367 results about "Copper chloride" patented technology

The invention provides an amorphous copper nanolayer coated spherical porous silicon composite material and a preparation method and application thereof.The preparation method includes the step that the surface of spherical porous silicon is coated with an amorphous copper conductive nanolayer through a simple solution method.On the basis of the principle of replacement reaction, aluminum in aluminum-silicon alloy is replaced with copper to be coated on the surface of silicon, and the amorphous copper nanolayer coated spherical porous silicon composite material is obtained. And meanwhile, the rate of the replacement reaction is slowed down by utilizing different reaction activities of copper chloride in an organic solvent, so that the spherical morphology is kept, and meanwhile, the surface of silicon can be coated with a layer of amorphous copper nano layer with high conductivity. The invention also provides a preparation method of the material. Tests find that the conductivity of the material can be effectively improved due to the excellent conductivity of the copper nano layer, and the volume expansion effect of the material in the electrochemical cycle process can be effectively relieved due to the porous structure. Therefore, the combination of the two effectively improves the problems of poor conductivity and unstable structure of the silicon negative electrode material, and effectively improves the application performance of the silicon negative electrode material in the lithium ion battery negative electrode.

The invention discloses preparation of a bionic copper-based MOF nano-enzyme and application of the bionic copper-based MOF nano-enzyme in hydroquinone detection, and the bionic copper-based MOF nano-enzyme is prepared by the following method: dissolving terephthalic acid H2BDC and L-histidine His in N, N-dimethylformamide DMF to obtain a solution A; adding copper chloride CuCl2. 2H2O into the solution A obtained by C1, and stirring to form a uniform mixed solution; carrying out hydrothermal reaction on the mixed solution obtained from C2 for a certain time, centrifuging to obtain a solid precipitate, cleaning the solid precipitate, and drying to obtain the bionic Cu / His-MOF nano-enzyme; the invention also discloses an application of the sensor in hydroquinone detection. The bionic copper-based MOF nano-enzyme has the advantages of being simple and convenient to synthesize, high in substrate affinity, high in catalytic capacity and the like, and meanwhile, a rapid, sensitive and reliable HQ detection method is provided.

Natural renewable resources are used as raw materials, efficient and environment-friendly catalytic performance is achieved through multi-stage optimization, coconut shells, fruit shells, reeds and wood chips are used as base materials in the process, a channel template is introduced after fine crushing, a graded pore structure is constructed, and the mercury-free catalyst is prepared. Dynamic extrusion forming and program temperature control carbonization-activation technologies are adopted to form an active carbon skeleton with a high specific surface area, a pulsating pressure impregnation system is innovatively designed, ultrasonic vibration is combined to strengthen copper chloride solution permeation, deep and uniform loading of active components is realized, and a mixed pickling process is developed in a matched manner. Metal impurities are efficiently removed through the synergistic effect of hydrochloric acid and citric acid, and the obtained catalyst has three-dimensional through pore channels and high-activity component dispersity, can replace a traditional mercury-containing catalyst to be applied to the fields of vinyl chloride synthesis and the like, remarkably reduces the risk of environmental pollution, improves the reaction selectivity and prolongs the service life of the catalyst, and is suitable for industrial production. And a technical support is provided for green transformation of the chemical industry.

The invention relates to the field of biological functional materials, and discloses a preparation method and application of a Cu-doped W18O49 nano-enzyme with near-infrared two-region photoresponse. The specific method is as follows: a solvothermal method is adopted, the Cu-doped W18O49 (xCu-W18O49) nano-enzyme is prepared by regulating and controlling the molar doping amount of a Cu element, taking tungsten chloride as a tungsten source, taking copper chloride dihydrate as a copper source and taking n-propyl alcohol as a reaction solvent. The crystallinity of the nano enzyme is good, and the nano enzyme shows remarkable glutathione oxidase (GSHOx) activity in a tumor microenvironment. Compared with W18O49, Cu doping enables enzyme activity to be remarkably improved, the problem of low activity generally existing in current cancer treatment nano-enzymes is effectively solved, and meanwhile the nano-enzyme has application potential in the aspect of CT imaging.

