90 results about "Fluorine doping" patented technology

The invention provides a lithium ion battery positive electrode material with high interface conductivity and a preparation method thereof, and belongs to the technical field of new energy battery electrode materials. The preparation method of the lithium ion battery positive electrode material comprises the following steps: under the protection of nitrogen, reacting a metal salt solution containing nickel, cobalt and manganese with a precipitator and a complexing agent to synthesize a compact spherical NCM precursor; the preparation method comprises the following steps: uniformly ball-milling NCM, LiOH.H2O, LiF and absolute ethyl alcohol, and carrying out densification sintering to obtain fluorine-doped NCM powder; the preparation method comprises the following steps: mixing LiNO3, NH4H2PO4, urea and deionized water to prepare a precursor solution, uniformly loading the precursor solution on fluorine-doped NCM powder by adopting a rotary evaporation method, and carrying out heat treatment to obtain a lithium phosphorus oxygen nitrogen glass phase coated fluorine-doped NCM composite material; and dispersing the carboxylated multi-walled carbon nanotubes in absolute ethyl alcohol, adding the LiPON coated fluorine-doped NCM composite material and phenolic resin, and carbonizing to obtain the positive electrode material. The obtained lithium ion battery positive electrode material has high interface conductivity, and the long cycle life is remarkably prolonged.

The application provides a fluorine-doped Fe-N-C composite material and a preparation method and application and regeneration thereof, and belongs to the technical field of water pollution. In the application, an iron precursor, a zinc salt, an organic ligand and an organic solvent are mixed to synthesize Fe-doped metal organic framework Fe@ZIF-8 material, and then the Fe@ZIF-8 material is carbonized into Fe-N-C material; then the Fe-N-C material is mixed with a fluorine source and subjected to secondary carbonization to obtain the fluorine-doped Fe-N-C composite material. In the application, fluorine atoms are introduced into the Fe-N-C material to produce axial coordination with Fe of the FeN4 center, the fluorine element with high electronegativity can effectively improve the isoelectric point of the Fe-N-C material, the reaction activity of the material is enhanced, the Fe leaching of the material in the reaction process is inhibited, and the stability of the material is improved. In addition, the prepared fluorine-doped Fe-N-C composite material can be reused through fluorine-doping regeneration, and high reduction activity and stability can be maintained.

An electrode which includes nanoparticles of a carbon-doped tin oxide of formula C—SnO2-x where x=is from 0.001 to 0.1, having surface oxygen vacancies. The electrode includes a fluorine-doped tin oxide substrate. A film of the nanoparticles is present on at least one surface of the fluorine-doped tin oxide substrate. The surface oxygen vacancies correspond to an O 1s peak shift of 0.5-2 eV in the X-ray photoelectron spectroscopy (XPS) for C—SnO2-x compared to C—SnO2 without surface oxygen vacancies.

Described, herein, relates to a fluorinated electrocatalyst and a method of optimizing a catalytic reaction within an electrochemical cell, in which fluorine atoms may be introduced to the local coordination environment sites to weaken the carbon-nonmetal bonds and drive the nonmetallic chemical elements towards metallic chemical elements. The method may include introducing fluorine atoms to the metal-nonmetal-carbon catalysts to occupy the LCE site within the catalysts in order prevent the nonmetallic chemical elements from occupying the LCE sites, thereby driving the nonmetallic chemical element to form a nonmetallic chemical element layer on a surface of the metallic chemical elements. The nonmetallic chemical element layer may also inhibit the agglomeration and migration of the metallic chemical elements about the LCE site, optimizing catalyst activity through the regulation of the LCE site. The resulting fluorine-doped high-performance catalysts may be usable within electrochemical cells, with long-term stability and reduced degradation.

