Tailored construction of one-dimensional TiO2/Au nanofibers: Validation of an analytical assay for detection of diphenylamine in food samples

Kokulnathan, Thangavelu; Vishnuraj, Ramakrishnan; Chen, Shen‐Ming; Pullithadathil, Biji; Ahmed, Faheem; Hasan, P.M.Z.; Bilgrami, Anwar L.; Kumar, Shalendra

doi:10.1016/j.foodchem.2022.132052

Cited by 41 publications

(13 citation statements)

References 52 publications

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“…The Nyquist plots (Cole–Cole plots) obtained at BiVO 4 /GCE, MoS 2 /GCE, and MoS 2 @BiVO 4 in 0.1 M KCl containing 5 mM [Fe(CN) 6 ] 3–/4– and the effect of surface modification on charge transfer resistance ( R ct ) values are depicted in Figure a. Randle’s equivalent circuit used for fitting the impedance data is given as the inset of Figure a, where R ct denotes the charge transfer resistance, R s denotes the ohmic resistance, Z W is the Warburg impedance, and C dl refers to the double layer electron-transfer resistance, respectively. − The high-frequency semicircular arc of the Nyquist plot relates to the ease with which the electron transfer occurs and gives a direct account of the electron transfer kinetics. The diameter of the arc is a direct function of the R ct value.…”

Section: Resultsmentioning

confidence: 99%

In Situ Synthesis of a Bismuth Vanadate/Molybdenum Disulfide Composite: An Electrochemical Tool for 3-Nitro-l-Tyrosine Analysis

et al. 2022

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The quantification of 3-nitro-l-tyrosine (NO2-Tyr), an in vivo biomarker of nitrosative stress, is indispensable for the clinical intervention of various inflammatory disorders caused by nitrosative stress. By integrating the unique features of BiVO4 and MoS2 with matching bandgap energies, electrode materials with amplified response signals can be developed. In this regard, we introduce a hydrothermally synthesized bismuth vanadate sheathed molybdenum disulfide (MoS2@BiVO4) heterojunction as a highly sensitive electrode material for the determination of NO2-Tyr. Excellent electrochemical behavior perceived for the MoS2@BiVO4 augments the performance of the sensor and allows the measurement of NO2-Tyr in biological media without any time-consuming pretreatments. The synergistic interactions between BiVO4 and MoS2 heterojunctions contribute to low resistance charge transfer (R ct = 159.13 Ω·cm2), a reduction potential E pc = −0.58 V (vs Ag/AgCl), and a good response range (0.001–526.3 μM) with a lower limit of detection (0.94 nM) toward the detection of NO2-Tyr. An improved active surface area, reduced charge recombination, and high analyte adsorption contribute to the high loading of the biomarker for improved selectivity (in the presence of 10 interfering compounds), operational stability (1000 s), and reproducibility (six various modified electrodes). The proposed sensor was successfully utilized for the real-time determination of NO2-Tyr in water, urine, and saliva samples with good recovery values (±98.94–99.98%), ascertaining the reliability of the method. It is noteworthy that the electrochemical activity remains unaffected by other redox interferons, thus leading to targeted sensing applications.

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Section: Resultsmentioning

confidence: 99%

In Situ Synthesis of a Bismuth Vanadate/Molybdenum Disulfide Composite: An Electrochemical Tool for 3-Nitro-l-Tyrosine Analysis

et al. 2022

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“…It is employed as a parent compound for the manufacturing of nonsteroidal anti-inflammatory medications and as a stabilizing ingredient in explosives, fragrance goods, and propellants. 49 Therefore, precise detection of DPAH •+ in the food and industrial sector is very important. Various analytical techniques including fluorometric opto-sensor technique, spectrophotometric technique, high-performance liquid chromatography, fluorescence/synchronous fluorimetry technique, molecularly imprinted method, chromatographic technique, and electrochemical method are available for the low concentration analysis of DPAH •+ .…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, there is a considerable risk of consuming excessive DPAH •+ , which might result in undesirable side effects such as hypertension, blood poisoning, head ache, eczema, bladder disease, tachycardia, cough, hemosiderosis, dermatitis, and erythropoiesis. , The inclusion of this significant pollutant on the list of preferred chemicals by the EU underlines the importance of its detection, where the EU directive 91/414/EEC displays 5–10 mg kg –1 as the highest reference concentration to be used. , DPAH •+ is also used in a variety of industrial operations, including DNA detection, the synthesis of photographic chemicals, and the production of azo-dyes, rubber, medicines, and plastics. It is employed as a parent compound for the manufacturing of nonsteroidal anti-inflammatory medications and as a stabilizing ingredient in explosives, fragrance goods, and propellants . Therefore, precise detection of DPAH •+ in the food and industrial sector is very important.…”

