80 results about "Copper doping" patented technology

The invention provides a ratiometric fluorescence sensing system and a preparation method and application thereof, and the preparation method comprises the following steps: respectively preparing a silicon oxide-based aggregation-induced emission material and a copper-doped carbon dot material, and mixing the silicon oxide-based aggregation-induced emission material and the copper-doped carbon dot material with an ascorbic acid-2-phosphoric acid material to construct the ratiometric fluorescence sensing system. The fluorescent probe is applied to ferric ion detection, in-vitro detection of biomarkers or fluorescence imaging. The technical scheme provided by the invention has good stability, accuracy and practical application potential.

The invention belongs to the technical field of iron ion detection, and particularly relates to a rapid detection method for ferric ions in water, which comprises the following steps: a fluorescent probe preparation step: taking trihydrate of copper nitrate and tryptamine, adding into a centrifuge tube in sequence, adding ultrapure water, performing ultrasonic dissolution, transferring into a high-pressure reaction kettle, and performing hydrothermal reaction to obtain a fluorescent probe; cooling to room temperature, centrifuging the obtained yellow green solution in a centrifugal machine, and filtering the supernate through a microfiltration membrane to obtain a copper-doped carbon quantum dot CuCDs stock solution, namely the fluorescent probe; analyzing and determining Fe < 3 + >: taking the diluent of the prepared CuCDs solution, adding the diluent into a centrifugal tube containing a Fe < 3 + > standard solution, uniformly mixing, carrying out fluorescent quantitative analysis and detection, and exploring the change rule of the fluorescence intensity ratio of CuCDs; according to the rapid detection method for Fe < 3 + > provided by the invention, the synthesized CuCDs have high sensitivity, can realize on-site rapid detection of Fe < 3 + > in a water medium, and shows a wide application prospect in the field of environmental monitoring.

The invention provides the preparation method of the efficient photocatalyst which is simple and convenient, does not contain noble metals or toxic metals and does not need a cocatalyst. In the invention, a strategy for synergistically improving the catalytic performance by regulating and controlling sulfur vacancies and doping copper ions is provided, zinc indium sulfide (ZIS) is selected as a substrate material, the content of sulfur atoms is increased in the synthesis process through a solvothermal method to introduce the vacancies, and Cu (NO) is synchronously added to introduce Cu, so that the catalytic performance is improved. The Cin-VZIS catalyst is successfully prepared (n is a doping proportion relative to Zn). A TEOA aqueous solution is used as a sacrificial agent to carry out photocatalytic hydrogen production reaction, the synergistic effect of the two modification modes can significantly improve the performance of the catalyst, and when the copper doping ratio is 1.5%, the catalytic activity reaches the highest and is 1.799 mmol.g.h, which is 7.5 times of that of an original ZIS catalyst. The prepared catalyst is high in activity and good in stability, and a new way is provided for developing efficient and stable solar hydrogen production materials.

The invention discloses a high-conductivity phosphorus-copper alloy and a surface treatment process thereof, and relates to the technical field of copper alloy surface treatment.The surface treatment process comprises the specific steps that after the phosphorus-copper alloy is cleaned, sand blasting treatment is conducted, then a composite coating is coated, and pyrolysis annealing is conducted to obtain a middle layer; coating an epoxy composite coating on the surface of the middle layer, and curing at 40-45 DEG C for 20-24 hours to form a surface layer; wherein the composite coating is prepared from the following raw material components in parts by mass: 5 to 8 parts of phosphorus-copper doped molybdenum disulfide, 1 to 3 parts of copper powder, 0.2 to 3 parts of metal salt, 20 to 30 parts of aniline tripolymer derivative and 60 to 80 parts of N, N-dimethylformamide; the epoxy composite coating comprises the following raw material components in parts by mass: 80-100 parts of epoxy resin, 1-3 parts of modified MXene, 1-3 parts of phosphorus-copper doped molybdenum disulfide and 60-75 parts of a curing agent.