The invention discloses a glass fiber surface low-k SiOF coating based on a sol-gel and ultraviolet curing synergistic technology and a preparation method of the glass fiber surface low-k SiOF coating. According to the method, a sol-gel technology, a fluorine doping technology and an ultraviolet curing technology are creatively combined, and a compact, uniform and high-binding-force fluorine-doped silicon oxide coating with a low dielectric constant is constructed on the surface of the glass fiber. The dielectric constant of the coating at 10GHz is epsilon < lt >; 3.5, the dielectric loss tan [delta] lt; 0.005, the water contact angle gt; the temperature is 100 DEG C, and the water absorption is 1t; and the performance change rate is less than 10% after 96h of 85 DEG C / 85% RH aging. The invention solves the problems of high temperature, large energy consumption and easy fiber damage in traditional thermocuring, provides a low-temperature efficient surface modification technology which can be integrated with a glass fiber drawing process on line, and is suitable for the advanced electronic packaging field of high-frequency printed circuit boards and the like.

This invention proposes a nano-transparent semiconductor electrothermal structure, its fabrication method, and a semiconductor electrothermal module. The nano-transparent semiconductor electrothermal structure comprises, from bottom to top, a first insulating layer, a substrate, an electrothermal layer, a second insulating layer, and electrodes. Both the first and second insulating layers are nanoscale insulating films formed by pulsed radio frequency synergistic physical vapor deposition of hexagonal boron nitride. The first insulating layer is formed on the back side of the substrate, and the second insulating layer is formed above the electrothermal layer. The electrothermal layer is a nanoscale electrothermal conversion film formed by aluminum-doped zinc oxide, tin-doped indium oxide, and fluorine-doped tin oxide containing yttrium trioxide. At least one of tantalum, beryllium, and niobium is embedded in the lattice gaps of the electrothermal layer. The electrothermal layer is used for electrothermal conversion when energized. Electrodes are disposed on both sides of the electrothermal layer, and the electrodes are in contact with the electrothermal layer and connected to a power source. This invention adds a first insulating layer to the back of the substrate, which, together with the second insulating layer above the heating layer, forms a double-sided hexagonal boron nitride insulating protection structure. This effectively blocks leakage paths on the back of the substrate, improving safety. At the same time, the double-sided high thermal conductivity insulating layers balance the thermal resistance on both sides of the substrate, improving heating uniformity. The two equal-thickness thin films ensure symmetrical stress on both sides of the substrate, preventing warping and deformation. The heating layer uses pulsed radio frequency synergistic physical vapor deposition to improve film uniformity. Moreover, the use of hybrid deposition reduces the indium content while still achieving a better-performing heating layer.

The application discloses an iridium oxide modified fluorine-doped tin oxide electrode and a preparation method and application thereof. The electrode comprises a light-transmitting fluorine-doped tin oxide conductive glass substrate and an in-situ attached iridium oxide nano-modified layer. The preparation method comprises the following steps: preparation and aging of a precursor solution, alternating current electrochemical deposition, annealing and cleaning, and laser patterning treatment. The application further discloses a cell impedance sensor organ chip system comprising the electrode and application of the system in in-vitro drug screening. The application utilizes the low cost and light-transmitting property of the fluorine-doped tin oxide and the excellent charge injection capacity of the alternating current deposited iridium oxide nano layer to greatly reduce the interface impedance. The scheme meets the in-situ optical observation, realizes the high-sensitivity biological impedance monitoring comparable to gold electrodes, effectively solves the problems of high cost and complex process of the existing organ chip electrode, and is very suitable for popularization and application as a disposable high-throughput consumable.

A silicon composite negative electrode material, a negative electrode sheet, and a battery. The silicon composite negative electrode material comprises an inner core (1), an intermediate layer (2), and an outer shell (3) in sequence, wherein the inner core (1) is silicon particles; the intermediate layer (2) is a fluorine-doped carbon layer; the outer shell (3) is a conductive polymer layer; and the mass proportion of fluorine in the silicon composite negative electrode material is 0.4-1.5%. Coating the surfaces of the silicon particles with the fluorine-doped carbon layer can effectively alleviate mechanical stress generated by volume expansion accompanying the intercalation of lithium into silicon particles, thereby improving the structural stability of the silicon composite negative electrode material. Moreover, fluorine doped in the carbon layer can form LiF with lithium ions, resulting in the formation of a stable SEI film rich in LiF on the negative electrode side. Further coating the surface of the fluorine-doped carbon layer with the conductive polymer layer can further optimize the conductivity and structural stability of the silicon composite negative electrode material, thereby ensuring that a battery containing the silicon composite negative electrode material has good cycling performance and high-rate fast charging performance.

