31 results about "Titanium isopropoxide" patented technology

The invention is suitable for the technical field of chemical industry, and provides a method for preparing polycarbonate diol by using a titanate catalyst, which comprises the following steps: step 1, transesterification: mixing dimethyl carbonate and 1, 6-hexanediol according to a molar ratio of 1.1-1.5: 1, adding isopropyl titanate which accounts for 0.01-2% of the total raw material amount as a catalyst, and reacting at the temperature of 50-60 DEG C for 1-3 hours; carrying out transesterification on the mixture; step 2, carrying out condensation polymerization to obtain a polycarbonate diol crude product; and step 3, carrying out reduced pressure purification, and removing the small molecular polymer and the residual titanium isopropoxide catalyst to obtain the high-purity polycarbonate diol. According to the present invention, the efficient titanium isopropoxide catalyst is used under the normal pressure, such that the preparation of the high-purity and narrow-molecular-weight-distribution polycarbonate diol is achieved, the operation condition is mild, the production efficiency is high, the cost is low, and the catalyst has characteristics of low boiling point, easy removal and environmental protection.

The invention relates to the technical field of coating preparation, and discloses a high-adhesion quick-drying inorganic zinc silicate shop primer and a preparation method thereof.The high-adhesion quick-drying inorganic zinc silicate shop primer is prepared from modified zinc powder, modified graphite powder, a sodium silicate solution, alpha-phase nanometer AlO, a quick-drying agent, an adhesion promoter, heat-resistant filler, a dispersing agent, a defoaming agent and a diluting solvent; the quick-drying agent is prepared by compounding zinc naphthenate, EDTA and titanium isopropylate according to the mass ratio of 1: (0.2-0.3): (0.4-0.6), the quick-drying agent accelerates the reaction by catalyzing hydrolysis of silicate through zinc salt, chelating of EDTA and metal ions, titanium isopropylate provides titanium ions to synergistically form a film and improve the quick-drying efficiency, the adhesion promoter is prepared by compounding KH-560 and E-44 epoxy resin according to the mass ratio of 3: 1, and the adhesion promoter is prepared by compounding epoxy resin and epoxy resin. The adhesion promoter enhances interface mechanical occlusion and adhesion through silane bonding base materials and epoxy resin, other raw materials are matched with the adhesion promoter to accelerate the drying speed of the primer, and a coating coated with the primer is not prone to stripping and peeling. The application has the effects of improving the adhesive force and drying speed of the inorganic zinc silicate shop primer.

The invention relates to the technical field of daily chemicals, in particular to modified titanium dioxide for cosmetics and a preparation method of the modified titanium dioxide. The modified titanium dioxide is prepared from the following raw materials: sodium stearoyl glutamate, titanium isopropoxide triisostearate, silica and titanium dioxide; the mass ratio of the sodium stearoyl glutamate to the titanium isopropoxide triisostearate to the silica to the titanium dioxide is (2-4): (0.2-1): (1-3): (93-97). Through synergistic modification of sodium acyl glutamate and titanium isopropoxide triisostearate, the surface of titanium dioxide has hydrophilicity and lipophilicity at the same time, and the titanium dioxide is endowed with excellent interface wettability. The modified titanium dioxide can show good dispersibility and stability in a wax-based makeup ointment system, a silicone oil system, a synthetic ester grease system and an oil-in-water (O / W) system, and is not limited by the polarity of an oil phase, the compatibility and adaptation range of a formula are remarkably improved, and the titanium dioxide treated by the method effectively resists the problem of darkness.

The invention relates to the technical field of chemistry, and discloses a preparation method of an efficient and stable rare earth titanium oxygen cluster luminescent material, and the chemical formula of the efficient and stable rare earth titanium oxygen cluster luminescent material is [C90H56O26N4F10Ln2Ti4], the preparation method comprises the following steps: weighing raw materials according to a chemical formula ratio, and adding the raw materials into an acetonitrile solution to form a mixed solution; adding titanium isopropoxide, sealing, treating in an ultrasonic machine until the materials are fully mixed, and then filtering; heating the filtered clarified solution to separate out blocky crystals, and taking out the blocky crystals after cooling; the preparation method provided by the invention has the advantages that the operation is simple, the energy consumption is low, and harsh synthesis environments such as high temperature and high pressure are not needed; the cluster material prepared by the method has a crystal structure, high-efficiency luminescence capability, strong repeatability and good stability.