The invention provides a copper-doped and coated sodium electric precursor as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out first coprecipitation reaction on a mixed metal salt solution, a precipitator solution and a complexing agent solution; the mixed metal salt solution comprises nickel ions, iron ions, manganese ions and copper ions; after the first coprecipitation reaction is finished, the pH value of the system is increased, a copper coating preparation stage is started, a second coprecipitation reaction continues to be carried out, after the second coprecipitation reaction is finished, the mixed metal salt solution is replaced with a copper salt solution, the pH value of the system is reduced, a third coprecipitation reaction continues to be carried out, and the copper-doped and coated sodium electric precursor is obtained. According to the preparation method, micro particles are introduced in the coating preparation stage, Cu < 2 + > is brought into a particle system in the stage that large particles adsorb the micro particles to grow, uniform coating is achieved, and finally the precursor which is uniform in element distribution, uniform in structure distribution, high in tap density, high in specific surface area and free of hardening is obtained.

The invention belongs to the technical field of solar cells, and particularly relates to a preparation method and application of a copper-doped cadmium telluride thin-film solar cell. The preparation method of the copper-doped cadmium telluride thin-film solar cell comprises the following steps: preparing a transparent conductive layer, a window layer, an absorption layer and a back contact layer on a transparent substrate in sequence, then soaking the transparent substrate in a copper salt solution, then preparing a back electrode layer on the side of the back contact layer, and carrying out annealing treatment. According to the invention, copper doping is realized based on a soaking method, and hole transport efficiency can be improved, energy band matching can be optimized and interface recombination loss can be reduced by controlling the concentration, the type and the soaking time of the copper salt solution, so that the solar cell has good open-circuit voltage, short-circuit current and filling factors, relatively high conversion efficiency can be realized, and the conversion efficiency can reach 19.62%. Meanwhile, the preparation process is simple and can be completed in the atmospheric environment, and compared with a traditional process, the annealing temperature is low, so that the preparation cost is low.

The invention belongs to the technical field of photocatalysts, and particularly relates to copper-doped graphite phase carbon nitride and a preparation method thereof.The preparation method comprises the following steps that A, cyanuric acid is dissolved in water, and a cyanuric acid solution is obtained after stirring; dissolving a chelating agent and copper salt in water, and stirring to obtain a copper source solution; the preparation method comprises the following steps: dissolving melamine in water, and stirring to obtain a melamine solution; b, adding the cyanuric acid solution into the copper source solution, and stirring to obtain a cyanuric acid-copper precursor solution; adding a melamine solution into the cyanuric acid-copper precursor solution, and stirring to obtain a self-assembled supramolecular precursor solution; c, sequentially centrifuging, washing and drying the self-assembled supramolecular precursor solution to obtain a self-assembled supramolecular precursor; and D, carrying out flash evaporation treatment on the self-assembled supramolecular precursor to obtain the copper-doped graphite phase carbon nitride. According to the copper-doped graphite phase carbon nitride and the preparation method thereof, the photocatalytic performance and the photocatalytic stability of the copper-doped graphite phase carbon nitride can be improved.

The invention discloses a mixed valence copper doped bismuth vanadate nanodisk photocatalyst and a preparation method and application thereof, a main body of the catalyst is a bismuth vanadate nanodisk, copper is doped in the bismuth vanadate nanodisk, and the copper is composed of Cu < + > and Cu < 2 + >; the catalyst has the characteristics of high stability, simplicity in implementation, high universality and the like. The doped copper ions not only can improve the light absorption capacity of the bismuth vanadate material, but also can promote the rapid separation of photo-induced electrons and holes of the bismuth vanadate material by virtue of the mixed valence state of the copper ions, and improve the carrier dynamics on the material, so that the photocatalytic efficiency of the bismuth vanadate material is improved. The bismuth vanadate photocatalyst doped with the copper ions in the mixed valence state has an efficient photocatalytic degradation effect on pollutants such as rhodamine B and the like, and has a wide application prospect in the technical aspects of environmental pollutant degradation and green advanced oxidation.

