114 results about "Cuo nanoparticles" patented technology

The invention discloses a method for preparing a high-efficiency micro heat tube by combining copper powder with copper oxide powder. An evaporation section and a condensation section of the heat tube respectively consist of sintered coppers with different porosities, wherein the evaporation section is formed by sintering micron-sized copper powder, and the porosity is within 40-50%; and the condensation section and a thermal insulating section consist of high-porosity sintered coppers mixed, reduced and sintered by millimeter-sized, micron-sized or nanometer-sized copper oxide powder or copper oxide powder with different particle sizes, and the porosity reaches 60-85%. The low porosity and the small aperture of the evaporation section are convenient to quickly vaporize a liquid-phase medium; and the condensation section and the thermal insulating section use the high-porosity sintered coppers as liquid absorbing cores, so that the liquid-phase reflowing heat resistance is low, liquid quickly flows back to the evaporation section, and the phase change circulation is accelerated. The method respectively injects the needed weights of the copper powder and the oxide copper powder through calculation according to the design requirements of the heat tube to produce the heat tube with different porosities and composite structure; the radiating efficiency is greatly improved, the heat resistance is low, and the quick high-efficiency radiating effect is achieved. The method is easy in operation, simple in equipment, low in production cost and suitable for industrialized production.

The invention discloses a method for manufacturing a micro high-porosity sintered copper heat pipe by using millimeter, micron or nanometer copper oxide powder. The method is similar to that of a conventional sintered copper heat pipe; and the difference is that the method prepares the heat pipe with needed high-porosity sintered copper as a liquid absorbing wick by adding copper oxide powder or copper oxide powder containing particles of different sizes and carrying out the hydrogen reduction and the sintering treatment. The micro heat pipe is generally manufactured by directly sintering the copper powder; and the porosity of the sintered copper liquid absorbing wick is generally 40-50%. The obtained sintered copper porosity of the sintered copper heat pipe manufactured by using the millimeter, micron or nanometer copper oxide powder or the mixture thereof containing particles of different sizes reaches up to 60-80%; and the porosity can be designed as required. The method can increase the backflow speed of a liquid medium in the high-porosity sintered copper liquid absorbing wick, greatly reduce the heat resistance of the medium in the heat pipe in the liquid-steam phase change circulating process, and improve the radiating efficiency. The manufacturing method is simple, free of pollution in the production process, low in cost and suitable for industrial production.

The invention discloses a method for enhancing luminol chemoluminescence by using copper oxide nanoparticles and is characterized in that the method comprises the following steps of: firstly pumping a copper oxide nanoparticle colloid solution and a hydrogen peroxide solution into a mixer for mixing through peristaltic pumps respectively, then mixing with a luminol solution, loading the resulting mixture to a flow cell for reaction, and detecting chemoluminescence intensity by a photomultiplier tube. The copper oxide nanoparticles are added to the luminol-hydrogen peroxide system, so as to significantly enhance chemoluminescence signals. The luminol-hydrogen peroxide-copper oxide nanoparticle flow injection chemiluminescence detection can be applied to glucose content determination, with a linear range of 5 mumol/L to 60 mumol/L.

The invention discloses multifunctional wallpaper which comprises a base layer and a functional layer. The functional layer comprises a first micro-nano composite material and a second micro-nano composite material. The first micro-nano composite material is one or two selected from nano-titanium dioxide and nano-zinc oxide and one or the combination of more selected from nano-agcl, nano-silver oxide and nano-silver and is carried on an inorganic nonmetal micron carrier; and the second micro-nano composite material is one or two selected from nano-titanium dioxide and nano silicon dioxide hydrate and is carried on an inorganic nonmetal micron carrier. The functional layer can preferably comprise a third micro-nano composite material, and the third micro-nano composite material is nano zinc oxide and one or the combination of more selected from nano-copper oxide, nano-copper hydroxide and nano-cuprous oxide. The multifunctional wallpaper has excellent functions of antibiosis, anti-virus, formaldehyde removal, mold resistance, corrosion resistance, pollution prevention and water repellency. A coating composition for the multifunctional wallpaper is further disclosed.

The invention relates to a core-shell-structured nano-zinc oxide coated nano-copper oxide composite antibacterial agent as well as a preparation method and an application. The preparation method comprises the following steps: dissolving copper nitrate and sodium carbonate in water respectively, adding a surfactant in the copper nitrate solution, then dripping the sodium carbonate solution in the copper nitrate solution, reacting and then carrying out centrifugal separation, washing, drying and roasting to obtain black nano-copper oxide; adding the nano-copper oxide in water, stirring, adding zinc nitrate and dissolving the zinc nitrate, dripping ammonia water to adjust the pH value to be about 7 and then obtaining a solid powder, and carrying out centrifugal washing, drying and calcining on the solid powder to obtain nano-zinc oxide coated nano-copper oxide. The nano-zinc oxide coated nano-copper oxide composite antibacterial agent prepared by the method disclosed by the invention has a light colour, can be used for most of household appliances, furniture, wall surfaces and other light-colour areas, and has a high inhibition effect on common bacteria and fungi due to the antibacterial complementary effect of zinc oxide and copper oxide.