The present invention discloses a titanium-based perovskite oxide heterojunction catalytic material and its preparation method and application, which belongs to the field of photocatalysts. The preparation method of the present invention comprises dissolving magnesium nitrate hexahydrate and urea in deionized water, then dispersing titanium isopropoxide in ethylene glycol solution, mixing the above two solutions; then continuously stirring the solution mixture under heating conditions until the solvent is completely evaporated; finally, calcining the obtained powder to remove impurity ions, and obtaining nanoparticles of Mg x Ti y O5; Mg x Ti y O5, InCl3·4H2O, thioacetamide and urea were dispersed in an ethanol aqueous solution. After continuous stirring, the solution was subjected to a hydrothermal reaction. After the solution was naturally cooled to room temperature, it was centrifuged, washed, and then dried to a constant weight to obtain a catalytic material Mg x Ti y O5 / In2S3. This photocatalytic system achieves effective pollutant degradation and has the characteristics of simple synthesis method, good stability and reusability.

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 present invention discloses a porous electrochromic material formed by the self-assembly of titanium dioxide nanocrystals modified with surface fluoride ions, as well as a preparation method and application thereof. The present invention does not require a template and directly synthesizes the porous electrochromic material formed by the self-assembly of titanium dioxide nanocrystals modified with surface fluoride ions on an FTO conductive glass substrate via a one-step solvothermal method using hydrofluoric acid as an auxiliary agent and ethanol as a solvent. The titanium source is a mixture of tetrabutyl titanate and titanium isopropoxide. The surface fluoride ion-modified porous titanium dioxide nanocrystal electrochromic material prepared by the present invention has abundant oxygen vacancies and excellent dual-band electrochromic properties, enabling independent and selective optical transmittance regulation for visible and near-infrared light. The preparation method of the present invention is simple and reproducible, supporting large-scale production.

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 invention discloses a three-dimensional TiO2-Ag / AgCl composite material and a preparation method and application thereof, belonging to the field of functional materials and Raman spectroscopy detection, and the preparation method comprises: (1) adding titanium isopropoxide to a mixture of ethylene glycol, concentrated hydrochloric acid and water, stirring, and then immersing Ag foil therein, and performing a hydrothermal reaction to prepare a substrate; (2) placing the substrate under a xenon light source, controlling the light source current to irradiate the substrate, so that part of the AgCl component in the substrate undergoes photoreduction to generate active single substance Ag; (3) placing the substrate after light treatment in a protective atmosphere, controlling the heating temperature at 200-500°C, so that the active single substance Ag undergoes thermal migration relying on TiO2 monomer, and preparing a three-dimensional TiO2-Ag / AgCl composite material. The composite material has good structural stability and adjustable structure, and the SERS activity is efficient and stable, and can be used for high-sensitivity detection of water pollutants such as antibiotics.

The invention discloses honeycomb paper capable of preventing tensile fracture and a preparation method thereof.The preparation method comprises the steps of papermaking, dipping, tensile adhesive preparation, paper sizing, paper rolling, honeycomb hole opening and the like, the preparation method is simple and reasonable, the prepared honeycomb paper is high in structural strength and tensile strength, the fracture condition is not prone to occurring, and the service life of the honeycomb paper is prolonged. And the product quality is greatly improved. Besides, sulfate softwood pulp and sulfate bamboo pulp are combined, neosinocalamus affinis bamboo powder is added, the mechanical strength of the honeycomb paper can be improved, and the tensile property of the honeycomb paper can be improved by dipping the raw paper into chitosan methacrylate dipping liquid; rosin modified alkyd resin, oxidized starch, polyoxyethylene, titanium isopropoxide triisostearate, carboxymethyl cellulose, an acrylic emulsion, a dry strength agent, a lubricant and modified polyvinyl alcohol are added into the tensile adhesive, so that the tensile strength of the honeycomb paper can be improved, and the surface pore structure of the honeycomb paper can be improved.

The invention discloses a preparation method of diethoxy organic group terminated polydimethylsiloxane, which comprises the following steps: (1) mixing alpha, omega-dihydroxy polydimethylsiloxane, an ethoxy siloxane cross-linking agent and a phosphate catalyst, and stirring for 30-150 minutes under the condition that the temperature is 35-75 DEG C and the humidity is isolated; (2) detecting that no thickening or gelling exists through titanium isopropoxide, and adding an inactivating agent; and (3) under the condition that the temperature is 35 to 75 DEG C, carrying out vacuum defoaming and mixing for 15 to 90 minutes, so as to obtain the diethoxy organic group terminated polydimethylsiloxane. According to the preparation method disclosed by the invention, the polydimethylsiloxane with thorough ethyoxyl end capping is obtained through the efficient catalytic action of the phosphate catalyst; the ethanol solution of sodium ethoxide is used as an inactivating agent, so that the side effect of the catalyst in rearrangement and degradation of high polymers can be greatly reduced, the storage time of the diethoxy organic group terminated polydimethylsiloxane is prolonged, and high-quality base rubber is provided for preparing non-toxic and ethanol-removed RTV-1 silicone rubber.

