Entries |
Document | Title | Date |
20080199387 | Surface Treatment of Carbon Microfibers - A method of oxidizing the surface of carbon microfibers that includes contacting the microfibers with an oxidizing agent that includes sulfuric acid and potassium chlorate under reaction conditions sufficient to oxidize the surface. The invention also features a method of decreasing the length of carbon microfibers that includes contacting the microfibers with an oxidizing agent under reaction conditions sufficient to decrease the length. | 08-21-2008 |
20080206124 | Method of producing nano-scaled graphene and inorganic platelets and their nanocomposites - Disclosed is a method of exfoliating a layered material (e.g., graphite and graphite oxide) to produce nano-scaled platelets having a thickness smaller than 100 nm, typically smaller than 10 nm, and often between 0.34 nm and 1.02 nm. The method comprises: (a) subjecting the layered material in a powder form to a halogen vapor at a first temperature above the melting point or sublimation point of the halogen at a sufficient vapor pressure and for a duration of time sufficient to cause the halogen molecules to penetrate an interlayer space of the layered material, forming a stable halogen-intercalated compound; and (b) heating the halogen-intercalated compound at a second temperature above the boiling point of the halogen, allowing halogen atoms or molecules residing in the interlayer space to exfoliate the layered material to produce the platelets. Alternatively, rather than heating, step (a) is followed by a step of dispersing the halogen-intercalated compound in a liquid medium which is subjected to ultrasonication for exfoliating the halogen-intercalated compound to produce the platelets, which are dispersed in the liquid medium. The halogen can be readily captured and re-used, thereby significantly reducing the impact of halogen to the environment. The method can further include a step of dispersing the platelets in a polymer or monomer solution or suspension as a precursor step to nanocomposite fabrication. | 08-28-2008 |
20080279749 | Method for Further Processing the Residue Obtained During the Production of Fullerene and Carbon Nanostructures - The present invention relates to a process for further processing of the carbon-containing residue derived from fullerene production and from carbon-nanostructures production, characterized in that the residue is functionalized via introduction of chemical substituents, and the functionalization is carried out during or after the production process. The functionalized carbon-containing residue obtainable by the process is also provided, as is its use as a hydroxylating agent, wetting agent, additive in rubber compounds, and for tether-directed remote functionalization. | 11-13-2008 |
20090022649 | Method for producing ultra-thin nano-scaled graphene platelets - A method of producing ultra-thin, separated nano-scaled platelets having an average thickness no greater than 2 nm or comprising, on average, no more than 5 layers per platelet from a layered graphite material. The method comprises: (a) providing a supply of nano-scaled platelets with an average thickness of no more than 10 nm or having, on average, no more than 30 layers per platelet; and (b) intercalating the supply of nano-scaled platelets to produce intercalated nano platelets and exfoliating the intercalated nano platelets at a temperature and a pressure for a sufficient period of time to produce the ultra-thin nano-scaled platelets. The nano-scaled platelets are candidate reinforcement fillers for polymer nanocomposites. Nano-scaled graphene platelets are much lower-cost alternatives to carbon nano-tubes or carbon nano-fibers. | 01-22-2009 |
20100015032 | Carbon-based material and method of producing the same, and composite material and method of producing the same - A method of producing a carbon-based material having an activated surface includes: (a) mixing an elastomer and a carbon material, and dispersing the carbon material by applying a shear force to obtain a composite elastomer; and (b) heat-treating the composite elastomer at a temperature for vaporising an elastomer to vaporize the elastomer in the composite elastomer. | 01-21-2010 |
20100189625 | GRANULATED PRODUCT OF CARBON NANOTUBE, AND METHOD FOR PRODUCTION THEREOF - [Problems] A carbon nanotube has a low apparent bulk density and therefore has serious problems in the workability upon use. Particularly when two or more types of carbon nanotubes are used together, the workability becomes more serious, and it is more difficult to exploit the properties of the carbon nanotubes. | 07-29-2010 |
20100239486 | Method for making carbon composite material - A method for making a carbon composite material, the method including providing a 1,4-benzenedicarboxylate-metal complex in a vessel, putting the vessel carrying the 1,4-benzenedicarboxylate-metal complex into an environment with a protective gas therein, and heating the 1,4-benzenedicarboxylate-metal complex to a temperature in a range from about 500° C. to about 1300° C. | 09-23-2010 |
