631 results about "Copper chloride" patented technology

The invention discloses a nano-copper modified reduced graphene oxide powder preparation method, which comprises: S1, uniformly mixing a reduced graphene oxide dispersion liquid and a copper chloride solution to obtain a mixed liquid A; s2, reducing the mixed solution A by adopting a reducing agent to obtain a mixed solution B; s3, adjusting the pH value of the mixed solution B to 8-9 to obtain a mixed solution C; s4, titrating the mixed solution C with an alkaline solution until the mixed solution C is red, and standing and filtering to obtain a precipitate D; s5, washing the precipitate D until the pH value of supernatant liquid is neutral, and drying to obtain a precipitate E; and S6, sintering the precipitate E in an inert atmosphere to obtain the nano-copper modified reduced graphene oxide powder. The invention further discloses the nano-copper modified reduced graphene oxide powder, the high-strength and high-conductivity graphene copper plating-aluminum matrix composite and a preparation method of the high-strength and high-conductivity graphene copper plating-aluminum matrix composite.

The invention relates to a degradable filter element and a preparation method thereof, and belongs to the technical field of PLA filter elements. The degradable filter element is arranged between an atomizing element shell and a metal heating wire, a plurality of capillary holes are formed in the degradable filter element and used for being filled with tobacco tar, and the degradable filter element is prepared from a degradable composite material through melt spinning. The degradable composite material comprises the following components: polylactic acid and modified silicon dioxide, wherein the modified silicon dioxide is prepared by taking nano silicon dioxide, a silane coupling agent, ferulic acid, amino acid and copper chloride as raw materials, the silicon dioxide is organically modified, so that the dispersity of the silicon dioxide in a polylactic acid system is improved, the interface binding force of the silicon dioxide is improved, and the mechanical property of a polylactic acid material is improved; various antibacterial components are introduced, so that the antibacterial property of the polylactic acid material can be effectively improved.

The invention discloses a preparation method of antistatic modified chinlon filaments, and relates to the field of chinlon filaments. When the antistatic modified chinlon filament is prepared, (formylmethyl) diethyl phosphate and 1-aminopyrrole react to prepare pyrrole diethyl phosphate; reacting the hydroxylated multi-walled carbon nanotube with pyrrole diethyl phosphate to obtain a modified multi-walled carbon nanotube; the preparation method comprises the following steps: reacting 2, 2 '-bipyridine-5, 5'-dicarboxylic acid with 2-amino-5-nitrophenol, and then reducing to obtain a benzoxazole diamine monomer; then, adipic acid, 1, 5-diaminopentane and a benzoxazole diamine monomer are subjected to a reaction, and modified polyamide is prepared; uniformly mixing the modified polyamide, the modified multi-walled carbon nanotubes, pyrrole, ferric trichloride and copper chloride, and performing melt spinning to obtain the antistatic modified polyamide filament. The antistatic modified chinlon filament prepared by the invention has excellent antistatic, flame-retardant, anti-aging and mechanical properties.

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.

The invention discloses a self-adaptive light-dimming temperature-control polyurethane protective film and a preparation method thereof, and relates to the technical field of high polymer materials. When the self-adaptive light-dimming temperature-control polyurethane protective film is prepared, castor oil reacts with sulfhydrylated thiosemicarbazone to prepare modified castor oil; the preparation method comprises the following steps: carrying out ring opening polymerization on flame-retardant cyclotetrasiloxane and tetramethyl cyclotetrasiloxane to prepare a siloxane oligomer; enabling vanadium pentoxide, oxalic acid and tungstic acid to react to prepare tungsten-doped vanadium dioxide; the preparation method comprises the following steps: carrying out a reaction on tungsten-doped vanadium dioxide and allyltriethoxysilane to prepare modified vanadium dioxide; uniformly mixing castor oil, modified castor oil, siloxane oligomer, isophorone diisocyanate and copper chloride, pouring the mixture into a mold, and performing curing molding, so as to obtain the self-adaptive light-dimming temperature-control polyurethane protective film. The self-adaptive light-dimming temperature-control polyurethane protective film prepared by the invention has excellent flame retardance, tensile strength and self-adaptive light-dimming temperature-control performance.

