544results about "Copper oxides/halides" patented technology

The invention discloses a preparation method of a metal-based nano-enzyme and application of the metal-based nano-enzyme in treatment of periodontitis, the nano-enzyme combines two metal bases, and the nano-enzyme exerts anti-inflammatory, vascularization and osteogenesis effects through advantage complementation to treat periodontitis. The nano-enzyme for treating periodontitis has excellent anti-oxidation / anti-inflammatory performance, exerts an ROS elimination function in a specific environment, responds to a periodontitis pathology microenvironment to release metal ions, exerts a growth factor-like function of the metal ions and realizes repair of blood vessels and bone tissues. The multifunctional nano material has the advantages of simple process, low cost, high activity and the like, and has a good treatment effect on periodontitis.

The invention relates to the field of gas sensors, and discloses a hydrogen sulfide gas sensor and a method for detecting the concentration of hydrogen sulfide in gas. The hydrogen sulfide gas sensor comprises a substrate and a gas sensitive material, a cavity is formed in the substrate, the gas-sensitive material is located above the cavity, and the two ends of the gas-sensitive material are connected with the gold electrodes on the substrate; the gas sensitive material comprises graphene fiber and metal oxide loaded on the graphene fiber. The metal oxide is selected from one or more than two of oxides of Zn, Cd, Cu, Ni, Pd, Pt, Co, Ir, Fe, Mn, Cr, Mo, W, V, Ti, Mg and Al; the specific surface area of the gas sensitive material is 80-150m < 2 > / g; the loading capacity of the metal oxide is 0.05 to 5 weight percent. The hydrogen sulfide gas sensor can be self-heated, has high sensitivity to hydrogen sulfide gas, and is suitable for being applied to the field of gas monitoring.

The invention belongs to the field of resource regeneration, and particularly relates to a method for separating and recycling copper, indium, gallium and selenium from a waste solar thin film battery. According to the method, the waste solar thin film cells are subjected to oxidizing roasting, deep eutectic leaching and extraction and reverse extraction, and high-quality conversion and purification of all valuable elements in the waste solar thin film cells to oxides of the valuable elements are achieved. According to the method, the process route is simple, high-selectivity extraction of indium is achieved through the synergistic effect of the deep eutectic solvent and P204, and meanwhile effective recovery of valuable elements such as copper and selenium is achieved. The recovered and prepared oxide can be widely applied to strategic emerging industries such as semiconductors, photovoltaics, aerospace, military and the like.

The invention discloses a copper oxide-based photo-thermal conversion material, a preparation method and application thereof, and belongs to the technical field of photo-thermal materials.According to the method, a copper oxide microflower / carbon nano tube photo-thermal conversion material is synthesized through a microwave hydrothermal method, microflowers are formed by mutually supporting ordered nanosheets, and carbon nano tubes are wound on the nanosheets; the refraction and reflection times of incident light in the material can be increased by utilizing a light trap formed by the staggered micro-nano hierarchical structure, so that multiple absorption of sunlight is effectively promoted, and light capture is increased. Meanwhile, through the synergistic photo-thermal effect of the metal oxide semiconductor / carbon-based composite material, the evaporation rate and the light absorptivity can be improved. In addition, the composite photo-thermal material is applied to a 3D nested structure solar driving interface steam system, and continuous and efficient seawater desalination is achieved.

A nanocomposite having ionic conductivity and having the general formula CuO·MgAl2O4 wherein: copper oxide (CuO) is present in an amount of from about 5 to about 15 weight percent (wt. %) of the total weight of the nanocomposite; and, CuO is present as a monoclinic crystal phase within the nanocomposite, as determined by X-ray diffraction (XRD).

The invention discloses a method for preparing an iridescent cuprous oxide nanoparticle photonic crystal, which is characterized in that monodisperse spherical particles are obtained through a method for controlling the crystal form of cuprous oxide nanoparticles, so that the monodisperse spherical particles can be self-assembled into a three-dimensional ordered photonic crystal structure, thereby generating gorgeous iridescent color. The invention relates to a method for preparing iridescent cuprous oxide nanoparticle photonic crystals, which adopts monodisperse spherical cuprous oxide nanoparticles with a polycrystalline structure as a structural unit, and is synthesized by the following steps: 1) dissolving high-molecular-weight polyvinylpyrrolidone, trisodium citrate and soluble bivalent copper salt in a mixed solvent of polyethylene glycol and water; stirring until the materials are completely dissolved; (2) dropwise adding a strong alkali solution into the solution prepared in the step (1), vigorously stirring, quickly adding a reducing agent, and stopping after the reaction is completed under stirring; and 3) separating a reaction product, washing and drying in vacuum.

