Amino acid assisted growth of CuO nanostructures and their potential application in electrochemical sensing of organophosphate pesticide

Soomro, Razium Ali; Hallam, K; Ibupoto, Zafar Hussain; Tahira, Aneela; Sherazi, Syed Tufail Hussain; Sirajjuddin,; Memon, Safia Sanam; Willander, Magnus

doi:10.1016/j.electacta.2015.12.165

Cited by 54 publications

(16 citation statements)

References 26 publications

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“…The DPV method was chosen due to its high sensitivity, once the effects of the charging currents can be reduced. In this way the detection measurements can be performed using extremely small amounts of the analytes [4]. DPV curves, displayed in figure 4(A), show the decrease of the reduction peak (centered at −0.43 V) as the malathion concentration increases.…”

Section: Electrochemical Detection Of Malathionmentioning

confidence: 99%

“…As a consequence, humans and the environment can be affected directly and indirectly, once soil, water, air, living beings and food are the targets of contamination by chemical pollutants. Among the pollutants, pesticides used in agriculture are considered hazardous chemicals if not properly used or managed [4][5][6]. Specifically, organophosphorus pesticides (OPs) are a group of organic pesticides that present high toxicity, and contribute with about 38% of the total pesticide used worldwide [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical sensor based on polyamide 6/polypyrrole electrospun nanofibers coated with reduced graphene oxide for malathion pesticide detection

Migliorini

Sanfelice

Mercante

et al. 2019

Mater. Res. Express

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An electrochemical sensor based on polymeric electrospun nanofibers of polyamide 6 (PA6)/ polypyrrole (PPy) surface-modified with two forms of graphene was developed for the detection of malathion, an organophosphorus pesticide. The materials were chosen considering the electrospun nanofibers possess large surface area and porosity, while reduced graphene oxide has remarkable electrical conductivity, which is a good strategy to increase sensor sensitivity and improve the limit of detection towards the pesticide. The surface modification of nanofibers with graphene was carried out using chemically (CRGO) and electrochemically reduced graphene oxide (ERGO), in order to demonstrate how the degree of reduction of graphene oxide can influence its electrical conductivity. The influence of the reduction on the conductivity properties of graphene-based films was studied through electrochemical techniques: cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The platform modified with CRGO, which presented higher electrical conductivity compared to ERGO, was used in the electrochemical detection of the pesticide malathion and exhibited a low detection limit of 0.8 ng ml −1 (S/N=3). The results indicate that chemically reduced graphene oxide is a potential alternative for modifying electrodes surfaces designed for sensing distinct pollutants of environmental or agricultural interest.

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Section: Electrochemical Detection Of Malathionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical sensor based on polyamide 6/polypyrrole electrospun nanofibers coated with reduced graphene oxide for malathion pesticide detection

Migliorini

Sanfelice

Mercante

et al. 2019

Mater. Res. Express

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“…Here, the use of hierarchical structures, complex morphologies of nanomaterials have shown relatively superior performance compared with their traditional counterparts. Particular, in terms of electro-catalytic activity, the complex morphologies are known to exhibit superior performances owing to the mishmash of free surface energy, the charge density concentrated at the corners of the complex morphology, and the larger total surface area [7][8][9][10][11]. On the other hand, the use of heterojunction is also a promising approach to acquire a high throughput signal.…”

Section: Introductionmentioning

confidence: 99%

“…Rapid and selective detection of PCT from human serum samples would be beneficial for an early diagnosis, thereby decreasing the overall response time for the treatment. Contrary to the conventional approaches such as radioimmunoassay [4], colorimetric immunoassay [5], and enzyme-linked immunosorbent assay [6], the electrochemical approach designed for the detection of such molecules offers the advantage of high sensitivity, rapid detection time, and the capability to be transformed into a miniaturized device for field portability [7,8]. As the concentration of PCT in normal blood is less than 0.1 ng mL −1 [3], a highly sensitive electrochemical system is required for its accurate detection.…”

Section: Introductionmentioning

confidence: 99%

In Situ Growth of CuWO4 Nanospheres over Graphene Oxide for Photoelectrochemical (PEC) Immunosensing of Clinical Biomarker

Abbas

Soomro

Kalwar

et al. 2019

Sensors

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Procalcitonin (PCT) protein has recently been identified as a clinical marker for bacterial infections based on its better sepsis sensitivity. Thus, an increased level of PCT could be linked with disease diagnosis and therapeutics. In this study, we describe the construction of the photoelectrochemical (PEC) PCT immunosensing platform based on it situ grown photo-active CuWO4 nanospheres over reduced graphene oxide layers (CuWO4@rGO). The in situ growth strategy enabled the formation of small nanospheres (diameter of 200 nm), primarily composed of tiny self-assembled CuWO4 nanoparticles (2–5 nm). The synergic coupling of CuWO4 with rGO layers constructed an excellent photo-active heterojunction for photoelectrochemical (PEC) sensing. The platform was then considered for electrocatalytic (EC) mechanism-based detection of PCT, where inhibition of the photocatalytic oxidation signal of ascorbic acid (AA), subsequent to the antibody–antigen interaction, was recorded as the primary signal response. This inhibition detection approach enabled sensitive detection of PCT in a concentration range of 10 pg·mL−1 to 50 ng.mL−1 with signal sensitivity achievable up to 0.15 pg·mL−1. The proposed PEC hybrid (CuWO4@rGO) could further be engineered to detect other clinically important species.

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“…However, up to date, to our knowledge there is no electrochemical method dedicated for determination of this compound. Despite that fact in the literature exist many examples of non‐enzyme electrodes for the detection of nitroorganophosphate pesticides . Electrochemical assay often offers selectivity and sensitivity due to the selective detection of electroactive species among the complex samples.…”

Section: Introductionmentioning

confidence: 99%

First Electroanalytical Studies of Profluralin with Square Wave Voltammetry Using Glassy Carbon Electrode

et al. 2016

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The electrochemical behaviour of profluralin (PFL) was investigated with square wave voltammetry (SWV) and cyclic voltammetry at bare and modified with graphene, graphene oxide, reduced graphene oxide, carbon nanotubes glassy carbon electrode. The influence of various factors such as pH, buffer composition, ionic surfactants and voltammetric parameters was studied. The best results in terms of signal shape and intensity were recorded in 0.04 M Britton‐Robinson buffer at pH 2.0 at −0.43 V versus Ag/AgCl. In acidic medium profluralin produces single cathodic signal of an irreversible nature. Observed peak (two superimposed signals from two nitro groups) is a result of PFL reduction controlled by diffusion processes. Linearity of peak currents (Ip) vs. concentrations of profluralin was found in the range of 1.0×10−7 to 1.0×10−6 M with a detection limit of 2.6×10−8 M using fast and sensitive SWV. The developed method has been applied for the quantitative analysis of profluralin in spiked environmental samples with very good average recoveries in the range from 98.6 to 99.9 % with a mean relative standard deviation of 4.0 %.

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Amino acid assisted growth of CuO nanostructures and their potential application in electrochemical sensing of organophosphate pesticide

Cited by 54 publications

References 26 publications

Electrochemical sensor based on polyamide 6/polypyrrole electrospun nanofibers coated with reduced graphene oxide for malathion pesticide detection

Electrochemical sensor based on polyamide 6/polypyrrole electrospun nanofibers coated with reduced graphene oxide for malathion pesticide detection

In Situ Growth of CuWO4 Nanospheres over Graphene Oxide for Photoelectrochemical (PEC) Immunosensing of Clinical Biomarker

First Electroanalytical Studies of Profluralin with Square Wave Voltammetry Using Glassy Carbon Electrode

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