165 results about "Titanium ion" patented technology

The invention relates to an antibacterial PP material and a preparation method thereof, and belongs to the technical field of high polymer materials. The antibacterial PP material is prepared from the following components in parts by weight: 60 to 80 parts of PP resin, 2 to 4 parts of a surfactant, 0.5 to 1.5 parts of a modified antibacterial agent, 0.5 to 1.5 parts of a flame retardant and 0.2 to 0.8 part of an antioxidant, titanium ions in the modified antibacterial agent destroy bacterial cell walls, quaternized intermediate products react with proteins of cell membranes to accelerate bacterial death, and in addition, phenolic hydroxyl groups absorb ultraviolet rays with different wavelengths to inhibit the light aging process; a compact and continuous carbon layer is formed during combustion of the flame retardant and cooperates with phosphorus-oxygen double bonds and melamine, the flame retardant efficiency is improved, aluminum hydroxide coats the surface, hydroxyl is subjected to heat absorption decomposition during combustion, the surface temperature of combustible materials is stabilized, meanwhile, an inert aluminum oxide layer is formed, and the flammability is reduced. The antibacterial PP material prepared by the invention not only has good antibacterial and anti-aging effects, but also has excellent flame retardant property.

The invention belongs to the technical field of battery material production, and particularly relates to a preparation method of high-purity titanium dioxide for batteries. The invention aims to provide a preparation method of high-purity titanium dioxide for a battery. The preparation method is used for solving the technical problem that the impurity removal rate is not increased by improving a preparation method of an additional seed crystal and optimizing procedures in the prior art. The titanium slag is used as a raw material, a metatitanic acid crude product is obtained after alkali baking pretreatment, acidolysis and hydrolysis, redundant impurities are removed through subsequent procedures, and the high-purity titanium dioxide for the battery is obtained. The titanium slag subjected to alkali roasting treatment is changed in component structure, the concentration and temperature of sulfuric acid required by acidolysis are greatly reduced, oxalic acid and a complexing agent are added in the hydrolysis process to hydrolyze titanium ions to form metatitanic acid, the purity of the metatitanic acid is greatly improved, seed crystals prepared through ultrasonic treatment are added, and the prepared metatitanic acid can be calcined at a low temperature to form rutile type titanium dioxide. The prepared titanium dioxide has high purity and relatively high specific surface area.

The invention discloses a flow battery electrolyte, preparation thereof and a flow battery. The electrolyte comprises a positive electrode electrolyte and a negative electrode electrolyte, the positive electrode electrolyte contains vanadium ions, the negative electrode electrolyte contains titanium ions and chromium ions, and both the positive electrode electrolyte and the negative electrode electrolyte contain acid and compounds containing sulfonic acid groups. The preparation method of the electrolyte comprises the following steps: mixing acid and a sulfonic acid group-containing compound to obtain a solvent, dissolving a vanadium compound by adopting the solvent, and filtering to obtain first filtrate; adjusting the average valence state of vanadium ions to be 4, filtering and taking filtrate to obtain a positive electrode electrolyte; dissolving a titanium compound and a chromium compound by adopting the solvent, and filtering to obtain a second filtrate; and adding water into the second filtrate, and adjusting the concentrations of titanium ions and chromium ions to obtain the negative electrode electrolyte. The electrolyte, a positive electrode, an ion conduction membrane and a negative electrode are further assembled into the flow battery. The electrolyte and the flow battery have the characteristics of high energy density and low cost.