The invention relates to the technical field of organic synthesis, and provides a method for efficiently preparing 1, 3-cyclohexanedione through selective hydrogenation, which comprises the following steps: preparing hexagonal mesoporous silicon oxide by taking tetraethoxysilane as a silicon source and dodecylamine as a structure-directing agent, compounding the hexagonal mesoporous silicon oxide with titanium oxide to obtain a carrier, and taking palladium as a catalytic active component to prepare a catalyst I; preparing a copper-based coordination polymer by taking copper chloride dihydrate and phenylacetylene as raw materials; preparing a catalyst II by taking nickel as a catalytic active component; the method comprises the following steps: reacting resorcinol with hydrogen under the combined action of alkali, water, a catalyst I and a catalyst II, and then acidizing and recrystallizing to obtain the target product 1, 3-cyclohexanedione. According to the method, resorcinol is taken as a raw material, the self-made catalyst I and the self-made catalyst II are adopted for concerted catalytic hydrogenation, 1, 3-cyclohexanone with relatively high purity is prepared, and the catalysts are high in catalytic activity, easy to separate and still have very good catalytic performance after being recycled for multiple times.

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 relates to the field of preparation of quantum dot cuprous oxide, in particular to a simple preparation method and application of high-dispersion cuprous oxide quantum dots, and the method comprises the following steps: mechanically grinding commercial P25 serving as a carrier catalyst and copper chloride in an agate mortar, uniformly mixing, adding hydrazine hydrate, continuously grinding for 30 minutes, washing the obtained solid product with deionized water, and drying to obtain the high-dispersion cuprous oxide quantum dots. And drying at room temperature to obtain the cuprous oxide quantum dots uniformly dispersed on the TiO2 carrier. The preparation method of the metal quantum dots is simple and convenient, the raw materials are simple and easy to obtain, repeatability is good, and the metal quantum dots are highly dispersed. The material prepared through the method can remarkably improve the photocatalytic hydrogen evolution and nitrogen reduction efficiency of a carrier catalyst. The method has a wide application value in the creation of the quantum dot catalyst in the field of sustainable energy sources such as photocatalysis.

The invention discloses a polymer PET composite board and a preparation method thereof, and relates to the technical field of composite materials. When the high-molecular PET composite board is prepared, 4-(2-furan)-3-thiosemicarbazone and 6-hydroxyhexanal react and then react with copper chloride to prepare a thiosemicarbazone copper complex; polymerizing terephthalic acid, ethylene glycol and the thiosemicarbazone copper complex to prepare functional polyester; the preparation method comprises the following steps: carrying out polymerization growth on pre-treated silicon nitride by using 1, 3-bis (chloromethyl)-1, 1, 3, 3-tetramethyldisiloxane and 10-(2, 5-dihydroxyphenyl)-10-hydro-9-oxa-10-phosphaphenanthrene-10-oxide on the pre-treated silicon nitride, so as to prepare pre-modified silicon nitride; the pre-modified silicon nitride and N-(2-aminopropyl) maleimide are subjected to a reaction, and modified silicon nitride is prepared; and melting and mixing the functional polyester and the modified silicon nitride, and then calendaring and molding to obtain the high-molecular PET composite board. The high-molecular PET composite board prepared by the invention has excellent mildew-proof, antibacterial, flame-retardant, wear-resistant and self-repairing properties.

The invention relates to a method for determining potassium by using a nano-enzyme-based colorimetric probe, and the probe and application thereof. The invention relates to a method for determining potassium by using a nano-enzyme-based colorimetric probe, which comprises the following steps of: synthesizing copper and cerium-containing phosphotungstic acid nano-enzyme by using phosphotungstic acid, cerous nitrate and copper chloride as precursors through a hydrothermal method, detecting the absorbance of K < + > standard solutions with different concentrations by using the copper and cerium-containing phosphotungstic acid nano-enzyme as a probe, establishing a quantitative relation between the absorbance and the K < + > concentration, drawing a standard curve, obtaining a regression equation, and determining the potassium content by using the regression equation. And detecting the absorbance of the sample determination standard solutions with different concentrations, and obtaining the K < + > content of the sample through the regression equation. According to the method, the nano-enzyme (Cu, Ce-PWs) is prepared by using tungsten-molybdenum heteropoly acid with high negative charges, unique chelating properties and various structures and Ce < 4 + > and Cu < 2 + > as raw materials, strong mimic enzyme laccase activity is generated through the synergistic effect of Ce atoms and Cu atoms, and the activity of the mimic enzyme laccase is further improved in the presence of H2O2.

The invention discloses a preparation method of a eutectic solvent for separating and recycling metals in waste crystalline silicon photovoltaic panels. According to the method, betaine hydrochloride is used as a hydrogen bond acceptor, ethylene glycol is used as a hydrogen bond donor to prepare a deep eutectic solvent with high solubility, and copper chloride is used as an oxidizing agent to leach metal silver and metal aluminum in the waste photovoltaic panel crystal silicon wafer. The leaching system is easy to operate, strong acid and strong alkali used in traditional wet recovery do not participate in the leaching system, and the problem of discharge of waste gas and waste water is solved. In the recovery process, the used ammonia water and water can be reused after rotary evaporation. Compared with a traditional crystalline silicon photovoltaic panel recycling route, the method has the advantages that the technological process is shortened, the cost is reduced, and an effective method is provided for recycling the waste crystalline silicon photovoltaic panel.

