A5047940961- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Conducting polymers and applications
- Dye analysis and toxicity
- Pesticide Residue Analysis and Safety
- Cephalopods and Marine Biology
- Nanoparticles: synthesis and applications
- Analytical chemistry methods development
- Advanced Chemical Sensor Technologies
Université de Dschang
2018-2024
Abstract In the present work, a simple and economic analytical method based on attapulgite/nafion coated glassy carbon electrode (AT/Naf/GCE) has been developped for electrochemical determination of caffeine. Prior to its use, ionic exchange properties conductivity AT/Naf/GCE were studied by cyclic voltammetry (CV) differential pulse (DPV). Caffeine gave an irreversible oxidation peak around +1.41 V (vs Ag/AgCl reference electrode) in 0.1 M H 2 SO 4 at pH 1.5. The current varied linearly...
In this work, an electrode modified with amino-functionalized clay mineral was used for the electrochemical analysis and quantification of quercetin (QCT). The resulting amine laponite (LaNH2) as modifier a glassy carbon (GCE). organic-inorganic hybrid material structurally characterized using X-ray diffraction, Fourier transformed infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric (TGA) CHN elemental analysis. covalent grafting organosilane to backbone...
An amperometric sensor was developed by depositing a film coating of hydroxyapatite (HA)/L-lysine (Lys) composite material on glassy carbon electrode (GCE). It applied for the detection Nile blue A (NBA). Hydroxyapatite obtained from snail shells and its structural properties before after combination with Lys were characterized using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analyses....
Herein, a convenient method based on fullerene/multiwalled carbon nanotube/Nafion modified glassy electrode (fullerene/MWCNT/Naf/GCE) for the electrochemical determination of caffeine (CAF) is reported. Cyclic voltammetry (CV) and impedance spectroscopy (EIS) were used to study ionic exchange properties conductivity proposed using [Fe(CN)6]3-/4- redox couple. Caffeine gave an irreversible oxidation peak around +1.33 V (vs. Ag/AgCl reference electrode) in HClO4 (pH 1). The linear dependence...
Epinephrine (EP, also called adrenaline) is a compound belonging to the catecholamine neurotransmitter family. It can cause neurodegenerative diseases, such as Alzheimer's disease, Parkinson's Huntington's disease and amyotrophic lateral sclerosis. This work describes an amperometric sensor for electroanalytical detection of EP by using inkjet-printed graphene electrode (IPGE) that has been chemically modified thin layer laponite (La) clay mineral. The ion exchange properties permeability...
Abstract An electrochemical sensor was prepared by modification of glassy carbon electrode (GCE) with an organoclay obtained intercalation smectite‐type clay Sa(Na) dimethydioctadecylammonium ions (DODAB) and polymer alizarin red S (poly[ARS]). The synthesized materials were analyzed physicochemical techniques. fabricated GCE/Sa(DODAB)/poly(ARS) employed toward the detection diuron limit found to be 0.48 μM (0.11 mg/L). Additionally, elaborated exhibit good sensitivity, stability,...
Abstract In order to propose an alternative for the sensors made with complex materials, a cheap and facile electrode material based on preparation of activated carbon from cocoa pods ( Theobroma cacao ) has been proposed electroanalysis xanthine (Xa). Raw (RCP) (ACCP) were prepared characterized by pH at zero point charge, FTIR, SEM/SEM‐mappings, EDX, XRD, Raman spectroscopy, BET/BJH analysis, 13 C NMR, TGA/DSC. RCP ACCP drop coated surface glassy (GCE) cyclic voltammetry electrochemical...
Abstract This research focused on harnessing amino‐functionalized montmorillonite (Mt) clay, achieved through the grafting of [3(2‐aminoethyl)amino]propyltrimethoxysilane (AEP‐TMS), as carbon paste electrode (CPE) modifier for electroanalysis ciprofloxacin (CF). The characterization both Mt and (Mt‐NH 2 ) materials was carried out using various techniques including Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X‐ray diffraction (XRD). Afterwards, CPEs...
Snail shells (Anadora Fulica) calcined at different temperatures were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermal analyses (TG-DTG), scanning electron microscopy (SEM) and N2 adsorption–desorption experiments (surface area measurements found using the coupled BET/BJH method). The principal objective was to identify forms of calcium carbonate hydroxide in snail as raw materials. thus obtained used synthesis hydroxyapatite/L-lysine (HA/Lys)...
This work focuses on the synthesis of silver nanoparticles using fresh cocoa pods from “Theobroma cacao” extract plant through reduction ions (Ag+) into Ag (0) by a green chemistry process, subsequently used as an electrode material. Reaction factors such pH, incubation time, and ion concentration were optimized during formation nanoparticles. The synthesized characterized ultraviolet spectrophotometry (UV-Vis), Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction...
Epinephrine (EP, also called adrenaline) is a compound belonging to the catecholamine neurotransmitter family. It can cause neurodegenerative diseases such as Alzheimer’s disease, Parkinson’s Huntington’s disease and amyotrophic lateral sclerosis. This work describes an amperometric sensor for electroanalysis of EP, based on inkjet-printed graphene electrode (IPGE), modified by thin film laponite (La) clay mineral. The ion exchange properties permeability prepared (denoted La/IPGE) were...