The mxeneergo was synthesized by a facile and green electrochemical approach, where the mixture of. A simple and efficient electrochemical reductive method for. Selverston graphene is a new type of carbon material with promising potential in energystorage applications such as supercapacitor electrodes. Pdf synthesis and characterization of electrochemically. Graphene oxide, usually obtained by exfoliating graphite, provides a way towards flexible, lowcost, bulk production paperlike materials known as buckypapers.
The surface functionalization of go was carried out with aryl diazonium salt including 4iodoaniline to form phenyl functionalized go iphgo. 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. Preparation, characterization and their electrochemical proper ties. The synergistic effects of ergo and eraunps promote electron transport in the modified ito. Graphene oxide nanosheets were synthesized from carbon platelet nanofibers to obtain highly hydrophilic layers of less than 250 nm in width. Synthesis of titanium dioxide tio2reduced graphene. Facile synthesis of soluble graphene via a green reduction of graphene oxide in tea solution and its biocomposites. A facile method for batch preparation of electrochemically reduced. Microwave synthesis of zinc oxide reduced graphene oxide. Simultaneous determination of uric acid and xanthine using. Area and patterned electrochemically reduced graphene oxide films a study was conducted to demonstrate the first simple, efficient, lowcost, and. Although its badly electrical conductivity limits the usage of graphene oxide, many efforts have improved the methods to obtain the reduced graphene oxide, such.
Graphene production via electrochemical reduction of. 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. Synthesis of electrochemicallyreduced graphene oxide. Recently a direct electrochemical reduction method of preparing reducedgraphene. Pdf facile and controllable electrochemical reduction of. We have synthesized graphene oxide go following a modified hummers method, which has been subsequently reduced by electrochemical procedures. A controllable electrochemical synthesis to convert reduced graphene oxide rgo from graphite flakes was introduced and investigated in detail. Shapecontrollable zno nanostructures based on synchronously electrochemically reduced graphene oxide and their morphologydependent electrochemical performance.
Centre for sensor web technologies, national centre for sensor research, school of chemical sciences, dublin city university. 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. 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. Request pdf synthesis of pt nanoparticles on electrochemically reduced graphene oxide by potentiostatic and alternate current methods reduced graphene oxide rgo has. To the best of our knowledge, the simultaneous voltammetric determination of aa, pa, and.
Thus, the formed electrochemically reduced go ergo films can be used only as sensing or conductive materials in devices because mass production of. 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 morphology and structure of the gmhs were systematically. The xray diffraction xrd patterns of the nanocomposites correspond to the zno hexagonal phase wurtzite structure. This nanotubenanosheet composite was deposited on electrode as active. 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.
Mahon, a james wang, c deming zhu, d baohua jia, e francois malherbe a and aimin yu ab. The electrochemical behaviors of ppyrgonanoau and its application to electrochemical detection of hydrogen peroxide were investigated by cyclic voltammetry. The group had used graphite oxide, graphene oxide, thermally reduced graphene oxide, and electrochemically reduced graphene oxide for fabrication of immunosensor. Agagcl, similar to that of a nitrogen doped reduced graphene oxide nrgo. The present work is on the synthesis and characterization of vertically aligned zno nanostructures sheltered by electrochemically reduced graphene oxide ergo, i.
Journal of the electrochemical society 2018, 165 16, b804b8. 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. This reduction strategy precludes the employment of toxic solvents, leading. Influence of protons on reduction degree and defect formation in. Graphene production via electrochemical reduction of graphene. Facile synthesis of soluble graphene via a green reduction. This results in an excellent performance for voltammetric sensing of dopamine da. Enhancing the corrosion resistance of aluminum by graphene. Photosynergetic electrochemical synthesis of graphene oxide. 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.
The electrochemical reduction of graphene oxide go is an environmentally friendly and energysaving method for improving the characteristics of go. Using controllable electrochemically reduced graphene oxide. Oxygen reduction reaction by electrochemically reduced. The go layer was applied on an aluminum substrate and then electrochemically reduced by cyclic voltammetry in 0. The graphene oxide and electrochemically reduced graphene oxide pt ergoxpt hybrid materials were characterized through different spectroscopy and microscopy techniques. The surface morphology, structure, and crystallinity of the coated materials were characterized using scanning electron microscope sem, xray diffraction xrd, fourier. 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. Synthesis and characterization of electrochemically. A new pretreatment protocol for spces, involving two successive steps in order to achieve a reproducible deposition of go, is also proposed. Electrochemical synthesis of polypyrrole, reduced graphene.
This paper introduces engineering of graphene, as well as a related material called reduced graphene oxide, as materials for use in supercapacitors. The same electrode is first used as the anode for the electrophoretic. Early detection of alzheimers disease using a biosensor. Controllable electrochemical synthesis of reduced graphene. An electrochemical synthesis method of reducing graphene oxide go under constant potential is reported. Synthesis of pt nanoparticles on electrochemically reduced.
