254 results about "Titanium tetraisopropoxide" patented technology

The invention relates to a carbon nitride/titanium dioxide nanosheet array heterojunction photocatalyst and a preparation method, belonging to the technical field of photocatalysis of nanometer materials. The catalyst is prepared through the following steps: with g-C3N4 as a carrier, titanium isopropoxide as a titanium source, diethylenetriamine as a morphology controlling agent and isopropanol as a solvent, performing a solvothermal method so as to prepare a g-C3N4/TiO2 precursor, and carrying out calcination treatment so as to obtain a g-C3N4/TiO2 nanosheet array heterojunction composite photocatalyst for the first time. The heterojunction composite photocatalyst shows pure and significantly-improved photocatalytic hydrogen production activity to g-C3N4 and anatase TiO2 nanosheet mesoporous spheres in a photocatalytic hydrogen production reaction. The preparation method has the advantages of simple and convenient operation, easy control, greenness, environmental protection and good application prospects. The series of catalysts has multilevel structure; and a g-C3N4/TiO2 nanosheet array heterojunction structure is formed through vertical and staggered growth of anatase TiO2 nanosheets with regular shape and uniform size on the surface of g-C3N4. The catalyst has excellent photocatalytic hydrogen production activity, good stability, high repeatability and facilitation large-scale production.

The invention relates to a method for performing surface modification on a polytetrafluoroethylene (PTFE) separation membrane, belongs to the field of membrane materials, and solves the problems of poor hydrophilicity, small flux, high probability of pollution and complex modification process existing in the polytetrafluoroethylene separation membrane. In the method, an oxide thin layer is continuously deposited on the surfaces of PTFE separation membrane pore paths by using an atomic layer deposition technology, so that precise adjustment and control over the aperture and the surface property of the separation membrane are realized. The method mainly comprises the following specific steps of: (1) controlling certain reaction temperature, and keeping the membrane into a reaction chamber for a period of time; (2) sequentially introducing trimethyl aluminum, titanium tetrachloride or titanium isopropoxide, cleaning gas and vapor or ozone and cleaning gas into the reaction chamber; and (3) preparing an organic/inorganic composite membrane with different cycle indexes according to requirements. By using the method, the hydrophilicity, the pure water flux and the anti-pollution capacity of the PTFE separation membrane are greatly improved; the method has a simple process; and the property is kept for a long time.

The invention discloses an anti-ferroelectric membrane with adjustable working temperature area and large heat-releasing rate, and the method for preparing the same and its application. It applies sol-gel method to prepare said anti-Ferroelectric membrane ((Pb, La or Nb) (Zr, Sn, Ti) O3, the solute of precursor comprises acetate lead, the acetate lanthanum or ethanol nb, acetate tin, zirconium iso-propoxide and titanium iso-propoxide; the solvent comprises acetic acid, glycol ethylene ether and water; the final concentration of precursor is controlled between 0.2-0.4 M. the bed piece is LaNiO3/Pt/Ti/SiO2/Si and Pt/Ti/SiO2/Si. The product is mainly used for infrared heat-releasing electrical detector, smart device and system.

The invention relates to a preparation method of a multi-phase heterogeneous visible light catalysis functional fabric. The preparation method comprises the following steps of: (1) washing a fabric; (2) dropwise adding titanium tetraisopropoxide to deionized water, and heating the solution to 60-80 DEG C to react for 1-2 hours to obtain a solution A; (3) adding bismuth nitrate into a nitric acid solution and dropwise adding a wetting agent and a metal chelator to the solution to obtain a solution B; (4) adding metavanadate to the deionized water, heating the solution to 50-60 DEG C, and stirring the solution to obtain a solution C; (5) adding the solution B and the solution C to the solution A in sequence for reacting for 2-3 hours, and adjusting the pH of the solution mixture to alkalinity to obtain a heterogeneous photocatalyst finishing solution D; and (6) dipping the washed fabric to the finishing solution D, heating the finishing solution to 70-90 DEG C for reacting for 6-8 hours, and drying the fabric to obtain the multi-phase heterogeneous visible light catalysis functional fabric. The preparation method is simple and free of secondary pollution; and the functional fabric can be used for effectively purifying dyeing wastewater and air pollution under visible light irradiation.

