34 results about "Copper(II) acetate" patented technology

A preparation method of a Cu-HHTP-PPy / stainless steel mesh oil-water separation membrane comprises the following steps: depositing polypyrrole on the surface of a stainless steel mesh to obtain a PPy / stainless steel mesh; pPy / stainless steel is subjected to plasma activating treatment and then placed in a copper acetate solution to be soaked, then the PPy / stainless steel is placed in HHTP, and the Cu-HHTP-PPy / stainless steel mesh separation membrane is obtained through electrochemical auxiliary soaking treatment. The Cu-HHTP-PPy / stainless steel mesh oil-water separation membrane prepared by the invention has super-hydrophilicity-underwater super-oleophobicity, also has electrothermal-photothermal properties, has an underwater oleophobic contact angle of 155 degrees, has efficient oil-water separation performance for different oils, has oil-water separation efficiency of 99% or more, also has relatively high permeation flux and excellent cycle stability, and can be applied to the field of oil-water separation. After circulation for more than 30 times, the oil-water separation efficiency still reaches more than 99%, and the permeation flux stably fluctuates in a relatively small range.

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.

This invention discloses a method for preparing Cu@C composite materials for in-situ Fenton oxidation systems and their applications, belonging to the field of inorganic non-metallic materials technology. The method involves placing copper acetate monohydrate in a high-temperature tube furnace, purging the furnace with inert gas, then raising the furnace temperature to 300–450°C at a rate of 4–10°C / min in an inert atmosphere, followed by raising it to above 550°C at a rate of 1–4°C / min, holding the temperature at this point for 0.5–2 hours, and finally cooling it to room temperature to obtain a Cu@C composite material with a "core-shell" structure. This invention utilizes the direct high-temperature pyrolysis of copper acetate monohydrate in an inert atmosphere to obtain a "core-shell" structured Cu@C composite material. Copper acetate plays a dual role as both a Cu and C source, avoiding the disadvantages of the H2 reduction method, such as easy explosion, high cost, and difficulty in large-scale production. This method is simple, safe and controllable, low-cost, green and pollution-free, and can be produced on a large scale. The prepared Cu@C composite material has a large specific surface area, high catalytic activity, and good cycle stability, and can be applied to in-situ H2O2 production and in-situ Fenton catalysis.

This invention discloses a nitrogen-sulfur co-doped multi-chamber carbon-supported copper nanocluster composite material and its preparation method. By integrating polyether F127, 2,6-diaminopyridine, sodium dodecylbenzenesulfonate, fulvic acid, and copper acetate (II), a semi-open and surface-fully embedded copper cluster multi-chamber carbon was successfully constructed. The surface of this multi-chamber carbon is rich in -NH2 and -SO3. ‑ With abundant active groups, it not only boasts a large specific surface area and ample adsorption sites, but also exhibits excellent anti-interference and wide pH adaptability. As an environmentally friendly material, it can simultaneously and efficiently adsorb and remove Cu²⁺ from electroplating wastewater. + Ni² + Pb² + Cd² + It contains heavy metals and organic complexing agents such as ethylenediaminetetraacetic acid (EDTA) and hydroxyethylidene diphosphonic acid (HEDDI). After electroplating wastewater treatment, it achieves convenient solid-liquid separation and recovery through centrifugation and filtration. After acid washing and alcohol washing regeneration, it exhibits excellent cycle stability. With its superior purification efficiency and recycling advantages, it has shown promising development potential in the field of electroplating wastewater treatment.

This invention discloses a bimetallic complex with whitening and anti-aging effects, its preparation method, and its application, belonging to the field of biomaterial preparation technology. The preparation method includes S1, dissolving an amino acid in water to obtain solution A; S2, dissolving a metal salt in ethanol to obtain solution B; S3, mixing solutions A and B evenly, and then reacting them through a solvothermal reaction to obtain solution C; S4, washing and drying solution C to obtain the final product. The amino acid in step S1 is at least one of glutamic acid and aspartic acid; the metal salt in step S2 is copper acetate and zinc acetate, copper acetate and manganese chloride, or copper acetate and cobalt nitrate; the solvothermal reaction conditions in step S3 are: temperature 60-110℃, reaction time 2-48h. The prepared bimetallic complex has both whitening and anti-aging effects, providing a new direction for the application of BioMOFs materials.

