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Xhanari K, Finšgar M. Recent advances in the modification of electrodes for trace metal analysis: a review. Analyst 2023; 148:5805-5821. [PMID: 37697964 DOI: 10.1039/d3an01252b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
This review paper summarizes the research published in the last five years on using different compounds and/or materials as modifiers for electrodes employed in trace heavy metal analysis. The main groups of modifiers are identified, and their single or combined application on the surface of the electrodes is discussed. Nanomaterials, film-forming substances, and polymers are among the most used compounds employed mainly in the modification of glassy carbon, screen-printed, and carbon paste electrodes. Composites composed of several compounds and/or materials have also found growing interest in the development of modified electrodes. Environmentally friendly substances and natural products (mainly biopolymers and plant extracts) have continued to be included in the modification of electrodes for trace heavy metal analysis. The main analytical performance parameters of the modified electrodes as well as possible interferences affecting the determination of the target analytes, are discussed. Finally, a critical evaluation of the main findings from these studies and an outlook discussing possible improvements in this area of research are presented.
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Affiliation(s)
- Klodian Xhanari
- University of Maribor, Faculty of Chemistry and Chemical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia.
- University of Tirana, Faculty of Natural Sciences, Boulevard "Zogu I", 1001 Tirana, Albania
| | - Matjaž Finšgar
- University of Maribor, Faculty of Chemistry and Chemical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia.
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2
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Altahan MF, Nower M. AutoGIS processing for site selection for solar pond development as efficient water treatment plants in Egypt. Sci Rep 2023; 13:17009. [PMID: 37813897 PMCID: PMC10562386 DOI: 10.1038/s41598-023-44047-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 10/03/2023] [Indexed: 10/11/2023] Open
Abstract
The increasing demand for renewable and environmentally friendly energy sources is a top priority for many countries around the world. It is obvious that renewable solar energy will help to meet most of the energy demand in the coming years. A solar pond is a huge Salt artificial Lake that serves as a solar energy collection system. However, site selection is a critical factor that affects the effectiveness and lifetime of a solar pond. Here, we present an innovative methodology for site selection based on three environmental factors, including direct solar irradiance (DNI), temperature, and wind speed. Our approach uses Python programming and clustering analysis with several libraries, including Pandas, Geopandas, Rasterio, Osgeo, and Sklearn, to analyse and process data collected over a 30-year period from NASA power. This method was applied to the geographic boundaries of Egypt, but the methods can be applied to any spatial context if the same dataset is available. The results show that Egypt has a potential land area of 500 km2 suitable for solar ponds construction along the border with Sudan throughout the year, including 2000 km2 in winter (between January and March), 800 km2 in spring (between April and June), 900 km2 in summer (between July and September), and the largest area of 3700 km2 (between October and December), most of which is located in the south of the Eastern Desert and around the Nile River. Notably, the northwestern region, close to the Mediterranean Sea on the border with Libya, exhibits suitability for solar pond development, with consistent performance throughout the year. Our results provide an efficient way for GIS and data processing and could be useful for implementing new software to find the best location for solar ponds development. This could be beneficial for those interested in investing in renewable energy and using solar ponds as an efficient water treatment plant.
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Affiliation(s)
- Mahmoud Fatehy Altahan
- Central Laboratory for Environmental Quality Monitoring (CLEQM), National Water Research Center (NWRC), El-Qanater El-Khairia, 13621, Egypt.
| | - Mohamed Nower
- Water Management Research Institute (WMRI), National Water Research Center (NWRC), El-Qanater El-Khairia, 13621, Egypt.