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 provides a high-temperature lead-free piezoelectric ceramic material, and the chemical composition of the high-temperature lead-free piezoelectric ceramic material is Bi (4-x) AxTi (2.97) (B11 / 3B22 / 3) 0.03O12, 0 lt, xlt; a is a doping element of metal cations with the radius close to Bi < 3 + >, B1 is a doping element of low-valence metal cations, B2 is a doping element of high-valence metal cations, and B1 and B2 form non-equivalent doping of the high-valence metal cations and the low-valence metal cations. The mode that A-site bismuth ions and B-site titanium ions in Bi4Ti3O12 are replaced by A / B-site composite doping is adopted, metal cation elements with the radius close to Bi < 3 + > are used for A-site doping, meanwhile, B1 elements and B2 elements are used for B-site non-equivalent doping, and the effect of improving the piezoelectric property is achieved while the high Curie temperature is kept. The invention also provides a preparation method of the high-temperature lead-free piezoelectric ceramic material.

The invention relates to the technical field of coating materials, and discloses a pure titanium micro-arc oxidation coating for a vacuum cup and a preparation method thereof.The preparation method comprises the following steps that surface pretreatment is conducted, specifically, a pure titanium vacuum cup inner container workpiece is sequentially subjected to degreasing, acid pickling and ultrasonic cleaning; preparing an electrolyte, namely adding 15-25 parts by weight of a silicon-containing compound, 5-12 parts by weight of metal salt, 3-8 parts by weight of an antibacterial agent and 1-5 parts by weight of a stabilizer into deionized water, and controlling the pH value to be 8.5-10.5; and performing micro-arc oxidation treatment. According to the invention, a silane compound in the micro-arc oxidation electrolyte contains a high-activity silanol group which is subjected to condensation reaction with titanium hydroxyl on the surface of a pure titanium substrate under the action of an electric field to form stable covalent bonding, so that the bonding strength of the coating and the substrate is enhanced; metal ions generated by metal salt electrolysis are co-deposited with titanium ions through plasma discharge, a composite oxide structure is constructed, and micro defects on the surface of a titanium substrate are sealed.

The invention relates to a steel welding method. The steel welding method comprises the following steps that microalloyed steel is provided; laser surface alloying treatment is conducted on the area, to be welded, of the microalloyed steel, and an alloy layer is formed in the area to be welded; injecting nitrogen ions and titanium ions into the alloy layer through an ion injection process to obtain a to-be-welded layer; welding the microalloyed steel by taking the to-be-welded layer as a welding operation area, and obtaining a welded part after welding is completed; the welding workpiece is subjected to annealing treatment, and according to the mass percent of the microalloyed steel, the microalloyed steel comprises 0.05%-0.5% of neodymium, 0.05%-0.5% of lanthanum, 0.3%-1.5% of niobium and 0.3%-1.5% of molybdenum. According to the steel welding method provided by the embodiment of the invention, the material of the welding structure can have high tensile strength and impact toughness, and welding defects can be reduced.

The invention discloses a preparation method of a chemically modified titanium-based sensor, which comprises the following steps: pretreatment of a titanium electrode: polishing the surface of the titanium electrode to be smooth and flat, and carrying out ultrasonic cleaning and drying; and chemical modification of the titanium electrode: firstly carrying out nano material modification on the pretreated titanium electrode, and then carrying out functional molecule modification. The invention further discloses a chemically modified titanium-based sensor, application of the chemically modified titanium-based sensor and a method for detecting the titanium content. According to the chemically modified titanium-based sensor provided by the method, the selective adsorption capacity to titanium ions is improved, the accuracy and the reliability of an analysis result are improved, high-sensitivity detection of the titanium content can be realized, and the concentration range is wide.

A method for preparing iron phosphate from an iron phosphorus slag includes: adding the iron phosphorus slag into an alkaline solution to carry out a reaction followed by a solid-liquid separation to obtain a residue and a first filtrate containing meta-aluminate ion and phosphate ion; adding an acid solution into the first filtrate to carry out an aluminum-removing reaction followed by a solid-liquid separation to obtain a second filtrate containing phosphate ion; mixing the residue with an acid solution to carry out a carbon-removing reaction followed by a solid-liquid separation to obtain a carbon residue and a third filtrate containing iron ion, titanium ion, and copper ion; adding metallic iron into the third filtrate to carry out a titanium and copper-removing reaction followed by a solid-liquid separation to obtain a fourth filtrate containing ferrous ion; mixing an oxidant, the second filtrate, and the fourth filtrate to carry out a reaction followed by a solid-liquid separation and a sintering process in sequence to obtain the iron phosphate.

