126 results about "Copper doping" patented technology

The invention discloses a copper doped composite magnetic nano-material and preparation and an application of the copper doped composite magnetic nano-material, and belongs to the fields of magnetic particle synthesis and water treatment research. Aiming at a solvent thermal synthesis process of magnetic nanoparticles, according to the invention, copper chloride and ferric chloride are taken as metal salt precursors, based on solvent thermal reaction, and through copper doping ratio adjustment, the obtained mesoporous Cu-Fe3O4 microspheres have controllable particle size (560nm-120nm), specific surface area (40-100m2 g-1) and surface charge amount, and have the characteristics of high monodispersity, uniform size, high magnetic property (130-65emu g-1) and the like, and show excellent adsorption and regenerative adsorption properties for pentavalent arsenic and trivalent arsenic in a water body. The mesoporous Cu-Fe3O4 microspheres are simple in preparation process, low in cost and high in arsenic adsorption property, can be quickly magnetically separated, and has a good application prospect.

The invention discloses a method for preparing an efficient copper-doped MoS2 nano-sheet array electrocatalyst. The preparing method includes the steps that a 2,300-mesh stainless wire mesh serves as a substrate material, Mo7O24.6 (NH4).4(H2O) and CH4N2S serve as raw materials, and a material is synthesized at the certain synthesis temperature and the certain synthesis time in a water phase system; the efficient electrocatalytic activity of the obtained MoS2 nano-sheet array material is further obtained by doping copper. By means of the method, the product is environmentally friendly, can be prepared in a large-scale mode and has the efficient water electrocatalytic decomposition hydrogen generation performance.

The invention discloses a preparation method of a photoelectrochemical diethylstilbestrol sensor and belongs to the technical field of novel nano functional materials and biosensors. Firstly, a novel two-dimensional nano photoelectric material, namely a copper-doped nano photoelectric material, specifically a two-dimensional nano composite Cu-TiO2 / MoS2 obtained through in-situ compounding of molybdenum disulfide on a copper-doped titanium dioxide nano cube is prepared, and an diethylstilbestrol antibody is loaded and alkaline phosphatase is fixed to the material by the application of good biocompatibility and a large specific surface area of the material. During detection, due to the fact that alkaline phosphatase can catalyze L-ascorbic acid-2-trisodium phosphate AAP to generate L-ascorbic acid AA in situ and then provide an electron donor for photoelectric detection, by the application of the influences of specific quantitative combination of the antibody and an antigen on electron transmission capacity, the photoelectric current intensity is lowered accordingly, and finally the photoelectric sensor for detecting diethylstilbestrol through an unmarked photoelectrochemical method is constructed.

Methods for forming a back contact on a thin film photovoltaic device are provided that include applying a conductive paste onto a surface defined by a p-type absorber layer (e.g., comprising cadmium telluride) of a p-n junction and curing the conductive paste to form a conductive coating on the surface defined by a p-type absorber layer of the p-n junction. The conductive paste can include a conductive material, a solvent system, and a binder such that during curing an acid from the conductive paste reacts to enrich the surface with tellurium while copper is deposited onto the Te enriched surface. The acid is then substantially consumed during curing.

The invention provides a copper-doping MgB2 superconductor and a method for preparing at low temperature. The components and the molecular mass ratio are as follows: (Mg1.1B2)1-xCux, x equals to 0.01-0.10. The preparation method is that: sufficiently mix magnesium powder, copper powder and boron powder according to a ratio in an agate mortar, then make a sheet under a pressure of 2-10 MPa, finally send the sheet into a high temperature difference indication scan calorimetric instrument or a tubular type sintering furnace to carry out low-temperature sintering, the heating rate is 10-40 DEG C / min, keep the temperature and carry out sintering for 2-7 hours when the temperature reaches 490-600 DEG C, then cool the temperature to room temperature at the rate of 10-40 DEG C / min. The analysis indicates that the sintering temperature for preparing the MgB2 superconductor is low and the sintering time is short, thus considerably remedy the defect of long sintering time of a traditional low-temperature sintering method for preparing the MgB2 superconductor, furthermore, the MgB2 superconductor prepared by the method has excellent superconductive performance. Therefore, the copper-doping sintering method is a very potential and practical production method.

The invention belongs to the technical field of new energy materials, and provides a sodium vanadium phosphate electrode material of a vanadium-site copper-doped composite carbon nano tube and a preparation method and application of the sodium vanadium phosphate electrode material. The electrode material is Na<3+x>V<2-x>Cux (PO4)3@5%CNTs, wherein x is equal to 0.01, 0.04, 0.07 or 0.1. Positive bivalent copper ions replace positive trivalent vanadium ions, holes are introduced into NVP unit cells, and the electron conductivity in the material is improved. Meanwhile, an ion transmission channel is widened, the unit cell structure is stabilized, and the ionic conductivity and structural stability of the material are remarkably improved. The carbon nanotubes with high electronic conductivity are compounded to form a layer-by-layer embedded conductive frame, so that the electronic conductivity among the active particles is improved. The intrinsic conductivity and crystal structure stability of the NVP electrode material are comprehensively improved from multiple angles, and the obtained material has excellent rate capability, high rate and long cycle stability when being used as a sodium ion battery positive electrode. The preparation method is simple to operate, easy to control and considerable in yield.

