149 results about "Titanium dioxide nanoparticles" patented technology

The invention belongs to the technical field of biomedical engineering, and particularly relates to a preparation method and application of a titanium dental implant surface coating, and the preparation method comprises the following steps: S1, pretreatment of a titanium dental implant matrix: sequentially carrying out grinding and polishing, ultrasonic cleaning and acid etching treatment; s2, preparation of a coating precursor solution: adding nano-hydroxyapatite powder, chitosan, gelatin and titanium dioxide nanoparticles into deionized water, stirring to form a suspension, then adding a silver nitrate solution, and continuously stirring to form the coating precursor solution; s3, coating a coating: coating the surface of the pretreated titanium dental implant matrix with the coating precursor solution by adopting an electrophoretic deposition method; and S4, drying and sintering: drying and sintering the coated titanium dental implant. According to the preparation method of the titanium dental implant surface coating, provided by the invention, the bonding strength between the coating and the titanium dental implant matrix can be improved.

The invention belongs to the technical field of optical materials, and particularly relates to an environment-friendly mercaptan optical resin material and a preparation method thereof. Comprising the following steps: (1) uniformly mixing a catalyst, a release agent and a polyisocyanate compound to prepare a mixture; (2) adding titanium dioxide nanoparticles with different particle sizes, which are modified by a polythiol compound and a sulfydryl silane coupling agent, into the mixture; and (3) heating and curing to prepare the environment-friendly mercaptan optical resin material. On the basis of small-particle-size titanium dioxide, a small amount of large-particle-size titanium dioxide is added. The large-particle-size titanium dioxide is not prone to agglomeration and good in dispersity, in the blending process, the granular large-particle-size titanium dioxide is easier to disperse, and agglomeration of small-particle-size titanium dioxide is prevented. Due to the addition of the small-particle-size titanium dioxide and the large-particle-size titanium dioxide, the mechanical strength of the mercaptan optical resin is further improved on the basis of maintaining the high refractive index of the mercaptan optical resin.

The invention relates to the technical field of degradable PE (polyethylene) packaging materials, and discloses a PE film, a preparation process and application in tissue packaging, and the PE film is prepared by the following steps: by taking 7-(diethylamino) coumarin-3-carboxylic acid, 2-naphthyl methanol and epoxy chloropropane as raw materials, carrying out esterification reaction and quaternization reaction to prepare an epoxidized biodegradable organic photosensitizer; based on an epoxy-hydroxyl ring-opening reaction mechanism, hydroxylated titanium dioxide nanoparticles and polyvinyl alcohol resin are respectively modified by using an epoxidized biodegradable organic photosensitizer, and compounding is performed based on a pi-pi accumulation effect between aromatic rings to prepare the ultraviolet light dependent photo-biodegradable component. According to the present invention, the ultraviolet light dependent light-biological degradation component, the compatible component and the composite auxiliary agent are added to the polyethylene matrix, and blow molding is performed to obtain the PE film, and the film product shows excellent light-biological dual degradation performance, has actual use value, and can be used in the tissue packaging field.

The invention relates to the field of waterproof coatings, and discloses a tunnel macromolecular self-cleaning special waterproof coating which comprises polyurethane resin, epoxy resin, fluorosilicone resin, titanium dioxide nanoparticles, zinc oxide nanoparticles, aluminum triphosphate, silicon dioxide nanoparticles, aluminum oxide microparticles, graphene nanosheets, a flexibilizer, a curing accelerator and a solvent. According to the coating, collaborative optimization of functions of all layers is achieved through a multi-layer composite structure, the bottom layer waterproof layer provides efficient waterproofness and weather resistance, the middle reinforcing layer greatly improves the mechanical strength and wear resistance of the coating, the surface layer self-cleaning layer adopts a fluorosilicone resin matrix and introduces super-hydrophobic nano-particles, the surface is endowed with an excellent self-cleaning function, and the self-cleaning effect is good. Dirt adhesion is prevented; and automatic cleaning is facilitated. The coating effectively solves the common problems of leakage, pollution accumulation, abrasion and peeling in a tunnel environment, the protection performance of a coating is remarkably improved, the service life of the coating is remarkably prolonged, and an efficient and lasting protection solution is provided for building structures such as tunnels and subways.

