51results about How to "Excellent morphology" patented technology

The invention discloses an oxygen evolution Fe-doped cobalt diselenide@N-CT compound catalyst and a preparation method and application thereof. The compound catalyst comprises Fe-doped CoSe2 nano particles coated by an N-doped carbon nanotube. The preparation method includes: evaporating and drying the solution of cobalt acetate, iron nitrate and urea, and performing high-temperature treatment to obtain the Fe-doped CoSe2 nano particles coated by the N-doped carbon nanotube; mixing the Fe-doped CoSe2 nano particles coated by the N-doped carbon nanotube with Se powder to obtain a mixture, and performing selenylation on the mixture under protective atmosphere to obtain the compound catalyst. The preparation method has the advantages that the method is simple, low in cost and beneficial to industrial production; the prepared Fe-doped CoSe2@N-CT (recorded as FCS@N-CT) compound catalyst is applicable to electrocatalytic water decomposition, and the compound catalyst is good in comprehensive performance as compared with a commercial RuO2 catalyst and is promising in application prospect.

The invention discloses a nitrogen-doped graphdiyne riveted transition metal monatomic catalyst as well as a preparation method and application thereof. According to the catalyst, nitrogen atoms are doped in a novel carbon material graphdiyne carrier, transition metal single atoms are riveted on the surface of nitrogen-doped graphdiyne through the covalent effect between the transition metal single atoms and N and C atoms, and thus transition metal is uniformly dispersed on the surface of the nitrogen-doped graphdiyne in a single atom form to form the catalyst. Transition metal atoms in the catalyst are uniformly dispersed on the surface of the nitrogen-graphdiyne-based catalyst in a single atom state, a large number of active sites are provided for oxidation-reduction reaction, graphdiyneis adopted as a carbon substrate and has excellent morphological characteristics, formation of catalytic active sites is facilitated, and catalytic advantages of single atoms are brought into play. The catalyst disclosed by the invention has high electrocatalytic activity on oxygen reduction under an alkaline condition, is simple and effective in preparation process, low in cost and easy to popularize and put into production, and has important significance in the field of fuel cell development and application.

A multinuclear transition metal compound which has two or more catalytic active sites, and is useful in preparing the olefin polymer and copolymer, is disclosed. The multinuclear transition metal compound for olefin polymerization includes two or more metals, and at least one ligand having a cyclopentadienyl moiety, which connects the two or more metals. The preferable multinuclear transition metal catalyst for olefin polymerization includes the first transition metal, the first η ligand having a cyclopentadienyl moiety, which is coordinated to the first transition metal, and the second transition metal to which the second η ligand having a cyclopentadienyl moiety is coordinated, wherein the second transition metal is bonded to the first η-ligand via a sigma (σ) bond.

The invention relates to a hypsizigus marmoreus strain Finc-B-5, and a culture method, a planting method and application thereof. The hypsizigus marmoreus strain is named as Finc-B-5, belongs to hypsizigus marmoreus and is collected in General Microorganism Center of China Microbiological Culture Collection Management Committee, which is located at No.3, No.1 yard, Beichen west road, Chaoyang district, Beijing. The collection number is CGMCC No.11203, and the collection date is August 13 of 2015. Compared with the prior art, the hypsizigus marmoreus strain Finc-B-5 has the advantages that yield per unit is high, culture and planting periods are short, raw material conversion rate and factory production efficiency are improved greatly, energy is saved, and consumption is reduced; preservation period is long, long-distance transportation is facilitated, shelf life is prolonged, and significance in commercial popularization is great; the shape characteristics are excellent, and product subpackage and sales are really benefited; the mouthfeel is good, and customer acceptability is high; in conclusion, the Finc-B-5 has excellent overall performance and broad market prospect.

A method of producing a magnesium compound by reacting the following components (i), (ii) and (iii):(i) metal magnesium(ii) an alcohol(iii) a metal dihalide compound represented by the general formula (I) containing at least 0.001 mole of M relative to one mole of magnesium of the metal magnesium (i)MX2  (I)where X is a halogen atom and M is Mn, Fe, Co or Zn.

A process for preparing the in-situ symbiotic thin-wall carbon nano-tubes and iron nanowires filled in said nanotube includes such steps as dissolving ferrocene in Cl contained organic solvent, filling Ar gas in air-tight quartz tube, heating, controlling the temp at the end of capillary tube inserted in said quartz tube to be 250-300 deg.C, filling H2, pumping said solution in reactor, reaction, stopping to fill H2, and cooling.

