551 results about "Copper nitrate" patented technology

The invention relates to a preparation method of an amino-functionalized metal organic framework material and application of the prepared material to separation of CO2 / N2 and CO2 / CH4. The preparation method comprises the following steps: dissolving adenine and copper nitrate trihydrate in N, N '-dimethylacetamide to obtain a first mixed solution; dissolving carboxylic acid and potassium carbonate in deionized water to obtain a second mixed solution; and adding the second mixed solution into the first mixed solution, carrying out stirring reaction, and carrying out vacuum drying on an obtained solid product to obtain the amino-functionalized metal organic framework material. The amino-functionalized metal organic framework material prepared by the invention has high CO2 adsorption selectivity and adsorption capacity, and also has good acid-resistant, alkali-resistant and water-resistant stability. The amino-functionalized metal organic framework material prepared by the preparation method disclosed by the invention is applied to industrial CO2 adsorption separation and has an excellent separation effect.

The invention discloses a copper-based nano-enzyme, a preparation method thereof and application of the copper-based nano-enzyme in organophosphorus pesticide detection, and belongs to the technical field of pesticide residue detection. The copper-based nano-enzyme has a netted-like structure, a high specific surface area and many active sites, the valence state of a copper element is zero-valence Cu, Cu < + > and Cu < 2 + >, the copper-based nano-enzyme has high peroxidase-like activity and laccase-like activity, the detection limit is low, and glyphosate can be sensitively detected; and glyphosate, glufosinate-ammonium and isazofos can be well distinguished from six organophosphorus pesticides with medium concentration, and the method has high selectivity. The nano enzyme provided by the invention is prepared from ammonium citrate and copper nitrate in an N, N-dimethylformamide (DMF) solution by using a solvothermal method; the preparation process of the nano enzyme is simple.

The invention discloses a preparation method and application of amino-modified single-benzene-ring copper-based MOFs (metal organic frameworks), and the method comprises the following steps: dropwise adding a copper nitrate monohydrate solution into a diamino terephthalic acid solution, fully stirring to react, and centrifugally washing and drying the product to obtain the amino-modified single-benzene-ring copper-based MOFs. The amino-modified single-benzene-ring copper-based MOFs are used for electrocatalytic reduction of carbon dioxide. The prepared amino-modified single-benzene-ring copper-based MOFs have unique morphology, active sites can be exposed on the inner surface and the outer surface, the accessibility of the active sites is improved, and meanwhile the reaction mass transfer capacity is enhanced.

The invention discloses a method for catalytically oxidizing lignin to depolymerize into an aviation oil intermediate by using a cellulose carbon aerogel supported copper nano-catalyst. Comprising the following steps: (1) dissolving cellulose powder into a mixed alkali solution of NaOH and urea, and stirring at low temperature to obtain a clear and transparent cellulose solution; and washing to be neutral to obtain well dispersed cellulose suspension. And (2) carrying out suction filtration molding, and freeze-drying for a period of time to obtain the cellulose aerogel. And (3) immersing in an ethanol solution of copper nitrate for ultrasonic treatment, and drying in a vacuum drying oven. And (4) carrying out high-temperature calcination in an N2 atmosphere to obtain a catalyst which is marked as Cu / CA. And (5) the catalyst can efficiently catalyze a Fenton-like reaction to oxidize a dimer model compound of lignin in acidic, neutral and alkaline environments to obtain products including benzoic acid, acetophenone, benzyl alcohol, phenol and the like, the required hydrogen peroxide concentration is low, and the catalyst has the advantages of simple process, high catalytic activity, low cost and the like, can be used for effectively degrading lignin to prepare aviation oil intermediates, and has wide application prospects. And repeated cyclic utilization is realized.

