The electrochemical oxidation of cefixime at such electrodes was investigated using the cyclic voltammetric and amperometric techniques. Preconcentration and electroanalysis of copper at zeolite modified carbon paste electrode. In one electrode, graphite was replaced by linde molecular sieve zeolite 4a za and, in. Agdoped zeolite modified expanded graphite composite electrode agzege was prepared and applied for the electrochemical determination of nitrate anion from aqueous solution. Effective electrofenton degradation of reactive black 5. Zeolites have the capacity to be completely hydrated and dehydrated without damage to the crystalline lattice 1. Determination of copper by zeolite molecular sieve modified. A zeolite modified carbon paste electrode based on copper exchanged clinoptilolite nanoparticles for voltammetric determination of metronidazole elahe shahnazarishahrezaie ab and alireza nezamzadehejhieh abc a department of chemistry, shahreza branch, islamic azad university, p. Gce was prepared by evaporation of solvent from dispersion of. Table 1 main reported methods for use of zeolites in electrochemistry and design of zeolite modi. Cyclic voltammetry is used to quantify the accumulated ions. A simple and an effective catalyst for determination of. Gce was prepared by evaporation of solvent from dispersion of the zeolitegraphite mixture with the polymer in acetone. Gce was prepared by evaporation of solvent from dispersion of the zeolite graphite mixture with the polymer in acetone.
Carbon materials in the forms of graphite, glassy carbon, carbon fibers, carbon nanotubes, etc. Determination of copper by zeolite molecular sieve. Carbon paste electrode modified imprinted zeolite have been developed as a sensor to analyze creatine by potentiometry. With this mixture as the electrode material, oxidation of hydroxide ions was studied by cyclic voltammetry. The electrode surface was polished on a lens paper. Zeolite modified carbon paste electrode has good precision and accuration. Among the class of synthetic zeolites, zeolite a is considered one of the most important. Synthesis and applications of molecular sieve layers and membranes. A potentiometric sensor for nitrogen oxide no x measurement based on yttriastabilized zirconia with a zeolite modified electrode is presented. Zeolitemodified solgel electrode as an electrochemical. Electrochemical response as a probe of intracrystalline cationexchange dynamics in zeolites x and y chandana senaratne, and mark d. Using the cyclic voltammetric technique, the electrochemical oxidation of hydrogen peroxide at such electrodes was investigated.
Orozco, sl, bandala, er, arancibiabulnes, ca, serrano, b. The relativestandard deviation of the response to 4. Their electrochemical behavior was first evaluated by ionexchange voltammetry using methylviologen as a model redox probe, indicating better performance in comparison to the corresponding zeolite. Modified electrode based on zeoliteencapsulated criii complex. Determination of mercuryii using a modified electrode. Pdf carbon paste electrode incorporating calciumexchanged. International journal of analytical chemistry hindawi. The journal of physical chemistry 1996, 100 14, 58495862. Table 1 main reported methods for use of zeolites in electrochemistry and design of zeolitemodi. Electrochemical sensor based on low silica x zeolite modified. Voltammetric determination of paracetamol in tablet. Zeolitemodified electrodes and electrodemodified zeolites. Pdf voltammetric determination of paracetamol in tablet.
A simple and effective zeolite modified electrode zme was constructed from cuiiexchanged clinoptilolite nanoparticles cuiicnp. They are based either on the physical anchoring of zeolite particles on the surface of solid carbon paste the viscosity of which can be tuned by temperature change or controlled dissolution by an organic solvent, or on the dispersion of zeolite particles in the bulk of a carbon paste matrix containing solid paraffin as a binder. Pdf on jul 31, 2003, alain walcarius and others published 4. Carbon paste electrode modified imprinted zeolite as a. In the present work, nickel zeolite modified carbon paste electrode nizmcpe was prepared. Iron iii doped zeolite graphite composite modified glassy carbon electrode was prepared for determination of uric acid in human urine samples.
Zeolite modified electrodes and electrode modified zeolites rolison is known for her research on the modification of electrode surfaces with zeolites. In order to use the modified zeolite as the electrode material, the zeolite sample was homogeneously dispersed in 5 wt. It is found that acidtreatment doesnt affect significant structural and morphological changes apart from formation of hydroxyl. Electrocatalytic characteristics of uric acid oxidation at. A carbon paste electrode modified with zeolite was employed for quantities of copper. Evaporation of zeolite polymer suspensions zeolite polystyrene composite. The agzege exhibited the electrocatalytic activity towards the cathodic. Experiments on zeolite show that it is not electrochemically active. Three zeolites were used, linde type a za, faujasite zy, and mfi zsm5.
