Copper nanowires / poly (naphtoquinone chromium (III)) for simultaneous voltammetric detection of para - aminophenol, phenol and para - nitrophenol

Hashemzaei, Zahra; Saravani, Hamideh; Sharifitabar, M.; Shahbakhsh, Mehdi

doi:10.1016/j.microc.2022.107210

Cited by 5 publications

(5 citation statements)

References 89 publications

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“…Figure S6, Supplementary Materials). Recent studies [27][28][29][30]32,37,[40][41][42]74] have demonstrated that the LOD for 2-NP and 4-NP resides in the nM range (Table S2). The concentration sensitivity of the modified working electrode materials suggests that Ag@P-CA could be effective as a sensor material as well as an electrocatalyst for the detection/oxidation of 2-NP and 4-NP.…”

Section: Cyclic Voltammetry (Cv)mentioning

confidence: 99%

“…Porous materials are generally thought to be good adsorbents that play an important role in improving adsorptive separations or purification [24]. Various methods [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] are used for the detection of nitrophenols (Table S1; Supporting Materials). Among these methods, electrochemical strategies aimed at chemical transformation of the nitrophenols via oxidation or reduction processes are feasible.…”

Section: Introductionmentioning

confidence: 99%

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Electrocatalytic Oxidation of Nitrophenols via Ag Nanoparticles Supported on Citric-Acid-Modified Polyaniline

Khani

Sammynaiken²,

Wilson

2023

Catalysts

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Citric-acid-modified polyaniline (P-CA) and P-CA modified with Ag nanoparticles (Ag@P-CA) were prepared via an in situ reduction method. The physicochemical properties of P-CA and Ag@P-CA were compared to unmodified polyaniline (PANI) and PANI-modified Ag nanoparticles (Ag@PANI). Ag@P-CA had a lower content of aniline oligomers compared to Ag@PANI. P-CA and Ag@P-CA had a greater monolayer adsorption capacity for 2-nitrophenol and lower binding affinity as compared to PANI and Ag@PANI materials. X-ray photoelectron spectroscopy and cyclic voltammetry characterization provided reason and evidence for the higher conductivity of citric-acid-modified materials (P-CA and Ag@P-CA versus PANI and Ag@PANI). These results showed the potential utility for the optimization of adsorption/desorption and electron transfer steps during the electrochemical oxidation of nitrophenols. The oxidation process employs Ag@P-CA as the electrocatalyst by modifying polyaniline with Ag nanoparticles and citric acid, which was successfully employed to oxidize 2-nitrophenol and 4-nitrophenol with comparable selectivity and sensitivity to their relative concentrations. This work is envisaged to contribute significantly to the selective conversion of nitrophenols and electrocatalytic remediation of such waterborne contaminants.

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Section: Cyclic Voltammetry (Cv)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Oxidation of Nitrophenols via Ag Nanoparticles Supported on Citric-Acid-Modified Polyaniline

Khani

Sammynaiken²,

Wilson

2023

Catalysts

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“…However, the nanofibrous membranes possessed nanomaterials, and all of the nanofibrous membranes exhibited uniform fiber diameter distribution sizes of 350–550 nm. The planar structure indicated that successful cross-linking had taken place during thermal treatment, and it was observed that increasing thermal treatment resulted in an increase in the surface area of the planar surface [ 32 , 33 ]. A significant difference in the morphologies of the nanofibrous membranes could clearly be observed, but the fiber diameters were different for all of the nanofibrous materials.…”

Section: Resultsmentioning

confidence: 99%

“…Since the Ag-NPs were synthesized in aqueous solution with several hydroxyl functional groups at the surface of the nanofibers, the microenvironment of the Ag-NP aqueous solution was neutral, and was therefore able to form hydrogen bonds. On the other hand, nanofiber membranes also include many extra carboxyl groups on their surface and can be accepted in large quantities by CMC molecules [ 32 , 33 ]. Therefore, Ag-NPs with numerous hydroxyl groups were readily able to anchor and agglomerate onto the surface of the fabricated nanofibers, primarily because of hydrogen bonding.…”

Section: Resultsmentioning

confidence: 99%

Self-Assembled Nanofibrous Membranes by Electrospinning as Efficient Dye Photocatalysts for Wastewater Treatment

