184 results about "Porous titanium" patented technology

The invention discloses a porous titanium-based implant with a photo-thermal surface and a preparation method and application of the porous titanium-based implant, and belongs to the technical field of biomedical materials. The preparation method comprises the steps that a porous titanium substrate is prepared through 3D printing, then flowing acid etching treatment and anodic oxidation treatment are conducted in sequence, then the porous titanium substrate is placed in photo-thermal coating dispersion liquid for reaction, cleaning and drying are conducted, and the porous titanium-based implant with the photo-thermal surface is obtained. The photo-thermal coating dispersion liquid is obtained by dispersing MXene-ZnO composite particles in a dopamine hydrochloride solution. The porous titanium-based implant provided by the invention can be rapidly heated to a proper temperature under the irradiation of near-infrared light, and has good antibacterial, anti-tumor and osteogenesis promoting properties and biocompatibility.

The invention discloses a near-infrared light response titanium-based implant as well as a preparation method and application thereof, and belongs to the technical field of medical materials. The near-infrared light response titanium-based implant provided by the invention comprises a porous titanium substrate, the TiO2 nanotube array is formed on the surface of the porous titanium substrate; the first photo-thermal coating layer is formed on the TiO2 nanotube array; the second photo-thermal coating is formed on the first photo-thermal coating; wherein the first photo-thermal coating is a ZIF-8 coating; and the second photo-thermal coating is a carbon nanotube coating. Through the double-layer photo-thermal system design of the ZIF-8 coating, the photo-thermal conversion efficiency is greatly improved, the controllable photo-thermal response capacity, the long-acting antibacterial and anti-tumor capacity and the dynamic osseointegration capacity are achieved, and the excellent osteosarcoma treatment effect is achieved.

The invention discloses a BDD electrode material and a preparation method thereof. The preparation method comprises the following core steps: pretreating the surface of a porous titanium substrate; depositing a nanoscale TiN film layer on the surface of the pretreated porous titanium substrate in advance; depositing a layer of single-walled carbon nanotube network on the TiN thin film layer by using an electrophoretic deposition method; growing a highly-doped BDD layer on the single-walled carbon nanotube network by adopting a plasma enhanced chemical vapor deposition technology; repeating the two steps to form a multi-layer SWCNT / BDD composite structure, and controlling the thickness of the multi-layer SWCNT / BDD composite structure to be 1-50 microns; and finally, depositing a low-doped BDD active layer with the thickness of 1-5 microns by adopting a hot filament chemical vapor deposition (HFCVD) technology. According to the pulse laser assisted preparation process provided by the invention, the femtosecond laser pulse is introduced to replace traditional plasma treatment, so that the process flow is simplified, and the efficiency is improved; according to the technology, the process is simplified, the quality of the TiN film is improved through accurate energy input, and a new way is opened up for further improving the performance of the BDD electrode.

The invention discloses a photo-thermal-electric coupling titanium-based implant as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The photo-thermal-electric coupling titanium-based implant provided by the invention comprises a porous titanium substrate and a hydrogel layer, the surface of the porous titanium substrate is of a TiO2 nanotube array structure; up-conversion nanoparticles and g-C3N4 nanoparticles are arranged between the porous titanium substrate and the hydrogel layer, and the up-conversion nanoparticles are NaYF4 up-conversion nanoparticles co-doped with Yb < 3 + > and Er < 3 + >; carbon nanotubes and medicinal active ingredients are loaded in the hydrogel layer. According to the titanium-based implant, collaborative coupling in light-heat-electricity multi-energy forms is achieved, the titanium-based implant is endowed with the integrated function of light response, heat conversion, electric signal conduction and local treatment, and an integrated solution with structural supporting, biological activity regulation and treatment effects is provided for bone tissue defect repair.

The invention discloses an anode porous transmission layer for PEM water electrolysis hydrogen production and a preparation method of the anode porous transmission layer. The preparation method comprises the steps that firstly, a porous titanium plate and a titanium mesh are washed and dried after being subjected to acid pickling; secondly, absolute ethyl alcohol, polyvinyl butyral and titanium powder are evenly mixed to be prepared into slurry, and the slurry is sprayed to the two sides of the dried titanium mesh; and 3, stacking the porous titanium plate and the titanium mesh sprayed with the slurry, and forming metallurgical bonding through vacuum diffusion welding to obtain the anode porous transmission layer. The porous titanium plate and the titanium mesh are metallurgically bonded to prepare the anode porous transmission layer, the platinum plating amount is effectively reduced and the catalyst utilization rate is improved by regulating and controlling the thickness and the pore structure of the porous titanium plate and the plate-mesh stacking mode, and the gas-liquid transmission efficiency of the anode porous transmission layer is improved; and the anode porous transmission layer with strong mechanical support and high gas-liquid transmission efficiency is obtained, is suitable for PEM water electrolysis hydrogen production, and meets the development requirements of high efficiency and low cost of hydrogen production through renewable energy source and PEM water electrolysis coupling.