The invention relates to the technical field of waste battery treatment, and particularly discloses a physical recovery method of a negative electrode material in a waste pole piece, and the method comprises the following steps: S1, heating pretreatment; s2, tearing the whole pole piece in a coarse crushing manner to preliminarily separate negative electrode powder, and then separating the negative electrode powder and copper foil powder in a fine crushing manner; s3, sorting: respectively collecting powder and copper foil; s4, adjusting particle size distribution of the particles in a processing mode, and repairing surface defects of the particles; and S5, performing micro-pressure calcination to realize Cu doping of the residual trace copper foil in the negative electrode material. A physical method is adopted for processing and treatment in the whole process, the recovery rate of the negative electrode material and the copper foil is larger than 98%, the content of doped copper accounts for 0.2%-0.5% of the mass of the negative electrode material, residual trace copper doping is achieved, the conductivity of the final negative electrode material can be improved by 22% or above, the first coulombic efficiency is higher than 92%, the recovery process is energy-saving, environment-friendly and convenient to operate, and the method is suitable for industrial production. And the method is suitable for recycling and processing most of the negative pole pieces of the CMC system.

The invention relates to the technical field of cadmium telluride power generation glass, in particular to a copper-doped back contact layer, a preparation method of the copper-doped back contact layer and cadmium telluride power generation glass. The preparation method of the copper-doped back contact layer comprises the following steps: firstly preparing the back contact layer, then preparing a copper paste dot matrix on the back contact layer, and finally carrying out two-stage heat treatment, the first-stage heat treatment temperature of the two-stage heat treatment is 180-220 DEG C, and the second-stage heat treatment temperature of the two-stage heat treatment is 250-300 DEG C. According to the preparation method, an intrinsic zinc telluride (i-ZnTe) buffer layer is introduced and combined with a dot-matrix copper doping technology, and a super-stable back contact structure which is gently transited in energy band, extremely low in interface recombination and strictly limited in Cu ions is constructed between the CdTe absorption layer and the metal back electrode, so that the cadmium telluride power generation glass which is higher in efficiency and longer in service life is prepared.

The invention provides a copper-doped cadmium zinc sulfide / chromium-doped bismuth vanadate hollow sphere composite photocatalyst, a preparation method thereof and application of the photocatalyst in hydrogen production by water decomposition. The material is prepared by the following method: (1) preparing copper-doped zinc cadmium sulfide nanoparticles by using a hydrothermal method; (2) preparing chromium-doped bismuth vanadate hollow spheres by using a hydrothermal method; and (3) modifying the copper-doped cadmium zinc sulfide on the surface of the chromium-doped bismuth vanadate hollow sphere to obtain the copper-doped cadmium zinc sulfide / chromium-doped bismuth vanadate hollow sphere composite photocatalyst. The copper-doped cadmium zinc sulfide / chromium-doped bismuth vanadate hollow sphere composite photocatalyst prepared by the invention is easy to synthesize, wide in raw material source and high in catalytic activity and stability, and in a photocatalytic hydrogen production test, the photocatalytic hydrogen production amount within 3 hours can reach 49.1 mmol.g <-1 >.

The invention belongs to the technical field of new energy materials, and relates to a preparation method for preparing a copper-doped carbon nanofiber coated cerium-doped manganous oxide composite material serving as a high-cycle-stability zinc positive electrode of an aqueous zinc ion battery by combining an electrostatic spinning method and high-temperature annealing.

Methods of fabricating nanocrystals are disclosed. Such methods may include providing copper sulfide core nanocrystals and providing a lead precursor. Moreover, the copper sulfide core nanocrystals may be reacted with the lead precursor to generate copper doped lead sulfide nanocrystals. Related nanocrystals and optoelectronic devices are also disclosed.

This invention provides a method for preparing a long-cycle-life composite sodium iron pyrophosphate cathode material, comprising: adding perfluorophthalocyanine copper during a co-precipitation reaction to prepare a copper-doped composite sodium iron pyrophosphate precursor; dispersing the copper-doped composite sodium iron pyrophosphate precursor in a perfluorophthalocyanine copper solution, performing solid-liquid separation, vacuum drying, and pre-calcining to obtain a primary doped precursor; mixing a sodium source, a carbon source, and the primary doped precursor, milling the resulting slurry, and then spray drying to obtain a doped and modified precursor; and sintering the doped and modified precursor to obtain the long-cycle-life composite sodium iron pyrophosphate cathode material. This invention achieves doping and interface modification through perfluorophthalocyanine copper, simultaneously realizing a carbon-coated stable structure to improve the electronic and ionic conductivity of the material, significantly enhancing specific capacity, rate performance, and cycle stability.

