19 results about "Ceric ammonium nitrate" patented technology

Provided are a metal-organic framework nanomaterial, a preparation method therefor, and a use thereof, belonging to the technical field of bionanomaterials, and resolving the technical problem of inhibiting atherosclerosis using biomimetic metal-organic framework nanoenzymes. The solution is: the components of the of the metal-organic framework nanomaterial and the ratio thereof are: metal ions Ce4+ and a ligand fumaric acid in a molar ratio of 1:5. The preparation method therefor is: measuring an FA regulator and water to prepare a mixed solution, then adding fumaric acid and cerium ammonium nitrate dropwise into the mixed solution, stirring at room temperature, centrifuging, repeatedly washing alternately with water and ethanol, and finally drying overnight in a vacuum oven. A simple, efficient and convenient method for synthesizing the metal-organic framework nanomaterial is provided. The synthesized metal-organic framework nanomaterial has excellent CEH-like enzyme activity and intrinsic antioxidant activity, and can be used to increase lipid efflux and reduce lipid uptake, and decrease ox-LDL-induced foam cell formation, thereby alleviating atherosclerosis.

The invention relates to the technical field of silicon carbide ceramic materials, and particularly discloses a preparation method of high-performance silicon carbide granulation powder. The method comprises the following steps: S1, preparing a composite adhesive system; s2, pre-dispersing the slurry; s3, ball milling dispersion; s4, mixing and size mixing; s5, spray drying; and S6, low-temperature activation. The adhesive is a ceric ammonium nitrate-ascorbic acid-dicyandiamide composite catalytic oxidation system, in the low-temperature activation stage, high-activity Ce < 3 + > generated by reaction of ceric ammonium nitrate and ascorbic acid efficiently catalyzes and cuts off polyvinyl alcohol molecular chains and promotes thorough decomposition of the polyvinyl alcohol molecular chains, dicyandiamide is decomposed to release gas to form a micro-channel, and a local atmosphere is created; the carbon residual rate is remarkably reduced to 0.06% or below, the apparent density is larger than or equal to 0.85 g / cm < 3 >, the porosity of a sintered body is smaller than or equal to 0.7%, and the technical problems of residual carbon control and uniform forming are solved.

The invention provides a cerium-based metal organic framework as well as a preparation method and application thereof, the cerium-based metal organic framework is obtained by uniformly mixing a cerium salt solution and a regulator, then carrying out a primary microwave heating reaction, then adding a ligand, carrying out a secondary microwave heating reaction, and then washing and drying, the cerium salt is ceric ammonium nitrate, and the ligand is cerium nitrate. The ligand is terephthalic acid, and the regulator is acetic acid. According to the method, the UiO-66 (Ce) with bionic Lewis acid sites is designed through microwave-assisted heating and by utilizing acetic acid to regulate the local chemical environment of the UiO-66 (Ce), so that the activity of hydrolase is greatly improved, a large number of oxygen vacancies can be induced, the activity of oxidase is improved, efficient degradation of glyphosate is realized, and the method has a wide application prospect in the aspects of glyphosate hydrolysis and detection.

The application provides a synthesis method of active piperidone alkaloid, and the active piperidone alkaloid is Dysidone A. The raw material piperidine is used as a substrate, and the substrate is reacted with p-methoxy benzyl chloride under the condition of N,N-diisopropylethylamine, so that the secondary amine is protected, and the side reaction of sodium hydride and hydrogen on the secondary amine is avoided. Then, the secondary amine is oxidized under the condition of iodine and iodobenzenediacetic acid. Next, the secondary amine is reacted with triethyl phosphine acetic acid ester to obtain an alpha, beta unsaturated ester. Then, the p-methoxy benzyl protection is removed by using ammonium cerium nitrate in a mild and efficient manner. Finally, the ester is reduced into an alcohol by using diisobutylaluminum hydride. The piperidone alkaloid or the like is obtained through five reaction steps. The synthesis process is simple, the raw material is cheap and easy to obtain, the cost is low, the reaction condition is relatively mild, the purity is high, and the method has good economic and social benefits.

This invention discloses a cerium-doped diatom-based silicon-carbon anode material, its preparation method, and its application, belonging to the technical field of lithium battery anode materials and their preparation. Using a diatom shell as a framework, a bio-doping method is employed. When the diatoms grow to the early logarithmic phase in a culture medium, cerium ammonium nitrate is added to the diatom culture medium for co-cultivation. The co-cultivated diatom shells are then calcined at high temperature to obtain the cerium-doped diatom-based silicon-carbon anode material. This invention employs a two-stage cultivation strategy, introducing cerium ammonium nitrate after the diatoms have reached the early logarithmic phase to avoid toxic inhibition during the growth-sensitive period. Simultaneously, it utilizes the efficient absorption and doping capabilities of diatoms during the active biomineralization phase, achieving a balance between high doping efficiency and structural integrity. This method utilizes the biomineralization capabilities of diatoms to achieve uniform elemental doping, resulting in a simple, low-cost, and environmentally friendly process; providing a new approach for the development of high-performance silicon-carbon anode materials.

