330results about "Copper oxides/halides" patented technology

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 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 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 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 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 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 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 provides a separation and extraction method for valuable metals in electroplating sludge, and belongs to the technical field of solid waste recycling. The electroplating sludge is copper-containing electroplating sludge, and the method comprises the following steps: mixing dehydrated and dried electroplating sludge with an organic acid solid auxiliary agent, carrying out gradient weak reduction pretreatment, cooling, and carrying out magnetic separation to remove iron; adding ammonia water to react, separating solid waste and collecting an ammonia-containing complex solution; adjusting the pH value to 9-10, carrying out distillation deamination at 60-70 DEG C, carrying out gas-solid waste separation, precipitating to obtain a copper hydroxide crude product, and dissolving the nickel element in the residual liquid; adjusting the pH value of the residual liquid to 10-11, carrying out two-stage distillation deamination, and precipitating to obtain a nickel hydroxide crude product; and purifying the copper hydroxide crude product and the nickel hydroxide crude product to obtain a copper hydroxide refined product and a nickel hydroxide refined product. According to the method, the dried electroplating sludge is mixed with the solid organic acid, reduction pretreatment is carried out under the conditions of different atmospheres and different temperatures, the ammonia complexing and graded deamination processes are combined, efficient recovery of copper and nickel is achieved, and the purity of the recovered metal is high.

The invention discloses a copper-based catalyst for preparing propyl alcohol by electrocatalytic reduction of carbon dioxide and application of the copper-based catalyst. The preparation method of the copper-based catalyst comprises the following steps: adding a sodium hydroxide solution into an aqueous solution of a copper compound to obtain a turbid solution; adding a hydroxylamine hydrochloride aqueous solution into the turbid solution, carrying out a reaction, and carrying out centrifugal drying to obtain Cu (OH) 2 / CuO; cu (OH) 2 / CuO is prepared into a working electrode, and then the working electrode is reduced into the Cu / Cu2O nanosheet through an electrochemical reconstruction method. The Cu / Cu2O electrocatalyst with the bicontinuous nano-domain structure is obtained by using a two-step electrochemical reconstruction method, and the Cu / Cu2O electrocatalyst is used as a cathode for electrocatalytic reduction of carbon dioxide. The hydrogen evolution reaction is inhibited in a KOH or KHCO3 aqueous solution system, so that the activity of propyl alcohol preparation is remarkably improved. Experiments show that the Faraday efficiency of propyl alcohol exceeds 12.1% under the current density of 0.84 A cm <-2 >, and the Faraday efficiency of propyl alcohol is good. According to the analysis, the Cu / Cu2O catalyst obtained through the electrochemical reconstruction method serves as the cathode, and the propyl alcohol can be prepared through the carbon dioxide electrocatalytic reduction reaction.

The invention discloses a copper oxide / cuprous oxide heterogeneous nano-material with chiral morphology and a preparation method thereof, and the method comprises the following steps: 1, mixing a copper salt aqueous solution and a surfactant aqueous solution to obtain a mixed solution A, taking a chiral ligand aqueous solution to add into the mixed solution A under a stirring state, and stirring at room temperature to obtain a copper oxide / cuprous oxide heterogeneous nano-material; a copper ion reaction precursor solution is obtained; and 2, adding a sodium hydroxide aqueous solution into the copper ion reaction precursor solution, stirring at room temperature to obtain a mixed solution B, transferring the mixed solution B into a hydrothermal reaction kettle, putting the hydrothermal reaction kettle into a drying oven, reacting at 120-160 DEG C for 2-6 hours, after the reaction is finished, centrifugally separating out a precipitate, and sequentially washing and drying in vacuum to obtain the copper ion catalyst. The copper oxide / cuprous oxide heterogeneous nano material with chiral morphology is obtained. The preparation method is simple, low in cost and easy to implement, and the obtained chiral copper oxide / cuprous oxide heterogeneous nano material has good structural stability and crystallinity.

The invention provides a method for preparing electronic-grade copper oxide by using circuit board acidic etching waste liquid, and belongs to the field of copper resource recovery. The method comprises the following steps: sequentially carrying out impurity removal, concentration crystallization, salt-alkali reaction and cleaning on the circuit board acidic etching waste liquid, and collecting to obtain a copper hydroxide crude product; dissolving and recrystallizing to obtain a copper hydroxide refined product; a carbonized ammonia water solution is added to react with the copper hydroxide refined product, and ammonia cupric carbonate is obtained after adsorption and purification; adding a surfactant and a zinc salt additive, and stirring; drying to obtain modified basic cupric carbonate; carrying out selective etching on the modified basic cupric carbonate by adopting dilute acid to obtain basic cupric carbonate particles; and calcining the basic cupric carbonate particles at 300-500 DEG C to obtain the copper oxide powder with the honeycomb structure. According to the method, on the basis of the basic step of recovering copper resources from the circuit board acidic etching waste liquid, the treatment steps of purification, grain refinement, porous etching and the like are added, so that the purity and the activity performance of a final copper oxide product are improved, and the electronic-grade copper oxide is prepared.

