13 results about "Titanium isopropoxide" patented technology

The invention belongs to the field of ceramic materials, and particularly relates to a lead-free ferroelectric ceramic material and a preparation method thereof.The preparation method comprises the steps that aluminum nitrate nonahydrate and titanium isopropylate are dissolved in ethylene glycol and stirred, a citric acid solution is added, stirring continues, and a precursor solution A is prepared; dissolving bismuth nitrate pentahydrate in a citric acid solution, and stirring to prepare a precursor solution B; mixing the precursor solution A and the precursor solution B, stirring and drying to form gel; drying, grinding and crushing the gel, and calcining to obtain ceramic powder; the preparation method comprises the following steps: uniformly mixing ceramic powder and nano barium titanate powder by taking deionized water as a medium, and drying to obtain precursor powder; grinding and granulating the precursor powder and a 5wt% polyvinyl alcohol solution in an agate mortar, and then applying axial pressure to form a green body; and putting the green body into a corundum crucible with a cover, and sintering by using a two-step method to finally obtain the lead-free ferroelectric ceramic material. According to the invention, a universal combined optimization strategy is provided, and a strong relaxation ferroelectric system is developed.

The invention relates to the field of solid electrolyte, in particular to a doped lithium aluminum titanium phosphate solid electrolyte membrane as well as a preparation method and application of the doped lithium aluminum titanium phosphate solid electrolyte membrane. And carrying out spin coating, drying and segmented calcination treatment on the obtained gel to obtain the doped titanium-aluminum-lithium phosphate solid electrolyte membrane. According to the preparation method disclosed by the invention, liquid raw materials including lithium isopropoxide, titanium isopropoxide, isopropanolamine phosphate, aluminum isopropoxide and an isopropanol alkaline earth metal compound are uniformly mixed and reacted at a molecular level, so that the chemical stability of the prepared gel is ensured, and the phenomenon that the gel is cracked due to local stress concentration is avoided; and the film material is ensured to be uniform and compact at the micron level through spin coating and segmented calcination treatment of the gel.

A tantalum and nitrogen co-doped strontium titanate with perovskite structure, is a photocatalytic material. Titanium isopropoxide and tantalum pentachloride are dissolved in methanol, then ethylene glycol, citric acid and strontium carbonate are added, a polymerization reaction product is calcined with air to remove organic carbon, and tantalum doped strontium titanate is obtained. The tantalum doped strontium titanate is mixed with magnesium powder and nitrided in an atmosphere of an ammonia gas flow. A nitrided product is acid-pickled, water-washed and dried, and the tantalum and nitrogen co-doped strontium titanate with perovskite structure is obtained. A titanium-oxygen bond is weakened by pre-doping tantalum, and a magnesium powder-assisted nitridation method is used, such that spatial distribution of a high-content nitrogen dopant in strontium titanate is realized.

The invention discloses a methane catalytic combustion catalyst and a preparation method and application thereof in the technical field of environmental catalysis and energy chemical industry. The catalyst comprises a Pd active component, a gamma-Al2O3 carrier, a copper-titanium-oxygen cluster compound and an iron-niobium-oxygen polyhedron. The copper-titanium-oxygen cluster compound is prepared by mixing copper sulfate pentahydrate, titanium tetraisopropylate and the like for hydrothermal reaction, and the iron-niobium-oxygen polyhedron is obtained by reduction treatment after solvothermal reaction of ferric nitrate nonahydrate, niobium pentoxide and the like. When the catalyst is prepared, after the gamma-Al2O3 carrier is pretreated, the gamma-Al2O3 carrier, Pd salt and two modified compounds are subjected to ultrasonic dispersion, impregnation, drying and calcination. According to the catalyst, oxygen vacancy and lattice oxygen migration are synergistically regulated through two brand new modified compounds, and the methane catalytic combustion activity is remarkably improved. The method is suitable for purification treatment of coal mine gas, natural gas leakage tail gas and other scenes, can effectively reduce carbon emission, and has important environmental protection and energy utilization values.