The invention relates to a method and a system for preparing a battery metal oxide precursor through nitrate spray pyrolysis. The method comprises the following steps: preparing a metal nitrate mixed solution; atomizing and spraying the metal nitrate mixed solution into a reaction furnace, and performing pyrolysis through different heating temperature zones in the reaction furnace to obtain a metal oxide mixture and high-temperature flue gas; the high-temperature flue gas is subjected to waste heat recovery treatment and then enters a regeneration device to be recovered, and regenerated nitric acid is obtained; the metal oxide mixture is subjected to secondary heating at the bottom of the reaction furnace. The metal oxide precursor is prepared through spray pyrolysis, and compared with a traditional coprecipitation calcination process, the method is more economical and lower in operation cost; and different heating temperature zones are adopted for pyrolysis, so that the application range is wider, and the device can be suitable for metal nitrate at different pyrolysis temperatures.

The invention belongs to the technical field of photoelectric catalytic materials, and particularly relates to an experimental method for rapidly preparing a copper oxide nanowire and application of the copper oxide nanowire. The preparation method comprises the following steps: adopting a copper net as a substrate, rapidly preparing a Cu (OH) 2 nanowire array on the surface of the copper net through a constant-voltage anodic oxidation method, rapidly dehydrating Cu (OH) 2 through high-temperature heat treatment, and preparing the CuxO nanowire array in situ. Compared with the existing P-type semiconductor material, the material has a wider visible light absorption range as a photoelectric catalytic material, and has better performance in the fields of hydrogen production through photoelectric water decomposition and photo-assisted Li-CO2 batteries. The problem of low light energy utilization rate is solved, and the copper oxide nanowire material is beneficial to separation of photo-induced electrons and hole pairs, so that the charge-discharge voltage close to a theoretical value can be measured when the copper oxide nanowire material is used as the positive electrode material of the Li-CO2 battery.

The invention discloses an efficient and stable ozone normal temperature decomposition copper oxide catalyst and a preparation method thereof, and belongs to the technical field of catalyst preparation and environmental protection, the preparation method of the copper oxide catalyst comprises the following steps: (1) adding a copper salt into an alcohol solvent, and stirring until the copper salt is completely dissolved to obtain a precursor solution; (2) dropwise adding the precursor solution into a stirred strong alkali solution, and completely dropwise adding to obtain black slurry; and (3) directly carrying out aging treatment on the black slurry, or continuously stirring the black slurry and then carrying out aging treatment, then carrying out suction filtration, washing for several times, and drying to obtain the efficient and stable ozone normal-temperature decomposition copper oxide catalyst. According to the method, raw materials are easy to obtain, preparation conditions are mild, large-scale preparation is easy, and the prepared copper oxide catalyst is good in environmental adaptability, capable of rapidly achieving high-humidity and high-airspeed ozone decomposition, high in activity, stable and good in reusability.

The invention provides a preparation method of a nanometer copper oxide sheet, and relates to the technical field of metal powder nanometer material preparation. The method comprises the following steps: preparing a copper salt into a copper precursor aqueous solution containing a surfactant, and preparing alkali into an alkaline solution; the copper precursor aqueous solution containing the surfactant is converted into copper micro-nano aerosol containing the surfactant, and the alkaline solution is converted into micro-nano aerosol containing alkali; the preparation method comprises the following steps: carrying out gas-phase confinement microcell mixing pre-reaction on the copper micro-nano aerosol containing the surfactant and the alkali-containing micro-nano aerosol to obtain a copper-alkali mixed solution, transferring the copper-alkali mixed solution into a polytetrafluoroethylene reaction kettle, and carrying out hydrothermal reaction to obtain a nano-particle solution containing a copper compound; and carrying out solid-liquid separation, washing, drying and roasting on the nano-particle solution containing the copper compound to obtain the nano copper oxide sheet. According to the invention, on the basis of improving the preparation efficiency of the nanometer copper oxide sheet, the preparation cost of the nanometer copper oxide sheet is reduced.