This invention provides a fluorine-doped ZnIn2S4 photocatalyst, its preparation method, and its application. The fluorine-doped ZnIn2S4 photocatalyst has a spherical nanoflower structure, which is composed of nanosheets arranged in an array. The preparation method includes the following steps: (1) adding ZnCl2, InCl3·4H2O, and thioacetamide to water and stirring to obtain a mixture A; (2) adding a fluorine source to mixture A and mixing thoroughly to obtain mixture B; (3) subjecting mixture B to a hydrothermal reaction, separating the product after the reaction, washing, and drying to obtain the F-ZnIn2S4 photocatalyst. The fluorine-doped ZnIn2S4 photocatalyst exhibits highly efficient photocatalytic activity.

The invention discloses fluorine-doped modified artificial graphite and a preparation method and application thereof.The preparation method of the fluorine-doped modified artificial graphite comprises the steps that raw material coke and asphalt are subjected to batch mixing, granulation and shaping, and then an artificial graphite precursor is obtained; and carrying out doping reaction on the artificial graphite precursor and an inorganic fluorine source, graphitizing, screening and demagnetizing to obtain the fluorine-doped modified artificial graphite. The artificial graphite precursor and the inorganic fluorine source are subjected to doping reaction, fluorine doping of the artificial graphite can be realized, and when the artificial graphite is used as a lithium ion battery negative electrode material for formation, a layer of SEI film rich in LiF can be formed on the surface, so that the loss of Li in electrolyte is reduced, and the service life of the lithium ion battery is prolonged. And the stability and the first coulombic efficiency of the artificial graphite as the negative electrode material of the lithium ion battery are improved.

The invention provides synthesis of a fluorine-doped ion sieve precursor Li1. 6Mn1. 6O4 and application of the fluorine-doped ion sieve precursor Li1. 6Mn1. 6O4 to adsorption and lithium extraction, and belongs to the technical field of lithium extraction of adsorbent brine. The synthesis method comprises the following steps: putting an ion sieve precursor Li1. 6Mn1. 6O4 and a fluorine-containing ionic liquid into water, uniformly stirring, carrying out a thermal reaction, naturally cooling, carrying out suction filtration, washing, and finally carrying out vacuum drying to obtain the fluorine-doped ion sieve precursor Li1. 6Mn1. 6O4, the molar ratio of fluorine to manganese is (0.05-0.8): 1. The synthesis method of the fluorine-doped ion sieve precursor Li1. 6Mn1. 6O4 has the advantages that the raw materials are wide, the doping process is simple and controllable, the doped raw materials can be recycled, the energy consumption is lower, and the fluorine-doped ion sieve precursor Li1. 6Mn1. 6O4 is greener and more environment-friendly; the fluorine-doped ion sieve H1. 6Mn1. 6O4 prepared from the precursor is stable in performance, and has great significance in reducing manganese solution loss and improving a brine lithium extraction process.

A process for manufacturing a coated glass article, said process comprising the following steps in order: (a) providing a glass substrate having a surface, (b) forming a gaseous mixture comprising a source of tin, a source of fluorine, molecular oxygen and water, (c) delivering the gaseous mixture to the surface of the glass substrate, and (d) depositing a coating based on fluorine-doped tin oxide on the surface of the substrate using chemical vapour deposition (CVD), and (e) exposing the substrate to an environment that is under a vacuum and is at a temperature of from 450°C to 750°C for at least 5 minutes.

