Electrochemical evaluation of Cd2+ and Hg2+ ions in water using ZnO/Cu2ONPs/PANI modified SPCE electrode

Okpara, Enyioma C.; Fayemi, Omolola E.; Sherif, El‐Sayed M.; Ganesh, Pattan-Siddappa; Swamy, B.E. Kumara; Ebenso, Eno E.

doi:10.1016/j.sbsr.2022.100476

Cited by 19 publications

(19 citation statements)

References 37 publications

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“…NMs have been primarily applied on the electrodes in combination with other modifiers (including through the formation of composites). [22][23][24][25]27,[30][31][32]34,46,47,50,54,59,67,70,72,75,83,85,86,88,89,[92][93][94][95][96][97][98][99][100][101][102]107,113,115,117,118,[122][123][124][125][126][129][130][131]135,136,[138][139]...…”

Section: Nanomaterials As Electrode Modifiersmentioning

confidence: 99%

“…32,98,101,142,148,154,158 However, the use of CNTs also faces challenges related to their synthesis (i.e., cost and specific route) as well as the need for binders to improve their mechanical stability. 196 Metals (i.e., Ag, Au, Bi, Pd, Pt, Pb, and Sn), [23][24][25]56,57 27,31,67,96,100,103,109,112,118,122,124,130,131,133,[135][136][137]188,197,198 are the most commonly used NPs in the modification of the electrodes. In addition, clinoptilolite (a naturally occurring zeolite containing Si and Al) NPs were ion exchanged in a Fe(II) solution, and the modified CPE obtained was used in the determination of Sn 2+ .…”

Section: Nanomaterials As Electrode Modifiersmentioning

confidence: 99%

“…232 Biopolymers (mainly chitosan and different forms of cellulose) 35,37,61,69,[71][72][73]87,89,92,123,124,175,186,187,197,[200][201][202][203][204][205] (further discussed in section 7) and Nafion (a sulfonated tetrafluoroethylene-based fluoropolymer-copolymer) 24,62,108,113,149,154,155,179,200,[233][234][235][236][237][238][239][240][241] are by far most frequently used as polymeric components of the nanocomposites. Moreover, other conducting polymers such as polyaniline (PANI), 23,38,99,102,122,144,183,[206]<...…”

Section: Polymers As Electrode Modifiersmentioning

confidence: 99%

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Recent advances in the modification of electrodes for trace metal analysis: a review

Xhanari,

Finšgar

2023

Analyst

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Section: Nanomaterials As Electrode Modifiersmentioning

confidence: 99%

Section: Nanomaterials As Electrode Modifiersmentioning

confidence: 99%

Section: Polymers As Electrode Modifiersmentioning

confidence: 99%

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Recent advances in the modification of electrodes for trace metal analysis: a review

Xhanari,

Finšgar

2023

Analyst

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“…Numerous studies were carried out regarding polypyrrole (PPy) [ 26 , 27 ], polyaniline (PANI) [ 28 , 29 ], and poly(3,4-ethylenedioxythiophene) (PEDOT) [ 30 ], etc. PANI is often a choice in electrochemical sensor fabrications, as it is used as the matrix for nanocomposites employed to modify screen-printed electrodes for various electrochemical sensing studies [ 31 , 32 , 33 ]. Furthermore, zinc oxide nanocomposites are often used to modify the screen-printed electrodes in order to fabricate fast and efficient non-enzymatic electrochemical sensing platforms for detecting amino acids [ 34 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon Inks-Based Screen-Printed Electrodes for Qualitative Analysis of Amino Acids

Enache

Enculescu

Bunea

et al. 2023

IJMS

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Due to the great significance of amino acids, a substantial number of research studies has been directed toward the development of effective and reliable platforms for their evaluation, detection, and identification. In order to support these studies, a new electrochemical platform based on PANI/ZnO nanowires’ modified carbon inks screen-printed electrodes was developed for qualitative analysis of electroactive amino acids, with emphasis on tyrosine (Tyr) and tryptophan (Trp). A comparative investigation of the carbon ink before and after modification with the PANI/ZnO was performed by scanning electron microscopy and by Raman spectroscopy, confirming the presence of PANI and ZnO nanowires. Electrochemical investigations by cyclic voltammetry and electrochemical impedance spectroscopy have shown a higher charge-transfer rate constant, which is reflected into lower charge-transfer resistance and higher capacitance values for the PANI/ZnO modified ink when compared to the simple carbon screen-printed electrode. In order to demonstrate the electrochemical performances of the PANI/ZnO nanowires’ modified carbon inks screen-printed electrodes for amino acids analysis, differential pulse voltammograms were obtained in individual and mixed solutions of electroactive amino acids. It has been shown that the PANI/ZnO nanowires’ modified carbon inks screen-printed electrodes allowed for tyrosine and tryptophan a peak separation of more than 100 mV, enabling their screening and identification in mixed solutions, which is essential for the electrochemical analysis of proteins within the proteomics research field.

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“…Conventionally, many effective technologies such as UV-vis spectrometry, laser-induced breakdown spectroscopy (LIBS), atomic absorption/emission spectroscopy, and inductively coupled plasma optical emission spectrometry (ICP-OES) etc., have been used in the evaluation of WQ [18,19]. They require sampling and laboratory techniques, which could be time-consuming, resulting in a delay in detection and congruent response to contamination, and are expensive to run [20,21].…”

Section: Introductionmentioning

confidence: 99%

On-line water quality inspection system: the role of the wireless sensory network

Okpara

Sehularo

Wojuola

2022

Environ. Res. Commun.

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Freshwater, in general, is one of the most basic components of a healthy ecosystem and an asset to humanity. It is currently threatened by the massive generation of industrial and domestic waste following the expansion of global industrialization and population boom. The inflow of untreated industrial and domestic wastewater effluents, agricultural runoff, and sanitary landfill water into rivers and seas often leads to contamination of freshwater bodies and the limitation of clean water in circulation. However, there is increasing dependence on freshwater sources for various human activities. Hence, the need for continuous assessment of the quality of available environmental water has become a crucial research concern, as the conventional techniques often used are not sufficient to meet the expanding demand for real-time, rapid, low-cost, reliable, and sensitive water quality monitoring. Hence, this mini-review briefly explores alternative wireless sensor network automated tools designed to ensure safe, real-time, rapid, low-cost, reliable, and sensitive assessment of environmental water.

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Electrochemical evaluation of Cd2+ and Hg2+ ions in water using ZnO/Cu2ONPs/PANI modified SPCE electrode

Cited by 19 publications

References 37 publications

Recent advances in the modification of electrodes for trace metal analysis: a review

Recent advances in the modification of electrodes for trace metal analysis: a review

Carbon Inks-Based Screen-Printed Electrodes for Qualitative Analysis of Amino Acids

On-line water quality inspection system: the role of the wireless sensory network

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