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 relates to the technical field of copper-based catalysts, in particular to a copper-based catalyst and a preparation method thereof.The preparation method comprises the steps that a pore-enlarging agent is used for conducting pore-enlarging treatment on aluminum oxide, and a pore-enlarging type aluminum oxide carrier is obtained; fully dissolving copper chloride, samarium chloride and lanthanum chloride by using deionized water, dipping a chambering type alumina carrier in the obtained dissolved solution, standing and filtering to obtain a filter material and a filtrate; carrying out steam explosion treatment on the filter material, then soaking the filter material in the filtrate, standing and filtering to obtain a loaded material; and roasting the loaded material at high temperature to prepare the copper-based catalyst. Starch or methyl cellulose / ammonium bicarbonate is combined to serve as a pore-enlarging agent, the pore-enlarging effect can be greatly improved, steam explosion treatment is carried out, a dissolving solution can be driven to fully enter pore channels of a carrier in a high-pressure environment, and copper, samarium and lanthanum can be driven to be evenly distributed on the surfaces of the pore channels and the carrier in subsequent vaporization flow, so that the pore-enlarging effect is improved. Therefore, the quality of the copper-based catalyst is improved.

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 provides a neutralization and utilization method of an acidic waste etching solution. The method comprises the following steps: mixing the acidic etching waste liquid with an ammonium bicarbonate solution; in the mixing process, the mixing temperature is controlled to be 40-60 DEG C, the pH value is adjusted to be 3.5-4.5, and slurry is obtained; separating the slurry to obtain copper oxychloride wet crystals and an ammonium chloride crude product solution; carrying out dechlorination treatment on the copper oxychloride wet crystals by using an alkaline solution, and filtering to obtain a copper oxide filter cake and chloride waste liquid; the temperature of the dechlorination treatment is 70-90 DEG C; performing post-treatment on the copper oxide filter cake to obtain copper sulfate; and carrying out precipitation treatment on the ammonium chloride crude product solution to obtain an ammonium chloride finished product solution. Wherein the step S3 and the step S4 have no sequence. According to the method, electroplating-grade copper sulfate and industrial-grade ammonium chloride products are prepared by using ammonium bicarbonate and realizing full utilization of anions and cations in the acidic etching waste liquid.

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.

The invention discloses a low-viscosity liquid sulfur working medium and a preparation method and application thereof.The low-viscosity liquid sulfur working medium comprises liquid sulfur and at least one doping substance, the doping substance contains sodium sulfide or copper chloride, and the doping substance is preferably sodium sulfide nonahydrate or copper chloride dehydrate; wherein the weight percentage of the sodium sulfide or the copper chloride to the liquid sulfur is preferably 2-10%. The liquid sulfur is doped with metal salts such as sodium sulfide or copper chloride, so that free hydrogen atoms or chlorine atoms occupy the tail end position of chain-shaped sulfur, and the chain segment of long-chain sulfur is broken, thereby reducing the viscosity of the liquid sulfur working medium. Compared with hydrogen sulfide, halogen, organic substances and other dopants with high volatility, the modified sulfur obtained by doping the metal salts has more stable viscosity change and better high-temperature resistance after multiple heat storage and release cycles, the dopant decomposition caused by high temperature is avoided, the doping process is simple, the cost is low, and the method is suitable for industrial production. The large-scale application of the liquid sulfur working medium is favorably realized.

The invention relates to the field of copper plating solutions, and provides a low-stress chemical copper plating solution for a glass substrate and a preparation method of the low-stress chemical copper plating solution. The invention discloses a copper ion carboxyl chelate, which is composed of copper ion carboxyl chelate, 2, 2 '-bipyridine, polyethylene glycol-8000, lauryl sodium sulfate, a sodium carbonate buffer agent, deionized water and a pretreatment solvent, and the copper ion carboxyl chelate is prepared by chelating a polyacrylate-itaconic acid copolymer with copper chloride and then carrying out stepwise cross-linking with epichlorohydrin and N, N'-methylene bisacrylamide. The copper-bis-salicylaldehyde ethylenediamine complex is obtained by reacting bis-salicylaldehyde ethylenediamine with copper acetate, crystallizing and purifying. The preparation method comprises the steps of solvent premixing, chelating activation, staged additive integration, pH dynamic regulation and control and plating solution purification, through nitrogen protection, high-shear stirring and accurate pH regulation, the problems that a traditional chemical copper plating layer is high in stress and poor in conductivity are solved, and the method is suitable for high-precision glass substrate surface metallization.