The application is suitable for the technical field of electrochemical energy storage devices, and provides a high-performance flexible nickel-iron battery and a preparation method thereof, which comprises a fluorine-doped nickel hydroxide positive electrode based on a flexible conductive substrate, an iron-based material negative electrode based on a flexible conductive substrate, and a gel electrolyte; fluorine-doped nickel hydroxide is used as the positive electrode active material, and through controllable fluorine ion doping, the electronic conductivity and structural stability of the nickel hydroxide are significantly improved while the structure of the nickel hydroxide is maintained; the positive electrode and the negative electrode are both loaded on a flexible conductive substrate; and the PVA-KOH gel electrolyte is combined, and through a freeze-thaw solidification process, the electrode and the electrolyte are integrated in a flexible manner. The battery prepared by the application has high energy density, excellent rate performance and cycle stability, and has good electrochemical performance retention under bending, folding and other deformations, and can be applied to the fields of wearable electronic devices and the like.

An electrode which includes nanoparticles of a carbon-doped tin oxide of formula C—SnO2-x where x=is from 0.001 to 0.1, having surface oxygen vacancies. The electrode includes a fluorine-doped tin oxide substrate. A film of the nanoparticles is present on at least one surface of the fluorine-doped tin oxide substrate. The surface oxygen vacancies correspond to an O 1s peak shift of 0.5-2 eV in the X-ray photoelectron spectroscopy (XPS) for C—SnO2-x compared to C—SnO2 without surface oxygen vacancies.

This invention relates to a nickel-manganese bimetallic hydroxide / oxide electrochromic thin film, its preparation, and its application. The electrochromic thin film of this invention is directly grown on the surface of fluorine-doped tin dioxide (FTO) conductive glass via a hydrothermal method. The specific steps are as follows: First, nickel source, manganese source, urea, and ammonium fluoride are dissolved in deionized water, then transferred to a hydrothermal reactor. An FTO conductive glass is placed in the reactor with its conductive side facing down. After a period of constant-temperature hydrothermal reaction, it is naturally cooled to room temperature. The FTO conductive glass is then removed from the reactor, cleaned, and dried to obtain the nickel-manganese bimetallic hydroxide electrochromic thin film. After calcination at a certain temperature, a nickel-manganese bimetallic oxide electrochromic thin film is obtained. Compared with single nickel oxide and manganese oxide, the NiMnLDH thin film of this invention exhibits a larger light modulation amplitude in the visible light region and higher transmittance in the faded state, making it applicable to electrochromism and related fields.

The application discloses a fluorine-doped and heterojunction synergistically modified hydrogen evolution electrocatalyst, which is composed of a fluorine-doped double transition metal phosphide heterojunction active phase and a carrier, the fluorine-doped double transition metal phosphide heterojunction active phase is in a relatively rough nanowire structure, and the nanowire is attached to the carrier; the double transition metal phosphide in the double transition metal phosphide heterojunction is Ni2P and CoP, and the two phases constitute the heterojunction. The fluorine-doped and heterojunction synergistically modified hydrogen evolution electrocatalyst has high intrinsic activity, good conductivity and excellent stability, can stably and efficiently catalyze the water electrolysis hydrogen evolution reaction under a full pH condition, has excellent stability and durability, and the comprehensive catalytic performance is close to that of a noble metal Pt / C catalyst.

A process for manufacturing a coated glass article, said process comprising the following steps in order: providing a glass substrate having a surface, forming a gaseous mixture comprising a source of tin, a source of fluorine, molecular oxygen and water, delivering the gaseous mixture to the surface of the glass substrate, and depositing a coating based on fluorine-doped tin oxide on the surface of the substrate, wherein the coating based on fluorine-doped tin oxide comprises two or more layers based on fluorine-doped tin oxide, wherein the process is carried out using chemical vapour deposition (CVD), and wherein the molar ratio of the source of fluorine in the gaseous mixture during deposition of the layer based on fluorine-doped tin oxide that is directly beneath the outermost layer based on fluorine-doped tin oxide : the source of fluorine in the gaseous mixture during deposition of the outermost layer based on fluorine-doped tin oxide is from 0.01 to 1.5.

