Scanning electron microscopy indicated that the formed silver material had a welldefined dendritic structure and xrd confirmed that the silver was in a cubic phase. However, this method was timeconsuming about 1 week and hazardous because of the. Controllable electrochemical synthesis of reduced graphene. Amperometric glucose biosensors based on functionalized electrochemically reduced graphene oxide matei raicopol1, ioana vlasceanu2, iulian lupulescu3, ana maria brezoiu4, luisa pilan5 in the present work we report a new strategy to create glucose amperometric biosensors with improved analytical characteristics using graphene as support for.
Electrochemically reduced graphene oxide pencilgraphite. Request pdf synthesis of pt nanoparticles on electrochemically reduced graphene oxide by potentiostatic and alternate current methods reduced graphene oxide rgo has been synthesized on pt. The oxygen content is significantly decreased and the sp2 carbon is restored after electrochemical reduction. Synthesis of electrochemicallyreduced graphene oxide film with.
Dec 01, 20 graphene has superior electrical conductivity than graphite and other allotropes of carbon because of its high surface area and chemical tolerance. The authors describe an electrochemical dopamine sensor that is based on the use of electrochemically coreduced graphene oxide ergo and gold nanoparticles aunps on an indiumtin oxide ito electrode. Jun 17, 2019 graphene oxide multilayers obtained from bamboo. Synthesis and characterization of electrochemicallyreduced. Influence of protons on reduction degree and defect formation in. The surface functionalization of go was carried out with aryl diazonium salt including 4iodoaniline to form phenyl functionalized go iphgo. To the best of our knowledge, the simultaneous voltammetric determination of aa, pa, and. The electrochemical reduction of go was investigated in aqueous, at both acid. In the present paper, graphene oxide was directly electrodeposited by means of cyclic voltammetric techniques on the glassycarbon electrode gce to obtain a reduced grapheneoxidemodified electrode ergogce. This method was improved by staudenmaier in 1898 and in 1937 by hofmann who used concentrated h 2 so 4, hno 3, and kclo 3 to produce highly oxidized graphite. Here, the rational design and synthesis of bimetallic coni. Using controllable electrochemically reduced graphene oxide. The following is the supplementary data to this article. Facile synthesis of mxeneelectrochemically reduced.
Electrochemical technique offers control over reaction parameters such as the applied voltage, electrical current and reduction time. However, go films must be coated on the cathode electrode in advance when usingthis technique. The go layer was applied on an aluminum substrate and then electrochemically reduced by cyclic voltammetry in 0. Pmdb was first electrodeposited onto the surface of a glassy carbon electrode by electrochemical polymerization of mdihydroxybenzene in the presence of graphene oxide. Facile synthesis of soluble graphene via a green reduction.
Simultaneous determination of uric acid and xanthine using a. Here we report on an experimental study of an electrocatalyst for the hydrogen evolution reaction her based on cobalt porphyrin and electrochemically reduced graphene oxide ergo functional multilayer films, which are prepared by the alternating layerbylayer lbl assembly of negatively charged graphene oxide go and positively charged tetrakis nmethylpyridyl. Synthesis of electrochemically reduced graphene oxide film with controllable size and thickness and its use in supercapacitor peng, xuyuan, liu, xiaoxia, diamond, dermot orcid. The faster and more efficient reduction of go can be achieved after proper addition of cnts into go during the reduction process. Electrochemically reduced graphene oxide nafionau nanoparticle modified electrode for hydrogen peroxide sensing yajie lv, fang wang, hui zhu, xiaorong zou, chengan tao, and jianfang wang nanomaterials and nanotechnology 2016 10. Graphene production via electrochemical reduction of. Graphene production via electrochemical reduction of graphene. Synthesis and functionalization of graphene and application. The electrochemical partial reduc new advances in carbon nanomaterials. Highly conductive reduced graphene oxide go polymer nanocomposites are synthesized by a wellorganized in situ thermochemical synthesis technique. Polymethylene blue and electrochemically reduced graphene oxide composite film modified electrode pmbergogce was successfully fabricated by electropolymerization and was used for simultaneous determination of uric acid ua and xanthine xa. Here we report a facile ecofriendly onestep electrochemical approach for the fabrication of a polypyrrole ppy, reduced graphene oxide rgo, and gold nanoparticles nanoau biocomposite on a glassy carbon electrode gce. Synthesis of electrochemicallyreduced graphene oxide film.