Graphene oxide is electrochemically reduced which is called electrochemically reduced graphene oxide erg. 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. Here we propose a strategy of radical oxidation reaction for the highefficiency production of graphene oxide go. The oxygen content is significantly decreased and the sp2 carbon is restored after electrochemical reduction. Onestep electrochemical approach to the synthesis of. 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. Initially, the graphene oxidemultiwalled carbon nanotubeslcysteine gomwntslcys nanocomposite. Synthesis, characterization, and preparation of nickel nanoparticles decorated electrochemically reduced graphene oxide modified electrode for electrochemical sensing of diclofenac.
Pdf electrochemical reduction of graphene oxide and its. The morphologic and structure of the nanocomposites were characterized using atomic force microscopy, xray diffraction, raman spectroscopy, xray. Synthesis of graphenebased nanosheets via chemical reduction of. Jun 17, 2019 graphene oxide multilayers obtained from bamboo. Carbon nanotube and graphene oxide directed electrochemical. 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 resultant ergo electrode showed enhanced capacitance and an orr onset potential of. Synchronous electrosynthesis of polyxanthurenic acid.
Interfacing electrochemically reduced graphene oxide with polyerichrome black t for simultaneous determination of epinephrine, uric acid and folic acid. 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 electrochemically reduced graphene oxide film with controllable size and thickness and its use in supercapacitor peng, xuyuan, liu, xiaoxia, diamond, dermot orcid. In other words, the average size of sp 2 areas is reduced during the reduction of graphene oxide. P m db was first electrodeposited onto the surface of a glassy carbon electrode by electrochemical polymerization of m dihydroxybenzene in the. Cyclic voltammetry cv and differential pulse anodic stripping voltammetry dpasv had been utilized to study the electrochemical behavior of ergogce toward ascorbic acid aa. In situ synthesis of thermochemically reduced graphene.
Amperometric glucose biosensors based on functionalized electrochemically reduced graphene oxide matei raicopol1, ioana vlasceanu2. An electrochemical synthesis of reduced graphene oxidezinc. However, go films must be coated on the cathode electrode in advance when usingthis technique. 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. Fabrication of electrochemically reduced graphene oxide films on glassy carbon electrode by. Biosensors free fulltext influence of graphene oxide. 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. 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. Using controllable electrochemically reduced graphene. Graphite oxide was first prepared by brodie using kclo 3 and hno 3 about 150 years ago. 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.
The electrochemical reduction of graphene oxide typically involves complicated procedures, such as modification of electrodes and preparation of electrolytes. Synthesis and characterization of electrochemicallyreduced graphene article pdf available in bulletin of materials science 367. 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. Facile synthesis of mxeneelectrochemically reduced graphene oxide composites and their application for electrochemical sensing of carbendazim to cite this article. 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. Facile synthesis of mxene electrochemically reduced graphene oxide composites and their application for electrochemical sensing of carbendazim to cite this article. The oxidized form of graphene, graphene oxide go, has received a lot of. Highly conductive reduced graphene oxide go polymer nanocomposites are synthesized by a wellorganized in situ thermochemical synthesis technique. The same electrode is first used as the anode for the electrophoretic deposition of go. The prepared samples were heated to different temperatures such as 673 and 873 k. Electrochemically reduced graphene oxide ergo film was characterized by xray. We have demonstrated a onestep and effective electrochemical method to synthesize graphene mno2 nanowall hybrids gmhs. This work described the preparation, characterization, and electrochemical behavior toward heavy metal ions of the aloohreduced graphene oxide nanocomposites.
This new material was synthesized through a green onepot hydrothermal method. The highresolution transmission electron microscopy hrtem images revealed that the zno nanorods, with an. Reduced graphene oxidecarbon nanotube composites as. Amperometric biosensor based on electrochemically reduced. Various aspects for the graphene oxide reactivity were also discussed. 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. Onestep electrochemical fabrication of reduced graphene oxide. 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. 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.
Simultaneous determination of uric acid and xanthine using a. Electrochemically processed graphene sheets were obtained through the reduction of graphene oxide from hydrazine hydrate. However, this method was timeconsuming about 1 week and hazardous because of the. This nanotubenanosheet composite was deposited on electrode as active material for. 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.
Synthesis of electrochemicallyreduced graphene oxide lm with. 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 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. Supercapacitor electrodes based on graphene materials by steven m. Graphene has superior electrical conductivity than graphite and other allotropes of carbon because of its high surface area and chemical tolerance. 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. Pdf electrochemical reduction of graphene oxide films. Facile synthesis of mxene electrochemically reduced.