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3
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Altahan MF, Ali AG, Hathoot AA, Azzem MA. Modified electrode decorated with silver as a novel non-enzymatic sensor for the determination of ammonium in water. Sci Rep 2023; 13:16861. [PMID: 37803033 PMCID: PMC10558464 DOI: 10.1038/s41598-023-43616-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 09/26/2023] [Indexed: 10/08/2023] Open
Abstract
Ammonium is an essential component of the nitrogen cycle, which is essential for nitrogen cycling in ecosystems. On the other hand, ammonium pollution in water poses a great threat to the ecosystem and human health. Accurate and timely determination of ammonium content is of great importance for environmental management and ensuring the safety of water supply. Here we report a highly sensitive electrochemical sensor for ammonium in water samples. The modified electrode is based on the incorporation of silver nitrate (AgNO3) into a carbon paste embedded with 1-aminoanthraquinone and supported by multi-walled carbon nanotubes, which are commercially available. A potential of 0.75 V is applied to the modified electrode, followed by activation in hydrochloric acid. The modified electrode was used for square wave voltammetry of ammonium in water in the potential range of - 0.4-0.2 V. The performance of ammonium analysis was determined in terms of square wave frequency, square wave amplitude and concentration of electrolyte solution (sodium sulphate). The calculation of the surface area according to the Randles-Sevcik equation resulted in the largest surface area for the Ag/pAAQ/MWCNTs/CPE. The modified electrode exhibited a linear range of 5-100 µM NH4+ in 0.1 M Na2SO4 with a detection limit of 0.03 µM NH4+ (3σ). In addition, the modified electrode showed high precision with an RSD value of 9.93% for 10 repeated measurements. No interfering effect was observed at twofold and tenfold additive concentrations of foreign ions. Good recoveries were obtained in the analysis of tap and mineral water after spiking with a concentration of ammonium ions.
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Affiliation(s)
- Mahmoud Fatehy Altahan
- Central Laboratory for Environmental Quality Monitoring, National Water Research Centre, El-Qanater El-Khairia, 13621, Egypt.
| | - Asmaa Galal Ali
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University, Shibin El-Kom, 32511, Egypt.
| | - Abla Ahmed Hathoot
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University, Shibin El-Kom, 32511, Egypt
| | - Magdi Abdel Azzem
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University, Shibin El-Kom, 32511, Egypt
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Altahan MF, AbdelAzzem M. A new approach for determination of orthophosphate based on mixed valent molybdenum oxide/poly 1,2-diaminoanthraquinone in seawater. Sci Rep 2023; 13:13634. [PMID: 37604877 PMCID: PMC10442350 DOI: 10.1038/s41598-023-40479-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 08/10/2023] [Indexed: 08/23/2023] Open
Abstract
Orthophosphate is an essential macronutrient in natural water that controls primary production and strongly influences the global ocean carbon cycle. Electrochemical determination of orthophosphate is highly recommended because electrochemistry provides the simplest means of determination. Here the determination of orthophosphate based on the formation of a phosphomolybdate complex is reported. Mixed-valent molybdenum oxide (MoxOy) was prepared by cyclic voltammetry on poly-1,2-diaminoanthraquinone (1,2-DAAQ), which was performed by cyclic voltammetry on the surface of a glassy carbon electrode under pre-optimized conditions for the thickness of the modified electrode layers. The proposed modified electrode was used for square-wave voltammetry of orthophosphate ions under pre-optimized square-wave parameters (i.e., frequency and amplitude) in strongly acidic medium (pH < 1). The linear range was 0.05-4 µM with a limit of quantification (LOD) of 0.0093 µM with no effect on two peaks due to cross interference from silicate. Furthermore, MoxOy/PDAAQ shows good reproducibility with a relative standard deviation (RSD) of 2.17% for the peak at 0.035 V and 3.56% for the peak at 0.2 V. Real seawater samples were also analyzed for PO43- analysis by UV spectrophotometry and the results were compared with the measurement results of our proposed electrode, with good recoveries obtained.
