100 results about "Copper selenide" patented technology

The invention relates to copper selenide/mesoporous silica core-shell nanoparticles and a preparation method and application thereof. The copper selenide/mesoporous silica core-shell nanoparticles are Cu2<-x>Se/mSiO2-PEG core-shell nanoparticles, where x is 0-1, and m is mesoporous. The preparation method comprises the following steps: preparing a Cu2<-x>Se nanocrystalline, transferring the hydrophobic Cu2<-x>Se nanocrystalline into an aqueous phase through CTAB (Cetyltrimethyl Ammonium Bromide), and growing a mesoporous silica layer on the surface of the CTAB through a sol-gel method by taking the CTAB as a template; and finally, modifying and coupling polyethylene glycol to the surface, and obtaining the copper selenide/mesoporous silica core-shell nanoparticles. The invention also discloses application in preparation of diagnosis and treatment preparations. The obtained Cu2<-x>Se/mSiO2-PEG has extremely low cytotoxicity, so that cancer cells can be effectively killed through light and heat, and the anti-cancer drug DOX can be effectively transmitted into the cells and has pH and laser-sensitive drug sustained release performance, so that a synergistic effect between photothermal therapy and chemotherapy can be realized.

The invention discloses a preparation method of hexagonal copper selenide nanosheets. The preparation method comprises the steps of uniformly mixing copper salt and polyvinylpyrrolidone with a strong alkali water solution to form a solution A; adding selenium powder into the solution A under the magnetic stirring condition, and continuously stirring for 30 minutes to obtain a solution B; performing hydrothermal reaction on the solution B in a hydrothermal reaction kettle at 100-160 DEG C for 1-4 hours; taking out products and cleaning to obtain the hexagonal copper selenide nanosheets. According to the preparation method, copper selenide crystal nucleuses preferentially grow along a crystal surface under the induction effect of polyvinylpyrrolidone molecules by adopting a hydrothermal reaction process and polyvinylpyrrolidone as a surfactant, so that controllable preparation of the hexagonal copper selenide nanosheets is realized. The preparation method has the advantages that the process is simple, the reaction time is short, the operability is good, and a large quantity of hexagonal copper selenide nanosheets can be prepared. The transmission path of photogenerated electrons in the hexagonal copper selenide nanosheets is long, so that the compound probability of photogenerated carriers can be reduced.

The invention relates to a method for preparing a copper selenide nano-material by using Pantoea agglomerans. The copper selenide nano-material with three different stoichiometric ratios is prepared by adjusting the amount of a chemical reducing agent NaBH4 in a solution. When a ratio of n(EDTA-Cu):n(NaBH4) in a working medium solution is not greater than 4-8:1, the product is a Cu2Se nanosphere, and belongs to a tetragonal system, the primary sediment size is 20nm, and the secondary sediment size is 50-100nm; when the ratio of n(EDTA-Cu):n(NaBH4) in a working medium solution is greater than 4-8:1, the product is a CuSe nanosphere, and belongs to a hexagonal system, and the particle size is 100-200nm; and when the solution does not contain NaBH4, the product is a Cu2-xSe nanosphere, and belongs to a cubic system, and the particle size is uniform and is about 80nm. The problems of high cost, large energy consumption and environmental pollution existing in present copper selenide preparation methods are solved in the invention.

The invention discloses a transition metal selenide modified molded demercuration material and a preparation method thereof. The transition metal selenide modified molded demercuration material comprises a molded carrier and an active component loaded on the molded carrier, wherein the active component is a transition metal selenide, and the transition metal selenide is selected from one or more of copper selenide, nickel selenide, zinc selenide or iron selenide. The preparation method comprises the following steps: firmly and uniformly loading a certain amount of a transition metal on the molded carrier by adopting a wet chemical reduction method, and converting the transition metal into the transition metal selenide by adopting an in-situ selenylation method, thereby obtaining the transition metal selenide modified molded demercuration material. The preparation method is simple, the obtained transition metal selenide modified molded demercuration material is large in adsorption capacity, good in mechanical property, fluid property and plasticity, and is suitable for different demercuration application occasions, and the secondary release risk of mercury is reduced.

