37 results about "Cuo nanoparticles" patented technology

The invention provides an industrial electrode for synthesizing urea through electro-catalysis C-N coupling and a preparation method and application of the industrial electrode, and belongs to the field of urea synthesizing.The industrial electrode for synthesizing urea through electro-catalysis C-N coupling comprises a conductive substrate and an electro-catalysis material coating the surface of the conductive substrate; the electrocatalytic material comprises a magnesium oxide modified copper oxide catalyst, and MgO nanoparticles and CuO nanoparticles in the magnesium oxide modified copper oxide catalyst are in contact with each other to form a heterostructure. The magnesium oxide modified copper oxide catalyst is used as an electro-catalysis material, MgO nano-particles and CuO nano-particles in the catalyst material are in contact with each other to form a heterostructure, after MgO is introduced, the CO2 adsorption and activation capacity is improved, CO and NHx coupling is promoted, and the urea Faraday efficiency is improved. The industrial electrode shows excellent selectivity and stability in the process of electro-catalytic synthesis of urea.

The invention discloses a preparation method of a CuO-coated N-C electroreduction CO2 catalyst with a multilayer square structure. The method comprises the following steps: dissolving a Cu (NO3) 2 solid in an N, N-dimethylformamide solvent to obtain a solution A, adding terephthalic acid, polyvinylpyrrolidone K10-14 and dodecanoic acid into a reaction kettle, transferring the solution A into the reaction kettle, and adding absolute ethyl alcohol; and heating the reaction kettle in a drying oven, after the reaction is finished, centrifugally collecting a product, and cleaning and drying to obtain the Cu-BDC precursor with a multi-layer square structure. The Cu-BDC precursor is placed in a muffle furnace to be calcined, and the CuO-coated N-C electroreduction CO2 catalyst of a multi-layer square structure can be obtained. According to the method, nanoscale CuO particles can grow on the surface of the Cu-BDC precursor on the basis of retaining the multi-layer square structure of the Cu-BDC precursor, so that CuO plays a catalytic role as much as possible, and the electro-catalytic property of CuO-N-C is improved.

The invention discloses a marine antifouling and anticorrosive coating with copper ion controllable release and self-repairing functions and a preparation method of the marine antifouling and anticorrosive coating, and belongs to the technical field of marine equipment antifouling and anticorrosive coatings. In order to solve the problems that a traditional copper-based antifouling coating is too fast in initial release of copper ions, poor in antifouling persistence, easy to damage and difficult to give consideration to antifouling and self-repairing performance, the preparation method comprises the following steps: firstly, preparing a KH560 modified nano copper oxide / activated carbon antifouling agent; controllable release of copper ions is achieved through the adsorption effect of activated carbon and interface modification of KH560. Secondly, taking PTMG and TDI as raw materials, and introducing FDME and BMI to construct a self-repairing polyurethane matrix containing reversible covalent bonds and hydrogen bonds; finally, the antifouling agent is introduced into the self-repairing polyurethane matrix according to a specific proportion, and the composite coating is prepared. According to the invention, long-acting controllable release of copper ions and synergistic improvement of self-repairing and corrosion resistance of the coating are realized, and the coating is suitable for long-term protection of marine equipment.

The invention relates to the technical field of photocatalysis, in particular to an I-type p-n heterojunction photocatalyst as well as a preparation method and application thereof. According to the photocatalyst, an n-type semiconductor metal organic framework NUS-8 is used as a matrix, a p-type semiconductor CuO is loaded, and an I-type p-n heterojunction structure is constructed. The preparation method comprises the following steps: by taking NUS-8 and cupric salt as raw materials and N, N-dimethylformamide as a dispersion medium, performing coordination anchoring on Cu < 2 + > on the surface of NUS-8 under solvothermal, oxidizing to form CuO nanoparticles, and constructing a coupling interface to obtain the photocatalyst. An energy band of the material is in I-type (straddling type) arrangement, a built-in electric field is formed by Fermi level difference at an interface, directional separation and migration of photo-induced electrons and holes are effectively driven, and the catalytic activity and stability of a photocatalytic reaction are remarkably improved. The material has the advantages of simple and convenient process, stable structure, excellent photocatalytic performance and the like, and is suitable for environment and energy related fields such as photocatalytic CO2 reduction and the like.