The application discloses a material for efficiently removing heavy metal pollutants based on fluorinated zero-valent iron and a preparation method thereof, and belongs to the field of environmental functional materials. 0 The material comprises a core layer of zero-valent iron (Fe 0 ) with a particle size of 50-100 nm, and a shell layer of a composite layer of fluorinated iron (FeF3) and fluorine-doped hydroxyl iron oxide (FeOOH-F) with a thickness of 5-20 nm. The heterojunction shell layer formed by the fluorinated iron (FeF2 / FeF3) and the fluorine-doped hydroxyl iron oxide (FeOOH-F) significantly improves the surface active sites and promotes electron transfer, thereby realizing efficient reduction / adsorption of heavy metals (such as Cr(VI), Pb(II), As(III), etc.); the wide pH adaptability (pH 3-9, optimal pH 5-7) overcomes the defects that traditional zero-valent iron is prone to passivation under acidic or alkaline conditions.

This invention relates to the field of waste lithium-ion battery material recycling technology, and particularly to a method for preparing single-crystal fluorine-doped ternary cathode material using battery black powder. The method includes: high-temperature calcination pretreatment of the black powder; sulfuric acid dissolution and leaching; removal of copper, aluminum, iron, calcium, and magnesium impurities; co-precipitation of nickel, cobalt, and manganese at pH 11.2-14, followed by conversion to oxalate using oxalic acid; lithium replenishment and in-situ fluorine doping during calcination using residual fluorine-containing substances in the black powder to obtain regenerated ternary cathode material; and finally, recovery of lithium carbonate from lithium-rich solution. This invention can efficiently recover Ni, Co, Mn, and Li, with an overall recovery rate exceeding 90%. It can also effectively remove impurities such as Cu, Al, Fe, Ca, and Mg, improving material purity. The single-crystal fluorine-doped regenerated ternary material exhibits good cycle stability and rate performance. This invention significantly improves the purity and electrochemical performance of the regenerated material through multi-stage deep impurity removal and in-situ fluorine doping technology. The process is simple, resource utilization is high, and it is suitable for industrial production.

The invention belongs to the technical field of high-energy-density battery materials, and particularly relates to a negative electrode current collector, a preparation method of the negative electrode current collector and a negative-electrode-free lithium metal battery containing the negative electrode current collector. Carbon free radicals and lattice defects are generated on the surface of graphene, and the electron-rich sites promote preferential decomposition of FSI-anions, so that a fluorine-rich stable SEI film is dynamically constructed on a lithium deposition interface. The protective layer formed by the graphene and the SEI can homogenize the distribution of an interface electric field, guide the uniform deposition of lithium, effectively inhibit the growth and side reaction of lithium dendrites, and realize dynamic interface atomic-scale reconstruction. Based on the strategy, the negative-electrode-free lithium metal battery shows excellent cycle stability and can stably run for more than 1400 cycles, and the average coulombic efficiency is as high as 99.6%. The cycle life of the whole battery matched with the LiFePO4 positive electrode exceeds 2900 times, and the capacity fading rate of each cycle is only 0.012%.

The invention discloses an antibacterial material for root canal therapy based on fluorine titanium oxide and a preparation method and application of the antibacterial material, and belongs to the technical field of oral medical materials, and the antibacterial material for root canal therapy is fluorine titanium oxide nanoparticles; the fluorine titanium oxide nanoparticles are fluorine-doped titanium oxide; the fluorine titanium oxide nanoparticles can absorb infrared radiation of a human body and generate surface electromagnetic oscillation, so that a bacterial membrane structure is destroyed through a charge polarization effect. A continuous antibacterial field is excited on the surfaces of the fluorine titanium oxide nanoparticles by utilizing human body infrared radiation, the antibacterial effect of destroying a bacterial membrane by charge polarization is realized, and the method has the advantages of long-acting antibacterial effect, no chemical release, avoidance of cytotoxicity and the like; in addition, when the antibacterial material fluorine titanium oxide nanoparticles are prepared into antibacterial coating liquid, the operation process can be simplified, and the antibacterial coating liquid is suitable for clinical root canal flushing instruments.