The invention provides a method for preparing active copper oxide by recycling ammonia and carbon. The method comprises the following steps: step 1, preparing a copper dissolving reagent from ammonia water and carbon dioxide; 2, the copper raw material and a copper dissolving reagent are mixed, oxygen or air is introduced, heating and pressurizing are carried out for an ammonia leaching complexing reaction, and a copper ammonia complex is obtained; step 3, after the copper ammonia complex is filtered, rectifying to remove ammonia and carbon, producing ammonia gas and carbon dioxide at the tower top, and producing basic cupric carbonate slurry at the tower kettle; 4, centrifuging and drying the basic cupric carbonate slurry to obtain a basic cupric carbonate solid; and 5, calcining the basic cupric carbonate solid at high temperature to produce active copper oxide. According to the active copper oxide preparation method capable of recycling ammonia and carbon, the active copper oxide with high purity and uniform particle size can be directly prepared.

The invention provides a preparation method of coralline copper oxide powder, a preparation method of coralline copper powder, the coralline copper oxide powder and the coralline copper powder, and relates to the technical field of powder materials. The preparation method of the coralline copper oxide powder comprises the following steps: preparing a copper salt aqueous solution and a precipitant aqueous solution; converting the copper salt aqueous solution into copper salt aerosol, converting the precipitant aqueous solution into precipitant aerosol, and mixing the copper salt aerosol and the precipitant aerosol for gas-liquid phase reaction to obtain a suspension containing a copper compound; carrying out homogeneous hydrothermal reaction on the suspension to obtain a reacted solid substance so as to obtain copper precursor powder; and roasting the copper precursor powder to obtain the coralline copper oxide powder. The preparation cost of the coralline copper oxide powder and the copper powder can be reduced.

The invention discloses a preparation method and application of octahedral cuprous oxide containing defects, and belongs to the technical field of material preparation. In order to solve the problems that in existing cuprous oxide preparation, a defect structure is difficult to accurately regulate and control, and the crystal form uniformity is insufficient, the method comprises the steps that a copper source solution, a glucose solution, a sodium citrate solution and an ammonium fluoride solution with specific concentrations are mixed according to the volume ratio, the pH is adjusted to 10.5-11, then a hydrothermal reaction is conducted, and a target product is obtained through centrifugation, filtration, washing and drying. The method comprises the following specific steps: mixing solutions, reacting in a high-pressure reaction kettle at 140-165 DEG C for 4-6 hours, and realizing octahedral crystal form construction and defect regulation and control by controlling the raw material ratio and reaction conditions. The preparation method is simple in process and high in controllability, and the prepared octahedral cuprous oxide containing defects can serve as a catalyst to be applied to the fields of catalytic decomposition of ammonium perchlorate and the like and has good industrial application prospects.

The invention belongs to the technical field of hepatopathy treatment drugs, and particularly relates to an anti-inflammatory and anti-oxidative stress nano-enzyme Cu5.4O atCNDs with cascade enzyme activity and application of the nano-enzyme Cu5.4O atCNDs. The nano-enzyme Cu5.4O-coated CNDs is prepared by the following steps: dissolving CuCl2 in a carbon dot aqueous solution, reacting for 10-12 minutes at the temperature of 75-80 DEG C, then adding an L-ascorbic acid aqueous solution, regulating the pH value to 7.0-8.0 by using a NaOH solution, reacting for 10-12 hours at the temperature of 75-80 DEG C, after the reaction is finished, centrifuging to remove precipitates, dialyzing supernate, and freeze-drying to obtain the Cu5.4O-coated CNDs. Research results of the invention prove that the nano-enzyme Cu5.4O-coated CNDs has the potential of treating various acute liver injury diseases, and is an intervention strategy with a good clinical application prospect.

The invention discloses a surface oxidation monatomic nano-alloy catalyst as well as a preparation method and application thereof, and belongs to the technical field of advanced nano-energy materials and electro-catalysis. A surface-oxidized monatomic nano-alloy catalyst comprises a hydroxylated carbon nanotube carrier and bimetallic nano-alloy particles loaded on the hydroxylated carbon nanotube carrier, in the bimetallic nano-alloy particles, non-noble metal elements are dispersed in noble metal nano-particles in a monatomic form, the size of the bimetallic nano-alloy particles is 3-4 nm, and the surface-oxidized monatomic nano-alloy catalyst is prepared from a surface-oxidized monatomic nano-alloy catalyst. An oxide layer with the thickness of 0.3-0.6 nm is arranged on the surface of the bimetallic nano-alloy particle; the loading amount of the noble metal is 5-15wt%. Ruthenium and other non-noble metal elements are alloyed and anchored on the carbon material substrate, the conductivity of the catalyst can be greatly improved, the size of alloy particles is accurately controlled within the range of 3-4 nm, active sites can be exposed to the maximum extent, and structural stability is considered.

