1120results about How to "High chemical activity" patented technology

The invention discloses a graphene-based ternary composite film gas sensor and a preparation method thereof. The graphene-based ternary composite film gas sensor consists of a ternary composite film and a substrate, wherein the ternary composite film is formed by compounding graphene, metal or metal oxide nanoparticles and conducting polymers. The high specific surface area and excellent electric and physicochemical characteristics of the graphene and the nanoparticles and the specific gas-sensitive response characteristic of the conducting polymers are fully utilized, a gain complementary mechanism is formed between different materials due to ternary compounding, and the gas-sensitive characteristic and stability of the system are enhanced. Meanwhile, the preparation method is combined with a self-assembling process with high ordering property and can be used for preparing the high-sensitivity room temperature detection gas sensor.

The invention provides a technique for combining joint needle coke and light oil products, comprising the following steps that: firstly, thermal pretreatment of hydrocarbon raw materials is performed, and rapid cracking reaction compositions and rapid condensation reaction compositions are respectively cracked and condensed into light oil fractions (with a distillation range of 360 DEG C below zero) and heavy residual fuel oil (with a distillation range of 540 DEG C); secondly, the needle coke is prepared by delayed coking of residual hydrocarbon-enriched vacuum gas oil fractions (with a distillation range of between 360 and 540 DEG C), wherein, the heavy residual fuel oil obtained during the process of thermal pretreatment is taken as common delayed coking mixing feeding materials, and the light oil fractions obtained during the two stages can be distilled so as to obtain gasoline and diesel oil fractions with high added-value. The hydrocarbon raw materials used comprise mixture of one type or a plurality of types among virgin wax oil, coked wax oil, dense oil, atmospheric and vacuum residue, ethylene char oil an so on. The combination technique is characterized by mild thermal pretreatment condition (with a reaction temperature of between 380 and 495 DEG C). The technique has the advantage of simultaneously enlarging the source of needle coke raw materials and the means of converting heavy inferior raw oil into light inferior raw oil.

A device and method a provided for mixing and enhancing reaction between oil and a non-oil liquid by exploiting the formation, implosion and explosion of numerous cavitation bubbles within a cavitation device. Intense localized energy from the collapse of the cavitation bubbles subjects the mixture to intense heat and pressure, thereby accelerating reaction between the oil and non-oil liquid. In one embodiment, the non-oil liquid is an alcohol, and the cavitation device is used to enhance a transesterification reaction to convert the oil and alcohol into biodiesel in the presence of a catalyst.

The high efficiency nanometer water purificant consists of polyacrylamide, nanometer active carbon, etc. It includes two components, the component A comprising polyacrylamide 80-98 % and soluble chitosan 2-20 %, and the component B comprising nanometer active carbon 80-90 %; nanometer TiO2 1-3 % and polyacrylamide 9-17 %. The present invention is one new kind of water treating preparation with high neutralizing, bridging, permeating and adsorbing capacity, high sewage purifying effect, fast sewage purifying speed and small consumption.

The invention discloses a glaze material for Jun red glaze and a process for preparing Jun porcelain from the glaze material. The glaze material consists of the raw materials of melilite, quartzite, calcite, white feldspar, copper ore, ZnO, SnO, GuO, talc, BaO, zirconium silicate and spodumene. The preparation process comprises the following steps: firstly, smashing roughcast raw materials and conducting moulding to fire a plain roughcast, then immersing the plain roughcast into slurry of the glaze material of the Jun red glaze for glazing, and when the slurry adhered on the surface of the plain roughcast is dried, putting the plain roughcast in a kiln for firing, so as to obtain the Jun red glaze Jun porcelain. According to the glaze material for the Jun red glaze and the process for preparing the Jun porcelain by utilizing the glaze material, spodumene and zirconium silicate are added in the glaze material for the Jun red glaze, so that the fired Jun red glaze Jun porcelain is bright in color, mild and smooth in glaze surface, and uniform in cracking, and breaks through the condition that the general Jun red glaze Jun porcelain is dim in color and nonuniform in cracking; the Jun porcelain is taken as the specialty of China, and represents the advanced level of the manufacture process of China, and the social value of the Jun porcelain is improved.

The invention provides a fireflooding channeling sealing agent and its preparation method. Raw materials for preparing the fireflooding channeling sealing agent contain, by weight, 0.5-3% of a melamine substance, 0.2-1% of phenol, 2-8% of aldehyde, 0.5-2% of a pH regulator, 0.2-1.2% of a nano-alumina oleoresin liquid XZ-LY102, 10-20% of ultrafine silicon dioxide and the rest of water. Sealing rate of the fireflooding channeling sealing agent can reach 93%; temperature resistance reaches 300 DEG C; the highest salinity tolerance reaches 150,000 mg/L; expriation data can reach 6 months and above under the steam condition of 300 DEG C; viscosity of a profile control agent before gel forming is 150-1,500 mPa.S; sealing strength can reach 31 MPa/m; and gel forming time can be controlled within 12-36h. By the use of the fireflooding channeling sealing agent, deep profile control of an oil layer can be realized.