The invention discloses a preparation method of tungsten-coated tungsten / copper powder for tungsten-copper slurry, which comprises the following steps: ensuring that copper is uniformly distributed on the surface of tungsten powder by utilizing the charge adsorption effect of nano copper oxide and the tungsten powder, then reducing the nano copper oxide under a hydrogen condition, and improving the binding force of copper and tungsten by utilizing the energy change of a reduction reaction. Then a functional phase material of a tungsten-tungsten / copper structure is prepared through PVD tungsten layer plating, the binding force of tungsten copper and a tungsten layer is improved through heat treatment, segregation of a copper phase in the high-temperature co-firing process is prevented through the tungsten layer with the compact surface, meanwhile, the layering and cracking phenomena of the material after slurry high-temperature sintering can be reduced through configuration of tungsten powder with different granularities, and the material density is improved; and the square resistance is effectively reduced.

The invention belongs to the technical field of electro-catalysis, and particularly discloses a Cu nanoparticle / acidified carbon nanotube catalyst and a preparation method and application thereof.According to the preparation method, acidified pretreated carbon nanotubes with good conductivity and high specific surface area are selected as a substrate, CuO nanoparticles are evenly loaded through a hydrothermal method, and the Cu nanoparticle / acidified carbon nanotube catalyst is obtained; and growing a zeolite imidazate framework material-8 (ZIF-8) on the surface of the CuO nanoparticle-loaded carbon nanotube in situ, and regulating the thickness of an ultrathin nitrogen-carbon layer on the surface and coordination of Cu-N by regulating the calcining temperature and time. According to the Cu nanoparticle / acidified carbon nanotube catalyst as well as the preparation method and the application thereof, the Cu nanoparticles are encapsulated in a confined manner, so that long-service-life electrically-driven CO2 is converted into a high-added-value C2 + product, catalytic active sites of the Cu nanoparticles are fully exposed, the charge transfer rate is increased, and the intrinsic activity of the Cu active sites is improved.

The application discloses a preparation method of an electric contact material and an electric contact, and the preparation method comprises the following steps: adding a graphene oxide dispersion solution into a target dispersion solution to uniformly disperse, so as to obtain a graphene composite material; the target dispersion solution comprises nano copper oxide powder, nano lanthanum oxide powder and a surfactant; the graphene composite material is subjected to removal and reduction treatment, so as to remove the surfactant in the graphene composite material, and a reduced metal composite material is obtained; the metal composite material comprises graphene, copper, copper oxide and lanthanum oxide; the metal composite material is subjected to ball milling treatment, so as to obtain an electric contact composite material containing lanthanum oxide and graphene. According to the embodiment of the application, the lanthanum oxide and the graphene can be uniformly dispersed, so that the electric conductivity and the anti-welding performance of the electric contact material are effectively improved.

The invention discloses a copper-graphite-nanometer copper oxide three-dimensional interface electrical contact material and a preparation method and application thereof, and belongs to the technical field of electrical contact materials.The copper-graphite-nanometer copper oxide three-dimensional interface electrical contact material is prepared from, by mass, 50-60% of small-size spherical copper powder, 0.5-1% of microcrystalline graphite, 0.5-1% of nanometer copper oxide, 0.5-1% of nanometer copper oxide and the balance copper oxide. According to the carbon content, the copper / nanometer copper oxide / graphite composite powder accounts for 5%-6%, the trace alloy elements account for 2%-3%, the balance is the large-size spherical copper powder, D50 of the small-size spherical copper powder is smaller than 1 micrometer, and D50 of the large-size spherical copper powder is 1-30 micrometers. According to the invention, by elaborately designing the spatial distribution and interface state of copper, graphite and nano copper oxide in the microscopic scale, collaborative optimization of conductivity, mechanical strength and arc performance is realized, and the high-performance, low-cost and environment-friendly electrical contact material is obtained.