The invention provides a preparation method of spherical copper oxide powder, a preparation method of spherical copper powder, the spherical copper oxide powder and the spherical copper powder, and relates to the technical field of powder materials. The preparation method of the spherical copper oxide powder comprises the following steps: preparing a copper salt aqueous solution and a weak base aqueous solution; wherein the copper salt aqueous solution contains a dispersing agent; converting the copper salt aqueous solution into copper salt aerosol, and adding the copper salt aerosol into a weak base aqueous solution to obtain a suspension containing a copper compound; performing homogeneous hydrothermal reaction on the suspension containing the copper compound to obtain a copper precursor suspension; and carrying out solid-liquid separation on the copper precursor suspension, and drying the obtained solid substance to obtain the spherical copper oxide powder. The preparation cost of the spherical copper oxide powder and the copper powder can be reduced.

The invention discloses a cuprous oxide / carbon nitride composite material and a preparation method and application, and belongs to the field of materials.The preparation method comprises the steps that carbon nitride quantum dots are added into a copper salt solution, and walnut-like cuprous oxide / carbon nitride composite particles with cuprous oxide as a main body and carbon nitride monodispersed on the surface of cuprous oxide are obtained through a liquid phase reduction method. The sensing electrode constructed by taking the cuprous oxide / carbon nitride composite material synthesized by the invention as a catalytic medium is high in glucose detection sensitivity and low in detection limit, has excellent performance in the aspect of glucose detection, and also has good photoelectric synergy capability, so that the sensing electrode has better glucose sensing performance. Therefore, the method has huge application potential in the field requiring rapid quantification of glucose.

The invention discloses a solid oxide electrolytic tank for high-temperature electrolysis of carbon dioxide and a preparation method. The electrolytic tank comprises a solid electrolyte substrate, an isolation layer located on one side of the solid electrolyte substrate, a cathode located on the isolation layer and an anode located on the other side of the solid electrolyte substrate. And the material of the solid electrolyte substrate is La < 0.9 > Sr < 0.1 > Ga < 0.8 > Mg < 0.2 > O < 3 > (LSGM). And the material of the isolating layer is Ce < 0.8 > Sm < 0.2 > O < 1.9 > (SDC). The cathode material is a compound composed of Sr2Fe1. 5Mo0. 5O6 (SFM) and Ce0. 8Sm0. 2O1. 9 (SDC), and La0. 8Sr0. 2Cr0. 5Mn0. 5O3 (LSCM) nano particles or CuO nano particles are attached to the cathode material. The anode material is a compound composed of La < 0.7 > Sr < 0.3 > Co < 0.2 > Fe < 0.8 > O < 3 > (LSCF) and Ce < 0.8 > Sm < 0.2 > O < 1.9 > (SDC). The nanoparticles can effectively increase the specific surface area of an electrode, generate additional active sites, provide enough reaction interfaces and gas diffusion channels, effectively promote the reduction reaction of CO2, and contribute to reducing the local carbon concentration and reducing the occurrence rate of carbon deposition.

The invention relates to a copper-cobalt modified photocathode and preparation thereof and application of the copper-cobalt modified photocathode in photoelectrocatalysis of urea synthesis, and belongs to the technical field of electrode materials, a copper-cobalt double-monatomic coating layer is constructed on the surface of a Cu2O nanorod, the copper-cobalt modified photocathode material Cu2O coated Cu1Co1 / NC is prepared, the corrosion resistance of the Cu2O photocathode is improved, and meanwhile, the photocathode material Cu2O coated Cu1Co1 / NC can be applied to photoelectrocatalysis of urea synthesis. And the double active centers are also utilized to improve the efficiency of preparing urea by catalyzing CO2 / NO3 <-> reduction by the Cu2O photocathode.

