Electrochemical Detection of 2‐Nitrophenol Using a Glassy Carbon Electrode Modified with BaO Nanorods

Alam, M. M.; Asiri, Abdullah M.; Rahman, Mohammed M.

doi:10.1002/asia.202100250

Cited by 16 publications

(9 citation statements)

References 58 publications

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“…Due to the applied potential, it is reduced to 4-aminophenol, as indicated in the reaction scheme below. Comparable electrochemical reduction reactions of 4-NP are reported in other articles [52][53][54]. The suggested electrochemical reaction of 4-NP on the Pt NPs-embedded PPy-CB@ZnO NCs/GCE surface is as follows (Equations ( 4)-( 6 Finally, the Pt-NP-embedded PPy-CB@ZnO NCs/PEDOT:PSS/GCE-fabricated sensor probe was used for the sensor validation by electrochemical analysis with real environmental samples, which were collected from various environmental sources, including underground water, tap water, and sea water.…”

Section: Electrochemical Studies Of Pt-nps-embedded Ppy-cb@zno Ncssupporting

confidence: 70%

Sensitive Electrochemical Detection of 4-Nitrophenol with PEDOT:PSS Modified Pt NPs-Embedded PPy-CB@ZnO Nanocomposites

et al. 2022

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In this study, a selective 4-nitrophenol (4-NP) sensor was developed onto a glassy carbon electrode (GCE) as an electron-sensing substrate, which decorated with sol–gel, prepared Pt nanoparticles- (NPs) embedded polypyrole-carbon black (PPy-CB)/ZnO nanocomposites (NCs) using differential pulse voltammetry. Characterizations of the NCs were performed using Field Emission Scanning Electron Microscopy (FESEM), Energy-Dispersive Spectroscopy (EDS), X-ray Photoelectron Spectroscopy (XPS), Ultraviolet–visible Spectroscopy (UV–vis), Fourier Transform Infrared Spectroscopy (FTIR), High Resolution Transmission Electron Microscopy (HRTEM), and X-ray Diffraction Analysis (XRD). The GCE modified by conducting coating binders [poly(3,4-ethylenedioxythiophene) polystyrene sulfonate; PEDOT:PSS] based on Pt NPs/PPy-CB/ZnO NCs functioned as the working electrode and showed selectivity toward 4-NP in a phosphate buffer medium at pH 7.0. Our analysis of 4-NP showed the linearity from 1.5 to 40.5 µM, which was identified as the linear detection range (LDR). A current versus concentration plot was formed and showed a regression co-efficient R2 of 0.9917, which can be expressed by ip(µA) = 0.2493C(µM) + 15.694. The 4-NP sensor sensitivity was calculated using the slope of the LDR, considering the surface area of the GCE (0.0316 cm2). The sensitivity was calculated as 7.8892 µAµM−1cm−2. The LOD (limit of detection) of the 4-NP was calculated as 1.25 ± 0.06 µM, which was calculated from 3xSD/σ (SD: Standard deviation of blank response; σ: Slope of the calibration curve). Limit of quantification (LOQ) is also calculated as 3.79 µM from LOQ = 10xLOD/3.3. Sensor parameters such as reproducibility, response time, and analyzing stability were outstanding. Therefore, this novel approach can be broadly used to safely fabricate selective 4-NP sensors based on nanoparticle-decorated nanocomposite materials in environmental measurement.

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Section: Electrochemical Studies Of Pt-nps-embedded Ppy-cb@zno Ncssupporting

confidence: 70%

Sensitive Electrochemical Detection of 4-Nitrophenol with PEDOT:PSS Modified Pt NPs-Embedded PPy-CB@ZnO Nanocomposites

et al. 2022

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“…It is close to the reported literature level. 59,60 The quenching effect of Bi-TDPAT on ONP in the range of 0−250 μM can be fitted by nonlinear SV equation, I 0 /I = a exp(k[Q]) + b, where a, k, and b are constants. It can be seen from Figure 23 that the nonlinear fitting degree is good, and the correlation coefficient R 2 can reach 0.999.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Cage Bismuth Metal–Organic Framework Materials Based on a Flexible Triazine–Polycarboxylic Acid: Subgram Synthesis, Application for Sensing, and White Light Tuning