20100266476 | CONTINUOUS-FEED FURNACE ASSEMBLY AND PROCESSES FOR PREPARING AND CONTINUOUSLY THERMALLY EXFOLIATING GRAPHITE OXIDE - The present invention relates to a continuous-feed furnace assembly and processes for preparing and continuously thermally exfoliating graphite oxide to give a highly exfoliated graphite. | 10-21-2010 |
20110014111 | HIGHLY EFFICIENT PROCESS FOR MANUFACTURE OF EXFOLIATED GRAPHENE - A process for preparing oxidized graphite that provides exfoliated graphene, preferably with high surface area. The process uses considerably less chlorate than previously known systems. | 01-20-2011 |
20110052476 | THERMALLY EXFOLIATED GRAPHITE OXIDE - A modified graphite oxide material contains a thermally exfoliated graphite oxide with a surface area of from about 300 m | 03-03-2011 |
20110274610 | PROCESS FOR MANUFACTURE OF GRAPHITE OXIDE WITH PURGE OF CHLORINE DIOXIDE - The present invention relates to a process for preparing a graphite oxide while purging chlorine dioxide. The invention process employs starting materials comprising a sulfuric acid, a nitric acid, a chlorate salt, and a graphite and further employs an inert purge gas. | 11-10-2011 |
20110280787 | NITRATE SALT-BASED PROCESS FOR MANUFACTURE OF GRAPHITE OXIDE - The present invention relates to a nitrate salt-based process for preparing a graphite oxide. The invention nitrate salt-based process employs starting materials comprising a sulfuric acid, an inorganic nitrate salt, an amount of water, a first amount of chlorate salt, and a graphite. | 11-17-2011 |
20120003143 | OXIDATION TREATMENT METHOD AND OXIDATION TREATMENT APPARATUS - An oxidation treatment method of the present invention includes the step of bringing a solution having an ozone concentration of 120 to 500 mg/L into contact with a substance to be treated made of a combustible substance, thereby subjecting the substance to be treated and the surface thereof to an oxidation treatment. An oxidation treatment apparatus of the present invention includes: a dissolving means that dissolves an oxygen-ozone mixed gas in a fluorine-based solvent to form mixed fluid; an undissolved gas removal means that removes an undissolved gas from the mixed fluid to form a solution; and an oxidation treatment means that brings the solution into contact with a substance to be treated made of a combustible substance, thereby subjecting the substance to be treated and the surface thereof to an oxidation treatment. | 01-05-2012 |
20120063988 | Dissolution Of Graphite, Graphite And Graphene Nanoribbons In Superacid Solutions And Manipulation Thereof - Methods for dissolving carbon materials such as, for example, graphite, graphite oxide, oxidized graphene nanoribbons and reduced graphene nanoribbons in a solvent containing at least one superacid are described herein. Both isotropic and liquid crystalline solutions can be produced, depending on the concentration of the carbon material The superacid solutions can be formed into articles such as, for example, fibers and films, mixed with other materials such as, for example, polymers, or used for functionalization of the carbon material. The superacid results in exfoliation of the carbon material to produce individual particles of the carbon material. In some embodiments, graphite or graphite oxide is dissolved in a solvent containing at least one superacid to form graphene or graphene oxide, which can be subsequently isolated. In some embodiments, liquid crystalline solutions of oxidized graphene nanoribbons in water are also described. | 03-15-2012 |
20120128570 | PROCESS FOR THE PREPARATION OF GRAPHITE OXIDE AND GRAPHENE SHEETS - A process for the preparation of graphite oxide from graphite using a permanganate salt and an aqueous sulfuric acid solution. The graphite oxide may be further reacted to form graphene sheets. | 05-24-2012 |
20120171103 | METHOD FOR MODIFYING ELECTRICAL PROPERTIES OF CARBON NANOTUBES - The invention relates to a method of modifying electrical properties of carbon nanotubes by subjecting a composition of carbon nanotubes to one or more radical initiator(s). The invention also relates to an electronic component such as field-effect transistor comprising a carbon nanotube obtained using the method of the invention. The invention also relates to the use of the modified carbon nanotubes in conductive and high-strength nanotube/polymer composites, transparent electrodes, sensors and nanoelectromechanical devices, additives for batteries, radiation sources, semiconductor devices (e.g. transistors) or interconnects. | 07-05-2012 |