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Affiliation(s)
- Mahmoud Fatehy Altahan
- Central Laboratory for Environmental Quality Monitoring, National Water Research Center, El-Qanater El-Khairia, 13621, Egypt.
| | - Magdi AbdelAzzem
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University, Shibin El-Kom, 32511, Egypt
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Wang J, Kan K, Yu P, Fan Y, Fan J, Jiang L, Qin F, Shi K. Confined self-assembly of S, O co-doped GCN short nanotubes/EG composite towards HMIs electrochemical detection and removal. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131345. [PMID: 37027923 DOI: 10.1016/j.jhazmat.2023.131345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/16/2023] [Accepted: 04/01/2023] [Indexed: 06/19/2023]
Abstract
In this paper, we prepared composites by confining S, O co-doped C3N4 short nanotubes (SOT) into the slit holes of expanded graphite (EG). The prepared SOT/EG composites had hierarchical pores. Macroporous and mesoporous were conducive to the permeation of heavy metal ions (HMIs) solution, while microporous were favorable for HMIs capture. In addition, EG had excellent adsorption and conductive properties. By leveraging their synergistic effect, SOT/EG composites could be used for electrochemical detection and removal of HMIs simultaneously. The excellent HMIs electrochemical detection and removal performances were due to the unique 3D microstructure and the increase of active sites such as S and O. When SOT/EG composites were prepared into modified electrodes, the limit of detections (LODs) of Pb2+ and Hg2+ were 0.038 and 0.051 μg L-1 for simultaneous detection and 0.045 and 0.057 μg L-1 for individual detection. When SOT/EG composites were used as adsorbents, the equilibrium adsorption capacity of Pb2+ and Hg2+ solution of 10 mg L-1 could reach 228.0 and 313.1 mg g-1, and the adsorption efficiency was above 90%. Due to the low raw materials cost and simple preparation method, SOT/EG composite is a very promising bifunctional material for HMIs electrochemical detection and removal.
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Affiliation(s)
- Jue Wang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China; Heilongjiang Academy of Sciences, Institute of Advanced Technology, Harbin 150020, PR China
| | - Kan Kan
- Heilongjiang Academy of Sciences, Institute of Advanced Technology, Harbin 150020, PR China.
| | - Ping Yu
- Heilongjiang Academy of Sciences, Institute of Advanced Technology, Harbin 150020, PR China
| | - Yihe Fan
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China
| | - Jiahui Fan
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China
| | - Lin Jiang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China
| | - Fangjie Qin
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China
| | - Keying Shi
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China.
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Shalaby EA, Beltagi AM, Hathoot AA, Azzem MA. Simultaneous voltammetric sensing of Zn 2+, Cd 2+, and Pb 2+ using an electrodeposited Bi-Sb nanocomposite modified carbon paste electrode. RSC Adv 2023; 13:7118-7128. [PMID: 36875874 PMCID: PMC9978880 DOI: 10.1039/d3ra00168g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/22/2023] [Indexed: 03/06/2023] Open
Abstract
A sensor for detecting Zn2+, Cd2+, and Pb2+ ions simultaneously based on the square wave anodic stripping response at a bismuth antimony (Bi-Sb) nanocomposite electrode was developed. The electrode was prepared in situ by electrodepositing bismuth and antimony on the surface of a carbon-paste electrode (CPE) while also reducing the analyte metal ions. The structure and performance of the Bi-Sb/CPE electrode were studied using scanning electron microscopy, X-ray diffraction, electrochemical impedance spectroscopy, and cyclic voltammetry. Operational conditions including the concentration of Sb and Bi, the type of electrolyte, pH, and preconcentration conditions were optimized. The linear ranges were determined to be 5-200 μg L-1 for Zn2+, 1-200 μg L-1 for Cd2+, and 1-150 μg L-1 for Pb2+ with the optimized parameters. The limits of detection were 1.46 μg L-1, 0.27 μg L-1, and 0.29 μg L-1 for Zn2+, Cd2+, and Pb2+, respectively. Furthermore, the Bi-Sb/CPE sensor is capable of selective determination of the target metals in the presence of the common cationic and anionic interfering species (Na+, K+, Ca2+, Mg2+, Fe3+, Mn2+, Co2+, Cl-, SO4 2- and HCO3 -). Finally, the sensor was successfully applied to the simultaneous determination of Zn2+, Cd2+, and Pb2+ in a variety of real-world water samples.