An ordered mesoporous polyoxometallate-titanium dioxide composite and a preparation method belong to the chemical industry field. The composite comprises the following formula: H3PW12O40/TiO2. The preparation method combines such technologies as sol-gel chemistry, template self-assembly and programmed temperature hydrothermal treatment, etc. The method takes H3PW12O40 as an inorganic former body, a mixture of purity titanium tetraisopropoxide (TTIP) and titanium tetrachloride (TiCl4) as a titanium source and a nonionic surfactant (Pluronic P123) with structure of HO (CH2CH2O)20(CH2CH(CH3)O)70(CH2CH2O)20H) as a structure-guiding agent. The improvement effect of the catalytic property of the composite is very obvious and the life of the catalyst is prolonged.

The invention discloses a hydrothermal synthesis method of a micro-emulsion of nano lithium titanate. According to the method disclosed by the invention, the micro-emulsion is prepared from cetyltrimethylammonium bromide, n-hexanol, cyclohexane and a water phase, and tetrabutyl titanate and lithium hydroxide are used as reaction materials. The method comprises the steps of: (1) preparing the 0.02-2.0 mol/L lithium hydroxide micro-emulsion and 0.025-2.5 mol/L titanium tetraisopropoxide micro-emulsion respectively; and (2) mixing the micro-emulsions in two concentrates, stirring for 5-120 minutes at the room temperature, then transferring a mixture into a 50 ml high-pressure reactor which is lined with polytetrafluoroethylene, carrying out hydrothermal reaction at the temperature of 60-240 DEG C for 1-70 hours, and then carrying out centrifugal separation, washing, drying and thermal treatment on a reactant to obtain spinel type lithium titanate. The method has the characteristics of controllable grain size, controllable morphology, simple process, simple equipment and the like.

The invention discloses a preparation and application method of a titanium dioxide loaded highly dispersed platinum composite photocatalytic material, and belongs to the field of titanium dioxide photocatalysis. The preparation method comprises following steps: tetrabutyl titanate and hydrofluoric acid are stirred to be uniform at room temperature, an obtained mixture is reacted for 15 to 24h at 150 to 220 DEG C in a hydrothermal reaction kettle, and titanium dioxide nanosheets are obtained via separation, washing, and drying; the titanium dioxide nanosheets are dispersed in absolute ethanediol uniformly, and is subjected to reflux condensation stirring for 10 to 60min at 80 to 150 DEG C, polyvinylpyrrolidone and chloroplatinic acid are added, an obtained mixed material is subjected to reflux condensation stirring for 3 to 10h at 80 to 150 DEG C, and the titanium dioxide nanosheet loaded platinum nanoparticle composite material is obtained via separation, washing, and drying. The preparation method is capable of obtaining titanium dioxide nanosheets with a morphology easy to control; ethanediol is taken as a reducing agent, and 2 to 3nm platinum quantum dots with uniform particle size and high dispersity are obtained; the preparation parameters are easy to control; and repeatability is high. The titanium dioxide loaded highly dispersed platinum composite photocatalytic material is especially suitable to be used for catalytic degradation organic dyes under ultraviolet irradiation, and relatively high degradation rate is achieved.

The invention relates to a preparation method of an upconversion material of a core shell structure. The method comprises that NaYF4:Yb3+, Er3+ is dispersed into isopropanol, deionized water and ammonia water are added, and stirring is carried out to obtain a first mixed solution; ethyl orthosilicate is added into isopropanol, the isopropanol added with the ethyl orthosilicate is added into the first mixed solution slowly drop by drop, stirring, washing and centrifugal collection are carried out to obtain NaYF4:Yb3+, Er3+@SiO2; and the obtained NaYF4:Yb3+, Er3+@SiO2 deposition is re-dispersed into an isopropanol and DETA mixed solution, mixing is carried out to obtain a second mixed solution, titanium isopropoxide is added into isopropanol, and the isopropanol added with the titanium isopropoxide is added into the second mixed solution slowly drop by drop, stirring is carried out, the obtained solution is added into a hydro-thermal reactor for hydro-thermal processing, washing is carried out via deionized water and ethanol after cooling, the drying is carried out to obtain the upconversion material NaYF4:Yb3+, Er3+@SiO2@TiO2 of the core shell structure. The upconversion material of the core shell structure can serve as material of an upconversion layer of the perovskite solar cell, the perovskite solar cell can absorb infrared light more effectively via the upconversion material, and the efficiency of the cell is effectively improved.