The invention discloses a hydrothermal method preparation technology for BiVO4 nanowires and belongs to the technical field of semiconductor nanomaterial preparation. The hydrothermal method preparation technology comprises the steps: firstly, spin coating and calcining a BiVO4 seed solution on FTO glass to obtain a BiVO4 seed layer; then preparing BiVO4 nanowires in a reaction kettle through a hydrothermal method; finally, putting the prepared BiVO4 nanowires in a tube furnace to be annealed in high temperature. The hydrothermal method preparation technology disclosed by the invention is simple in preparation process, easy to operate, free of expensive equipment in the whole preparation process and low in cost; the prepared BiVO4 nanowires have good crystal form and high photocatalytic activity; the preparation process is performed in the reaction kettle, so that the FTO glass is convenient to take and put, and a sample is prevented from being damaged; furthermore, temperature in the reaction kettle can be very high, so that an effect of reaction temperature larger than 100 DEG C on growth of the BiVO4 nanowires can be explored. The hydrothermal method preparation technology disclosed by the invention has no toxic or harmful matter generation in the whole preparation process, has no pollution on environment, has no harm to human health and is safe and environment-friendly.

A magnesium compound obtained by reacting the following components (i) (ii) and (iii): (i) metal magnesium (ii) an alcohol (iii) a metal dihalide compound represented by the general formula (I) containing at least 0.001 mole of M relative to one mole of magnesium of the metal magnesium (i) MX2  (I) where X is a halogen atom and M is Mn, Fe, Co or Zn.

The invention relates to a synthesis method of a mesoporous carbon nanosphere loaded manganous oxide material, and relates to the technical field of preparation of a nanometer material. Water, a hydrochloric acid solution, aniline and silicon dioxide sol are subjected to ultrasonic mixing and are then mixed with ammonium persulfate for reaction; aniline coated silicon dioxide is obtained; through the mixing reaction with a sodium hydroxide water solution, mesoporous polyaniline is obtained; then, under the ultrasonic condition, the mesoporous polyaniline with the pH value being 1 to 2 reacts with a potassium permanganate water solution under the stirring condition to obtain aniline loaded manganese dioxide; under the nitrogen gas protection, 900 DEG C calcination is performed to obtain the mesoporous carbon nanosphere loaded manganous oxide material. The synthesis method has the advantages that the method is simple and convenient; the preparation cost is low; the product has the good appearance features and also has high oxygen reduction catalysis activity; the important application values are realized in the fields of catalysis and the like.

The invention discloses lithium iron phosphate with a controllable morphology and a preparation method of lithium iron phosphate. The lithium iron phosphate is characterized in that the morphology of the lithium iron phosphate can be controlled by a control agent; lithium iron phosphate particles with fibroid, flake and spherical morphologies and significant topographic characteristics are obtained by inhibiting and reducing the growth speeds of the lithium iron phosphate on different crystal faces. Furthermore, the preparation method comprises the following steps: plastifying and homogenizing materials by adopting two-stage reaction of a dynamic mill type screw reactor; carrying out crystallization reaction and shearing carbonization, thereby finally obtaining the lithium iron phosphate particles with different morphologies. The lithium iron phosphate obtained by the preparation method is not only obvious in topographic characteristics, but also even and stable, and high in degree of crystallinity, and can achieve continuous controllable production.

A method for making magnesium-halide supports of a specified particle shape, average diameter and particle diameter distribution comprises providing a non-aqueous solution of a magnesium-halide containing silica particles dispersed therein, and crystallizing the magnesium-halide about the silica particles to provide the magnesium-halide support, wherein the magnesium-halide support has an approximately spherical shape, an average particle diameter from about 2 to about 120 microns, and a particle diameter distribution from about 1 to about 200, are provided. The invention further provides methods for making catalysts and using same in polymerization reactions. Catalyst supports and catalysts are also provided.

The invention relates to a method for artificially synthesizing natural minerals, in particular to a method for preparing a nano-micronlamellar chalcopyrite microcrystal polymerunderhydrothermal conditions. The method for preparing the nano-micronlamellar chalcopyrite microcrystal polymerunder the hydrothermal conditions is characterized by using ferrous sulfate heptahydrate (FeSO<4> 7H<2>O), copper sulfate pentahydrate (CuSO<4> 5H<2>O) and thiourea (H<2>NCSNH<2>) as raw materials. The method includes the following steps of a, preparing mixed solution; b,heating; c,cooling; d,filtering; e,drying and preserving to obtain the nano-micronlamellar chalcopyrite microcrystal polymer. By aiming at the problems that the molding of the synthesized chalcopyrite is not easy to control under the hydrothermal conditions, and a product is not environmentally friendly, and the like, the thiourea as an organic complexing agent is selected as a source of sulfur, the thiourea is used as a strong ligand,and sulfur atoms of the thioureaare selectively complexed with transition metal ions to form Cu, Fe complex cation complexes for promoting hydrothermal reaction and reducing impurity phases.