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 discloses a method for producing mRNA (messenger ribonucleic acid) template plasmids by fermenting escherichia coli. When the recombinant escherichia coli is fermented and cultured, a seed solution of the recombinant escherichia coli is inoculated into a basic culture medium to be fermented and cultured until the OD600 value of fermentation liquor is 18-22, then a fed-batch culture medium is continuously added at the feeding rate of 5-15 mL / L / h to be subjected to continuous fed-batch fermentation culture, the basic culture medium contains 0.05-0.2 mmoL / L of ferric salt compound and 0.05-0.2 mmoL / L of copper chloride dihydrate, and the basic culture medium contains 0.05-0.2 mmoL / L of ferric salt compound and 0.05-0.2 mmoL / L of copper chloride dihydrate. The basal culture medium contains 10-15 g / L of copper chloride dihydrate and 100-300 mg / L of p-hydroxybenzoic acid, the carbon source of the basal culture medium contains 0.1-0.3 mmoL / L of a ferric salt compound, 0.1-0.3 mmoL / L of copper chloride dihydrate and 100-300 mg / L of p-hydroxybenzoic acid, the carbon source of the fed-batch culture medium contains 360-480 g / L of glycerol, and the ferric salt compound is one or more of ferrous citrate, ferric ammonium citrate or ferrous sulfate heptahydrate. According to the method, the yield and superhelix content of the mRNA template plasmids are improved by optimizing the culture medium formula and culture conditions, and large-scale production of the high-quality target mRNA template plasmids is facilitated.

The invention provides a chitosan-based hydrogel nano material as well as a preparation method and application thereof, and belongs to the technical field of chemical synthesis and biomedicine. The method comprises the following steps: firstly, dissolving pyropheophorbide A and copper chloride in a solvent, and carrying out heating reflux reaction to obtain PPA-Cu; then, the PPA-Cu is grafted to chitosan (CS), and CS-PPA-Cu is obtained; arginine is added into the prepared CS-PPA-Cu solution, and CS-PPA-Cu (at) Arg is obtained; finally, the CS-PPA-Cu-coated Arg and the prepared PF solution are mixed and stirred, standing is conducted at the room temperature, and the chitosan-based CS-PPA-Cu / PF-coated Arg hydrogel is obtained. The hydrogel nano material has excellent bioluminescence performance, and can specifically recognize the position of wound inflammation. The prepared hydrogel nano material has the combined antibacterial ability of photodynamic, photothermal and NO gas release, and achieves the effect of promoting wound healing.

The invention discloses an antibacterial dressing based on gallic acid-copper coated gamma-polyglutamic acid and a preparation method and application thereof, and belongs to the technical field of biomedicines.The preparation method comprises the steps that gallic acid and copper chloride dihydrate are dissolved in pure water according to the mass ratio of 3: 1, and stirring is conducted to form a solution I; stirring and reacting the solution I at 40 DEG C for 24 hours, centrifuging, collecting precipitate, washing with pure water, and freeze-drying to obtain gallic acid-copper nanoparticles; the gallic acid-copper nanoparticles and gamma-polyglutamic acid powder are mixed and dissolved in pure water according to the mass ratio of 3: 20, and after freeze drying, gallic acid-copper coated gamma-polyglutamic acid hydrogel powder is obtained. The gallic acid-copper coated gamma-polyglutamic acid hydrogel powder disclosed by the invention can absorb exudate near a wound and is subjected to in-situ gelation to form a hydration layer, so that damage to newborn tissues caused by frequent dressing replacement is avoided; it is verified that the healing promoting effect of the hydrogel can be remarkably enhanced through blue light adjuvant therapy, and the healing speed of infected wounds is remarkably increased.

