719 results about "Titanium dioxide thin film" patented technology

The invention relates to a carbon nanofiber load titanium dioxide thin film anode material and a preparation method thereof, and solves the technical problems that nano-scale titanium dioxide is reunited and inactivated easily during recycling of a lithium ion battery, and the conductivity is low. The carbon nanofiber load titanium dioxide thin film anode material comprises carbon nanofibers and titanium dioxide, wherein the mass of the titanium dioxide is 10 to 30 percent of the total mass of the thin film anode material. The carbon nanofiber load titanium dioxide thin film anode material which is prepared by the method and has a one-dimensional nano structure has relatively high specific capacity, high charging and discharging speed and high recycling stability and can completely use the advantages of the carbon nanofibers and the titanium dioxide.

The invention relates to a method for preparing titanium dioxide films for a dye-sensitized solar battery, comprising the following steps: (a) titanium dioxide sol with 1-10 wt percent of titanium dioxide, 5-10nm of grain size and 10-100mg/mL of concentration and titanium dioxide powder with 5-15 wt percent of titanium dioxide and 20-40nm of grain size are uniformly ground, 80-90 wt percent of pore-forming agent is added, and the obtained 100wt percent of mixture are grounded for 0.5-2 hours; (b) titanium dioxide slurry is coated on conductive glass and is dried for 5-15 minutes at 100-130 DEG C; and (c) the conductive glass coated with the titanium dioxide slurry is sintered for 0.5-2 hours at 450-500 DEG C; by adopting the method in the invention, the process is simple, the operation is easy, the preparation period is short, thereby being beneficial to industrialization; in addition, the photoelectricity conversion efficiency of the dye-sensitized solar battery assembled by the titanium dioxide films is high by adopting the method.

The present invention concerns the deposition of fluorine modified, titanium dioxide films (TiO2) onto hot glass by atmospheric pressure chemical vapor deposition (APCVD) using TiCl4 vapor. The invention is also suitable for depositing other metallic oxide films from their metallic halides such as SnCl4, GeCl4, and VCl4. The present invention provides a process that deposits a novel, fluorine modified, titanium dioxide film (TiO2) onto hot glass by atmospheric pressure chemical vapor deposition using TiCl4 vapor. The process uses injection of TiCl4 into a hot, nonoxygen containing carrier gas and blends the carrier gas and TiCl4 vapor with an oxygen containing gas stream containing a haze reducing quantity of a fluorine containing compound before contacting a surface of hot glass with the blended mixture. The process is capable of depositing a fluorine modified, TiO2 film at deposition rates exceeding 900 Å per second. The crystalline phase of the fluorine modified film is essentially anatase. The film has a haze of less then 1% and a refractive index of greater than or equal to about 2.48. Also provided is an apparatus for practicing the process and a novel coated glass.

The invention relates to a method for preparing a one-dimensional photonic crystal film on the fabric surface to realize a structural color. The method comprises preparation of titanium sol and silica sol and alternate forming of a titanium dioxide film layer and a silicon dioxide film layer on the fabric surface. The structural color can be formed on the fabric surface by adopting the method. The results show that variation of the surface color of the fabric treated by the method can be observed from different angles and the structural color effect is generated. The synthetic method and required production equipment are simple, are easy to realize industrial production and have great reference significance in reducing the environmental pollution of the dyeing industry. The prepared fabric dispenses with any dye to realize the structural color and has excellent optical property and good application prospect.

The present invention provides a method for preparing mesoporous TiO2 thin films with high antibacterial and photocatalytic activities. The method involves coating onto a substrate a TiO2 sol-gel prepared from hydrolysis and condensation of titanium alkoxide in the presence of a stabilizer and thermally treating the substrate at a temperature ranging from 400° C. to 900° C. The TiO2 thin films fabricated according to the method of the present invention show two times higher antibacterial and photocatalytic activities than the conventional TiO2 thin films.

The invention belongs to functional material technology and glass processing field, concretely discloses a permanent self-cleaning glass with visible light response and method for making it. Firstly, sputtering silica dioxide film on the surface of glass, sputtering a layer of titanium oxide film with anion and cation codoping on the surface of silica dioxide film, annealing the glass with twin layer films at 500-600 DEG C, cooling by radiation in sintering stove, to get the product. The self-cleaning glass has good photocatalysis property and photo-induced hydrophilicity, stable performance, almost perpetual availability, high light transmittance ratio and transparency. It is widly used in glass curtain wall of skyscrapers, automobile glass, road lamp shade, kitchen galss and antifog glass, avoiding artificial cleaning indoor and outdoor glass of skyscrapers, saving manual power and material, reducing corrosion destruction of cleaning agent to glass and building machinery, embodying environment protection notion.

