Massive production of graphene oxide from expanded graphite. Potts a, aruna velamakanni a, shanthi murali a, rodney s. Preparation by ultrasonic treatment of graphene oxide oh et al. Cement nanocomposites fakhimbabak, 1 hassaniabolfazl, 1 rashidialimorad, 2 andghodousiparviz 3 civil engineering and environment faculty, tarbiat modares university, tehran, iran. Preparation of graphene oxidebased hydrogels as efficient.
Research article preparation and characterization of graphene oxide jianguosong, 1 xinzhiwang, 1 andchangtangchang 2 college of environment and materials engineering, yantai university, qingquan road, laishan district, yantai, china. Graphene oxide go films with twodimensional structure were successfully prepared via the modified hummer method. Graphite oxide, containing abundant oxygenbased groups, not only can be obtained easily from the oxidation of graphite, but can also be readily. In this work, the go nanosheets were prepared by a chemical exfoliation technique. Fast and facile preparation of graphene oxide and reduced. The gopei hydrogels were achieved through both hydrogen bonding and electrostatic interactions. Preparation of graphene from chemical reduction of graphene oxide go is recognized as one of the most promising methods for largescale and lowcost production of graphenebased materials. Design, synthesis, and characterization of graphene. An effective way to prepare graphene oxide carbon fiber hybrid fiber was proposed by the treatment with hydrogen peroxide and concentrated nitric acid combined with electrophoretic deposition process.
In this paper, the facile preparation of gopolyethylenimine pei hydrogels as efficient dye adsorbents has been reported. Graphene oxide is a form of graphene that includes oxygen functional groups, and has interesting properties that can be different than those of graphene. In a deviation from the conventional hummers method, a spontaneous expansion approach was introduced with expanded graphite as the precursors. However, the challenge is to synthesize graphene in a bulk quantity. Preparation and characterization of graphene oxide nanosheets. The preparation of composite material of graphene oxide polystyrene. The present invention is a kind of preparation method of graphene oxide, fully reacts, obtain graphene oxide by after graphite, benzoyl peroxide, peracetic acidhydrogen peroxide mixing through vibratory milling. Comprehensive characterizations of the properties of go films were conducted. Preparation and characterization of lifepo4grapheneoxide composites volume 1266 hongming yu, ruijun pan, xuefei chen, wentao song, jian xie, xinbing zhao.
The structural and optical properties of the asprepared go nanosheets were characterized by raman, ftir, uvvis and photoluminescence spectroscopy. Pdf graphene oxide go can be regarded as one typical twodimension structured oxygenated planar molecular material. Nanoparticle hybrid materials for bioapplications perry t. Here we describe a convenient method for the preparation of graphene oxide which makes use of expandable graphite, resulting in a simpli. We found that the go area is strongly correlated with the c. Preparation and characterization of lifepo4grapheneoxide. The preparation of graphene oxide with wet oxidation methods usually starts from graphite. Graphene oxide go were utilized to improve the interfacial performance of carbon fiber cf and epoxy resin. The membranes are typically obtained by slow evaporation of graphene oxide solution or by the filtration. This graphene material is called reduced graphene oxide, often abbreviated to rgo. The present work deigned to prepare graphene oxide nanoparticles gonps. It is proven that redox method is a promising way to synthesize go films on a large scale. The obtained graphene oxide has been characterized. Preparation of a magnetic reducedgraphene oxidetea waste composite for highefficiency sorption of uranium skip to main content thank you for visiting.
Preparation and characterization of partially reduced. Natural flake graphite nfg was procured from loba chemie india having a mean size of 60 mesh and purity of 98%. Us9938150b2 preparation method of graphene as well as. A fast and facile method for preparation of graphene oxide and reduced graphene oxide nanoplatelets was achieved through reaction of graphite with benzoyl peroxide bpo and followed by in situ reduction of prepared graphene oxide. The preparation of reduced graphene oxide and its photothermal therapy of gliomas in vivo and in vitro haisheng wang1, hongxia chen2, yuehong ma3 1college of basic medical sciences, inner mongolia medical university, jinshan development zone, hohhot, inner. Efficient preparation of largearea graphene oxide sheets.
Preparation of a magnetic reducedgraphene oxidetea waste. The effect of the nonwoven fabric as a substrate on pm 2. Preparation of graphene selected topics in physics. Preparation of graphene from graphene oxide although the report on single sheets of go 14, 15 obtained by procedures estab. Preparation and characterization of graphene oxide reduced. Synthesis and characterization of graphene oxide nanoparticles. Nano express open access preparation of graphene oxidebased hydrogels as efficient dye adsorbents for wastewater treatment haiying guo1,2, tifeng jiao1,2,3, qingrui zhang2, wenfeng guo2, qiuming peng1 and xuehai yan3 abstract graphene oxide go sheets exhibit superior adsorption capacity for removing organic dye pollutants from an aqueous. Research article preparation and mechanical properties of. Here we report the preparation and characterization of graphene oxide paper, a freestanding carbonbased membrane material made by flowdirected. Graphene oxide go has been initially prepared by a modified hummersmethod. Synthesis of graphene oxide scientific research publishing.
Graphene oxide go sheets exhibit superior adsorption capacity for removing organic dye pollutants from an aqueous environment. Pdf graphene oxide go films with twodimensional structure were successfully prepared via the modified hummer method. Antimicrobial activity of prepared nps is investigated against bacillus subtilis. Highyield preparation of graphene oxide from small.