The invention belongs to the technical field of nano material preparation, and provides a preparation method and application of a rare earth ytterbium-doped copper oxide nano material. The method comprises the following steps: dissolving rare earth ytterbium salt, copper salt and a surfactant in a solvent, and uniformly stirring; dissolving an organic ligand in a solvent; stirring and mixing the two solutions, transferring into a reaction kettle, and carrying out hydrothermal reaction; and centrifugally washing the obtained product with ethanol, and drying to obtain the rare earth ytterbium doped metal organic precursor nano material. And placing the obtained nano material in a muffle furnace for high-temperature calcination to obtain the rare earth ytterbium doped copper oxide material. The preparation method provided by the invention is simple, green, pollution-free and high in practical degree, and the obtained rare earth ytterbium-doped copper oxide nano material can be used as a catalyst for synthesizing ammonia by electrolytic nitrate reduction, and shows that the rare earth ytterbium-doped copper oxide nano material has relatively high ammonia yield and Faraday efficiency for synthesizing ammonia by nitrate reduction.

The invention discloses a difunctional electrocatalyst for carbon dioxide reduction and PET plastic oxidation and a preparation method and application of the difunctional electrocatalyst, and belongs to the field of application of electrocatalytic materials. The preparation method comprises the following steps: precipitating copper chloride and sodium hydroxide to obtain a precursor of copper hydroxide, and freeze-drying, washing and drying the precursor. The problem that the voltage required by the anode reaction is large when carbon dioxide is electrolyzed is solved. And meanwhile, the material has the advantages of excellent negative and positive electrode bifunctional activity and simultaneous generation of chemicals with high added value at the two electrodes, and has certain commercial application value. Meanwhile, the preparation method is simple, and technical feasibility is provided for large-scale preparation of fine chemicals through carbon dioxide reduction.

The invention relates to the technical field of electrode materials, in particular to a CuO-coated PVDF electrode material and a preparation method and application thereof.The preparation method comprises the following steps that a waste solar photovoltaic back plate is smashed and hydrolyzed under the alkaline condition, a polyethylene glycol terephthalate layer on the surface of the photovoltaic back plate reacts with alkali to generate ethylene glycol and terephthalic acid salt, and then a CuO-coated PVDF electrode material is obtained; pVDF in the photovoltaic backboard is separated in a precipitation form, and PVDF is prepared; the preparation method comprises the following steps: dissolving a cupric salt and a cationic surfactant in water, carrying out a co-precipitation reaction at room temperature in an alkaline environment to generate a nano Cu (OH) 2 precipitate, and drying and decomposing to obtain a CuO precursor; cuO, PVDF, acetylene black and an organic solvent are mixed and stirred, in the stirring process, the surface of CuO is coated with PVDF in situ, acetylene black is evenly distributed, and the CuO-coated PVDF electrode material with CuO nanoparticles as an inner core, PVDF as a shell and acetylene black evenly distributed is formed.

The invention relates to the technical field of hydrometallurgy, in particular to a method for selectively separating calcium sulfate in a complex reaction system. The method comprises the following steps: adding a soluble sulfate solution and a precipitant solution into a base solution in a parallel flow manner, and reacting to obtain mixed slurry containing fibrous calcium sulfate; and separating the mixed slurry containing fibrous calcium sulfate to obtain fibrous calcium sulfate crystals, metal hydroxides and purified liquid. According to the method, on the basis of wastewater treatment through a traditional precipitation method, fibrous calcium sulfate is separated from other substances in a complex system by controlling growth of calcium sulfate crystals, the environmental influence caused by solid waste is reduced while the industrial wastewater containing sulfate radicals is treated at low cost, and finally resourceful treatment of the industrial wastewater is achieved.

The invention relates to a method for preparing copper oxide from PCB (printed circuit board) acidic waste etching liquid, in particular to the field of secondary utilization of waste etching liquid, and the method comprises the following steps: performing electrodialysis on the PCB acidic waste etching liquid to obtain recycled acid and low-acid waste etching liquid; the method comprises the following steps: mixing the low-acid etching waste liquid with alkali liquor, carrying out a neutralization decomposition reaction, and carrying out solid-liquid separation to obtain a copper oxide product; the operating temperature of electrodialysis is less than or equal to 35 DEG C. According to the method provided by the invention, the waste liquid is subjected to electrodialysis, most hydrochloric acid in the waste liquid is transferred to the concentration chamber of the electrodialysis equipment, the acidity of the waste liquid is reduced, the dosage of sodium hydroxide in the subsequent neutralization process can be reduced, and meanwhile, the hydrochloric acid solution of the cathode is used as a byproduct and can be reused for etching a production line and neutralizing the prepared copper oxide later; the copper plating solution can be sold as a product or applied to a circuit board copper plating process, so that high-efficiency and low-cost recycling of the copper element is realized.