The method for producing iron phosphate using iron phosphorus slag includes the steps of adding iron phosphorus slag to an alkaline solution, reacting the slag, and then performing solid-liquid separation to obtain a filter cake and a first filtrate containing metaaluminate ions and phosphate ions; adding an acid solution to the first filtrate to perform a dealumination reaction, and then performing solid-liquid separation to obtain a second filtrate containing phosphate ions; mixing the filter cake and the acid solution to perform a decarbonization reaction, and then performing solid-liquid separation to obtain a third filtrate containing iron ions, titanium ions and copper ions; adding metallic iron to the third filtrate to perform a detitanization and decopperization reaction, and then performing solid-liquid separation to obtain a fourth filtrate containing ferrous ions; and mixing an oxidizing agent, the second filtrate, and the fourth filtrate to react with each other, and then performing solid-liquid separation and sintering in this order to obtain iron phosphate.

The invention discloses a slow automatic gas generation foam gel base fluid and a preparation method thereof, and relates to the technical field of oil exploitation and profile control and water plugging. The slow-speed gas self-generating foam gel base solution comprises a gas generating agent, a thickening agent, a pH stabilizer, a cross-linking agent, a foaming agent and water, the gas generating agent comprises an amine substance and a nitrous acid oxidizing agent, the pH stabilizer is a buffer solution, the cross-linking agent is a cross-linking agent, and the foaming agent is a foaming agent. The cross-linking agent is a coordination compound formed by one or more of titanium ions, chromium ions, aluminum ions, zirconium ions or boron ions and organic acid. The slow-speed gas self-generating foam gel base fluid provided by the invention realizes controllability and slow speed of cross-linking reaction and gas generation reaction, and can improve the stability of the base fluid at normal temperature, prolong the cross-linking time and the gas generation period and improve the gas generation efficiency during application. The safety of the system can be enhanced, the injection pressure of the base fluid can be reduced, the plugging strength can be improved, deep profile control and plugging can be realized, and the crude oil recovery rate can be improved.

The invention relates to a sapphire and titanium sapphire composite laser crystal which is composed of sapphire and a titanium sapphire crystal. The doping concentration of the titanium ions is 0-0.8%. And growing by a Bridgman-Stockbarger method. The preparation method has the advantages that 1) the high-quality and large-size composite laser crystal can be obtained through one-time crystal growth, the crystal interface is stable, high power density can be borne, and the crystal is an excellent gain medium of a high-power laser; and 2) the Bridgman-Stockbarger method is utilized to grow the composite crystal, so that the operation steps are simplified, a plurality of crystal surface treatment procedures are omitted, the production cost is reduced, and the possibility of generating defects such as color center, wrappage and degumming in the crystal compounding process can be avoided.

The invention belongs to the technical field of catalysts and application thereof, and particularly relates to a preparation method and application of a framework nickel-doped TS-1 type molecular sieve catalyst. According to the method, TS-1 titanium silicalite molecular sieve raw powder prepared from cheap raw materials is adopted as an initial raw material, nickel cations are introduced into a TS-1 molecular sieve framework in a mode of combining nickel ion coordination complexation with tetrapropylammonium hydroxide hydrothermal treatment, and a hollow cavity is formed in a molecular sieve crystal. The protective effect of the complexing agent on nickel ions effectively prevents the nickel ions from forming metal nickel particles in the hydrothermal treatment process; the tetrapropylammonium hydroxide promotes the TS-1 titanium silicalite molecular sieve to be dissolved and recrystallized to form closed or open mesopores, and nickel ions are embedded into a molecular sieve framework. In the prepared nickel-doped TS-1 titanium silicalite molecular sieve, nickel exists in the form of positive ions and partially replaces titanium ions in a framework, so that the charge density around the titanium ions is remarkably reduced, and the surface acidity is weakened.