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 application provides a kind of superfine copper powder and its preparation method and application, the preparation method of the above-mentioned superfine copper powder uses two-step liquid phase reduction method to prepare superfine copper powder, and improves process conditions, using dropwise feeding mode. Among them, the first step uses alkaline ascorbic acid solution to reduce copper chloride to cuprous chloride with narrow particle size distribution; the second step uses ferrous sulfate and sodium citrate as mixed reducing agent, and sodium citrate can also be used as a complexing agent, which helps to reduce the cuprous chloride to spherical, well-dispersed, uniform particle size distribution of superfine copper powder. At the same time, the raw materials used by the application are easy to obtain, the reaction process is mild, and organic solvents and toxic and hazardous reagents such as sodium borohydride and hydrazine hydrate are not needed, the preparation process has cost effectiveness, is friendly to the environment, and is suitable for industrial production.

The invention discloses a preparation method of a Cu3Sn alloy electrocatalyst and application of the Cu3Sn alloy electrocatalyst in urea synthesis. The preparation method comprises the specific preparation steps that glucose, dicyandiamide, copper chloride and stannous chloride dehydrate are ground and mixed to be uniform, and a material A is obtained; transferring the obtained material A into a tubular furnace, sintering for 2 hours at 420-500 DEG C in a hydrogen / argon mixed atmosphere, and naturally cooling to room temperature to obtain a material B; and uniformly grinding the obtained material B to obtain the Cu3Sn alloy electrocatalyst. The Cu3Sn alloy electrocatalyst can be used in a reaction system for co-reduction of nitrate and carbon dioxide into urea through electrocatalysis. Compared with a traditional industrial method, the method for preparing urea by catalyzing co-reduction of nitrate and carbon dioxide through the prepared Cu3Sn alloy electrocatalyst consumes greenhouse gas and does not discharge pollutants into air.

The invention relates to the technical field of solar cells, and particularly discloses conductive paste for a solar cell, a preparation method of the conductive paste and an electrode. The conductive paste for the solar cell comprises the following components in percentage by weight: 88%-92% of carbon-based nano-copper particles, 4%-6% of glass powder and 4%-6% of an organic additive, the carbon-based nano-copper particles are prepared by reacting copper chloride with glucose and then calcining, the particle size is 52-100nm, and copper oxidation is inhibited by using a carbon layer; the organic additive is composed of a stabilizer, resin and an organic solvent according to a ratio of 1: 3: 9. The conductive material is prepared by mixing, dispersing, grinding and filtering, and can be prepared into a solar cell conductive material by silk-screen printing and high-temperature sintering. The conductive paste is low in cost, high in oxidation resistance and excellent in conductivity, and can replace silver paste to reduce the manufacturing cost of the solar cell, improve the performance and prolong the service life.

The invention provides a polyvinyl alcohol / chitosan composite compression hemostatic sponge with an antibacterial function and a preparation method thereof, and belongs to the technical field of medical materials. The polyvinyl alcohol / chitosan composite compression hemostatic sponge with the antibacterial function, provided by the invention, comprises a dual-network hydrogel structure formed by carboxymethyl chitosan and aldehyde polyvinyl alcohol; the double-network hydrogel structure has high stability and fixity, so that the composite compression hemostatic sponge has excellent stability. Raw materials used in the invention comprise carboxymethyl chitosan, formylated polyvinyl alcohol and antibacterial peptide, and the three raw materials are connected through covalent bonds and ionic bonds to form a dual-network hydrogel structure. By introducing gallic acid and copper chloride, a metal-organic network structure can be formed, the mechanical stability of the composite compression hemostatic sponge can be further improved, and the antibacterial performance of the composite compression hemostatic sponge can be further improved.