The invention relates to the technical field of negative-electrode-free lithium metal batteries, in particular to a three-dimensional copper-based composite current collector and a preparation method thereof. The preparation method comprises the following steps that pretreated foamy copper is subjected to thermal oxidation treatment, and oxidized foamy copper with a three-dimensional copper-based framework is prepared; the oxidized foamy copper is subjected to electro-deposition treatment, the oxidized foamy copper is modified through a lithium-containing compound, an SEI film containing C, O, F, N and Li is formed on the three-dimensional copper-based framework, and the three-dimensional copper-based composite current collector is prepared. Lithium-loving sites formed in the lithium electrodeposition process can induce lithium metal in-situ nucleation, the chemical stability of a lithium metal negative electrode / electrolyte interface is improved by utilizing electrolyte induction of an in-situ matching battery system and pre-regulation and control of interface components, and meanwhile, an SEI film rich in inorganic components is formed, so that growth of lithium dendrites is inhibited, the electrochemical performance is improved, and the electrochemical performance is improved. The technical problem that an existing copper negative electrode current collector is difficult to form a stable SEI film is solved.

The invention discloses a high-entropy double hydroxide / carbon fiber aerogel electromagnetic wave-absorbing material and a preparation method thereof, and the method specifically comprises the following steps: (1) activating green algae to obtain carbon fibers, and freeze-drying the carbon fibers to obtain aerogel carbon fibers; (2) immersing the aerogel carbon fiber subjected to heat treatment into a high-entropy layered double hydroxide precursor solution for hydrothermal reaction, and obtaining a high-entropy double hydroxide / carbon fiber aerogel material after the reaction; wherein the temperature of the hydrothermal reaction is 115-120 DEG C, and the reaction time is not less than 5 hours; and (3) freeze-drying the aerogel material obtained in the step (2) to obtain a target product. The high-entropy double hydroxide / carbon fiber aerogel electromagnetic wave-absorbing material disclosed by the invention can realize low-frequency absorption of 2.46 GHz under 2 to 8 GHz, and can realize broadband absorption of 12.44 GHz under 2 to 18 GHz.

To provide cuprous oxide powder with a relatively high packed bulk density and a production method for the cuprous oxide powder.SOLUTION: The cuprous oxide powder contains sulfur (S) with a content of less than 140 mass ppm and chlorine (Cl) with a content of less than 1000 mass ppm.SELECTED DRAWING: None

The invention discloses an oxyhalide atom cluster modified copper catalyst for electrochemical carbon dioxide reduction as well as a preparation method and application of the oxyhalide atom cluster modified copper catalyst, and aims to solve the problems of low activity, poor product selectivity and insufficient stability caused by catalyst reconstruction of a copper-based catalyst. According to the oxyhalide atom cluster modified copper-based catalyst, an oxyhalide atom cluster BiOX or MOCl is deposited on the surface of a metal active center copper-based material, and then negative voltage is applied in a CO2 gas atmosphere for reduction treatment, so that the oxyhalide atom cluster modified copper catalyst is formed. The general chemical formula of the oxyhalide atom cluster modified copper catalyst is BiOX / Cu or MOCl / Cu. The prepared oxyhalide cluster modified copper nano-catalyst has outstanding activity, selectivity and stability, has good multi-carbon Faraday efficiency in the electrochemical carbon dioxide reduction process, and has long-time stability, and FEC < 2 + > is larger than 75%.

The invention provides a copper-doped and coated sodium electric precursor as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out first coprecipitation reaction on a mixed metal salt solution, a precipitator solution and a complexing agent solution; the mixed metal salt solution comprises nickel ions, iron ions, manganese ions and copper ions; after the first coprecipitation reaction is finished, the pH value of the system is increased, a copper coating preparation stage is started, a second coprecipitation reaction continues to be carried out, after the second coprecipitation reaction is finished, the mixed metal salt solution is replaced with a copper salt solution, the pH value of the system is reduced, a third coprecipitation reaction continues to be carried out, and the copper-doped and coated sodium electric precursor is obtained. According to the preparation method, micro particles are introduced in the coating preparation stage, Cu < 2 + > is brought into a particle system in the stage that large particles adsorb the micro particles to grow, uniform coating is achieved, and finally the precursor which is uniform in element distribution, uniform in structure distribution, high in tap density, high in specific surface area and free of hardening is obtained.

