Fabrication of sensor based on polyvinyl alcohol functionalized tungsten oxide/reduced graphene oxide nanocomposite for electrochemical monitoring of 4-aminophenol

Buledi, J Jamil A; Solangi, Amber R.; Hyder, Ali; Batool, Madeeha; Mahar, Nasurullah; Mallah, Arfana; Karimi-Maleh, Hassan; Karaman, Onur; Karaman, Ceren; Ghalkhani, Masoumeh

doi:10.1016/j.envres.2022.113372

Cited by 28 publications

(10 citation statements)

References 86 publications

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“…Electrochemical study of modi ed and bare electrode was done by cyclic voltammetry and electron impendence spectroscopy [15][16][17]. The response of each electrode was noticed in 0.1 M KCl and 5 mM [K 3 -Fe (CN) 6 and K 4 Fe (CN) 6 ] respectively, as shown in Fig.…”

Section: Electrochemical Behavior Of Modi Ed and Bare Electrodementioning

confidence: 99%

Electrochemical Monitoring of Trace-level Mercury in water sample using ZnO/GCE Modified Electrode

Bakhsh

Batool

Mallah

et al. 2022

Preprint

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Modification of glassy carbon electrode to electrochemically determine metal ions in water samples is of great interest these days. In this research, modified ZnO/GCE has been used to electrochemically sense mercury, which is toxic and harmful to human and aquatic life. ZnO NPs were synthesized by chemical aqueous growth procedure. Characteristic size and shape of ZnO NPs were determined by XRD and TEM whereas their elemental composition and functional group study were measured by EDX and FTIR, respectively. ZnO NPs were fabricated over GCE and electrochemical performance of modified ZnO/GCE was checked by employing cyclic voltammetry. The GCE fabricated with ZnO NPs was used to determine Hg (II) ions as a pollutant in real samples of water collected from Larkana district, Sindh, Pakistan. The linear dynamic range for mercury was found to be 1–80 µM with LOD and LOQ calculated as 0.001 µM .003 µM, respectively. The recovery percentage was obtained as; lowest 95% and highest 99% for canal water sample, while it was 92.5 to 100.2% for the samples ground water. The obtained results showed that the modified electrochemical sensor was stable for the selective detection of mercury ions even at low concentration.

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Section: Electrochemical Behavior Of Modi Ed and Bare Electrodementioning

confidence: 99%

Electrochemical Monitoring of Trace-level Mercury in water sample using ZnO/GCE Modified Electrode

Bakhsh

Batool

Mallah

et al. 2022

Preprint

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“…A variety of techniques, such as microbiological (Breier et al 2002 ), spectroscopy (Jayanna et al 2012 ; Rachidi et al 2006 ), liquid chromatography (Choemunng and Na-Bangchang 2010 ; Filist et al 2014 ), and high-performance liquid chromatography(Shepard et al 1991 ; Zeng et al 2014 ) have been reported for Azi determination. Despite sensitivity and accuracy, these methods require expensive equipment, long analysis times, hazardous solvent, and sophisticated sample preparation methods (Buledi et al 2022 ). On the other hand, the electrochemical sensors are simple, eco-friendly, and low-cost, with short analysis time and acceptable sensitivity, selectivity, and accuracy (Heidari and Ghaffarinejad 2019 ; Bijad et al 2021 ; Karimi-Maleh et al 2022a , b ; Rao et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

“…Bare electrodes modification with nanomaterials is one of the common ways for overcoming these limitations (Karimi-Maleh et al 2022b ; Ashrafzadeh Afshar et al 2022 ; Karaman et al 2022 ; Jafarzadeh et al 2022 ). Due to specific and significant properties that have been provided by nanomaterials, these materials have been noted and widely used in various fields of science and technology, such as energy storage, environmental application, sensor, food safety, hydrogen production, catalyst, biotechnology, optics, and electronics (Buledi et al 2022 ; Karimi-Maleh et al 2022c ; Hojjati-Najafabadi et al 2021 , 2022a ; c ; Ashrafzadeh Afshar et al 2022 ; Karaman et al 2022 ; Jafarzadeh et al 2022 ; Khatoon et al 2022 ; Coguplugil 2022 ; Hashemi et al 2022 ; Mansoorianfar et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive electrochemical sensor based on carbon paste electrode modified with graphene nanoribbon–CoFe2O4@NiO and ionic liquid for azithromycin antibiotic monitoring in biological and pharmaceutical samples

