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Zattim CA, Kavazoi HS, Miyazaki CM, Alessio P. Investigating layer-by-layer films of carbon nanotubes and nickel phthalocyanine towards diquat detection. Sci Rep 2024; 14:16582. [PMID: 39019944 PMCID: PMC11255320 DOI: 10.1038/s41598-024-67601-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: 02/28/2024] [Accepted: 07/12/2024] [Indexed: 07/19/2024] Open
Abstract
The indiscriminate use of pesticides makes us susceptible to the toxicity of these chemical compounds, which may be present in high quantities in our food. It is crucial to develop inexpensive and rapid methods for determining these pesticides for government control or even for the general population. In this study, we investigated the fabrication of self-assembled LbL films using multi-walled carbon nanotubes (MWCNT) and nickel tetrasulphonated phthalocyanine (NiTsPc) as an electrochemical sensor for the herbicide Diquat (DQ). The Layer-by-Layer (LbL) assembly of the (MWCNT/NiTsPc) film was examined, along with its structural and morphological characteristics. The effect of the number of layers in DQ detection was evaluated by cyclic voltammetry, followed by the detection through differential pulse voltammetry. The achieved limit of detection was 9.62 × 10-7 mol L-1. A ~ 30% decrease in sensitivity was observed in the presence of Paraquat, a banned herbicide and electrochemical interferent due to the structural similarities, which is regularly neglected in the most published studies. The sensor was tested in real samples, demonstrating a recovery of 98.5% in organic apples.
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Affiliation(s)
- Cristiano A Zattim
- Department of Physics, School of Technology and Sciences, São Paulo State University (UNESP), 305 Roberto Simonsen St-Jardim das Rosas, Presidente Prudente, SP, CEP 19060-900, Brazil
| | - Henry S Kavazoi
- Department of Physics, School of Technology and Sciences, São Paulo State University (UNESP), 305 Roberto Simonsen St-Jardim das Rosas, Presidente Prudente, SP, CEP 19060-900, Brazil
| | - Celina M Miyazaki
- Department of Physics, School of Technology and Sciences, São Paulo State University (UNESP), 305 Roberto Simonsen St-Jardim das Rosas, Presidente Prudente, SP, CEP 19060-900, Brazil.
| | - Priscila Alessio
- Department of Physics, School of Technology and Sciences, São Paulo State University (UNESP), 305 Roberto Simonsen St-Jardim das Rosas, Presidente Prudente, SP, CEP 19060-900, Brazil.
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Tu Z, Tian F, Li X, Tian D, Li R, Wu Z. Cyclodextrin functionalization enhancement in a CA-β-CD/g-C 3N 4/Ag 2CO 3 Z-type heterojunction towards efficient photodegradation of organic pollutants. REACT CHEM ENG 2023. [DOI: 10.1039/d3re00025g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
More free radicals can be produced quickly by CA-β-CD/CN/Ag2CO3, leading to more effective and stable photocatalytic activity. The interfacial charge separation has been improved by the CA-β-CD modified CN/Ag2CO3 heterojunction.
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Affiliation(s)
- Zhuo Tu
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Fei Tian
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Xue Li
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Duoduo Tian
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Runze Li
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
| | - Zhansheng Wu
- School of Environmental and Chemical Engineering, Xi'an Laboratory of Textile Chemical Engineering Auxiliaries, Xi'an Polytechnic University, Xi'an 710048, PR China
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Physicochemical studies of iron/vanadate doped hydroxyapatite/polycaprolactone nanofibers scaffolds. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hydroxyapatite/L-Lysine Composite Coating as Glassy Carbon Electrode Modifier for the Analysis and Detection of Nile Blue A. MATERIALS 2022; 15:ma15124262. [PMID: 35744321 PMCID: PMC9230729 DOI: 10.3390/ma15124262] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/09/2022] [Accepted: 06/13/2022] [Indexed: 12/13/2022]
Abstract
An amperometric sensor was developed by depositing a film coating of hydroxyapatite (HA)/L-lysine (Lys) composite material on a glassy carbon electrode (GCE). It was applied for the detection of Nile blue A (NBA). Hydroxyapatite was obtained from snail shells and its structural properties before and after its combination with Lys were characterized using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) surface area analyses. The coupling of Lys to HA was attributed to favorable interaction between negatively charged -COO- groups of Lys and divalent ions Ca2+ of HA. Electrochemical investigations pointed out the improvement in sensitivity of the GCE/Lys/HA sensor towards the detection of NBA in solution. The dependence of the peak current and potential on the pH, scan rate, and NBA concentration was also investigated. Under optimal conditions, the GCE/Lys/HA sensor showed a good reproducibility, selectivity, and a NBA low detection limit of 5.07 × 10-8 mol L-1. The developed HA/Lys-modified electrode was successfully applied for the detection of NBA in various water samples.