The invention discloses a low-temperature-resistant lithium iron phosphate positive electrode material and a preparation method thereof. The low-temperature-resistant lithium iron phosphate positive electrode material comprises the following raw material components in parts by weight: 90-120 parts of a lithium iron phosphate active material, 10-15 parts of a conductive agent, 8-12 parts of a binder, 5-8 parts of an additive and 60-70 parts of a solvent, the lithium iron phosphate active material is lithium iron phosphate coated with a carbon layer on the surface, and at least one metal element of aluminum, magnesium, chromium, vanadium and cobalt is doped in the lithium iron phosphate active material. The additive comprises nitrogen-doped carbon fibers compounded with titanium dioxide and titanium dioxide fibers coated with a polypyrrole layer; wherein the titanium dioxide fiber coated with the polypyrrole layer is obtained by firstly loading a first pyrrole monomer on a porous titanium dioxide fiber and then polymerizing with a second pyrrole monomer. The low-temperature-resistant lithium iron phosphate positive electrode material disclosed by the invention has excellent low-temperature resistance and conductivity, and the electrochemical performance of a battery at a low temperature can be improved.

The invention relates to the technical field of automobile essence preparation, and particularly discloses automobile essence capable of removing formaldehyde and releasing anions and a preparation method of the automobile essence. Comprising the following raw materials in parts by weight: 500-600 parts of deionized water, 18-24 parts of a negative ion release enhancing component, 12-20 parts of an aldehyde removing component, 30-40 parts of absolute ethyl alcohol, 8-14 parts of a dispersing agent, 14-18 parts of phenoxyethanol, 22-26 parts of an initiator solution and 6-10 parts of citral. A negative ion release enhancing component and a formaldehyde removal component are added, the negative ion release enhancing component is prepared by modifying core-shell particles with a silane coupling agent, the outer layer of each core-shell particle is of a porous titanium dioxide structure, the inner core of each core-shell particle is modified electrical powder, and the formaldehyde removal component is prepared by carrying out a ring-opening esterification reaction on sodium alginate and allyl glycidyl ether, so that the formaldehyde removal effect is improved. And then carrying out chemical cross-linking with hydroxypropyl acrylate and methacrylic acid, thereby coordinating and enhancing the formaldehyde removal capability, the anion release capability and the antibacterial effect.

The application provides a preparation method of a high-performance porous titanium-based intermetallic compound filter and relates to the technical field of filter preparation.The method comprises sequentially performing titanium raw material hydrogenation, micron-sized titanium hydride powder preparation, mixed powder preparation, mixed powder dehydrogenation alloying, micron-sized alloy powder preparation, cold isostatic forming mold preparation of the porous titanium-based intermetallic compound filter, titanium-based filter compact preparation and porous titanium-based intermetallic compound filter preparation.The application uses off-grade titanium as a matrix raw material, adds alloying elements such as aluminum and iron, combines the hydrogenation-dehydrogenation process with high-energy ball milling, and then realizes near forming of the porous titanium-based intermetallic compound filter through cold isostatic pressing and vacuum sintering.The prepared filter has high porosity, uniform pore size distribution and excellent corrosion resistance, can be used stably for a long time in a high-temperature and strong-corrosion environment, can realize efficient and high-precision purification of titanium tetrachloride, and is beneficial to industrial large-scale production and popularization.

A porous titanium sheet configured to function as an anode side gas diffusion layer of a proton exchange membrane (PEM) electrolyzer is formed by a powder technique, such as tape casting or powder metallurgy.

