Poly (Biphenol/biphenoquinone - Vanadium (IV)) modified electrode as selective sensor for detection of 4-nitrophenol

Narouie, Sabereh; Rounaghi, Gholam Hossein; Saravani, Hamideh; Shahbakhsh, Mehdi

doi:10.1016/j.microc.2021.106945

Cited by 6 publications

(2 citation statements)

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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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