The invention relates to a high-barrier antibacterial polylactic acid packaging material and a preparation method thereof, and belongs to the technical field of biodegradable packaging materials. The technical problems that a traditional polylactic acid material is insufficient in barrier property, poor in antibacterial performance and difficult to meet the packaging requirements of livestock and poultry meat, food and medicine are solved. A graphene oxide lamellar material is subjected to copper ion functionalization treatment and is bridged with tannic acid molecules through copper ions to form a nano filler, and then the filler is blended with a plasticized polylactic acid solution to prepare the membrane. The preparation method comprises the following steps: preparing a copper ion functionalized dispersion liquid from graphene oxide and copper nitrate, self-assembling the copper ion functionalized dispersion liquid and tannic acid under the condition that the pH is 8-10 to generate a nanofiller, uniformly dispersing the nanofiller, mixing the nanofiller with polylactic acid, polyethylene glycol and glycerol according to a specific mass ratio, coating to form a film, and controlling solvent volatilization conditions to obtain the high-performance packaging material. According to the method, the oxygen barrier property and the antibacterial activity of the material are remarkably improved through uniform dispersion of the nanofiller and reinforcement of a coordination network. The obtained material is suitable for packaging foods such as livestock and poultry meat.

The invention discloses a CCTO dielectric ceramic, and belongs to the technical field of dielectric ceramic synthesis. Calcium nitrate tetrahydrate, copper nitrate trihydrate, tetrabutyl titanate and niobium oxalate hydrate are used as raw materials, a precursor solution is prepared according to the molar ratio of calcium to copper to titanium to niobium being 1: 3: 4-x: x, the PH is adjusted, colloid obtained after aging is dried and ground, then high-temperature sintering is conducted in a muffle furnace, tabletting is conducted after the colloid is mixed with an adhesive, annealing is conducted, and finally the high-density, good-uniformity and high-temperature-resistant titanium-titanium alloy is obtained. And the single-doped CaCu3Ti (4-x) NbxO12 ceramic sample has the advantages of low dielectric loss and high dielectric constant.

The invention belongs to the technical field of chemical analysis and detection, and relates to a method for rapidly detecting sodium ions in cigarette paper by nano-enzyme laccase. According to the method, 2-aminoterephthalic acid, copper nitrate and cerous nitrate are taken as precursors, polyvinylpyrrolidone is taken as a stabilizer, and a solvothermal method is adopted to synthesize the copper-cerium-containing MOF-based nano-enzyme with laccase-like activity, namely Cu / Ce-BDC-NH2 nano-enzyme; cu / Ce-BDC-NH2 nano-enzyme oxidizes 2, 4-dichlorophenol and 4-aminoantipyrine to obtain a red product, the potassium pyroantimonate ligand is adsorbed on the surface of Cu / Ce-BDC-NH2 to inhibit catalytic action, so that laccase-like activity is reduced, Na < + > is introduced to react with potassium pyroantimonate to generate a stable complex, the activity of Cu / Ce-BDC-NH2 laccase is recovered, and the red color of a solution is deepened. The invention establishes a novel colorimetric rapid detection method for sodium ions.

The invention discloses a high-sulfur-tolerance SCR honeycomb denitration catalyst and a preparation method thereof, and belongs to the technical field of industrial catalysts.The preparation method comprises the steps that S1, anatase type TiO2 and NH4HCO3 are mixed for pulping, pre-drying and calcination are conducted after extrusion forming, and a green body is formed; s2, carrying out nitric acid treatment on the green body, dipping the green body in a mixed solution of copper nitrate hydrate and cerium nitrate hydrate, and carrying out vacuum dipping, microwave drying and two-stage calcination to obtain a desulfurization carrier; s3, depositing an ammonium metatungstate precursor on the surface of the desulfurization carrier through CVD, and calcining to form a WO3 transition layer; and S4, dipping the transition layer in an acid solution containing NH4VO3 and ammonium metatungstate, and calcining after ultrasonic treatment to obtain a finished product. According to the method, the pore structure of the carrier is optimized through chambering treatment, and the stability and denitration efficiency of the catalyst in high-sulfur flue gas are remarkably improved by combining a multistage sulfur-resistant mechanism that the desulfurization layer preferentially captures SO2, the WO3 transition layer obstructs sulfur penetration and the denitration layer is protected by active sites.