20120171104 | PROCESS FOR PRODUCING DISPERSION OF SURFACE-TREATED CARBON BLACK POWDER, AND PROCESS FOR PRODUCING SURFACE-TREATED CARBON BLACK POWDER - A method of producing a surface-treated carbon black powder dispersion includes subjecting carbon black fine particles having a volume average particle size of 100 nm to 20 μm to wet granulation and drying by heating to obtain granulated carbon black having a hardness of 12 cN or less and a pH of less than 7, grinding the granulated carbon black to obtain a ground product having a volume average particle size of 20 nm to 20 μm, and subjecting the ground product to wet oxidization in an aqueous medium. The resulting surface-treated carbon black powder dispersion exhibits excellent print density, print quality, discharge stability, and storage stability when used as an inkjet printer aqueous black ink. | 07-05-2012 |
20120183468 | Water-Soluble Functionalized Fullerenes - Provided herein are water-soluble, functionalized fullerenes, and processes for producing water-soluble, functionalized fullerenes. The process includes sulfonating a fullerene in an acidic solution comprising sulfuric acid to produce a sulfonated fullerene, isolating the sulfonated fullerene from the acidic solution without neutralizing the acidic solution, reacting the sulfonated fullerene with hydrogen peroxide to form a reaction product, and isolating a polyhydroxylated fullerene from the reaction product produced from reacting the sulfonated fullerene with the hydrogen peroxide. The process of producing water-soluble fullerenes further includes functionalizing a polyhydroxylated fullerene with one or more pendant functional groups by reacting the polyhydroxylated fullerene with one or more functional group precursors. | 07-19-2012 |
20120201738 | METHOD OF PRODUCING NANO-SIZE GRAPHENE-BASED MATERIAL AND AN EQUIPMENT FOR PRODUCING THE SAME - The present invention is directed to a method of producing nano-size graphene-based material and an equipment for producing the same. The present invention provides a method of producing graphitic oxide by forcing graphite sulfuric slurry and KMnO | 08-09-2012 |
20120275986 | GLASS FRIT AND PROCESS FOR OXIDIZING CARBON MICROPARTICLES USING THE SAME - The present invention is a glass frit comprising 60 to 80% by weight of SiO | 11-01-2012 |
20120308468 | METHOD FOR PRODUCING GRAPHENE BY CHEMICAL EXFOLIATION - Disclosed are a method for preparing pure graphene using chemical bonding between graphite oxide and metal oxide nanoparticles, and graphene and nanoparticles having a quasi metal oxide-graphene core-shell prepared therefrom. | 12-06-2012 |
20120321542 | GRAPHENE FORMATION - Technologies are generally described for forming graphene and structures including graphene. In an example, a system effective to form graphene may include a chamber adapted to receive graphite oxide. The system may also include a source of an inert gas and a source of hydrogen, which may both be configured in communication with the chamber. A processor may be configured in communication with the chamber, the inert gas source and/or the hydrogen source. The processor may be further configured to control the flow of the inert gas from the first source through the chamber under first sufficient reaction conditions to remove at least some oxygen from the atmosphere of the chamber. The processor may also be configured to control the flow of the hydrogen from the second source to the graphite oxide in the chamber under second sufficient reaction conditions to form graphene from the graphite oxide. | 12-20-2012 |
20130022529 | TECHNIQUE FOR MANUFACTURING PLATINUM-MANGANESE DIOXIDE/CARBON COMPLEX FOR USE IN POSITIVE ELECTRODE OF LITHIUM-AIR BATTERY - Disclosed is a method for preparing a platinum-manganese dioxide/carbon complex for a positive-electrode material of a lithium-air battery. More specifically, a manganese dioxide/carbon complex is prepared by dispersing carbon in a manganese dioxide precursor solution and applying microwaves, filtering and drying to the resulting solution. Next a platinum-manganese dioxide/carbon complex is prepared by dispersing the manganese dioxide/carbon complex in ethylene glycol, adding a platinum precursor and applying microwaves to the resulting solution. The platinum-manganese dioxide/carbon complex synthesized according to the present invention exhibits lower overvoltage and higher current density in oxygen reduction and oxidation reactions as compared to either a manganese dioxide/carbon complex or a platinum/carbon complex. | 01-24-2013 |
20130058857 | METHODS AND SYSTEMS FOR CARRYING OUT A PH-INFLUENCED CHEMICAL AND/OR BIOLOGICAL REACTION - The present invention generally relates to methods and systems for carrying out a pH-influenced chemical and/or biological reaction. In some embodiments, the pH-influenced reaction involves the conversion of CO | 03-07-2013 |
20130108539 | Method for Preparing Negative Electrode Material of Lithium Ion Battery | 05-02-2013 |