The invention relates to a preparation method of a novel anti-freezing rewarming antibacterial medical gel dressing, belongs to the field of composite material-based hydrogel, and is applied to prevention and treatment of frostbite of field operating personnel in high-cold regions. The preparation method comprises the following step: reacting anhydrous copper chloride, polyvinylpyrrolidone and thiourea to obtain copper sulfide. The preparation method comprises the following steps: dispersing copper sulfide, polymerizing dopamine hydrochloride in an alkaline oxygen-containing environment to gather on the surface of the copper sulfide so as to form polydopamine copper sulfide (PDA-coated CuS), adding N 'N-methylene bisacrylamide and ammonium persulfate, stirring, pouring into a mold, and polymerizing in an environment of 60 DEG C, thereby obtaining PDA-coated CuS / Pro / PAM gel. CuS and PDA are combined, so that the biocompatibility and antibacterial property of CuS are enhanced, the photo-thermal property of dopamine is improved, and proline is used as an antifreeze agent to destroy hydrogen bonds of water molecules and inhibit formation of ice crystals. The medical gel dressing has the beneficial effects that the medical gel dressing with the anti-freezing, rewarming and antibacterial functions can be used in a low-temperature environment of-24 DEG C, and a good rewarming environment is provided for a frostbite part.

The invention discloses a process for adsorbing and separating ethane by using catalytic dry gas, and aims to solve the technical problems that in the prior art, the ethane adsorption effect is relatively poor, an adsorbent is not easy to regenerate, the chemical stability is relatively poor, next adsorption can be carried out only after desorption is completed after adsorption saturation, and the working efficiency is low. The process comprises the following steps: S1, pretreating dry gas; s2, preparing an adsorbent; and S3, the dry gas pretreated in the S1 is pressurized to the pressure condition required by the process through a compressor, and then the dry gas is cooled through circulating water and low-temperature refrigerant water in sequence. According to the process, the adsorbent is prepared by loading copper chloride on activated carbon, the prepared adsorbent has a better adsorption effect on ethane, the adsorbent can be regenerated and is good in chemical stability, and through the design of the two adsorption beds, one adsorption bed performs desorption while the other adsorption bed performs adsorption operation; and continuous adsorption and desorption operation can be realized, and the working efficiency is higher.

The invention relates to the technical field of energy systems, in particular to a methane gradient utilization system based on SOFC (solid oxide fuel cell) and copper chloride circulation, comprising a methane reforming and SOFC power generation unit for converting methane fuel into electric energy and combusting anode tail gas to generate high-temperature flue gas; the copper-chlorine circulating hydrogen production unit is connected with a high-temperature flue gas pipeline of the methane reforming and SOFC power generation unit, heat energy of the high-temperature flue gas is used for driving a copper-chlorine thermochemical circulating reaction, and hydrogen is prepared by taking water as a raw material; and the waste heat power generation and recovery unit is connected with a cathode tail gas pipeline of the methane reforming and SOFC power generation unit and a tail gas outlet pipeline of the copper chloride circulation hydrogen production unit, and is used for carrying out power generation and heat supply on waste heat in a cascade recovery system. According to the system, grade alignment and gradient utilization of energy are achieved, high-temperature waste gas of the SOFC system is sequentially used for driving copper-chlorine hydrogen production, ORC power generation and hot water supply, and the comprehensive utilization efficiency of energy is remarkably improved.

A high-entropy nano-array for electrocatalytic nitrate reduction coupling waste plastic conversion is prepared by the following method: (1) immerse the nickel foam into a hydrochloric acid solution to remove the surface oxide layer and oil stains, rinse with deionized water / ethanol three times, and dry for subsequent use; (2) solid powders of sodium chloropalladate, platinum acetylacetate, nickel chloride hexahydrate, copper chloride dihydrate, silver trifluoroacetate and tungsten hexacarbonyl are poured into an N-N dimethylformamide solution, ultrasonic is used to dissolve the solid powders, then glacial acetic acid and the treated nickel foam are added to the above solution, and after ultrasonic, heating in an oven is carried out, after the reaction is completed, water and ethanol solution are used for alternate washing, and drying is carried out, and the high-entropy nano-array catalyst is obtained. A preparation method of a high-entropy nano-array for electrocatalytic nitrate reduction coupling waste plastic conversion is provided. The high-entropy nano-array has excellent electrocatalytic activity and stability.