The process of preparing photocatalytic self-cleaning enamel includes the following steps: 1. preparing enamel clinker with enamel material quartz, feldspar, borax, etc, through mixing, smelting in a crucible, water quenching and stoving; 2. mixing enamel clinker with clay, dielectric and deionized water, grinding, sieving and stoving to form the enamel; 3. derusting and degreasing steel plate or iron casting, stoving, coating the enamel, stoving and firing to form enameled plate; and 4. soaking the enameled plate in titania colloid solution, vertically drawing, stoving and sintering to form enameled plate with titania film. The process is simple and low in cost, and the prepared self-cleaning enamel material has excellent photocatalytic performance and high chemical stability.

Titania is a semiconductor and photocatalyst that is also chemically inert. With its bandgap of 3.0, to activate the photocatalytic property of titania requires light of about 390 nm wavelength, which is in the ultra-violet (UV), where sunlight is very low in intensity. A method and devices are disclosed wherein stress is induced and managed in a thin film of titania in order to shift and lower the bandgap energy into the longer wavelengths that are more abundant in sunlight. Applications of this stress-induced bandgap-shifted titania photocatalytic surface include photoelectrolysis for production of hydrogen gas from water, photovoltaics for production of electricity, and photocatalysis for detoxification and disinfection.

The present invention relates to a titanium dioxide photocatalysis air-cleaning film and its preparation method. It is characterized by that it utilizes the megnetron sputtering to form titanium dioxide photocatalysis air-cleaning film on the carriers of glass, metal and ceramics. It uses the direct synthesis of pure metal titanium target material and oxygen gas and utilzies are controlling power supply to prevent pure metal target material from poisoning, in which the crystal grains formed by titanium dioxide film can be grown along the vertical direction or horizontal direction of carrier. The grain size is 10-100 nano, and the thickness of the film is 20-100 nano. Said titanium dioxide film is formed from single anatase phase or single rutile phase or their mixed phase, in which the anatase content is 50%-98% and rutile phase content is 2%-50%. Said film can effectively degrade harmful gases of formaldehyde and phenol, etc.

The method for preparing high-activity titanium dioxide film self-cleaning glass material, applicable to the fields of building glass, car glass and optical glass, uses general glass as base body forcoating film and includes the following steps: cleaning glass surface, drying, sweeping with nitrogen gas, sol preparation, impregnating and coating, drying, crystallization heat treatment, pickling and surface after-treatment. The sodium ion content of titanium dioxide film can be controlled in 0.3%, carbon content of film surface is reduced, surface hydroxy content is increased and the optical catalytic activity of glass can be greatly raised. Said invention adopts line production process, and can effectively control product quality.

The invention relates to a nitrogen doped titanium dioxide film of hydrophobicity and ultraviolet resistance, and its preparation. The character of film lies in that nitrogen exists in titanium dioxide crystal lattice in substitution and clearance mode, still a portion of Ti exist in Ti<3+> ion mode. film crystallization may be red schorl, anatase and amorphism. Titanium dioxide film prepared using direct current and radio-frequency magnetron sputtering method has good hydrophobic effect. Contact angle of film to distilled water is 97-110 DEG, ultraviolet cut-off wavelength is above 390nm, and visible light average transmittance is 70%-80%. Hydrophobicity of film is not influenced by film exposition time in air. The invention is easily operated, and the film thickness and composition can be controlled. Nitrogen doped hydrophobic film can be prepared for sample of different specification, material quality, and shape.

The invention discloses a method for preparing a nano porous titanium dioxide thin film doped with Pd by a constant voltage dealloying method on a Ti-Cu-Pd amorphous alloy stripe, in order to provide a novel Pd-TiO2 composite electrode catalyst. A nano porous thin film structure with uniform pore distribution is prepared by steps of adopting a traditional electrochemical three-electrode system, using nitric acid solution as an electrolyte solution, and respectively applying a constant voltage to the amorphous alloy stripe to realize constant voltage electrochemical corrosion by Gamry Reference 600 electrochemical workstation. The method is low in implementation cost, simple and convenient to operate, strong in controllability, good in repeatability and low in reaction temperature, so that the method is an efficient and economic synthesis method.

The invention discloses a method for preparing nano silver and titanium dioxide thin films on the surfaces of hollow glass beads, which comprises the following steps of: I, firstly coating a nano silver thin film on the surface of a hollow glass bead by using a chemical plating method; and II, then directly coating a layer of nano titanium dioxide thin film on the surface of the hollow glass bead coated with the nano silver thin film by using a hydrothermal method. The method disclosed by the invention has the advantages of raw material saving, simplicity and convenience in operation, good binding strength, higher photocatalytic activity and the like, and endows hollow glass beads with a photocatalytic degradation property for dyes and organic pollutants.