The invention relates to the technical field of energy-saving materials, and discloses a preparation method of a self-assembled multilayer radiation refrigeration film, the self-assembled multilayer radiation refrigeration film comprises: a surface coating composed of a super-hydrophobic coating and used for providing anti-fouling and self-cleaning functions; the top layer is composed of titanium dioxide nanoparticles and has high sunlight reflectivity; the middle layer is a polytetrafluoroethylene layer with a hierarchical porous structure and provides thermal insulation and efficient mid-infrared emission; the bottom layer is composed of graphene oxide, has high heat conduction performance and promotes heat transfer; and the substrate is a flexible polyester film PET and is used as a supporting structure. Through the titanium dioxide nano-particle design of the top layer and the graded porous structure of the middle layer, the film achieves the reflectivity exceeding 90% in the sunlight band (400-2500nm), meanwhile, the film has the radiance exceeding 85% in the middle infrared band (8-13mu m), and due to the optical performance, surface heat absorption can be remarkably reduced under the intense sunlight condition.

The invention relates to the technical field of protective coatings, and discloses a metal roof rust removal self-cleaning waterproof coating which comprises the following components in percentage by weight: 50%-60% of modified acrylic resin, 10%-15% of zinc-doped titanium dioxide nanoparticles, 6%-12% of hydrophobic silicon dioxide, 10%-16% of magnesium-aluminum layered double hydroxide and 2%-4% of zinc phosphate. The invention also discloses a preparation method of the metal roof derusting self-cleaning waterproof coating, which comprises the following steps: S1, the weighed modified acrylic resin is placed in a reaction kettle, and the solvent accounts for 30-50 wt% of the mass of the resin and is ethyl acetate or acetone. Through combination of zinc-doped titanium dioxide, magnesium-aluminum layered double hydroxides, zinc phosphate and hydrophobic silicon dioxide, multiple anti-corrosion, self-cleaning and super-hydrophobic waterproof functions are realized, and meanwhile, a silane coupling agent and a polyurethane prepolymer improve adhesive force and flexibility, so that the coating is durable in a severe environment.

The invention discloses a composite hydrophobic fiber membrane based on a friction nano-generator and a preparation method of the composite hydrophobic fiber membrane. The composite hydrophobic fiber membrane is composed of a polyvinylidene fluoride nanofiber membrane, boracite particles, hydrophobic nanoparticles and polyvinylidene fluoride microspheres. The boracite particles are embedded in fibers of the polyvinylidene fluoride nanofiber membrane, and the hydrophobic nanoparticles are uniformly attached to the polyvinylidene fluoride microspheres and the polyvinylidene fluoride nanofiber; the hydrophobic nano particles are titanium dioxide nano particles or zirconium dioxide nano particles. The preparation method comprises the following steps: dispersing boracite powder and polyvinylidene fluoride powder into N, N-dimethylformamide to prepare an electrostatic spinning solution; the preparation method comprises the following steps: dispersing hydrophobic nanoparticles and polyvinylidene fluoride powder into N, N-dimethylformamide to prepare an electrostatic spraying solution; the composite hydrophobic fiber membrane is prepared through synchronous electrostatic spinning and electrostatic spraying. The problem that a modified polyvinylidene fluoride fiber membrane friction nanometer generator is low in output electrical performance in a high-humidity environment can be solved.

A filtration membrane including a first layer comprising a polyester terephthalate nonwoven fabric, a second layer comprising a polyvinylidene fluoride matrix doped with a polyvinylpyrrolidone and titanium dioxide nanoparticles, and a third layer comprising a polypyrrole polymer. A method of making the membrane is also described. The membrane of the present disclosure is self-cleaning under visible light irradiation conditions.