The invention discloses a copper-titanium etching solution, and relates to the technical field of microelectronic device manufacturing, and the copper-titanium etching solution comprises the following components by mass: 4.5-8.5% of ammonium persulfate; 1.5%-3.5% of urea peroxide; 1.0% to 2.0% of 1-hydroxybenzotriazole-5-carboxylic acid; 0.3% to 0.9% of 2-mercapto benzimidazole; 0.5% to 1.5% of sulfobutyl ether-beta-cyclodextrin; 0.8%-2.2% of L-aspartic acid-N, N-diacetic acid; 0.1% to 0.7% of iso-tridecanol polyoxyethylene ether; 0.05%-0.15% of ceric ammonium nitrate; 0.02% to 0.08% of sodium polyacrylate; and the balance of deionized water. According to the method, the matching problem of the etching rate is solved, the stability is improved, and substrate corrosion is avoided.

The invention provides a preparation method and application of a mesoporous material Ce / Ti-UiO-66-NH2, and the preparation method comprises the following steps: 1) mixing a certain amount of template agent, ceric ammonium nitrate, terephthalic acid, TMB, acetic acid and sodium perchlorate, dissolving in deionized water, and reacting to obtain Ce-UiO-66; (2) adding a certain amount of tetrabutyl titanate into a N, N-dimethylformamide solution containing Ce-UiO-66, and carrying out hydrothermal reaction, so as to obtain a Ce / Ti-UiO-66 solid; and (3) carrying out ultrasonic treatment on a certain amount of 2-aminoterephthalic acid and the Ce / Ti-UiO-66 solid in a methanol solution to obtain a Ce / Ti-UiO-66-NH2 solid. According to the method, simple and convenient synthesis of mesoporous Ce-UiO-66 can be achieved, the problem that in the prior art, a mesoporous Ce-UiO-66 synthesis method is difficult is solved, the metal titanium ion-doped and amino-loaded Ce / Ti-UiO-66-NH2 mesoporous material is prepared, and meanwhile, a new material is provided for the fields of photocatalysis and the like.

A preparation method of a rare earth-containing heterojunction catalyst material CeO2 / Sm-MOF comprises the following steps: mixing and dissolving samarium nitrate hexahydrate and H4TBAPy in a composite solvent to form a mixed solution, carrying out a hydrothermal reaction to obtain Sm-MOF, mixing and dissolving ceric ammonium nitrate and Sm-MOF in an aqueous solution of gamma-valerolactone, then adding H2O2 and triethanolamine to form a mixed solution, carrying out magnetic stirring at 45-55 DEG C for 2-3 h, and carrying out hydrothermal reaction to obtain the rare earth-containing heterojunction catalyst material CeO2 / Sm-MOF. And then carrying out hydrothermal reaction and roasting treatment. The thermal stability of Sm-MOF is improved, ceric ammonium nitrate is adopted as a Ce source, a two-step heat treatment process is combined, the binding force and distribution uniformity of CeO2 on the surface of Sm-MOF are effectively improved, the catalytic activity and cycle stability of CeO2 / Sm-MOF are improved, and the Sm-MOF / CeO2 composite material has excellent degradation efficiency on MB, RhB, ATZ, CIP and the like and has excellent cycle stability in the cycle process.

The invention belongs to the field of marine antifouling, and particularly relates to a composite material (CeO2-MOF / C) with halogenated peroxide mimic enzyme catalytic activity and preparation and application thereof. The specific method comprises the following steps: adding activated carbon black into a CeO2-MOF precursor, and calcining an obtained sample in a muffle furnace at 350 DEG C for 2 hours to prepare a CeO2-MOF / C composite material; wherein the precursor of the CeO2-MOF is 4, 4-diphenyldicarboxylic acid and ceric ammonium nitrate; the mass ratio of the precursor 4, 4-diphenyldicarboxylic acid to the ceric ammonium nitrate is 1: (1-1.5). The antifouling coating is constructed on the basis of cerium-based halogenated peroxide bionic enzyme, the prepared antifouling coating is used for antifouling application in real sea environments, and the real sea environments comprise a sea total immersion zone and a tidal range zone. The antifouling coating has no pollution to the marine environment, is green and environment-friendly, and has a wide application prospect in marine fouling protection.