The invention relates to the technical field of chemical separation, in particular to a metal organic framework adsorbent and a preparation method and application thereof. The chemical formula of the adsorbent is Cu3 (mtrz) 2 (ox) 2, a coordination structure of a hexa-coordinated octahedron and a tetracoordinated quadrangle is formed by Cu (II) and an organic ligand, and a 3D framework with high-density open metal sites is constructed. The adsorbent is synthesized by stirring at normal temperature by taking copper acetate, 3-methyl-1H-1, 2, 4-triazole and soluble oxalate as raw materials and water as a solvent, and large-scale synthesis and granulation can be realized. The adsorbent has high adsorption capacity and selectivity to CO2 / N2 and CO2 / CH4 systems by virtue of high-density open metal sites, ultramicro channels and a Lewis acid environment, can be used for adsorption separation of a fixed bed and the like, is low in regeneration energy consumption, and is suitable for separation of CO2 in flue gas.

The invention discloses a method for improving the flavor of Maotai-flavor liquor based on a copper material, and belongs to the field of liquor flavor improvement. The copper oxide / activated carbon composite catalyst is prepared from columnar activated carbon and copper acetate; adding copper powder and copper oxide powder into a pottery jar to obtain a pottery jar containing copper; enabling the newly distilled Maotai-flavor liquor to pass through a device containing a copper oxide / activated carbon composite catalyst, then enabling the Maotai-flavor liquor to flow into a pottery jar, and storing and aging the Maotai-flavor liquor to obtain the high-quality Maotai-flavor liquor. According to the Maotai-flavor liquor prepared by the method, defective components such as volatile sulfides are removed, and meanwhile, a plurality of beneficial flavors can be improved.

The invention discloses a nitrogen-doped carbon nanotube material loaded with cobalt and copper bimetals and a preparation method of the nitrogen-doped carbon nanotube material. The method comprises the following steps: adding 2-methylimidazole, cobaltous acetate and cupric acetate into deionized water, ultrasonically dissolving and mixing, standing, washing and drying to obtain a CoCu-ZIF material; and then, calcining the material in a reducing atmosphere, an oxidizing atmosphere and a reducing atmosphere in sequence to obtain the CoCu-coated NCNT material without the carbon film covering metal. Compared with a C / CoCu-coated NCNT material covered with a carbon film and generated only through calcination of reducing gas, in the prepared material, cobalt-copper bimetal active sites are exposed more sufficiently, which means that the usage amount of a catalyst can be reduced on the basis of realizing high catalytic activity, so that the material is more economical.

This invention provides a sheet-like sulfur-containing carbon nitride / tubular copper-doped phosphorus-nitride homo-heterojunction, its preparation method, and its application. The preparation method is as follows: S1. Calcining trithiocyanate to obtain sheet-like sulfur-containing carbon nitride; dissolving copper acetate and melamine in water, then adding concentrated phosphoric acid and stirring until homogeneous, and obtaining a tubular copper-doped phosphorus-nitride precursor using a hydrothermal method; S2. Dispersing the tubular copper-doped phosphorus-nitride precursor and sheet-like sulfur-containing carbon nitride in ethanol or an ethanol-water solution, ultrasonicating, stirring, drying, and then performing a second calcination to obtain the sheet-like sulfur-containing carbon nitride / tubular copper-doped phosphorus-nitride homo-heterojunction. The prepared sheet-like sulfur-containing carbon nitride / tubular copper-doped phosphorus-nitride homo-heterojunction is sensitive to visible light response, has high photocatalytic hydrogen production activity, and the preparation method is simple, easy to operate, and has good reproducibility.