The invention relates to a method for preparing copper-doped activated carbon by utilizing a chemical complexing process, and belongs to the technical fields of chemical industry and environmental protection. The method comprises the following steps of functionalizing nitrile groups of a polyacrylonitrile copolymer serving as a raw material by using hydroxylammonium chloride to obtain a product containing a great number of amino groups and hydroxyl groups, chemically complexing the product and a copper ion aqueous solution to obtain copper-doped polyacrylonitrile, and activating copper-doped polyacrylonitrile under different conditions by using potassium hydroxide as an activator to obtain the copper-doped activated copper. The method has the advantages that polyacrylonitrile is used as the raw material, and the nitrile groups of polyacrylonitrile can be effectively and conveniently functionalized; a chemical complexing method is adopted, so that the activated carbon can be efficiently and uniformly doped with copper; in addition, the method has the advantages of simplicity in an operation process, less environmental pollution and the like; compared with an activated carbon material, the copper-doped activated carbon has high specific capacitance, and can be used for a capacitor electrode material.

Methods for forming a back contact on a thin film photovoltaic device are provided that include applying a conductive paste onto a surface defined by a p-type absorber layer (e.g., comprising cadmium telluride) of a p-n junction and curing the conductive paste to form a conductive coating on the surface defined by a p-type absorber layer of the p-n junction. The conductive paste can include a conductive material, a solvent system, and a binder such that during curing an acid from the conductive paste reacts to enrich the surface with tellurium while copper is deposited onto the Te enriched surface. The acid is then substantially consumed during curing.

The invention provides a method for preparing a transparent supercapacitor with a light enhancement effect. The method comprises the following steps of reacting with foamy copper serving as a substrate of an electrode material to obtain a copper-doped nickel oxide taking a copper oxide array as a substrate to obtain an electrode material of the transparent supercapacitor with the light enhancementeffect; taking foamed nickel as a counter electrode material matrix, taking activated carbon as an active material for uniform coating to serve a counter electrode of a light enhancement effect transparent supercapacitor, taking a sodium ion battery diaphragm as a super capacitor diaphragm, taking a potassium hydroxide solution as a super capacitor electrode solution, stacking the electrode material, an insulating diaphragm and the counter electrode and then putting the electrode material, the insulating diaphragm and the counter electrode into a transparent packaging material, injecting a proper amount of electrolyte and then packaging to obtain and the transparent super capacitor with the light enhancement effect. The supercapacitor with a transparent device is prepared by adopting a super capacitor electrode material with photoresponse, so that the specific capacitance of the supercapacitor is improved and the cycling stability of the supercapacitor is enhanced under the irradiation of sunlight.

The invention relates to a macromolecule resistance type humidity-sensitive element. The element is characterized by comprising a packaging shell, a base body, a humidity-sensitive film, an interdigital electrode and pins, wherein the base body is a humidity-sensitive sensing base body, and the humidity-sensitive film is arranged on the surface of the interdigital electrode and the surface of the base body; the interdigital electrode comprises a transverse electrode and a longitudinal electrode. The organic polymer material is compounded by adopting a multi-layer brush coating technology, resistance of the polymer resistance type humidity sensor in a low-humidity environment is remarkably reduced, sensitive detection on the low-humidity environment is realized, deliquescence resistance of the film is improved by doping cellulose, in addition, precision of silk-screen printing based on a single screen printing plate is relatively low, and cost is relatively low. The element is advantaged in that the pattern of the interdigital electrode is split into the transverse electrode part and the longitudinal electrode part, the preparation precision of the interdigital electrode is improved through the multi-screen separate silk-screen printing technology, the adhesion between the electrode and the substrate is enhanced through copper doping of the conductive ink, and the humidity-sensitive characteristics of high sensitivity, good linearity, high response speed and high reliability are obtained.

The invention discloses a copper-doped activated carbon composite material and a preparation method thereof. The composite material comprises doped element copper and petroleum coke-based activated carbon. The preparation method comprises the following steps: (1) uniformly mixing a copper-containing precursor compound, petroleum coke and an activating agent, and activating; and (2) washing and drying the sample obtained in the step (1) to obtain the composite material. In the copper-doped active carbon composite material prepared by the method, the active metal copper is highly dispersed on the surface of the active carbon in a reduction state, and the combination effect with the active carbon is relatively strong, so the problem of metal falling cannot occur, and the preparation method issimple and feasible.