To provide an electrolysis method for water, a manufacturing method for hydrogen, and a manufacturing method for a cell of a PEM type water electrolysis apparatus, in which a titanium porous body within the cell has a relatively smooth surface on an electrolyte membrane side, has air permeability or liquid permeability, and can exhibit relatively high electrical conductivity.SOLUTION: An electrolysis method for water according to the present invention is a method for water electrolysis using a PEM type water electrolysis apparatus comprising a cell including a stack comprising a cathode, an electrolyte membrane, a porous transport layer, and an anode, where the porous transport layer has a titanium porous body, where, at a surface of the titanium porous body facing the electrolyte membrane, an average area of pores opening into the surface is 5 μm2 or more and 45 μm2 or less, where a standard deviation of the area of the pores is 90 μm2 or less, where a number of the pores existing within a rectangular region having an area of 22,000 μm2 and an aspect ratio of 4:3 is 120 or more, and where the PEM type water electrolysis apparatus is used with a pressure acting in a stacking direction of the cathode, the electrolyte membrane, the porous transport layer, and the anode being 6 MPa or more at a time of assembling the cell.SELECTED DRAWING: None

The application provides a TPMS porous titanium-based composite structure based on selective laser melting and a preparation method thereof, relates to the technical field of titanium-based composite materials, and the method takes TC4 titanium alloy powder as a matrix, introduces TiB2 ceramic particles as a reaction precursor, uses high-energy laser action to induce in-situ reaction of TiB2 and the titanium matrix in the selective laser melting process, and generates TiB reinforcing phases; on the basis, a porous structure with periodic continuous curved surface characteristics is constructed by combining a three-period minimal surface structure design method, and the synergistic regulation of material performance and structural performance is realized; it is verified that by regulating process parameters such as laser power, scanning speed and scanning interval, the stable forming of the TPMS porous structure can be realized, and the TiB reinforcing phases are uniformly distributed in the structural matrix; the prepared structure has good mechanical response characteristics while keeping high forming precision, and presents stable deformation behavior and continuous energy absorption process under the action of compression load.

The invention relates to the technical field of polymer coatings, in particular to a solvent-free permeation-resistant anti-corrosion polymer coating and a preparation method thereof. The invention relates to a preparation method of a solvent-free permeation-resistant anti-corrosion polymer coating. The preparation method comprises the following steps: preparation of an MXene nanosheet, preparation of a modified MXene filler, preparation of a slow-release corrosion inhibitor and preparation of a polymer coating. The double modified MXene and the slow-release corrosion inhibitor are adopted to synergistically improve the corrosion resistance of the coating. Modified MXene is subjected to intercalation modification by tannic acid and phytic acid, so that the modified MXene has physical barrier and chemical corrosion inhibition characteristics, the compatibility with a resin interface is enhanced, and the permeation resistance of a solvent-free coating is improved; according to the slow-release corrosion inhibitor, porous titanium-based oxide is used for loading MBT, slow release is triggered when the coating is damaged, active repairing is achieved, the pain point that a traditional coating is damaged and fails is solved, and the corrosion resistance in the severe environment is greatly improved.

The invention belongs to the technical field of implant materials, and discloses a porous titanium-based implant material surface calcium-phosphorus coating and a preparation method thereof. According to the method, a porous titanium-based implant material is used as a cathode, an annular platinum electrode is used as an anode, the cathode is located in the center of the annular electrode, a solution containing calcium and phosphorus is used as an electrolyte, biomimetic mineralization is carried out under the condition of pulse micro-potential, and the calcium-phosphorus coating is formed on the surface of the porous titanium-based implant material. According to the method, the biomimetic mineralization process of the surface of the beam structure in the porous titanium-based material is regulated and controlled by adopting the annular electrode and the weak electric field, migration of ions and ion groups in the porous scaffold is improved by adjusting the current of the annular electrode and combining the biomimetic mineralization process, and the porous titanium-based implant material uniformly covered with the calcium-phosphorus coating is obtained. The method is simple, and uniform covering of the calcium-phosphorus coating of the porous titanium-based implant material is achieved.

The invention discloses a titanium-magnesium nail plate system capable of promoting fracture healing and a manufacturing and forming method. The manufacturing and forming method comprises the steps that a bone fracture plate digital model containing a bone trabecula simulation porous area and a partition filling cavity is established according to a bone anatomical structure, and a titanium-based workpiece of a porous structure is manufactured through selective laser melting forming; a titanium-zinc-calcium component gradient transition layer is constructed layer by layer on the surface of the porous inner wall of the titanium-based workpiece through a directional deposition process, interface bonding is strengthened through low-temperature heat treatment, and the titanium-based workpiece with a gradient interface is obtained; the titanium-based workpiece with the gradient interface is placed in an inert atmosphere, after heating is conducted, molten magnesium or magnesium alloy is injected into all the cavities through a partitioned vacuum pressure injection technology, and after cooling is conducted, a titanium-magnesium composite workpiece is formed; through a customized and interface-controllable manufacturing method, a high-strength titanium skeleton and a degradable healing-promoting magnesium material are firmly combined, and integrated design and manufacturing of mechanical support and biological activity of the internal fixation device are achieved.

