18 results about "Copper selenide" patented technology

The application provides a copper selenide-halloysite-mannose composite drug delivery system, which comprises a carrier, the carrier is halloysite nanotubes (HNTs), copper selenide nanoparticles (CuSe) are in situ grown on the tube wall of the halloysite nanotubes to form a composite CuSe@HNTs; and mannose is loaded in the lumen of the CuSe@HNTs to form a composite drug delivery system CuSe@HNTs@ME. The application also provides a preparation method and application of the copper selenide-halloysite-mannose composite drug delivery system. The drug delivery system can maintain stability in a gastric acid environment, directly reaches an intestinal inflammation site through an oral route, and significantly reduces intestinal inflammation symptoms.

This invention belongs to the field of composite electrode materials technology, and relates to a method for preparing a NiCoCu selenide composite MXene / carbon sphere thin film electrode material, comprising: first, dissolving ZIF-67 powder in a carbon sphere solution, then adding an MXene aqueous solution, stirring for 1-10 hours, filtering and drying to obtain ZIF-67@MXene / CS; second, preparing a solution according to the proportion of urea, copper source, nickel source and ethanol, immersing ZIF-67@MXene / CS, and reacting hydrothermally to obtain a NiCoCu-LDH@MXene / CS thin film; third, mixing the NiCoCu-LDH@MXene / CS thin film, selenium powder and sodium borohydride in a mass ratio of 0.5-1:1-2:1-2, reacting at 150-180°C for 12-24 hours, washing the obtained product with deionized water and drying to obtain the final product. MXene and carbon spheres together provide a flexible substrate for the self-supporting material, increasing its conductivity and specific surface area. Simultaneously, NiCoCu-Se intercalation into the MXene acts as an intermediate buffer, preventing MXene self-stabilization and making its structure more stable. When applied as the positive electrode material for supercapacitors, the self-supporting material avoids the use of binders, reducing the material's impedance and improving electrochemical performance.

The invention belongs to the field of micro-nano motors, and provides a cell membrane camouflage light-driven nano motor and a preparation method and application thereof. The nano-motor Cu < 2-x > Se-PMO is composed of near-infrared light response copper selenide Cu < 2-x > Se nano-particles and periodic mesoporous organosilicon PMO nano-spheres, and the drug-loaded nano-motor and the cell membrane nano-vesicles are mixed and jointly pass through a microporous filter membrane to obtain the cell membrane disguise nano-motor CM (at) Cu < 2-x > Se-PMO. The nano-motor can actively find a target disease site, the cell membrane camouflage light-driven nano-motor can improve the efficiency and targeting property of drug transportation, and the preparation method has the characteristics of high loading rate, high targeting property, low cost and the like.

This invention discloses a cerium copper selenide (CCuSe2) compound thin film, its preparation method, and its applications. The preparation method includes: S1, mixing a copper source and a cerium source to obtain a cerium copper powder mixture; S2, adding thioglycolic acid and ethanolamine to the cerium copper powder mixture, heating and stirring until the cerium copper powder mixture is completely dissolved to obtain a mixed solution; S3, cooling the mixed solution to room temperature, adding a selenium source to the mixed solution, heating and stirring, reacting until the selenium source is completely dissolved, centrifuging, and obtaining the supernatant as the cerium copper selenide precursor solution; S4, spin-coating and sintering the cerium copper selenide precursor solution to obtain a cerium copper selenide pre-film; S5, subjecting the cerium copper selenide pre-film to high-temperature annealing, and cooling to obtain a cerium copper selenide thin film. This invention marks the first experimental synthesis of the CeCuSe2 compound, which matches the theoretically calculated CeCuSe2 crystal structure. The optical and electrical properties of CeCuSe2 materials were also investigated, confirming that cerium copper selenide thin films can be applied to solar cells and photocatalysis.