The invention relates to a preparation method of a copper oxide catalyst and application of the copper oxide catalyst in catalytic decomposition of ozone, and belongs to the technical field of catalytic decomposition of gaseous pollutants and environmental protection. The preparation method comprises the following steps: dissolving cupric acetate monohydrate in deionized water to obtain a first solution; dissolving a pH regulator in deionized water to obtain a second solution; dropwise adding the second solution into the first solution, controlling the pH value of the reaction solution, and stirring at normal temperature to obtain a suspension; centrifuging the suspension, washing the obtained precipitate with deionized water until the filtrate is neutral, carrying out suction filtration, collecting a solid phase, and finally drying to obtain a copper oxide precursor; and calcining the copper oxide precursor in an air atmosphere, collecting a solid phase, and sieving to obtain the mesoporous nanosheet copper oxide. The copper oxide is used as an ozone decomposition catalyst, ozone can be efficiently and catalytically decomposed under the conditions of high ozone concentration, high mass space velocity and wide humidity range, and high activity and stability of ozone removal under the high humidity condition are achieved.

The application discloses an anti-sintering methanol cracking catalyst and a preparation method thereof, and belongs to the field of hydrogen production by methanol cracking catalysis. The anti-sintering methanol cracking catalyst comprises the following raw materials in parts by weight: strontium nitrate 1.8-3 parts, titanium nitrate 6.3-10.5 parts, a Cu active carrier 58-70 parts and polyvinyl alcohol 2-5 parts. The Cu active carrier comprises the following raw materials in parts by weight: copper acetate 12-21 parts and a Zr-HAP-P2O7 carrier 51-60 parts. The Zr-HAP-P2O7 carrier comprises the following raw materials in mole fractions: calcium nitrate 19-22 parts, zirconium nitrate 1.8-2.5 parts, ammonium dihydrogen phosphate 18 parts and sodium pyrophosphate 1.4-1.7 parts. The methanol cracking catalyst provided by the application has strong anti-sintering capacity, can effectively prevent the generation of carbon deposition and prolong the service life of the catalyst.

A method for modifying Cu-SSZ-13 catalyst by carbon medium assisted loading of Ce and its application, wherein NH4 + ‑SSZ‑13 or H + ‑SSZ‑13 is added to a copper acetate solution, and after a water bath loaded with copper species, a Cu‑SSZ‑13 filter cake is filtered to obtain the Cu‑SSZ‑13 filter cake. The Cu‑SSZ‑13 filter cake is washed with 0.5 to 1 times the volume of the copper acetate solution and dried. The above-mentioned molecular sieve filter cake powder is then added to the muffle furnace cavity by 10% volume, and calcined at 200 to 400°C in a closed state to obtain Cu‑SSZ‑13 powder. The Cu‑SSZ‑13 powder is immersed in a constant temperature water bath in a cerium nitrate solution, and after impregnation with loaded cerium, it is dried and calcined under an air atmosphere to prepare a Ce‑Cu‑SSZ‑13 catalyst. The inventive method can prepare a low / high temperature, high-efficiency, hydrothermally stable molecular sieve catalyst, which can be used for selective catalytic reduction of NOx in diesel exhaust and NH3‑SCR denitration catalyst. The inventive method is simple to operate and suitable for industrial production.

The invention relates to the technical field of catalysts, in particular to a reverse water gas shift reaction catalyst and a preparation method and application thereof. The preparation method of the reverse water gas shift reaction catalyst provided by the invention comprises the following steps: dissolving a Cu salt and a Co salt in water, adding a TS-1 molecular sieve, stirring, heating in a water bath until water is evaporated to dryness, drying and calcining the evaporated sample, and finally performing reduction treatment to obtain the reverse water gas shift reaction catalyst, wherein the Cu salt is selected from one or more of copper acetate, ethylenediamine tetraacetic acid copper diammonium or copper gluconate, and the Co salt is selected from one or more of cobalt acetate, cobalt acetylacetonate or cobalt disalicylaldehyde ethylenediamine. According to the method, the organic metal salt is uniformly loaded on the TS-1 molecular sieve through a wet impregnation method, and the organic metal salt and the TS-1 molecular sieve interact to form a stable active center with high dispersity, so that efficient conversion of carbon dioxide is realized.

