208 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 electrochemical catalysis, in particular to a preparation method and application of a bifunctional Schottky heterojunction type water electrolysis catalyst, the bifunctional Schottky heterojunction type water electrolysis catalyst comprises titanium dioxide nanoparticles and transition metal doped ruthenium oxide nanoparticles, and the titanium dioxide nanoparticles and the transition metal doped ruthenium oxide nanoparticles are connected through a Schottky heterojunction; the content of ruthenium oxide in the catalyst is 1%-20%, and the content of transition metal in the catalyst is 0.1%-5%. Titanium dioxide and transition metal doped ruthenium oxide are compounded by using a sol-gel method to form a catalyst with a unique Schottky heterojunction structure, and a built-in electric field formed by Schottky heterojunction promotes spontaneous transfer of charges, optimizes charge distribution, reduces reaction energy consumption, improves water electrolysis reaction efficiency, and is suitable for industrial production. And meanwhile, the consumption of noble metal ruthenium is reduced, and the production cost is reduced.

The invention provides an anti-fog self-cleaning titanium dioxide composite sol coating and a preparation method thereof.Pre-crystallized titanium dioxide nanoparticles are prepared through a sol-gel method and mixed with silicon dioxide sol to obtain composite sol, a film can be formed on the surface of a glass and plastic substrate material, and the coating of a porous structure is obtained; the titanium dioxide is pre-crystallized and can be uniformly dispersed in an aqueous solution, and the surface of the titanium dioxide has a large number of hydrophilic groups such as hydroxyl, so that the conditions of ultraviolet pretreatment, high-temperature calcination and the like are not needed, and the coating has super-hydrophilic anti-fog self-cleaning performance after being formed into a film in manners of spraying, pulling, roller coating and the like, and can be applied to a heat-labile plastic surface; and the whole process has the advantages of low cost, large-area treatment and the like. The coating is high in water resistance, good in weather resistance, good in adhesive force on the surfaces of various materials and not prone to falling off.

The invention relates to a preparation method of a TiO2-coated SiO2 material, and relates to the technical field of nano materials, and the preparation method is characterized by comprising the following steps: modifying titanium dioxide nanoparticles by using CTAB (Cetyltrimethyl Ammonium Bromide), then adding TEOS (Tetraethyl Orthosilicate) into a mixture to complete a silicon dioxide coating reaction, and then calcining to obtain a densified TiO2-coated SiO2 material; cTAB (cetyltrimethylammonium bromide) is used as a template agent and a surfactant to help to form a uniform SiO2 coating layer, the dispersity of TiO2 particles in a reaction medium is improved, the agglomeration of the TiO2 particles is prevented, and the SiO2 coating layer enhances the absorption of visible light, increases the specific surface area of the material and provides more active sites, so that the photocatalytic efficiency of the material is improved.

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 discloses a nanometer material-based postoperative wound intelligent healing patch preparation method, which comprises: S1, preparing a temperature response layer, and compounding PNIPAM with surface-modified zinc oxide nanoparticles; s2, preparing a pH response layer, and compounding chitosan with the surface modified titanium dioxide nanoparticles; s3, a humidity response layer is prepared, and release of silver ions is optimized by adopting a PEGDA and silver nanoparticle composite material; s4, assembling the layers layer by layer through an electrostatic spinning technology or a lamination technology, and controlling process parameters in combination with meta learning and transfer learning to complete preparation of an overall structure of the patch; s5, embedding temperature, pH and humidity sensors, and constructing a sensor data set; s6, the drug release rate and the material phase change behavior are dynamically adjusted, and accurate response is achieved; and S7, after patch preparation is completed, combining Bayes and a multi-objective evolutionary algorithm to optimize sterilization parameters. The intelligent healing patch is prepared by combining a nano material with an intelligent algorithm, and real-time environmental response is realized.

