Pdf sensitive determination of paracetamol using a graphene. Electrochemical behavior of promazine at the graphene modified carbonpaste electrode was investigated. Application of a graphene oxidecarbon paste electrode for the. The resulting glassy carbon electrode reduced graphene oxidepoly3,4ethylenedioxythiophene electrode was applied as an electrochemical biosensor for the determination of dopamine in the presence of ascorbic acid and uric acid.
Electrochemical behavior of bisphenola at tolbutamide. Analytical and bioanalytical chemistry 2003, 376 2, 214219. Several reports appeared on the utilization of pure graphene paste electrode gpe, modified gpe and modifications of traditionally prepared. Blending the graphite powder with a pasting liquid forms a. Cost effective, simple and fast solution combustion synthesis was utilized for the synthesis of pure crystalline phase of wurzite zno nanoparticles. Pdf silver nanoparticles decorated graphene modified carbon. Fabrication of graphene nanosheetsmultiwalled carbon nanotubespolyaniline modified carbon paste electrode for simultaneous electrochemical determination of terbutaline sulphate and guaifenesin pramod k. Cyclic voltammograms of 1 mm caffeine in perchloric acid solution ph 0.
Under optimized extraction and analysis conditions, the peak current obtained at the nanomip modified graphenecarbon paste electrode nanomipgcpe was proportional to the chlordiazepoxide concentration within the range from 6. The voltammetric study of thioguanine tg was comparatively investigated on bare, graphene oxide and reduced graphene oxide modified carbon paste electrodes using cyclic cv and square wave stripping swsv voltammetric techniques. Electrochemical polymerised graphene paste electrode and. Carbon paste electrodes modified with graphene oxides. Graphene spces are designed for the development of bio sensors with an enhanced electrochemical active area. In this work, a novel electrochemical sensor was presented for tanshinone iia determination. Voltammetric determination of pyrazinamide at graphene zinc oxide nanocomposite modified carbon paste electrode employing differential pulse voltammetry pk kalambate, cr rawool, ak srivastava sensors and actuators b. The electrochemical behavior of the fabricated electrode was evaluated using cyclic voltammetry and square wave voltammetry. Reduced graphene rgr was synthesized and used as a substrate for immobilization of bacteriophage on the cp surface. The carbon paste electrode was prepared by mixing 70% graphite powder and 30% silicone oil manually using mortar and a dish to get a homogeneous carbon paste. The electrochemical behavior was investigated by studying the electrocatalytic behavior of the ferrocyanide redox couple on its surface by using cyclic voltammetry. Research open access application of a modified graphene. Electrochemical determination of dopamine using a poly3,4. In this work, an electrochemical labelfree dna biosensor was developed for determination of levodopa ld.
Various electrodes, such as graphene, carbon nanotube and nanoparticles modified electrode,, mercury electrode 20,21, carbon paste electrode 22,23, are used for the fqs determination. The electrochemical behavior of paracetamol was investigated at a graphene modified carbon paste electrode by cyclic voltammetry in an ammonium buffer solution ph 8. Gold nano particle and reduced graphene oxide composite modified carbon paste electrode for the ultra trace detection of arsenic iii srikant sahoo analytical chemistry division, bhabha atomic research centre, trombay, mumbai, 400085 india. However, prior to the experiments, this electrode was cathodically pretreated in a 0. Modified paste electrode such as polymer and surfactant modified carbon nanotube paste electrode 38,39, polymer proline modified graphene paste electrode and carbon paste electrodes modified with carbon nanotubesmetal nanoparticle 41,42, graphenemetal nanoparticle 43,44, metal oxide nanoparticles and their complexes 45,46, macromolecule polymer,, surfactant and organic electroactive molecules can also enhance the sensitivity of electrodes. An email protected graphene modified carbon paste electrode as a. Preparation of alanine and tyrosine functionalized graphene oxide nanoflakes and their modified carbon paste electrodes for the determination of dopamine. Cyclic voltammetry cv and differential pulse voltammetry dpv methods were used to analyze the prepared electrode. Carbon paste electrodes cpe are widely used as an electrode material for the development of various electrochemical sensors and biosensors and they can be simply modified. The main advantages of carbon paste electrode are due to easy way of preparation, the new reproducible surface and low residual current in wide potential windows.