A simple and efficient electrochemical reductive method for. Pulsepotential coelectrodeposition of reduced graphene oxidezinc rgozn nanocomposite coating is directly controlled upon a steel substrate from a onepot aqueous mixture containing go. Change of the intensity ratio of two bands could be due to the increasing defects in reduced graphene oxide 14, 28 and shows that more new graphitic domains have been created and the number of sp 2 areas has increased. Supercapacitor electrodes based on graphene materials by steven m. An electrochemical synthesis of reduced graphene oxidezinc. Initially, the graphene oxidemultiwalled carbon nanotubeslcysteine gomwntslcys nanocomposite.
This work reports on synthesis of zinc oxide reduced graphene oxide znorgo nanocomposites in the presence of diethylenetriamine deta via a facile microwave method. The electrochemically reduced graphene oxide ergo was characterized by uvvis, eis and zetapotential measurements. Cyclic voltammetry cv and differential pulse anodic stripping voltammetry dpasv had been utilized to study the electrochemical behavior of ergogce toward ascorbic acid aa. This nanotubenanosheet composite was deposited on electrode as active material for. The morphologic and structure of the nanocomposites were characterized using atomic force microscopy, xray diffraction, raman spectroscopy, xray. Onestep electrochemical fabrication of reduced graphene oxide. Fabrication of electrochemically reduced graphene oxide films on glassy carbon electrode by. We report a simple, facile, and reproducible method for the fabrication of electrochemically reduced graphene oxide ergo films on glassy carbon electrode gce by the selfassembly method. In addition, by coupling this method with a spraycoating technique, the controllable synthesis of largearea and patterned ergno films with thicknesses ranging from a single monolayer to several microns may be achieved on. Synthesis and characterization of electrochemicallyreduced graphene article pdf available in bulletin of materials science 367. Reduced graphene oxidecarbon nanotube composites as. Mar 19, 20 we report on a new counter electrode for dyesensitized solar cells dscs, which is prepared using layerbylayer assembly of negatively charged graphene oxide and positively charged poly.
The electrochemical behaviors of ppyrgonanoau and its application to electrochemical detection of hydrogen peroxide were investigated by cyclic voltammetry. Facile synthesis of mxene electrochemically reduced. Pdf electrochemical reduction of graphene oxide films. Electrochemically reduced graphene oxide ergo film was characterized by xray. The same electrode is first used as the anode for the electrophoretic. The resultant ergo electrode showed enhanced capacitance and an orr onset potential of. Facile synthesis of soluble graphene via a green reduction of graphene oxide in tea solution and its biocomposites. The surface morphology, structure, and crystallinity of the coated materials were characterized using scanning electron microscope sem, xray diffraction xrd, fourier. Erg is characterized with scanning electron microscopy, transmission electron microscopy, xray photoelectron spectroscopy, and xray diffraction. Electrochemically reduced graphene oxide pencilgraphite in. Electrochemical reduction is seen as a promising alternative due to its fast and green synthesis approach 2629. Synthesis of electrochemicallyreduced graphene oxide. Agagcl, similar to that of a nitrogen doped reduced graphene oxide nrgo. This study aimed to determine the optimum applied potential for the.
Herein, we report a facile method to fabricate co porphyrin functionalized electrochemically reduced graphene oxide cotmpypergo thin film by direct assembly of oppositely charged tetrakisnmethylpyridyl porphyrinato cobalt cotmpyp and go nanosheets under mild conditions followed by an electrochemical reduction procedure. This method could restore some of the original properties of pristine graphene and exploit new functionalities of rgo, along with other nanoparticles or compounds. In this paper, an electrochemical approach was described for preparing graphene with different microstructures, starting from aqueous solutions of graphene oxide go, processed under direct voltage. Amperometric biosensor based on electrochemically reduced.
An electrochemical synthesis of reduced graphene oxide. The process relied on the electrochemical reduction of go sheets deposited on the surface of cu electrode. We demonstrate an electrochemical reduction method to reduce graphene oxide go to electrochemically reduced graphene oxide ergo with the assistance of carbon nanotubes cnts. In situ synthesis of thermochemically reduced graphene. Nov 06, 2015 synthesis of graphene oxide liquid crystals. Shapecontrollable zno nanostructures based on synchronously electrochemically reduced graphene oxide and their morphologydependent electrochemical performance. Request pdf synthesis of pt nanoparticles on electrochemically reduced graphene oxide by potentiostatic and alternate current methods reduced graphene oxide rgo has.