Disclosed are a cerium oxide abrasive for selectively polishing various SiO₂ films and SiO₂—Si₃N₄ films; and a slurry containing the same. The cerium oxide abrasive and the polishing slurry of the present invention have a high polishing rate and are also free from microscratches in a polished surface upon polishing since polycrystalline cerium oxide having a mean crystalline particle size of 5 nm or less is synthesized by using hexagonal cerium carbonate having a hexagonal crystal structure as a raw material of cerium.

The invention relates to the technical field of new energy materials, and in particular to a vanadium disulfide/graphene composite material and a preparation method therefor. The preparation method comprises the following steps: dissolving a vanadium source into water and uniformly mixing with an excessive amount of sulfur source to obtain a mixed solution A, uniformly mixing graphene oxide with the mixed solution A, performing reaction at the temperature of 150-200 DEG C, and after the reaction to obtain the vanadium disulfide/graphene composite material. The preparation method is simple in process, mature in technology, available in equipment and quite good for the commercial promotion; according to the prepared vanadium disulfide/graphene composite material, the shortcomings of the vanadium disulfide and graphene are overcome by each other; the chemical activity of the material is improved, and the vanadium disulfide/graphene composite material can be used as the chemical active material to be applied to lithium ion battery negative electrodes; and the obtained lithium ion battery is quite good in circulation reversibility and relatively high in specific capacity.

The invention belongs to the technical field of a nanomaterial, and specifically relates to an iron-nitrogen-doped graphene porous material with dual-site catalytic oxygen reduction activity, and a preparation method and an application therefor. The porous material is formed by embedding graphite-carbon-coated iron carbide into a nitrogen-doped porous graphene band network structure; the preparation method for the iron-nitrogen-doped graphene porous material comprises the steps of preparing a graphene oxide solution; adding a proper amount of conductive macromolecular pyrrole to the graphene oxide solution; obtaining uniform hydrogel through a hydrothermal process; performing oxidative polymerization on the hydrogel by ferric iron; then dispersing the hydrogel into a fresh ferric iron solution to complete adsorption; then performing drying and high-temperature carbonization thermal processing; and finally removing non-active and free iron phase from the reaction system by dilute acid so as to obtain the iron-nitrogen-doped graphene porous material. The porous material can be used as the negative electrode catalyst for a fuel cell, and shows quite high catalytic oxygen reduction activity, so that the porous material has quite important research meaning and bright application prospects.

The invention relates to a defoaming agent composition which is prepared by compounding 20-30 parts by mass of branched polyether, 10-20 parts by mass of modified nano silica, 20-30 parts by mass of polyorganosiloxane and 20-30 parts by mass of a solvent. The defoaming agent composition combines the hyperbranched polyether and the modified nano silica together, has an obvious synergistic effect, so that the hyperbranched polyether and the modified nano silica can be more compatible, defoaming properties of the hyperbranched polyether and the modified nano silica in high temperature environment can be increased, when the adding amount is about 30 mug / g, the defoaming rate can reach more than 90%, and the defoaming performance is strong.

The invention relates to a qunatum carbon which comprises carbon particles with the particle size of 0.6-100nm, wherein the carbon particles are mono carbon and/or graphene particles; and the surface layer of the carbon particles contain carbon, hydrogen, oxygen and nitrogen compounds, which comprise condensed aromatics, compounds containing carbon-oxygen single bond, compounds containing carbon-oxygen double bond and compounds containing carbon-hydrogen bond. The invention also relates to a qunatum carbon solution which is a water solution containing qunatum carbon. The ORP of the qunatum carbon solution is 280-380mv, the electric conductivity sigma is 1-5ms/cm, the electromotive force is 280-380mv, the pH value is 1.5-3.2, and the concentration is 0.1-0.45%. The invention also relates to a device and method for preparing the qunatum carbon. The method has the advantages of simple technique, low cost, no generation of three wastes, uniform carbon particle size and stable product quality, is easy to control, and can easily implement large-scale production.

This invention discloses a method for preparing controllable phase-transformation and tungsten-doped vanadium dioxide powder. In this invention, controlled, strictly, is the pH value (being at 7-9) of the solution for preparing prodecessor; selected is combined reductant containing organic amine and formic acid; protected by inert gas during whole process. By using this inventive method, obtained is high pureness single-phase VO2 nanometer powder. Due to the activity of white tungstic acid is far higher than that of other tungsten compounds, the adulteration of W6+ in VO2 crystal lattice is increased greatly, to achieve the effective adulteration, and then to realize controllable phase transformation temperature.