The invention discloses a silver-based tin oxide electric contact material and a preparation method thereof, and relates to the technical field of electric contact materials. When the silver-based tin oxide electric contact material is prepared, firstly, a high-temperature solid-phase method is used for doping lithium and cerium to prepare doped tin oxide powder; stannic chloride and copper nitrate are prepared into a fiber membrane through electrostatic spinning, meanwhile, titanium dioxide is grown in situ through nano spraying, and doped stannic oxide fibers are prepared after calcination; the doped tin oxide powder, doped tin oxide fibers and silver powder are subjected to high-energy ball milling and powder mixing and then annealed, and silver-based tin oxide composite powder is obtained; the silver-based tin oxide composite powder is subjected to pre-pressing forming and then subjected to vacuum discharge plasma sintering, and the silver-based tin oxide electric contact material is prepared. The prepared silver-based tin oxide electric contact material has the advantages of being low in resistivity, high in fusion welding resistance, good in arc erosion resistance and easy to machine and shape.

The invention relates to the technical field of thermite, in particular to a thermite system of an ultralow condensed phase combustion product and a preparation method of the thermite system. The preparation method of the aluminothermic system comprises the following steps: S1, synthesizing nanoscale BiF3 particles; s2, immersing a mixed oxidizing agent into a copper nitrate solution, dropwise adding ammonia water into a system, reacting for a period of time, standing and aging the reaction system, performing centrifugal separation, washing, and performing vacuum freeze drying to obtain BiF3-coated TACN core-shell structure particles; and S3, adding the acid-activated nano aluminum powder and the BiF3-coated TACN core-shell structure particles into an n-hexane medium, carrying out ultrasonic treatment, and drying to obtain thermite powder. Through the high reaction interface of the nano-scale bismuth-based fluoride and the activation strategy of the high-energy gas production compound on the interface, the output of ultralow condensed phase combustion products and the efficient release of system energy are realized.

The invention discloses a zeolite / silver / copper ternary inorganic nano antibacterial and antiviral material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a mixed solution of a template agent and an anchoring agent, loading a metal precursor, adding a silicon source, performing hydrothermal crystallization and performing post-treatment. According to the zeolite / silver / copper ternary inorganic nano antibacterial and antiviral material disclosed by the invention, Ag-Cu bimetallic nanoparticles are formed by introducing copper nitrate and silver together, so that the catalytic activity, selectivity and stability of the zeolite / silver / copper ternary inorganic nano antibacterial and antiviral material are remarkably enhanced, and the dosage of noble metal silver can be reduced.

The invention discloses a catalyst for preparing trichlorosilane and a catalytic preparation method of trichlorosilane. The catalyst is prepared from the following components in percentage by mass: weighed copper nitrate, zinc nitrate, aluminum nitrate, lanthanum nitrate and the balance of a carrier, the preparation method comprises the following specific steps: S1, filling a catalyst; S2, purifying raw material gas; S3, reacting; and S4, separating and purifying a product, namely discharging a reacted gas product from an outlet of a reactor, and condensing through a condenser. In the prepared catalyst, the activity and selectivity of the catalyst are remarkably improved through the synergistic effect of the copper-zinc-aluminum composite oxide and the rare earth element lanthanum, the electronic structure and the surface acid-base property of the catalyst can be adjusted through doping of lanthanum, the reaction of silicon powder and hydrogen chloride is promoted, meanwhile, side reactions are inhibited, and the service life of the catalyst is prolonged. And the yield of trichlorosilane is improved.