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Affiliation(s)
- E A Shalaby
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University Shebin El-Kom 32511 Egypt
| | - A M Beltagi
- Department of Chemistry, Faculty of Science, Kafrelsheikh University Kafrelsheikh 33516 Egypt
| | - A A Hathoot
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University Shebin El-Kom 32511 Egypt
| | - M Abdel Azzem
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University Shebin El-Kom 32511 Egypt
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Cai H, Liang Y, Huang L, Wang J. Relay detection of Cu 2+ and bovine serum albumin by a dansyl derivative-based fluorescent probe. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 277:121281. [PMID: 35472704 DOI: 10.1016/j.saa.2022.121281] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 04/15/2022] [Accepted: 04/16/2022] [Indexed: 06/14/2023]
Abstract
A dansyl derivative-based fluorescent probe, namely, DGly, was developed for relay detection of Cu2+ and bovine serum albumin (BSA) with high selectivity and sensitivity. The fluorescence intensity of DGly at 540 nm displayed "on-off-on" phenomenonafter Cu2+ and BSA were added in sequence. Correspondingly, the solution color changed from yellow to dark and then to yellowish white under 365 nm UV light irradiation; thus, the solution could be detected by the naked eye. The association constant of DGly-Cu2+ was stronger than that of DGly-BSA and DGly-Cu2+-BSA. Hence, BSA was detected after a complex was formed between DGly and Cu2+. The relay detection of Cu2+ and BSA was not influenced by other competitive interferents, and the detection limits of Cu2+ and BSA were 1.32 and 0.26 μM, respectively. Analysis of Cu2+ in real water samples validated the detection performance of the method proposed herein; it achieved satisfactory recovery and relative standard deviation values. This work demonstrated that introducing metal ions can be an effective way to improve the sensitivity of BSA detection.
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Affiliation(s)
- Honghui Cai
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Yuehui Liang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Lilian Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Jing Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
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8
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Ali AG, Altahan MF, Beltagi AM, Hathoot AA, Abdel-Azzem M. Voltammetric and impedimetric determinations of selenium(iv) by an innovative gold-free poly(1-aminoanthraquinone)/multiwall carbon nanotube-modified carbon paste electrode. RSC Adv 2022; 12:4988-5000. [PMID: 35425500 PMCID: PMC8981389 DOI: 10.1039/d1ra07588h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 01/28/2022] [Indexed: 11/21/2022] Open
Abstract
Selenite (Se4+), a significant source of water pollution above the permissible limits, is considered a valuable metal by environmentalists. In this study, we described a novel electrochemical sensor that utilized a carbon paste electrode (CPE) that was modified using multiwall carbon nanotubes (MWCNTs) and poly(1-aminoanthraquinone) (p-AAQ) for finding Se4+ in water samples. Electrochemical quantification of Se4+ depends on the formation of a selective complex (piaselenol) with p-AAQ. In this work, we prepared a CPE modified by physical embedding of MWCNTs and 1-aminoanthraquione (AAQ), while the polymer film was formed by anodic polymerization of AAQ by applying a constant potential of 0.75 V in 0.1 M HCl for 20 s followed by cyclic voltammetry (CV) from −0.2 to 1.4 V for 20 cycles. The modified CPE was used for differential pulse voltammetry (DPV) of Se4+ in 0.1 M H2SO4 from 0 to 0.4 V with a characteristic peak at 0.27 V. Further, the proposed sensor was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and electrochemical impedance