The invention relates to a surface modified product of an acicular wollastonite crystal and a production method thereof. The product is micro-nano composite powder by coating a nanometer calcium carbonate crystal on the surface of the acicular wollastonite fiber crystal. The method comprises the following steps: firstly, preparing an active lime milk solution and an acicular wollastonite fiber solution; compounding the two solutions into a suspension; adding a crystalline directing agent to the suspension and filling CO2 gas for a coating reaction so that the nanometer calcium carbonate crystal gradually grows on the surface of an acicular aedelforsite fiber, and the micro-nano composite powder by coating a nanometer calcium carbonate crystal on wollastonite is obtained; and coating a layer of coupling agent on the surface of the micro-nano composite powder to obtain the acicular wollastonite fiber crystal-nanometer calcium carbonate crystal-coupling agent composite powder material. The product keeps the superior characteristics of the acicular wollastonite crystal and the nanometer calcium carbonate crystal, improves the surface energy and the chemical activity of wollastonite composite particles and can be well stuck with organic polymers so as to form a favorable interface and improve the bonding force between fillings and basal bodies, such as plastics, pulp, and the like.

The invention discloses an electrophoretic aluminum alloy building proximate matter with high performance and a preparation method thereof, and belongs to the technical field of aluminum alloy application. The electrophoretic aluminum alloy building proximate matter consists of following ingredients by mass: 0.5 to 0.54 percent of Mg, 0.4 to 0.44 percent of Si, 0.04 to 0.08 percent of RE, 0.01 to 0.02 percent of Ti, 0.002 to 0.004 percent of B, 0 to 0.2 percent of Fe and remaining aluminum. The preparation method of the electrophoretic aluminum alloy building proximate matter consists of following steps: a misch metal ingot, an alloy of Al, Ti and B, and a pure aluminum ingot are smelted into a refining and modifying agent of RE, Al, Ti and B; the refining and modifying agent is added during an alloy smelting process and cast into an aluminum rod; the electrophoretic proximate matter with high performance is prepared by techniques of squeeze aging and oxidizing electrophoresis, etc. By utilizing rare earth to subdivide second-phase particles, electrophoretic paint films of the proximate matter that are obtained by improving surface processing performance have higher uniformity, adhesive attraction, wear resistance, corrosion resistance and large film thickness than common proximate matters, and can be widely used for aluminum alloy doors and windows of buildings and curtain walls.

The invention relates to a method for modifying a nanometer sol ultrahigh molecular weight polyethylene fiber by plasma treatment. The method comprises that: (1) inorganic nanometer particle is prepared into a sol solution by an ultrasonic shock technique; or (2) a precursor solution of the organic-inorganic nanometer particle is subjected to hybridization reaction with the inorganic nanometer particle to prepare the sol solution; (3) the sol solution is coated on the surface of the ultrahigh molecular weight polyethylene fiber; and (4) the ultrahigh molecular weight polyethylene fiber is dried at a temperature of 10 and 150 DEG C, and the solvent is collected; the ultrahigh molecular weight polyethylene fiber is introduced in a plasma atmosphere region by a plasma generator for plasma surface modification; and the treated ultrahigh molecular weight polyethylene fiber is on-line rolled by an automatic rolling machine. The compound property between the treated ultrahigh molecular weight polyethylene fiber and the organic matrix materials is greatly improved; moreover, the method also has the advantages of simple process, good treatment effect, low cost, environmental protection and low energy consumption.

The invention discloses a pH (potential of hydrogen) responsive metal organic framework nanometer crystal, a preparation method and application. The pH responsive metal organic framework nanometer crystal comprises a metal organic framework and a pH responsive segment, wherein the pH responsive segment is graftedadhered to an organic ligand of the metal organic framework, and can be a pH responsive polymer, a chain segment containing a carboxylic group, or a chain segment containing a pyridine group. The pH responsive metal organic framework nanometer crystal has the advantages that the pH responsive segment is grafted onto the organic ligand of the metal organic framework, so that the contact angle of the metal organic framework is changed, namely that the hydrophilicity and hydrophobicity properties of the metal organic framework are changed, thereby increasing the interface activity of the pH responsive metal organic framework; the pH responsive segment has response property to the change of the pH value of the surrounding environment, the pH responsive metal organic framework has different hydrophilicity and hydrophobicity properties under different pH values, and then the pH responsive metal organic framework can be separated and recycled by adjusting the pH value.

The invention relates to a preparation method of nitrogen and sulfur co-doping ordered mesoporous carbon materials. According to the method, pyrrole is used as carbon sources and nitrogen sources, sulfuric acid is used as acid catalysts and sulfur sources, pyrrole oligomers are used as precursors, mesoporous silica molecular sieves SBA-15 (space group P6mm) and KIT-6 (space group Ia3d) are used as templates, a primary wet impregnation method is combined with the high-temperature themolysis technology for preparing the nitrogen and sulfur co-doping ordered mesoporous carbon materials in two-dimensional orthohexagonal and three-dimensional cubic ordered mesostructures.