32 results about "Cerium acetylacetonate" patented technology

The invention provides a nitrogen oxide degrading film and a preparation method thereof. The degrading film comprises the following main raw materials: cerium acetylacetone, barium acetylacetone, potassium fluoride, melamine and graphene. The preparation method comprises the following steps: preparing F-and-N codoped BaCeO3 from cerium acetylacetone, barium acetylacetone, potassium fluoride and melamine by using a sol-gel process; mixing graphene with the F-and-N codoped BaCeO3 to obtain precursor powder; and carrying out pouring and film forming so as to obtain the nitrogen oxide degrading film. Thus, the nonmetal-modified inorganic degrading film prepared by using the sol-gel process has a more efficient and stable current utilization rate and is applicable to high-selectivity electrocatalytic degradation of nitrogen oxide.

The invention discloses low-carbon and high-cleanness fuel and a preparation method thereof. The fuel is prepared from raw materials in parts by weight as follows: 37-45 parts of methanol, 28-36 parts of diesel, 3-7 parts of tannin, 9-13 parts of cerium acetylacetonate and 2-4 parts of nano-zinc oxide. The preparation method comprises steps as follows: diesel, tannin and cerium acetylacetonate are mixed and are heated and stirred in a sealed manner, and a mixture A is obtained; methanol and nano-zinc oxide are mixed, heated and stirred, and a mixture B is prepared; the mixture A and the mixture B are mixed, heated and ultrasonically processed, and the fuel is prepared. The low-carbon and high-cleanness fuel has a good anticoagulant characteristic, and copper-strip corrosion index is 1. Due to the fact that an oil product contains sufficient oxygen, the fuel is burnt sufficiently, carbon deposition can be effectively reduced, a smoke intensity value is 0.3, purifying rate is 75%, and the fuel has better environmental-friendly performance. According to the low-carbon and high-cleanness fuel and the preparation method thereof, the basic raw materials are widely sourced, few raw materials are adopted, the production process is simple, operation is simple and convenient, production cost is low, and economic benefit and social benefit are remarkable.

The present invention relates to a method for preparing composite oxides mischcrystal jelly glue with gadolinium oxide adulterating cerium oxide. The method has characteristics of including steps as follows: (1) selecting raw material: weighing each raw material by weight part as follows: acetylacetone cerium aqua compound 1.5-2.5, acetylacetone gadolinium aqua compound 0.35-0.45, methanol 20-30,N, N-dimethylformamide 0.3-0.5; (2) mixing in room temperature and stirring 40-60 minutes, obtaining the colloidal solution; (3) gelating the colloidal solution in 45-70 DEG C and dehydrating dealcoholize 8-30 hours; (4) when the colloidal solution becomes viscous, the gelating reaction continues 40-60 minutes for obtaining jelly glue; (5) displacing the jelly glue to a vacuum drying case, vacuumdrying 1-2 hours in 130 DEG C, and obtaining the composite oxides mischcrystal jelly glue with gadolinium oxide adulterating cerium oxide. The product has high denseness and low jelly glue porosity which is benefit for low temperature sintering into a gadolinium oxide adulterating cerium oxide electrolytes film with compact and high density.

Disclosed is a method for preparing a YBa2Cu3O7-x (YBCO) superconducting composite film, comprising mixing and dissolving ytterbium acetate <Y(CH3COO)3>, barium acetate <Ba(CH3COO)2>, and cupric acetate <Cu(CH3COO)2> into a water solution of trifluoroacetic acid according to a molar ratio of Y:Ba:Cu of 1.5:2:3; uniformly stirring, and evaporating the above solvent to dryness in vacuum to acquire a gel; adding methanol, uniformly stirring, and evaporating the resulting solvent to dryness to acquire a gel; adding methanol to prepare a precursor liquid in which the total concentration of the three types of metal ions of Y, Ba, and Cu is 1.5-3.0mol / L; coating the precursor liquid on a substrate; allowing the coated film to undergo a process of low-temperature heat treatment to decompose trifluoroacetate; allowing the coated film to undergo a process of high-temperature heat treatment to acquire a YBCO film having a tetragonal phase; coating a precursor liquid of cerium acetylacetonate on the YBCO film and carrying out a high-temperature heat treatment at a temperature ranged from 1000 DEG C to 1100 DEG C; and coating the precursor of Y, Ba, and Cu and the precursor of cerium acetylacetonate in turn repeatedly and carrying out corresponding heat treatment to acquire the YBCO superconducting film having a five-layer structure of YBCO / CeO2 / YBCO / CeO2 / YBCO with a thickness of 1.5 microns.

The invention relates to barium titanate ceramic with a wide curie temperature region and a preparation method thereof. The preparation method comprises the following steps: 1) dissolving one of cerium-2,4-pentanedionate hydrate, samarium nitrate hexahydrate and europium nitrate hexahydrate into glacial acetic acid together with barium acetate to obtain a barium-source solution; 2) dissolving tetrabutyl titanate into ethylene glycol monomethyl ether to obtain a titanium-source solution; 3) mixing the barium-source solution with the titanium-source solution, aging and drying obtained sol to obtain xerogel and then presintering, balling and drying to obtain barium titanate powder; 4) sequentially granulating, dry pressing and shaping, discharging sol and pressurelessly sintering the barium titanate to obtain barium titanate ceramic. The barium titanate ceramic disclosed by the invention has a wider curie temperature region, can meet design and use requirements of high-temperature ferroelectric devices and further has the advantage of good single phase.