A coated glass article includes a glass substrate, a color suppression interlayer deposited over the glass substrate, and a fluorine doped tin oxide coating deposited over the color suppression interlayer. The fluorine doped tin oxide coating is comprised of two or more fluorine doped tin oxide layers, with the outermost fluorine doped tin oxide layer of the fluorine doped tin oxide coating having an electron concentration of from 4.0 x 1020 to 6.0 x 1021 and a thickness of from 100 nm to 170 nm, while the fluorine doped tin oxide layer directly beneath the outermost fluorine doped tin oxide layer has an electron concentration of from 2.0 x 1018 to 5.5 x 1019 and a thickness of from 40 nm to 100 nm. The coated glass article has a sheet resistance of from 15 Ω / square to 40 Ω / square, transmits greater than or equal to 82% of the radiation having wavelengths of from 400 nm to 780 nm, and transmits greater than 78% of the radiation having wavelengths of from 900 nm to 1300 nm.

The invention provides a solid electrolyte which is characterized in that the solid electrolyte comprises a fluorinated sulfide solid electrolyte and a fluorinated layer at least partially covering the surface of the fluorinated sulfide solid electrolyte, the chemical formula of the fluorinated sulfide solid electrolyte is Li7-xPS6-xClxFy, x is greater than or equal to 1 and less than or equal to 1.6, y is greater than 0 and less than 1, and y is used for representing the doping amount of fluorine. The solid-state electrolyte provided by the invention has the fluorine-doped fluorinated sulfide solid-state electrolyte, so that the bulk phase property of the sulfide solid-state electrolyte can be effectively improved, and the ionic conductivity of the fluorinated sulfide solid-state electrolyte is improved; through synergistic cooperation of the fluorinated sulfide solid-state electrolyte and the surface fluorinated layer, a positive electrode electrolyte interface can be formed on the surface of the fluorinated sulfide solid-state electrolyte, direct contact between an electrode and the electrolyte can be effectively isolated, oxidation of the fluorinated sulfide solid-state electrolyte is prevented, and the fluorinated layer can promote uniform deposition of lithium ions, so that the service life of the lithium ion battery is prolonged. The dendritic crystal growth is inhibited.

The fluorine content of the fluorine-doped ion sieve precursor is 0.2%-2%, and the particle size of the fluorine-doped ion sieve precursor is 80-150 nm. The invention also discloses a preparation method of the fluorine-doped ion sieve precursor. The preparation method comprises the following steps: preparing a manganese and lithium metal salt solution A, and preparing a citric acid solution B and a fluorine-containing salt solution D; mixing the solution A and the solution B, heating and stirring to obtain a colloidal solution C; performing vacuum drying on the solution C to obtain a solid intermediate; grinding the solid intermediate, and calcining in a muffle furnace to obtain an ion sieve precursor marked as LMO powder; weighing LMO powder, putting the LMO powder into a reaction kettle, and adding the fluorine-containing salt solution D and deionized water; placing the reaction kettle in a muffle furnace for heat treatment to obtain precursor slurry; and carrying out suction filtration, washing and drying on the precursor slurry to obtain the fluorine-doped ion sieve precursor. According to the invention, the ion sieve precursor is doped with fluorine, so that the electron transmission path of disproportionation reaction is changed, and the problem of manganese solution loss of LiMn2O4 in the process of adsorbing and extracting lithium is solved.

This invention is related to a cement clinker formed by firing raw meal prepared with new and improved raw meal minerals. This new cement clinker is a hydraulically activated cement clinker which can contain alite (tricalcium silicate) and aH' dicalcium silicate phase together with boron and fluorine doping and can be fired at lower temperatures and has lower carbon dioxide emission.