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 present invention relates to the technical field of stone-like paint research and development, and discloses a thick paste type composite stone-like paint and a preparation method, the thick paste type composite stone-like paint is composed of a composite primer, a stone-like paint main paint, and a finishing paint, wherein the preparation method of the finishing paint includes: synthesizing a light-stable coupling monomer and a light stabilizer; modifying titanium dioxide nanoparticles using a light-stable coupling monomer and / or a light stabilizer to prepare light-stable titanium dioxide nanoparticles; based on π-π stacking, the light-stable titanium dioxide nanoparticles are subjected to a composite treatment of graphene nanosheets modified with trimethoxy (2-phenylethyl) silane to prepare a graphene-titanium dioxide composite material; modifying the finishing paint by the graphene-titanium dioxide composite material to prepare a composite finishing paint. The present invention provides a method for preparing a finishing paint, and prepares a finishing paint with excellent weather resistance.

The invention belongs to the field of air purification, and particularly discloses a single-layer nanofiber membrane with a directional liquid transmission function and a preparation method thereof.The preparation method comprises the steps that polyacrylonitrile is added into N, N-dimethylformamide to obtain a spinning solution A1, and titanium dioxide nanoparticles are added into N, N-dimethylformamide to obtain dispersion liquid A2 of the titanium dioxide nanoparticles; a2 is added into A1, and a spinning solution B1 is obtained; b1, preparing a hydrophilic composite nanofiber membrane through an electrostatic spinning method, and adding a perfluoro reagent into cyclohexane to obtain a perfluoro modified solution; the preparation method comprises the following steps: immersing a hydrophilic composite nanofiber membrane into a modified solution, sealing and dipping in a dark place, taking out and drying to obtain a hydrophobic composite nanofiber membrane, placing the hydrophobic composite nanofiber membrane in a dark closed space, and irradiating under an ultraviolet lamp to obtain a single-layer nanofiber membrane with a directional liquid transmission function; the obtained nanofiber membrane has the characteristics of excellent one-way moisture conduction capability, good air permeability, high filtering efficiency and the like.

The invention discloses a preparation method and application of an oil-water separation film, and belongs to the technical field of oil-water separation.The preparation method comprises the following steps that 1, tetrabutyl titanate is subjected to hydrolytic annealing treatment, and titanium dioxide nanoparticles with the surfaces rich in hydroxyl are obtained; step 2, modifying the titanium dioxide nano-particles rich in hydroxyl groups to obtain silanized titanium dioxide nano-particles; 3, the silanized titanium dioxide nanoparticles are placed in a mixed solvent, ultrasonic dispersion is carried out for 10 min, a homogeneous precursor solution is obtained, polylactic acid is added, stirring dispersion is carried out until the solution is transparent, a spinning solution is obtained, electrostatic spinning is carried out on the spinning solution, and the oil-water separation film is obtained.The obtained oil-water separation film has the excellent oil-water separation characteristic. In addition, the oil-water separation membrane can effectively purify oil-containing wastewater, and can be naturally degraded after the service life is ended, so that the negative influence on the environment is reduced to the greatest extent.

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 discloses a photocatalytic aquatic plant fiber for improving the water quality of a flowing water body and a preparation method of the photocatalytic aquatic plant fiber. The fiber is composed of a photocatalytic active component group, a function enhancing component group and a fiber base material component group. The photocatalytic active component is nitrogen carbide and titanium dioxide nanoparticles, the function enhancing component is Zn < 2 + >, Cu < 2 + > and Co < 2 + > metal ions, and the base material is polypropylene, non-woven fabric and cotton fiber. Nitrogen carbide is modified through temperature-sensitive calcination and acid pickling and is combined with titanium dioxide to form a composite photocatalytic material, and metal ions are attached through a multi-time soaking method. In the preparation process, fibers are soaked in the material and dried at high temperature, and uniform attachment of the photocatalytic material is ensured. The fiber can efficiently degrade organic pollutants in a flowing water body, and is suitable for purifying water bodies such as rivers and lakes.

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.

An electrocatalytic reactor is provided for use with a power source for remediating polluted water, the electrocatalytic reactor comprising: a first electrode which includes a titanium metal core, a titanium dioxide layer on the titanium metal core, which includes an outer surface and low iron oxide, iron doped titanium dioxide nanoparticles which are bound to the outer surface of the titanium dioxide layer; a second electrode which includes a titanium metal core, the second electrode in electrical communication with the first electrode; and a vessel in which the first electrode and the second electrode are housed, the vessel configured to at least transiently retain the polluted water.

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.