The invention relates to the field of fire-resistant and heat-insulating bricks, and discloses a multifunctional fire-resistant and heat-insulating brick and a manufacturing process thereof. Comprising the following raw materials in parts by weight: 10-15 parts of silicon carbide, 10-20 parts of mullite, 5-10 parts of cordierite, 30-40 parts of aluminum oxide, 5-10 parts of zirconium oxide, 2-4 parts of titanium dioxide nanoparticles, 6-9 parts of a cleaning agent, 3-5 parts of yttrium oxide and 1-12 parts of a micropore forming agent. By adding manganese oxide and cerium oxide, when the surface of the brick body is in contact with reducing substances or impurities, the oxidation reaction of the reducing substances or impurities can be promoted, and the impurities are converted into oxides which are easy to remove, so that the high-temperature oxidation self-cleaning function is realized, and the capability of keeping the brick body clean and stable in performance in a complex high-temperature environment is enhanced; brick body corrosion and performance degradation caused by impurity deposition are reduced, and therefore the problem that in a high-temperature industrial environment, dirt and impurities are prone to being attached to the surface of a traditional fire-resistant heat-insulating brick, and the heat-insulating performance of the traditional fire-resistant heat-insulating brick is affected is solved.

The invention relates to the technical field of lithium-sulfur battery preparation, and discloses a surface oxidation technology for improving the adsorption performance of a lithium-sulfur battery, which comprises the following steps: stirring and mixing isopropyl titanate and ethanol, adding polyacrylonitrile, stirring and dissolving, and freeze-drying the solution to obtain a precursor; calcining the precursor in an inert atmosphere for 4-8 hours to obtain carbon-coated titanium dioxide nanoparticles; and then the carbon-coated titanium dioxide nano-particles are placed under ozone to be etched for 30-90 min, and finally the oxidized carbon-coated titanium dioxide nano-particles are obtained. The invention provides a surface oxidation technology for improving the adsorption performance of the lithium-sulfur battery, the porosity and the specific surface area of a carbon-coated nano material are effectively improved, the adsorption capacity on polysulfide is improved, and the cycling stability of the lithium-sulfur battery is improved. The method is simple to operate and easy to synthesize.

The invention discloses halloysite-loaded titanium dioxide composite modified polyurea as well as a preparation method and application thereof, and belongs to the technical field of insulating paints.The preparation method comprises the steps that titanium dioxide nanoparticles grow on the surfaces of halloysite nanotubes in situ through a controllable hydrolysis reaction of tetrabutyl titanate and glacial acetic acid in an ethanol system, and TiO2-HNTs powder is prepared; the preparation method comprises the following steps: copolymerizing polydimethylsiloxane and isophorone diisocyanate to form an isocyanate-terminated prepolymer, and further carrying out chain extension reaction on the isocyanate-terminated prepolymer and 1, 6-hexamethylenediamine to synthesize a polyurea copolymer; the TiO2-HNTs powder is dispersed in the polyurea copolymer and cured to obtain halloysite loaded titanium dioxide composite modified polyurea, and the material has excellent ultraviolet aging resistance and electrical stability and can meet long-period reliable operation of power transmission lines.

The invention relates to the field of biomimetic materials, in particular to a biomimetic self-cleaning anti-fouling aquaculture net cage material, a preparation method and application of the biomimetic self-cleaning anti-fouling aquaculture net cage material. 0.5 to 2.0 parts by weight of a carboxylated graphene nanosheet; 2.0 to 5.0 parts by weight of nitrogen-doped titanium dioxide nanoparticles; 1.0 to 3.0 parts by weight of silica nanoparticles; 5.0 to 10.0 parts by weight of calcium ion cross-linked modified sodium alginate; 1.0 to 3.0 parts by weight of octadecyl trichlorosilane; 0.5 to 1.5 parts by weight of lauryl sodium sulfate; through the synergistic effect of a double bionic structure and enhanced photocatalysis, the effective inhibition on attachment of various organisms is realized, and the inhibition rate on attachment organisms such as algae, bacteria and barnacles reaches 75% or above.