The invention relates to the technical field of copper powder production, in particular to a method for preparing high-purity low-chlorine copper powder by taking acidic copper chloride etching waste liquid as a raw material. According to the method for preparing the high-purity low-chlorine copper powder by using the acidic copper chloride etching waste liquid as the raw material, hydrazine hydrate is added into the acidic copper chloride etching waste liquid, then a sodium hydroxide solution is used for adjusting the pH value, then heating treatment, suction filtration centrifugation, washing and drying are conducted, a first product is obtained, then first product dispersion liquid is prepared, and the high-purity low-chlorine copper powder is prepared. And adding an alkaline solution into the mixed solution, mixing, carrying out suction filtration, centrifuging, washing and drying to obtain a second product, finally preparing a second product dispersion liquid, and preparing the high-purity low-chlorine copper powder by using the obtained second product dispersion liquid. The high-purity low-chlorine copper powder prepared by the preparation method disclosed by the invention not only has better purity, but also has excellent apparent density, so that the quality of the high-purity low-chlorine copper powder is effectively ensured.

The application discloses an iron / copper-porphyrin nanoparticle and a preparation method and application thereof, and the nanoparticle is prepared through the following steps: adding iron chloride, copper chloride, tetra(4-carboxyphenyl)porphyrin and benzoic acid into a reaction solvent N,N-dimethylformamide solution, uniformly stirring at room temperature, and reacting at high temperature; and after the reaction is completed, the iron / manganese-porphyrin nanoparticle is obtained through centrifugation and washing. The iron / manganese-porphyrin nanoparticle is prepared by using a brand-new method, the nanoparticle can be degraded in a glutathione solution and release iron ions and copper ions, is used for catalyzing hydrogen peroxide to be converted into a hydroxyl radical (•OH), and tetra(4-carboxyphenyl)porphyrin can generate singlet oxygen (O2) under 660 nm laser irradiation, and is expected to become a good nano-carrier for accelerating photodynamic therapy-chemical kinetic therapy. 1 O2).

The invention discloses a synthesis method of 5-(1H-pyrrole-1-yl)-2-mercaptobenzimidazole, which comprises the following steps: carrying out cyclization condensation reaction on o-phenylenediamine and thiourea in an acidic environment provided by hydrochloric acid to obtain 2-mercaptobenzimidazole; the preparation method comprises the following steps: carrying out nitration reaction on 2-mercaptobenzimidazole, sulfuric acid and nitric acid to obtain 2-mercapto-5-nitrobenzimidazole; the preparation method comprises the following steps: carrying out nitro reduction reaction on 2-sulfydryl-5-nitrobenzimidazole and hydrogen under the catalysis of nickel to obtain 5-amino-2-sulfydryl benzimidazole; the preparation method comprises the following steps: carrying out an N-alkylation reaction on 5-amino-2-mercapto benzimidazole and tetrahydro-2, 5-dimethoxyfuran under the catalysis of copper chloride to generate 5-(1H-pyrrole-1-yl)-2-mercapto benzimidazole, and carrying out a reaction on the 5-amino-2-mercapto benzimidazole and tetrahydro-2, 5-dimethoxyfuran to generate the 5-(1H-pyrrole-1-yl)-2-mercapto benzimidazole. The method disclosed by the invention has the outstanding advantages of mild and easily-controlled conditions, simple and convenient post-treatment, high yield, economy, environmental protection, suitability for large-scale production and the like, conforms to the green chemical development concept, and has important application value.

This invention relates to a method for preparing a nanozyme detection reagent for carbofuran residues in apples, belonging to the field of pesticide residue and food safety technology. Specific steps: (1) Prepare mesoporous polydopamine powder using polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer, dopamine hydrochloride, etc.; (2) Prepare a copper-manganese bimetallic carbon dot solution using citric acid, copper chloride, manganese chloride, and ethylenediamine; (3) Prepare the nanozyme detection reagent using the mesoporous polydopamine solution and the copper-manganese bimetallic carbon dot solution. Mesoporous polydopamine has a large specific surface area, providing numerous sites for carbon dot loading and effectively adsorbing carbofuran molecules. The copper-manganese bimetallic carbon dots give the nanozyme detection reagent good enzyme-like activity and generate pesticide concentration-dependent colorimetric and photothermal signals. This invention achieves mutual verification of dual-mode output signals, significantly improving detection reliability; and completes detection within 1.5 h.