The invention relates to a preparation method for nano-copper powders. The preparation method comprises the following steps of: A: preparing nanoscale basic cupric carbonate by a method of precipitation: specifically, preparing a bivalent copper ion solution with certain concentration, then, preparing a precipitant solution with certain centration, starting a spiral channel type revolving bed hypergravity reactor, then, independently injecting two solutions into the reactor from different inlets according to a certain revolving speed to react to cause the two solutions to generate precipitation reaction, and after the reaction is finished, filtering, washing and drying a reaction liquid in sequence; B: carrying out calcination on a dried product to obtain a nanometer copper oxide; and C: reducing the nanometer copper oxide to obtain the nano-copper powders. The preparation method can stably produce the nano-copper powders with even particles on batch, and the produced nano-copper powders have a good application prospect on the aspects, including electric conduction, catalysis, lubrication and the like.

The invention discloses a copper oxide and titanium oxide heterojunction composite catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a copper nitrate solution with an anatase TiO2 spindle body, adding a sodium borohydride reducing agent, regulating and controlling coordination modes and action force of CuO nanoparticles and {101} and {001} crystal surfaces, and selectively depositing the CuO nanoparticles onto {101} crystal surfaces, so as to establish a copper oxide and titanium oxide heterojunction composite catalyst system. In a reaction that methyl formate is prepared from methanol through photo-catalytic oxidation of a catalyst, the conversion rate of the methanol is up to 95% at 25 DEG C, and the selectivityof the methyl formate is as high as 85%. The copper oxide and titanium oxide heterojunction composite catalyst is reasonably established, separation of photoproduction electrons and holes is achievedto the maximum extent under synergism of heterogeneous interfaces, and the reaction activity and the selectivity can be further improved when the methyl formate is prepared from the methanol throughphoto-catalytic oxidation at a low temperature of 15-45 DEG C.

The invention discloses a preparation method and application of a copper oxide/manganese dioxide core-shell nano-cone electrode material. The specific steps include: a. placing the pretreated nickel foam and copper nitrate aqueous solution in a hydrothermal kettle, and React at 160°C for 3‑12h; cool to room temperature, take out the foamed nickel, clean it, and dry it in vacuum; calcinate at 300‑500°C for 2‑6h to obtain the nickel foam supported by one-dimensional nano-copper oxide cones. b. the nickel foam supported by the one-dimensional nano-copper oxide cone prepared in step a and the concentration of 0.01-0.05M potassium permanganate aqueous solution are placed in a hydrothermal kettle, and reacted at 140-170°C for 1-5h; cooling After reaching room temperature, take out the nickel foam, clean it, and dry it in vacuum to obtain a nano-cone electrode material with copper oxide as the core and manganese dioxide as the shell grown on the nickel foam substrate. This electrode is used to assemble supercapacitors, at 0.4Ag ^‑1 Under the current density, its specific capacity is 650Fg ^‑1 ; After 2000 cycles of charging and discharging, its specific capacity remains above 85%.

The invention discloses application of a nano copper oxide/carbon nitride composite material in water bloom control, and belongs to the field of water pollution treatment. Carbon nitride and copper acetate are used as raw materials, NaOH is added to react with copper ions to generate CuOH, then the CuOH is attached to C3N4 and converted into CuO through calcination, and thereby the nano copper oxide/carbon nitride composite material is obtained. Compared with copper and carbon nitride, the nano copper oxide/carbon nitride composite material has the advantages that the algal inhibition performance is effectively improved, and the algal inhibition performance of copper-loaded C3N4 prepared under the optimal copper loading ratio is 4.5 times that of C3N4; the nano copper oxide/carbon nitridecomposite material is stable in performance, and still has good water bloom control capacity in natural water with complex components. In addition, the reusability of the nano copper oxide/carbon nitride composite material prepared by the method is better than that of C3N4; therefore, algae inhibition is realized, and algal toxins can be rapidly removed at the same time.