Graphene oxide paper or graphite oxide paper is a material fabricated from graphite oxide. This protocol outlines two main methods for preparation of endotoxinfree a graphene oxide, and b graphene dispersions for biological and medical applications. Iseec2011 preparation and characterization of graphene oxide nanosheets t. An improved method for the preparation of graphene oxide go is described. The preparation of graphene oxide and its derivatives and. Grapheneoxide g was prepared by the hummers method. A gcooh layer was synthesised using chloroacetic acid and g. By reducing graphene oxide, these oxidized functional groups are removed, to obtain a graphene material. The synthesis, properties, and applications of graphene and graphene oxide. We investigate the performance of graphene oxide go in improving mechanical properties of cement composites.
A polycarboxylate superplasticizer was used to improve the dispersion of go flakes in the cement. As a novel twodimensional carbon material, graphene has fine potential applications in the fields of electron transfer agent and supercapacitor material for its excellent electronic and optical property. The preparation of graphene oxide and its derivatives and their. Although graphite oxide is a multilayer system, monolayer flakes and fewlayer flakes can be found in a graphene oxide dispersion.
The maximally oxidized bulk product is a yellow solid with c. Preparation and characterization of graphene oxide paper. As shown in scheme 1, the preparation of a glycinemediated gogc 3 n 4 composite membrane glygogc 3 n 4 was mainly divided into three steps. Preparation of glycine mediated graphene oxide gc3n4. The preparation of composite material of graphene oxide. Therefore, they suspended twentyfive milligrams of graphene oxide powder in 200 ml of deionized water. Facile preparation of abstacking graphene oxide znallayered double hydroxide composites and enhanced visiblelight photocatalytic performance of the calcined product. Massive production of graphene oxide from expanded graphite ling sun, bunshi fugetsu1 graduate school of environmental science, hokkaido university, sapporo 0600810, japan abstract. Modification of graphene oxide and preparation of ruo2. Graphite oxide, formerly called graphitic oxide or graphitic acid, is a compound of carbon, oxygen, and hydrogen in variable ratios, obtained by treating graphite with strong oxidizers. Reduced graphene oxide rgo was thereafter extracted by thermal. Endotoxinfree preparation of graphene oxide and graphene. The maximum area of the go sheets obtained can reach. Pdf structure and synthesis of graphene oxide researchgate.
Massive production of graphene oxide from expanded graphite arxiv. The mechanism is mainly the generation of oxygencontaining groups on graphene sheets. In the following some of these methods will be presented and discussed. A simple approach to stepwise synthesis of graphene oxide. Here we introduce a modified chemical exfoliation technique to prepare largearea graphene oxide go sheets. The preparation method of graphene oxide of the present invention, easy, cheap, quick, efficient, and there is the advantage of security, economy, the feature of. This work presents the preparation and characterization of pristine and transition metal doped partially reduced graphene oxide aerogels. The redox method is considered to be a very promising way to prepare graphene, and graphite oxide go, as intermediate product of prepara. Study of reduced graphene oxide preparation by hummers. Pdf preparation and mechanical properties of graphene. Tem and dfm analyses showed that go sheets prepared in this study had single.
Preparation of graphene oxide coatings onto carbon fibers. Largearea sheets are highly desirable for fundamental research and technological applications of graphene. Currently, hummers method kmno 4, nano 3, h 2 so 4 is the most common method used for preparing graphene oxide. Basic protocol 1 and alternate protocol describe two different modified hummers methods for highyield synthesis and exfoliation of graphene oxide go from bulk graphite. All materials were characterised using xray diffraction. This study reports a new, green, and efficient reducing agent. In this study, graphene oxide was prepared by the modified hummers method, and the graphene oxide slurry was deposited onto nonwoven substrates by coating technology to prepare a graphene oxide membrane. Due to the presence of oxygen functionalities, graphene oxide can easily disperse in organic solvents, water, and different matrixes. Research article preparation and characterization of.
Hydrazinereduction of graphite and graphene oxide sungjin park a,b, jinho an a, jeffrey r. By stirring they obtained an inhomogeneous brown suspension. Pdf preparation and characterization of graphene oxide. Here we report the preparation and characterization of graphene oxide paper, a freestanding carbonbased membrane material made by flowdirected assembly of individual graphene oxide sheets.
Graphene oxide go has recently attracted great attention due to its unique chemical and physical properties. Green preparation of reduced graphene oxide for sensing. Subsequently reduced graphene oxide rgo having few layer graphene is extracted from go by the thermal reduction of go. We have found that excluding the nano 3, increasing the amount of kmno 4, and performing the reaction in a 9. Pdf preparation and characterization of graphene oxide paper. Convenient preparation of graphene oxide from expandable. The stepbystep preparation of aerogels from graphene oxide with an assistance of vcl 3, crcl 3, fecl 2 4h 2o, cocl 2, nicl 2 and cucl 2 chlorides as reducing agents is shown and explained. The invention also relates to a preparation method of graphene using graphene oxide obtained by method mentioned before.
The intensity r atio between d peak and g peak in the raman spectra of graphene oxide and reduction of graphene oxide indicated that the. Graphite oxide was first prepared by using hummers method5 with natural flake graphite, with which graphene oxide was synthesised. Original article the preparation of reduced graphene oxide. Cn103288078b the preparation method of graphene oxide. Research article preparation and mechanical properties of graphene oxide. Materials chemistry department, institute of inorganic chemistry as cr v. Synthesis of graphene oxide using modified hummers method. Journal of physics and chemistry of solids 2020, 6, 109199. Ruoff a, a department of mechanical engineering and the texas materials institute, the university of texas at austin, one university station c2200, austin, tx 787120292, usa b department of chemistry, inha university. Synthesis of graphene oxide go by modified hummers.
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