The application relates to a supported cheap CuNi bimetallic catalyst and a preparation method thereof, which is prepared by uniformly mixing copper chloride and nickel chloride, adding a graphene oxide (GO) solution, neutralizing the mixed solution by using an alkali solution to adjust the pH value of the mixed solution, heating and stirring the mixed solution, dropwise adding a sodium borohydride solution and continuously stirring, cooling and ripening, then removing the upper solution, centrifugally treating and washing the lower precipitate for multiple times, and drying and crushing. The supported cheap bimetallic Cu1Ni1@rGO catalyst has a stable chemical structure, the dispersion of the nanoparticles can be improved by loading the metal on the graphene oxide, the catalyst has high catalytic activity, stability and catalytic efficiency when being used in the hydrogenation reduction reaction of nitrile and the like, and the recyclable use rate of the catalyst in the reaction can be improved.

The invention discloses a preparation method and application of a Cu-BNNs chemiluminescent probe for detecting nicotine. Boron nitride and copper chloride dihydrate are used as raw materials, oil bath heating is carried out in N-methyl pyrrolidone (NMP) to synthesize a Cu-BNNs probe, the Cu-BNNs probe can generate strong chemiluminescence signals with nicotine and sodium hypochlorite, a chemiluminescence detection platform of nicotine is constructed based on the strong chemiluminescence signals, and the chemiluminescence detection platform is used for detecting the nicotine. The method can be used for detecting the content of a nicotine solution and the content of nicotine in cigarette smoke. The method has the advantages of high sensitivity, strong anti-interference capability, low detection cost, simplicity and convenience in operation and the like.

The application discloses a preparation method of a photocatalyst for CO2 reduction and application thereof. The photocatalyst is prepared through the following steps: first, preparation of the photocatalyst bismuth oxysulfate; second, metal loading modification of the photocatalyst bismuth oxysulfate. Thiocyanic acid and bismuth nitrate are used as raw materials to synthesize the photocatalyst bismuth oxysulfate, and copper chloride or silver nitrate reagent is selected as a material for metal loading modification of the bismuth oxysulfate, and the selected materials are inexpensive and easy to purchase, and the economic cost is low. The photocatalyst prepared by the method has the advantages of high selectivity, can accelerate electron movement under light conditions, promotes CO2 reduction degradation, and has high stability, and is an ideal photocatalyst. Compared with existing photocatalyst materials, the material has high catalytic degradation reducibility and selectivity, high stability, and when used as a CO2 photocatalyst, can efficiently reduce and convert CO2 into multi-carbon products.

The application belongs to the technical field of zinc ion batteries, and specifically discloses a zinc negative electrode and application of the zinc negative electrode in a zinc ion battery, wherein the zinc negative electrode comprises zinc material, the surface of the zinc material is coated with a protective layer, the protective layer is composed of a heterojunction material, a binder and an organic solvent, the mass ratio of the heterojunction material, the organic solvent and the binder is 7:2:1, the heterojunction material is a Cu2O / CuO heterojunction, the preparation method of the Cu2O / CuO heterojunction is as follows: taking alkaline copper chloride as a precursor and glucose as a reducing agent, the Cu2O / CuO heterojunction is generated in an alkaline hydrothermal system through one-step reaction, and then the Cu2O / CuO heterojunction is purified through hot water washing, the heterojunction material contains oxygen vacancies at the Cu2O / CuO interface, and the heterojunction interface forms a built-in electric field and a band bending. 2+ The Cu2O / CuO heterojunction protective layer of the application is driven by a built-in electric field, is functionalized by oxygen vacancies, and is self-aligned by a band, and the above-mentioned three mechanisms are synergized, so that the Zn 2+ full-path fast transportation, which is significantly better than existing single-phase or physical mixed protective layers.