The electrochemical behaviour of hydrogen peroxide at the surface of modified electrode was investigated by cyclic voltammetry and chronoamperometry in 0. Supporting information modified electrode electrocatalytic. Anew zeolite modified electrode was prepared by using zeolite polyvinyl as amodifier on gce. Voltammetric measurements figure 2 depicts a detail of cvs of egagzepoxy composite electrode in 0. The electrochemical behaviour of nitrate anions on the electrode was investigated by cyclic voltammetry in 0. In recent decades, zeolite modi ed electrodes zmes have been widely used in determination of di. The catalytic electrochemical oxidation of urea on egagzepoxy electrode was investigated. Imprinted zeolite iz was synthesized by mole ratio of creatinesi of 0. Electrochemical characterization of iron iii doped zeolite. Electrochemical impedance spectroscopic and cyclic voltammetric results confirmed surface modification of the surface of glassy carbon electrodes. Surface phenomena, kinetics and thermodynamics studies sanghratna waghmare, tanvir arfin, sadhana rayalu, dilip lataye, samujjwala dubey, sangeeta tiwari. Natural zeolites in water treatment how effective is their use 83 1. A zeolite modified carbon paste electrode based on copper.
Zeolite modified electrodes zmes have been drawing attention as chemically modified electrodes cmes because of synergistic combination of zeolite features with electrochemical interfaces 912. Zme can be exploited as electrochemical sensors in relation with zeolite s properties, e. The unmodified electrode carbon pastecpe was prepared with similar way without adding zeolite. Researcharticle electrochemical characterization of iron iii doped zeolite graphite composite modified glassy carbon electrode and its application for adsasswv determination of. Electrodes based on zeolites modified with cobalt andor. Adsorption behaviour of modified zeolite as novel adsorbents. The synthesis of criii complexes encapsulated in supercages of y zeolite was carried out by free diffusion of the pan 12pyridylazo2naphtol ligand figure 1 through the zeolite pores exchanged with the criii metal ion, obtained by the previous use of the biosorption process 5. Electrical contact was established via the contact between the paste, the copper tube and the disk arbor. As the increased of hno 3 modified zeolite dosage ranged from 0. Zeolitemodified electrodes with analytical applications. The electrochemical characterization of nizmcpe exhibits redox behavior of niiiiniii couple in alkaline. The response is characterized with respect to preconcentration, ph, and other variables.
Zeolite graphite composite modified glassy carbon electrode and its application for adsasswv determination of uric acid in human urine mearegamare. Romanian agdoped zeolite is shown in the inset of figure 1 for comparison. Zeolitemodified solid carbon paste electrodes springerlink. A sensitive and selective voltammetric method using feiii encapsulated zeolite graphite composite modified glassy carbon electrode is presented in this work for the determination of paracetamol in tablet formulations. The modifier was characterized by ftir, bet, xrd and tem techniques. Intra versus extrazeolite electron transfer chandana senaratne, j. Modified lanthanumzeolite for sensitive electrochemical. Biosensors based on nanogold zeolite modified ion selective fieldeffect transistors for creatinine detection berna ozansoy kasap1, svitlana v.
Cobalt impregnated zeolitemodified electrode was prepared by mixing cobaltzeolite coz and graphite powder with different percentages. The carbon electrode with zeolite denoted as a zeolite modified carbon electrode zmce was prepared by the slurry and pasting method with zeolite particles and carbon black. The synthesis of criii complexes encapsulated in supercages of y zeolite was carried out by free diffusion of the pan 12pyridylazo2naphtol ligand figure 1 through the zeolite pores exchanged with the criii metal ion, obtained by. The zeolite modified electrodes were prepared as described elsewhere.
With the purpose of obtaining inexpensive electrodes for the degradation of organic pesticides by the electrofenton reaction, the required h 2 o 2 being obtained by the 2electron reduction of dissolved o 2, we have prepared glassy carbon electrodes coated with a mixture of graphite with mo andor co modified zeolites. Electrochemical characterization of iron iii doped. Gce were conducted by electrochemical impedance spectroscopy and cyclic voltammetry. Zeolitemodified paraffinimpregnated graphite electrode. Carbon paste electrode incorporating calciumexchanged zeolite modified with methylene blue for amperometric detection. Electrocatalytic reduction of phch2cl on agzsm5 zeolite modified electrode guojiao sui, qilong sun, di wu, wangjun meng, huan wang, jiaxing lu shanghai key laboratory of green chemistry and chemical processes, school of chemistry and molecular engineering, east china normal university, shanghai 200062, china 1. This paper describes a new kind of zeolite modified electrodes zmes based on the physical immobilization of zeolite particles onto the surface of paraffinimpregnated graphite electrodes piges. Characterization of immobilization of an enzyme in a modified y zeolite matrix and its application to an amperometric glucose biosensor. Zmce exhibited a significantly enhanced efficiency in the removal of divalent ions in softening using the cdi process compared to the normal softening process based on. Simultaneousselective detection of dopamine and ascorbic. Determination of copper by zeolite molecular sieve modified electrode 597 procedure for the voltammetric experiment 40 ml of scanning solution were placed in the cell.