The invention discloses a method for preparing micro-nano copper oxide powder through a microwave method and application of the micro-nano copper oxide powder. The method comprises the following steps: a) preparing a copper ion solution; b) adding a dispersing agent and a surfactant; c) adding urea; d) microwave heating reaction; e) separating and purifying a product; and f) drying and calcining. According to the preparation method, the rapid heating characteristic of microwave radiation is utilized, the effect of urea is combined, dispersing agents such as polyvinylpyrrolidone (PVP) and the like and surface active agents are added into a solution containing copper ions, the copper oxide nano-particles with the particle size distribution being 50-100 nanometers and even being controllable to be in the micron order are prepared, and the copper oxide nano-particles have good crystal structures and dispersity; the method is simple in process, high in reaction speed and low in energy consumption, and the obtained copper oxide nano particles can be used for preparing high-performance and high-purity copper oxide nano materials and have wide application prospects.

Herein described is a method for making a composite material, comprising the steps of (a) swelling a blank hydrogel or a blank organogel using an inorganic precursor mixture to form an inorganic precursor-containing solvent-containing gel, wherein the inorganic precursor mixture comprises a solvent and one or more inorganic precursors, and (b) converting the inorganic precursor into ceramic or metal within the solvent-containing gel by introduction of reagents and / or stimuli to obtain a composite material. Optionally, the composite material can be converted into an inorganic material with an additional step (c) comprising thermally treating the composite material. Also described are the resultant composite material and the optional resultant inorganic material.

The application discloses a kind of foam nickel supported copper-cobalt bimetallic composite catalyst and preparation method and application, belong to electrocatalytic material technical field.CuSO4·5H2O, CoSO4·7H2O and C6H5Na3O7 are mixed and using constant voltage deposition method is loaded on foam nickel substrate, and CuCo / NF precursor is obtained, and copper-cobalt bimetallic composite catalyst Cu x O-Co3O4 / NF with excellent catalytic activity and stability is successfully prepared by temperature programmed calcination.The application significantly enhances the adsorption capacity of nitrate molecules on the catalyst surface by utilizing the synergistic effect of Cu and Co, reducing the incidence of side reactions, thereby improving the catalytic efficiency of nitrate reduction reaction.Compared with traditional single catalyst, it shows higher ammonia yield, Faraday efficiency (FE) and better stability, and has broad application prospect.

The invention discloses a method for producing cuprous oxide by utilizing low-grade purified copper slag in a zinc hydrometallurgy process, and belongs to the technical field of purified copper slag. The invention relates to a method for producing cuprous oxide by utilizing low-grade purified copper slag in a zinc hydrometallurgy process. The method mainly comprises the following steps: acid leaching and impurity removal; the pre-leached filter residues are mixed with dilute sulphuric acid, air is introduced to serve as an oxidizing agent for oxidation leaching, after leaching, the pH is adjusted to 4.0-5.0 through CaCO3, and copper-containing leaching liquid is obtained through filtering; adding dextrose monohydrate into the copper-containing leachate, and adjusting the pH value by using NaOH; according to the method, through the closed-loop process of acid presoaking impurity removal, air oxidation leaching, glucose reduction and cuprous oxide Cl <-> removal, conversion from harmless treatment to resource high-value utilization of the low-grade copper slag is achieved, air is used for replacing KMnO4, MnO2 and other chemical oxidants, the cost is reduced, no harmful by-product exists, the green metallurgy requirement is met, and the method is suitable for industrial production. The prepared cuprous oxide is directly used for removing Cl <-> from a supernatant in electrolytic zinc, and the double contradiction of copper slag dilution and high cost of a Cl <-> removing agent in the industry is solved.

The invention discloses a method for preparing vinyl chloride by electrocatalytic dechlorination of 1, 2-dichloroethane, a working electrode of the method takes a metal oxide as a catalyst, and the metal oxide is selected from at least one of the following metal oxides: Pd, Mn, Fe, Co, Ni, Cu, Ru and Mo. According to the invention, the metal oxide powder is used as the electrocatalyst, the catalyst is coated on the electrode material to prepare the working electrode, the working electrode is applied to electrocatalytic dechlorination reaction of 1, 2-dichloroethane, vinyl chloride can be generated at high selectivity at room temperature, a new way is opened up for production of vinyl chloride by electrocatalytic dechlorination, and the method has wide application prospect. And a green and low-cost solution is provided for efficient synthesis of vinyl chloride.