The invention relates to a copper selenide hollow tubular multi-stage structure material as well as a preparation method and application thereof. A normal temperature ion exchange method is adopted for preparing the copper selenide hollow tubular multi-stage structure material which has great specific surface area and is assembled by ultra-thin nanometer sheets. A scraping coating method is used for manufacturing a counter electrode of a quantum dot sensitized solar cell, and the quantum dot sensitized solar cell of a sandwich structure is assembled. The performance of synthesized Cu<2-x>Se is much higher than that of the conventional Cu2S/brass strip and the conventional Pt counter electrode. Compared with the prior art, the method has the advantages that the defects of expensive equipment, large-area deposition difficulty and the like are avoided; the equipment requirement is simple; the material is suitable for industrial large-scale production, and the like. Meanwhile, the method provides an idea capable of being used as the reference for preparing dye sensitized solar cell counter electrodes made of other materials.

The invention discloses a preparation method and application of a copper selenide nano material based on an eggshell template, and belongs to the technical field of nano materials. The composite copper selenide nano material is prepared by using discarded eggshells as the template, loading copper ions on the surfaces of the eggshells and combining selenium ions in situ to form copper selenide nanoparticles. The preparation method comprises the following steps of eggshell pretreatment; preparation of carrier eggshells; copper ion adsorption; reduction of sodium selenite; in-situ combination ofthe copper ions with the selenium ions to form the copper selenide nanoparticles; preparation of the composite copper selenide nano material loaded on the eggshells. The composite copper selenide nanomaterial has high catalytic degradation performance for organic dyes. The preparation process is simple and easy, a material source is rich, and the catalytic effect is excellent.

This present invention relates to a method of synthesizing copper selenide powder chemical by using a hot-injection method wherein a proper amount of a. reducing agent is added to a mixed solution made of copper cationic solution and selenium anionic solution, and the mixed solution is maintained at a temperature of 230° C. for 40 minutes to obtain Copper Selenide powder. The Copper selenide powder which is in the form of CuSe or Cu_2-xSe, can be synthesized by adjusting the amount of the reducing agent being added to the mixed solution.

The invention discloses a preparation method for a copper selenide film. The method comprises the following steps that an electrolyte is prepared, wherein a selenium-containing compound of a required amount and a copper-containing compound of a required amount are dissolved into water to obtain an initial solution, titration is performed on the initial solution through a proper amount of an acid solution to obtain the electrolyte with the required PH value; the copper selenide film is prepared, wherein a conducting substrate is used as a working electrode, a three-electrode system is adopted, electrochemical deposition is performed on the electrolyte obtained in the first step, the deposition potential is -0/05- -0.5V, and the deposition temperature is 20-90 DEG C. According to the copper selenide film obtained through the electrochemical deposition method, the microgranular structure is evenly distributed in a sheet mode, the obtained copper selenide film can form a PN-junction solar battery structure together with an N-type conductive semiconductor, and the preparation method is simple in technology, low in cost and suitable for industrial production.

Embodiments of the invention are to a copper indium diselenide (CIS) comprising nanoparticle where the nanoparticle includes a CIS phase and a second phase comprising a copper selenide. The CIS comprising nanoparticles are free of surfactants or binding agents, display a narrow size distribution and are 30 to 500 nm in cross section. In an embodiment of the invention, the CIS comprising nanoparticles are combined with a solvent to form an ink. In another embodiment of the invention, the ink can be used for screen or ink-jet printing a precursor layer that can be annealed to a CIS comprising absorber layer for a photovoltaic device.

The invention discloses a copper selenide-polydopamine-graphite phase carbon nitride adsorption-catalysis composite material, and a preparation method and application thereof to pollutant treatment, and belongs to the technical field of photocatalytic materials. Copper selenide is a good semiconductor material, and because of a wide band gap of the copper selenide, sunlight can be better absorbed.Graphite phase carbon nitride has good thermal stability, stable chemical and optical properties, and a large specific area, and the adsorption performance of the graphite phase carbon nitride is increased. The polydopamine has a large number of hydrophilic hydroxyl and amino functional groups, surface charge of the polydopamine can be regulated by protonation and deprotonation, the hydrophilia and an abundant pi electronic system of the polydopamine easily form strong pi-pi accumulation with a benzene ring, and has high adsorption on a compound containing aromatic nucleus, and meanwhile, andthe polydopamine can accelerate separation and transfer of photo-induced electrons and protons, reduce electron-hole recombination and improve the efficiency of a catalytic reaction. Under the same conditions, the copper selenide-polydopamine-graphite phase carbon nitride adsorption-catalysis composite material exhibits higher photocatalytic adsorption property than the copper selenide and copperselenide-polydopamine nanomaterials.