The application belongs to the field of ceramic materials, and particularly relates to a preparation method of a porous titanium boride alloy / hydroxyapatite fluoride composite material. 10 (PO4)6OH 2‑2x F 2x Wherein, x is 0.1-0.6; in the mixture, the weight ratio of TC4, TiB2 and FHA is 86-94:3-7:3-7; the sintering temperature is 1000-1100 DEG C. The application also includes the composite material prepared by the preparation method and the application of the composite material in oral implant materials. The preparation method can realize synergy, improve the strength and biological activity of the material based on the combination of components, proportions and sintering processes.

The invention discloses a method for preparing a porous titanium-based material with low mass transfer resistance by using magnetic field induction, and relates to the technical field of electrode manufacturing, and the method comprises the following steps: preparing titanium powder slurry containing magnetic components and titanium powder slurry without magnetic components, and preparing a double-layer or multi-layer composite structure from different slurries; directionally arranging the magnetic components by using a magnetic field; the sintering treatment enables the magnetic components to be decomposed or sintered to generate a directionally-arranged supporting structure, and the directionally-arranged supporting structure is obtained; and continuously sintering at the temperature higher than the first temperature interval, and pickling to remove the directionally arranged support structure to obtain the porous titanium-based material with the dual-scale pore structure, the problems that in the prior art, mass transfer efficiency is low, mass transfer resistance is large, a directional through pore structure is difficult to achieve, cooperative construction of pores with different pore diameters is difficult, the functionality of the pores is single, and the pores are prone to being polluted are solved.

The invention provides a porous titanium black ceramic body, a preparation method and application thereof and an electro-catalysis device. The preparation method comprises the following steps: carrying out sintering molding on a mixture of TiOx powder and a metal oxide type ionic crystal or firstly molding and then sintering to prepare a ceramic body containing the TiOx powder and the metal oxide type ionic crystal; carrying out acid pickling on the ceramic body to obtain a porous TiOx ceramic body; in the TiOx powder, x is more than 0 and less than or equal to 1; or carrying out sintering molding on the mixture of the TiO2 powder and the metal Mg, or firstly molding and then sintering to prepare a ceramic body containing the TiOx powder and the magnesium oxide; carrying out acid pickling on the ceramic body to obtain a porous TiOx ceramic body; in the TiOx powder, xlt is greater than or equal to 1; 2. The porous titanium black ceramic body has conductivity close to metal grade, a through porous structure and full-ceramic chemical stability, the preparation method is simple, the cost is low, and industrial production is facilitated.

The invention discloses a preparation method of a carbon-coated lithium titanate composite silicon negative electrode material, which comprises the following steps: mixing raw materials, carrying out two-stage high-temperature calcination, converting a lithium source and a titanium source into lithium titanate, carrying out disproportionation reaction to convert silicon monoxide into silicon simple substance silicon dioxide, removing silicon dioxide by acid etching, and carrying out carbon coating by chemical vapor deposition to obtain the carbon-coated lithium titanate composite silicon negative electrode material. A final product is obtained. The porous lithium titanate has the characteristics of zero volume expansion, high safety, long service life and low energy density, and the nano silicon has the characteristics of high specific capacity, large volume expansion and poor cycle performance, so that the comprehensive performance of high capacity, long cycle and high safety is finally realized by utilizing the synergistic effect of the porous lithium titanate and the nano silicon; compared with a silane chemical vapor deposition silicon process, the process is safe and low in cost; compared with a process of respectively preparing porous lithium titanate and nano silicon and then mixing, the preparation method disclosed by the invention has the advantages that the problem that nano silicon is easy to agglomerate is avoided, and the electrochemical performance of a finished product is effectively improved.