The invention belongs to the technical field of nano composite material preparation, and relates to a composite electrode material, in particular to a preparation method of a copper-doped bismuth selenide / carbon dot (CuxBi2-xSe3 / CDs) composite material, which comprises the following steps: sequentially adding an ethylene glycol solution of a copper salt, a bismuth salt and sodium selenite into a carbon dot dispersion liquid, uniformly dispersing, adding a reducing agent, and uniformly stirring to obtain the copper-doped bismuth selenide / carbon dot / CuxBi2-xSe3 / CDs / CuxBi2-xSe3 / CDs / CuxBi2-xSe3 / CDs composite material. And transferring the mixed system into a high-pressure reaction kettle, carrying out solvothermal reaction at 140-200 DEG C for 10-20 hours, carrying out centrifugal separation, washing the precipitate with an organic solvent and deionized water in sequence, and freeze-drying to obtain the product. The copper-doped bismuth selenide / carbon dot composite electrode material is prepared by utilizing a one-step solvothermal method and adjusting factors such as the use amount of the carbon dots and the reaction temperature, and shows excellent electrochemical lithium storage performance when being applied to a negative electrode of a lithium ion battery. The operation process is simple and easy to implement, the reaction efficiency is high, and large-scale production and industrial implementation are easy.

The present application belongs to the technical field of comprehensive recycling of non-ferrous smelting slag, and particularly relates to a method for simultaneously floating and separating and recycling elemental sulfur and zinc sulfide from high-sulfur slag, which specifically comprises the following steps: (1) adding copper sulfate to high-sulfur slag slurry for microwave treatment, then adding hydrogen peroxide for heating treatment, and standby; (2) obtaining sulfur concentrate by floating the high-sulfur slag slurry obtained in step (1), and separating elemental sulfur and zinc sulfide by extracting the sulfur concentrate; the method promotes copper doping on zinc sulfide particles by microwave, improves the floating capacity of zinc sulfide, simultaneously floats and recycles elemental sulfur and zinc sulfide by adding xanthate collector during floating, and finally separates elemental sulfur and zinc sulfide by extraction; the method realizes efficient and high-grade recovery of sulfur and zinc sulfide at the same time, and provides comprehensive utilization of resources.

The invention provides a solar cell based on a Cu-doped lead-copper alloy perovskite light absorption layer and a preparation method of the solar cell, and the light absorption layer of the solar cell is a Cu-doped lead-copper alloy perovskite thin film Cs0. 05MA 0. 10FA 0. 85Pb1-xCuxI3, the preparation method of the lead-copper alloy perovskite thin film comprises the following steps: adding formamidine hydriodate, methylamine hydriodate, cesium iodide, lead iodide and cuprous iodide powder into a solvent, and uniformly stirring and mixing to prepare a perovskite precursor solution; the PbI2 powder and the CuI powder are uniformly mixed, the uniformly mixed precursor solution is spin-coated, annealing is carried out on a heating stage, the thin film is obtained, the ratio of the PbI2 powder to the CuI powder is 1-x: x, and x is equal to 0-10%. The copper-doped lead-copper alloy perovskite with the three-dimensional octahedral structure synthesized by the method has structural and thermodynamic stability and is high in fluorescence performance and light absorption performance, and the crystallization quality of a thin film is remarkably improved; when the perovskite thin film is used as a light absorption layer of the cell, a perovskite solar cell with high photoelectric conversion efficiency can be prepared, and the perovskite solar cell has excellent ultraviolet resistance and high temperature resistance stability.