The invention discloses binary material (Zr,Ce)O2 nanodots, and a preparation method and application thereof, belonging to the technical field of high-temperature superconducting materials. The preparation method comprises the following steps: dissolving zirconium acetylacetone and cerium acetylacetone in a zirconium-to-cerium mol ratio of (1-x):x into propanoic acid to obtain a precursor liquid;spreading the precursor liquid onto a monocrystal substrate to obtain a precursor film; in a protective gas atmosphere, sintering the precursor film at 950-1200 DEG C for 10-500 minutes to obtain discontinuous Ce-doped ZrO2 nanodots of which the heights are 5-60nm, the diameters are 20-150nm and the grain density is 10-100 / mu m. A low-fluorine MOD (metal-organic deposition) technique is used for preparing a YBCO (yttrium barium copper oxide) film on a transition layer substrate coated with nanodots to enhance the superconductivity of the YBCO film under the action of an external magnetic field. The shape, number and distribution of the nanodots disclosed by the invention can be effectively controlled in a simple way.

A method for producing the buffer layer of a conductor coated with high temperature superconducting coating by means of macromolecule assisted deposition, which comprises: a. preparing waterless: weigh rare-earth acetate, or rare-earth propoxide, or rare-earth acetylacetonate, or zirconium propoxide, or zirconium n-butoxide and cerium acetylacetonate at an ionic ratio of rare-earth or zirconium: cerium as x:1-x (0.01<=x<=0.5), dissolve the compound in an organic solvent to form a waterless; b. preparing colloid: add polyvinyl butyral, or polyethylene glycol, or polyvinyl pyrrolidone, or polyvinyl alcohol, or polyoxyethylene to the waterless solution to form colloid; c. coating the colloid and drying: coat the colloid on a substrate and then dry the substrate; d. sintering: load the substrate into a sintering oven, heat up to 850-1150 DEG C at 5-100DEG C / min, hold for 0.25-2h, and drop the temperature at 1-2 DEG C / min to room temperature. The method is characterized in simple process, easy operation control, low cost, and free of environment pollution; the single-layer cerium oxide buffer layer obtained can be in critical thickness of 150-200nm.

The invention discloses a preparation method of a magnesium and aluminum doped mesoporous hollow sphere ceria-based oxygen storage material and belongs to the technical field of oxygen storage material preparation. The method includes: weighing sodium silicate and water, dropwise adding hydrochloric acid solution, performing ultrasonic dispersion to obtain dispersion liquid, adding magnesium nitrate solution, aluminium nitrate solution, acetone and acetylacetone cerium, enabling the matters to be loaded to the surface of orthosilicic acid sediment under the action of ammonia water titration, performing calcination under nitrogen atmosphere after dehydration, washing with ethyl alcohol, sodium hydroxide solution and deionized water, and filtering to obtain filter residue prior to activation to prepare the magnesium and aluminum doped mesoporous hollow sphere ceria-based oxygen storage material. The preparation method has the advantages that the preparation steps are simple, specific surface area is increased effectively, and oxygen storage capacity is increased by 22-26%; the obtained produce is of a spatial stereostructure, and under the condition of over 1123K, sintering is avoided, and the oxygen storage capacity and the specific surface area are unchanged.

The invention discloses fuel for a low-carbon and high-cleanness diesel vehicle as well as a preparation method thereof. The fuel consists of the following raw materials in parts by weight: 10 to 20 parts of methanol, 33 to 41 parts of diesel, 5 to 12 parts of sodium formaldehyde sulfoxylate, 11 to 19 parts of itaconic acid, 3 to 7 parts of cerium acetone and 1 to 3 parts of nanometer zinc oxide.The fuel, which is prepared by pretreating diesel by the itaconic acid and the nanometer zinc oxide and then mixing the itaconic acid and the nanometer zinc oxide as well as other raw materials, has excellent anticoagulant characteristic, the copper sheet corrosion index is 1, and the corrosion phenomenon, which is higher than that caused by the diesel for vehicles, on an oil tank, an oil conveying pipe, an oil spraying nozzle and an engine combustion chamber is avoided during use. The oil product contains sufficient oxygen, so that the fuel can be combusted completely, carbon deposition can be effectively reduced, the smoke intensity value is 0.3, the purification rate is 75 percent and more excellent environmental friendliness is achieved. The basic raw materials have diversified sources, the production process is simple and is simple and convenient to operate, the production cost is low, and remarkable economical benefit and social benefit are achieved.

A method for preparing water-soluble ceria nanocrystals belongs to the technical field of nanomaterials. Existing CeO2 nanoparticles include non-surface-modified and oil-soluble CeO2 nanoparticles. The present invention adopts reflux hydrolysis method. The steps are: 1. Synthesis of water-soluble CeO2 nanoparticles dispersed in the solution. A reflux hydrolysis method is adopted, the cerium source is cerium acetylacetonate, and 2-pyrrolidone is used as a solvent and a surface modifier. The technical parameters are: reflux hydrolysis temperature: 225-240°C, reflux time: 60-120min. 2. Separation of water-soluble CeO2 nanoparticles from the solution. The solution containing the water-soluble CeO2 nanoparticles was cooled to room temperature, precipitated with methanol, centrifuged, washed with acetone, and dried. The technical parameters are: the amount of methanol used is 200-300ml, the amount of acetone used is 50-80ml, and dried with N2 flow for 4h or at 50-60°C for 5-10h. The final prepared water-soluble CeO2 nanoparticles have an average particle diameter of about 5nm-10nm and are spherical.