Rationally engineered nanosensors: A novel strategy for the detection of heavy metal ions in the environment

Numan, Arshid; Gill, Atal A.S.; Rafique, Shazia; Guduri, Manisha; Zhan, Yiqiang; Maddiboyina, Balaji; Li, Lijie; Singh, Sima; Dang, Nam Nguyen

doi:10.1016/j.jhazmat.2020.124493

Cited by 113 publications

(28 citation statements)

References 130 publications

(97 reference statements)

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“…Under these conditions, the detection limit for Pb(II) using T-based CMEs is 10 −7 M, which corresponds to about 20 µg L −1 . This limit is a modest limit compared to the performance of the latest modified electrodes in the literature [29] and is required to be improved in order to be able to generate commercial electrodes. This is a primary investigation, but further studies will allow the optimization of all parameters for obtaining good sensor for Pb based on this azulene derivative.…”

Section: Hms Sensingmentioning

confidence: 99%

Surface Characterization of New Azulene-Based CMEs for Sensing

et al. 2021

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Films of 2-(azulen-1-yldiazenyl)-5-phenyl-1,3,4-thiadiazole (T) were successfully deposited on glassy carbon surfaces to prepare chemically modified electrodes (CMEs). Their surface characterization was analyzed by electrochemical impedance spectroscopy (EIS), atomic force microscopy (AFM), and scanning electron microscopy (SEM). This complexing monomer has been deposited through direct electropolymerization in conditions established during the electrochemical characterization of T performed by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and rotating disk electrode voltammetry (RDE). These methods put in evidence the high degree of asymmetry of oxidation and reduction curves, which is due to the irreversible processes occurring at opposite potentials. The film formation was confirmed by ferrocene redox assay probe. The properties of the electrodes modified with T (T-CMEs) were investigated for sensing heavy metal (HM) ions in water solutions, with promising results for Pb(II) among Cd(II), Cu(II), and Hg(II) ions.

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Section: Hms Sensingmentioning

confidence: 99%

Surface Characterization of New Azulene-Based CMEs for Sensing

et al. 2021

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“…Although these techniques are equipped with accuracy and reliability, most of them are generally less accepted on account of sophisticated operation procedures, the need for professional technicians, and tedious analysis time. Alternatively, electrochemical methods especially electrochemical sensors, featuring good portability, high sensitivity, and fast response have attracted tremendous attention in the analytical field. − Nevertheless, a huge challenge on how to exploit novel signal probes with improved electrochemical sensing performances still exists.…”

Section: Introductionmentioning

confidence: 99%

PPy-Functionalized NiFe₂O₄ Nanocomposites toward Highly Selective Pb²⁺ Electrochemical Sensing

Wang

Nie

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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Driven by the urgent requirement to monitor the trace amount of heavy metal ions, a novel electrochemical sensing platform is constructed by surface modification of magnetic NiFe 2 O 4 nanoparticles with polypyrrole (PPy). This NiFe 2 O 4 /PPy nanocomposite has a unique three-dimensional network architecture. Under the optimized experimental conditions, the fabricated sensor exhibits enhanced sensing performance for selective recognition of trace Pb 2+ in the range of 0.1−2.1 μM by square wave anodic stripping voltammetry. The sensitivity of a NiFe 2 O 4 /PPydecorated glassy carbon electrode (GCE) toward Pb 2+ is verified to be superior to that of both bare GCE and NiFe 2 O 4 -decorated GCE, and an extremely low detection limit of 3.9 nM (S/N = 3) can be achieved. The accurate detection of Pb 2+ is also challenged by various aqueous media and satisfactory recoveries varied from 98−107%, endowing it with great prospects in the analysis of real water samples. Moreover, the interferences from coexisting ions such as Cd 2+ , Fe 3+ , Zn 2+ , Ni 2+ , Cu 2+ , and Na + can be ignored to some extent. The present study not only provides a new candidate for the efficient detection of Pb 2+ but also sheds light on exploring advanced electrode materials to rationally design sensing interfaces.

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“…Environmental contamination from metals such as zinc, cadmium, lead, copper, cobalt, nickel, and mercury is a serious concern even at trace concentrations, − requiring the development of sensitive, selective, and accurate analytical methods to monitor such species . To date, many diverse techniques have been used for their detection, such as absorption, emission, fluorescence spectrometry, optical techniques, atomic absorption, and electrochemical technologies. − Electroanalytical methods are considered an efficient means of detecting a broad range of organic, inorganic, and heavy-metal ions because of their high accuracy, adaptability, sensitivity, rapid responses, and the fact that they are relatively inexpensive. − …”

Section: Introductionmentioning

confidence: 99%

Voltammetric Determination of Hg²⁺, Zn²⁺, and Pb²⁺Ions Using a PEDOT/NTA-Modified Electrode

et al. 2022

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A novel electrochemical sensor for determining trace levels of Hg 2+ , Pb 2+ , and Zn 2+ ions in water using square wave voltammetry (SWV) is reported. The sensor is based on a platinum electrode (Pt) modified by poly(3,4-ethylenedioxythiophene) and N α , N α -bis-(carboxymethyl)- l -lysine hydrate (NTA lysine) PEDOT/NTA. The modified electrode surface (PEDOT/NTA) was prepared via the introduction of the lysine-NTA group to a PEDOT/N-hydroxyphthalimide NHP electrode. The (PEDOT/NTA) was characterized via cyclic voltammetry (CV), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). The effects of scan rates on the electrochemical properties of the polymer electrode were also investigated. The electrochemical results were used to estimate the coverage of the electrode polymer surface and its electrostability in background electrolyte solutions. Several analytical parameters, such as polymer film thickness, metal deposition time, and pH of the electrolyte, were examined. Linear responses to Hg 2+ , Pb 2+ , and Zn 2+ ions in the concentration range of 5–100 μg L –1 were obtained. The limits of detection (LODs) for the determination of Hg 2+ , Pb 2+ , and Zn 2+ ions were 1.73, 2.33, and 1.99 μg L –1 , respectively. These promising results revealed that modified PEDOT/NTA films might well represent an important addition to existing electrochemical sensor technologies.

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Rationally engineered nanosensors: A novel strategy for the detection of heavy metal ions in the environment

Cited by 113 publications

References 130 publications

Surface Characterization of New Azulene-Based CMEs for Sensing

Surface Characterization of New Azulene-Based CMEs for Sensing

PPy-Functionalized NiFe₂O₄ Nanocomposites toward Highly Selective Pb²⁺ Electrochemical Sensing

Voltammetric Determination of Hg²⁺, Zn²⁺, and Pb²⁺Ions Using a PEDOT/NTA-Modified Electrode

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Rationally engineered nanosensors: A novel strategy for the detection of heavy metal ions in the environment

Cited by 113 publications

References 130 publications

Surface Characterization of New Azulene-Based CMEs for Sensing

Surface Characterization of New Azulene-Based CMEs for Sensing

PPy-Functionalized NiFe2O4 Nanocomposites toward Highly Selective Pb2+ Electrochemical Sensing

Voltammetric Determination of Hg2+, Zn2+, and Pb2+Ions Using a PEDOT/NTA-Modified Electrode

Contact Info

Product

Resources

About

PPy-Functionalized NiFe₂O₄ Nanocomposites toward Highly Selective Pb²⁺ Electrochemical Sensing

Voltammetric Determination of Hg²⁺, Zn²⁺, and Pb²⁺Ions Using a PEDOT/NTA-Modified Electrode