The invention discloses a p-type copper doped antimony bismuth tellurium thermoelectric material, a preparation method, a module and a system, and belongs to the technical field of thermoelectric materials. The chemical formula of the material is Bi < 0.5 > Sb < 1.5 > Te < 3 > Cu < x >, wherein x is equal to 0.0025. A trace amount of copper element is accurately doped into a Bi0. 5Sb1. 5Te3 matrix, so that the carrier concentration is remarkably improved, the bipolar effect is inhibited, and meanwhile, the lattice thermal conductivity is effectively reduced by utilizing point defects and the phonon scattering effect of second-phase CuTe, so that collaborative optimization of electrical and thermal properties is realized. The average dimensionless thermoelectric figure of merit (ZT) of the material in a temperature zone of 30-100 DEG C is up to 1.46, which is superior to that of the existing commercial material. The preparation method combines vacuum melting, ball milling and spark plasma sintering (SPS) processes, and is simple and convenient in process and high in repeatability. And further high-pressure torsion (HPT) post-treatment can further refine the grains and reduce the heat conductivity. The material is particularly suitable for an energy recovery and self-energized monitoring system of converter valve low-temperature waste heat.

The application discloses a titanium-site copper-doped high-performance sodium-ion battery positive electrode material of sodium titanium manganese phosphate and a preparation method and application thereof, and belongs to the technical field of sodium-ion batteries. The titanium-site copper-doped sodium-ion battery positive electrode material of sodium titanium manganese phosphate is obtained by doping copper at the titanium site of sodium titanium manganese phosphate; the general formula of the titanium-site copper-doped sodium-ion battery positive electrode material of sodium titanium manganese phosphate is Na 3+ 2x MnTi 1‑x Cu x (PO4)3, wherein 0 < x <= 0.2. The preparation method of the titanium-site copper-doped sodium-ion battery positive electrode material of sodium titanium manganese phosphate comprises the following steps: raw materials including a titanium source, a manganese source, a sodium source, a phosphorus source and a copper source are prepared into a precursor powder through a spray drying method or a ball milling method; and the precursor powder is calcined under an inert atmosphere to obtain the titanium-site copper-doped sodium-ion battery positive electrode material of sodium titanium manganese phosphate. The obtained positive electrode material has small polarization, reverse-site defects are effectively inhibited, reversible capacity is obviously improved, and rate performance is obviously improved.

The application discloses rhombic nanosheet-shaped copper-doped nickel-cobalt transition metal selenide and a preparation method and application thereof. The preparation method of the material is as follows: after a coordination agent, a surfactant, a nickel salt, a cobalt salt and a copper salt are mixed with a solvent, the mixture is placed in a microwave COD digester to perform a microwave-assisted solvothermal reaction, a copper-doped nickel-cobalt MOFs precursor is obtained; the copper-doped nickel-cobalt MOFs precursor and a selenite are respectively placed in the downstream and the upstream of a tube furnace, and a selenization reaction is performed under a protective atmosphere, and the rhombic nanosheet-shaped copper-doped nickel-cobalt transition metal selenide is obtained. The material has an ultrathin rhombic nanosheet-shaped structure, the surface of the material is rough, the particle size distribution of the material is uniform, and the material has excellent electrochemical performance; when the material is used as an electrode material of a supercapacitor, the capacitance performance can be greatly improved. The preparation process is simple, the conditions are mild, the time consumption is short, and the cost is low, and the preparation process meets the industrial production standards.

The invention relates to a normal-temperature and normal-pressure high-conductivity micro-nano material based on copper-doped lead apatite as well as preparation and application thereof. The chemical general formula of the material is Pb10-XCux (PO4) 6O, x is more than 0.95 and less than 1.05, the material has a hexagonal system apatite structure, Cu < 2 + > occupies a lattice 4f site and forms a [CuO5] pyramid unit, strong electroacoustic coupling is realized through Jahn-Teller distortion, and the material shows excellent conductivity at normal temperature and normal pressure. The room temperature resistivity of the material is less than or equal to 0.05 mu omega.cm, the critical current density is greater than or equal to 1.2 * 10 < 6 > A / cm < 2 >, and the sulfur impurity content is less than or equal to 0.05 at% The invention further discloses a gradient sulfur control heat treatment method, and the purity and the conductive stability of the material are remarkably improved. The material is suitable for a power transmission system, is particularly suitable for a high-conductivity component without cooling, and has the advantages of high current carrying capacity, high environmental resistance, low cooling cost and the like.

