–organic framework (MOF), NU-902, is synthesized by in situ polymerization with the coexistence of MOF crystals and excessive poly(sodium 4-styrenesulfonate) (PSS) followed by the successive washing steps to remove the well-dispersed PEDOT:PSS from the MOF-based solid. For comparison, PEDOT-NU-902 composite with PEDOT solely present between MOF crystals and that containing both pore-confined PEDOT and interparticle PEDOT are also synthesized by physical blending method and the in situ polymerization without adding PSS, respectively. Crystallinity, morphology, porosity, and electrochemical behavior of these PEDOT-NU-902 composites are investigated. Since both PEDOT and the porphyrinic linkers of NU-902 are active electrocatalysts for nitrite oxidation, these composites along with the pristine NU-902 and PEDOT are applied for electrochemical nitrite sensors in aqueous electrolytes. The composite with PEDOT solely confined within the MOF pores can effectively reduce the nonfaradaic current originating from PEDOT while achieving a moderate catalytic faradaic current for nitrite, which results in its smallest limit of detection (LOD) for nitrite determination compared to other PEDOT-NU-902 composites and the pristine materials. The electrochemical nitrite sensor based on pore-confined PEDOT achieves a sensitivity of 133 μA/mM cm2, a linear range of up to 1.6 mM, and a LOD of 1.71 μM. By utilizing nitrite detection as a proof-of-concept demonstration here, the findings suggest the unique role of the pore-confined conducting polymers within structurally rigid MOFs in electrochemical sensors and shed the light on the design and applications of such nanocomposites for a range of electroanalytical purposes.

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Development of an Innovative Nitrite Sensing Platform Based on the Construction of an Electrochemical Composite Sensor of Polymer Coated CNTs and Decorated with Magnetite Nanoparticles

Cited by 13 publications

References 52 publications

Electrochemical sensor for simultaneous determination of trifluoperazine and dopamine in human serum based on graphene oxide–carbon nanotubes/iron–nickel nanoparticles

Electrochemical sensor for simultaneous determination of trifluoperazine and dopamine in human serum based on graphene oxide–carbon nanotubes/iron–nickel nanoparticles

Synergistically Enhanced Electrochemical Sensing of Bisphenol A in Real Water Samples at Carbon Nanotubes/β‐Cyclodextrin/Gold Nanoparticles Composite

Selectively Confined Poly(3,4-Ethylenedioxythiophene) in the Nanopores of a Metal–Organic Framework for Electrochemical Nitrite Detection with Reduced Limit of Detection

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