The invention relates to the technical field of building materials, and discloses an anti-crack high-performance concrete and a preparation method thereof, the anti-crack high-performance concrete comprises an energy synergistic long-acting micro-expanding agent formed by light calcined magnesia modified by a nano copper oxide catalyst; the multi-signal response type self-repairing agent is composed of anhydrous metastable state aluminosilicate glass body powder and slow release type fluoride salt particles. The preparation method comprises the following steps: mechanically co-grinding the two functional components and a part of the cementing material to obtain a functional master batch, and mixing the functional master batch with the remaining materials. Through the synergistic effect of the functional components and the unique preparation process, the drying shrinkage of the concrete is effectively inhibited, and the mechanical property is improved. When cracks are generated, the self-repairing system can be triggered by signals such as moisture to react with the micro-expansive agent in a synergistic manner, and a compact product is generated to effectively block the cracks, so that the durability and reliability of the concrete are remarkably improved, and the technical problem of cracking of concrete materials is solved.

A method of producing hydrogen gas that includes contacting a catalytic MnO2 / MgO / CuO / g-C3N4 nanocomposite with a solution including water and a borohydride source. The catalytic MnO2 / MgO / CuO / g-C3N4 nanocomposite includes 5 to 15 wt. % MgO nanoparticles, 5 to 15 wt. % MnO2 nanoparticles, 15 to 25 wt. % CuO nanoparticles, and 55 to 65 wt. % g-C3N4 nanosheets. The MgO nanoparticles, MnO2 nanoparticles, and CuO nanoparticles are disposed on the g-C3N4 nanosheets.

The invention discloses a polyamide composite material which comprises the following components in parts by weight: 50-100 parts of polyamide resin; 15 to 30 parts of brominated polystyrene; 6 to 13 parts of a flame retardant synergist; 35 to 55 parts of glass fiber; 0.5 to 4 parts of nano copper oxide; and 0.5 to 2 parts of nano zinc oxide. According to the invention, a bromine-antimony flame-retardant polyamide material system is selected, nano copper oxide and nano zinc oxide are added, are dispersed in a material matrix during melt blending modification, can be combined with a polyamide end group, and can absorb and neutralize free acid brought by a flame retardant; meanwhile, nanoscale zinc oxide and nanometer copper oxide form a complexing effect under the double-screw shearing effect, the wear resistance of the material can be remarkably improved, the synergistic flame retardant effect is achieved, the effect of stabilizing a material system is achieved, the metal corrosion resistance of the material is effectively improved, and the service life of the material is prolonged. Therefore, the flame-retardant modified polyamide composite material with both high wear resistance and metal corrosion resistance is realized.

The invention discloses a polyamide composite material as well as a preparation method and application thereof. The polyamide composite material comprises the following components in parts by weight: 75-92 parts of polyamide resin; 15 to 30 parts of brominated polystyrene; 8 to 16 parts of a phosphorus-based flame retardant; 0.2 to 2.0 parts of nano copper oxide; 0.2 to 2.0 parts of inorganic blue toner; and 0.2 to 2.0 parts of inorganic red toner. In a brominated flame-retardant polyamide material system, a phosphorus-based flame retardant is introduced as a flame-retardant synergist, and nano copper oxide is matched with the inorganic blue toner and the inorganic red toner to obtain a black product, so that carbon black powder is effectively replaced, the CTI value of the material is improved while high glow wire performance is obtained, and the flame-retardant polyamide material is suitable for industrial production. The solvent resistance of the system is improved, and the black polyamide composite material with high glowing filament, high CTI value and excellent solvent resistance is realized.

This invention discloses a high-strength, environmentally friendly, antibacterial particleboard and its preparation method, belonging to the field of novel functional artificial board technology. The particleboard utilizes a coordination reaction between 4-vinylbenzoic acid and rare earth lanthanum to construct a rare earth coordinated organic shell layer in situ on the surface of nano-copper oxide. Then, using a mercapto-ene click chemistry reaction, the vinyl-containing core-shell nano-copper oxide is covalently bonded and fixed onto mercapto-modified montmorillonite sheets. Stable liquid antibacterial agents are prepared by reacting these agents with sodium silicate solution and polyethylene glycol solution, respectively, and added to the core and surface particleboard. This not only achieves synergistic antibacterial and anti-leaching effects but also utilizes the alkalinity of sodium silicate to accelerate the curing of diphenylmethane diisocyanate in the core layer, achieving simultaneous curing of the core and surface layers of the board, thus improving the board's performance and environmental friendliness.