The invention relates to a non-noble metal-based paired electro-catalysis method for producing formic acid by coupling cathode dehalogenation with anode formaldehyde oxidation, which realizes efficient dehalogenation removal of pollutants and generation of high-value products. The Co-CuxO nanowire electrode with excellent catalytic performance is synthesized through a simple method and serves as a cathode and an anode at the same time, and the purpose that the cathode removes halogenated pollutants and the anode oxidizes formaldehyde to produce formic acid at the same time is achieved. Co-CuxO promotes generation of H *, the performance of electroreduction dehalogenation is improved, and the removal rate of trichloroacetic acid can reach 92.1% or above. And moreover, the reaction energy barrier is reduced, the selectivity of formic acid generated by oxidizing anode formaldehyde is improved, and the formic acid selectivity and Faraday efficiency can reach 100%. A paired electro-catalysis system shows extremely stable and outstanding electro-catalysis performance in the aspect of converting wastes into value-added products, and the problems of poor anode utilization rate and high energy consumption in the current electro-catalysis dehalogenation reaction are solved.

The invention relates to the technical field of synthesis of electrochemical materials, in particular to an electrocatalyst of magnesium-doped copper oxide nanospheres and a preparation method and application of the electrocatalyst, and the electrocatalyst is prepared through a one-step hydrothermal method and is of a nanosphere structure with a uniform microstructure. According to the catalyst, in a wide voltage range from-1.277 V vs.RHE to-1.677 V vs.RHE, relatively high Faraday efficiency of electrochemical reduction of carbon dioxide into C2 + chemicals is realized. In addition, the technology is green and environment-friendly, the raw materials used in the technology are cheap, the preparation process is simple, the energy consumption is low, a new thought is provided for preparation of the electrocatalyst for generating high-added-value products, and the method has a good application prospect.

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 provides a PVP-doped Cu-Mg binary metal electro-catalytic material and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving copper chloride, polyvinylpyrrolidone and magnesium chloride in N, N-dimethylformamide to obtain a mixed solution; the molar ratio of the copper chloride to the magnesium chloride is 1: (0.98-1.02); and under the condition of ice-water bath, stirring the mixed solution, introducing protective gas, dropwise adding a sodium borohydride solution, generating a precipitate, separating, washing, and drying to obtain the PVP-doped Cu-Mg binary metal electro-catalytic material. By doping magnesium, controlling the doping amount of magnesium and combining PVP, the valence state of generated Cu < + > is effectively regulated and controlled, the selectivity of a C2 product is improved, meanwhile, the PVP coating the outer layer protects Cu < + > from being oxidized into Cu < 2 + >, and the stability of the material is effectively improved.

A method and system for converting copper cyanide to copper oxide is provided. The method includes contacting a copper cyanide solution with an acidic solution in a precipitation tank under reaction conditions sufficient to produce a copper cyanide slurry, removing the copper cyanide slurry from the precipitation tank, separating solid copper cyanide from the copper cyanide slurry in a first separation device, removing the solid copper cyanide from the first separation device, contacting the solid copper cyanide with a sodium hydroxide solution in a production tank under reaction conditions sufficient to produce a copper oxide slurry, removing the copper oxide slurry from the production tank, separating solid copper oxide from the copper oxide slurry in a second separation device, and removing from the second separation device any residual sodium hydroxide not reacted during the process of contacting the solid copper cyanide with the sodium hydroxide solution in the production tank.

The invention belongs to the technical field of biological detection, and relates to a flower-shaped cuprous oxide-based SERS (Surface Enhanced Raman Scattering) biosensor and a method for establishing a tumor cell / leukocyte classification model based on the same. The flower-shaped Cu2O is successfully prepared by regulating and controlling the characteristic parameters, the raw material ratio and the like of polyvinylpyrrolidone in the preparation process, and the cuprous oxide-based SERS biosensor prepared from the flower-shaped Cu2O and precious metal has excellent SERS stability and sensitivity. The cuprous oxide-based SERS biosensor provided by the invention can be combined with tumor cells and leukocytes without any marker to obtain Raman spectrum data of different cells, a tumor cell / leukocyte classification model is established through data processing, and marker-free identification and judgment of tumor cells / leukocytes are realized.