The application discloses a preparation method of nanoscale Ti-Co-beta molecular sieve, which comprises the following steps: taking tetraethyl orthosilicate or silica sol as a silicon source, titanium tetrachloride or titanium isopropoxide as a titanium source, cobalt chloride hexahydrate as a cobalt source, sodium hydroxide as an alkali source, tetraethylammonium hydroxide as a template agent, and sodium acetate or sodium benzoate as a mineralizer; after one-step hydrothermal treatment, drying and calcination, Na type Ti-Co-beta molecular sieve is obtained; and after ion exchange treatment, sodium ions are removed, and nanoscale Ti-Co-beta molecular sieve is obtained. The method has the advantages of no need of adding fluoride, simple operation, good repeatability, low cost, easy industrialization, and the like, and the prepared Ti-Co-beta molecular sieve has the advantages of nanoscale, good crystallinity, uniform distribution of Ti and Co in the zeolite framework of the beta molecular sieve, large specific surface area and rich metal active sites, and the like, and is suitable for a toluene hydroxylation reaction and has very good catalytic activity, high toluene conversion rate and phenol selectivity.

The application discloses an antibacterial and breathable 3D warp-knitted fabric production process, which comprises preparation of modified polyester filaments, preparation of the warp-knitted fabric and post-treatment of the warp-knitted fabric; the preparation method of the modified polyester filaments is as follows: preparation of modified master batches and preparation of the modified polyester filaments, wherein the modified master batches comprise tea carbon, silver-loaded zirconium phosphate, graphene oxide, ethylene-acrylic acid ester copolymer, titanium isopropoxide and pentaerythritol bisphosphoric acid bisdimethylamino ethanol ester; the preparation of the warp-knitted fabric is that the modified polyester filaments are prepared into the antibacterial and breathable warp-knitted fabric with thick-weaving areas, thin-weaving areas and mesh-weaving areas by adopting loop-forming type jacquard three-needle patterning. The tea carbon added in the modified polyester makes the prepared modified polyester filaments have the functions of releasing negative ions and adsorbing peculiar smell. The silver-loaded zirconium phosphate added in the modified polyester improves the antibacterial effect of the modified polyester filaments. The warp-knitted fabric prepared by adopting the loop-forming type jacquard three-needle patterning has the mesh-weaving areas and has the air-permeable effect.

The present invention relates to a method for obtaining hybrid perovskite-based films, comprising the steps of: (a) removing a fraction of said FTO layer from a glass plate or substrate coated with a transparent conductive layer of fluorine-doped tin oxide (FTO) using hydrochloric acid and zinc powder, forming a first absorbent layer; (b) washing the substrate obtained in step a) with soap, then washing with acetone to remove the soap, and immediately washing with isopropanol; (c) depositing a titanium isopropoxide solution onto the substrate washed in step b) to form a second layer; (d) depositing a titanium nanoparticle solution onto the substrate obtained in step c) above to form a third layer; (e) preparing a hybrid perovskite precursor solution (MAPbI3);(f) depositing a quantity of the hybrid perovskite precursor solution onto the substrate obtained in step d), after a certain time, a quantity of an antisolvent is deposited onto the substrate, forming a fourth layer or film of hybrid perovskite; (g) placing a Spiro-OMeTAD solution onto the substrate from step f) above to form a fifth layer or film; and, (h) depositing a metallic contact by vacuum evaporation onto the substrate from step g) above, forming a sixth layer.

The invention discloses an isomorphic rare earth titanium oxide cluster material as well as a preparation method and application thereof. The general formula of the material is [Re2Ti4O4 (MAA) 14 (EtO) 2], and Re is a rare earth element including one of terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm) and ytterbium (Yb). The preparation method comprises the following steps: mixing corresponding rare earth metal acetate, titanium isopropylate, methacrylic acid and ethanol according to a ratio, carrying out ultrasonic dissolution, and carrying out standing reaction at 60 DEG C for 2 days to obtain a target product. The material has a single and definite molecular structure and a size less than 2 nanometers, can be dissolved in solvents such as propylene glycol methyl ether acetate, can form a film through spin coating, can be exposed by using electron beams or extreme ultraviolet light, and can form a clear pattern after development. The material has high extreme ultraviolet absorption cross sections of rare earth and titanium elements, the synthesis process is simple, the yield is high, a formed film layer is low in roughness, excellent resolution capability is shown in the scale range of 30-100 nm, and the material is suitable for high-performance photoresist in advanced semiconductor manufacturing.