The application relates to the technical field of crystalline silicon solar cells, and particularly discloses a low parasitic absorption TOPCon solar cell, which comprises an N-type silicon base, the front surface of the N-type silicon base is provided with a boron emitter, the side surface of the boron emitter is provided with a front-positioned passivation layer and an anti-reflection layer, the back surface of the N-type silicon base is provided with a tunneling oxide layer, the side surface of the tunneling oxide layer is provided with hydrogenated lightly-doped polysilicon and hydrogenated heavily-doped polysilicon, and the hydrogenated lightly-doped polysilicon and the hydrogenated heavily-doped polysilicon are provided with conductive oxide therebetween. The low parasitic absorption TOPCon solar cell provided by the application is based on a TOPCon cell, uses the transparent conductive characteristic of fluorine-doped tin oxide, and uses thickened fluorine-doped tin oxide as a second conductive oxide layer. Not only can the fluorine-doped tin oxide effectively hinder the inward diffusion of phosphorus atoms during annealing, but also can limit the inward diffusion of metal Ag during sintering. Therefore, the thickened fluorine-doped tin oxide is configured with thinned outer hydrogenated heavily-doped Poly-Si to reduce parasitic absorption.

The application discloses a titanium-doped bismuth vanadate film photo-anode and a preparation method thereof. A precursor solution formed by mixing bismuth nitrate, an aqueous potassium iodide solution and an ethanol solution of benzoquinone is used as an electrolyte, fluorine-doped tin dioxide conductive glass (FTO) is used as a working electrode, a platinum sheet is used as a counter electrode, Ag / AgCl is used as a reference electrode, a bias voltage of -0.1 V vs. Ag / AgCl is applied to the working electrode, and a bismuth oxyiodide precursor film is deposited on the FTO. Then, a mixed solution of titanium tetrachloride and acetylacetone vanadyl dimethyl sulfoxide is added dropwise to the bismuth oxyiodide precursor film, and the titanium-doped bismuth vanadate film photo-anode is obtained through calcination and neutralization treatment. The titanium-doped bismuth vanadate film photo-anode has higher photoelectrocatalytic efficiency and charge transport efficiency, and can be widely applied to the fields of photoelectrocatalytic hydrogen production and photoelectrocatalytic degradation of pollutants.

The application relates to a kind of multicomponent composite coating anode plate and its preparation method, belong to anode technical field.The anode plate includes metal matrix and composite coating sequentially arranged on the surface of the metal matrix, the composite coating is sequentially bottom layer, intermediate layer and surface layer from bottom to top;The bottom layer is MAX phase conductive layer, combined with metal matrix by vacuum plasma spraying, the intermediate layer is formed in situ by using MAX phase in the bottom layer as template, the surface layer is prepared by fluorine-doped SnO2 treated by titanate, chloroiridic acid and pentachloride, and the MAX phase is at least one of Ti3AlC2 and Ti2AlC.The anode prepared by the application has excellent bonding force, chemical activity and strengthening life.

The invention belongs to the technical field of luminescent materials, and particularly relates to a preparation method of a pure green light fluorine-doped perovskite quantum dot solution. The preparation method comprises the following steps: uniformly mixing an formamidine bromide solution, a PbBr2 solution, a ligand and an optical coupling agent to obtain a precursor solution; adding the precursor solution into an anti-solvent, carrying out stirring reaction, adding a terminating agent to terminate the reaction, carrying out centrifugal separation to obtain a solid, adding a solvent into the solid, uniformly mixing, centrifuging and filtering to obtain a colloidal solution; and adding a fluorine doping agent into the colloidal solution to react, reacting under the irradiation of ultraviolet light, performing centrifugal separation to obtain a solid, adding a solvent into the solid, and uniformly mixing to obtain a pure green light fluorine-doped perovskite quantum dot solution. According to the pure green light fluorine-doped perovskite quantum dot solution and the preparation method thereof, the optical coupling agent and fluorine ions have a synergistic effect, the prepared pure green light fluorine-doped perovskite quantum dot solution has excellent thermal stability, green light emission can be achieved within the range of 525-535 nm, and the commercial application potential is great; the preparation method is simple and easy to operate, the process is stable, and the process flow controllability is high.