New carbon paste electrode modified with graphenetio2. Bdd electrode for acetaminophen and caffeine simultaneous determination. For comparison, 2,7bf modified cpe 2,7bfcpe without g, g paste electrode gpe without 2,7bf. Voltammetric determination of diclofenac sodium using. Fadaeian, voltammetric determination of isoproterenol using a graphene oxide nano sheets paste electrode, j.
Pdf sensitive determination of paracetamol using a. Electrochemical sensor based on a carbon paste electrode. Carbon paste electrodes belong to a special group of heterogeneous carbon electrodes. These electrodes are simple to make and offer an easily renewable surface for electron exchange. Electrochemical tyrosine sensor based on a glassy carbon. A nanomolecularly imprinted polymer was synthesized by using silanized magnetic graphene oxide fe3o4gosio2 as a nanofiller material with molecular recognition capacity. Novel signalamplified fenitrothion electrochemical assay. However, for highly doped graphene r s can be reduced to 62.
Silver nanoparticles decorated graphene modified carbon paste electrode for molecular methimazole determination. Graphene nanosheet prepared from graphite via a modified hummers method was used to design a graphene modified carbon paste electrode gcpe. Graphene oxide go modified electrode for dopamine sensing. C1110gph dropsens launches screenprinted carbon electrodes spces modified with graphene as a carbon based nanomaterial. The biosensor was constructed using reduced graphene oxide decorated with fe 3 o 4 magnetic nanoparticles rgofe 3 o 4 on a carbon paste electrode cpe and doublestranded deoxyribonucleic acid dna dnargofe 3 o 4cpe. Copper nanoparticles incorporating a cationic surfactant. A multilayer graphene paste electrode mgpe, consisting of graphene flakes and mineral oil, was modified with activated carbon ac. A carbon paste electrode modified by graphene oxidefe 3 o 4. Graphene paste electrode was particularly used for the determination of bioactive molecules because of the easy fabrication of polymer modified electrode, reclaimable and good response and less background current 1 s. When necessary, a new surface was obtained by pushing an excess of the paste out of the tube and polishing with a weighing paper.
Graphene, a risingstar carbon material has attracted enormous interest in science communities and a promising candidate in many fields such as nanomaterials, supercapacitors, nanoelectronics, catalysis, nanophotonics, and sensors. Carbon paste electrode was modified with vanadium pentoxide v 2 o 5 and titanium dioxide tio 2 nanoparticles and graphene tvgcpe. Nickel oxide nioreduced graphene oxide rgo composite. However, simultaneous determination of two antibiotic fluoroquinolones with electrochemical method is fewer reported.
Pdf electrocatalytic determination of captopril using a. Carbon paste electrode modified with copperii phosphate immobilized in a polyester resin for voltammetric determination of l ascorbic acid in pharmaceutical formulations. May 28, 2014 electrochemical sensors and biosensors for pharmaceutical, food, agricultural and environmental analyses have been growing rapidly due to electrochemical behavior of drugs and biomolecules and partly due to advances in electrochemical measuring systems. Among the various mediators used for electrode modification, solid metal hexacyanoferrates. Graphene oxide modified electrodes for dopamine sensing. In the present work, we describe the preparation of a new electrode composed of graphen g modified with 2,7bisferrocenyl ethyl fluoren9. Herein, we introduce a novel modification process for carbon paste electrode by magnetic coreshell nanocomposite of graphene. A carbon paste electrode is a particular type of electrochemical sensor widely used in voltammetric experiments. A carbon paste electrode cpe is made from a mixture of conducting graphite powder and a pasting liquid. Journal of analytical science and technology, sep 2014. Application of a modified graphene nanosheet paste electrode for. Abstract the voltammetric study of thioguanine tg was comparatively investigated on bare, graphene oxide and reduced graphene oxide. The paste was then packed into the cavity of a carbon paste electrode and smoothed on a weighing paper.