The invention belongs to the technical field of solar cells, and in particular relates to a titanium dioxide (TiO2) nano-rod single-crystal array thin film as well as a preparation method and an application thereof. A hydrochloric acid solution of titanium tetraisopropoxide is taken as a titanium source, acetic acid is utilized for controlling the acidity so as to further control the hydrolysis rate of TiO2, and a hydrothermal method is adopted for preparing the TiO2 nano-rod array thin film on a fluorine-doped tin oxide (FTO) conductive glass substrate. The one-dimensional nano-rod structure of the TiO2 can provide a direct transmission path for electrons and can be used for improving the transmission property of the electrons; after the acidity is reduced through dilution with the acetic acid, the titanium dioxide nano-rod single-crystal array thin film with larger specific surface area can be obtained; and the array thin film is utilized for packaging a dye-sensitized solar cell and performing performance testing, and then the short circuit current and photoelectric conversion efficiency of the cell can be greatly improved.

The invention discloses an antiferroelectric film with adjustable working temperature zone and higher pyroelectric coefficient and a preparation method and application thereof. The antiferroelectric film (Pb,Nb)(Zr,Sn,Ti)O3 taken as the pyroelectric material is prepared by a sol gel method, the solute of precursor solution can be lead acetate, lanthanum acetate or niobium ethoxide, stannic acetate, zirconium isopropoxide and titanium isopropoxide, the solvent includes glacial acetic acid, ethylene glycol ethyl ether, acetylacetone and water, the final concentration of the precursor solution is controlled between 0.2-0.4 M, and the substrate comprises LaNiO3/Pt/Ti/SiO2/Si and Pt/Ti/SiO2/Si. The antiferroelectric film is high in thermally stimulated current and adjustable in temperature andcan be used for a pyroelectric infrared detector, a smart device and a system.

The invention discloses a CoS graded nano-bubble composite S positive electrode material of a lithium sulfur battery, and belongs to the technical field of the lithium sulfur battery. The preparationmethod of the CoS graded nano-bubble composite S positive electrode material comprises the steps of firstly, synthesizing TiO2 composite hexadecylamine nanoparticle by hydrolysis of titanium isopropoxide; secondly, coating a surface of the TiO2 composite hexadecylamine nanoparticle with a layer of MOF-loying PVP so that the TiO2 composite nanoparticle can be absorbed during the growth process of ZIF67 and a surface is embedded and an interior are buried onto ZIF-67 to form a Chinese data structure; and finally, performing vulcanization to obtain a CoS graded nano-bubble material with a plurality of CoS hollow spheres sleeving a CoS hollow polyhedron by hydrothermal method of thioacetamide, and injecting S into the CoS graded nano bubbles by a melting method to obtain a final material. TheCoS graded nano-bubble composite S provided by the invention is used as a lithium sulfur battery positive electrode, relatively high charge-discharge performance and stable cycle property are shown, and the important application value in the field of the lithium sulfur battery is achieved.

The invention discloses a production method of carbon nanofiber/zinc titanate composite for personal protection, and the composite obtained by the production method. The production method is characterized by including the steps of: adding titanium isopropoxide and zinc acetate into ethanol solvent, and adding polyvinylpyrrolidone to obtain spinning dope A; adding polyacrylonitrile into N, N-dimethyl formamide solvent to obtain spinning dope B; subjecting the spinning dope A and the spinning dope B to electrostatic spinning to obtain composite fibrous membranes; and allowing the drawn composite fibrous membranes to stand in air to be pre-oxidized, and carbonizing the membranes under nitrogen protection. The carbon nanofiber/zinc titanate composite has the advantages of light weight, high rate of biochemical disintegration, and fine mechanical properties.