The invention discloses a roof component based on evaporation and radiation collaborative cooling and preparation and construction thereof. The roof component breaks through the limitation of a single cooling mode through a multi-layer structure coupling evaporative cooling and radiation cooling technology. The reflective film specifically comprises a base layer, an evaporation radiation synergistic cooling material layer and a reflective protection layer. The synergistic material layer is formed by modifying polyacrylamide hydrogel through lithium bromide moisture absorption salt, titanium dioxide nanoparticles are embedded to improve the short-wave reflectivity and long-wave emissivity, and the synergistic material layer has the functions of radiation cooling and moisture absorption evaporation; the reflective protective layer is made of polyvinylidene fluoride-hexafluoropropylene copolymer, so that radiation cooling power is supplemented and pollution is prevented on the premise of moisture permeability; the heat entering a room is reduced by combining an evaporation radiation synergistic cooling material and a reflection protection material; by means of the roof component based on evaporation and radiation collaborative cooling, the limitation of cooling power can be broken through, the cooling effect is enhanced, and the purpose of building energy saving is achieved.

The invention discloses a Micro-LED device based on a charge compensation method and a preparation method of the Micro-LED device, relates to the technical field of nano luminescent materials and display, and solves the problems that the luminous efficiency of the Micro-LED device is reduced, the driving voltage is increased, the service life of the device is shortened and the like due to reduction of the crystal size during Mn < 4 + > doped fluoride nanocrystalline through Mg < 2 + > charge compensation. The Micro-LED device sequentially comprises a driving substrate layer, a blue light Micro-LED array layer, a light extraction layer, a color conversion layer and a packaging layer from bottom to top; the light extraction layer is a titanium dioxide nanoparticle layer; the color conversion layer is a Micro-LED device formed by mixing a solution of dispersed silver silicon core shell-cesium sodium manganese fluoride composite nanomaterial Ag (at) SiO2 / Cs2NaF6: Mn < 4 + > and Mg < 2 + > nanocrystal particles with a methyl methacrylate solution and coating the mixture on a substrate. By introducing the Micro-LED color conversion layer based on the charge compensation method, lattice charge unbalance is neutralized, lattice defects are reduced, and formation of a Micro-LED device with high brightness and high stability is facilitated.

The invention discloses a method for detecting silicon dioxide in kaolin based on a nanoprobe. The method comprises the following steps: grinding a kaolin sample, mixing with deionized water, performing ultrasonic dispersion, and centrifuging to obtain a kaolin sample solution; the preparation method comprises the following steps: preparing titanium dioxide nano-particles with amino groups modified on the surfaces by adopting a hydrothermal method, and modifying a silane coupling agent on the surfaces of the nano-particles by adopting a chemical coupling method to form a functionalized nano-probe; adding the functionalized nanoprobe into a kaolin sample solution; the nanoprobe is combined with silicon dioxide in a sample to form a nanoprobe-silicon dioxide compound; collecting a nano probe-silicon dioxide compound; reacting the nanoprobe-silicon dioxide compound with a fluorescent marker, and combining the fluorescent marker with silicon dioxide in the compound; and detecting the fluorescence intensity, and calculating the content of silicon dioxide in the sample according to the standard curve. The method for detecting silicon dioxide in kaolin is high in sensitivity, high in selectivity, simple and convenient to operate and wide in application.

The application belongs to the technical field of sensitive materials, and discloses a high-performance TiO2@In2O3 / Pd sensitive film for a MEMS gas sensor, a synthesis method thereof and a MEMS gas sensor. The method comprises the following steps: synthesizing mesoporous TiO2 nanoparticle balls; mixing indium salt, an alkaline compound, a surfactant and the mesoporous TiO2 nanoparticle balls uniformly, and then performing hydrothermal reaction; centrifuging, washing and drying the product of the hydrothermal reaction, and then performing first annealing treatment in an air atmosphere to obtain In2O3-coated titanium dioxide nanoparticle balls TiO2@In2O3; modifying palladium nanoparticles to the nanoparticle balls TiO2@In2O3 by a solution method, centrifuging, washing and drying, and then performing second annealing treatment in a hydrogen atmosphere to obtain In2O3-coated titanium dioxide nanoparticle balls TiO2@In2O3 / Pd with Pd modification; and manufacturing the nanoparticle balls TiO2@In2O3 / Pd into a sensitive film. The sensitive film manufactured by the above method can improve the sensitivity of gas detection.