20130183226 | GRAPHITE OXIDE, GRAPHENE OXIDE OR GRAPHENE, ELECTRIC DEVICE USING THE SAME AND METHOD OF MANUFACTURING THE SAME, AND ELECTRODIALYSIS APPARATUS - Highly-pure graphite oxide, graphene oxide, or graphene is mass-produced. Graphite is oxidized by an oxidizer, so that a graphite oxide solution is obtained, and electrodialysis is performed on the graphite oxide solution to remove aqueous ions, whereby the purity of graphite oxide is increased. Graphene oxide manufactured using the graphite oxide is mixed with powder, and the mixture is reduced, whereby graphene exhibiting conductive properties is yielded and the powder can be bonded. Such graphene can be used instead of a conduction auxiliary agent or a binder of a variety of batteries. | 07-18-2013 |
20130266501 | Direct Production of Large and Highly Conductive Low-Oxygen Graphene Sheets and Monodispersed Low-Oxygen Graphene Nanosheets - Method for making graphene sheets exfoliated by oxidation from graphite by mixing graphite powder with a solution of concentrated sulfuric acid and nitric acid and subjecting the resultant mixture to microware irradiation until a finely dispersed suspension graphene sheets is formed in the solution. Graphene sheets exfoliated by oxidation from graphite are also disclosed. | 10-10-2013 |
20130287671 | MULTIMETALLIC ASSEMBLY, METHODS OF MAKING MULTIMETALLIC ASSEMBLY, METHODS OF OXIDIZING WATER, METHODS OF O-ATOM TRANSFER CATALYSTS, AND METHODS OF CARBON DIOXIDE REDUCTION - Embodiments of the present disclosure provide for multimetallic assemblies, methods of making a multimetallic assembly, methods of oxidizing water, methods of O-atom transfer catalysis, and the like. | 10-31-2013 |
20140037531 | METHOD FOR PREPARING GRAPHENE - The present invention provides a method for preparing graphene, including reacting graphite in an acid solution in which an oxidant is present so as to obtain a graphene. Compared with the prior art, the advantages of the present invention reside in that, the graphene prepared by the method of the present invention has excellent quality and substantially increased yield and production rate, as compared with mechanical stripping, epitaxial growth, and chemical vapor deposition; and the graphene prepared by the method of the present invention has significantly improved quality, substantially reduced structural defects, and significantly increased conductivity, as compared with oxidation-reduction preparation in the solution-phase; besides, the method is also advantageous for a simple process, mild conditions, low cost, and very easy for scale production. The graphene prepared by the present invention has very broad prospects in the fields of lithium-ion batteries, supercapacitors, functional composite materials, transparent conductive films, and microelectronic devices, etc. | 02-06-2014 |
20140120024 | METHODS FOR PREPARATION OF GRAPHENE NANORIBBONS FROM CARBON NANOTUBES AND COMPOSITIONS, THIN FILMS AND DEVICES DERIVED THEREFROM - Methods for producing macroscopic quantities of oxidized graphene nanoribbons are disclosed herein. The methods include providing a plurality of carbon nanotubes and reacting the plurality of carbon nanotubes with at least one oxidant to form oxidized graphene nanoribbons. The at least one oxidant is operable to longitudinally open the carbon nanotubes. In some embodiments, the reacting step takes place in the presence of at least one acid. In some embodiments, the reacting step takes place in the presence of at least one protective agent. Various embodiments of the present disclosure also include methods for producing reduced graphene nanoribbons by reacting oxidized graphene nanoribbons with at least one reducing agent. Oxidized graphene nanoribbons, reduced graphene nanoribbons and compositions and articles derived therefrom are also disclosed herein. | 05-01-2014 |
20140134092 | FACILE SYNTHESIS OF GRAPHENE, GRAPHENE DERIVATIVES AND ABRASIVE NANOPARTICLES AND THEIR VARIOUS USES, INCLUDING AS TRIBOLOGICALLY-BENEFICIAL LUBRICANT ADDITIVES - Methods of ex situ synthesis of graphene, graphene oxide, reduced graphene oxide, other graphene derivative structures and nanoparticles useful as polishing agents are disclosed. Compositions and methods for polishing, hardening, protecting, adding longevity to, and lubricating moving and stationary parts in devices and systems, including, but not limited to, engines, turbos, turbines, tracks, races, wheels, bearings, gear systems, armor, heat shields, and other physical and mechanical systems employing machined interacting hard surfaces through the use of nano-polishing agents formed in situ from lubricating compositions and, in some cases, ex situ and their various uses are also disclosed. | 05-15-2014 |
20140147368 | METHOD FOR PREPARING GRAPHENE OXIDE - The present invention relates to a method for preparing graphene oxide with high yield, in which the yield is increased by controlling the amount and addition rate of each component. | 05-29-2014 |