The invention discloses a method for enhancing fatigue performance of a Ti175 porous titanium alloy, which comprises the following steps of: under the protection of inert atmosphere, quickly putting a sample into a central isothermal area of a tubular furnace preheated to a first target temperature, continuously heating to a second target temperature, preserving heat, converting an original structure into a double-state structure, and cooling to room temperature at a controlled cooling rate; under inert atmosphere protection, the sample is heated to a third target temperature and subjected to heat preservation, then cyclic loads within the elastic range are applied in a stress control mode, and after loading is finished, the sample is cooled to the room temperature at the controlled cooling rate; under the air or inert atmosphere, the sample is rapidly placed into a box-type furnace preheated to a fourth target temperature, the temperature continues to rise to a fifth target temperature, heat preservation is conducted for a short time, residual stress is released, a surface oxygen solid solution strengthening layer is formed, and then the sample is cooled to the room temperature at the controlled cooling rate.

The application discloses a method for preparing an oxide composite insulating layer on a titanium alloy surface and relates to the technical field of insulating material preparation. The titanium alloy is subjected to high-temperature oxidation to obtain a porous titanium oxygen layer, then the porous titanium oxygen layer is subjected to ultrasonic-assisted sealing treatment by using an organic sealing agent, and after solidification, the oxide composite insulating layer is obtained on the titanium alloy surface. The oxide composite insulating layer prepared on the titanium alloy surface has good insulating capacity in a solution environment and is resistant to hydrochloric acid and nitric acid corrosion, and has good application on a gold plating and nickel plating hanger in the watch industry.

The invention relates to the technical field of biomedical material manufacturing, in particular to spraying equipment for a sustained-release coating of a drug-loaded porous titanium fusion cage. The spraying device comprises a spraying gun, the spraying gun comprises a coating flow channel and a spraying head, and a sudden pressure buffering mechanism is arranged between the coating flow channel and the spraying head. According to the device, the flow area of the connecting pipe is increased in real time through movement of the conical flow guide body, magnetorheological fluid is arranged in the storage cavity of the conical column body, and when the conical flow guide body is influenced by coating impact force to move into the storage cavity, a contact, a controller and a fixed coil are triggered to be matched; the magnetic field intensity formed by the fixed coil is changed to quickly adjust the viscosity of the magnetorheological fluid, the moving resistance of the conical flow guide body is controlled in real time when the paint pressure is suddenly increased, the situation that the flow area of the connecting pipe is suddenly changed due to the fact that the conical flow guide body moves too quickly due to the paint pressure is suddenly increased is avoided, and the paint flowing stability is maintained; and the problem that a traditional filtering structure is insufficient in adaptability when the pressure is suddenly increased is effectively solved.

To provide a sheet-like titanium porous body simultaneously reliably achieving an extremely high surface smoothness and a low contact resistance, and to provide a production method of the same.SOLUTION: A sheet-like titanium porous body has a contact resistance of 1.4 mΩ / cm2 or less. On at least one surface of the sheet-like titanium porous body, the average area of pores is 5 μm2 or more 20 μm2 or less, the standard deviation of the area of the pores is 45 μm2 or less, and the number of pores is 13.6 or more per 1,000 μm2. The contact resistance of the sheet-like titanium porous body may be 1.0 mΩ / cm2 or less.SELECTED DRAWING: Figure 1

The application relates to the technical field of titanium disc piece machining equipment, and discloses a forming device and method for pressing and forming porous titanium dioxide disc pieces, which comprises a machine body, the surface of the machine body is provided with a pressing device, the pressing device comprises a lower mold, the lower mold is fixedly connected with the upper surface of the machine body, the upper surface of the lower mold is fixedly connected with a guide column, the upper side of the guide column is fixedly connected with a mounting frame, the upper surface of the mounting frame is fixedly connected with a hydraulic cylinder one, the piston rod of the hydraulic cylinder one is fixedly connected with an upper mold, the lower surface of the upper mold is provided with a forming groove, and the inner wall of the machine body is fixedly connected with a horizontal plate. In the application, the pressing device is arranged, so that the cutting and shaping can be combined during the machining of the forming device, the single workpiece machining time is shortened from 25 seconds to 12 seconds, the material transfer process is reduced, and the production efficiency of the forming device and the workpiece yield are improved.