An electrocatalytic filter apparatus is provided for use with one or more of a heating, ventilating, refrigerating or air conditioning unit and a power source, the electrocatalytic filter apparatus comprising: a frame including a first side and a second side, each side including at least one aperture; a water inlet which is retained by the frame; a water outlet which is retained by the frame; at least two functionalized filters which are retained by the water inlet and the water outlet, are in parallel relation and are spaced apart to define an interstitial space which is in fluid communication with the water inlet and the water outlet, the functionalized filters including fiberglass or carbon fibers, wherein the functionalized filters are functionalized with low iron oxide, iron-doped titanium dioxide nanoparticles; an anode wire mesh which is retained by the frame and is disposed between the first side of the frame and one functionalized filter; a hydrogen gas generator, which is a second wire mesh anode, is retained by the frame and is disposed beside the second side of the frame; and a cathode wire mesh which is retained by the frame and is disposed between the second wire mesh anode and the other functionalized filter and is in parallel relation with the second anode wire mesh to define a channel which is fluid communication with the water inlet and the water outlet.

A wavelength conversion device (100) includes: a substrate (110), a reflective layer (120) on the substrate (110), and a wavelength conversion layer (130) on the reflective layer (120). The reflective layer (120) includes an adhesive (121) and reflective titanium dioxide nanoparticles (122). The nanoparticles (122) have a particle size of about 200 nanometers to about 500 nanometers. The reflective layer (120) has enhanced thermal stability. A method of manufacturing a wavelength conversion device is also disclosed herein.

The invention discloses a method for growing titanic acid / titanium dioxide nanoparticles on a titanium carbide Mxene sheet layer, and relates to a method for growing titanic acid / titanium dioxide nanoparticles on the surface of a titanium carbide Mxene sheet layer structure. The method comprises the following steps: firstly, etching titanium aluminum carbide at room temperature by adopting hydrofluoric acid to obtain a layered titanium carbide Mxene material, then dispersing the layered titanium carbide Mxene material in hydrogen peroxide with the mass percent concentration of 20-30%, simultaneously adding 0.6 ml of 65% nitric acid, and reacting for 24-72 hours at the temperature of 20-80 DEG C, so that titanic acid nanoparticles can grow on the surface of a titanium carbide Mxene lamellar structure; and subsequently carrying out heat treatment in an air atmosphere at 200-500 DEG C, and converting the titanic acid into anatase titanium dioxide. The preparation temperature is low without high pressure; the nanoparticles keep a lamellar structure aggregation state, and are expected to be applied to the fields of adsorption, photocatalysis and the like.

The invention provides an LED reflection cup coating and a preparation method thereof, and belongs to the technical field of composite coatings, and the preparation method comprises the following steps: dispersing zinc oxide nanoparticles and titanium dioxide nanoparticles in ethanol dissolved with polydimethylsiloxane, and mixing and stirring to prepare a ZnO / TiO2-PDMS mixed solution; under vacuum, argon is introduced, a pure titanium bottom layer is deposited on the surface of the pretreated substrate, then a Ti target and an Ag target are opened at the same time, after a titanium-silver layer is deposited, nitrogen is introduced, a titanium nitride-silver layer is deposited, the Ag target is closed, and after a titanium nitride layer is deposited, a composite substrate reflecting layer is obtained; and a ZnO / TiO2-PDMS mixed solution is dropwise added to the surface of the composite substrate reflecting layer, coating and baking are conducted, and the LED reflecting cup plating layer is obtained. According to the invention, high reflectivity is realized, and the sulfuration resistance and thermal stability of the plating layer are improved at the same time.

The invention discloses a visible light dual-wavelength polarization multiplexing metasurface hologram and a preparation method thereof, and relates to the technical field of micro-nano manufacturing. The super-surface hologram is composed of a super-atom array based on a nanoimprint technology, wherein the period of the super-atom array in the x direction and the period of the super-atom array in the y direction are 450 nm, and the height of the super-atom array is 800 nm. In the superatom array, all superatoms are of cuboid columnar structures, and a main body is composed of a polymer doped with titanium dioxide nanoparticles; the size and the position of each super atom are determined according to a GS algorithm; the GS algorithm is used for calculating the phase information of the target image under the polarized light with the corresponding wavelength; the wavelength polarized light comprises X polarized light of 532 nm and Y polarized light of 671 nm. According to the method, the problems of long manufacturing process period, small scale, high cost and the like of a traditional metasurface device can be solved, and a new development thought is provided for a multi-color imaging technology based on metasurface holography.