This invention belongs to the field of anti-corrosion coating technology and discloses a thin-layer high-barrier heavy-duty anti-corrosion coating and its preparation method. The coating comprises component A and component B, wherein component A is composed of fluorocarbon-polyurethane hybrid resin, glass flakes, cerium-doped carbon nitride, additives, and solvent, and component B is a curing agent and a diluent. The fluorocarbon-polyurethane hybrid resin is prepared by reacting fluorocarbon resin with a mixed isocyanate, which is a compound of aliphatic and aromatic isocyanates; the cerium-doped carbon nitride is obtained by calcining urea followed by secondary calcination with cerium ammonium nitrate. This invention, through resin hybrid design and synergistic use of functional fillers, achieves excellent acid and alkali corrosion resistance and long-term barrier effect under thin-layer conditions. The coating maintains surface integrity and stable adhesion even after immersion in corrosive media, and is easy to apply and low in cost, making it suitable for steel structure protection in harsh corrosive environments.

The invention discloses a selective etching solution for metal molybdenum, which comprises the following components in percentage by mass: 7%-15% of electronic-grade phosphoric acid, 38%-49.5% of electronic-grade acetic acid, 3.0%-5.5% of electronic-grade nitric acid, 15%-25% of acetonitrile, 0.5%-2.0% of ceric ammonium nitrate, 0.5%-3.0% of indium gallium zinc oxide (IGZO) etching inhibitor and the balance of deionized water. When the etching liquid is used for etching operation, on the premise that the etching rate of the IGZO is smaller than or equal to 0.05 nm / min, efficient removal of a metal molybdenum deposition layer can be achieved, no metal molybdenum and oxide residues of the metal molybdenum exist after etching, and etching of the metal molybdenum and the IGZO has a high selection ratio.

The invention belongs to the technical field of nano materials, and particularly relates to a nano cellulose composite material as well as a preparation method and application thereof. The preparation method of the nanofiber composite material comprises the following steps: uniformly mixing carboxylated nanocellulose with an ammonium ceric nitrate aqueous solution, incubating for 10-16 hours while stirring, centrifuging and collecting a precipitate, dispersing the precipitate into an N, N-dimethylformamide solution, and heating for 20-40 minutes at 80-100 DEG C to obtain the nanofiber composite material, according to the carboxylated cellulose prepared by the preparation method disclosed by the invention, antioxidant active ingredients are uniformly distributed on the surface of the carboxylated cellulose, and agglomeration of the carboxylated cellulose in a physiological environment is effectively prevented, so that lasting and stable exertion of the antioxidant activity of the carboxylated cellulose is ensured; therefore, the invention provides application of carboxylated cellulose in preparation of an antioxidant material.

This invention discloses a rust-proof steel wire and its preparation process, belonging to the field of steel wire post-treatment technology. The rust-proof steel wire comprises a copper-plated steel wire and a passivation layer on the surface of the copper-plated steel wire. The passivation layer is made from a passivation solution, which comprises the following raw materials in the indicated mass fractions: 4-8% vegetable fatty acids, 2-6% boric acid, 1-3% cerium ammonium nitrate, 2-8% polyepoxysuccinic acid terpolymer, 1-3% polyacrylamide, 0.5-2% disodium ethylenediaminetetraacetate, 4-6% aminosilane coupling agent, and the balance being deionized water. The polyepoxysuccinic acid terpolymer contains thiourea molecules in its side chains. The rust-proof steel wire, through the combination of raw materials in the passivation solution, obtains a passivation layer that is a composite of organic and inorganic substances, thereby constructing a dual physical barrier that provides long-term rust protection for the steel wire. Simultaneously, the passivation layer also has a certain coupling effect, which can improve the bonding force between the rust-proof steel wire and the plastic matrix, enhancing the adaptability of the rust-proof steel wire in plastic hoses.

The invention relates to a high-hardness stainless steel band which comprises a stainless steel band body and a high-hardness coating, and the high-hardness coating is formed after the surface of the stainless steel band body is coated with high-hardness paint. The high-hardness coating is prepared from the following components in parts by mass: 150 to 170 parts of resin matrix, 13 to 15 parts of carbon fiber filler, 1.5 to 2.5 parts of dispersing agent, 0.5 to 1 part of defoaming agent, 1 to 2 parts of silane coupling agent and 60 to 70 parts of curing agent, the carbon fiber filler comprises modified carbon fibers and a silicon dioxide component, and the modified carbon fibers comprise ceric ammonium nitrate, sodium alginate and carbon fibers. The surface of the stainless steel band body is coated with the high-hardness coating, so that the hardness and the antibacterial performance of the stainless steel band are improved.