A preparation method of a carbon-coated nickel-nitrogen functionalized carbon-doped titanium nitride monolithic electrode. The pretreated carbon cloth is used to prepare a titanium dioxide seed layer substrate through a titanium tetrachloride chemical bath method and high-temperature calcination; titanium isopropoxide solution is added, and after high-temperature hydrothermal treatment and high-temperature calcination, titanium dioxide nanorods are obtained; using the titanium dioxide nanorod substrate as a working electrode, a polyaniline film is deposited on the surface through cyclic voltammetry electrodeposition; and a nickel hydroxide film is prepared through constant current electrodeposition; a mixed solution of resorcinol and hexamethylenetetramine is added, and after high-temperature hydrothermal reaction, it is calcined at high temperature in an ammonia atmosphere to obtain the carbon-coated nickel-nitrogen functionalized carbon-doped titanium nitride monolithic electrode. This electrode has the advantages of simple preparation process, excellent capacitance contribution, and high heavy metal ion removal efficiency, etc., and can be applied to the efficient removal of low-concentration heavy metal ions in industrial wastewater, providing a new way for realizing high-performance and low-cost TiN-based CDI heavy metal wastewater purification technology.

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 invention belongs to the technical field of photocatalytic materials. Provided are perovskite tantalum-nitrogen co-doped strontium titanate, and a preparation method therefor and the use thereof. Titanium isopropoxide and tantalum pentachloride are dissolved in methyl alcohol, ethylene glycol, citric acid and strontium carbonate are then added thereto, and after polymerization, organic carbon is removed by means of roasting with air, thereby obtaining tantalum-doped strontium titanate; same is then mixed with a magnesium powder, and the resulting mixture is nitrided in an ammonia gas flow atmosphere; and the resulting reaction product is subjected to acid pickling, water washing and drying, thereby obtaining perovskite tantalum-nitrogen co-doped strontium titanate. Titanium-oxygen bonds are weakened by means of pre-doping with tantalum, and the spatial distribution of a high-content nitrogen dopant in strontium titanate is then achieved by means of a magnesium-powder-assisted nitriding method; therefore, the synthesized catalyst has a wider light absorption range, and has significant photocatalytic activity in both hydrogen production by means of photocatalytic water splitting and oxygen production by means of water splitting.

The invention discloses a platinum-tin bimetallic functional catalyst, a preparation method and an application of the platinum-tin bimetallic functional catalyst in chlorine-containing volatile polluted organics, and the preparation method comprises the following steps: mixing an isopropanol solution of SnCl4. 5H2O or SnCl2. 2H2O with an isopropanol solution containing diethylenetriamine and titanium isopropylate, and then carrying out hydrothermal reaction and roasting to obtain a Sn-TiO2 oxide carrier; and adding the Pt solution into the water suspension of the Sn-TiO2 oxide carrier, drying by distillation, and then carrying out reduction reaction to obtain the platinum-tin bimetallic functional catalyst. According to the metal composite oxide, the Sn-TiO2 nanosphere carrier is prepared through in-situ synthesis, precious metal platinum is evenly distributed on the surface of the Sn-TiO2 nanosphere carrier, catalytic degradation of CVOCs can be effectively promoted, and the sulfur resistance of a catalyst can be effectively improved. According to the catalyst disclosed by the invention, the degradation efficiency of the chlorine-containing VOCs is remarkably improved, the treatment cost is reduced, and the negative influence on the environment is reduced.

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 invention provides a TiO2 photocatalyst and a preparation method thereof, and relates to the technical field of photocatalysis, the preparation method of the TiO2 photocatalyst comprises the following steps: uniformly mixing terephthalic acid, 2-aminoterephthalic acid, isopropyl titanate, an acid solution and a first organic solvent to obtain a first solution; carrying out hydrothermal reaction on the first solution, filtering, washing and drying to obtain an organic metal framework material; and calcining the organic metal framework material to obtain the TiO2 photocatalyst. The TiO2 photocatalyst prepared by the method disclosed by the invention is relatively high in electron-hole separation efficiency, relatively high in CO2 photocatalytic efficiency and relatively excellent in CH4 selectivity. Besides, terephthalic acid is prepared from waste PET plastic as a raw material and is applied to preparation of the organic metal frame material, so that the influence of PET plastic waste on the environment can be effectively reduced, and the production cost of the TiO2 photocatalyst can be reduced.

