A new sensor based on an amino-montmorillonite-modified inkjet-printed graphene electrode for the voltammetric determination of gentisic acid

Dongmo, Liliane M.; Guenang, Léopoldine S.; Jiokeng, Sherman Lesly Zambou; Kamdem, Arnaud T.; Doungmo, Giscard; Victor, Bassetto C.; Jović, Milica; Lesch, Andreas; Tonlé, Ignas Kenfack; Girault, Hubert H.

doi:10.1007/s00604-020-04651-7

Cited by 10 publications

(4 citation statements)

References 58 publications

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“…The band at 1628 cm −1 corresponds to the bending vibration mode of water. At 535 cm −1 , another band is observed which is attributed to the overlapping of the Si-O and Mg(OH) vibrational modes as observed in magnesium-based and trioctahedral clays [ 53 , 54 , 55 ]. However, the presence of new bands observed for the synthetic amino clay corresponds to all the vibrations of the surface organosilane functions.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of an Organofunctionalized Talc-like Magnesium Phyllosilicate for the Electrochemical Sensing of Lead Ions in Water Samples

et al. 2022

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A talc-like magnesium phyllosilicate functionalized with amine groups (TalcNH2), useful as sensor material in voltammetry stripping analysis, was synthesized by a sol–gel-based processing method. The characterizations of the resulting synthetic organoclay by scanning electron microscopy (SEM), X-ray diffraction, N2 sorption isotherms (BET method), Fourier transform infrared spectroscopy (FTIR), CHN elemental analysis and UV–Vis diffuse reflectance spectroscopy (UV–Vis-DRS) demonstrated the effectiveness of the process used for grafting of amine functionality in the interlamellar clay. The results indicate the presence of organic moieties covalently bonded to the inorganic lattice of talc-like magnesium phyllosilicate silicon sheet, with interlayer distances of 1568.4 pm. In an effort to use a talc-like material as an electrode material without the addition of a dispersing agent and/or molecular glue, the TalcNH2 material was successfully dispersed in distilled water in contrast to natural talc. Then, it was used to modify a glassy carbon electrode (GCE) by drop coating. The characterization of the resulting modified electrode by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) revealed its charge selectivity ability. In addition, EIS results showed low charge transfer resistance (0.32 Ω) during the electro-oxidation of [Fe(CN)6]3−. Kinetics studies were also performed by EIS, which revealed that the standard heterogeneous electron transfer rate constant was (0.019 ± 0.001) cm.s−1, indicating a fast direct electron transfer rate of [Fe(CN)6]3− to the electrode. Using anodic adsorptive stripping differential pulse voltammetry (DPV), fast and highly sensitive determination of Pb(II) ions was achieved. The peak current of Pb2+ ions on TalcNH2/GCE was about three-fold more important than that obtained on bare GCE. The calculated detection and quantification limits were respectively 7.45 × 10−8 M (S/N = 3) and 24.84 × 10−8 M (S/N 10), for the determination of Pb2+ under optimized conditions. The method was successfully used to tap water with satisfactory results. The results highlight the efficient chelation of Pb2+ ions by the grafted NH2 groups and the potential of talc-like amino-functionalized magnesium phyllosilicate for application in electrochemical sensors.

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Section: Resultsmentioning

confidence: 99%

Fabrication of an Organofunctionalized Talc-like Magnesium Phyllosilicate for the Electrochemical Sensing of Lead Ions in Water Samples

et al. 2022

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“…Gallic acid (3,4,5-thihydroxybrnzoic acid, GA) is a natural phenolic component with a simple chemical structure and low toxicity, and is found in vegetables, fruits, and green tea. Since GA possesses anti-mutagenic, antibacterial and antiaging properties, [1][2][3] and has a favorable preventive effect on several diseases, it has attracted increasing attention for application in food, cosmetics, medicines, etc. 4,5 Unfortunately, excessive intake of GA is harmful to the human body, leading to various diseases, such as dizziness, fatigue, headache, and stomach upset.…”

Section: Introductionmentioning

confidence: 99%

A novel electrochemical sensor based on an Fe–N–C/AuNP nanohybrid for rapid and sensitive gallic acid detection

Zhang

et al. 2023

New J. Chem.

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“…In these fields, Materials 2022, 15, 4262 2 of 17 solid electrodes chemically modified by convenient inorganic materials, likely to display great affinity for a target species, are usually used. Some common examples of such materials are silica [13,14], clay minerals [15,16], various carbon derivatives [17][18][19][20], and metal oxides [21,22]. Furthermore, additional studies also have highlighted the use of conjugated organic polymers (conductive polymers) as electrode modifiers in the fabrication of modified electrodes for the electroanalysis of various analytes [23,24].…”

Section: Introductionmentioning

confidence: 99%

Hydroxyapatite/L-Lysine Composite Coating as Glassy Carbon Electrode Modifier for the Analysis and Detection of Nile Blue A

et al. 2022

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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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A new sensor based on an amino-montmorillonite-modified inkjet-printed graphene electrode for the voltammetric determination of gentisic acid

Cited by 10 publications

References 58 publications

Fabrication of an Organofunctionalized Talc-like Magnesium Phyllosilicate for the Electrochemical Sensing of Lead Ions in Water Samples

Fabrication of an Organofunctionalized Talc-like Magnesium Phyllosilicate for the Electrochemical Sensing of Lead Ions in Water Samples

A novel electrochemical sensor based on an Fe–N–C/AuNP nanohybrid for rapid and sensitive gallic acid detection

Hydroxyapatite/L-Lysine Composite Coating as Glassy Carbon Electrode Modifier for the Analysis and Detection of Nile Blue A

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