Electrochemically reduced graphene oxide multilayer films as. Pdf graphene oxide go film was electrochemically reduced by a cyclic. Electrochemical reduction was used to prepare rgo because of its cost effectiveness, environmental friendliness, and ability to produce rgo thin films in industrial scale. Synchronous electrosynthesis of polyxanthurenic acid. Electrochemically processed graphene sheets were obtained through the reduction of graphene oxide from hydrazine hydrate. Carbon nanotube and graphene oxide directed electrochemical synthesis of silver dendrites li fu, a guosong lai, b peter j. The synergistic effects of ergo and eraunps promote electron transport in the modified ito. Synthesis of pt nanoparticles on electrochemically reduced. Graphene oxide go was reduced by a rapid, effective and ecofriendly electrochemical method of repetitive cathodic cyclic potential cycling, without using any reducing reagents. Here, we introduce the preparation of the hybrid nanocompositemodified electrode consisting of reduced graphene oxide rgo and. Fabrication of electrochemically reduced graphene oxide films on. The morphology and structure of the gmhs were systematically. Pdf synthesis and characterization of electrochemically. Electrochemically reduced graphene oxide ergo film was characterized by x ray.
Jun 15, 2018 we demonstrate an electrochemical reduction method to reduce graphene oxide go to electrochemically reduced graphene oxide ergo with the assistance of carbon nanotubes cnts. Using controllable electrochemically reduced graphene. Electrochemically reduced graphene oxidenafionau nanoparticle modified electrode for hydrogen peroxide sensing yajie lv, fang wang, hui zhu, xiaorong zou, chengan tao, and jianfang wang nanomaterials and nanotechnology 2016 10. The graphene precursor, graphene oxide go, was selfassembled on gce through a diamine linker which was preassembled on gce by electrostatic interaction between the positively charged amine and the. Synthesis of electrochemicallyreduced graphene oxide film with controllable size and thickness and its use in supercapacitor author links open overlay panel xuyuan peng a b xiaoxia liu b dermot diamond a king tong lau a. The oxidized form of graphene, graphene oxide go, has received a lot of. Recently a direct electrochemical reduction method of preparing reducedgraphene. Biosensors free fulltext influence of graphene oxide. Electrochemical synthesis of polypyrrole, reduced graphene. The highresolution transmission electron microscopy hrtem images revealed that the zno nanorods, with an.
Go was prepared using the modified hummers method 36. A new pretreatment protocol for spces, involving two successive steps in order to achieve a reproducible deposition of go, is also proposed. Journal of the electrochemical society 2018, 165 16, b804b8. Synthesis, characterization, and preparation of nickel nanoparticles decorated electrochemically reduced graphene oxide modified electrode for electrochemical sensing of diclofenac. Recently, graphene oxide and graphene buckypaper have been used as fillers for preparing composites. This work described the preparation, characterization, and electrochemical behavior toward heavy metal ions of the aloohreduced graphene oxide nanocomposites. Synthesis of titanium dioxide tio2reduced graphene. We report a simple onestep electrodeposition method for the synthesis of silver dendritic structures with the aid of graphene oxide go modified multiwalled carbon nanotubes mwcnts which are dispersed in an agno 3 solution.
The new electrochemical cell for the scaleup synthesis as. The same electrode is first used as the anode for the electrophoretic deposition of go. To further improve its sensing performance, herein, the composite of ti 3 c 2 t x mxene and electrochemically reduced graphene oxide mxeneergo was proposed as electrode material for electrochemical detection of pesticide carbendazim cbz. Facile synthesis of mxeneelectrochemically reduced graphene oxide composites and their application for electrochemical sensing of carbendazim to cite this article. Simultaneous voltammetric determination of ascorbic acid.