The invention provides a carbon-supported platinum-cobalt-copper multifunctional alloy catalyst and a preparation method and application thereof, and belongs to the technical field of energy materials. Wherein the nanocarbon carrier solution is mixed with a chloroplatinic acid solution, a cobalt chloride solution and a copper chloride solution, a sodium hydroxide aqueous solution is added to adjust the pH value, ultrasonic dispersion and stirring are performed to obtain turbid liquid, and the molar ratio of platinum ions to cobalt ions to copper ions is 2: (0.5-1): (0.5-1); then, putting the turbid liquid into a reaction kettle, and reacting at 120-250 DEG C for 1-6 hours to obtain a black colloidal solution; then filtering, washing and drying the black colloidal solution to obtain black powder; and finally, carrying out acid treatment on the black powder, and grinding to obtain the carbon-loaded platinum-cobalt-copper multifunctional alloy catalyst. The catalyst is used for catalyzing an oxygen reduction reaction of a cathode in a hydrogen fuel cell and / or a methanol fuel cell, and / or catalyzing a methanol oxidation reaction of an anode in a direct methanol fuel cell.

The invention relates to a preparation method and application of a metal phthalocyanine compound with efficient photothermal conversion capacity. The preparation method comprises the following steps: (1) taking benzophenone, 4-hydroxybenzophenone and the like as initial raw materials, and reacting with 4-nitrophthalonitrile in one step or multiple steps to prepare a phthalocyanine precursor; (2) preparing a green metal copper phthalocyanine compound under solvothermal or solvent reflux with a copper salt (such as copper chloride, copper acetate and the like), and after the preparation is finished, washing the green metal copper phthalocyanine compound for multiple times by using ethanol, deionized water and ethanol; and (3) the green metal copper phthalocyanine compound has good high-heat photo-thermal conversion capacity under xenon lamps, sunlight and simulated sunlight, the preparation method is simple in process and easy for industrial production, and the obtained green metal copper phthalocyanine compound can be applied to photo-thermal materials, light therapy, solar seawater evaporators and the like.

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 relates to the technical field of nano-enzyme preparation and application thereof, in particular to nano-enzyme and a preparation method and application thereof in antibiosis, the nano-enzyme is prepared by using ascorbic acid, sodium hydroxide, copper chloride and cobalt chloride as reaction raw materials and adopting a liquid-phase chemical reduction coprecipitation method, and copper-cobalt nano-enzyme is obtained. The diameter of the prepared nano-material is about 3 nm, the nano-material has good peroxidase-like activity, when a substrate hydrogen peroxide is catalyzed, the Michaelis constant KM is 0.93 mM, the maximum reaction rate Vmax is 12.1862 * 10 <-8 > (M.s <-1 >), the mimic enzyme shows good antibacterial performance on escherichia coli and staphylococcus aureus, the bactericidal effect can be achieved by breaking cell walls, and the mimic enzyme has good application prospects. And the minimum inhibitory concentrations of the compounds are respectively 22.5 [mu] g / mL and 5.63 [mu] g / mL. The nano enzyme is simple in preparation method, low in cost and remarkable in antibacterial effect, and has wide application prospects in the fields of medical industry, chemical production and the like.

The preparation method comprises the following steps: adding sodium hydroxide into a D / L-cysteine ethyl ester hydrochloride aqueous solution to obtain a mixture, carrying out ultrasonic treatment until the solution is clarified to obtain a mixed solution A, and preparing a copper chloride dihydrate aqueous solution for later use; dropwise adding the mixed solution A into a copper chloride dihydrate aqueous solution in a water bath kettle to obtain a mixed solution B, and continuously stirring for reaction; and after the reaction is finished, centrifugally collecting the precipitate, and washing with water and ethanol. A one-pot self-assembly strategy is adopted, self-assembly is driven based on coordination of D / L-Cys.Oet.HCl and Cu < 2 + >, spherical and spiral supramolecular chiral nano-catalysts are constructed, and compared with the spherical and spiral supramolecular chiral nano-catalysts, the spherical and spiral supramolecular chiral nano-catalysts have obvious spatial asymmetry morphology, and have good application prospects. Therefore, the compound has a higher enantioselective catalytic effect on a chiral substrate dopa, and can be used for selectively catalyzing dopa molecules with specific configurations.