The invention belongs to the technical field of water pollution photocatalysts and relates to a hollow-structure biomass charcoal/TiO2 multi-wall tube/CuO photocatalyst. The hollow-structure biomass charcoal/TiO2 multi-wall tube/CuO photocatalyst is prepared through compounding hollow-structure biomass charcoal, TiO2 multi-wall tubes and CuO nanoparticles. The invention further discloses a preparation method of the photocatalyst; the preparation method comprises the following steps: pre-treating biomasses through washing, crushing, acid washing and the like; after dissolving the biomasses intoa titanium solution, carrying out ultrasonic treatment for 20 to 40min; drying for 4 to 8h at 40 to 60 DEG C, so as to obtain a titanium source/biomasses; putting the titanium source/biomasses into amuffle furnace and carrying out high-temperature calcination for 2 to 6h; immersing into a copper solution for 3 to 6h; after washing, immersing into a copper solution and washing; after repeating for 10 to 20 times, drying for 10h at 50 to 70 DEG C; finally, carrying out high-temperature calcination for 2 to 4h under the protection of nitrogen gas and naturally cooling to obtain the photocatalyst. The preparation method disclosed by the invention is controllable and has simple reaction conditions; the high specific surface area of the hollow biomass charcoal is combined with the photocatalysis performance of TiO2 and the catalysis performance of CuO, and ammonia nitrogen is efficiently and rapidly removed. Ammonia nitrogen wastewater is removed through experimental simulation and the highest removal rate under the irradiation of ultraviolet rays reaches 99.5 percent.

The invention discloses a preparing method and application of a self-dispersal nanometer copper oxide complexing body, and belongs to the technical field of inorganic nanometer material synthesis. The method comprises the steps that copper acetate and the macromolecule complexing body are dissolved in ethyl alcohol to build an even macromolecule complexing body, the obtained mixed solution is heated until ebullition and added with water dropwise, when the solution turns from green to brownish black, an appropriate alkaline solution is added into the solution dropwise to conduct neutralization, the reaction is conducted for a certain time, and the nanometer copper oxide complexing body is obtained. According to the preparing method, the particle size of a synthetized copper oxide nanometer particle is between 2 nm and 6 nm, the particle has good dispersity in an aqueous solution, the dispersoid is applied to textile finishing without the need of adding adhesive, and the obtained product has excellent and lasting antibiotic property.

The present invention relates to a method for manufacturing copper-based nanoparticles, in particular, to a method for manufacturing copper-based nanoparticles, wherein the method includes producing CuO nanoparticles by mixing CuO micropowder and alkylamine in a nonpolar solvent and heating the mixture at 60-300° C.; and producing copper-based nanoparticles by mixing a capping molecule and a reducing agent with the CuO nanoparticles and heating the mixture at 60-120° C.

According to the present invention, copper-based nanoparticles can be synthesized using CuO, but not requiring any inorganic reducing agent, in a high yield and a high concentration, so that it allows mass production and easy controlling to desired oxidation number of nanoparticles.

The invention relates to a method for preparing nanometer copper oxide by using copper scraps. The method comprises the following steps of: immersing the copper scraps into a chloric acid solution, and extracting a clear copper chloride CuCl2 supernatant; regulating and controlling the copper content of a copper chloride CuCl2 solution to 0.5-10 percent by weight, and controlling the potential pH of hydrogen of the copper chloride CuCl2 solution to 0-2; placing the copper chloride CuCl2 solution obtained from the last step into a reaction tank which contains sodium hydroxide NaOH reaction liquid, regulating the pH value of the sodium hydroxide NaOH, wherein the pH value of end reaction is 9-12, the temperature of the reaction tank is controlled at 60-90 DEG C, and the stirring time of the reaction tank is 0.5-2 hours; filtering and washing black precipitates obtained from the last step, and removing sodium Na and chlorine Cl which are contained in a reactant to obtain black nanoscale copper oxide. The method for preparing the nanometer copper oxide through the copper scraps, which is disclosed by the invention, has the advantages of simpleness, effectiveness, low cost, less pollution and high purity.

The invention discloses a photoelectric material with a CuO nanoparticle modified ZnO nanowire array, preparation and an application. Firstly, a ZnO seed layer film is prepared by adopting a sol-gel method; a ZnO nanowire array is grown on the ZnO seed layer film by adopting a hydrothermal method; and then CuO nanoparticles are adhered on ZnO nanowires by adopting the sol-gel method to obtain theZnO nanowires with the CuO nanoparticles uniformly dispersed on the surfaces. From a microstructure, the composite material has a large specific surface area; the composite material has a large numberof heterojunctions, photon-generated carrier recombination is reduced, and electron-hole pairs are effectively separated, so that the service life and the concentration of carriers are prolonged andincreased; and from physical property fusion, the composite material not only has the light absorption capability of the ZnO nanowires, but also has the light absorption capability of the CuO nanoparticles, is an excellent photoelectric material and has a great prospect in an application to a photoelectric device.