The invention belongs to the technical field of photoelectric thin film materials, and particularly relates to a full-spectrum transparent conductive thin film material and a preparation method thereof.The thin film material is of a quasi-continuous homologous nanocrystalline enhanced amorphous composite structure and specifically comprises a transparent substrate serving as an amorphous phase, the chemical component of an amorphous area of the transparent substrate is CuSe < 1 + x >, x is 0.8-1, and the chemical component of the transparent substrate is CuSe < 1 + x >, the components of the whole amorphous region are uniform and present an amorphous structure; the invention relates to a copper-based composite material which is characterized in that the copper-based composite material serves as a conductive reinforcing phase of a crystal phase, a crystal region of the conductive reinforcing phase is composed of nanocrystal grains with a space group of Fm-3m, the chemical component of the nanocrystal grains is CuSe (1-y), and y is equal to 0.4-0.6. According to the invention, a copper selenide material is used as a conductive material, so that the material has good transmissivity in a full spectrum and has the characteristic of high conductivity; the quasi-continuous homologous nanocrystalline composite film is formed by carrying out magnetron sputtering, thermal annealing and other post-treatment methods on a copper selenide target material, and integration of full-wave band transparency and conductivity is achieved.

The application discloses a one-dimensional carbon-coated copper selenide nanowire coaxial heterostructure material, a preparation method and application thereof. The preparation method comprises the following steps: adopting a vacuum chemical vapor transport method to heat and decompose copper acetylacetonate under a sealed condition to form a carbon-coated copper nanowire material, and then performing annealing treatment to obtain a one-dimensional carbon-coated copper nanowire material; and adopting a chemical vapor deposition method to perform selenization on the one-dimensional carbon-coated copper nanowire material by using a selenium source to obtain a one-dimensional carbon-coated copper selenide nanowire coaxial heterostructure material. The one-dimensional carbon-coated copper selenide nanowire coaxial heterostructure material is synthesized by using a vacuum chemical vapor transport and secondary selenization method, and the preparation efficiency is improved. Meanwhile, the one-dimensional structure of the one-dimensional carbon-coated copper selenide nanowire material has a relatively high specific surface area, and the external carbon layer improves the electronic conductivity and stability of the copper selenide, and the one-dimensional carbon-coated copper selenide nanowire material has a relatively high charge and discharge specific capacity.

Provided in the present invention is a composite copper selenide-halloysite-mannose drug delivery system. The drug delivery system comprises a carrier, wherein the carrier is halloysite nanotubes (HNTs), copper selenide (CuSe) nanoparticles are grown in situ on the walls of the halloysite nanotubes to form composite CuSe@HNTs, and mannose is loaded in the lumen of CuSe-coated HNTs to form composite drug delivery system CuSe@HNTs@ME. Further provided in the present invention are a method for preparing the composite copper selenide-halloysite-mannose drug delivery system, and the use thereof. The drug delivery system of the present invention can remain stable in a gastric acid environment and directly reach the site of enteritis by means of oral administration, thereby significantly alleviating the symptoms of enteritis.

The application discloses a modified manganese iron lithium phosphate positive electrode material, a positive electrode sheet, a battery and a preparation method. The modified manganese iron lithium phosphate positive electrode material comprises a manganese iron lithium phosphate base body, a carbon coating layer coated on the surface of the manganese iron lithium phosphate base body and a selenide coating layer coated on the surface of the carbon coating layer. The selenide is selected from a mixture of one or more of copper selenide, cadmium selenide, indium selenide, lead selenide and antimony selenide. The problems of low conductivity, low discharge capacity, poor rate performance, poor cycle retention rate and high manganese dissolution rate of the existing manganese iron lithium phosphate positive electrode material are solved.

The invention discloses a vaginal cancer intelligent targeting nano-tablet based on multistage self-assembly biomimetic mineralization and a preparation method thereof, the vaginal cancer intelligent targeting nano-tablet comprises: an inner core, which is a co-inlay of a drug-loaded metal organic framework (MOF) and a liposome; and high drug loading and synergistic treatment are realized. The middle layer is a mesoporous silica and copper selenide hybrid shell layer formed by biomimetic mineralization; the material is used as a gating and photo-thermal medium. And long-acting circulation and precise targeting are realized. And the outer layer is a cancer cell membrane camouflage layer modified by double ligands of folic acid and hyaluronic acid. And an intelligent nano system with a'core-shell-crown 'three-layer structure is formed. The method has the advantages of complex process, high technical barrier and difficulty in reverse engineering; multiple synergistic effects of chemotherapy, photothermal therapy and immunoregulation are achieved; a triple targeting mechanism: passive targeting, active targeting and homologous targeting; quadruple response release: pH, GSH, enzyme and photo-thermal response; the stability and the biological safety are good.