The invention relates to the technical field of new materials, and discloses a three-layer structure multifunctional ionic elastomer and a preparation method and application thereof. The three-layer structure multifunctional conductive elastomer is formed by compounding three layers, the bottom layer is prepared from octadecyl methacrylate, 4-hydroxybutyl acrylate and polyurethane diacrylate, and the bottom layer has the performance of adhesion / desorption according to needs through temperature stimulation; the middle layer is prepared from 1-butyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide, butyl acrylate, tridecafluorooctyl methacrylate and polyethylene glycol diacrylate, so that the elastomer has ionic conductivity; and the surface layer is formed by fluorine-containing titanium dioxide nanoparticles, so that the elastomer has super-hydrophobic and self-cleaning capabilities. The elastic body can serve as a sensor to monitor movement of a human body and be used for underwater information transmission. The multifunctional ionic elastomer with the three-layer structure can meet the requirements of various scenes, such as wearable equipment, electronic skin, underwater sensors and waterproof materials.

The invention provides sulfonated lignin / titanium dioxide nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of lignin materials. The preparation method comprises the following steps: sequentially mixing formaldehyde and sodium sulfite in a dealkalized lignin alkaline solution, and then sequentially performing dialysis, rotary evaporation and drying to obtain sulfonated dealkalized lignin; mixing the sulfonated dealkalized lignin in water to obtain a sulfonated dealkalized lignin solution; and mixing the tetrabutyl titanate dispersion liquid in the sulfonated dealkalized lignin solution, carrying out a hydrothermal synthesis reaction, and drying the product to obtain the sulfonated lignin / titanium dioxide nanoparticles. The sulfonated dealkalized lignin / titanium dioxide nanoparticles prepared by the method can be used as an anti-ultraviolet agent to improve the weather resistance of waterborne polyurethane, and the result of the method is expected to expand the potential application and optimization strategy of a lignin-based nano composite material.

The invention discloses a radiation refrigeration material, a preparation method and a preparation device, and the radiation refrigeration material comprises a primer layer, a middle paint layer and a finish paint layer, the primer layer is doped with titanium dioxide nano particles; the middle paint layer is doped with aluminum oxide or barium sulfate nanoparticles; and the finish paint layer is doped with silicon dioxide nanoparticles and a fluorescent material. The preparation method of the radiation refrigeration material comprises the following steps: S1, respectively preparing the primer, the intermediate paint and the finish paint through weighing, stirring, grinding and filtering processes; s2, the surface of an object is coated with primer, and a primer layer is formed; s3, the surface of the primer layer is coated with intermediate paint, and an intermediate paint layer is formed; and S4, the surface of the middle paint layer is coated with finish paint to form a finish paint layer. The radiation refrigeration material preparation device comprises a stirring barrel, a stirring shaft and a feeding pipe. According to the scheme, the spectral selectivity, durability, environmental friendliness and attractiveness of the refrigeration material can be effectively guaranteed.

This invention relates to a method for preparing a high-durability transparent cooling self-cleaning coating for the protection of stone cultural relics, comprising the following steps: (1) dispersing silica nanoparticles, titanium dioxide nanoparticles and zinc oxide nanoparticles in a mixed solution and ultrasonicating to obtain a mixed dispersion; (2) dispersing silica nanoparticles in the mixed solution and ultrasonicating to obtain a dispersion containing only silica nanoparticles; (3) adding silane coupling agent and hydrochloric acid to the mixed dispersion and silica dispersion respectively to obtain solution A and solution B; (4) adding water-diluted aqueous emulsion to solution B to obtain an adhesive layer solution for spraying; (5) ultrasonicating the adhesive layer solution and spraying it onto the sample, allowing it to cure naturally; (6) ultrasonicating solution A and continuing to spray it onto the sample; (7) drying the sprayed sample at room temperature to obtain a transparent superhydrophobic coating; the coating has high light transmittance and excellent hydrophobicity, oleophobicity and self-cleaning properties.