et al. 2023

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In this report, Azithromycin (Azi) antibiotic was measured by carbon paste electrode (CPE) improved by graphene nanoribbon–CoFe 2 O 4 @NiO nanocomposite and 1-hexyl-3 methylimidazolium hexafluorophosphate (HMIM PF 6 ) as an ionic liquid binder. The electrochemical behavior of Azi on the graphene nanoribbon–CoFe 2 O 4 @NiO/HMIM PF 6 /CPE is investigated by voltammetric methods, and the results showed that the modifiers improve the conductivity and electrochemical activity of the CPE. According to obtained data, the electrochemical behavior of Azi is related to pH. under optimum conditions, the sensor has linear ranges from 10 µM to 2 mM with a LOD of 0.66 µM. The effect of scan rate and chronoamperometry were studied, which showed that the Azi electro-oxidation is diffusion controlled with the diffusion coefficient of 9.22 × 10 –6 cm 2 /s. The reproducibility (3.15%), repeatability (2.5%), selectivity, and stability (for 30 days) tests were investigated, which results were acceptable. The actual sample analysis confirmed that the proposed sensor is an appropriate electrochemical tool for Azi determination in urine and Azi capsule.

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“…However, these conventional methods have specific bottlenecks; are costly and tedious; and require several preprocesses, sophisticated instrumentation, complex sample preparation methods, and consumption of hazardous organic solvents. On the other hand, electrochemical sensors truly address these shortcomings because they are highly sensitive and cost-effective; consume less time; require fewer processing steps; and offer robust analysis, reproducibility, and selectivity. − …”

Section: Introductionmentioning

confidence: 99%

Synthesis of NiO-Doped ZnO Nanoparticle-Decorated Reduced Graphene Oxide Nanohybrid for Highly Sensitive and Selective Electrochemical Sensing of Bisphenol A in Aqueous Samples

Buledi

Shaikh

Solangi

et al. 2023

Ind. Eng. Chem. Res.

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Bisphenol A (BPA) is broadly used in the plastic industry and has several health effects, especially on the brain and prostate gland of fetuses. BPA is a major environmental pollutant that drains into bodies of water and leaches from food packaging. Since it is a known endocrine disruptor, its extensive release into the environment is a serious concern. Thus, regular monitoring of BPA through a reliable and sensitive method is a strategy that can help alleviate its impact. To tackle this issue, an excellent conductive material based on a NiO/ZnO/rGO nanohybrid was used as an electrocatalyst to determine BPA in drinking water samples. The engineered material was characterized through XRD, EDX, and SEM. The EDX mapping was also used to examine the purity, surface texture, and focused elemental composition of the NiO/ZnO/rGO nanohybrid. The average size of the prepared material was calculated as 43.7 nm, which confirmed the nanometric size of the engineered nanohybrid material. The conductive behavior of the fabricated sensor NiO/ZnO/rGO/PtE was examined through electrochemical impedance spectroscopy (EIS) and cyclic voltammetry. The modified sensor revealed an excellent conductive nature with ohmic resistance calculated to be 412 Ω, which is lower than that of the bare electrode and GO/PtE (3628 and 2239 Ω, respectively). Under optimal parameters, the fabricated sensor showed excellent response for BPA. With a linear dynamic range of 0.07−30 μM, NiO/ZnO/rGO/PtE manifested the lowest possible detection limit found (4.0 nM). The analytical applicability of the proposed sensor was investigated in bottled and tap water. Furthermore, both the acceptable recovery values and anti-interference ability indicated the effectiveness and potential commercial utilization of NiO/ZnO/rGO/PtE. The recovery values for mineral and tap water were 97.0%, 99.0%, and 97.3% and 101%, 99.6%, and 98.7%, respectively.

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Fabrication of sensor based on polyvinyl alcohol functionalized tungsten oxide/reduced graphene oxide nanocomposite for electrochemical monitoring of 4-aminophenol

Cited by 28 publications

References 86 publications

Electrochemical Monitoring of Trace-level Mercury in water sample using ZnO/GCE Modified Electrode

Electrochemical Monitoring of Trace-level Mercury in water sample using ZnO/GCE Modified Electrode

Highly sensitive electrochemical sensor based on carbon paste electrode modified with graphene nanoribbon–CoFe2O4@NiO and ionic liquid for azithromycin antibiotic monitoring in biological and pharmaceutical samples

Synthesis of NiO-Doped ZnO Nanoparticle-Decorated Reduced Graphene Oxide Nanohybrid for Highly Sensitive and Selective Electrochemical Sensing of Bisphenol A in Aqueous Samples

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