Typically, the electrochemical reduction of go can be carried out using a standard electrochemical cell in the presence of a nonhazardous aqueous buffer solution at room temperature. The most challenging issue in the development of metalair batteries is the insufficient catalytic activity of the cathode toward oxygen evolution and reduction reactions oerorr. Go plays important roles in the sustainable development of energy and the environment, taking advantages of oxygencontaining functional groups for good dispersibility and assembly. This nanotubenanosheet composite was deposited on electrode as active. Compared with hummers method, electrochemical exfoliation of graphite is considered facile and. Enhancing the corrosion resistance of aluminum by graphene. The xray diffraction xrd patterns of the nanocomposites correspond to the zno hexagonal phase wurtzite structure. P m db was first electrodeposited onto the surface of a glassy carbon electrode by electrochemical polymerization of m dihydroxybenzene in the. An eightvolume set of handbooks on graphene research and applications. A novel amperometric biosensor was designed via immobilization of glucose oxidase god into the composite films of electrochemically reduced graphene oxide rgo and polymdihydroxybenzene pmdb.
The electrochemical reduction of graphene oxide go is an environmentally friendly and energysaving method for improving the characteristics of go. Synthesis of graphene materials by electrochemical. Thus, the formed electrochemically reduced go ergo films can be used only as sensing or conductive materials in devices because mass production of. Pdf facile and controllable electrochemical reduction of. Electrochemical impedance spectroscopy eis verified the enhanced electron transfer ability of the electrochemically reduced graphene oxide ergo compared to go.
Graphene oxide is electrochemically reduced which is called electrochemically reduced graphene oxide erg. Graphene oxide go was electrochemically reduced to graphene gn, accompanied by the simultaneous formation of mno2 with a nanowall morphology via cathodic electrochemical deposition. Recently a direct electrochemical reduction method of preparing reduced graphene. Go nanosheets are synthesized by modified hummers approach while zn cations are produced in the solution and deposited on go nanosheets using anodic dissolution technique. This set features volumes 1, 2, 3, 4, 5, 6, 7, and 8 of the handbook of graphene. Request pdf synthesis of titanium dioxide tio2reduced graphene oxide rgo thin film composite by spray pyrolysis technique and its physical properties tio2reduced graphene oxide rgo. Onestep electrochemical approach to the synthesis of. We have investigated the influence exerted by the concentration of graphene oxide go dispersion as a modifier for screen printed carbon electrodes spces on the fabrication of an electrochemical biosensor to detect dna hybridization.
This paper introduces engineering of graphene, as well as a related material called reduced graphene oxide, as materials for use in supercapacitors. Initially, the graphene oxidemultiwalled carbon nanotubeslcysteine gomwntslcys. Mahon, a james wang, c deming zhu, d baohua jia, e francois malherbe a and aimin yu ab. Graphene oxide nanosheets were synthesized from carbon platelet nanofibers to obtain highly hydrophilic layers of less than 250 nm in width. Bimetallic metalorganicframeworkreduced graphene oxide. New synthesis method, basic properties, and future electronic applications pages. The graphene oxide and electrochemically reduced graphene oxide pt ergoxpt hybrid materials were characterized through different spectroscopy and microscopy techniques. Facile synthesis of mxene electrochemically reduced graphene oxide composites and their application for electrochemical sensing of carbendazim to cite this article. Synthesis of electrochemicallyreduced graphene oxide lm. Comparative response of biosensing platforms based. Oxygen reduction reaction by electrochemically reduced. Preparation, characterization and their electrochemical proper ties. An electrochemical synthesis method of reducing graphene oxide go under constant potential is reported.
Photosynergetic electrochemical synthesis of graphene oxide. Electrochemicallyreduced graphene oxide ergo and gold nanowires aunws are used to modify the surface of a screenprinted carbon electrode spce with the application of an intercalated label, doxorubicin dox. Preparation, characterization and their electrochemical. The present work is on the synthesis and characterization of vertically aligned zno nanostructures sheltered by electrochemically reduced graphene oxide ergo, i. Although its badly electrical conductivity limits the usage of graphene oxide, many efforts have improved the methods to obtain the reduced graphene oxide, such. We have demonstrated a onestep and effective electrochemical method to synthesize graphene mno2 nanowall hybrids gmhs. In other words, the average size of sp 2 areas is reduced during the reduction of graphene oxide. We report on a new counter electrode for dyesensitized solar cells dscs, which is prepared using layerbylayer assembly of negatively charged graphene oxide and positively charged poly. The prepared samples were heated to different temperatures such as 673 and 873 k. The thermochemically developed reduced go riphgo has five times higher electrical conductivity. A controllable electrochemical synthesis to convert reduced graphene oxide rgo from graphite flakes was introduced and investigated in detail. This new material was synthesized through a green onepot hydrothermal method.