The present application relates to the technical field of silicon material preparation, and particularly relates to a method for preparing copper-doped porous silicon material from decomposed photovoltaic modules, which comprises the following steps: step 1: pyrolyzing decomposed photovoltaic modules to obtain battery pieces and copper cable products, crushing the battery pieces, and vacuum smelting the battery pieces with a certain proportion of copper cables to obtain copper-doped silicon ingots; step 2: reacting silicon copper composite powder obtained by crushing the silicon ingots with magnesium powder to synthesize magnesium silicide, and grinding the magnesium silicide sand to obtain sand-ground magnesium silicide powder; and step 3: performing dealloying reaction treatment on the sand-ground magnesium silicide powder. The present application uses battery pieces and copper cables in decomposed photovoltaic modules as raw materials, combines gas-phase dealloying, and uses acid pickling to prepare a porous structure silicon negative electrode material with excellent electrochemical performance. The present application does not involve a template, is simple and efficient to operate, has a short process cycle, uses inexpensive and widely-sourced raw materials, and is easy to mass-produce.

This invention discloses a copper-doped TiO2 electro-Fenton cathode with an amorphous / crystalline heterojunction, its preparation method, and its application. The amorphous / crystalline heterojunction is formed by in-situ growth of titanium dioxide nanosheets on the substrate electrode surface via hydrothermal method, followed by doping and annealing. The amorphous interface formed by this invention exhibits stronger interfacial stress, increases the number and stability of unsaturated copper sites, and enhances the catalytic activity of the electrode through the construction of the amorphous / crystalline heterojunction, thereby enabling the electro-Fenton reaction at the cathode to proceed continuously and efficiently over a wide pH range.

The invention belongs to the technical field of alloy surface modification, and particularly relates to an electrolyte and application thereof, a copper-doped micro-arc oxidation film and a preparation method of the copper-doped micro-arc oxidation film. The invention provides an electrolyte. The electrolyte comprises a composite copper source, a film-forming agent, a surfactant, a pH value regulator and water, the composite copper source comprises soluble copper salt and sodium copper chlorophyllin. The chlorophyll copper complex ions and the copper ions are used as composite copper sources in the electrolyte, and the copper-doped micro-arc oxidation film formed by performing micro-arc oxidation on the chlorophyll copper complex ions and the copper ions has relatively high copper doping amount, so that the corrosion resistance and the antifouling property of the oxidation film are improved. And meanwhile, the working window is expanded when the electrolyte is used for micro-arc oxidation, and industrial application is facilitated.

The invention relates to the technical field of positive electrode materials, in particular to a copper-doped carbon nanotube coated sodium vanadium phosphate positive electrode material and a preparation method thereof.The copper-doped carbon nanotube coated sodium vanadium phosphate positive electrode material comprises a sodium vanadium phosphate matrix and a copper-doped carbon nanotube layer coating the surface of the sodium vanadium phosphate matrix; the doping amount of copper in the copper-doped carbon nanotube layer is 1-5% of the mass of the carbon nanotube; the pipe diameter of the copper-doped carbon nanotube is 5 to 20 nm, and the length of the copper-doped carbon nanotube is 100 to 500 nm; the particle size of the sodium vanadium phosphate matrix is 0.5-2 [mu] m; the thickness of the copper-doped carbon nanotube layer is 10 to 50 nm; a large number of experimental studies show that the doping amount of copper in the copper-doped carbon nano tube is controlled to be 1-5% of the mass of the carbon nano tube, in this range, extra carriers can be introduced into crystal lattices of the carbon nano tube through the copper element, the intrinsic resistivity of the carbon nano tube is reduced, the electron conduction efficiency is improved, and it can be avoided that the copper is excessively agglomerated to form an insulating phase; when the copper doping amount is about 3%, the carrier concentration is optimal.