A hot-dip galvanized coating for iron casting materials and its hot-dip galvanizing method are disclosed. The coating comprises the following raw materials in parts by weight: Mg: 4-6 parts; Al: 3-5 parts; Pb: 6-8 parts; Zn: 90-95 parts; copper selenide: 0.5-1 parts. This application utilizes a typical Mg-Al-Zn system, adding Pb and copper selenide to improve the fluidity of various materials in the galvanizing bath, adapting to the uneven surface of the iron casting material, thereby ensuring its corrosion resistance.

The invention discloses an in-situ composite BiCuSeO-based thermoelectric material and a preparation method thereof, and belongs to the technical field of new energy conversion. The preparation method comprises the following steps: weighing Bi2O3, Bi, Cu, Se and PbO high-purity powder raw materials according to the stoichiometric ratio of BiCu0. 95PbxSe1 + xO (x is greater than 0 and less than or equal to 0.03) by adopting a solid-phase synthesis combined vacuum hot-pressing sintering process, grinding and uniformly mixing, packaging into a quartz tube in vacuum for carrying out high-temperature solid-phase synthesis reaction, grinding an obtained ingot product into powder, filling into a graphite mold, and carrying out vacuum hot-pressing sintering to obtain a high-density block, and the in-situ composite type BiCuSeO-based thermoelectric material is obtained. According to the in-situ composite BiCuSeO-based thermoelectric material prepared by the invention, PbSe can be generated in situ in a matrix, so that the carrier concentration and mobility are effectively improved, and the conductivity and the power factor are optimized; and meanwhile, the in-situ composite PbSe also enables the thermal conductivity to be maintained, so that the final thermoelectric performance is improved. The invention provides a good method for in-situ compounding and performance optimization of the thermoelectric material.

The invention relates to a magnesium battery electrolyte for constructing a negative electrode rich in an inorganic interface and a preparation method. A solute is an electrolyte magnesium salt, a solvent is an organic ether compound, and additives are aniline and piperazine organic compounds; the optimization of the solvated structure not only enhances the migration and diffusion capability of magnesium ions, but also greatly improves the coulombic efficiency, has super-long cycle stability, has high compatibility with a copper selenide positive electrode, remarkably improves the oxidation-reduction stability of an electrolyte system, and is suitable for large-scale production. And a key material basis is provided for constructing a magnesium ion battery with high energy density and long cycle life.

This invention relates to a single-layer Cu 2 / 3 Na 1 / 3 This paper describes a method for preparing copper (Se) materials, belonging to the field of nanomaterials technology. The method involves preparing a copper single-crystal substrate; evaporating and depositing selenium powder onto the copper single-crystal substrate to obtain the substrate and a copper-selenium compound deposited on it, controlling the temperature of the copper-selenium compound and the copper single-crystal substrate at 25–30°C during the deposition process; heating the substrate and the deposited copper-selenium compound to the growth temperature and holding them thereafter; then evaporating and depositing elemental sodium onto the substrate and the copper-selenium deposit to obtain a sodium-doped copper selenide deposit and the substrate, controlling the temperature of the substrate and the deposit at 25–30°C during the deposition process; and finally, holding the obtained sodium-doped copper selenide deposit and the substrate at room temperature to obtain a large-area monolayer of Cu. 2 / 3 Na 1 / 3Se material. The large-area monolayer Cu prepared by this invention... 2 / 3Na 1 / 3 Se materials have a two-dimensional network structure with an area greater than 250 square nanometers and uniformly oriented atoms.

The invention discloses a cerium-copper-selenium compound film and a preparation method and application thereof.The preparation method comprises the steps that S1, a copper source and a cerium source are mixed, and a cerium-copper powder mixture is obtained; s2, thioglycollic acid and ethanolamine are added into the cerium-copper powder mixture, heating and stirring are conducted till the cerium-copper powder mixture is completely dissolved, and a mixed solution is obtained; s3, cooling the mixed solution to room temperature, adding a selenium source into the mixed solution, heating and stirring, reacting until the selenium source is completely dissolved, and centrifuging to obtain supernate, namely a cerium-copper-selenium precursor solution; s4, spin-coating and sintering the cerium-copper-selenium precursor solution to obtain a cerium-copper-selenium prefabricated film; and S5, performing high-temperature annealing on the cerium-copper-selenium prefabricated film, and cooling to obtain the cerium-copper-selenium film. A CeCuSe2 compound is synthesized on an experiment for the first time, the CeCuSe2 compound is matched with a CeCuSe2 crystal structure calculated theoretically, meanwhile, the properties of a CeCuSe2 material in the aspects of optics and electricity are explored, and it is proved that the cerium-copper-selenium film can be applied to the fields of solar cells and photocatalysis.