The invention belongs to the technical field of photo-thermal conversion, and particularly relates to a copper-based composite material, a preparation method and application of the copper-based composite material in the field of photo-thermal conversion. The copper-based composite material is a photo-thermal composite material formed by wrapping copper selenide nano ellipsoids with polydopamine, and the thickness of the polydopamine in the copper-based composite material is 5-80 nm. The copper selenide nano ellipsoid serves as a semiconductor material, has a surface plasma resonance effect, and can effectively absorb infrared light and convert light energy into heat energy under the condition of infrared laser irradiation, so that the temperature of the material is increased; the surface of the copper selenide nano ellipsoid is coated with the polydopamine, so that the copper-based composite material is black under the condition of natural light and can efficiently absorb light in the visible light and near-infrared light range, namely, the polydopamine can make up for low light absorption of the copper selenide nano ellipsoid in the visible light range. The composite material can reach a temperature higher than that of the copper selenide nano ellipsoid under the same condition, namely, the composite material has higher photothermal conversion efficiency.

The invention discloses a method for preparing a copper selenide lithium ion battery electrode material, belongs to the field of a selenide lithium ion battery electrode material in functional materials, and aims at solving the problems that an existing method for preparing the lithium ion battery electrode material is expensive in raw material, low in yield, and not beneficial to expanded production. The method comprises the following steps: 1, dissolving Na2SeO3, Cu(CH3COO)2 and NaO into a mixed solvent of ethylene glycol and deionized water, so as to obtain a mixture A; 2, adding diamine to the mixture, so as to obtain a mixed solution B; 3, adding the mixed solution B to a high-pressure reaction kettle and carrying out thermal treatment, so as to obtain a Cu2-xSe electrode material precursor; 4, filtering, washing and drying to obtain the copper selenide lithium ion battery electrode material. According to the method, high temperature is not needed, the used raw material is simple, cheap and available, reaction pressure is small, the obtained Cu2-xSe electrode material is good in degree of crystallization, the purity can be up to over 99%, the yield can be up to 94%, and the expanded production is facilitated.

Disclosed is a nanostructured p-type copper-selenide as a cost-effective thermoelectric material with a high thermoelectric figure-of-merit. The nanostructured copper-selenide is a cost-effective p-type thermoelectric material having a high figure-of-merit of 2 at 973 K and is synthesized employing high energy ball milling process followed by reaction sintering under pressure at high heating rates using spark plasma sintering of the resulting nanopowders. The sintered copper-selenide shows a density of 99.9% of theoretical density and retains the nanoscale features introduced during ball milling leading to a thermoelectric figure of merit of 2 at 973 K.

A process for producing copper selenide nanoparticles by effecting conversion of a nanoparticle precursor composition comprising copper and selenide ions to the material of the copper selenide nanoparticles in the presence of a selenol compound. Copper selenide-containing films and CIGS semiconductor films produced using copper selenide as a fluxing agent are also disclosed.

The invention provides a preparation method and application of a copper selenide nanosheet array for a sodium ion battery with adjustable interlayer spacing. The copper selenide nanosheet array takeshigh-purity copper foil, a selenium source, sodium hydroxide, a strong reducing agent and an intercalating agent as raw materials and water as a solvent to react at 20-80 DEG C for 0.5-4 h, and the copper selenide nanosheet array for the sodium ion battery with the adjustable interlayer spacing is obtained. The copper selenide nanosheet array has the outstanding characteristics that the interlayerspacing of copper selenide is controlled at the low temperature, the preparation method of the material is simple, the energy consumption is low, and industrialization large-scale production is easy;secondly, the copper selenide nanosheet array has good alignment consistency, controllable morphology and high specific surface area. When the material is used as an anode material of the sodium ionbattery, the advantages of high specific capacity, good rate performance and superior cycle performance are shown up. Therefore, the material is expected to be widely used in the fields of sodium-ionbatteries, alkali metal ion batteries, thermoelectric materials and the like.