The invention provides a nano composite fiber. The nano composite fiber is prepared by the following steps: chitosan is dissolved in an acetic acid aqueous solution to prepare a chitosan solution withthe concentration of 5.5%-5.9%; and 28-45 parts of a 11%-15% polyvinyl alcohol solution is added into 85-120 parts of the chitosan solution and blended, then uniform ultrasonic dispersion is conducted, and still standing and defoaming are conducted to obtain a spinning solution. The invention also provides a preparation method of the nano composite fiber. According to the nano composite fiber, the weight part ratio of the chitosan solution to the polyvinyl alcohol solution is given, so that the nano composite fiber with smooth morphology and strong interaction can be obtained; and by improving process parameters, the spinning performance of chitosan is improved, and the morphological characteristics of the nano composite fiber can be improved.

The invention provides a method for preparing spherical cobalt powder. The method includes the following steps of mixing CoCL2.6H2O with polyhydric alcohols, adding alkali liquor, preparing mixed solutions with the cobalt concentration of 5-30g / L, heating for 196-198 DEG C, reflux carried out for 2-4 hours, suction filtration, washing, hydrogen drying and reduction under the temperature of 300-500 DEG C, and preparing the cobalt powder. According to the method, the cobalt salt CoCL2.6H2O is directly utilized to be reacted with the polyhydric alcohols to prepare the spherical cobalt powder, and consumed time is shortened by 40%-60% of the time of a traditional cobalt salt reduction method. According to the method, the polyhydric alcohols and the hydrogen drying and the reduction under a high temperature are adopted, not only is spherical appearance of the polyhydric alcohol reduction cobalt powder saved, but also purity of the cobalt powder is improved, under the condition that the cobalt concentration is up to 5-30g / L in an industrialized process, the prepared spherical cobalt powder has good appearance characteristics, the grain size of products can be controlled, and the cobalt conversion rate is up to more than 98%.

The invention relates to an alkali metal based aluminum nitride nano-material and a preparation method thereof. The technical scheme includes: firstly mixing 65-77wt% of sodium chloride, 2-6wt% of sodium fluoride, 8-12wt% of aluminum powder and 10-20wt% of sodium azide evenly to obtain a mixture, loading the mixture into a corundum crucible, then placing the corundum crucible in a tubular corundum furnace to carry out reaction at 850-1150DEG C in nitrogen atmosphere for 2.5-3.5h, performing cooling to room temperature, taking out the product, then washing the product 3-5 times, and conducting drying at 90-110DEG C for 4-8h, thus obtaining the alkali metal based aluminum nitride nano-material. According to the invention, the method is simple and the cost is low, the prepared alkali metal based aluminum nitride nano-material has high purity and excellent appearance characteristics.

The invention relates to the technical field of edible fungi, and in particular relates to a hypsizygus marmoreus strain and a culture method thereof. The hypsizygus marmoreus strain WZ-29 has a preservation number of GDMCC NO: 60276. Hypsizygus marmoreus grown from the hypsizygus marmoreus strain WZ-29 disclosed in the invention has extremely high homogeneity and excellent morphological characteristics, so that packaging and sale of the product and establishment of an edible fungus brand are facilitated. In addition, the strain has a short culture and cultivation period and stable biologicalcharacteristics, and greatly improves the production efficiency and stability of a plant; and yield per unit is high, every bottle is basically consistent when mass production is performed, and the strain has broad application prospects.

A method for preparing boron carbide by utilizing a gas-solid method comprises the following steps: separately placing a boron source and a carbon source, and heating to 1300 to 2000 DEG C under the protection of a vacuum or inert atmosphere, thus generating boron oxide steam by the boron source; enabling the boron oxide steam to react with carbon provided by the carbon source. The method disclosed by the invention is capable of preparing the boron carbide in higher granularity and distribution uniformity.

Quality of one-surface planar processed group 3 nitride wafers depends upon a direction of pasting of wafers on a polishing plate. Low surface roughness and high yield are obtained by pasting a plurality of group 3 nitride as-grown wafers on a polishing plate with OFs or notches facing forward (f), backward (b) or inward (u) with thermoplastic wax having a thickness of 10 μm or less, grinding the as-grown wafers, lapping the ground wafers, polishing the lapped wafers into mirror wafers with a bevel of a horizontal width of 200 μm or less and a vertical depth of 100 μm or less.