The invention discloses a mildew-resistant paint which comprises the following components in parts by weight: 10-16 parts of titanium tetraisopropoxide, 80-120 parts of isopropanol, 8-16 parts of tetrapropoxyzirconium, 6-12 parts of polyvinyl chloride, 10-30 parts of dibutyl phthalate and 10-30 parts of ethylenediamine methyl propionate. The mildew-resistant paint is simple to prepare, and selects nontoxic production raw materials; and thus, the paint has the advantages of favorable use effect and environment friendliness. When being applied to a metal surface, the mildew-resistant paint can prevent the metal surface from mildewing, and can enhance the storage stability of metals.

The invention discloses a filtering membrane prepared with a 3d printing technology and a preparation method of the filtering membrane. The filtering membrane is prepared from raw materials as follows: montmorillonite, hydrotalcite, sodium silicate, activated carbon, zeolite, kaolin, carbon fibers, titanium isopropoxide, methyl isobutyl ketone, glass fibers, graphene, an initiator, a catalyst, a tackifier, a flexibilizer, a flocculation agent and a stabilizer through steps including decontamination, drying, mixing, laser scanning forming, cooling and the like. The filtering membrane prepared with the 3d printing technology contains graphene, silicate and other mixed ingredients and has the characteristics of good high-temperature resistance, high-pressure resistance, corrosion resistance, seismic resistance and the like; the filtering membrane prepared with the 3d printing technology has high efficiency when adsorbing VOCs and other toxic gases, is prepared with a simple process and is low in preparation cost.

The invention discloses an ultraviolet resisting agent for an acrylic fabric, which is composed of the following components by weight parts: 138 parts of methacryloyl oxide propyl trimethoxy silane; 30 parts of benzophenone; 36 parts of titanium isopropoxide; 42 parts of methyl salicylate; 20 parts of carbamide; and 15 parts of fatty alcohol-polyoxyethylene ether. Products prepared by the ultraviolet resisting agent are produced with low cost via simple technology, and clothes or fabrics processed by the ultraviolet resisting agent has the advantages of having excellent and durable ultraviolet resisting effect without influencing original feel and appearance of the textile, and the like.

The invention discloses a preparation method of a hollow porous TiO2 nanocubic material. The method firstly mixes titanium isopropoxide and methanol, adds into a mixture of 2-aminoterephthalic acid and N,N-dimethylformamide for a reaction, obtains an amino-modified Ti-MIL-125 nanocube material, conducts stirring for the reaction after water, sodium hydroxide and absolute ethanol are added, obtainsa nano-precursor material, and finally conducts heat-treating to obtain the hollow porous TiO2 nanocubic material; the invention discloses application of the hollow porous TiO2 nanocubic material ina lithium ion battery. The method utilizes the characteristics that acidic ligands constituting the amino-modified Ti-MIL-125 nanometer material are not stable under the alkaline condition to conductself-etching, thereby ensuring the stability of the structure and performance; the hollow porous TiO2 nanocubic material is applied to the lithium ion battery to increase the specific capacity of thelithium ion battery.

The invention relates to a preparation method of a mixed-phase titanium dioxide visible-light-induced photocatalyst derived from MOF. The preparation method comprises the following steps: dissolving 2-aminoterephthalic acid and titanium isopropoxide in a mixed solvent of N,N-dimethylformamide (DMF) and absolute methanol, transferring the obtained mixture into a high-pressure kettle, and keeping the temperature at 150 DEG C for 48 hours to prepare NH2-MIL-125; calcining the prepared NH2-MIL-125 at a high temperature under the protection of nitrogen so as to obtain the visible-light-induced photocatalyst. The preparation method has the beneficial effects that the preparation method is simple, the preparation conditions are easy to control, and the feasibility is high. The prepared MOF-derived mixed-phase titanium dioxide visible-light-induced photocatalyst is relatively good in photocatalytic degradation efficiency under visible light, and has a certain application prospect.