The invention discloses a preparation method and antibacterial application of a copper selenide nano-material with a near infrared absorption property. The preparation method comprises the following steps: preparing a bovine serum albumin solution with certain concentration and volume; adding a selenium oxide solution with certain concentration and volume into the bovine serum albumin solution anduniformly mixing; then adding a certain amount of ascorbic acid and stirring for 10 to 30min to obtain a solution A; preparing a copper sulfate solution and an ascorbic acid solution, which have certain concentrations and volumes, and uniformly mixing to obtain a solution B; slowly adding the solution B into the solution A; magnetically stirring for 3 to 12h to obtain a copper selenide-protein nano composite solution, wherein the solution has the near infrared absorption property with the wavelength is about 1000nm and has a very good bacterium-inhibition effect on escherichia coli and staphylococcus aureus. The preparation method disclosed by the invention is simple and has moderate reaction conditions and low cost; a product has the near infrared absorption property and has a very goodbacterium-inhibition effect on Gram-positive bacteria and negative bacteria; the product is expected to be applied to the aspects including biomedicines (such as bacterium resistance and photothermaltherapy of cancers), daily chemical cleaning, coating additives and the like.

The invention relates to the technical field of solar cells, and specifically discloses a method for electrochemical etching of the surface of a copper zinc tin sulfide thin film material without water. The method specifically includes the steps of: after placing a copper zinc tin sulfide thin film material in a quartz tube type furnace for selenylation or sulfuration, placing the copper zinc tin sulfide thin film material in an electrochemical workstation, and only connecting a substrate and Mo with a working electrode; preparing a mixed solution of 0.001 to 1M/L anhydrous chloride salt and ionic liquid, the ionic liquid being prepared by mixing choline chloride and urea in a mass ratio of 1 : (0.1~3); and performing heating treatment on the solution, applying an electrical signal, and taking out the solution after treating for 1 to 600 seconds, the electrical signal being any one of a cyclic voltammetry electrical signal, a constant voltage electrical signal, a constant current electrical signal, a pulse voltage electrical signal or a pulse current electrical signal. The method provided by the invention can perform selective corrosion on a copper zinc tin sulfide surface, removes a copper selenide secondary phase (CuxSe) on the surface of the copper zinc tin sulfide thin film, avoids a nonuniform phenomenon brought by absorption layer surface corrosion due to chemical etching in a water solution, is environment-friendly, and is easy to operate.

The invention discloses a core-shell-shaped Cu2Se (at) NiFe-LDH electrocatalyst and a preparation method and application thereof. Firstly, foamy copper is used as a substrate; Cu (OH) 2 nanowires aregrown on the surface of an alkaline medium in situ through a chemical oxidation method; the copper selenide nanowire is converted into a copper selenide nanowire in a tubular furnace by using seleniumpowder, ferronickel hydrotalcite nanosheets grow on the surface of the copper selenide nanowire by adopting an electrodeposition method, and the core-shell-shaped copper selenide and ferronickel hydrotalcite nanosheet electrocatalyst is prepraed by adopting a vapor-phase selenization and electrodeposition two-step. The obtained core-shell-shaped copper selenide and nickel-iron hydrotalcite nanosheet catalyst is in a nanowire shape, and the diameter of the catalyst is 150-250 nm; Cu2Se is used as a core, a NiFe-LDH sheet is used as a shell, and the thickness of the NiFe-LDH sheet is smaller than 10 nm; the oxygen evolution reaction, the hydrogen evolution reaction and the total water splitting catalytic activity of the nickel-iron hydrotalcite nanosheet in a 1mol/L KOH electrolyte solutionare higher than those of nickel-iron hydrotalcite nanosheets and composite materials thereof prepared by other traditional methods.

The invention discloses a Cu2-xSe nanomaterial used as a lithium ion battery electrode material, and a preparation method thereof. The nanomaterial is a sheet nanostructure. The Cu2-xSe nanomaterial is synthesized in a one-step hydrothermal synthesis manner with SeO2 as a selenium source and CuCl2.2H2O as a copper source. The prepared Cu2-xSe nanomaterial has the characteristics of high structuralimpurity, uniform morphology and uneven granularity size. The Cu2-xSe nanomaterial is used as the electrode material to assembly a lithium ion battery, and results of electrochemical performance testshow that the initial specific capacity can reach 345.75 mAh/g and is very close to a theoretic value of 376 mAh/g, and the charge transfer impedance is 1.32 omega/cm<2>. The copper selenide nanoelectrode material has the characteristics of high specific capacitance, low impedance, simple preparation method and low cost.