The invention belongs to the technical field of iron ion detection, and particularly relates to a rapid detection method for ferric ions in water, which comprises the following steps: a fluorescent probe preparation step: taking trihydrate of copper nitrate and tryptamine, adding into a centrifuge tube in sequence, adding ultrapure water, performing ultrasonic dissolution, transferring into a high-pressure reaction kettle, and performing hydrothermal reaction to obtain a fluorescent probe; cooling to room temperature, centrifuging the obtained yellow green solution in a centrifugal machine, and filtering the supernate through a microfiltration membrane to obtain a copper-doped carbon quantum dot CuCDs stock solution, namely the fluorescent probe; analyzing and determining Fe < 3 + >: taking the diluent of the prepared CuCDs solution, adding the diluent into a centrifugal tube containing a Fe < 3 + > standard solution, uniformly mixing, carrying out fluorescent quantitative analysis and detection, and exploring the change rule of the fluorescence intensity ratio of CuCDs; according to the rapid detection method for Fe < 3 + > provided by the invention, the synthesized CuCDs have high sensitivity, can realize on-site rapid detection of Fe < 3 + > in a water medium, and shows a wide application prospect in the field of environmental monitoring.

The invention discloses a carbon microsphere coated CuTCPP efficient nano lubricating additive with a core-shell structure as well as a preparation method and application thereof, and relates to the technical field of nano materials. The method comprises the following steps: by taking glucose as a raw material and oxalic acid as a catalyst, carrying out hydrothermal reaction to prepare nano carbon microspheres; dissolving copper nitrate trihydrate in N, N-dimethylformamide, adding the nano carbon microspheres, and stirring in a water bath to obtain a suspension A; dissolving meso-tetra (4-carboxyphenyl) porphin in N, N-dimethylformamide to obtain a solution B, and uniformly dispersing the solution B in the suspension A to obtain a suspension C; and pouring the suspension C into a polytetrafluoroethylene reaction kettle, and carrying out hydrothermal reaction to obtain the carbon microsphere coated CuTCPP efficient nano lubricating additive. The prepared carbon microsphere coated CuTCPP composite nano lubricating additive has the advantages of being good in lubricating effect and simple in preparation process, and compared with base oil, the average friction coefficient is reduced by 57.5%, and the wear rate is reduced by 46.6%.

The invention relates to the technical field of polymer waste treatment, and discloses a composite curing agent for curing chlorine and sulfur in polymer waste microwave thermal conversion and a preparation method and application thereof, and the method comprises the following steps: dissolving calcium nitrate and aluminum nitrate in deionized water to form an active component I solution; dissolving at least one of zinc nitrate, copper nitrate, ferric nitrate, manganese nitrate and cerium nitrate as an active component II in the active component I solution, adding citric acid into the formed mixed solution to form gel, and drying to obtain an active matter; and mixing the active matter, silicon carbide and bentonite, ball-milling, extruding and granulating, and calcining to obtain the composite curing agent. The composite curing agent disclosed by the invention can efficiently recover pyrolytic carbon, pyrolytic oil and pyrolytic gas while effectively and synergistically curing chlorine and sulfur pollution elements in situ; the curing rate of the chlorine / sulfur element can reach 80%, the recovery rate of the composite curing agent can reach 98%, and meanwhile, the raw material cost is low, and the problems of secondary pollution and equipment corrosion are avoided.