The invention relates to a trace sample extracellular vesicle enrichment method based on a synergistic effect. According to the method, 1, 2-distearoyl-sn-glycerol-3-phosphoethanolamine (DSPE) and tetravalent titanium ions (Ti (IV)) are modified in a channel of a micro-fluidic chip, and synergistic enrichment of the extracellular vesicles in a trace sample is realized by utilizing a dual affinity effect. The method is based on a synergistic enrichment principle, can simply, conveniently and efficiently realize high-selectivity, high-purity and high-recovery-rate separation of the extracellular vesicles in the trace sample, has the advantages of few required samples, wide application range, low use cost, high enrichment efficiency and the like, and has important significance on efficient separation of the extracellular vesicles in the trace sample.

The invention relates to the technical field of medical instruments for treating aneurysm, and particularly discloses a vascular spring ring and a coating preparation process thereof. The preparation process of the coating of the vascular spring ring comprises the following steps: S1, taking a tungsten filament, and cleaning the tungsten filament; and S2, the tungsten filament is etched through ion plating. And S3, the surface of the tungsten filament is cleaned through titanium ions, a titanium layer is deposited on the surface of the tungsten filament, and the thickness of the titanium layer is 0.015-0.025 microns. And S4, a gold layer is deposited on the surface of the titanium layer, the thickness of the gold layer is 0.15-0.25 [mu] m, and the raw material wire is obtained. And S5, the raw material wire is manufactured and formed, and the vascular spring ring is obtained. In the process, the tungsten filament is etched through ion plating, so that the surface roughness is improved, and the adhesive force of a subsequent coating is enhanced. And titanium ion cleaning is carried out, and ion plating etching residues are removed. And the thin titanium layer enhances the adhesive force of the pure gold layer. Due to the outermost gold layer, the vascular spring ring has good biocompatibility and corrosion resistance.

The invention provides application of titanium black in preparation of a titanium-based lithium adsorbent, the titanium-based lithium adsorbent as well as a preparation method and application of the titanium-based lithium adsorbent, and particularly relates to the technical field of lithium adsorbents. The chemical formula of the titanium black is Ti4O7, and the titanium black has a sodium chloride type cubic crystal form and a rutile type tetragonal crystal form. Titanium black (Ti4O7) with a sodium chloride type cubic crystal form and a rutile type tetragonal crystal form is adopted as a titanium source, and the valence states of titanium in the Ti4O7 comprise positive trivalence (Ti < 3 + >) and positive tetravalence (Ti < 4 + >). Due to the existence of the two valence states, the titanium black has the structural characteristics of a sodium chloride type cubic crystal form and a rutile type tetragonal crystal form at the same time. The unique crystal structure provides two different occupied sites for lithium ions, and the number of adsorption sites of the lithium ions is increased. In addition, due to existence of the positive trivalent titanium ions, rapid migration of lithium ions in crystal lattices of the titanium-based lithium adsorbent can be promoted, and therefore the adsorption rate of the titanium-based lithium adsorbent is effectively increased.

The invention provides a method for removing a low-temperature oxidation film on the surface of a titanium alloy plate strip and a regeneration method of a used solution, and relates to the technical field of metal surface cleaning. Comprising the steps that firstly, a titanium alloy plate strip is subjected to rolling deformation, cooled and then soaked in a mixed aqueous solution of oxalic acid and sodium chloride at the temperature of 60-80 DEG C, meanwhile, the titanium alloy plate is connected to a positive electrode of a direct-current power source, and the mixed aqueous solution used in the soaking process serves as an electrolyte to remove an oxidation film on the surface of the titanium alloy through electrolysis. A mixed solution of oxalic acid and sodium chloride is adopted as an electrolyte to soak and electrolyze a titanium alloy plate strip, on one hand, the complexing effect of oxalic acid on titanium ions effectively promotes chemical dissolution of an oxide layer, on the other hand, chloride ions assist in stripping the oxide layer through pitting corrosion, and the reducibility of oxalic acid can inhibit excessive corrosion of a matrix. A titanium alloy plate strip is connected to a direct-current power supply, and a dense titanium dioxide oxide layer is rapidly dissolved by means of the synergistic effect of electrolysis. And the solution regeneration method is used, so that the green recycling of the solution can be realized.