et al. 2022

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Bismuth-based metal–organic frameworks (MOFs) have always attracted the attention of many researchers. Here, we first report a crystalline Bi-MOF (Bi-TDPAT) based on a flexible triazine-polycarboxylic linker 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine (H6TDPAT) and bismuth nitrate; its crystallite quality is adequately good and the diffraction data can be collected directly by single crystal X-ray diffraction rather than 3D electron diffraction. The structure of Bi-TDPAT belongs to a novel topology type btt. Notably, the synthesis scale of Bi-TDPAT can be expanded, and sub-gram synthesis can be realized. At the same time, we synthesized a microcrystalline material Bi-TATAB utilizing 2,4,6-tris(4-carboxylphenylamino)-1,3,5-triazine (H3TATAB). The structures of the two materials were characterized by several microanalysis tools. Considering that Bi-TDPAT is a blue light-emitting material with a broad emission peak, we prepared a white light emitting composite material Eu/Tb@Bi-TDPAT by encapsulating Eu(III)/Tb(III) in Bi-TDPAT. In addition, the fluorescence sensing functions of Bi-TDPAT and Bi-TATAB were explored. The results showed that they could detect and recognize various nitrophenols, and the optimal limit of detection is as low as 0.21 μM, which can be reused even after five cycles. Energy competitive absorption (CA) and photo-induced electron transfer are the main sensing mechanisms. By comparing and analyzing the properties of these two bismuth-based crystalline materials, we believe that this work also provides inspiration for the synthesis and development of bismuth-based MOF in the future.

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“…Thus, this test confirms that the assembled sensor based on the Ag-decorated Chitosan/SrSnO 3 NC/GCE has good reliability for analyzing 2,6-DNP. Comparison studies [ 46 , 47 , 48 , 49 , 50 ] of 2,6-DNP detection based on various nanocomposites sensing electrodes are demonstrated and included in the Table 1 .…”

Section: Resultsmentioning

confidence: 99%

Efficient Detection of 2,6-Dinitrophenol with Silver Nanoparticle-Decorated Chitosan/SrSnO3 Nanocomposites by Differential Pulse Voltammetry

et al. 2022

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Herein, an ultra-sonication technique followed by a photoreduction technique was implemented to prepare silver nanoparticle-decorated Chitosan/SrSnO3 nanocomposites (Ag-decorated Chitosan/SrSnO3 NCs), and they were successively used as electron-sensing substrates coated on a glassy carbon electrode (GCE) for the development of a 2,6-dinitrophenol (2,6-DNP) efficient electrochemical sensor. The synthesized NCs were characterized in terms of morphology, surface composition, and optical properties using FESEM, TEM, HRTEM, BET, XRD, XPS, FTIR, and UV-vis analysis. Ag-decorated Chitosan/SrSnO3 NC/GCE fabricated with the conducting binder (PEDOT:PSS) was found to analyze 2,6-DNP in a wide detection range (LDR) of 1.5~13.5 µM by applying the differential pulse voltammetry (DPV) approach. The 2,6-DNP sensor parameters, such as sensitivity (54.032 µA µM−1 cm−2), limit of detection (LOD; 0.18 ± 0.01 µM), limit of quantification (LOQ; 0.545 µM) reproducibility, and response time, were found excellent and good results. Additionally, various environmental samples were analyzed and obtained reliable analytical results. Thus, it is the simplest way to develop a sensor probe with newly developed nanocomposite materials for analyzing the carcinogenic contaminants from the environmental effluents by electrochemical approach for the safety of environmental and healthcare fields in a broad scale.

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Electrochemical Detection of 2‐Nitrophenol Using a Glassy Carbon Electrode Modified with BaO Nanorods

Cited by 16 publications

References 58 publications

Sensitive Electrochemical Detection of 4-Nitrophenol with PEDOT:PSS Modified Pt NPs-Embedded PPy-CB@ZnO Nanocomposites

Sensitive Electrochemical Detection of 4-Nitrophenol with PEDOT:PSS Modified Pt NPs-Embedded PPy-CB@ZnO Nanocomposites

Cage Bismuth Metal–Organic Framework Materials Based on a Flexible Triazine–Polycarboxylic Acid: Subgram Synthesis, Application for Sensing, and White Light Tuning

Efficient Detection of 2,6-Dinitrophenol with Silver Nanoparticle-Decorated Chitosan/SrSnO3 Nanocomposites by Differential Pulse Voltammetry

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