The invention discloses a NiCu-based alloy catalyst for preparing high-value products through natural gas decarbonization and application of the NiCu-based alloy catalyst, and belongs to the technical field of natural gas high-value catalytic conversion. The preparation method of the NiCu-based alloy catalyst comprises the following steps: (1) adding nickel nitrate hexahydrate and urea into hot water, adding ethylene glycol, carrying out a stirring reaction at 120-150 DEG C, and calcining the obtained intermediate to obtain a nickel oxide precursor; (2) adding a copper nitrate aqueous solution and ammonia water into the nickel oxide precursor, so that copper ions are anchored on the surface of nickel oxide, drying and calcining to obtain a Ni-Cu alloy oxide precursor; and (3) adding the Ni-Cu alloy oxide precursor, bismuth trioxide and metallic tin into deionized water, adding a complexing agent, carrying out ultrasonic treatment, and carrying out H2 reduction calcination on the obtained precipitate to obtain the Ni < x > Cu < y > Bi < z > Snm alloy. The NiCu-based alloy catalyst is used in a natural gas decarburization high-value product preparation reaction, and the natural gas decarburization reaction is sufficient, and long-term efficient conversion and stable operation are achieved by combining the synergistic effect of ultrasonic waves and an alternating magnetic field.

The present invention discloses a nano copper-based catalyst, its preparation method, and its application in the electrocatalytic reduction of carbon dioxide and carbon monoxide. Copper chloride (or copper nitrate, copper acetate) is dissolved in ultrapure water, and a sodium borohydride solution is added dropwise. Stir at room temperature for 5-60 min, filter, and dry to obtain a nano copper catalyst. Further, through a displacement reaction, nano copper-palladium and copper-silver catalysts are obtained. The present invention is applied to the electrocatalytic reduction of carbon monoxide. In a membrane electrode assembly (MEA) electrolyzer, the Faraday efficiency of multi-carbon products (C2+) reaches up to 95%, the partial current density reaches up to 3 A cm-2, and the overall electrolyzer energy efficiency reaches up to 39%. It can stably electrolyze for 30 hours at 1 A cm-2. This nano copper catalyst is applied to the electrocatalytic reduction of carbon dioxide. In an MEA electrolyzer, the Faraday efficiency of C2+ reaches up to 66%, and the partial current density reaches up to 331 mA cm-2.

The invention relates to application of a non-noble metal catalyst Cu-ZnO / TiO2 in catalytic synthesis of N, N '-dicyclohexyl p-phenylenediamine in a heterogeneous system, and belongs to the technical field of catalyst preparation and application. According to the catalyst, zinc nitrate hexahydrate serves as a zinc source, copper nitrate trihydrate serves as a copper source, P25 type titanium dioxide serves as a carrier, metal is loaded on titanium dioxide through a fractional precipitation method, the titanium dioxide is put into a tubular furnace for hydrogen reduction, a catalyst Cu-ZnO / TiO2 is obtained, then the catalyst Cu-ZnO / TiO2 is dispersed in a solvent, and the novel rubber anti-aging agent N, N-dimethylformamide is synthesized by catalyzing a photo-thermal reduction amination reaction of p-phenylenediamine and cyclohexanone. The catalyst is N, N '-dicyclohexyl p-phenylenediamine. Wherein the Cu-ZnO / TiO2 catalyst with the content of copper being 7% and the content of zinc oxide being 4% has excellent catalytic performance, the conversion rate of p-phenylenediamine reaches 100% and the selectivity of N, N '-dicyclohexyl p-phenylenediamine reaches 99.9% when the hydrogen pressure is 6 MPa, the temperature is 200 DEG C and the reaction is performed for 10 h. The preparation method is simple, low in cost and high in catalytic selectivity, and has a wide industrialization prospect.

The invention belongs to the technical field of semiconductor material detection, and particularly relates to a method for representing micro-defects of a near-perfect czochralski silicon wafer by regulating and controlling near-surface copper concentration. The invention discloses a method for representing micro-defects of a near-perfect czochralski silicon wafer by regulating and controlling the concentration of near-surface copper. The method specifically comprises the following steps: (S.1) cleaning the silicon wafer and immersing the silicon wafer into a copper nitrate solution for standing; (S.2) rinsing the silicon wafer with ionized water, taking out the silicon wafer and airing the silicon wafer; (S.3) performing high-temperature heat treatment on the silicon wafer for a period of time, and quickly cooling; (S.4) carrying out chemical polishing on the cooled silicon wafer; (S.5) horizontally placing the silicon wafer in the corrosive liquid; and (S.6) observing the surface of the silicon wafer by using an optical microscope or a scanning electron microscope so as to display the microdefects. According to the invention, copper precipitates at different depths are observed after copper is introduced at high temperature, so that the microdefect condition of the silicon wafer can be reflected. The method can clearly display the micro-defects in the nearly perfect czochralski silicon wafer, and has high detection efficiency and accuracy. The method is easy to operate, low in cost and suitable for silicon wafer microdefect detection in large-scale production.