The application discloses a method for continuously synthesizing alpha-acetyl-gamma-butyrolactone, which comprises the following steps: vaporizing 1,4-butanediol and then feeding the vaporized 1,4-butanediol into a first fixed-bed reactor filled with a nano copper oxide catalyst doped with Mn, Al, Yb, Sr and Cr to perform a reaction, so as to obtain gamma-butyrolactone gas; continuously feeding the gamma-butyrolactone gas, vaporized acetic anhydride and nitrogen into a second fixed-bed reactor filled with a silver-modified graphene / SiO2 composite catalyst under the protection of nitrogen to perform a reaction, and then performing rectification on a product obtained through multi-stage condensation, so as to obtain a target product. The method provided by the application has stable reaction conditions, high selectivity and specificity of a catalyst and high yield, and can realize continuous production of the product.

The invention relates to a synthesis method and a synthesis processing system of quinclorac oxadiazon, and belongs to the technical field of pesticide synthesizing.The synthesis method comprises the steps that firstly, through mediation of a silane coupling agent, nanometer copper oxide particles are evenly loaded in mesopores of an adsorption type molecular sieve, and then the adsorption type molecular sieve, 3, 7-dichloro-8-quinolinecarboxylic acid and N, N-dimethylformamide are mixed to form the quinclorac oxadiazon. According to the present invention, substances such as N, N-dimethylformamide and the like are subjected to acyl chloride, esterification and transposition rearrangement reactions, the copper oxide nanoparticles in the adsorption type molecular sieve and N, N-dimethylformamide achieve the synergistic effect, and can form the active intermediate with thionyl chloride, such that the activation energy of the acylating chlorination reaction is reduced, and the acylating chlorination reaction time is shortened; the mesoporous structure of the MCM-41 molecular sieve can adsorb hydrogen chloride gas generated in the acylating chlorination reaction in situ through Van der Waals' force and capillary coagulation, the conversion rate of the acylating chlorination reaction is improved, and the in-situ removal of hydrogen chloride can also reduce the use amount of an acid-binding agent triethylamine in the subsequent esterification reaction, so that the generation of triethylamine hydrochloride by-products is reduced, and the material loss is reduced.

The invention belongs to the technical field of selective catalytic reduction, and particularly relates to a copper-cerium nanoparticle catalyst for stabilizing CO-SCR denitration in an aerobic atmosphere and a preparation method of the copper-cerium nanoparticle catalyst. The CeO2-CuO nanoparticle catalyst synthesized through solvothermal reaction can be applied to the field of CO-SCR (selective catalytic reduction). Compared with an existing catalyst, the CeO2-CuO nano-particle catalyst has the advantages that the number of surface active sites is large, richer surface oxygen vacancies are provided, and the CeO2-CuO nano-particle catalyst still has excellent CO-SCR performance in an aerobic environment.

A solid oxide electrolysis cell for high temperature electrolysis of carbon dioxide and a method of making. The cell comprises a solid electrolyte substrate, a separator layer on one side of the solid electrolyte substrate, a cathode on the separator layer, and an anode on the other side of the solid electrolyte substrate. The solid electrolyte substrate material is La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O3(LSGM). The separator layer material is Ce 0.8 Sm 0.2 O 1.9 (SDC). The cathode material is a composite of Sr2Fe 1.5 Mo 0.5 O6(SFM) and Ce 0.8 Sm 0.2 O 1.9 (SDC) with La 0.8 Sr 0.2 Cr 0.5 Mn 0.5 O3(LSCM) or CuO nanoparticles attached to the cathode material. The anode material is a composite of La 0.7 Sr 0.3 Co 0.2 Fe 0.8 O3(LSCF) and Ce 0.8 Sm 0.2 O 1.9 (SDC). The nanoparticles provide additional active sites and sufficient reaction interfaces and gas diffusion channels to effectively promote the reduction of CO2 and help reduce the local carbon concentration and the incidence of carbon deposition.