spectroscopy (EIS). The analytical conditions regarding the electrode performance and voltammetric measurements were optimized, with the accumulation time and potential, supporting electrolyte, differential-pulse period/time, and amplitude. The EIS results indicated that the p-AAQ/MWCNTs-modified CPE sensor (p-AAQ/MWCNTs/CPE) that also exhibited low charge-transfer resistance (Rct) toward the anodic stripping of Se4+, exhibited good analytical performance toward different concentrations of Se4+ in a linear range of 5–50 μg L−1 Se4+ with a limit of determination (LOD) of 1.5 μg L−1 (3σ). Furthermore, differential-pulse voltammetry was employed to determine different concentrations of Se4+ in a linear range of 1–50 μg L−1 Se4+, and an LOD value of 0.289 μg L−1 was obtained. The proposed sensor demonstrated good precision (relative standard deviation = 4.02%) at a Se4+ concentration of 5 μg L−1. Moreover, the proposed sensor was applied to analyze Se4+ in wastewater samples that were spiked with Se, and it achieved good recovery values. The selenite ion is quantified electrochemically by selective complexation with poly(1-aminoanthraquione) to give a piaselenol complex on a modified p-AAQ/MWCNTs/CPE sensor.![]()
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Affiliation(s)
- Asmaa Galal Ali
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University, Shibin El-Kom 32511, Egypt
| | - Mahmoud Fatehy Altahan
- Central Laboratory for Environmental Quality Monitoring, National Water Research Center, El-Qanater El-Khairia 13621, Egypt
| | - Amr Mohamed Beltagi
- Chemistry Department, Faculty of Science, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
| | - Abla Ahmed Hathoot
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University, Shibin El-Kom 32511, Egypt
| | - Magdi Abdel-Azzem
- Electrochemistry Laboratory, Chemistry Department, Faculty of Science, Menoufia University, Shibin El-Kom 32511, Egypt
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Letsoalo M, Ambushe AA, Mamo MA. Novel Chemoresistive Sensor for Sensitive Detection of Pb 2+ Ions Using an Interdigital Gold Electrode Fabricated with a Reduced Graphene Oxide-Based Ion-Imprinted Polymer. ACS OMEGA 2021; 6:31528-31538. [PMID: 34869979 PMCID: PMC8637608 DOI: 10.1021/acsomega.1c03955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
This study presents novel chemoresistive reduced graphene oxide-ion-imprinted polymer (IIP-rGO)-based sensors for detection of lead (Pb2+) ions. The ion-imprinted polymer was synthesized by bulk polymerization and modified with a variable amount of rGO incorporated to form an IIP-rGO composite. The amount of rGO in the polymer matrix affected the sensor's relative response, and 1:3 mass ratio produced excellent results, with a consistent trend as the concentration of Pb2+ ions increased in the solution. The decrease in relative resistance (ΔR/R o) followed an exponential decay relationship between the ΔR/R o response and the concentration of Pb2+ ions in aqueous solutions. After solving the exponential decay function, it is observed that the sensor has the upper limit of ΔR/R o >1.7287 μg L-1, and the limit of detection of the sensor is 1.77 μg L-1. A nonimprinted polymer (NIP)-based sensor responded with a low relative resistance of the same magnitude although the concentration was varied. The response ratio of the IIP-based sensor to the NIP-based sensor (ΔR/R o)IIP/(ΔR/R o)NIP as a function of the concentration of Pb2+ ions in the solution shows that the response ratios recorded a maximum of around 22 at 50 μg L-1 and then decreased as the concentration increased, following an exponential decay function with the minimum ratio of 2.09 at 200 μg L-1 but never read 1. The sensor showed excellent selectivity against the bivalent cations Mn2+, Fe2+, Sn2+, and Ti2+. The sensor was capable of exhibiting 90% ΔR/R o response repeatability in a consecutive test.