The invention discloses a direct vertical deposition method of a zinc oxide nanometer rod array on a titanium dioxide film, wherein the zinc oxide is an important inorganic semiconductor function material and arouses wide public concern due to the unique performances of catalysis, electricity, optics and photochemistry, and the like. Persons are interested in the control synthesis of one-dimensional zinc oxide due to the remarkable laser behavior of the one-dimensional zinc oxide. The method comprises the steps of: preparing titanium dioxide sol under room temperature; preprocessing; adhering with one layer of titanium dioxide sol on a preprocessed glass or an electric glass ITO by means of dipping and pulling; preprocessing titanium dioxide grains before drying and spinning; fixing a layer of titanium dioxide grains prepared by means of a sol-hydrothermal method on the substrate by means of spinning; drying; roasting to obtain the nanometer zinc oxide film; putting the zinc oxide film into a sealed water solution system of zinc salt and organic amine; reacting for 12-72 h under the reaction temperature of 45-90 DEG C; taking out; washing with secondary water; and drying. The invention relates to a nanometer material.

The invention discloses a double-layer anti-reflective film for a crystalline silicon solar battery, which is formed by two layers of films, wherein the first layer of film is arranged on the surface of a silicon wafer substrate of the crystalline silicon solar battery, and the second layer of film is arranged on the surface of the first layer of film; the first layer of film is a silicon dioxide film, the thickness of the silicon dioxide film is 10-20nm, and the refractive index of the silicon dioxide film is 1.45-1.47; and the second layer of film is a titanium dioxide film, the thickness of the titanium dioxide film is 50-60nm, and the refractive index of the titanium dioxide film is 2.15-2.45. The anti-reflective film of the invention can obviously reduce the reflection of the surface of the battery to light, and can improve the photoelectric conversion efficiency of the crystalline silicon solar battery.

The present invention relates to composite oxidation process for surface modification of metal. The composite oxidation process includes first anode oxidation to from compact anatase titania film on the surface of substrate, then micro arc oxidation to form porous calcium and phosphorus containing anatase or mixed anatase-rutile titania coating on the surface of the film. The coating substrate is titanium or titanium alloy and the coating is one gradient structure comprising inner compact layer and surface porous uneven layer. Clinical practice shows that the compact titanium film can inhibit effectively the leaching out of harmful metal ion to body fluid, the surface porous structure is favorable to the growth of bone tissue, the adhesion between the bone tissue and the implant and the cell proliferation, and the calcium and phosphorus elements are favorable to forming bone-like hydroxyapatite in body fluid.

The invention belongs to the field of a precious metal doped oxide semiconductor thin film material and in particular relates to an Ag/TiO2 thin film material and a preparation method thereof. The invention is mainly characterized in that a sol-gel method and a solvent thermal synthesis method are combined, a TiO2 seed layer is prepared on the surface of a substrate by adopting the sol-gel method, and then a Ag/TiO2 nano slice is grown on the surface of the substrate of the TiO2 seed layer by adopting the solvent thermal synthesis method, thus the Ag/TiO2 thin film material which is composed of the Ag/TiO2 nano slice and is vertically grown on the substrate is obtained. The Ag/TiO2 thin film material provided by the invention has the advantages of titanium dioxide semiconductor material and silver and plays an important role in the fields such as antibacterial materials, solar cells, photocatalysis, deodorization, self cleaning and the like.

The invention belongs to the technical field of laser-Raman spectrum detection appliances and Raman spectrum analysis and detection, and in particular relates to a recyclable surface-enhanced Raman-spectrum active substrate with low cost and good reproducibility, and a preparation method thereof. The substrate is characterized in that a porous titanium dioxide film is loaded on the surface of a carrier base sheet through a dipping and lifting method, and then gold nanoparticles grow on the surface of the titanium dioxide film. The composite substrate has an outstanding surface enhanced effect; and chemical compound molecules absorbed on the surface of gold in a previous Raman experiment can be effectively removed through ultraviolet irradiation, and thus the substrate can be recycled.

The invention discloses a titanium dioxide thin film with a dual-layer nano-ordered structure, and the dual-layer thin film is formed by covering an upper layer of quasi-aligned single crystal rutile phase titanium dioxide nano-short rod thin film on a lower layer of aligned anatase nanotube thin film. The invention cleverly utilizes gap in a nano-rod array to provide a channel for ion diffusion to further avoid the restrictions of heterogeneous nucleation dynamic factors, adopts the inner anode oxidation method to successfully prepare the dual-layer thin film consisting of two layers of nano-ordered structure thin films according to the sequence of firstly preparing the upper layer and then preparing the lower layer, and the formed film has good quality, high purity, controlled structure and reference significance for preparing the similar thin film with the nano-ordered structure. The prepared titanium dioxide thin film with the dual-layer nano-ordered structure is expected to be widely applied in thin film solar cells, gas sensors, photocatalysis, photoelectrocatalysis and other fields.