Microwave synthesis of zinc oxide reduced graphene oxide. Herein, we develop an ultrasensitive electrochemical nanobiosensor to quantify serum mir7 as a validated biomarker of ad. Department of chemistry, karunya university, coimbatore 641 114, india email. Synthesis and characterization of electrochemically. Synthesis of graphenebased nanosheets via chemical reduction of. The mxeneergo was synthesized by a facile and green electrochemical approach, where the mixture of. Various aspects for the graphene oxide reactivity were also discussed. Area and patterned electrochemically reduced graphene oxide films a study was conducted to demonstrate the first simple, efficient, lowcost, and. A facile method for batch preparation of electrochemically reduced. Facile synthesis of mxeneelectrochemically reduced graphene. We have synthesized graphene oxide go following a modified hummers method, which has been subsequently reduced by electrochemical procedures. Graphene oxide go and graphene are promising materials with many interesting properties for applications.
Pdf electrochemical reduction of graphene oxide and its. Graphene oxide, usually obtained by exfoliating graphite, provides a way towards flexible, lowcost, bulk production paperlike materials known as buckypapers. The synthesis conditions for synthesizing pristine graphene, graphene oxide go, and graphene composites are significantly different. The graphene produced from this approach is more appropriately known as electrochemically reduced graphene oxide ergo as its properties differ from that of pristine graphene because of several residual oxygen functionalities on the carbon basal plane, while it retains some of the graphene structures. Here we propose a strategy of radical oxidation reaction for the highefficiency production of graphene oxide go. Here, we introduce the preparation of the hybrid nanocomposite modified electrode consisting of reduced graphene oxide rgo and. Jan 01, 20 in this work, we report the synthesis and characterization of different kinds of graphene nanomaterials and their applicability to the development of biosensing platforms. Nanomaterials free fulltext a facile method for batch. Centre for sensor web technologies, national centre for sensor research, school of chemical sciences, dublin city university.
Interfacing electrochemically reduced graphene oxide with polyerichrome black t for simultaneous determination of epinephrine, uric acid and folic acid. Nov 12, 2016 functionalized nanocomposites based on various type of graphene nanomaterials including graphene, graphene oxides gos, and doped graphene oxides are widely used as materials for various sensors that can display high sensitivity, selectivity and stability. Electrochemically reduced graphene oxide sheets for use in. Simultaneous determination of uric acid and xanthine using. This results in an excellent performance for voltammetric sensing of dopamine da. Synthesis and characterization of electrochemicallyreduced graphene.
Mar 27, 2015 in this paper, an electrochemical approach was described for preparing graphene with different microstructures, starting from aqueous solutions of graphene oxide go, processed under direct voltage. We show that a partially reduced graphene oxide electrocatalyst, synthesized by electrochemical reduction of graphene oxide go, displays significantly enhanced catalytic activity towards the oxygen reduction reaction orr in alkaline solutions compared to the starting go. Graphite oxide was first prepared by brodie using kclo 3 and hno 3 about 150 years ago. Using controllable electrochemically reduced graphene oxide ergo as highcapacitance electrode material for supercapacitors international conference on battery and fuel cell technology december 0809, 2016 dubai, uae.
Selverston graphene is a new type of carbon material with promising potential in energystorage applications such as supercapacitor electrodes. Amperometric glucose biosensors based on functionalized electrochemically reduced graphene oxide matei raicopol1, ioana vlasceanu2. Carbon nanotube and graphene oxide directed electrochemical. The electrochemical reduction of graphene oxide typically involves complicated procedures, such as modification of electrodes and preparation of electrolytes. Graphene has superior electrical conductivity than graphite and other allotropes of carbon because of its high surface area and chemical tolerance. Area and patterned electrochemically reduced graphene oxide films ming zhou state key laboratory of electroanalytical chemistry, institute of applied chemistry, chinese academy of sciences, changchun 022 p. Pdf graphene has attracted great interest for its excellent mechanical, electrical, thermal and optical properties.
The group had used graphite oxide, graphene oxide, thermally reduced graphene oxide, and electrochemically reduced graphene oxide for fabrication of immunosensor. Metalorganic frameworks mofs and mofbased electrocatalysts have drawn considerable attention for the replacement of noblemetal electrocatalysts. Fabrication of electrochemically reduced graphene oxide. Synthesis of electrochemicallyreduced graphene oxide lm with. Electrochemically reduced graphene oxide multilayer films. Early detection of alzheimers disease using a biosensor.
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