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Affiliation(s)
- Mokgehle
R. Letsoalo
- Department
of Chemical Sciences, Faculty of Science, University of Johannesburg, Auckland Park Campus, P. O. Box
17011, Johannesburg 2028, South Africa
| | - Abayneh A. Ambushe
- Department
of Chemical Sciences, Faculty of Science, University of Johannesburg, Auckland Park Campus, P. O. Box
17011, Johannesburg 2028, South Africa
| | - Messai A. Mamo
- Department
of Chemical Science, Faculty of Science, University of Johannesburg, Doornfontein Campus, P. O. Box
17011, Johannesburg 2028, South Africa
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Shalaby EA, Beltagi AM, Hathoot AA, Azzem MA. Development of a Sensor Based on poly(1,2‐diaminoanthraquinone) for Individual and Simultaneous Determination of Mercury (II) and Bismuth (III). ELECTROANAL 2021. [DOI: 10.1002/elan.202100315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- E. A. Shalaby
- Electrochemistry Laboratory Chemistry Department Faculty of Science Menoufia University Shebin El-Kom 32511 Egypt
| | - A. M. Beltagi
- Department of Chemistry Faculty of Science Kafrelsheikh University Kafrelsheikh 33516 Egypt
| | - A. A. Hathoot
- Electrochemistry Laboratory Chemistry Department Faculty of Science Menoufia University Shebin El-Kom 32511 Egypt
| | - M. Abdel Azzem
- Electrochemistry Laboratory Chemistry Department Faculty of Science Menoufia University Shebin El-Kom 32511 Egypt
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11
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Mohammed MQ, Ismail HK, Alesary HF, Barton S. Use of a Schiff base-modified conducting polymer electrode for electrochemical assay of Cd(II) and Pb(II) ions by square wave voltammetry. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01882-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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12
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Anodic Stripping Voltammetry with the Hanging Mercury Drop Electrode for Trace Metal Detection in Soil Samples. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9050107] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The widely spread use of the hanging mercury drop electrode (HMDE) for multi-ion analysis is primarily ascribed to the following reasons: (i) excellent reproducibility owing to the easy renewal of the electrode surface avoiding any hysteresis effect (i.e., a new identical drop is generated for each measurement to be accomplished); (ii) a wide cathodic potential window originating from the passive hydrogen evolution and solvent electrolysis; (iii) the ability to form amalgams with many redox-active metal ions; and (iv) the achievement of (sub)nanomolar limits of detection. On the other hand, the main controversy of the HMDE usage is the high toxicity level of mercury, which has motivated the scientific community to question whether the HMDE deserves to continue being used despite its unique capability for multi-metal detection. In this work, the simultaneous determination of Zn2+, Cd2+, Pb2+, and Cu2+ using the HMDE is investigated as a model system to evaluate the main features of the technique. The analytical benefits of the HMDE in terms of linear range of response, reproducibility, limit of detection, proximity to ideal redox behavior of metal ions and analysis time are herein demonstrated and compared to other electrodes proposed in the literature as less-toxic alternatives to the HMDE. The results have revealed that the HMDE is largely superior to other reported methods in several aspects and, moreover, it displays excellent accuracy when simultaneously analyzing Zn2+, Cd2+, Pb2+, and Cu2+ in such a complex matrix as digested soils. Yet, more efforts are required towards the definitive replacement of the HMDE in the electroanalysis field, despite the elegant approaches already reported in the literature.
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Toghan A, Abd-Elsabour M, Abo-Bakr AM. A novel electrochemical sensor based on EDTA-NQS/GC for simultaneous determination of heavy metals. SENSORS AND ACTUATORS A: PHYSICAL 2021; 322:112603. [DOI: 10.1016/j.sna.2021.112603] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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14
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Preparation of GO/Fe 3O 4@PMDA/AuNPs nanocomposite for simultaneous determination of As 3+ and Cu 2+ by stripping voltammetry. Talanta 2021; 230:122288. [PMID: 33934761 DOI: 10.1016/j.talanta.2021.122288] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 12/14/2022]
Abstract
One of the critical challenges in the simultaneous determination of As3+ and Cu2+ by stripping voltammetry is the overlapping of their oxidation peaks. Therefore, the engineering of nanostructured sensors in order to uplift their electrochemical performance is a significant issue for the codetection of As3+ and Cu2+. Herein, we modified a glassy carbon electrode with a new nanocomposite based on poly methyldopa along with gold nanoparticles immobilized on the surface of magnetic graphene oxide (GCE/GO/Fe3O4@PMDA/AuNPs) that can determine As3+ and Cu2+ with great sensitivity. Optimization of the measurement conditions by square wave stripping voltammetry (SWSV) caused the oxidation peaks of As3+ and Cu2+ to be distinguished significantly from each other, while the peak currents of As3+ and Cu2+ increased 9-12 fold, respectively, compared to the bare electrode. The proposed electrode exhibits low detection limits (S/N ≥ 3): 0.15 ppb for As3+ and 0.11 ppb for Cu2+. The GCE/GO/Fe3O4@PMDA/AuNPs also has good linearity over a wide concentration range from 5 to 500 ppb for As3+ and 0.5-750 ppb for Cu2+. The good recovery values were obtained for the analysis of As3+ and Cu2+ in pool and drinking water samples.