The application relates to a PEN resin and a synthesis method thereof, which comprises the following steps: S1, preparing 2,6-naphthalene dicarboxylic acid and ethylene glycol into a slurry, ultrasonic dispersion, and adding into a microchannel reactor; S2, adding a titanium-tantalum composite catalyst into the microchannel reactor, reacting under the protection of inert gas, and obtaining an esterification reactant; S3, collecting the esterification reactant obtained in the step S2 into a polycondensation kettle, heating, reducing pressure, and reacting to obtain a polymer melt; and S4, cooling the polymer melt obtained in the step S3, granulating, and obtaining the PEN resin; the preparation raw materials of the titanium-tantalum composite catalyst in the step S2 include tetrabutyl titanate, titanium isopropoxide and tantalum isopropoxide. The PEN resin synthesized by the method has a characteristic viscosity of 0.5-0.9 dL / g, a molecular weight distribution of 1.15-1.25, a glass transition temperature of 122-126 DEG C and a melting point of greater than or equal to 268 DEG C.

The application discloses a kind of silver monatomic antibacterial antiviral materials and its preparation method and application, belong to timber processing technical field.The preparation method of the above-mentioned silver monatomic antibacterial antiviral material includes: first, ZIF-8 is prepared, then by ammonium ceric nitrate is dissolved in isopropyl alcohol, titanium isopropoxide is added, precursor solution is obtained;ZIF-8 is added to precursor solution, and TiO2@ZIF-8 is prepared;Silver ammonia solution is configured, and silver ammonia solution is added to TiO2@ZIF-8 dispersion, and silver monatomic antibacterial antiviral material (Ag SACs) is prepared.The monatomic silver introduced in the application has good dispersity and chemical stability, can realize efficient antibacterial antiviral performance while avoiding the problem of activity decline caused by traditional nano-silver due to agglomeration, reduce the environmental burden brought by silver agent release, realize long-acting antibiosis.

The invention discloses a preparation method of alumina powder for polishing, and relates to the field of alumina, and the preparation method comprises the following steps: S1, heating and dissolving aluminum hydroxide in a sodium hydroxide solution to prepare a sodium aluminate solution; s2, mixing the sodium aluminate solution with the isopropanol combined solution, and then performing suction filtration, washing and drying to obtain aluminum isopropoxide; s3, grinding aluminum isopropoxide, heating the aluminum isopropoxide and acetic acid, performing ultrasonic treatment, performing suction filtration, cleaning, extruding into balls, drying, and roasting to obtain aluminum oxide microspheres; s4, soaking alumina microspheres in a silicon solution, drying, roasting, and grinding into powder; wherein the isopropanol combined liquid comprises isopropanol, titanium dioxide and lanthanum oxide. The method has an xx effect.

Disclosed are a catalyst for synergistic removal of nitrogen oxides (NOx) and CO as well as a preparation method and use thereof. The preparation method comprises: performing vibratory ball milling, washing, drying and calcining on aluminum isopropoxide and / or titanium isopropoxide, chlorides of five or more different metal elements and P123 and / or polyethylene glycol (PEG), stirring the obtained high-entropy oxide inner core and a gel of H3PO4 and Ce(NO3)3, and then performing vibratory ball milling, washing, drying and calcining to obtain an high-entropy oxide loaded with CePO4 seeds; and preparing, by using ammonia water, a clear solution containing pyrophosphate and Ce(NO3)3 in equal stoichiometric ratios, then adding the high-entropy oxide loaded with the CePO4 seeds and urea and / or tetrapropylammonium hydroxide (TPAH) to form a slurry, and, after hydrothermal reaction, washing, drying and calcining a solid to obtain the catalyst.

The application discloses a kind of nano visible light catalytic refrigerant and the preparation method of visible light catalytic concrete, first titanium isopropanol is dissolved in anhydrous ethanol, then is added dropwise to the aqueous acetic acid solution dispersed with nanocellulose fiber, after dropwise addition is completed, it is stirred uniformly at room temperature;After the temperature range is raised, reaction is completed, and after standing for a period of time, obtain nano visible light catalytic refrigerant;Gelled material;Water;Nano visible light catalytic refrigerant are configured slurry together, using unidirectional freezing technology and low-temperature slow melting technology are combined, obtain visible light catalytic concrete with radiation refrigeration performance.The application effectively improves the visible light catalytic degradation air pollutant effect of low-dosage photocatalyst modified concrete, and can improve the daytime radiation refrigeration performance of concrete slab.