The invention relates to a method for preparing a bimetallic anti-aging metastable intermolecular compound film based on electrostatic spinning. Comprising the following steps: (1) preparing a polyvinylidene fluoride polymer dispersion liquid; (2) respectively adding nano aluminum and micron nickel into the polyvinylidene fluoride polymer dispersion liquid, dispersing and mixing to obtain a bimetallic mixed precursor liquid; (3) adding nano copper oxide into the bimetallic mixed precursor solution, and mixing to form a bimetallic metastable intermolecular compound polyvinylidene fluoride precursor solution; and (4) carrying out electrostatic spinning on the precursor solution to obtain the bimetallic anti-aging metastable intermolecular compound film. According to the method, while the dispersity of the bimetal metastable intermolecular compound is effectively improved, the bimetal metastable intermolecular compound can be uniformly loaded on the polyvinylidene fluoride fiber to form an energetic composite film, and the energetic composite film has good anti-aging performance; under the condition that the sample is pollution-free and safe, the whole preparation process is simple, the consumed time is short, and the equipment operation difficulty is low.

The invention provides an acetate hydrogenation copper catalyst and a preparation method thereof. The catalyst is prepared through a metal organic framework (MOF) derivation method, a copper-based MOF material is firstly prepared, then porous copper carbide and nano copper oxide species are respectively obtained through carbonization and oxidation steps, and finally a nano copper species with catalytic activity is obtained through reduction to serve as the catalyst. According to the preparation method, the characteristics of high porosity and high specific surface area of the MOF material are utilized, and compared with traditional methods such as a coprecipitation method, an ammonia distillation method and a sol-gel method, the dispersion degree of catalytic active sites is improved, so that the catalytic performance is improved. In the reaction of preparing ethanol through acetic ester hydrogenation, the catalyst realizes high conversion rate and selectivity under relatively mild reaction conditions.

The invention relates to the technical field of sealing element processing, in particular to a heat-resistant and infrared-resistant rubber sealing element and a preparation method thereof. The high-performance silicone rubber is prepared from the following raw materials in parts by weight: 100 parts of silicone rubber, 20-30 parts of fumed silica, 5-10 parts of fluorinated silicone rubber, 3-5 parts of nano copper oxide, 2-4 parts of nano zinc sulfide, 3-5 parts of hexamethyldisilazane, 3-6 parts of hydroxyl silicone oil, 3-5 parts of a heat stabilizer and 0.5-1 part of a peroxide vulcanizing agent, the sealing element prepared according to the formula still keeps excellent elasticity and sealing performance in a long-term high-temperature infrared environment, hardening and cracking are reduced, and the service life is greatly prolonged.

A kit, detection method, and application for detecting oligomeric single-stranded nucleic acids are disclosed. The kit is constructed based on a signal amplification strategy using a copper ion-responsive cyanine dye probe F-0 and copper oxide nanoparticles. MNPs are coupled with biotin-modified oligo1 to obtain MNPs@oligo1; disulfide-modified oligo2 is coupled with copper oxide nanoparticles to obtain CuO@oligo2. In the presence of the target nucleic acid, complementary hybridization occurs with both to form a three-dimensional sandwich structure of MNPs-target sequence-CuO. After magnetic separation and acid hydrolysis, CuO is released. 2+ The reagent is specifically recognized by the cyanine dye probe F-0 and generates a spectral response, enabling rapid detection of target nucleic acids. Using miRNA as a model, the detection limit can reach 1.5 fM. This kit is easy to use, highly sensitive, and has good specificity, making it suitable for the detection of various oligomeric single-stranded nucleic acids, including miRNAs, nucleic acid aptamers, and antisense oligonucleotides.

