The present disclosure relates to a carbon fiber composition and a fabrication method for high-performance carbon fiber using the same. The method can fabricate high-performance carbon fiber (or graphite fiber) with lowering a graphitization temperature by using graphene carbon fiber composition including nano-sized graphene.

A reactor and method for production of nanostructures, including metal oxide nanowires or nanoparticles, are provided. The reactor includes a regulated metal powder delivery system in communication with a dielectric tube; a plasma-forming gas inlet, whereby a plasma-forming gas is delivered substantially longitudinally into the dielectric tube; a sheath gas inlet, whereby a sheath gas is delivered into the dielectric tube; and a microwave energy generator coupled to the dielectric tube, whereby microwave energy is delivered into a plasma-forming gas. The method for producing nanostructures includes providing a reactor to form nanostructures and collecting the formed nanostructures, optionally from a filter located downstream of the dielectric tube.

The present invention relates to the technical field of preparation of a nickel cobalt lithium manganese oxide positive electrode material. Disclosed are a power-type nickel cobalt lithium manganese oxide material and a preparation method therefor and uses thereof. The preparation method comprises: adding an organic acid into a mixed aqueous solution of a lithium source, a nickel source, a cobalt source and a manganese source, aging, obtaining a sol precursor, obtaining a gel fiber through electrospinning, and obtaining the power-type nickel cobalt lithium manganese oxide material after calcination. In the present invention, the nickel cobalt lithium manganese oxide material of a nano-fiber structure is prepared by using a sol-gel electrospinning method, and the nickel cobalt lithium manganese oxide material of a nano-fiber structure has a uniform structure size, thereby effectively reducing surface energy, and improving a capacity of lithium ions.

Provided are a method for preparing a nanotube array, a nanotube array and a device. The method includes: preparing a double-layer two-dimensional material with a relative angle of lattice orientations, which is used as a template; determining the chiral parameters of nanotubes to be prepared corresponding to the relative angle of the lattice orientations of the double-layer two-dimensional material, determining a nanoribbon orientation and a nanoribbon width according to the determined chiral parameters, determining the inter-nanoribbon spacing according to the density of the nanotubes to be prepared and the nanoribbon width, and etching the double-layer two-dimensional material according to the determined nanoribbon orientation, nanoribbon width and inter-nanoribbon spacing to obtain a nanoribbon array of the double-layer two-dimensional material; and performing thermal excitation treatment on the obtained nanoribbon array of the double-layer two-dimensional material to obtain a nanotube array. The present disclosure can prepare a nanotube array with controllable density, orientation and chirality.

A process for the synthesis of nanocrystals of metal chalcohalides is disclosed, where M is a metal, E is a chalcogen and X is a halogen, starting from a salt of M. The process includes the following steps: a) a precursor of metal M is mixed with a surfactant in a solvent having a boiling point higher than 180 C.; b) the mixture obtained in previous step a) is heated, in order to dissolve the components, until it becomes clear; c) the solution is heated up under inert atmosphere at the desired temperature; d) chalcogen and halogen precursors in 0 a solvent having a boiling point higher than 180 C. are added through injection, while heating the solution obtained in steps a) to c); e) after the reaction time has elapsed, the product is quenched down to room temperature.

Niobate particles include molybdenum and are represented by K.sub.xNa.sub.(1-x)Nb.sub.yO.sub.z, where X=0 to 1, y=1 to 10, and z=3 to 20. Preferably, the niobate particles are niobate particles including at least one selected from the group consisting of K.sub.xNa.sub.(1-x)NbO.sub.3 particles having a cubic shape, K.sub.2Nb.sub.4O.sub.11 particles having a columnar shape, a wire shape, or a ribbon shape, K.sub.4Nb.sub.6O.sub.17 particles having a plate shape, and KNb.sub.3O.sub.8 particles having a columnar shape, a wire shape, or a ribbon shape.

A nanostructure includes a plurality of substantially spherically curved carbon layers having diameters in a range of 1 nanometer to 1000 nanometers and a plurality of halogen atoms attached to an outer convex side of the carbon layers. A composition of matter includes a liquid fuel and an additive including at least one liquid and a plurality of carbon nano-onions. A method of fabricating an additive for liquid fuel includes creating a carbon-based material using a plasma in an environment including at least one hydrocarbon gas and/or at least one liquid containing hydrocarbons, organometallic metal-complex, and/or element-organic compounds, evaporating organic material from the carbon-based material, halogenating the carbon-based material, and extracting carbon nano-onions from the halogenated carbon-based material.

A method for preparing a graphene nanoplatelets (GNP) based soluble oil for an AAC (Autoclaved Aerated Concrete) block is disclosed. The method comprises, preparing a first batch of a soluble oil, preparing a second batch of the soluble oil, mixing the first batch of the soluble oil with the second batch of the soluble oil to obtain a second mixture, adding a tri-sodium orthophosphate solution to the second mixture to obtain a third mixture, adding graphene nanoplatelets to the third mixture to obtain a fourth mixture, and obtaining the GNP based soluble oil by adding a water-soluble acrylic resin solution to the fourth mixture.

Provided herein is a method for preparing graphene-oxide, the method including contacting graphene and at least one oxidant in a solution including at least one acid solvent thereby forming graphene-oxide.

A method for fabricating graphene nanoribbons by depositing molecules of a precursor directly on a surface of a substrate that is atomically pure, wherein the precursor is a polycyclic aromatic compound having halogen atoms; polymerizing the molecules of the precursor on the surface; and cyclodehydrogenating the polymerized structures under high vacuum conditions to obtain the graphene nanoribbons. A method for fabricating graphene nanoflakes by: depositing molecules of a precursor directly on a surface of a substrate, wherein the precursor is a polycyclic aromatic compound; and cyclodehydrogenating the precursor under high vacuum conditions to obtain the graphene nanoflakes.