The invention belongs to the technical field of ionic gel composite material preparation, and particularly relates to a preparation method of mesoporous titanium dioxide ionic gel microspheres, which comprises the following steps: adding cetylamine and a KCl aqueous solution into absolute ethyl alcohol, stirring and dissolving, adding titanium isopropylate to form sol to obtain a TiO2 precursor microsphere suspension, and drying to obtain the mesoporous titanium dioxide ionic gel microspheres. Washing with ethanol, centrifuging and drying to obtain powder; and mixing mesoporous TiO2 obtained by calcining the powder at a high temperature with methyl methacrylate, an ionic liquid, an initiator and N, N-dimethylformamide, heating in an oil bath, fully reacting, drying in vacuum, washing and drying again to obtain the mesoporous titanium dioxide ionic gel microspheres. Titanium isopropylate is used as a titanium source to prepare mesoporous TiO2, ionic gel is packaged in the mesoporous TiO2 through a vacuum solvent removal method, and the catalytic capacity in application is remarkably improved due to the existence of ionic liquid. The preparation method is simple in process, short in preparation period and low in equipment cost, and can be used for production.

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 application discloses a platinum-tin bimetallic functional catalyst and a preparation method and application thereof in chlorinated volatile organic compounds, and the preparation method comprises the following steps: mixing an isopropyl alcohol solution of SnCl4.5H2O or SnCl2.2H2O with an isopropyl alcohol solution containing diethylenetriamine and titanium isopropyl alcohol, then performing hydrothermal reaction, and calcining to obtain a Sn-TiO2 oxide carrier; adding a Pt solution into a water suspension of the Sn-TiO2 oxide carrier, performing reduction reaction after steam drying, and obtaining the platinum-tin bimetallic functional catalyst. The metal composite oxide is prepared by in-situ synthesis of the Sn-TiO2 nanosphere carrier, and the noble metal platinum is uniformly distributed on the surface, which can effectively promote the catalytic degradation of CVOCs, and effectively improve the sulfur resistance of the catalyst. The catalyst of the application can significantly improve the degradation efficiency of the chlorinated VOCs, reduce the treatment cost, and reduce the negative impact on the environment.

The invention discloses a zinc-titanium composite cluster and a synthesis method and photoetching patterning application thereof, and the zinc-titanium composite cluster with a general formula I structure has the characteristics of high thermal stability, small particle size, uniform distribution, high sensitivity and high resolution. The synthesis method comprises the following steps: dissolving R1 substituent modified benzoic acid in an anhydrous organic solvent, adding a mixture of titanium isopropylate and zinc acetate, standing to generate a crystal precipitate, washing, carrying out suction filtration, and carrying out vacuum drying to obtain a pure solid product. The zinc-titanium composite cluster is used as a photosensitizer and resin in extreme ultraviolet lithography and electron beam lithography, has excellent high sensitivity and high resolution, is suitable for the fields of semiconductor manufacturing, nanotechnology, optical element manufacturing and the like, also has excellent thermal stability and chemical stability, and can be applied to the field of optical element manufacturing. And the application of the material in various extreme environments becomes possible.

The application discloses a high-dispersion natural gas hydrodesulfurization catalyst carrier, a catalyst and a preparation method. A mixed oxide solution is prepared by taking titanium isopropoxide and aluminum isopropoxide as precursors, polyalcohol as a pore-forming agent and n-propanol as a solvent; the mixed oxide solution and an ammonium carbonate solution are reacted; and a composite carrier is obtained through aging, drying and calcination. A promoter component and an active component are loaded onto the carrier by using an impregnation method, so as to obtain the high-dispersion natural gas hydrodesulfurization catalyst. The application can improve the catalytic activity, improve the space velocity of the hydrodesulfurization reaction under the premise of ensuring the utilization rate of the catalyst, and improve the production capacity of equipment.

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 zinc-titanium composite cluster, a synthesis method thereof and a lithographic patterning application, and relates to a zinc-titanium composite cluster with a general formula I structure, which has the characteristics of high thermal stability, small particle size, uniform distribution, high sensitivity and high resolution. The synthesis method comprises the following steps: dissolving benzoic acid with a R1 substituent group in anhydrous organic solvent, adding a mixture of titanium isopropoxide and zinc acetate, and then washing, filtering and vacuum drying the crystal precipitate after standing to obtain a pure solid product. The zinc-titanium composite cluster is used as a photosensitizer and resin in extreme ultraviolet lithography and electron beam lithography, has excellent high sensitivity and high resolution, and is suitable for the fields of semiconductor manufacturing, nanotechnology and optical element manufacturing. The zinc-titanium composite cluster also has excellent thermal stability and chemical stability, so that the application of the zinc-titanium composite cluster in various extreme environments is possible.