The invention provides a modified titanium dioxide nanotube and a preparation method thereof, a water electrolysis catalytic electrode and a preparation method thereof, and a water electrolysis hydrogen production device. The preparation method of the modified titanium dioxide nanotube comprises the following steps: S1, mixing titanium dioxide nanoparticles with a first alkali solution to obtain a titanium dioxide nanoparticle dispersion liquid, heating the titanium dioxide nanoparticle dispersion liquid for reaction, washing a reaction product with acid, ethanol and water, and performing high-temperature annealing to obtain a TiO2 nanotube; and S2, aluminum powder and the TiO2 nanotube are placed on the upstream and downstream of gas of a tubular furnace correspondingly, modified annealing treatment is conducted, and the modified titanium dioxide nanotube is obtained. The catalytic activity of the titanium dioxide nanotube is obviously improved, the conductivity of the titanium dioxide nanotube is obviously improved while the stability of the material is guaranteed, the titanium dioxide nanotube is applied to a catalytic electrode, the electrode can have good chemical stability, corrosion resistance and conductivity, and the overall performance of the catalytic electrode is obviously improved.

A light-emitting device includes a first electrode, a second electrode, a light-emitting layer, and a composite material layer. The first electrode and the second electrode are arranged oppositely to each other. The light-emitting layer is arranged between the first electrode and the second electrode. The composite material layer is arranged between the second electrode and the light-emitting layer. A material for forming the composite material layer includes a titanium dioxide nanoparticle and a ligand. The ligand has a structure ofThe ligand is bonded to the titanium dioxide nanoparticle by a sulfur anion. n is an integer of 0˜8.

The present invention discloses a method for achieving corrosion resistance treatment on the surface of titanium alloy by means of laminated ironing and electrodeposition. First, the surface of the titanium alloy substrate is subjected to laminated ironing to form a nanocrystalline transition layer on the surface, increasing the dislocation density and introducing appropriate internal stress, effectively enhancing the surface residual stress of the titanium alloy. Then, the surface is polished at low frequency to obtain a reasonable surface roughness and improve the electrochemistry deposition reaction activity. Then, electrochemical deposition surface treatment is carried out. Sodium sulfate, methanol and titanium dioxide nanoparticles are added to the electrochemistry deposition solution to improve the deposition efficiency of the electrochemistry coating. The method of the present invention improves the corrosion resistance of the titanium alloy. The electrochemical impedance is increased by two orders of magnitude, the corrosion potential is shifted positively, the corrosion current density is reduced by two orders of magnitude, and the integrity of the electrodeposition coating is improved, reducing the coating defects.

The invention discloses a composite flocculant and a preparation method and application thereof, and relates to the technical field of flocculants.The preparation method of the composite flocculant comprises the following steps that S1, titanium dioxide nanoparticles are dispersed in a mixed solvent, then aminopropyltriethoxysilane is added for surface modification, and dispersion liquid is obtained; s2, sequentially adding polydopamine and chitosan into the dispersion liquid prepared in S1 under a heating condition, and continuously stirring to prepare a composite material through a Schiff base reaction; s3, centrifuging, washing and drying the composite material prepared in S2 to obtain a composite flocculant; the invention also provides the composite flocculant prepared by the method and application of the composite flocculant in treatment of sewage containing diclofenac sodium.

This invention relates to the field of self-cleaning coating materials, and discloses the preparation and application of a nanofiber-confined Fe single-atom self-cleaning coating material. The invention uses wood nanofibers as a carbon-based carrier to obtain nanofiber-confined Fe single-atom materials. The three-dimensional network structure generated during the acidic hydrolysis of methyl orthosilicate enhances the bonding between the nanofiber-confined Fe single-atom materials, nano-silica, and nano-titanium dioxide nanoparticles. After hydrolysis, a diluent is added, and the reaction proceeds to obtain the nanofiber-confined Fe single-atom self-cleaning coating material. This self-cleaning coating material has a simple process, high operability, excellent antistatic properties, superhydrophilicity, and photocatalytic activity. It exhibits excellent anti-fouling potential in self-cleaning coating material applications and has broad application prospects.