The invention provides a preparation method and application of a porous organic framework film ammonia gas sensor, and the preparation method comprises the following steps: S1, preparing an abietic acid solution, dropwise adding the abietic acid solution into ultrapure water, stirring to obtain a white emulsion, standing, centrifuging, carrying out suction filtration separation to obtain a white solid, and drying to obtain purified abietic acid; s2, dissolving cupric acetate and purified abietic acid in absolute ethyl alcohol according to a preset molar ratio, carrying out ultrasonic uniform mixing treatment, reacting in a constant-temperature oil bath at 55 DEG C for 5 hours, cooling to room temperature, pouring into ultrapure water to separate out a product, and carrying out suction filtration and drying to obtain a copper abietate porous organic framework; and S3, dissolving the copper abietate porous organic framework in dimethyl sulfoxide to prepare a dispersion liquid, sucking 2mL of the dispersion liquid, uniformly dispensing the dispersion liquid to two surfaces of a quartz crystal oscillator, and drying to form the porous organic framework film ammonia gas sensor. The preparation method has the beneficial effect that the porous organic framework ammonia gas sensor which has a high specific surface area, a regular pore structure and specific adsorption sites for ammonia gas can be prepared.

The application discloses a preparation method of N,N-diaryl urea compounds, which couples aromatic amine compounds into N,N-diaryl urea compounds through carbonylation. The application uses formic acid as a carbonyl source, copper acetate as an oxidant, palladium acetate as a catalyst, 1,4-dioxane as a solvent, and performs a reflux reaction at 120 DEG C. The method has good safety and high yield.

The invention discloses a copper-doped high-nuclear-number titanium-oxygen cluster compound as well as a preparation method and application thereof, and relates to the field of materials and photoelectrocatalysis. The method for preparing the copper-doped high-nuclear-number titanium oxygen cluster compound comprises the following steps: 1) adding 3, 5-dimethylbenzoic acid, phenanthroline, cupric acetate and ammonium iodide into a solvent, and stirring to uniformly mix to obtain a turbid liquid; and (2) adding tetraisopropyl titanate and formic acid into the turbid liquid obtained in the step (1), uniformly stirring under sealing, carrying out heat preservation reaction, and after the reaction is finished, carrying out post-treatment to obtain a target product. The preparation method is simple, raw materials are easy to obtain, and industrial production is easy; a template agent or a surfactant is not needed in the reaction process, the raw material cost is low, the post-treatment is simple, the pollution is less, and the green and environment-friendly requirements are met. According to the prepared copper-doped high-nuclear-number titanium-oxygen cluster compound, due to doping of Cu, the high-nuclear-number titanium-oxygen cluster compound has high selectivity, and the Faraday efficiency of the product urea is improved.

The invention discloses a bimetallic complex with whitening and anti-aging effects and a preparation method and application thereof, and belongs to the technical field of biological material preparation, the preparation method comprises the following steps: S1, dissolving amino acid in water to obtain a solution A; s2, dissolving metal salt in ethanol to obtain a solution B; s3, uniformly mixing the solution A and the solution B, and performing solvothermal reaction to obtain a solution C; and S4, washing the solution C, and drying to obtain the product. The amino acid in the step S1 is at least one of glutamic acid and aspartic acid; the metal salt in the step S2 is cupric acetate and zinc acetate, cupric acetate and manganese chloride or cupric acetate and cobalt nitrate; the solvothermal reaction conditions in the step S3 are as follows: the temperature is 60-110 DEG C, and the reaction time is 2-48 hours. The prepared bimetallic complex has a whitening effect and a better anti-aging effect at the same time, and a new direction is provided for application of BioMOFs materials.

