Interfacial polymerized RGO/MnFe2O4/polyaniline fibrous nanocomposite supported glassy carbon electrode for selective and ultrasensitive detection of nitrite

Sahoo, Saumyaranjan; Sahoo, Pratap K.; Sharma, Abhishek; Satpati, Ashis Kumar

doi:10.1016/j.snb.2020.127763

Cited by 84 publications

(30 citation statements)

References 77 publications

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“…The synthesized nanomaterials of CoFe 2 O 4 and MnFe 2 O 4 , which possess a high ion adsorption capacity of As (III) ions, were convenient for the As (III) adsorption, likewise with an easy recovery with magnetic separation.In the subsequent calculation, a substantial adjustment to both models is discernible (R 2 = 0.99). The maximum adsorption capacity for short times does not change significantly in the Langmuir model, at 222 22. and 105.26, mg/g for CoFe 2 O 4 and MnFe 2 O 4 , respectively.…”

mentioning

confidence: 86%

“…Figure 2a shows the diffraction peaks for the CoFe2O4 sample, located at the 2θ values of 18°, 30°, 36°, 43°, 57°, and 62° with the respective crystal planes (111), (220), (311), (400), (511), and (400), corresponding with the card JCPDS-22-1086 [15]. Figure 2b The size distribution was calculated using ImageJ software, and average sizes of 22 In order to obtain the composition and chemical states of the MNPs, XPS measurements were carried out. As a result, the full survey spectra of CoFe2O4 and MnFe2O4 confirm the presence of Co, Fe, Mn, and O elements, as shown in Figure A1.…”

Section: Characterization Of Cofe2o4 and Mnfe2o4 Nanoparticlesmentioning

confidence: 99%

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Ferrous Magnetic Nanoparticles for Arsenic Removal from Groundwater

Morales-Amaya

Alarcón-Herrera

Astudillo-Sánchez³

et al. 2021

Water

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Arsenic in water is currently a global concern due to the long-term exposure that could affect human health. In this study, magnetic nanoparticles (MNPs), CoFe2O4, and MnFe2O4 were successfully synthesized and applied to remove arsenic (As) from water. The MNPs were characterized using different techniques, such as scanning electron microscope (SEM), Brunauer–Emmet–Teller (BET), and photoelectron spectroscopy (XPS). The nanoscale size and the specific surface area achieved a fast, selective, and high As adsorption capacity. MNPs have a mesoporous structure with a mean pore diameter of 5 nm and a mean particle size of 30 nm. The adsorption capacity of these MNPs was determined through kinetic and equilibrium experiments, multilayer adsorption that obeyed the Freundlich model equation was observed, and the maximum adsorption capacities reached were 250 mg/g for CoFe2O4 and 230 mg/g for MnFe2O4. Furthermore, MNPs characteristics like regeneration and reuse, several pH tolerances, non-ion interference, and effective As removal from groundwater samples confirms the nanomaterials’ potential for future applications in water treatment systems combined with magnetic separation.

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confidence: 86%

Section: Characterization Of Cofe2o4 and Mnfe2o4 Nanoparticlesmentioning

confidence: 99%

Ferrous Magnetic Nanoparticles for Arsenic Removal from Groundwater

Morales-Amaya

Alarcón-Herrera

Astudillo-Sánchez³

et al. 2021

Water

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“…N 1s signals for PANi/rGO film can be deconvoluted to assign benzenoid amine -NH-(399.3 eV) and cationic radical N + (401.3 eV). [14,43,44] The first peak relevant to amine group is located at higher binding energy compared to neutral amine (at 399.5 eV), [37] indicating the occurence of partially charged nitrogen in electrodeposited polymer chains. The second peak is typical for PANi at doped state.…”

Section: Morphological and Structural Behaviors Of Pani/rgo/spementioning

confidence: 99%

Acetylcholinesterase sensor based on PANi/rGO film electrochemically grown on screen‐printed electrodes

Thanh

Nga²,

Lam

et al. 2021

Vietnam Journal of Chemistry

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In this work, the polyaniline/reduced graphene oxide (PANi/rGO) bilayer was directly electrodeposited on carbon screen‐printed electrodes (SPE). Some details in growth of PANi/rGO bilayer were revealed from cyclic voltammograms and X‐ray photoelectron spectra. The growth of stacked rGO film at high compactness on the electrode surface is mainly accompanied with reduction of epoxy functional groups at basal planes of graphitic flakes. The as‐grown rGO layer with abundent hydroxyl functional groups at basal planes is preferable to attract intrinsic fibrillar‐like PANi polymer chains in protonated aqueous media. The as‐prepared PANi/rGO hybrid bilayer has shown good conductivity, high porosity, good adhesion to biomolecules, and fast electron transfer rate (increased by 3.8 times). Herein, PANi/rGO film has been further utilized to develop disposable acetylcholinesterase sensors able to detect acetylthiocholine (ATCh) with apparent Michaelis ‐ Menten constant of 0.728 mM. These sensors provide a very promising technical solution for in‐situ monitoring acetylthiocholine level in patients with neuro‐diseases and determination of neuro‐toxins such as sarin and pesticides.

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“…The EIS technique usually performs to study the electron transfer kinetics at the surface of the fabricated electrodes in electrochemical sensors. Generally Nyquist plots consist of two sections, a semi-circle at higher frequencies which its diameter is equal to the amount of charge transfer resistance and a linear section at lower frequencies [32]. Figure 3b represents the Nyquist plots of the electrodes that mentioned above.…”

Section: Electrocatalytic Performance Of Modified Electrodesmentioning

confidence: 99%

Voltammetric Detection of Nitrite Anions Employing Imidazole Functionalized Reduced Graphene Oxide as an Electrocatalyst

Tajiki

Abdouss

Sadjadi³

et al. 2020

Electroanalysis

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A kind of metal free catalyst with excellent electrocatalytic activity toward nitrite anions oxidation was synthesized through functionalization of graphene oxide (GO) with imidazole aromatic rings. Imidazole rings linked to graphene oxide nanosheets via 3-chloropropyl trimethoxysilane (CPTMS) mediators following simultaneous thermally reduction of GO during the functionalization, to form rGOÀ Im for modification of gold electrode (GE). The sensing platform characterized by SEM, XRD, IR and Raman methods. The resulting rGOÀ Im-GE sensor, responded sensitively to nitrite concentrations within a wide linear range (1 to 1000 μM) and indicated a relative low detection limit (LOD = 0.28 μM, S/N = 3) without interfering with common ions existing in aqueous media. Furthermore acceptable recoveries were obtained when applying the proposed sensor to tap water samples.

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Interfacial polymerized RGO/MnFe2O4/polyaniline fibrous nanocomposite supported glassy carbon electrode for selective and ultrasensitive detection of nitrite

Cited by 84 publications

References 77 publications

Ferrous Magnetic Nanoparticles for Arsenic Removal from Groundwater

Ferrous Magnetic Nanoparticles for Arsenic Removal from Groundwater

Acetylcholinesterase sensor based on PANi/rGO film electrochemically grown on screen‐printed electrodes

Voltammetric Detection of Nitrite Anions Employing Imidazole Functionalized Reduced Graphene Oxide as an Electrocatalyst

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