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Qi X, Liu P, Yao F, Zhao M, Shen X, Wang Z. Exploring the synchronized effect of MWCNT/X-manganate (X-Cu, Zn) nanocomposite for the sensitive and selective electrochemical detection of Hg(II) and Pb(II) in water. ANAL SCI 2024:10.1007/s44211-024-00652-1. [PMID: 39212898 DOI: 10.1007/s44211-024-00652-1] [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: 04/21/2024] [Accepted: 08/11/2024] [Indexed: 09/04/2024]
Abstract
The presence of heavy metal ions in the environment is a long-lasting problem that requires the simultaneous detection of Hg(II) and Pb(II) which is both vital and challenging. This present study examines a simplified and effective approach for synthesizing multi-walled carbon nanotube-copper manganese oxide (MWCNT-CuMn2O4) and multi-walled carbon nanotube-zinc manganese oxide (MWCNT-ZnMn2O4) nanocomposites for electrochemical detection of heavy metal ions. The nanocomposites MWCNT-CuMn2O4 and MWCNT-ZnMn2O4 exceptional electrochemical performance was evaluated using Square Wave Anodic Stripping Voltammetry (SWASV). The fabricated MWCNT-ZnMn2O4 demonstrated lower values of Electrochemical Impedance Spectroscopy (EIS) with charge transfer resistance (Rct) of approximately 34.13 Ω. Remarkably, the MWCNT-ZnMn2O4 electrochemical sensor exhibited the widest linear ranges of 0.5-10 μM with sensitive detection limits (0.011 μM for Hg(II) and 0.014 μM for Pb(II)). Interestingly, the MWCNT-ZnMn2O4 sensor showed excellent capability in detecting Hg(II) and Pb(II) in real water samples with a recovery percentage of 94.1% and 91.3%. Overall, the MWCNT-ZnMn2O4 modified GCE showcased superior selectivity, sensitivity, reproducibility, stability, and repeatability.
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Affiliation(s)
- Xingpu Qi
- School of Food Science and Technology, Jiangsu Agri-animal Husbandry Vocational College, No. 8, Fenghuang East Road, Taizhou, 225300, People's Republic of China
| | - Ping Liu
- School of Food Science and Technology, Jiangsu Agri-animal Husbandry Vocational College, No. 8, Fenghuang East Road, Taizhou, 225300, People's Republic of China
| | - Fang Yao
- School of Food Science and Technology, Jiangsu Agri-animal Husbandry Vocational College, No. 8, Fenghuang East Road, Taizhou, 225300, People's Republic of China
| | - Mengli Zhao
- School of Food Science and Technology, Jiangsu Agri-animal Husbandry Vocational College, No. 8, Fenghuang East Road, Taizhou, 225300, People's Republic of China
| | - Xuanyu Shen
- School of Food Science and Technology, Jiangsu Agri-animal Husbandry Vocational College, No. 8, Fenghuang East Road, Taizhou, 225300, People's Republic of China
| | - Zhengyun Wang
- School of Food Science and Technology, Jiangsu Agri-animal Husbandry Vocational College, No. 8, Fenghuang East Road, Taizhou, 225300, People's Republic of China.
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Mostafa MR, Mohamed GG, Fouad OA. Electrochemical and statistical study of Nickel ion assessment in daily children intake samples relying on magnesium aluminate spinel nanoparticles. Sci Rep 2024; 14:16424. [PMID: 39013935 PMCID: PMC11252383 DOI: 10.1038/s41598-024-64052-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Accepted: 06/04/2024] [Indexed: 07/18/2024] Open
Abstract
Lately, children's daily consumption of some products, such as cereals and candies, has been rising, which provides a compelling rationale for determining any metallic substances that may be present. Monitoring the concentration of certain metals, like nickel, in these products is necessary due to medical issues in humans when consumed regularly. So, in this work, a novel and highly selective carbon paste as a Ni(II) ion-selective sensor was prepared and investigated using ceramic magnesium aluminum spinel nanoparticles as the ionophore and tritolyl phosphate (TOCP) as a plasticizer. A modified co-precipitation method was used to synthesize the spinel nanoparticles. X-ray diffraction, scanning electron microscope with EDAX, transmission electron microscope, and BET surface area were used to determine the phase composition, microstructure, pores size, particle size, and surface area of the synthesized nanoparticles. The spinel nanoparticle was found to have a nano crystallite size with a cubic crystal system, a particle size ranging from 17.2 to 51.52 nm, mesoporous nature (average pore size = 8.72 nm), and a large surface area (61.75 m2/g). The composition ratio of graphite carbon as a base: TOCP as binder: spinal as ionophore was 67.3:30.0:2.7 (wt%) based on potentiometric detections over concentrations from 5.0 × 10-8 to 1.0 × 10-2 mol L-1 with LOD of 5.0 × 10-8 mol L-1. A measurement of 29.22 ± 0.12 mV decade-1 over pH 2.0-7.0 was made for the Nernstian slope. This sensor demonstrated good repeatability over nine weeks and a rapid response of 8 s. A good selectivity was shown for Ni(II) ions across many interferents, tri-, di-, and monovalent cations. The Ni(II) content in spiked real samples, including cocaine, sweets, coca, chocolate, carbonated drinks, cereals, and packages, were measured. The results obtained indicated no significant difference between the proposed potentiometric method and the officially reported ICP method according to the F- and t-test data. In addition to utilizing ANOVA statistical analysis, validation procedures have been implemented, and the results exceed the ICP-MS methodology.