The invention relates to an alkali metal salt based Sialon powder material and a preparation method thereof. The technical scheme includes: firstly taking 60-72wt% of sodium chloride or magnesium chloride, 2-6wt% of sodium fluoride, 9-15wt% of aluminum powder, 5-8wt% of silicon powder and 10-15wt% of silicon dioxide micropowder as raw materials, additionally adding sodium azide accounting for 10-20wt% of the raw materials, mixing the materials evenly to obtain a mixture, then loading the mixture into a corundum crucible, and placing the corundum crucible into a tubular corundum furnace, carrying out reaction at 1200-1400DEG C in nitrogen atmosphere for 2.5-3.5h, performing cooling to room temperature, and taking out the product, finally washing the product 3-5 times, and drying the product at 90-110DEG C for 4-8h, thus obtaining the alkali metal salt based Sialon powder material. The method provided by the invention has the characteristics of low cost and suitability for industrial production, and the prepared alkali metal salt based Sialon powder material has good oxidation resistance, high bending strength and excellent appearance characteristics.

The invention relates to titanium nitride powder based on a low temperature liquid polymerization process and a preparation method of the titanium nitride powder. According to the technical scheme, the method comprises the following steps: mixing metal magnesium powder, alkali metal inorganic salts and titanium dioxide powder according to a molar ratio of 1:(1.5-2.0):(0.25-0.50); or mixing metal magnesium powder, alkali metal inorganic salts and sodium titanate powder according to a molar ratio of 1:(1.5-2.0):(0.06-0.08); respectively maintaining the temperature of respectively mixed powder for 2-6 hours in a nitrogen atmosphere and under the condition of 900-1300 DEG C, and naturally cooling; adding the fired product into a hydrochloric acid solution for soaking for 5-6 hours, washing 3-5 times by using distilled water, and drying for 8-12 hours under the condition of 90-110 DEG C, so as to obtain the titanium nitride powder based on the low temperature liquid polymerization process. The titanium nitride powder disclosed by the invention has the characteristics of rich raw materials, low production cost and simplicity in industrial production. The titanium nitride powder prepared by the method is high in purity and excellent in morphology characteristics.

A process for preparing the in-situ symbiotic thin-wall carbon nano-tubes and iron nanowires filled in said nanotube includes such steps as dissolving ferrocene in Cl contained organic solvent, filling Ar gas in air-tight quartz tube, heating, controlling the temp at the end of capillary tube inserted in said quartz tube to be 250-300 deg.C, filling H2, pumping said solution in reactor, reaction, stopping to fill H2, and cooling.

The invention relates to a method for preparing gas self-assemble silicon quantum annular nanometer structure, wherein it comprises that: in the plasma strengthen chemical gas deposit system (PECVD), on the substrate silicon surface, processing the pretreatment of argon plasma and hydrogen plasma, to form the corn center of silicon nanometer ring; the in PECVD system, periodically using hydrogen diluted silane gas (SiH4+H2) and hydrogen gas (H2) to grow and etch the silicon at corn center, to form the silicon quamtum annular nanometer structure; processing surface pretreatment on silicon substrate to form the corn center with nanometer annular structure, while its density is 1-3*108 / cm2. And when grows and etches silicon, in each period, it uses hydrogen diluted silane to grow the corn center, and uses pure hydrogen gas to etch silicon, repeats the deposit and etch periods for 5-50 times.

The invention relates to the technical field of composite photocatalysis, in particular to a NiCoP-g-C3N4 / CdS composite photocatalyst as well as a preparation method and application thereof. The method comprises the steps of firstly, preparing pure CdS through a solvothermal method, and preparing g-C3N4 by directly calcining urea, wherein the g-C3N4 and the CdS have proper valence band and conduction band structures; preparing a g-C3N4 / CdS heterojunction through a chemical adsorption and self-assembly method; then adding a nickel source, a cobalt source and a phosphorus source into ultrapure water according to the mass ratio of 1: 1: 5; after the mixture is fully stirred and dissolved, adding a prepared g-C3N4 / CdS composite material, carrying out uniform ultrasonic treatment, completely evaporating moisture to dryness, and finally, calcining to successfully load granular NiCoP on the surface of the g-C3N4 / CdS heterojunction. The color of the composite material is related to the doping amount of NiCoP, the color of the composite material is gradually darkened from grass green along with the increase of the doping amount of NiCoP, the prepared composite photocatalyst is applied to a hydrogen evolution experiment, the hydrogen evolution performance is excellent, the hydrogen evolution rate is more than 23 times that of pure CdS, the repeated utilization rate is high, and the composite photocatalyst has a wide application prospect in the field of photocatalysis.