The invention provides a lithium manganese iron phosphate / titanium carbide heterojunction positive electrode material, a preparation method thereof, a positive plate and a lithium ion battery. The chemical structural formula of the lithium manganese iron phosphate / titanium carbide heterojunction positive electrode material is LiMn1-xFexPO4 / Ti3C2, wherein x is more than or equal to 0.1 and less than or equal to 0.9. In the lithium manganese iron phosphate / titanium carbide heterojunction positive electrode material, a part of titanium ions occupy an M site in lithium manganese iron phosphate to form a metal-hole pair, so that the Jahn-Teller effect can be reduced, the dissolution of manganese ions caused by lattice distortion in the circulation process can be reduced, and the service life of the lithium manganese iron phosphate / titanium carbide heterojunction positive electrode material is prolonged. Further, the structural stability and the cycle performance of the lithium manganese iron phosphate / titanium carbide heterojunction positive electrode material can be improved. Besides, reversible high capacity is realized by constructing a heterostructure and titanium carbide absorbing and utilizing lattice oxygen, and a stable positive electrode / electrolyte interface is obtained, so that a positive electrode system is favorably stabilized, and stable output of electrochemical performance is favorably promoted.

The present invention belongs to the technical field of titanium metal processing waste acid treatment, and specifically relates to a method for regenerating titanium metal pickling waste liquid. The regeneration method comprises the following steps: adding a fluorosilicic acid solution to the titanium metal pickling waste liquid and mixing uniformly, then adding a potassium salt solution, stirring the reaction at room temperature, and centrifuging or filtering after the reaction is complete to separate the solid portion as a potassium fluorotitanate / potassium fluorosilicate complex; and the liquid portion as a regenerated titanium metal pickling liquid. The method of the present invention can significantly improve the titanium ion recovery rate without destroying the pickling liquid components. The titanium metal pickling waste liquid can be regenerated and reused, and has the advantages of good treatment effect and simple treatment process.

The invention relates to the technical field of surface and interface modification of a battery positive electrode material, and discloses a surface and interface modification method of a Prussian blue positive electrode material, which comprises the following steps: mixing sodium citrate and FeSO4. 7H2O in deionized water to prepare a 100mL solution marked as a solution a; the mass ratio of the sodium citrate to the FeSO4. 7H2O is (6-8): (1-3); dissolving sodium citrate and Na4Fe (CN) 6. 10H2O in deionized water to form a 100mL solution, and marking the 100mL solution as a solution b; the mass ratio of the sodium citrate to the Na4Fe (CN) 6. 10H2O is (6-8): (1-2.5). The material is prepared by adopting a coprecipitation method, modification of the surface interface of the Prussian blue positive electrode material is realized by directly utilizing metal titanium ions, and the method is simple and efficient in experimental operation and mild in condition, and has a relatively wide application prospect in actual industrial application.

Examples are disclosed that relate to the use of acid-stabilized precursor solutions for forming low-cracking and crack-free titanium-containing oxide films by liquid phase deposition. One example provides a method for forming a titanium-containing oxide film by liquid-phase deposition. The method comprises film a substrate with an acid-stabilized aqueous precursor solution to form a film. The acid-stabilized aqueous precursor solution comprises titanium ions, one or more other metal ions, a photolyzable and / or pyrolyzable ligand, and an acid. The method further comprises exposing the film to one or more of heat or light. Examples are also disclosed that relate to forming optical devices using liquid phase deposition of metal oxide films.