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Affiliation(s)
- Maysa R Mostafa
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Gehad G Mohamed
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt
- Nanoscience Department, Basic and Applied Sciences Institute, Egypt-Japan University of Science and Technology, New Borg El Arab, Alexandria, 21934, Egypt
| | - Omar A Fouad
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt.
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Periodic Copper Microbead Array on Silver Layer for Dual Mode Detection of Glyphosate. OPENNANO 2022. [DOI: 10.1016/j.onano.2022.100105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Modification of glassy carbon electrode with manganese cobalt oxide-cubic like structures incorporated graphitic carbon nitride sheets for the voltammetric determination of 2,4,6 -trichlorophenol. Mikrochim Acta 2022; 189:205. [PMID: 35488133 DOI: 10.1007/s00604-022-05305-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 04/02/2022] [Indexed: 02/01/2023]
Abstract
Novel cube-like transition metal oxide embedded on graphitic carbon nitride (MCO@GCN) formed a hybrid composite via hydrothermal assisted sonochemical synthesis. The synthesized composite was examined with various physical characterizations such as morphological SEM, EDX, XRD, and FT-IR spectroscopy. The electrocatalytic activity of MCO@GCN composite was further investigated when used to modify a glassy carbon electrode (GCE). The electrochemical sensor was investigated using modified MCO@GCN/GCE towards environmental pollutant 2,4,6-trichlorophenol (2,4,6-TCP) detection with at a potential of (+ 0.654 V vs Ag/AgCl) in pH-7. The structural features have favored a high charge transfer ratio with excellent conductivity which showed a low detection limit (LOD) of 0.0068 μM and sensitivity of 23.57 μA·μM-1·cm-2 comprising a wide linear working range of 0.01-1720 μM by using differential pulse voltammetry. Besides, the MCO@GCN/GCE displayed excellent selectivity , repeatability, reproducibility, storage, and operational stability. Notably, the proposed MCO@GCN/GCE was validated with different environmental samples (tap, river, and industrial water) with RSD 0.62-2.86% and 96.51-99.66% (n = 3) recovery.
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Balaji R, Maheshwaran S, Chen SM, Tamilalagan E, Chandrasekar N, Ethiraj S, Samuel MS. Fabricating BiOI nanostructures armed catalytic strips for selective electrochemical and SERS detection of pesticide in polluted water. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 296:118754. [PMID: 34973381 DOI: 10.1016/j.envpol.2021.118754] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/08/2021] [Accepted: 12/24/2021] [Indexed: 06/14/2023]
Abstract
We have constructed a dual mode catalytic strip equipped with 2D BiOI nanostructures and deployed for dual mode detection sensing of hazardous trichlorophenol (TCP). Synthesized BiOI nanostructures are investigated for its crystal architecture, morphology and chemical composition. The BiOI are loaded onto the catalytic strips with the assistance of gravity offered drying process. The BiOI nanostructures offers a very less charge transfer resistance indicating its superior catalytic properties upon the electrochemical impedance studies. It reflected on providing an excellent limit of detection (LOD) and linear sensing range for TCP in electrochemical mode. For SERS, a thin plasmonic Au layer is sputter coated on BiOI equipped catalytic strips (Au@BiOI) for the TCP detection. An impressive enhancement factor of 107 is obtained for SERS detection of TCP with good LOD of 10-10 M. Fabricated dual mode BiOI based strips are thoroughly examined for operational stability and performance in real time conditions. The fabricated high performance dual mode platform for the detection of hazardous pesticides appears to be a promising prospect for the on-the-spot investigation.
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Affiliation(s)
- Ramachandran Balaji
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 106, Taiwan, ROC
| | - Selvarasu Maheshwaran
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 106, Taiwan, ROC
| | - Shen-Ming Chen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 106, Taiwan, ROC.