The invention belongs to the technical field of gas sensors, and particularly relates to a bifunctional covering layer applied to a semiconductor gas sensor and a preparation method of the bifunctional covering layer. The component of the bifunctional covering layer is CuO / Al2O3 composite nanoparticles, the CuO / Al2O3 composite nanoparticles are a nano-porous Al2O3 skeleton and CuO nanoparticles modified on the skeleton, and the molar ratio of the Al2O3 skeleton to the CuO nanoparticles is (9.5: 0.5)-(7: 3). According to the invention, porous Al2O3 is used as an electric insulation framework and a moisture-proof material, CuO nanoparticles rich in oxygen vacancy defects are used as a consumption material of hydrogen sulfide gas, and a dual-function covering layer with moisture-proof and hydrogen sulfide gas filtering functions is constructed, so that the moisture resistance, selectivity and long-term stability of the semiconductor gas sensor are greatly improved. The problems that in the prior art, a hydrophobic molecular sieve is poor in high-temperature thermal stability, and hydrogen sulfide cannot be filtered when the molecular dynamic diameter of target gas is larger than that of hydrogen sulfide are solved.

The invention provides a conductive molecular sieve-CuO-ZrO2 composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of methane electrocatalytic oxidation. The conductive molecular sieve-CuO-ZrO2 composite catalyst comprises a conductive molecular sieve, CuO nanoparticles and ZrO2 nanoparticles, wherein the conductive molecular sieve is composed of a molecular sieve and carbon modified in the molecular sieve, and the CuO nanoparticles and the ZrO2 nanoparticles are located on the conductive molecular sieve. The conductive molecular sieve-CuO-ZrO2 composite catalyst disclosed by the invention can be applied to the methane electrocatalytic oxidation process, is beneficial to providing relatively strong methane adsorption capacity, and promotes the adsorption and activation of methane molecules on the surface of the composite catalyst in the reaction process, so that the yield of ethanol prepared by methane electrocatalytic oxidation is further improved.

The invention relates to the technical field of photochromic materials, in particular to a photochromic material structure and a preparation method thereof.The photochromic material structure comprises a substrate and an N-type semiconductor oxide layer, a photochromic layer and a ceramic layer which are sequentially attached to the substrate, and the preparation method includes the steps that the layers are sequentially prepared on the surface of the clean substrate and then subjected to annealing sintering; the photochromic layer is a film layer of uniformly distributed nanoparticles with a semi-core-shell structure, the shell layer of the nanoparticles with the semi-core-shell structure is a color-changing compound nano silver halide, and the core layer of the nanoparticles with the semi-core-shell structure is a first P-type semiconductor oxide nano cuprous oxide and / or nano copper oxide; the shell layer forms a coating structure for the exposed core layer; the structure comprises at least two PN junctions. According to the preparation method, industrial production can be achieved, component control and a specific space structure of the color-changing functional layer can be well achieved, and the obtained material structure has high photochromic reversibility and high color changing and fading reaction speed.

The invention discloses a bonding process of rubber and a copper piece and application of the bonding process in a sealing piece, and belongs to the technical field of compounding of metal and rubber. The bonding process comprises the following steps that S1, a copper piece is treated through etching liquid, and a micron-sized rough surface is formed; s2, performing electrochemical passivation treatment to generate a nano copper oxide layer; s3, the copper part is cooled in the nitrogen atmosphere after being subjected to high-temperature treatment, the surface of the copper part is coated with an adhesive once, and pre-curing treatment is conducted; and S4, secondary adhesive coating is conducted, rubber formed through extrusion molding of the ethylene propylene diene monomer rubber compound is attached to the coating face, and the rubber and the coating face are placed in a mold to be synchronously vulcanized and cured. The primary adhesive is a mixture of an adhesive containing chlorine groups and ammonium polyphosphate, and the secondary adhesive is an adhesive containing carboxylic acid groups. According to the method, through combination of pretreatment of copper part bonding, proportion gradient design of the adhesive and synchronous vulcanization treatment, chemical bonding and physical anchoring dual enhancement of a copper-adhesive-rubber interface is achieved, and the bonding performance is enhanced.

The invention relates to the technical field of copper oxide dry methods, in particular to a high-purity nanometer copper oxide dry method preparation device and process. The invention provides a high-purity nano copper oxide dry-method preparation device which comprises a base, a reaction furnace is arranged at the upper end of the base, a cover body is arranged at the upper end of the reaction furnace, and an oxygen through opening automatic adjusting mechanism is arranged in the reaction furnace. Through the spraying and circulating system of the sodium hydroxide solution, sulfur dioxide harmful gas generated in the reaction process can be efficiently adsorbed, gas purification treatment is achieved, the adsorption effect is greatly improved through efficient recycling of the sodium hydroxide solution, solution waste is avoided, gas purification continuity and stability are guaranteed, and the product quality is improved. And the risk of environmental pollution is reduced, and the method is environment-friendly and meets the modern environmental protection requirements.