The invention discloses a preparing method of a carbon cloth material loaded with antimony pentoxide in different shapes and application of the carbon cloth material in a sodium-ion battery negative electrode. The method comprises the steps of cleaning a carbon cloth to remove surface impurities, then conducting anodic oxidation, and conducting drying after washing; adding antimony trichloride into absolute ethyl alcohol to obtain an antimony trichloride solution; gradually adding a sodium hydroxide solution into the antimony trichloride solution, conducting stirring until a turbid liquid is generated, putting the carbon cloth after anodic oxidation into the turbid liquid to be soaked, and afterwards, taking out the carbon cloth and drying the carbon cloth; adding a strong alkaline solution into the turbid liquid after soaking of the carbon cloth to adjust the pH and obtain a mixed liquid, and putting the dried carbon cloth into the mixed liquid to be impregnated; transferring the mixed liquid and the carbon cloth into a reaction kettle for a hydrothermal reaction, and then cooling to the room temperature; taking out the carbon cloth, and cleaning and drying the carbon cloth to obtain the carbon cloth loaded with antimony pentoxide in different shapes as the sodium-ion battery negative electrode material. The preparing method is simple in process, short time is consumed, and antimony pentoxide in different shapes is controllably generated on the carbon cloth.

The invention discloses a preparation method of hollow cerium oxide, and belongs to the technical field of preparation of rare earth materials. The preparation method includes the steps of mixing an additive with water according to the mass ratio of (1 to 3) to (1 to 5), adding a treating agent 0.1 to 0.3 times of the additive in mass, and performing stirring and mixing to obtain an additive mixture; mixing the additive mixture with urease according to the mass ratio of (10 to 1) to (30 to 1), adding sodium borohydride 0.01 to 0.05 times of the additive mixture in mass, and performing stirringand mixing; adding a sulfuric acid solution 0.1 to 0.2 times of the additive mixture in mass, and performing stirring, mixing, filtering and drying to obtain a semi-finished cerium oxide product; calcinating the semi-finished cerium oxide product to obtain the hollow cerium oxide. The hollow cerium oxide prepared by the preparation method has the advantages of high dispersibility and less proneness to agglomeration, thereby having a broad prospect in the development of the technological industry of rare earth material preparation.

The invention discloses a nitrogen-doped graphyne riveted transition metal single-atom catalyst and its preparation method and application. The catalyst is doped with nitrogen atoms in a new type of carbon material graphyne carrier, and the transition metal single atom is combined with N , The covalent interaction between C atoms is riveted on the surface of nitrogen-doped graphyne, so that the transition metal is uniformly dispersed on the surface of nitrogen-doped graphyne in the form of single atoms. In the catalyst of the present invention, the transition metal atoms are evenly dispersed on the surface of the nitrogen-graphyne-based catalyst in the state of a single atom, providing a large number of active sites for redox reactions, and using graphyne as the carbon substrate has excellent morphology characteristics. It is beneficial to the formation of catalytic active sites and to exert the catalytic advantages of single atoms. The catalyst of the invention has high electrocatalytic activity for oxygen reduction under alkaline conditions, simple and effective preparation process, low cost, easy promotion and production, and has great significance in the field of fuel cell development and application.

The invention discloses a compounding formula of a nano aluminum oxide powder surface modifier. The nano aluminum oxide powder surface modifier comprises polyethylene glycol PEG-6000 and sodium dodecyl benzene sulfonate SDBS, and the molar fractions of the polyethylene glycol PEG-6000 and the sodium dodecyl benzene sulfonate SDBS in a monomolecular adsorption layer are the same, wherein the interaction parameter of the polyethylene glycol PEG-6000 and the sodium dodecyl benzene sulfonate SDBS in the monomolecular adsorption layer is in a range of 2.72-2.77, and the micelle concentration of thesodium dodecyl benzene sulfonate SDBS is 0.0012 mol / L. The two surfactants are used in combination, and morphology features of the surface modifier can be effectively improved by utilizing the advantages of the two surfactants. According to the compounding formula of the surface modifier, an adding and capacity increasing effect is achieved, namely a synergistic effect is achieved, so that performance of the mixed compound is more than performance of single use, the length-diameter ratio and dispersity of the surface modifier can be improved, and morphology characteristics of the surface modifier can be effectively improved.