The purpose of this work is to evaluate the electroanalytical performance of ag doped zeolite modified expanded graphite composite electrode agzege for the determination of nitrate anion. Electrochemical behavior of carbon paste electrode modified with ni ii zeolite and its application for electrocatalytic oxidation of methanol. Oxidation of hydroxide ions at platinummodified zeolite. Zeolite coatings on conventional electrode substrates a1.
The modified electrode, labeled agygc, was air dried. Preconcentration and electroanalysis of copper at zeolite modified. Electrochemical determination of nitrate from water sample. The mixture of zeolite and graphite has been proposed in various forms since the 1980s 7, leading to a class of electrodes named zeolite modified electrodes zmes 8. A conventional three electrode system was employed with a bare gce 3 mm in diameter, ch instruments, inc, or iron iii doped zeolite graphite composite modified glassy carbon electrode fzgcgce as working electrode, silversilver chloride agagcl as reference electrode and a platinum coil as a counter electrode. Biosensors based on nanogoldzeolitemodified ion selective. A cap member comprising yttriastabilized zirconia closes one end of the tube.
Two different zeolitemodified electrodes were employed in the study. A potentiometric sensor of the present invention comprises a tube having an interior and an exterior. Evaporation of zeolitepolymer suspensions zeolitepolystyrene composite. The concentration of cuii in waste water of gong fabrication, using carbon paste electrode modified with zeolite is 93. The zeolitemodified carbon paste electrode sciencedirect. May 10, 2019 a conventional three electrode system was employed with a bare gce 3 mm in diameter, ch instruments, inc, or iron iii doped zeolite graphite composite modified glassy carbon electrode fzgcgce as working electrode, silversilver chloride agagcl as reference electrode and a platinum coil as a counter electrode. First, the electrochemical behavior of iron iii incorporated in the zeolite y modified electrode. Zeolitemodified solid carbon paste electrodes request pdf.
Zeolitemodified electrodes gion calzaferri, research. In the electrochemical fields the zeolites have been used in electrocatalysis and. Chemically modified carbon paste electrodes are prepared by incorporating appropriate quantities of a zeolite directly into the paste mixture. May 12, 2016 in the present work, nickel zeolite modified carbon paste electrode nizmcpe was prepared. An efficient amperometric sensor for hydrogen peroxide by.
Pdf zeolitemodified electrodes zmes have been widely investigated because of their chemical, physical, and structural characteristics shape, size. Zeolite used in this study was ts1 type zeolite that was synthesized with mole ratio of teos, tbot, tpaoh, and h 2 o of 1. The electrochemical behavior of paracetamol pct both at unmodified glassy carbon electrode and feiii doped zeolite graphite composite modified gc electrode fzggce has been investigated. Trace levels of mercuryii can be preconcentrated on these electrodes. Natural zeolites in water treatment how effective is. A potential is applied between the reference electrode and the rare earth metal impregnated zeolite modified electrode produce a current. Zeolite modified solgel electrode as an electrochemical sensor for potentiometric determination of cesium ions in water samples. N2 the electrocatalytic production of hydroxyl radical ho on the surface of zeolite modified electrode me employing cu zeolites zsm5 and. New zeolite modified carbonbased electrodes are described. The kjeldahl ammonia distillation technique and the ammonia electrode technique for measuring nh 3 give identical cec results. Voltammetric detection of urea on an agmodified zeolite.
Pdf 4 implication of zeolite chemistry in electrochemical science. Again, as the medium of electrocatalysis using zeolite modified electrode zme is either acidic or alkaline so the impact of acid and alkali on zeolite porosity and acidity is vital. Drinking and grey water treatment several conventional methods are used for the removal of pollutants from drinking water, such as coagulation followed by filtration, membrane processes and ion exchange. Comparison of zeolitemodified electrodes with a graphite electrode.
In the present study, an expanded graphiteag modified zeolite epoxy composite egagzepoxy electrode was prepared from romanian natural zeolitic volcanic tuff modified with silver, and electrochemically characterized for urea detection. Although paracetamol is known to have excellent safety profile at recommended therapeutic doses, health effects are also reported at acute overdoses. Pdf preconcentration and electroanalysis of copper at. Fuel cell applications of chemically synthesized zeolite. The electronic conductivity of the sample was enhanced by adding 10 wt. This paper is solely concerned with the mechanism of electron transfer in zeolite modified electrodes zmes where the zeolite has been modified with electroactive transition metal ions or complexes. The screenprinted zeolite modified electrode spzme resulted in faster accumulation and release of the electroactive probe compared to the zeolite modified carbon paste electrode zmcpe. Heavy metal ions removal from water using modified zeolite. Dzyadevych2,3 and burcu akata kurc1,4 abstract the combination of advantages of using zeolites and gold nanoparticles were aimed to be used for the. Pdf screenprinted zeolitemodified carbon electrodes. The zeolitemodified carbon paste electrode was immerse d in the cell containing the stirred copper solution and the effe ct of ac cumulation time w as studied. Us6843900b2 potentiometric nox sensors based on yttria.
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