The invention discloses humidity response type antibacterial and mildew-proof leather and a preparation method thereof. The method comprises the following steps: firstly, dissolving silver nitrate and quercetin to obtain QC-Ag nanoparticles; secondly, preparing polydopamine nano particles; then copper acetate is dispersed in an ethanol solution, PDA nano-particles are added, ultrasonic stirring and standing precipitation are carried out, precipitates are added into an ethanol solution of sodium hypophosphite, reflux condensation is carried out for 30 min at the temperature of 80 DEG C, and PDA-Cu nano-particles are obtained after alcohol and water alternate centrifugation and drying treatment are carried out. And finally, physically blending the obtained QC-Ag nano-particles and PDA-Cu nano-particles with a polyacrylate emulsion in proportion, and constructing the two nano-composite finishing agents on the surface of leather by adopting layer-by-layer self-assembly, brush coating or magnetron sputtering. The leather coating prepared by the method has a remarkable inhibition effect on growth of aspergillus niger, and particularly has good wet-sensing, antibacterial and mildew-proof properties when the environment humidity changes.

The present invention relates to a method for preparing a copper oxide catalyst and its application in catalytic decomposition of ozone, belonging to the technical field of catalytic decomposition of gaseous pollutants and environmental protection. The preparation method comprises dissolving copper acetate monohydrate in deionized water to obtain a first solution; dissolving a pH regulator in deionized water to obtain a second solution; adding the second solution dropwise to the first solution, controlling the pH value of the reaction solution, and stirring at room temperature to obtain a suspension; centrifuging the suspension, washing the resulting precipitate with deionized water until the filtrate is neutral, collecting the solid phase by suction filtration, and finally drying to obtain a copper oxide precursor; calcining the copper oxide precursor in an air atmosphere, collecting the solid phase and sieving it to obtain mesoporous nanosheet copper oxide. The copper oxide of the present invention, as an ozone decomposition catalyst, can efficiently catalytically decompose ozone under high ozone concentrations, high mass space velocities, and a wide humidity range, achieving high activity and stability in removing ozone under high humidity conditions.

The invention belongs to the technical field of photocatalytic materials, and discloses a method for loading copper oxide quantum dots on the surface of titanium dioxide, which comprises the following steps: coating the surface of TiO2 with carbon quantum dots (CQDs) to form a composite material CQDs / TiO2, and placing the prepared material in a dark environment for more than 24 hours, so that the TiO2 of the CQDs / TiO2 is reversibly converted from hydrophilic to hydrophobic, and the CQDs still maintain the hydrophilic property; in a dark environment, CQDs / TiO2 is immersed in a cupric acetate solution, is rapidly taken out and absorbs a surface solution, so that the solution only exists at a CQDs site; and finally, carrying out air calcination at 400 DEG C through a thermal decomposition method, and cooling to obtain a material structure in which the CuO quantum dots are loaded on the surface of TiO2. The method is suitable for functional modification of materials with fine nanostructures, has significant significance in improvement of photocatalyst performance, and provides a new synthesis thought for design of semiconductor quantum dot heterojunction materials.

This invention discloses a Ti3C2T x / TiO2 / CuO nanocomposite material and a gas sensor based thereon, the nanocomposite material being a multilayer Ti3C2T obtained by etching x The composite material prepared by this invention is prepared by a hydrothermal reaction of a mixed solution of powder and copper acetate. The composite material possesses gas-sensitive properties, based on the constructed Ti3C2T... x The TiO2 / CuO gas sensor features fast response, high sensitivity, good stability, good selectivity, and low detection limit, enabling accurate and rapid detection of ethanol gas.

The invention discloses a CuO / TiO2 (at) SA super-hydrophobic coating and a preparation method thereof.The preparation method comprises the steps that tetrabutyl titanate, NaOH and copper acetate are added into a mixed solution obtained by evenly stirring absolute ethyl alcohol, deionized water and acetic acid to be evenly stirred, a hydrothermal reaction is conducted, cooling, centrifugal washing and drying are conducted, and CuO / TiO2 composite nanoparticles are obtained; and dispersing the CuO / TiO2 composite nanoparticles in an ethanol solution of stearic acid to obtain a colloid, immersing a cleaned pretreated cotton fabric in the colloid, extruding, pulling and drying to obtain the CuO / TiO2 (at) SA super-hydrophobic coating. According to the invention, CuO nanorods and TiO2 nanoparticles are utilized to synergistically construct a rice-shaped micro-nano dual coarse structure, and the rice-shaped micro-nano dual coarse structure and the stearic acid low-surface-energy layer are synergistically acted, so that the surface has self-cleaning capability, and liquid drops can take away dust when rolling down, thereby realizing the integration of multiple functions of self-cleaning, corrosion resistance, ice prevention and the like.