The invention discloses a method for degrading pyridine in waste water, which comprises the following steps: dissolving sodium hydroxide and ascorbic acid in an ethanol solution to form a colorless and transparent solution, measuring the colorless and transparent solution, slowly dropwise adding the colorless and transparent solution into the prepared ethanol solution containing copper chloride, stirring by using a magnetic stirrer at room temperature, and filtering to obtain a filtrate; and finally, green and clear copper nanoparticles are formed. Mixing an ethanol solution containing glutathione with the prepared copper nanoparticles, stirring and reacting at room temperature to obtain a white precipitate, and centrifuging and drying to obtain the prepared copper nano enzyme; the method comprises the following steps: domesticating activated sludge, taking the domesticated pyridine wastewater, adjusting the pH value, adding hydrogen peroxide and copper nano-enzyme for reaction, then adding into an SBR (sequencing batch reactor), and finally measuring the content of pyridine in the treated wastewater. The hydrogen peroxide and the copper nano-enzyme can generate a Fenton-like reaction, so that pyridine can be efficiently degraded, the reaction process is rapid, the operation is simple, the cost is low, and the green and environment-friendly effects can be realized.

The application relates to the technical field of electrocatalysis, in particular to an Ag@AgCl / Cu2O double-shell structure nanowire catalyst, a preparation method thereof, an electrode and a preparation method thereof and application. The preparation method of the Ag@AgCl / Cu2O double-shell structure nanowire catalyst comprises the following steps: 1) uniformly mixing sodium chloride, ferric nitrate, polyvinylpyrrolidone and silver nitrate in ethylene glycol, reacting at 120-140 DEG C for 20-50 min, and obtaining a suspension; 2) uniformly mixing the suspension prepared in the step 1) with copper acetate and polyvinylpyrrolidone in ethylene glycol, then reacting at 120-140 DEG C, then uniformly mixing with copper chloride, and reacting at 120-140 DEG C, and then carrying out solid-liquid separation. The Ag@AgCl / Cu2O double-shell structure nanowire material prepared by the application can be widely used in the field of electrochemical energy storage devices for electro-reducing carbon dioxide.

The application discloses a kind of high-activity polyphenol oxidase and preparation method thereof, belong to nano mimic enzyme synthesis technical field.The polyphenol oxidase of the application is with copper ion as active center, 2-methyl imidazole and guanylate disodium as organic ligand.Preparation method thereof includes the following steps: guanylate disodium solution is added to copper chloride solution under stirring condition, to obtain first mixed solution;First mixed solution is slowly added to 2-methyl imidazole solution under stirring condition, to obtain second mixed solution;Second mixed solution is centrifuged after ultrasonic at room temperature, to obtain brown precipitate, and the polyphenol oxidase is prepared by washing and drying brown precipitate.The mimic enzyme prepared by the application has higher catalytic performance, better stability and feasibility of large-scale preparation compared with natural enzyme, and will have broad application prospect in the field of biosensor.

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.

The invention discloses a copper slag derived microsphere composite catalyst which is prepared by the following steps: crushing and screening dried copper slag, mixing copper chloride and the copper slag, adding the mixture into an oxalic acid solution, uniformly stirring and mixing to obtain slurry, dropwise adding the slurry into silicone oil, stirring to form balls, aging at 55-65 DEG C for 12 hours, collecting the balls, and calcining at 500-600 DEG C for 2-4 hours to obtain the copper slag derived microsphere composite catalyst. And putting the calcined product into a thioacetamide-ethylene glycol solution, uniformly mixing, carrying out a hydrothermal reaction at 150-170 DEG C for 12 hours, carrying out solid-liquid separation, and drying the solid, the catalyst disclosed by the invention shows excellent PMS activation and degradation effects on oxytetracycline hydrochloride, tetracycline hydrochloride, chlortetracycline hydrochloride, methylene blue and methyl orange; the invention provides a new solution for solving the problem of secondary pollution caused by the copper slag and the problem of water environment pollution caused by antibiotic organic pollutants.