The invention discloses a composite wood modifier as well as a preparation method and application thereof. Relates to the technical field of wood modifiers. The composite wood modifier comprises nano copper oxide, nano zinc oxide, nano aluminum oxide, didecyl dimethyl ammonium chloride and a surfactant. The preparation method comprises the following steps: weighing nano copper oxide, nano zinc oxide and nano aluminum oxide, adding the weighed nano copper oxide, nano zinc oxide and nano aluminum oxide into deionized water, then adding didecyl dimethyl ammonium chloride and ammonium citrate to obtain a suspension, putting the suspension into a magnetic stirrer, stirring for a certain time, and putting into an ultrasonic generator for ultrasonic dispersion. According to the wood modifier, the nanometer copper oxide, the nanometer zinc oxide, the nanometer aluminum oxide and the quaternary ammonium salt are compounded, so that the wood modifier has a remarkable flame retardant effect on wood, and the flame retardant property of the wood can be remarkably improved by delaying ignition time, reducing heat release strength and reducing smoke emission.

The invention relates to the technical field of glazes, and discloses an antibacterial ceramic glaze and a preparation method thereof.The ceramic glaze is formed by ball-milling and mixing bentonite, potassium feldspar, albite, a supported fiber composite material and the like as raw materials, and the supported fiber composite material is prepared by preparing a bridging agent, mixing the bridging agent and the supported fiber composite material in a ball-milling mode. The fiber tourmaline is prepared by loading nano copper oxide on the surface of the fiber tourmaline, in the subsequent ablation process, a large number of silicon-oxygen bonds in a bridging agent structure can form silica sol, the existence of the silica sol can enable the nano copper oxide to relatively slide on the surface of the fiber tourmaline, and then a ball effect is generated; therefore, the wear resistance of a glaze layer formed after the glaze is ablated can be effectively enhanced. Besides, the fiber tourmaline can spontaneously generate and release negative ions, so that the glaze layer is endowed with certain antibacterial performance, and meanwhile, the nano copper oxide has excellent antibacterial activity and can be cooperated with the fiber tourmaline, so that the antibacterial performance of the glaze is greatly improved.

The invention discloses a preparation method and application of an integrated nickel-loaded copper electrode for producing hydrogen through electrocatalysis of formaldehyde. The preparation method comprises the following steps: S1, taking foamed nickel as a working electrode, adopting an electrolyte comprising a copper-containing solvent and an organic additive, and continuously electrifying and depositing copper to obtain an integrated nickel-copper electrode; and S2, cleaning the integrated nickel-copper electrode in the step S1, and carrying out thermal oxidation and reduction to obtain the integrated nickel-loaded copper electrode. Copper with high crystallinity and a compact structure is deposited on the surface of foamed nickel, a copper layer with high crystallinity and the compact structure is changed into nano copper oxide with high roughness and high activity through thermal oxidation, then a copper layer with high activity sites is obtained through reduction, and the prepared integrated nickel-loaded copper electrode effectively reduces hydrogen embrittlement and improves the electrochemical performance of the electrode. And the catalyst is more stable when used for electrocatalytic formaldehyde hydrogen production.

The application discloses a MoO3 modified Co-Ce-CuO core-shell type catalyst, a preparation method and application, and the catalyst comprises an inner core, an intermediate active layer and an outer shell modification layer; the inner core is a solid solution formed by Co3O4 and CeO2; the intermediate active layer is formed by CuO nanoparticles coated on the surface of the inner core; and the outer shell modification layer is MoO3 anchored on the surface of the intermediate active layer; the catalyst obtained by the application has a three-layer structure of the inner core, the intermediate active layer and the outer shell modification layer, and has high CO conversion activity and excellent sulfur resistance stability in a sulfur-containing atmosphere.