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15
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Poly(1,5-Diaminonaphthalene)-Modified Screen-Printed Device for Electrochemical Lead Ion Sensing. ADVANCES IN POLYMER TECHNOLOGY 2021. [DOI: 10.1155/2021/6637316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Poly(1,5-diaminonaphthalene) has been electropolymerized on the screen-printed device with a three-electrode configuration. The modified electrodes have been developed as the new electrode for electrochemical determination of trace levels of lead ions (Pb2+). The poly(1,5-diaminonaphthalene) film prevents the deposition of Pb2+ into the surface defects of the bare carbon screen-printed electrode and possesses sensitivity to heavy metal ions thanks to amine and secondary amino groups on the polymer chain. The square wave anodic stripping voltammetry was applied to detect Pb2+ ions, showing a sharp stripping peak with the linear range from 0.5 μg·L-1 to 5.0 μg·L-1 (
). The limit of detection was found to be 0.30 μg·L-1. The sensors were applied to the analysis of Pb2+ in the tap water sample matrix with satisfactory results.
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Single and simultaneous voltammetric sensing of lead(II), cadmium(II) and zinc(II) using a bimetallic Hg-Bi supported on poly(1,2-diaminoanthraquinone)/glassy carbon modified electrode. SENSING AND BIO-SENSING RESEARCH 2020. [DOI: 10.1016/j.sbsr.2020.100369] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Shan X, Pan T, Pan Y, Wang W, Chen X, Shan X, Chen Z. Highly Sensitive and Selective Detection of Pb(II) by NH
2
−SiO
2
/Ru(bpy)
3
2+
−UiO66 based Solid‐state ECL Sensor. ELECTROANAL 2019. [DOI: 10.1002/elan.201900424] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Xiaomeng Shan
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical EngineeringChangzhou University Changzhou 213164 China
| | - Tao Pan
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical EngineeringChangzhou University Changzhou 213164 China
| | - Yuting Pan
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical EngineeringChangzhou University Changzhou 213164 China
| | - Wenchang Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical EngineeringChangzhou University Changzhou 213164 China
- Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
| | - Xiaohui Chen
- School of Chemistry and Material EngineeringChangzhou Vocational Institute of Engineering Changzhou 213164 China
| | - Xueling Shan
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical EngineeringChangzhou University Changzhou 213164 China
- Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
| | - Zhidong Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical EngineeringChangzhou University Changzhou 213164 China
- Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou University Changzhou 213164 China
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Voltammetric determination of cadmium(II), lead(II) and copper(II) with a glassy carbon electrode modified with silver nanoparticles deposited on poly(1,8-diaminonaphthalene). Mikrochim Acta 2019; 186:440. [DOI: 10.1007/s00604-019-3552-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 05/24/2019] [Indexed: 12/12/2022]
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19
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Bakhsh EM, Khan SB, Marwani HM, Danish EY, Asiri AM. Efficient electrochemical detection and extraction of copper ions using ZnSe–CdSe/SiO2 core–shell nanomaterial. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.01.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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20