Al-Arjan

2023

Polymers

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Water pollution has become a leading problem due to industrial development and the resulting waste, which causes water contamination. Different materials and techniques have been developed to treat wastewater. Due to their self-assembly and photocatalytic behavior, membranes based on graphene oxide (GO) are ideal composite materials for wastewater treatment. We fabricated composite membranes from polylactic acid (PLA) and carboxylic methyl cellulose (CMC)/carboxyl-functionalized graphene oxide (GO-f-COOH) using the electrospinning technique and the thermal method. Then, a nanofibrous membrane (PLA/CMC/GO-f-COOH@Ag) was produced by loading with silver nanoparticles (Ag-NPs) to study its photocatalytic behavior. These membranes were characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) in order to investigate the behavior of the fabricated membranes. The degradation kinetics studies were conducted using mathematical models, such as the pseudo first- and second-order models, by calculating their regression coefficients (R2). These membranes exhibited exceptional dye degradation kinetics. The R2 values for pseudo first order were PCGC = 0.983581, PCGC@Ag = 0.992917, and the R2 values for pseudo second order were PCGC = 0.978329, PCGC@Ag = 0.989839 for methylene blue. The degradation kinetics of Rh-B showed R2 values of PCGC = 0.973594, PCGC@Ag = 0.989832 for pseudo first order and R2 values of PCGC = 0.994392, PCGC@Ag = 0.998738 for pseudo second order. The fabricated nanofibrous membranes exhibited a strong π-π electrostatic interaction, thus providing a large surface area, and demonstrated efficient photocatalytic behavior for treating organic dyes present in wastewater. The fabricated PLA/CMC/GO-f-COOH@Ag membrane presents exceptional photocatalytic properties for the catalytic degradation of methylene blue (MB) dye. Hence, the fabricated nanofibrous membrane would be an eco-friendly system for wastewater treatment under catalytic reaction.

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“…[23][24][25] To enhance the performance of CPE, various modifiers can be added to the electrode. Many types of modified CPE have been fabricated and used to improve the sensitivity and stability of sensors, using different nanomaterials such as carbon nanotubes, 26,27 metal nanoparticles, 28 metal organic frameworks, 29 conductive polymers, 30 nanowires, 31 quantum dots (QDs), 32 magnetic nanoparticles, 33 and gold nanoparticles (AuNPs). 34 Among these nanomaterials, carbon nanotubes (CNTs) and AuNPs are the most widely explored ones because of their exceptional properties, which can be applied in various fields, such as sensing, detection, and imaging.…”

mentioning

confidence: 99%

A Sensitive Electrochemical DNA Biosensor for Determination of Anti-Cancer Drug Gemcitabine Based on an AuNPs/MWCNTs/Carbon Paste Electrode

Mohammadi,

Rafati,

Bagheri

2023

J. Electrochem. Soc.

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GMB is a common anticancer drug that needs careful monitoring because of its variable and toxic effects. Detecting GMB in biological samples can help adjust the dosage and enhance the treatment outcomes. In this study, a novel electrochemical sensor was developed based on a carbon paste electrode modified with single stranded DNA, gold nanoparticles and multi-walled carbon nanotubes. We characterized the unmodified (bare CPE) and modified (ss-DNA/AuNPs/MWCNTs/CPE) electrodes using scanning electron microscopy SEM, EDX analysis and cyclic voltammetry (CV) techniques. The oxidation peak current was linearly proportional to the GMB concentration in two linear ranges: 1-10 and 10-50 µM, with a detection limit of 0.52 µM and a limit of quantification of 1.75 µM. The lower linear concentration range (1-10 µM) showed a sensitivity of 5.68 A.M-1.cm-2, while the higher range (10-50 µM) showed a sensitivity of 1.34 A.M-1.cm-2. We also investigated the repeatability, applicability and reproducibility of this method for human serum samples. We tested the selectivity and practical ability of the ss-DNA/AuNPs/MWCNTs/CPE for the determination of GMB in the presence of various interfering species and human serum samples. The results indicated that the ss-DNA/AuNPs/MWCNTs/CPE was a selective, reliable and accurate electrochemical sensor for GMB.

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Copper nanowires / poly (naphtoquinone chromium (III)) for simultaneous voltammetric detection of para - aminophenol, phenol and para - nitrophenol

Cited by 5 publications

References 89 publications

Electrocatalytic Oxidation of Nitrophenols via Ag Nanoparticles Supported on Citric-Acid-Modified Polyaniline

Electrocatalytic Oxidation of Nitrophenols via Ag Nanoparticles Supported on Citric-Acid-Modified Polyaniline

Self-Assembled Nanofibrous Membranes by Electrospinning as Efficient Dye Photocatalysts for Wastewater Treatment

A Sensitive Electrochemical DNA Biosensor for Determination of Anti-Cancer Drug Gemcitabine Based on an AuNPs/MWCNTs/Carbon Paste Electrode

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