Hummers method and coprecipitation followed by reduction method were used for facile, simple and costeffective preparation for the modifier graphite. The asprepared electrode was prepared by electrodepositing a reduced graphene oxide film onto a carbon paste electrode modified with gold nanoparticles, which combined the advantages of both gold nanoparticles and electrochemically reduced graphene oxide. Gold nano particle and reduced graphene oxide composite. Introduction to date various inorganic materials,1 organometals2 and polynuclear cyanometalate344 have been used to make modified electrodes mes. A carbon paste electrode cpe was modified with nferrocenylmethylidenefluorene2amine and graphene zno nanocomposite. Uptodate graphene and graphene oxidemodified carbon paste electrodes have been. Electrochemical properties of eugenol were investigated on a graphene modified carbon paste electrode cpe by using voltammetric methods, which exhibited a welldefined irreversible peak at about. Designing an aureduced graphene oxide modified carbon. Mno2 nanowiresdecorated reduced graphene oxide modified. Design and construction of a carbon paste electrode modified. A new voltammetric sensor according to graphene quantum dots. Both carbon paste electrodes and square wave voltammetry swv are very popular in.
Graphene based carbon layered electrode array technology for neural imaging and optogenetic applications. A novel carbon paste electrode modified with graphene oxide nanosheets and an ionic liquid nhexyl3methylimidazolium hexafluoro phosphate was fabricated behavior of graphene doped carbon paste electrode and its. Preparation of bare and modified carbon paste electrode. Abstractpoly3,4ethylenedioxythiophene was deposited on a reduced graphene oxidedecorated glassy carbon electrode through an electrochemical polymerization.
For the first time, we developed a simple, rapid and inexpensive method for the investigation of agnuside electrochemical behavior by designing a goldreduced graphene oxide carbon paste electrode aurgocpe. The ac was produced from coconut husk using zinc chloride as the activating agent. Preparation and characterization of carbon paste electrode. Oct 29, 2019 a simple, nickel oxidereduced graphene oxide composite modified carbon paste electrode niorgomcpe was fabricated as an electrochemical sensor for the sensitive determination of dopamine da. Application of a modified graphene nanosheet paste electrode for voltammetric determination of methyldopa in urine and pharmaceutical formulation. Graphenebased transparent conductive electrodes sigmaaldrich. Electrochemical determination of levodopa on carbon paste. The commercial few layer graphene and zno modifiers were.
Mar 27, 2019 in the present work, we demonstrate the electrocatalytic activity of few layer graphene and wurzite zno nanoparticles modified carbon paste electrode towards the oxidation of dopamine. In this study, a novel nanomolecularly imprinted polymer was synthesized and used to prepare modified carbon paste electrodes. Novel graphene modified carbonpaste electrode for promazine. Pdf an electrochemical sensor based on reduced graphene. Manganese dioxidemodified carbon paste electrode for. Electroanalytical approach for determination of tanshinone. Mar 22, 2016 novel signalamplified fenitrothion electrochemical assay, based on glassy carbon electrode modified with dispersed graphene oxide. Agnuside despite its good properties for the body, can be harmful to the kidneys in extra concentrations. Graphenebased carbonlayered electrode array technology for. The electrooxidation of captopril cap at the surface of the modified electrode was studied using electrochemical.
Onepot synthesis of graphenechitosan nanocomposite modified. Encouraged by the above, the present work reported on the successful use of a graphene prepared from graphite in the fabrication of an efficient graphenemodified carbonpaste electrode gcpe. A comparative study of lead oxide modified graphite paste. Pdf electrochemical oxidation mechanism of eugenol on.
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