13 results about "Titanium tetraisopropoxide" patented technology

The application discloses a preparation method and application of a rare earth cluster scintillator, and the scintillator material is prepared from 4,7-diphenyl-1,10-phenanthroline, 4-tert-butyl benzoic acid, titanium tetraisopropoxide and europium(III) acetate by a solvothermal reaction. The rare earth cluster scintillator material Eu2Ti4 prepared in the application has excellent flexibility and can be used for flexible imaging of non-planar materials. The minimum detection limit of the obtained scintillator is 32.89 nGy s ‑1 , which is 167 times lower than a standard medical diagnostic dose. The rare earth cluster scintillator process is simple, has high yield and fast crystal growth. The limit resolution of the Eu2Ti4-PDMS scintillation screen in the application exceeds 31 LP mm ‑1 at different temperatures, and the scintillation screen has excellent high-resolution X-ray radiation imaging capability and can be used as an ideal visualization tool for high-performance radiation imaging in extreme environments.

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 relates to the technical field of pigment and filler preparation, and discloses conductive titanium dioxide as well as a preparation method and application thereof. The preparation method of the conductive titanium dioxide comprises the following steps: step 1, taking tantalum ethoxide, titanium tetraisopropoxide, isopropanol and a glycollic acid aqueous solution as raw materials, and reacting to prepare doped modified titanium dioxide; 2, coating the doped modified titanium dioxide with an organic monomer to obtain organic modified titanium dioxide; and step 3, coating the organic modified titanium dioxide with a metal oxide to obtain the conductive titanium dioxide. The conductive titanium dioxide disclosed by the invention not only has excellent conductivity and weather resistance, but also has the advantages of small particle size and easiness in dispersion, has very good formula applicability, and can be used in conductive coatings.

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 relates to the technical field of pigment and filler preparation, and discloses conductive titanium white powder as well as a preparation method and application thereof. The preparation method of the conductive titanium white powder comprises the following steps: step one, using ethanol tantalum, titanium tetraisopropoxide, isopropyl alcohol and ethylene glycol aqueous solution as raw materials, reacting to prepare doped modified titanium dioxide; step two, coating the doped modified titanium dioxide with an organic monomer to obtain organic modified titanium dioxide; and step three, coating the organic modified titanium dioxide with a metal oxide to obtain the conductive titanium white powder. The conductive titanium white powder has excellent conductivity and weather resistance, small particle size, easy dispersibility and good formula applicability, and can be used in conductive coatings.

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 a synthesis process of dapagliflozin. The method comprises the following steps: (1) preparing a Grignard reagent THF solution of 1-chloro-2-(4-ethoxybenzyl)-4 iodobenzene; (2) preparing 2, 3, 4, 6-tetra-O-acetyl-alpha-D-glucopyranosyl bromide; (3) in the presence of a catalyst containing anhydrous cerium chloride and titanium tetraisopropoxide, carrying out coupled reaction on the Grignard reagent THF solution obtained in the step (1) and the 2, 3, 4, 6-tetra-O-acetyl-alpha-D-glucopyranose bromide obtained in the step (2) at the temperature of-15 to-10 DEG C to obtain an acetylated dapagliflozin intermediate; and (4) carrying out deprotection reaction on the acetylated dapagliflozin intermediate obtained in the step (3) to obtain the dapagliflozin. Under a composite catalytic system, the reaction shows excellent stereoselectivity, the required beta-configuration C-glycoside product is specifically generated, and the generation of by-products such as alpha-isomers and the like is effectively inhibited.

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.

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.