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Freitas A, Vieira I. Detection of carbendazim in natural waters using a sensor based on magnetite nanoparticles modified with ascorbic acid/β‐cyclodextrin. ELECTROANAL 2022. [DOI: 10.1002/elan.202100700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Tchoffo R, Ngassa GBP, Doungmo G, Kamdem AT, Tonlé IK, Ngameni E. Surface functionalization of natural hydroxyapatite by polymerization of β-cyclodextrin: application as electrode material for the electrochemical detection of Pb(II). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:222-235. [PMID: 34342829 DOI: 10.1007/s11356-021-15578-8] [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: 04/22/2021] [Accepted: 07/18/2021] [Indexed: 06/13/2023]
Abstract
A composite material prepared by polymerization of β-cyclodextrin (β-CD) on the surface of natural hydroxyapatite using citric acid as cross linker, was employed as electrode material for the detection of Pb(II). Hydroxyapatite was obtained from bovine bones, following a three-step procedure including pre-calcination, chemical treatment with (NH4)2HPO4, and calcination. The structure and morphology of the pristine hydroxyapatite (NHAPP0.5) and its functionalized counterpart (NHAPp0.5-CA-β-CD) were examined using XRD, FTIR, and SEM. Upon deposition as thin film on a glassy carbon electrode (GCE), the ion exchange ability of NHAPp0.5-CA-β-CD was exploited to elaborate a sensitive sensor for the detection of lead. The electroanalytical procedure was based on the chemical accumulation of Pb(II) ions under open-circuit conditions, followed by the detection of the preconcentrated species using differential pulse anodic stripping voltammetry. The reproducibility of the proposed method, based on a series of 8 measurements in a solution containing 2 μM Pb(II) gave a coefficient of variation of 1.27%. Significant parameters that can affect the stripping response of Pb(II) were optimized, leading to a linear calibration curve for lead in the concentration range of 2 × 10-8 mol L-1 - 20 × 10-8 mol L-1 (R2 = 0.998). The detection limit (3S/m) and the sensitivity of the proposed sensor were 5.06 × 10-10 mol L-1 and 100.80 μA.μM-1, respectively. The interfering effect of several ions expected to affect the determination of lead was evaluated, and the proposed sensor was successfully applied in the determination of Pb(II) ions in spring water, well water, river water and tap water samples.
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Affiliation(s)
- Rodrigue Tchoffo
- Laboratory of Analytical Chemistry, Faculty of Science, The University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon
| | - Guy B P Ngassa
- Laboratory of Analytical Chemistry, Faculty of Science, The University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon.
- Department of Chemistry, University of Douala, P.O. Box 24157, Douala, Cameroon.
| | - Giscard Doungmo
- Institute of Inorganic Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straβe 2, 24118, Kiel, Germany
| | - Arnaud T Kamdem
- Freiburg Materials Research Center (FMF), University of Freiburg, Stefan Meier Strasse 21, 79104, Freiburg, Germany
| | - Ignas K Tonlé
- Laboratory of Analytical Chemistry, Faculty of Science, The University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon.
- Chemistry of Materials and Electrochemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon.
| | - Emmanuel Ngameni
- Laboratory of Analytical Chemistry, Faculty of Science, The University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon
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Fast and Efficient Removal of Uranium onto a Magnetic Hydroxyapatite Composite: Mechanism and Process Evaluation. Processes (Basel) 2021. [DOI: 10.3390/pr9111927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The exploration and rational design of easily separable and highly efficient sorbents with satisfactory capability of extracting radioactive uranium (U)-containing compound(s) are of paramount significance. In this study, a novel magnetic hydroxyapatite (HAP) composite (HAP@ CoFe2O4), which was coupled with cobalt ferrite (CoFe2O4), was rationally designed for uranium(VI) removal through a facile hydrothermal process. The U(VI) ions were rapidly removed using HAP@ CoFe2O4 within a short time (i.e., 10 min), and a maximum U(VI) removal efficiency of 93.7% was achieved. The maximum adsorption capacity (Qmax) of the HAP@CoFe2O4 was 338 mg/g, which demonstrated the potential of as-prepared HAP@CoFe2O4 in the purification of U(VI) ions from nuclear effluents. Autunite [Ca(UO2)2(PO4)2(H2O)6] was the main crystalline phase to retain uranium, wherein U(VI) was effectively extracted and immobilized in terms of a relatively stable mineral. Furthermore, the reacted HAP@CoFe2O4 can be magnetically recycled. The results of this study reveal that the suggested process using HAP@CoFe2O4 is a promising approach for the removal and immobilization of U(VI) released from nuclear effluents.
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Salehpour N, Bayatloo MR, Nojavan S. Magnetic solid-phase extraction of high molecular weight peptides using stearic acid-functionalized magnetic hydroxyapatite nanocomposite: determination of some hypothalamic agents in biological samples. Anal Bioanal Chem 2021; 413:7609-7623. [PMID: 34668043 DOI: 10.1007/s00216-021-03725-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 10/05/2021] [Accepted: 10/07/2021] [Indexed: 10/20/2022]
Abstract
Therapeutic peptides have an important effect on physiological function and human health, so it is momentous to quantify and detect low levels of these biomolecules in biological samples for treatment and diagnostic purposes. In the present study, an efficient magnetic solid-phase extraction (MSPE) method was developed based on stearic acid-functionalized magnetic hydroxyapatite nanocomposite (MHAP/SA) as a novel and cost-effective adsorbent for extraction of five hypothalamic-related peptides (goserelin, octreotide, triptorelin, somatostatin, and cetrorelix) from biological samples. To characterize the morphology and physicochemical properties of MHAP/SA, Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDS), field emission scanning microscopy (FE-SEM), CHNS elemental analysis, Brunauer-Emmett-Teller (BET), and vibrating sample magnetometry (VSM) were applied. Under optimum conditions, the proposed method (MSPE-HPLC-UV) represented favorable linearity with R2 ≥ 0.9987, suitable intra- and inter-day precisions (RSD ≤ 6.9% and RSD ≤ 8.1%, respectively, n = 3), and limits of detection and quantification in the range of 0.75-1.12 ng mL-1 and 2.50-3.75 ng mL-1, respectively. Eventually, the proposed method was used for the extraction and quantification of target therapeutic peptides in plasma and urine samples, and satisfactory relative recoveries were achieved in the range of 90.6-110.3%.
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Affiliation(s)
- Niloofar Salehpour
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, G. C., Evin, 1983969411, Tehran, Iran
| | - Mohammad Reza Bayatloo
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, G. C., Evin, 1983969411, Tehran, Iran
| | - Saeed Nojavan
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, G. C., Evin, 1983969411, Tehran, Iran.
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