The invention relates to the field of photoelectric energy materials, in particular to an I-doped modified Cu2O composite photocatalytic nitrogen fixation material as well as a preparation method and application thereof.The method comprises the following steps: uniformly mixing a copper acetate solution, a NaOH solution and a glucose solution to obtain a first mixed solution; then, polyvinylpyrrolidone is added into the first mixed solution, heating reaction is carried out, and a reactant S0 is obtained; and finally, adding KI into the reactant S0, and carrying out hydrothermal reaction to obtain the composite photocatalytic nitrogen fixation material. Polyvinylpyrrolidone is used as a surfactant, agglomeration of Cu2O nanoparticles can be inhibited through a steric hindrance effect, and the service life of carriers is prolonged; by doping I, the N2 adsorption energy barrier is reduced, the transfer of photo-induced electrons from a Cu2O conduction band to N2 molecules is accelerated, and electron-hole recombination is inhibited, so that the photocatalytic activity and stability are improved, and the problems of low catalytic activity and poor stability when Cu2O is used as a catalyst for synthesizing ammonia through light nitrogen fixation are solved.

The invention discloses a polyacrylate / PDA-Cu nano composite material as well as a preparation method and application thereof. The method comprises the following steps: dissolving dopamine hydrochloride in a tris (hydroxymethyl) aminomethane aqueous solution, adjusting the pH value to 8.5 by using concentrated hydrochloric acid, and stirring for reaction to obtain the polydopamine nanoparticles. The preparation method comprises the following steps: dispersing cupric acetate in an ethanol solution, adding PDA nanoparticles, carrying out ultrasonic stirring, standing, collecting a precipitate, adding the precipitate into an ethanol solution of sodium hypophosphite, carrying out reflux condensation at 80 DEG C for 30 min, and carrying out alcohol and water alternate centrifugation and drying treatment to obtain the PDA-Cu nanoparticles. And the obtained PDA-Cu nano particles are physically blended with a polyacrylate emulsion. The prepared PDA-Cu nano composite material is simple in preparation process, safe and environmentally friendly, the obtained nano composite material has a remarkable inhibition effect on growth of aspergillus niger, and the moisture permeability of a leather sample after coating is improved.

The application relates to the technical field of catalyst preparation, in particular to a Cu-N-C catalyst and application thereof in glycerol conversion synthesis of lactic acid, which comprises the following steps: step one: copper acetate and 1,10-phenanthroline are added into a solvent for mixing to obtain a mixture, the mixture is heated in an oil bath, and then a template agent is added into the heated mixture for stirring; step two: the solvent in the mixture is removed by rotary evaporation to obtain a mixed solid, and the mixed solid is ground into fine powder after vacuum drying; step three: the fine powder is pyrolyzed under a nitrogen atmosphere to obtain a pyrolysis product; and step four: the pyrolysis product is subjected to acid washing treatment to remove the template agent, and then vacuum drying is carried out to obtain the Cu-N-C catalyst; the problems of poor catalyst stability and high cost of noble metal catalysts existing in the prior art glycerol catalytic dehydrogenation lactic acid synthesis technology are solved.

The invention discloses a Cu3 (MoO4) 2 (OH) 2 material as well as a preparation method and application thereof.The Cu3 (MoO4) 2 (OH) 2 material is synthesized by taking copper acetate and ammonium molybdate as raw materials and adopting a one-step hydrothermal method, the Cu3 (MoO4) 2 (OH) 2 material is of a rod-shaped cluster structure and has a developed pore system, the contact area between the material and an electrolyte is remarkably increased, more oxidation-reduction active sites of molybdenum and copper are exposed, and the oxidation-reduction activity of molybdenum and copper is improved. A sufficient reaction interface is provided for embedding / removing of ammonium ions, a continuous ion transmission channel is formed by multistage pores, and electrolyte infiltration and ion migration are accelerated. Meanwhile, gaps among particles in the Cu3 (MoO4) 2 (OH) 2 material cluster provide a buffer space for volume expansion in the NH4 < + > intercalation / deintercalation process, mechanical stress is reduced, material pulverization or structure collapse is avoided, the cycle stability is remarkably improved, and the problems that an existing water system ammonium ion battery positive electrode material is poor in stability, low in specific capacity and short in cycle life are solved.