The invention belongs to the technical field of petrochemical catalysis, and relates to a process for preparing Ti-Beta zeolite based on a local structure reconstruction method. The main technical characteristics are as follows; the Ti-Beta zeolite is prepared by using water vapor to assist a tetraethylammonium bromide template agent and alcohol amine weak organic alkali to carry out local desilicication etching and repair reconstruction on hydroxyl nests of the dealuminated Beta zeolite. The method provided by the invention has the beneficial effects that the dissolution amount of silicate is limited by the combination of the tetraethylammonium bromide template agent and the alcohol amine weak organic base, and the pore channel condensation liquid and the zeolite solid surface liquid film generated by dealuminating the Beta zeolite in saturated steam; the controllable etching desiliconization of the dealuminated Beta zeolite hydroxyl nest is easier; and the admitting ability of the hydroxyl nest to titanium ions with larger volume is improved. Local structure defects generated by controllable etching desilicication can be repaired by directly using quaternary ammonium cations provided by a TEABr template agent as a guiding agent, so that the method does not need the assistance of fluoride or / and an aluminum source.

The present application belongs to the field of petroleum chemical catalysis technology, and relates to a process for mass production of Ti-Beta zeolite based on local structure reconstruction method. The main technical features include: using water vapor assisted tetraethylammonium bromide template agent and alcohol amine weak organic base, and preparing Ti-Beta zeolite by local desilicon etching and repair reconstruction on the hydroxyl pit of dealuminated Beta zeolite. The benefits of the present application include: the combination of tetraethylammonium bromide template agent and alcohol amine weak organic base, and the limitation of the amount of silicate dissolved by the channel condensate liquid generated by dealuminated Beta zeolite and the liquid film on the surface of zeolite solid in saturated steam, which makes it easier to control the etching desilicon of the hydroxyl pit of dealuminated Beta zeolite and improves the receiving capacity of the hydroxyl pit to titanium ions with larger volume. The local structure defects generated by controllable etching desilicon can be directly repaired by using the quaternary ammonium cation provided by the TEABr template agent as a directing agent, so that the present application does not need to be assisted by fluoride or / and aluminum source.

The invention discloses a ferrous sulfate purification method and a ferrous sulfate purified product, and the method comprises the following steps: dissolving a titanium dioxide by-product in deionized water to obtain a ferrous sulfate saturated solution; under the condition that reducing gas is introduced into the ferrous sulfate saturated solution, mixing sodium sulfide with the ferrous sulfate saturated solution, and filtering to obtain a first purified solution; mixing sodium sulfide with the first purified solution, and filtering to obtain a second purified solution; and carrying out concentration crystallization on the second purified solution, and carrying out suction filtration and drying to obtain a ferrous sulfate purified product. Iron powder does not need to be added, oxidation of ferrous ions is inhibited through reducing gas, sodium sulfide is added in stages to enable impurities with high activity to react to generate sulfide precipitates, the sulfide precipitates are filtered, the content of impurities such as titanium ions, magnesium ions, manganese ions and calcium ions is greatly reduced, the impurity removal effect is good, and finally concentration and crystallization are conducted through solubility difference. The purification purity of the ferrous sulfate purified product is generally as high as 99% or above.

A redox flow battery (RFB) is provided. The battery generally includes a catholyte including cerium ions, an anolyte including titanium ions, a porous cathode in contact with the catholyte, a porous anode in contact with the anolyte, and an ion exchange membrane positioned between the cathode and the anode, where the anode has a higher surface area than the cathode or the anode has a thickness greater than a thickness of the cathode, where the membrane is configured to restrict and / or prevent the passage of the cerium ions and / or the titanium ions and maintain ionic conductivity between the catholyte and the anolyte. A method for storing electricity and a method for generating an electrical current are also provided.