The invention relates to a method for colorimetrically identifying thiophanate-methyl based on copper-doped carbon quantum dots, which comprises the following steps: step 1, mixing and dissolving raw materials and carrying out hydrothermal reaction to obtain a copper ion-doped carbon quantum dot crude product; step 2, based on the copper ion doped carbon quantum dot crude product obtained in the step 1, performing dialysis purification, concentration preparation and characterization to obtain a 0.5 mg / mL copper doped carbon quantum dot solution meeting requirements; and step 3, based on the 0.5 mg / mL copper-doped carbon quantum dot solution prepared in the step 1 and the step 2, through mixed reaction, spectrum and color detection and interference verification, identification and stability verification of thiophanate-methyl are realized. The method has the beneficial effects that the operation is simple and rapid, the cost is low, the thiophanate-methyl can be visually identified and analyzed on site in real time, and the used copper-doped carbon quantum dot material has better high-concentration salt resistance than a nano gold colloid solution.

This application relates to a copper sulfide-doped carbon-based composite material, a preparation method thereof, and a sodium-ion battery, belonging to the technical field of sodium-ion batteries. The copper sulfide-doped carbon-based composite material of this application has a core-shell structure. The inner core includes carbon material A, and copper sulfide is uniformly dispersed in the carbon material A. The outer shell includes carbon material B doped with phosphorus element, and the mass ratio of the outer shell to the inner core is 1-5:95-99. By doping copper sulfide into porous hard carbon in this application, copper sulfide has the characteristic of high electronic conductivity, which improves the electronic conductivity and ionic conductivity of the hard carbon composite material, and further improves the charge-discharge performance of the carbon composite material, especially the rate performance.

The invention provides a preparation method of a chargeable and dischargeable copper-plated titanium dioxide nanotube antifouling material. The preparation method comprises the following steps: preparing TNT by adopting an anodic oxidation method, activating the TNT by using a colloidal silver activating solution, and performing copper plating treatment on the TNT by adopting a method of reducing CuSO4 by using formaldehyde to obtain a copper-doped TNT nanotube. The material takes a titanium dioxide nanotube array as a substrate to load CuO or Cu2O, TNT-Cu is used for antifouling of phaeodactylum tricornutum for the first time, through the synergistic effect of a capacitance effect and controllable Cu < 2 + > slow release, the adhesion inhibition rate of the phaeodactylum tricornutum reaches 98.3 + / -0.87%, the death rate reaches 96.0 + / -2.0%, and efficient, lasting and environment-friendly antifouling of the phaeodactylum tricornutum is achieved.

The invention provides a preparation method of a nickel-copper-doped lithium manganate positive electrode material and the nickel-copper-doped lithium manganate positive electrode material. The preparation method specifically comprises the following steps: S1, preparing a nickel-copper-doped lithium manganate positive electrode material precursor; s2, the prepared nickel-copper doped lithium manganate precursor is placed in a Joule heat device, the Joule heat device comprises a conductive substrate and a power source, the nickel-copper doped lithium manganate precursor is calcined by adjusting parameters of the power source to control the sintering temperature, the sintering time and the heating rate, and the nickel-copper doped lithium manganate positive electrode material is obtained. According to the method, nickel and copper transition metal ions are introduced into the lithium manganate positive electrode material, the ginger-Taylor effect and manganese dissolution problems are inhibited, meanwhile, the material can be obtained within several seconds to dozens of seconds by utilizing a Joule thermal method, the time is greatly shortened, the energy consumption is reduced, the cost is reduced, and the lithium manganate positive electrode material prepared by the method has excellent electrochemical performance.

The application discloses a kind of multi-level pore structure copper modified titanium dioxide photocatalyst and preparation method thereof, belong to photocatalytic hydrogen production material technical field.Copper-doped titanium-based MOF material is synthesized by diaminoterephthalic acid, tetrabutyl titanate and copper nitrate trihydrate through hydrothermal method, copper-doped titanium-based MOF is calcined by air and ammonia gas in two steps, and titanium dioxide composite material Cu-TiO2 / Cu with copper ion doping and copper element loading is obtained.The method is prepared by the method of calcining after synthesizing precursor, and the Cu-TiO2 / Cu with multi-level pore structure is prepared, which shows excellent water decomposition hydrogen production performance under ultraviolet light.The method is a scalable preparation method, which can be applied to the doping modification of other transition metal ions, and can fully expose noble metal sites to improve the catalytic performance and increase the atomic utilization rate.The method is simple, the reaction condition is mild, the cost is low, and has wide application prospect.