The invention belongs to the technical field of semiconductor oxide gas sensors, and particularly relates to an rGO / CuO / Li sensitive material, a preparation method thereof and application of the rGO / CuO / Li sensitive material in H2S sensors. The preparation method comprises the following steps: firstly, preparing a graphene oxide nanosheet by using an improved Hummers method, and then preparing the rGO / CuO / Li sensitive material by using copper nitrate, lithium chloride and the prepared graphene oxide nanosheet as raw materials, polyvinylpyrrolidone as a surfactant and N, N-dimethylformamide as a solvent by using a one-step solvothermal method. Under the condition of room temperature, the sensitive material shows a relatively high response value (220.1) and a relatively low detection lower limit (1ppb) on hydrogen sulfide, has good selectivity, repeatability and stability, and has a wide application prospect in trace-level hydrogen sulfide detection in the fields of industrial safety and atmosphere detection.

The invention discloses a preparation method and application of a metal covalent organic framework material, and the prepared metal covalent organic framework material can be used for adsorption separation of elemental iodine pollutants and shows excellent iodine adsorption capacity and rate. According to the preparation method, 1H-pyrazole-4-formaldehyde and copper nitrate trihydrate are subjected to a solvothermal reaction to prepare a copper ion ring trinuclear metal complex with an aldehyde group, and the copper ion ring trinuclear metal complex and 1, 3, 5-tri (4-aminophenyl) benzene are further subjected to a Schiff base reaction to prepare the metal covalent organic framework material containing copper ions. According to the metal covalent organic framework material disclosed by the invention, copper ion active adsorption sites in a chemical structure are also retained while a developed microporous structure is maintained, and the interaction strength of pore channels to iodine is remarkably enhanced, so that the iodine adsorption rate and capacity are remarkably improved. The preparation method is simple, convenient, universal and high in controllability, and large-scale production and manufacturing of the metal covalent organic framework adsorption material can be achieved.

The invention provides a preparation method of 7N ultrahigh-purity copper, which comprises the following steps: taking 4N copper as an anode, placing the anode in a diaphragm bag, taking a first titanium plate as a cathode, taking a copper nitrate solution as an electrolyte, and carrying out pre-electrolysis; and after the pre-electrolysis is finished, a second titanium plate serves as a cathode, electrolyte circulating electrolysis is conducted, the section of the second titanium plate is in a trapezoid shape, the long edge of the trapezoid is close to the bottom of the electrolytic bath, and the 7N ultra-high-purity copper is obtained after electrolysis is finished. According to the preparation method provided by the invention, the overall purity of the electrolytic copper product obtained at the cathode can reach 7N or above, the purity and the component uniformity of the ultra-high-purity copper product are improved, and the problems of non-uniform copper purity and low yield caused by the fact that the purity of copper close to the bottom of an electrolytic bath in an existing electrolysis method does not reach the standard are solved; the yield of ultra-high pure copper products is improved to 100%, the material utilization rate and the production capacity are improved, and the product cost is reduced.