The invention relates to an impurity removal agent for deeply removing silver from an electrolyte prepared from high-purity copper, application of the impurity removal agent and a method for deeply removing silver from the electrolyte, and belongs to the technical field of metallurgical engineering. The impurity removal agent is a copper selenide, a copper telluride or a mixture of the copper selenide and the copper telluride. The silver removal method comprises the following steps: adding the impurity removal agent into the electrolyte according to the ratio of the total molar weight of selenium and tellurium to the molar weight of silver being (1: 1)-(500: 1), reacting for 1-6 hours under the conditions of 25-95 DEG C and 400-800 rpm, standing, and sequentially separating through filter cloth (20-38 microns) and a fine filter (0.1-10 microns) to obtain a purified solution. According to the method, the silver content of the electrolyte can be deeply removed to 0.01 mg / L or below, new metal impurities are not introduced, the process is simple and efficient, and the method is suitable for industrial purification production of a copper sulfate or copper nitrate system.

The invention belongs to the technical field of lithium metal batteries, and discloses a copper selenide / cellulose fabric composite current collector of a high-performance lithium metal battery and a preparation method of the copper selenide / cellulose fabric composite current collector. The method comprises the following steps: carrying out silanization treatment, polymerization reaction, catalyst adsorption and chemical copper plating reaction on a cellulose fabric to obtain a copper-plated fabric; and then reacting the copper-plated fabric with selenium powder through chemical vapor deposition to obtain the copper selenide-loaded cellulose fabric current collector. The current collector provided by the invention has a three-dimensional conductive skeleton structure, has high conductivity and excellent lithium affinity, and can effectively reduce lithium nucleation overpotential, guide uniform deposition of lithium ions and inhibit formation and growth of lithium dendrites, thereby improving coulombic efficiency and cycling stability of a lithium metal battery.

The application discloses a preparation method and application of a copper selenide polyoxometalate nanocluster, relates to the technical field of biological nanomaterials, and comprises the following steps: dissolving ammonium molybdate tetrahydrate in ultrapure water to obtain an ammonium molybdate solution, dissolving copper chloride dihydrate in ultrapure water to obtain a CuCl2 solution, mixing the ammonium molybdate solution and the CuCl2 solution to obtain a mixed solution, dropwise adding an ascorbic acid solution into the mixed solution obtained in the previous step, continuing to stir and react after the dropwise adding is completed, loading the obtained Cu-POM crude solution into a dialysis bag, performing freeze-drying treatment on the Cu-POM solution after dialysis is completed, obtaining a Cu-POM powder product, preparing a Cu-POM solution with a concentration of 0.8-1.2 mg / mL and mixing the solution with a solution at a volume ratio of 1:1, loading the obtained Cu-Se-POM crude solution into a dialysis bag after the reaction is completed, and performing freeze-drying treatment on the Cu-Se-POM solution after dialysis is completed, to obtain a Cu-Se-POM powder product. Compared with a preparation method of a traditional polyoxometalate doped material, the preparation efficiency is high, the raw material cost is low, and the preparation method is environment-friendly.

The invention discloses a target material for a thin-film solar cell and a preparation method and application thereof, and the preparation method comprises the following steps: weighing a binary copper-selenium compound as a raw material according to the stoichiometric value of Cu < 2 + > aSe < 3 + > b (-1 < = a < = 0.5,-2 < = b < = 0.5); performing pretreatment to obtain pretreated powder; the pretreated powder is subjected to hot pressing sintering treatment under the inert atmosphere, the sintering temperature of hot pressing sintering treatment ranges from 600 DEG C to 850 DEG C, the sintering pressure ranges from 20 MPa to 50 MPa, the sintering time ranges from 1 h to 5 h, and the copper-selenium target material is obtained; the binary copper selenium compound is selected from one or more of cuprous selenide, tricopper diselenide, copper selenide and copper diselenide. By accurately controlling the stoichiometric ratio of the elements, the copper-selenium target material with controllable components can be prepared, meanwhile, the preparation process is simple, the preparation cost is low, large-scale process production is facilitated, in addition, the density of the obtained copper-selenium target material is larger than 95%, and high uniformity and high density of the copper-selenium target material can be achieved at the same time.