20140147369 | Methods And Apparatus To Control Reaction Rates Of Chemical Reactions By Applying A Magnetic Field - Methods and apparatus to control reaction rates of chemical reactions. Methods can include mixing chemical reactants to provide a reaction mixture, at least one chemical reactant being magnetic; and applying a magnetic field to the reaction mixture, the magnetic field being applied to effect a control of the rate of a chemical reaction between the reactants in the reaction mixture, the magnetic field being effective to change the reaction rate over a chemical reaction between the same reactants at the same pressure and temperature where the reaction mixture is not exposed to the magnetic field. | 05-29-2014 |
20140154164 | NITRATE SALT-BASED PROCESS FOR MANUFACTURE OF GRAPHITE OXIDE - The present invention relates to a nitrate salt-based process for preparing a graphite oxide. The invention nitrate salt-based process employs starting materials comprising a sulfuric acid, an inorganic nitrate salt, an amount of water, a first amount of chlorate salt, and a graphite. | 06-05-2014 |
20150023863 | MATERIAL AND EXHAUST GAS SYSTEM AND METHOD FOR USING THE SAME - A material is described of formula Na | 01-22-2015 |
20150071844 | Synthesis of Ultra-Large Graphene Oxide Sheets - Ultra-large graphene oxide (UL-GO) sheets are formed using a Langmuir-Blodgett (LB) thin film process. Sulfuric acid and nitric acid are applied to interlayers of natural graphite flake to form graphite intercalation compound (GIC) powders. The GIC powders are expanded at a high temperature, and intercalating agents are used to further oxidize the expanded GIC powders by to exfoliating the EG into monolayer graphene oxide (GO) sheets. The GO is sequentially centrifuged and UL-GO sheets are collected. An LB thin film is prepared from the collected sheets and the thin films are reduced and chemically doped. | 03-12-2015 |
20160060122 | METHODS OF PRODUCING GRAPHENE QUANTUM DOTS FROM COAL AND COKE - In some embodiments, the present disclosure pertains to methods of making graphene quantum dots from a carbon source (e.g., coal, coke, and combinations thereof) by exposing the carbon source to an oxidant. In some embodiments, the methods of the present disclosure further comprise a step of separating the formed graphene quantum dots from the oxidant. In some embodiments, the methods of the present disclosure further comprise a step of reducing the formed graphene quantum dots. In some embodiments, the methods of the present disclosure further comprise a step of enhancing a quantum yield of the graphene quantum dots. In further embodiments, the methods of the present disclosure also include a step of controlling the diameter of the formed graphene quantum dots by selecting the carbon source. In some embodiments, the formed graphene quantum dots comprise oxygen addends or amorphous carbon addends on their edges. | 03-03-2016 |
20160129424 | Catalytic Decomposition of Lower Hydrocarbons to Produce Carbon Oxides Free Hydrogen and Bamboo Shaped Carbon Nanotubes - In accordance with the present subject matter there is provided a process for catalytic decomposition of lower hydrocarbons to produce carbon oxides free hydrogen and bamboo shaped carbon nanotubes over a catalyst composition. The process for catalytic decomposition of lower hydrocarbons comprises contacting lower hydrocarbon over a catalyst composition, where the catalyst composition comprising, a catalyst, at least one modifying agent and a support material. | 05-12-2016 |
20160130149 | PROCESS FOR THE SYNTHESIS OF GRAPHENE AND GRAPHENE DERIVATIVES FROM GREENHOUSE GASES AND OTHER CARBONACEOUS WASTE PRODUCTS - Methods and processes are disclosed that utilize carbonates produced as a result of the conversion of carbon dioxide that are heated under conditions inhibiting complete combustion to produce vapors promoting polycyclic aromatic hydrocarbon formation in the formation of graphene, graphene derivatives and other useful nanoparticles as desired. In some embodiments, the waste gasses and streams from processes of extracting or processing carbonaceous materials are collected and refluxed with at least one solvent to promote polycyclic aromatic hydrocarbon formation under conditions that inhibit complete combustion of the carbonaceous material can be used in the production of graphene, graphene derivatives and other useful nanoparticles. In some embodiments, waste gasses from processes of extracting or processing carbonaceous materials are collected and used in the production of graphene, graphene derivatives and other useful nanoparticles. | 05-12-2016 |
20160137506 | GRAPHITIC NANOMATERIALS IN THE FORM OF CARBON ONIONS, PRODUCTION METHOD THEREOF AND USE OF SAME - The present invention relates to graphite nanomaterials in the form of onion-like carbons, the method of preparation thereof and the use thereof. | 05-19-2016 |
20160199811 | Method of Increasing Adsorption in Biochar by Controlled Oxidation | 07-14-2016 |
20190144284 | FUNCTIONALISED GRAPHENE | 05-16-2019 |
20190144285 | GRAPHENE OXIDE PARTICLES AND METHOD OF MAKING AND USING THEM | 05-16-2019 |