The invention belongs to the field of coal chemical industry purification, and particularly relates to an ultrahigh-precision conversion absorption type dechlorination purifying agent and a preparation method thereof. Wherein the dechlorination purifying agent is prepared from the following components in percentage by weight: 5%-30% of Fe2O3, 1%-10% of CuO, 10%-30% of ZrO2, 20%-40% of Al2O3, 10%-20% of ZnO and the balance of auxiliaries. The preparation method comprises the following steps: preparing ferric nitrate, copper nitrate, zirconium nitrate, aluminum nitrate and zinc nitrate into a solution, carrying out co-precipitation by using alkali liquor as a precipitator, washing, drying and calcining the obtained material to obtain a precursor, dipping the precursor powder with ammonium dihydrogen phosphate or phosphoric acid, drying and calcining, and carrying out compression molding. The dechlorination purifying agent can reduce the total amount of organic chlorine and inorganic chlorine in raw gas such as raw coke oven gas, coke oven gas, natural gas and gaseous hydrocarbon to 0.01 ppm or below, has the capacity of converting and absorbing organic chlorine, and meanwhile has extremely high dechlorination precision.

The invention discloses a flame-retardant cotton fiber and a preparation method thereof, and relates to the field of cotton fibers. When the flame-retardant cotton fiber is prepared, dicarboxyl phenyl porphyrin and copper nitrate react to prepare a metal organic framework nanosheet; the preparation method comprises the following steps: reacting 2, 4, 6-tri (4-formyl phenyl)-1, 3, 5-triazine, 2-aminomethyl piperazine and phosphorous acid to prepare a flame-retardant graft; the cotton balls, the metal organic framework nanosheets and the flame-retardant graft react to prepare pre-modified cotton fibers; and carrying out ring-opening reaction on the pre-modified cotton fiber and epoxy chloropropane, and then carrying out ring-closing to obtain the flame-retardant cotton fiber. The flame-retardant cotton fiber prepared by the invention has excellent antibacterial property, flame retardance, color fixation and dispersity.

The present invention discloses a preparation method and application of a PtCu-TCP composite photocatalyst, which belongs to the field of photocatalysts. Hexahydrated chloroplatinic acid, trihydrated copper nitrate and a tris-olefin porous polymer (TCP) ethylene glycol dispersion are added to a two-necked flask and heated to 170-180°C for 4 hours. After the reaction is completed, the black precipitate is collected by centrifugation, washed and dried to obtain a PtCu-TCP composite photocatalyst. The preparation process of the composite photocatalyst is simple and the conditions are easy to control. According to structural characterization and performance characterization experiments, it can be found that the prepared PtCu-TCP composite photocatalyst has the advantages of stable chemical properties and high catalytic efficiency, and has high catalytic activity and stability in seawater; and because it has the advantages of easy availability of raw materials and low preparation cost, it has certain research and application value.

The invention discloses a preparation method and application of a mesoporous anti-perovskite structure electrocatalyst for producing formate through electrooxidation of glucose, and belongs to the technical field of catalysts. The preparation method of the catalyst comprises the following steps: (1) dispersing Kit-6, copper nitrate and nickel nitrate in a mixed solution to obtain a solution 1; (2) incubating the solution 1 in a drying oven, and evaporating to dryness to obtain a powder precursor 1; (3) transferring the powder precursor 1 into a muffle furnace, and calcining to obtain a powder precursor 2; (4) adding the powder precursor 2 into sodium hydroxide, etching in a drying oven, washing and drying to obtain a powder precursor 3; and (5) transferring the powder precursor 3 into a tubular furnace, and calcining in an NH3 atmosphere to obtain the mesoporous anti-perovskite structure electrocatalyst. The catalyst prepared by the invention uses non-noble metal, so that the synthesis cost is reduced; the preparation process is simple. The catalyst is applied to production of formate through electrooxidation of glucose, and has the advantages of high catalytic stability, high formate yield and the like.