Section: Introductionmentioning

confidence: 99%

Surfactant-Assisted Synthesis of Praseodymium Orthovanadate Nanofiber-Supported NiFe-Layered Double Hydroxide Bifunctional Catalyst: The Electrochemical Detection and Degradation of Diphenylamine

et al. 2022

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Physiological storage disorders are caused by ineffective post-harvest handling of horticultural crops, particularly fruits. To address these post-harvest concerns, diphenylamine (DPAH •+ ) is widely used as a preservative to prevent fruit degradation and surface scald during storage around the world. Humans are negatively affected by the use of high concentrations of DPAH •+ because of the various health complications related to its exposure. As a result, accurate detection and quantification of DPAH •+ residues in treated fruits are critical. Rare earth metal orthovanadates, which have excellent physical and chemical properties, are potential materials for electrochemical sensors in this area. Herein, we present a simple and direct ultrasonication technique for the surfactant-assisted synthesis of praseodymium orthovanadate (PrVO 4 or PrV) loaded on nickel iron layered double hydroxide (NiFe-LDH) synthesized with deep eutectic solvent assistance, as well as its application as an effective catalyst in the detection and degradation of DPAH •+ in fruits and water samples. The current work presents supreme electrochemical features of a PrV@NiFe-LDH-modified screen-printed carbon electrode (SPCE) where cetyltrimethylammonium bromide (CTAB) surfactant-driven fabrication of PrV directs the formation of highly qualified engineered structures and the deep eutectic solvent based green synthesis of NiFe-LDH creates hierarchical lamellar structures following the principles of green chemistry. PrV and NiFe-LDH combine to produce a synergistic effect that improves the number of active sites, charge transfer kinetics, and electronic conductivity. Differential pulse voltammetry analysis of PrV@NiFe-LDH/SPCE reveals a dynamic working range (0.005−226.26 μM), increased sensitivity (133.13 μA μM −1 cm −2 ), enhanced photocatalytic activity, and low detection limit (0.001 μM), which are considered significant when compared with the former reported electrodes in the literature for the determination of DPAH ̇+ for its real-time applications.

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“…Hence, a considerable range of concentrations had to be covered for CT fabrication even at lower levels in the environmental samples. Numerous analytical methods have been established for the determination of CT, which include high-performance liquid chromatography, gas chromatography, flow-injection analysis, chemiluminescence, and electrochemical techniques. − Among these methods, electrochemical techniques are more prominent due to their cost-effectiveness, easy handling, and facile approach for the impulsive monitoring of environmental pollutants. − …”

Section: Introductionmentioning

confidence: 99%

Construction of a Copper Bismuthate/Graphene Nanocomposite for Electrochemical Detection of Catechol

et al. 2022

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Binary metal oxides with carbon nanocomposites have received extensive attention as research hotspots in the electrochemistry field owing to their tunable properties and superior stability. This work illustrates the development of a facile sonochemical strategy for the synthesis of a copper bismuthate/graphene (GR) nanocomposite-modified screen-printed carbon electrode (CBO/GR/SPCE) for the electrochemical detection of catechol (CT). The formation of an as-prepared CBO/GR nanocomposite was comprehensively characterized. The electrochemical behavior of the CBO/GR/SPCE toward CT was investigated by voltammetry and amperometry techniques. The fabricated CBO/GR/SPCE manifests an excellent electrocatalytic performance toward CT with a lower peak potential and a higher current value compared to those of CBO/SPCE, GR/SPCE, and bare SPCE. It is attributed to enhanced electro-catalytic activity, synergetic effects, and good active sites of the CBO/GR nanocomposite. Under the electrochemical condition, the CBO/GR/SPCE displayed a wide linear sensing range, trace-level detection limit, acceptable sensitivity, and excellent selectivity. Furthermore, our proposed CBO/GR electrode was employed successfully for CT detection in water samples.

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Tailored construction of one-dimensional TiO2/Au nanofibers: Validation of an analytical assay for detection of diphenylamine in food samples

Cited by 41 publications

References 52 publications

In Situ Synthesis of a Bismuth Vanadate/Molybdenum Disulfide Composite: An Electrochemical Tool for 3-Nitro-l-Tyrosine Analysis

In Situ Synthesis of a Bismuth Vanadate/Molybdenum Disulfide Composite: An Electrochemical Tool for 3-Nitro-l-Tyrosine Analysis

Surfactant-Assisted Synthesis of Praseodymium Orthovanadate Nanofiber-Supported NiFe-Layered Double Hydroxide Bifunctional Catalyst: The Electrochemical Detection and Degradation of Diphenylamine

Construction of a Copper Bismuthate/Graphene Nanocomposite for Electrochemical Detection of Catechol

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