| | - Elayappan Tamilalagan
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 106, Taiwan, ROC
| | - Narendhar Chandrasekar
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, Tamil Nadu, India
| | - Selvarajan Ethiraj
- Department of Genetic Engineering, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India
| | - Melvin S Samuel
- Department of Material Science and Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, USA
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Venkatesh K, Muthukutty B, Chen SM, Karuppasamy P, Haidyrah AS, Karuppiah C, Yang CC, Ramaraj SK. Spinel CoMn2O4 nano-/micro-spheres embedded RGO nanosheets modified disposable electrode for the highly sensitive electrochemical detection of metol. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Samuel MS, Datta S, Chandrasekar N, Balaji R, Selvarajan E, Vuppala S. Biogenic Synthesis of Iron Oxide Nanoparticles Using Enterococcus faecalis: Adsorption of Hexavalent Chromium from Aqueous Solution and In Vitro Cytotoxicity Analysis. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3290. [PMID: 34947639 PMCID: PMC8705913 DOI: 10.3390/nano11123290] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 11/22/2021] [Accepted: 11/27/2021] [Indexed: 11/27/2022]
Abstract
The biological synthesis of nanoparticles is emerging as a potential method for nanoparticle synthesis due to its non-toxicity and simplicity. In the present study, a bacterium resistant to heavy metals was isolated from a metal-contaminated site and we aimed to report the synthesis of Fe3O4 nanoparticles via co-precipitation using bacterial exopolysaccharides (EPS) derived from Enterococcus faecalis_RMSN6 strains. A three-variable Box-Behnken design was used for determining the optimal conditions of the Fe3O4 NPs synthesis process. The synthesized Fe3O4 NPs were thoroughly characterized through multiple analytical techniques such as XRD, UV-Visible spectroscopy, FTIR spectroscopy and finally SEM analysis to understand the surface morphology. Fe3O4 NPs were then probed for the Cr(VI) ion adsorption studies. The important parameters such as optimization of initial concentration of Cr(VI) ions, effects of contact time, pH of the solution and contact time on quantity of Cr(VI) adsorbed were studied in detail. The maximum adsorption capacity of the nanoparticles was found to be 98.03 mg/g. The nanoparticles could retain up to 73% of their efficiency of chromium removal for up to 5 cycles. Additionally, prepared Fe3O4 NPs in the concentration were subjected to cytotoxicity studies using an MTT assay. The investigations using Fe3O4 NPs displayed a substantial dose-dependent effect on the A594 cells. The research elucidates that the Fe3O4 NPs synthesized from EPS of E. faecalis_RMSN6 can be used for the removal of heavy metal contaminants from wastewater.
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Affiliation(s)
- Melvin S. Samuel
- School of Environmental Science and Engineering, Indian Institute of Technology, Kharagpur 21302, West Bengal, India;
| | - Saptashwa Datta
- Department of Genetic Engineering, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India;
| | - Narendhar Chandrasekar
- Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore 641022, Tamil Nadu, India;
| | - Ramachandran Balaji
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan;
| | - Ethiraj Selvarajan
- Department of Genetic Engineering, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India;
| | - Srikanth Vuppala
- Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza Leonardo da Vinci, 3220133 Milan, Italy
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Kokulnathan T, Rajagopal V, Wang TJ, Huang SJ, Ahmed F. Electrochemical Behavior of Three-Dimensional Cobalt Manganate with Flowerlike Structures for Effective Roxarsone Sensing. Inorg Chem 2021; 60:17986-17996. [PMID: 34747616 DOI: 10.1021/acs.inorgchem.1c02583] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Rational design and construction of the finest electrocatalytic materials are important for improving the performance of electrochemical sensors. Spinel bioxides based on cobalt manganate (CoMn2O4) are of particular importance for electrochemical sensors due to their excellent catalytic performance. In this study, three-dimensional CoMn2O4 with the petal-free, flowerlike structure is synthesized by facile hydrothermal and calcination methods for the electrochemical sensing of roxarsone (RXS). The effect of calcination temperature on the characteristics of CoMn2O4 was thoroughly studied by in-depth electron microscopic, spectroscopic, and analytical methods. Compared to previous reports, CoMn2O4-modified screen-printed carbon electrodes display superior performance for the RXS detection, including a wide linear range (0.01-0.84 μM; 0.84-1130 μM), a low limit of detection (0.002 μM), and a high sensitivity (33.13 μA μM-1 cm-2). The remarkable electrocatalytic performance can be attributed to its excellent physical properties, such as good conductivity, hybrid architectures, high specific surface area, and rapid electron transportation. More significantly, the proposed electrochemical sensor presents excellent selectivity, good stability, and high reproducibility. Besides, the detection of RXS in river water samples using the CoMn2O4-based electrochemical sensor shows satisfactory recovery values in the range of 98.00-99.80%. This work opens a new strategy to design an electrocatalyst with the hybrid architecture for high-performance electrochemical sensing.
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Affiliation(s)
- Thangavelu Kokulnathan
- Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan
| | - Veeramanikandan Rajagopal
- Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Tzyy-Jiann Wang
- Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan
| | - Song-Jeng Huang
- Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Faheem Ahmed
- Department of Physics, College of Science, King Faisal University, P.O. Box 400, Hofuf, Al-Ahsa 31982, Kingdom of Saudi Arabia
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Balaji R, Zheng XH, Chen SM, Renganathan V. The copper oxide nanoflakes modified electrodes for selective and real time electrochemical sensing of caffeine. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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