The invention provides a preparation method of ultrahigh-purity copper. The preparation method comprises the following steps: providing a first anode, a first cathode and an electrolyte; the electrolyte comprises the following components: a purified copper salt solution, inorganic acid, an oxidizing agent and an additive, the purified copper salt solution comprises purified copper salt and water, the purified copper salt comprises copper sulfate and copper nitrate, and the molar ratio of nitrate to sulfate in the purified copper salt solution is (1.5-9): 1; the additive comprises any one or a combination of at least two of an alcohol compound, polyacrylamide or a tetrazole compound; and the first cathode and the first anode are immersed in the electrolyte for electrochemical deposition, and the ultra-high-purity copper is obtained. The electrolyte composed of the purified copper salt solution, the inorganic acid, the oxidizing agent and the additive is adopted, the proportion of nitrate radicals to sulfate radicals in the purified copper salt solution is controlled, the impurity content of the sulfur element and the silver element in the electrolyte can be controlled, and preparation of the ultra-pure electrolytic copper is achieved.

The application discloses a preparation method of mesoporous copper oxide and application thereof. The preparation method comprises the following steps: S1, preparing a hydroxyl copper nitrate microplate by taking calcium carbonate paper as a substrate and copper nitrate as a solvent; S2, synthesizing an ordered copper hydroxide nanowire assembly through an alkali solution reaction; and S3, performing annealing treatment in a muffle furnace to obtain the mesoporous copper oxide microplate. Under the conditions of no hard template, no soft template and no strong acid treatment, the application provides a method for synthesizing the mesoporous copper oxide microplate material with uniform pore structure on the carbonic paper by adopting copper nitrate hydrolysis, alkali etching and annealing, and the synthesis method of the mesoporous structure has the advantages of simple operation, good controllability and low cost. The application also relates to application of the mesoporous copper oxide as an electrocatalyst material in the field of glucose electrochemical sensing.

The invention relates to an electrochemical sensor for detecting xanthine, the electrochemical sensor is a three-electrode system, a working electrode of the electrochemical sensor is prepared by preparing a modification solution from Cu-BTC-HHTP-HCG and dispensing the modification solution on the surface of a glassy carbon electrode, and the Cu-BTC-HHTP-HCG is synthesized from copper nitrate trihydrate, 1, 3, 5-benzene tricarboxylic acid, 2, 3, 6, 7, 10, 11-hexahydroxy triphenylene hydrate and high-conductivity graphene. According to the electrochemical sensor for xanthine detection, Cu-BTC-HHTP has high electrocatalytic activity, specific surface area and porosity, the enrichment efficiency and electron transfer capability of xanthine can be effectively improved, meanwhile, the conductivity and stability of the electrochemical sensor can be further enhanced through compounding of high-conductivity graphene, and the electrochemical sensor can be applied to xanthine detection. Therefore, the electrochemical sensor is endowed with excellent electrochemical response performance. The electrochemical sensor is high in sensitivity, low in detection limit, good in stability and interference resistance and suitable for detecting xanthine in actual fish and shrimp products.

The invention relates to the technical field of supercapacitors, and particularly discloses a spherical hollow multi-layer high-entropy metal oxide and a preparation method and application thereof. The spherical hollow multi-layer high-entropy metal oxide is prepared by the following steps: cross-linking metal cation nitrate comprising iron nitrate nonahydrate, zinc nitrate hexahydrate, copper nitrate hexahydrate, cobalt nitrate hexahydrate and nickel nitrate hexahydrate with dextrose monohydrate to generate spherical high-entropy metal hydroxide FeZnCuCoNi-HO with a solid core structure, and annealing to induce the metal hydroxide. And the spherical hollow multi-layer high-entropy metal oxide is formed. Compared with the prior art, the high-entropy metal oxide is prepared through a low-energy-consumption and simple synthesis method, the problem of volume change of the high-entropy metal oxide serving as an electrode material in the circulation process is solved, more reaction active sites are provided, an ion diffusion path is improved, and the specific capacitance of the composite material is improved while the specific capacitance of the composite material is improved. And the stability of the material is maintained, so that the energy storage performance of the supercapacitor is improved.