The invention discloses a preparation method of single crystal cuprous oxide nano-particles with high crystal quality and capable of accurately regulating and controlling the particle size. The preparation method of the monocrystal cuprous oxide nanoparticles comprises the following steps: irradiating an aqueous solution of cupric acetate by using a main light source and an auxiliary regulation and control light source at the same time to generate the cuprous oxide nanoparticles in situ, the main light source is an ultraviolet light source of 200-400 nm; the auxiliary regulation and control light source is a light source with the wavelength of 300-600 nm. According to the invention, based on a physical regulation and control strategy of dual-light-source synergistic irradiation, on the basis of ultraviolet chemical synthesis, the size and uniformity of the product can be remarkably regulated and controlled only by introducing visible light with a specific wavelength to assist irradiation; the whole process ensures that the original reaction has the advantages of no need of complex equipment, vacuum environment, lengthy reaction time or subsequent annealing treatment and the like, has the characteristics of greenness, environmental protection and process simplification, and realizes effective regulation and control on the size and morphology of the product.

The present invention discloses a long-term stable solar evaporator with an automatic salt removal function, comprising a basswood evaporator. The outer wall of the basswood evaporator is provided with water to be treated. During preparation, lignin is first removed from the wood, 10 mmol of copper acetate and 10 mmol of dimethyltin dichloride are dissolved in 100 ml of DMF solvent, the basswood is placed in the above uniform solution, and Cu²⁺ and Sn²⁺ ions are fully replaced with Na⁺ in the wood. 10 mmol of PTA is added to the above solution for soaking the wood, 10 mL of acetic acid is added, and the mixture is fully stirred and transferred to a 200 mL stainless steel reactor with a polytetrafluoroethylene substrate. The reaction is carried out at 120°C for 24 hours, the wood block is rinsed three times with DMF and then soaked in ethanol for 30 minutes, sulfur powder is placed upstream, the temperature is raised to 600°C in an N₂ atmosphere and maintained for 8 hours, 2 mm is polished off at both ends of the carbonized material to obtain the basswood evaporator, and the mixture is finally collected in a collection container. In this way, a long-term stable solar evaporator with an automatic salt removal function is completed.

The invention relates to the field of catalysts, and discloses a bimetal-doped manganese dioxide and carbon nanotube composite catalyst and an application thereof, the catalyst comprises the following components by mass: 90-110 parts of acidified multi-walled carbon nanotubes; 14 to 62 parts of copper acetate (II) monohydrate; 180 to 220 parts of potassium permanganate; and 28 to 82 parts of cerous nitrate (III) hexahydrate. The composite catalyst with a spatial separation interface structure is prepared by firstly loading a copper source on a multi-walled carbon nanotube and then adopting a dual pH gradient process and a hydrothermal method of injecting a reducing agent in a pulse manner, so that a Cu < + > valence copper species can be contained in an interface region of a copper oxide phase and a cerium element doped alpha-manganese dioxide nanorod; the catalyst provided by the invention has low-temperature oxidation-reduction performance in hydrogen temperature programmed reduction, so that the catalyst shows higher low-temperature activity in catalytic oxidation of volatile organic compounds.

The application discloses a preparation method and application of a Co and Cu co-doped CN-based composite material, and relates to the following steps: after urea is calcined in a muffle furnace, the urea is treated in a constant-temperature oil bath together with a mixed solution containing 1,10-phenanthroline, copper acetate and cobalt acetate; after the solvent is evaporated by heating, pyrolysis is further carried out under N2 atmosphere, so that the Co and Cu co-doped CN-based composite material is obtained. The composite material can be used for activating peroxymonosulfate (PMS) to degrade BPA in wastewater, and the removal effect is excellent, and the removal rate of BPA can reach 97.07% within 15 min.