The application relates to the technical field of ultra-high performance concrete, and particularly discloses a sprayable ultra-high performance concrete for high-cold regions, which is prepared from raw materials including premix and activated glass fiber, and the mass ratio of the premix and the activated glass fiber is 220-300:6-12; the raw materials of the premix include, by mass fraction, cement 70-80 parts, silica flour 10-20 parts, fly ash 5-15 parts, coarse sand 70-75 parts, fine sand 33-39 parts, ultra-fine composite powder 10-15 parts, water reducing agent 4-6 parts, quick-setting agent 4-8 parts, microcrystalline cellulose 5-10 parts, methyl methacrylate 1-2 parts, cerium ammonium nitrate 0.01-0.1 part, ethylenediamine 1-2 parts, methyl acrylate 1-2 parts, steel fiber 3-7 parts, graphene oxide 1-2 parts and water 13-17 parts; the activated glass fiber is obtained by treating glass fiber with lye, adding the glass fiber and siloxane into an ethanol aqueous solution and performing heat treatment.

The present application belongs to the technical field of environment-friendly hydrogel slow-release fertilizer, and discloses an environment-friendly humic acid (salt) embedding hydrogel slow-release fertilizer and a preparation method thereof. In a reaction medium of water, original starch, monomer, embedding substance of humic acid or salt, double initiator and crosslinking agent are subjected to graft polymerization reaction in a reaction extruder to obtain the environment-friendly humic acid (salt) embedding hydrogel slow-release fertilizer. The double initiator is cerium ammonium nitrate and persulfate. The monomer is one or more than one of acrylamide and acrylic acid monomer. The preparation method is a reaction extrusion method combined with a double initiation system. The reaction only needs about 10 minutes, the grafting efficiency and polymerization efficiency in the chemical reaction are improved, and it is beneficial to form a complete and dense three-dimensional network structure. The prepared slow-release fertilizer has higher humic acid (salt) loading capacity, higher gel strength and good slow-release performance, and the slow-release period is up to 70 days or more.

A method for preparing a digital ELISA micro‑well array, comprising the steps of: cleaning and drying a quartz glass sheet, and performing a surface treatment; growing a chromium film on the surface of the treated quartz glass sheet substrate; applying a layer of a positive photoresist on the chromium film; performing photolithography by using a mask plate with an array pattern; immersing the sample in a cerium ammonium nitrate solution to etch the chromium film, and cleaning the etched chromium film with deionized water; and then performing reactive ion etching on the cleaned sample. The present invention further relates to a digital ELISA micro‑well array. In the preparation method, the quartz glass is used as a transparent substrate, and the micro‑well array can be illuminated from the back and side of the array to observe the filling of microspheres in the micro‑wells, thereby meeting the multi-directional requirements under different viewing conditions. The resulting micro‑wells have high precision, no edge effect, and uniform etching depth.

The invention discloses a preparation method of special composite modified white carbon black for tires in winter, and belongs to the field of white carbon black, and the preparation method comprises the following steps: S1, taking water and a CTAB (Cetyltrimethyl Ammonium Bromide) aqueous solution as a base solution according to a volume ratio, taking a sulfuric acid solution as an acid solution, and taking a sodium silicate solution as an alkali solution; s2, adding an acid-base solution into the base solution for reaction, and then adding ceric ammonium nitrate; s3 and S4, adjusting the acid-base flow rate, the pH value and the stirring frequency step by step; s5, continuously adding the acid solution to adjust the pH value; s6, the suspension liquid in the step S5 is subjected to washing, solid-liquid separation, pulping and spray drying, the dispersity of the white carbon black is improved through CTAB and cerium oxide added in the reaction stage, meanwhile, the pore structure of the white carbon black is adjusted, the binding capacity of the white carbon black and rubber is promoted, the tire has better road holding force and wet skid resistance in the low-temperature environment, and the service life of the tire is prolonged. And the composition can be used as an antioxidant to prolong the service life of rubber tires.

A method for preparing a rare-earth-containing heterojunction catalyst material CeO2 / Sm-MOF involves dissolving samarium nitrate hexahydrate and H4TBAPy in a composite solvent to form a mixed solution, followed by hydrothermal reaction to obtain Sm-MOF. Cerium ammonium nitrate and Sm-MOF are then dissolved in an aqueous solution of γ-valerolactone, followed by the addition of H2O2 and triethanolamine to form a mixed solution. The mixture is magnetically stirred at 45-55°C for 2-3 hours, followed by hydrothermal reaction and calcination. This invention improves the thermal stability of Sm-MOF by using cerium ammonium nitrate as the Ce source and combining a two-step heat treatment process. This effectively enhances the bonding force and distribution uniformity of CeO2 on the Sm-MOF surface, improving the catalytic activity and cycle stability of CeO2 / Sm-MOF. It exhibits excellent degradation efficiency for MB, RhB, ATZ, CIP, etc., and demonstrates excellent cycle stability during cycling.