The invention provides a hierarchical alpha-Fe2O3/TiO2 hollow sphere difunctional photocatalyst. The alpha-Fe2O3/TiO2 hollow sphere difunctional photocatalyst with a hierarchical structure is prepared by virtue of hydrothermal reaction from FeOOH as a substrate, and butyl titanate, titanium tetrachloride, titanyl sulfate or isopropyl titanate as a titanium source; next, the alpha-Fe2O3/TiO2 hollow sphere difunctional photocatalyst is dispersed in water containing heavy metal ions and adsorption and light-catalyzed reaction are performed under the irradiation of simulated sunlight. The invention also provides new application of the hierarchical alpha-Fe2O3/TiO2 hollow sphere difunctional photocatalyst in treating of heavy metal ion pollution in the water.

The invention discloses mildew-proof wear-resistant asphalt paint which is characterized by being prepared from the following raw materials in parts by weight: 17-23 parts of E-22 epoxy resins, 6-9 parts of benzyl transparent silicon resins, 8-11 parts of polyether acrylate, 4-7 parts of tetraethylenepentamine, 3-5 parts of tricresyl phosphate, 1-3 parts of nano bamboo fibers, 2-4 parts of zinc chromate, 37-43 parts of modified asphalt, 5-7 parts of modified waste resin sand, 1-2 parts of ammonium bromide, 2-4 parts of fungacetin, 3-4 parts of catechinic acid, 4-6 parts of epoxy linseed oil, 8-11 parts of amyl acetate, 6-9 parts of xylene, 5-7 parts of glycol, 1-2 parts of tri(dioctylphosphoryloxy) titanium isopropoxide and 2-4 parts of powdered aluminum. The mildew-proof wear-resistant asphalt paint is prepared by adding the epoxy resins on the basis of the modified asphalt, so that the characteristics of high corrosion resistance, weather fastness, waterproofness and thermal stability of the pain are ensured; the added tricresyl phosphate has the characteristics of favorable wear resistance, weather fastness, mildew resistance and radiation resistance; and the added modified waste resin sand has favorable fire resistance, antifouling property and anti-ageing property, so that the quality of the paint is improved and the waste is recycled to solve the problem of environment pollution.

The invention provides a method of preparing iron oxide yellow by using a titanium dioxide by-product ferrous sulphate, belonging to a field of chemistry. The method comprises refining of ferrous sulphate, neutralization reaction, seed preparation, and oxidation synthesis; and the method controls a pH value of a solution during refining of the ferrous sulphate, and thus effectively removes impurities such as manganese, magnesium and zinc. In addition, by separating a seed preparation process into a neutralization reaction process and a seed preparation process, a preparation process of Fe(OH)2 suspension and an oxidation process are separated, thereby effectively controlling the seed to be spindle-shaped or needle-shaped, and improving dispersibility of the seed. The method is good in impurity removal effects, and can effectively control the seed to be spindle-shaped or needle-shaped and improve dispersibility of the seed; and the prepared iron oxide yellow has advantages of good color and high tinting strength.

The invention discloses a method for preparing a silver nanowire-titanium dioxide composite transparent electrode and a transparent electrode. The method comprises the steps of: taking silver nanowire-ethyl alcohol suspension, adding titanium tetraisopropoxide and ethanolamine into the suspension, shaking until silver nanowires are uniformly dispersed in the suspension, and forming silver nanowire-titanium dioxide sol gel; uniformly spin-coating the sol gel on a transparent substrate to form a silver nanowire-titanium dioxide sol gel thin film; and heating the transparent substrate spin-coated with the gel thin film, and until solution on the surface of the transparent substrate is volatilized and titanium dioxide sol gel is decomposed into titanium dioxide, cooling to the room temperature so as to form a random silver nanowire network completely coated with the titanium dioxide thin film. The transparent electrode not only has excellent electrical conductivity, transmittance and mechanical property, but also has excellent thermal and chemical stability due to coating of titanium dioxide; the method is unrelated to the substrate area, the substrate surface appearance and substrate flexibility, and is simple in process, high in repeatability and reliability and suitable for large-area batch production.