A process for preparing TiO2 film at room temperature includes such steps as evaporating metal titanium on electrically conductive substrate by vacuum sputter method and electrochemically oxidizing it. The resultant film has nano-class minipore structure and can generate photocurrent and photovoltage. After it is sensitised by dye, it can be used for solid-state or liquid-state solar battery.

The invention belongs to the technical field of TiO2 photo-catalysis, and in particular relates to a method for preparing a co-doping nanometer TiO2 film with an adjustable content ratio of C to N. The method comprises the following steps: firstly preparing a TiCN film with adjustable C and N components by a reaction magnetron sputtering coating method, and then processing the TiCN film by a common thermal oxidization method to prepare the C and N co-doping nanometer TiO2 film; and main equipment are a magnetron sputtering coating system and a muffle. In the prepared film, the relative contents of the C and the N can be controlled by adjusting the area ratio of C to Ti and the volume ratio of N to Ar in a target. The film has good activity of water splitting; and photo-catalysis test results show that the film has obvious activity of photocatalysis and degradation of methylene blue, and can be applied to photocatalysis and degradation of organic pollutants.

The present invention discloses a Tio2 film adulterated with rare earth, wherein the molecule percentage content of titanium and rare earth are as follows: titanium 85%-99%, rare earth 1%-15%. The preparation of the film adopts normal pressure thermal decomposition chemical vapor deposition method, wherein a propodosoma combination is deposited onto a glass substrate. The Tio2 film adulterated with rare earth of the present invention has excellent photocatalysis activity, hydrophilicity and optical property, and can be widely used for glass external wall, indoor decorating, etc,. The present invention greatly enlarges the application area of Tio2 film, and is hopeful for generating great economy, environment and social benefits.

The invention is a method of preparing TiO2 film on metallic Ti surface, after washing Ti surface, soaking Ti in 60-90 deg.C 12-30m%-concentration hydrogen peroxide water solution for 24-72 hours, thus preparing an anatase crystal shaped nano TiO2 film. The prepared Ti sheet or plate covered with the nano TiO2 film: the film binds with the Ti plate or sheet firmly and the film crystallizes well, and it is able to say that the anatase crystal shape or the anatase and rutile mixed crystal shape has fine crystal particles, about 10 nanometer, large specific area and long service life.

The invention discloses a preparation method of sliver/titanium dioxide film materials used for blue-ray holographic storage, and belongs to the field of optical information storage material preparation. The preparation method comprises the following steps: preparing a titanium dioxide film, tannin acid solution of which the pH (Potential Of Hydrogen) value is 8.5, silver nitrate solution and a titanium dioxide film attached with tannin acid, obtaining a sliver/titanium dioxide film with a water bath heating method, and carrying out a spectrum test and holographic storage on the sliver/titanium dioxide film. According to the preparation method, the tannin acid is used as reductant to obtain the sliver/titanium dioxide film materials. Through the detection of an absorption spectrum, compared with a traditional preparation method, the preparation method has the advantages of strong adsorption at a position of short wave and narrow absorption peak and is suitable for the holographic storage of short-wave light. The observation of a kinetic curve of holographic grating growth proves that the efficient and quick holographic storage of short-wavelength blue ray can be realized by the sliver/titanium dioxide film materials prepared with the preparation method.

The invention discloses a plasma nano photocatalysed air purifying and sterilizing device for an air-conditioning system. A plasma purifying module used for purifying air is arranged at a return air inlet of the air-conditioning system and is provided with a shell connected with the return air inlet of the air-conditioning system, wherein a dust collecting plate forming an electric field and a discharge serration plate are arranged in the shell; the two poles of the electric field are connected with a micropulse AC/DC superimposed plasma power supply; and an insulating barrier layer with a high specific surface area and high catalytic oxidation is uniformly coated on a plate electrode. The insulating barrier layer is a titanium dioxide thin film with the high specific surface area and the high catalytic oxidation. In the purifying device, the plate electrode of the electric field is made of a titanium dioxide nano material to form the titanium dioxide thin film with the high specific surface area and high oxidability; and the purifying device disinfects, sterilizes and degrades organic exhaust gas by using nitrogen ultraviolet wavelength released and generated by plasma discharge to activate to generate high-performance active radicals.

The method for raising optical catalytic activity of titanium dioxide film self-cleaning glass is applicable to the fields of building window, car glass and optical glass, uses glass as base body forcoating film and includes the following steps: using sol-gel method to prepare titanium dioxide film, impregnating glass surface and coating film, acid treating surface of titanium dioxide film, washing with water and drying, the sodium ion of titanium dioxide film surface can be controlled in 0.3%, carbon content of film surface is reduced, hydroxy content of surface is increased, so that the optical catalytic activity of the glass can be greatly raised. It features signal method, effective and easy-to-control glass quality.