Electrochemical technique offers control over reaction parameters such as the applied voltage, electrical current and reduction time. Nov 06, 2015 synthesis of graphene oxide liquid crystals. The electrochemical partial reduc new advances in carbon nanomaterials. Herein, we develop an ultrasensitive electrochemical nanobiosensor to quantify serum mir7 as a validated biomarker of ad. Fabrication of electrochemically reduced graphene oxide films on. Electrochemically reduced graphene oxide multilayer films. We demonstrate an electrochemical reduction method to reduce graphene oxide go to electrochemically reduced graphene oxide ergo with the assistance of carbon nanotubes cnts. Pulsepotential coelectrodeposition of reduced graphene oxidezinc rgozn nanocomposite coating is directly controlled upon a steel substrate from a onepot aqueous mixture containing go. Graphene oxide go was electrochemically reduced to graphene gn, accompanied by the simultaneous formation of mno2 with a nanowall morphology via cathodic electrochemical deposition. An eightvolume set of handbooks on graphene research and applications. This method could restore some of the original properties of pristine graphene and exploit new functionalities of rgo, along with other nanoparticles or compounds. 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. Recently a direct electrochemical reduction method of preparing reduced graphene. Synthesis and characterization of electrochemicallyreduced graphene.
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. Here, we introduce the preparation of the hybrid nanocompositemodified electrode consisting of reduced graphene oxide rgo and. 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. Metalorganic frameworks mofs and mofbased electrocatalysts have drawn considerable attention for the replacement of noblemetal electrocatalysts. Synthesis and characterization of electrochemicallyreduced. Nanomaterials free fulltext a facile method for batch. Carbon nanotube and graphene oxide directed electrochemical synthesis of silver dendrites li fu, a guosong lai, b peter j. Pdf graphene oxide go film was electrochemically reduced by a cyclic. Go was prepared using the modified hummers method 36. Erg is characterized with scanning electron microscopy, transmission electron microscopy, xray photoelectron spectroscopy, and xray diffraction. The process relied on the electrochemical reduction of go sheets deposited on the surface of cu electrode. Go plays important roles in the sustainable development of energy and the environment, taking advantages of oxygencontaining functional groups for good dispersibility and assembly. 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.
Dec 01, 20 graphene has superior electrical conductivity than graphite and other allotropes of carbon because of its high surface area and chemical tolerance. Recently, graphene oxide and graphene buckypaper have been used as fillers for preparing composites. 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. The electrochemically reduced graphene oxide ergo was characterized by uvvis, eis and zetapotential measurements. 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 sheets for use in. Here, the rational design and synthesis of bimetallic coni. Facile synthesis of mxeneelectrochemically reduced graphene. Synthesis of graphene materials by electrochemical. Synthesis of electrochemicallyreduced graphene oxide film with. It was found that thermally reduced graphene oxide has provided the best performance with the linear detection range from 0. New synthesis method, basic properties, and future electronic applications pages. Initially, the graphene oxidemultiwalled carbon nanotubeslcysteine gomwntslcys. The new electrochemical cell for the scaleup synthesis as. 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. Facile synthesis of mxeneelectrochemically reduced.
The electrochemical reduction of go was investigated in aqueous, at both acid. Simultaneous voltammetric determination of ascorbic acid. Comparative response of biosensing platforms based. An electrochemical synthesis of reduced graphene oxide. The faster and more efficient reduction of go can be achieved after proper addition of cnts into go during the reduction process. Pdf graphene has attracted great interest for its excellent mechanical, electrical, thermal and optical properties. Electrochemical reduction was used to prepare rgo because of its cost effectiveness, environmental friendliness, and ability to produce rgo thin films in industrial scale. 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. Graphene oxide go and graphene are promising materials with many interesting properties for applications. Graphene oxide go was reduced by a rapid, effective and ecofriendly electrochemical method of repetitive cathodic cyclic potential cycling, without using any reducing reagents. Electrochemically reduced graphene oxide multilayer films as. The following is the supplementary data to this article. Synthesis of electrochemicallyreduced graphene oxide lm. Department of chemistry, karunya university, coimbatore 641 114, india email.
Here, we introduce the preparation of the hybrid nanocomposite modified electrode consisting of reduced graphene oxide rgo and. Compared with hummers method, electrochemical exfoliation of graphite is considered facile and. Pmdb was first electrodeposited onto the surface of a glassy carbon electrode by electrochemical polymerization of mdihydroxybenzene in the presence of graphene oxide. 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. Fabrication of electrochemically reduced graphene oxide. This study aimed to determine the optimum applied potential for the. The thermochemically developed reduced go riphgo has five times higher electrical conductivity. 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. Synthesis and functionalization of graphene and application. 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. Electrochemically reduced graphene oxide pencilgraphite. Synthesis of electrochemicallyreduced graphene oxide film. 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. 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.
Preparation, characterization and their electrochemical. Bimetallic metalorganicframeworkreduced graphene oxide. Electrochemically reduced graphene oxide ergo film was characterized by x ray. The synthesis conditions for synthesizing pristine graphene, graphene oxide go, and graphene composites are significantly different. This set features volumes 1, 2, 3, 4, 5, 6, 7, and 8 of the handbook of graphene.
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