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Hathoot AA, Hassan KM, Ali AG, Shatla AS, Baltruschat H, Abdel-Azzem M. Mono and dual hetero-structured M@poly-1,2 diaminoanthraquinone (M = Pt, Pd and Pt–Pd) catalysts for the electrooxidation of small organic fuels in alkaline medium. RSC Adv 2019; 9:1849-1858. [PMID: 35516099 PMCID: PMC9059733 DOI: 10.1039/c8ra09342c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 12/18/2018] [Indexed: 11/24/2022] Open
Abstract
Oxidation of some small organic fuels such as methanol (MeOH), ethanol (EtOH) and ethylene glycol (EG) was carried out in an alkaline medium using palladium (Pd)–platinum (Pt) nanoparticles/poly1,2-diaminoanthraquinone/glassy carbon (p1,2-DAAQ/GC) catalyst electrodes. Pd and Pt were incorporated into the p1,2-DAAQ/GC electrode using the cyclic voltammetry (CV) technique. The obtained Pd/p1,2-DAAQ/GC, Pt/p1,2-DAAQ/GC, Pt/Pd/p1,2-DAAQ/GC and Pd/Pt/p1,2-DAAQ/GC nanocatalyst electrodes were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and CV methods. Real active surface area (Areal) achieved by carbon monoxide (CO) adsorption using differential electrochemical mass spectroscopy (DEMS) technique. The electrochemical activity was evaluated and normalized to Areal per metal loading mass. The electrocatalytic oxidation of the small organic fuels at the prepared nanocatalyst electrodes was studied in 1.0 M NaOH solutions by CV and chronoamperometric (CA) techniques. Pt/Pd/p1,2-DAAQ/GC nanocatalyst electrode exhibited enhanced catalytic activity, better durability and higher tolerance to carbon monoxide generated in the oxidation reaction when compared with the other three studied nanocatalysts. The present investigation suggests that the studied nanocatalysts can be successfully applied in direct oxidation of small organic fuels, especially MeOH. Oxidation reaction of some small organic fuels such as methanol, ethanol and ethylene glycol was carried out in alkaline medium at palladium (Pd)–platinum (Pt) nanoparticles/poly1,2-diaminoanthraquinone/glassy carbon catalyst electrodes.![]()
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Affiliation(s)
- Abla Ahmed Hathoot
- Electrochemistry Laboratory
- Chemistry Department
- Faculty of Science
- Menoufia University
- Shibin El-Kom 32511
| | - Khalid Mahmoud Hassan
- Electrochemistry Research Laboratory
- Physics and Mathematics Engineering Department
- Faculty of Electronic Engineering
- Menoufia University
- Menouf 23952
| | - Asmaa Galal Ali
- Electrochemistry Laboratory
- Chemistry Department
- Faculty of Science
- Menoufia University
- Shibin El-Kom 32511
| | - Ahmed Said Shatla
- Electrochemistry Laboratory
- Chemistry Department
- Faculty of Science
- Menoufia University
- Shibin El-Kom 32511
| | - Helmut Baltruschat
- Institute of Physical and Theoretical Chemistry
- Bonn University
- D-53117 Bonn
- Germany
| | - Magdi Abdel-Azzem
- Electrochemistry Laboratory
- Chemistry Department
- Faculty of Science
- Menoufia University
- Shibin El-Kom 32511
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Hersey M, Berger SN, Holmes J, West A, Hashemi P. Recent Developments in Carbon Sensors for At-Source Electroanalysis. Anal Chem 2018; 91:27-43. [PMID: 30481001 DOI: 10.1021/acs.analchem.8b05151] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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22
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Dzhardimalieva GI, Uflyand IE. Synthetic Methodologies for Chelating Polymer Ligands: Recent Advances and Future Development. ChemistrySelect 2018. [DOI: 10.1002/slct.201802516] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Gulzhian I. Dzhardimalieva
- Laboratory of MetallopolymersThe Institute of Problems of Chemical Physics RAS Academician Semenov avenue 1, Chernogolovka, Moscow Region 142432 Russian Federation
| | - Igor E. Uflyand
- Department of ChemistrySouthern Federal University B. Sadovaya str. 105/42, Rostov-on-Don 344006 Russian Federation
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