The invention relates to a method and application of in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite. The method includes the steps of dispersing and dissolving polyvinylpyrrolidone, adding graphene oxide, cetyl sodium sulfate and titanium isopropoxide respectively, centrifuging, washing, annealing and carbonizing to obtain the nanocomposite. In the composite electrode material, the TiO2 mesomorphase is anatase TiO2, micro nanocrystallines are uniformly dispersed and embedded in the graphene, and then the graphene is uniformly coated with a layer of amorphous carbon, and the mixro nanocrystallines are in alignment along the direction of (101). The in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite has a very large surface area up to 280-290m<2>g<-1>. The nanocomposite has great electrical conductivity and good tenacity, is easy to operate, low in cost, high in purity, excellence in property and capable of large-scale synthesis, which can be popularized and applied to other fields of energies and catalysis.

The invention discloses a preparation method for dexlansoprazole, belonging to the field of organic synthesis. The method comprises the following steps: (1) carrying out reaction on 2-hydroxymethyl-3-methyl-4-(2,2,2-trifluoro ethyoxyl) pyridine and thionyl chloride, and compounding 2-chloromethyl-3-methyl-4-(2,2,2-trifluoro ethyoxyl) pyridine; (2) putting 2-chloromethyl-3-methyl-4-(2,2,2-trifluoro ethyoxyl) pyridine acquired in the step (1) and 2-sulfydryl-1H-benzimidazole into an aqueous liquid, and then adding a phase transfer catalyst and sodium hydroxide, thereby acquiring 2-[[3-methyl-4-(2,2,2-trifluoro ethyoxyl) pyridine-2-group] methylmercapto]-1H-benzimidazole; (3) taking L-ethyl tartrate as a chiral assistant agent, titanium isopropoxide and diisopropylethylamine as a catalyst and cumyl hydroperoxide as an oxidizing agent and reacting with 2-[[3-methyl-4-(2,2,2-trifluoro ethyoxyl) pyridine-2-group] methylmercapto]-1H-benzimidazole acquired in the step (2) at low temperature, thereby acquiring dexlansoprazole. The preparation method for dexlansoprazole disclosed by the invention is simple and efficient, is capable of obviously shortening the reaction time under the condition of guaranteeing the product yield and is capable of improving the product quality.

The invention provides a fluoride-free preparation method of titanium dioxide of a similar graphene structure and belongs to the technical field of nanomaterial preparation. The material is composed of titanium dioxide nanosheets having the size of greater than 500nm. The preparation method mainly comprises the following steps: by taking ethylene glycol and ethanol as reaction solvents, inhibiting quick decomposition of titanium isopropylate by use of concentrated hydrochloric acid under the action Pluronic P123, performing a solvothermal reaction, growing micro flake titanium dioxide by virtue of self-assembly, and further growing to obtain titanium dioxide having a large area and an ultra-thin similar graphene structure. According to the preparation method, titanium dioxide having the large area and the ultra-thin similar graphene structure is synthesized for the first time and can be widely applied to photo/electro/chemocatalysis, the electrode materials of new energy batteries and the like.

The invention provides a preparation method of a perovskite type solar cell modified by an organic/inorganic hybrid hole transport layer. The preparation method comprises the steps of solving methylammonium iodide and lead chloride into dimethylformamide, thereby preparing perovskite precursor; dissolving titanium isopropylate into isopropanol for obtaining a solution, adding hydrochloric acid solution into isopropanol for obtaining another solution, mixing the two solutions for obtaining titanium dioxide precursor, then applying the titanium dioxide precursor on a substrate, then performing annealing for obtaining a cured electron transport layer; applying the perovskite precursor on the electron transport layer, and then performing annealing for obtaining a cured photosensitive layer; dissolving copper salt into 2,2',7,7'-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene solution, thereby obtaining an organic/inorganic hybrid hole transport layer; and machining metal electrodes on the hole transport layer, thereby obtaining the perovskite type solar cell modified by the organic/inorganic hybrid hole transport layer. The perovskite type solar cell prepared according to the preparation method has high energy conversion efficiency and high photovoltaic characteristic.