The invention relates to a high-purity ethylene production method and system. The production method comprises the following steps: S1, gasifying: pressurizing an industrial ethylene raw material and gasifying; s2, primary adsorption and purification: feeding the gasified industrial ethylene raw material gas into a primary adsorber for primary purification, and removing H2O, C2H2, CO2 and hydrocarbon impurities above C3 from the raw material gas through the primary adsorber; s3, secondary adsorption and purification: introducing the primarily purified ethylene gas subjected to primary adsorption and purification into a secondary adsorber, and carrying out adsorption-expansion desorption to obtain quasi-high-purity ethylene; s4, entering a multi-stage membrane filtration unit: enabling the quasi-high-purity ethylene subjected to secondary adsorption purification to sequentially penetrate through a plurality of membranes loaded with metal ions, so as to obtain high-purity ethylene; the metal ions are one or a mixture of more of silver ions, cobalt ions, copper ions and titanium ions. Compared with the prior art, the method provided by the invention has the advantages of short flow, low energy consumption, good separation effect, strong process continuity, high product purity and low impurity content, and can meet the production of high-purity ethylene above G5 requirements.

The present invention relates to a lithium-titanium composite oxide comprising primary particles coated with aluminum and a method for preparing the same. The lithium-titanium composite oxide containing primary particles coated with aluminum according to the present invention is characterized in that after the lithium-titanium composite oxide is prepared, re-pulverized particles are mixed with an aluminum compound and then spray-dried to prepare secondary particles, and the primary particles are coated with aluminum. Thus, a battery comprising the lithium-titanium composite oxide comprising primary particles coated with aluminum according to the present invention exhibits an effect of suppressing the generation of gas due to decomposition of an electrolyte and residual lithium caused by titanium ions in a conventional lithium-titanium composite oxide.

This invention discloses a class of polynuclear metal catalysts, their preparation methods, and their application in the catalytic alcoholysis of polyester polymers. The polynuclear metal catalyst comprises an organic ligand and metal ions (titanium ions, zirconium ions, or hafnium ions). The general chemical formula of the polynuclear metal catalyst is shown in formulas (I) and (II). The polynuclear metal catalyst of this invention can catalyze the rapid alcoholysis of general-purpose polyester polymers such as PET in alcohol solvents. The method is simple, safe, efficient, energy-saving, and yields high purity and high efficiency of the recovered monomers.

The invention discloses a photoresponse nano-enzyme array sensor as well as a preparation method and application thereof, and belongs to the technical field of neurotransmitter detection. The photoresponse nano enzyme array sensor comprises MOF1, MOF2 and MOF3, organic ligands of the MOF1, the MOF2 and the MOF3 are all ZnTCPP, and metal ions of the MOF1, the MOF2 and the MOF3 are respectively zinc ions, titanium ions and aluminum ions. By means of the large specific surface area of MOFs, the interaction between a reaction substrate and catalytic activity sites in the material is enhanced, the response sensitivity of the sensor is remarkably improved, the catalytic activity can be regulated and controlled through illumination according to the light response characteristic of the sensor, and dynamic signal amplification of neurotransmitters is achieved. The array sensor can be used for detecting various neurotransmitters and realizing accurate distinguishing and quantification within a few minutes. Even in a complex biological sample, the photoresponse nano-enzyme array sensor can still keep high precision.

Examples are disclosed that relate to the use of acid-stabilized precursor solutions for forming low-cracking and crack-free titanium-containing oxide films by liquid phase deposition. One example provides a method for forming a titanium-containing oxide film by liquid-phase deposition. The method comprises film a substrate with an acid-stabilized aqueous precursor solution to form a film. The acid-stabilized aqueous precursor solution comprises titanium ions, one or more other metal ions, a photolyzable and / or pyrolyzable ligand, and an acid. The method further comprises exposing the film to one or more of heat or light. Examples are also disclosed that relate to forming optical devices using liquid phase deposition of metal oxide films.