The invention discloses a copper cyanoaurate hexagonal sheet loaded cuprous oxide material as well as a preparation method and application thereof. The copper cyanoaurate hexagonal sheet loaded cuprous oxide material comprises a copper cyanoaurate hexagonal sheet and cuprous oxide loaded on the copper cyanoaurate hexagonal sheet. According to the preparation method, copper ammonium chloride and potassium cyanoaurate are taken as raw materials, a copper cyanoaurate hexagonal sheet is prepared by a hydrothermal method, and then cuprous oxide is loaded on the copper cyanoaurate hexagonal sheet, so that the copper cyanoaurate hexagonal sheet loaded cuprous oxide material is obtained. The invention provides application of the copper cyanoaurate hexagonal sheet loaded cuprous oxide material as a catalyst for electrocatalytic reduction of carbon dioxide, and provides a gas diffusion electrode, and the catalyst in the gas diffusion electrode is the copper cyanoaurate hexagonal sheet loaded cuprous oxide material. The preparation process is simple and environment-friendly; the prepared material has higher ethylene selectivity and stability in the reaction of electrocatalytic reduction of carbon dioxide.

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.

To obtain cuprous oxide with appropriate performance. [Solution] The method for producing cuprous oxide includes the steps of: obtaining copper ink, which is a liquid composition containing copper particles (S10); forming a film on a substrate by coating or printing the copper ink (S12); producing cuprous oxide on a substrate by drying the film formed on the substrate with copper ink, and then heating it by irradiating it with light in the visible to infrared wavelength range in an atmosphere with an oxygen concentration of 10% to 21% (S16); and heating the cuprous oxide in an atmosphere with an oxygen concentration lower than the oxygen concentration at which the copper particles were oxidized and sintered (S18).

The invention belongs to the technical field of environmental functional material preparation, and discloses a method for preparing a Cu-coated Cu2O-coated C net by an ethanol-assisted combustion method and molecular oxygen activation application of the Cu-coated Cu2O-coated C net. The cleaned copper net is soaked in ethyl alcohol and then calcined, and the Cu-coated Cu2O-coated C net is obtained after repeated soaking and calcination. According to the optimized net, the local O2 enrichment concentration of the net in an aqueous solution is 2.3 times of the oxygen content in a normal aqueous solution, and the degradation rate constant of ofloxacin reaches 0.178 min <-1 >, which exceeds that of traditional photocatalysis and Fenton-like systems. In addition, the net exhibits gt; gt; gt; gt; gt; the degradation efficiency is 95%, and the method has the feasibility of pilot scale (the cost is 0.001 dollar per liter when 144 L of wastewater is treated), and provides a sustainable example for on-site water remediation. The preparation method disclosed by the invention is simple and easy to implement, relatively short in process and suitable for industrial production and use.

The application provides a preparation method of a biomimetic flagelliform nanowire and relates to the technical field of nanowire material preparation. The method comprises the following steps: mixing and immersing a trithiocyanic acid solution and copper hydroxide nanowires, and obtaining immersed nanowires after drying; the immersion conditions comprise the following steps: the temperature is 20-45 DEG C, and the time is 0.01-50 min; and the obtained immersed nanowires are calcined at 250-500 DEG C for 2-6 h. The method provided by the application uses a trithiocyanic acid solution to immerse Cu(OH)2 nanowires, and then calcines in a muffle furnace. The method provided by the application is simple in operation, the prepared nanowires are uniform and controllable in morphology, and can be applied to the fields of oil-water separation, battery negative electrode current collectors, adsorption and the like.

The invention discloses a method for realizing degradation of polyalkylene oxide compounds and controllable molecular weight through a promoter, which comprises the following steps: adding a photodegradation promoter into a high-molecular-weight polyalkylene oxide product, adjusting the proportion of the promoter and the proportion of effective components, and accurately controlling the shear molecular weight under the irradiation of an ozone emitter, so that the molecular weight of the polyalkylene oxide compounds is controllable. According to the invention, polyalkylene oxide with different molecular weights of 30,000-3,000,000 is prepared by using the photodegradation cocatalyst, so that the photodegradation cocatalyst can meet the requirements of customers in different fields, and meanwhile, the photodegradation cocatalyst prepared by the invention can be recycled to achieve the benefits of reducing cost and improving efficiency.

The present invention belongs to the technical field of liver disease treatment drugs, and specifically relates to an anti-inflammatory and anti-oxidative stress nanozyme Cu with cascade enzyme activity. 5.4 O@CNDs and its applications. 5.4 O@CNDs were prepared by the following steps: dissolving CuCl2 in a carbon dot aqueous solution, reacting at 75°C to 80°C for 10 min to 12 min, then adding L-ascorbic acid aqueous solution, adjusting the pH to 7.0-8.0 with NaOH solution, and reacting at 75°C to 80°C for 10 h to 12 h. After the reaction, the precipitate was removed by centrifugation, and the supernatant was dialyzed and freeze-dried to obtain the Cu@CNDs. 5.4 O@CNDs. The research results of this invention prove that nanozyme Cu 5.4 O@CNDs has the potential to treat a variety of acute liver injury diseases and is an intervention strategy with great clinical application prospects.