The invention discloses a 2.5-dimensional antimony-doped tin dioxide / polyurethane-ruthenium-titanium mixed oxide / polymer temperature response type electrocatalytic oxidation electrode and a preparation method, and belongs to the technical field of electrocatalytic oxidation electrode preparation. Amorphous antimony-doped tin dioxide is loaded on molecular sieve particles in a hydrolytic polycondensation reaction and annealing mode; coating a thermal expansion layer formed by polyurethane on the surface to obtain auxiliary electrode particles; bonding a ruthenium-titanium mixed oxide layer on the porous titanium substrate, and then spraying a polymer layer formed by an N-isopropylacrylamide-acrylic acid copolymer to obtain a main electrode; suspending the auxiliary electrode particles on the main electrode, then standing, reducing the diameter of a surface pore channel, close to the auxiliary electrode particles, of the main electrode, heating and expanding a thermal expansion layer, close to one end of the main electrode, of the auxiliary electrode particles, and finally locking the thermal expansion layer in the pore channel of the main electrode to obtain the temperature response type electrocatalytic oxidation electrode. The main electrode and the particle auxiliary electrode are fully and stably combined, the electrode composition structure is endowed with the dynamic self-adaptive adjustment capability, the traditional electrode composition / structure adjustment limitation is overcome, and the in-situ adjustable performance and the in-situ material recovery characteristic are achieved.

The present invention provides a non-precious metal catalyst and a preparation method thereof. The preparation method comprises: preparing a sol, mixing butyl titanate, ammonium fluoride, and ethylene glycol to obtain a sol; preparing a support, first immersing a porous template in the sol, then heating the immersed porous template, and cooling it to obtain a porous titanium dioxide support; preparing a slurry, dissolving basic nickel carbonate, nickel sulfate hexahydrate, nickel chloride hexahydrate, sodium citrate, sodium chloride, boric acid, and cobalt nitrate hexahydrate in deionized water to obtain a slurry; and electrodeposition, immersing the porous titanium dioxide support in the slurry and subjecting the porous titanium dioxide support to a constant potential polarization treatment using a three-electrode system to obtain the non-precious metal catalyst. The preparation method provided by the present invention solves the problems of high cost, low catalytic efficiency, and unstable catalytic activity of existing electrocatalysts.

The application discloses a low-temperature-resistant lithium iron phosphate positive electrode material and a preparation method thereof. The low-temperature-resistant lithium iron phosphate positive electrode material comprises the following raw material components in parts by weight: lithium iron phosphate active material 90-120 parts, conductive agent 10-15 parts, binder 8-12 parts, additive 5-8 parts and solvent 60-70 parts. The lithium iron phosphate active material is lithium iron phosphate coated with a carbon layer, and at least one metal element selected from aluminum, magnesium, chromium, vanadium and cobalt is doped in the lithium iron phosphate active material. The additive comprises nitrogen-doped carbon fiber compounded with titanium dioxide and titanium dioxide fiber coated with a polypyrrole layer. The titanium dioxide fiber coated with the polypyrrole layer is obtained by loading first pyrrole monomers on porous titanium dioxide fiber and then polymerizing the first pyrrole monomers with second pyrrole monomers. The low-temperature-resistant lithium iron phosphate positive electrode material has excellent low-temperature resistance and conductivity, and can improve the electrochemical performance of a battery at low temperature.

The invention provides spatial layered porous titanium dioxide as well as a preparation method and application thereof. The preparation method of the spatial layered porous titanium dioxide comprises the following steps: S1, mixing a carbohydrate carbon source, an organic solvent and water, carrying out hydrothermal reaction, centrifuging, washing and drying to obtain carbon spheres; s2, styrene, water, polyvinylpyrrolidone and potassium persulfate are mixed, heated and stirred, and polystyrene microsphere emulsion is prepared; s3, dispersing carbon spheres in a solvent to prepare a carbon sphere dispersion liquid; s4, under the vacuum filtration condition, dispensing and assembling the carbon sphere dispersion liquid and / or the polystyrene microsphere emulsion to form a hard template with a spatial sequence structure; and S5, completely infiltrating the hard template with TiCl4, and sequentially drying and calcining to obtain the spatial layered porous titanium dioxide. The spatial layered porous titanium dioxide disclosed by the invention shows excellent photocatalytic reaction performance, and has relatively high CO selectivity during photocatalytic reduction of carbon dioxide.

The present application belongs to the field of foot and ankle surgical implant devices and biomedical material surface engineering technology, and discloses a tibial component of ankle prosthesis with a composite coating, which comprises: a metal substrate which is a bionic trabecular three-dimensional interconnected porous titanium alloy structure, the porosity is 50-80%, the average pore size is 400-900 mu m, and the connected porosity is greater than or equal to 85%, so that the elastic modulus is controlled in the range of 5-20 GPa, and is matched with the cancellous bone of the tibia; a composite functional coating is in situ grown on the surface of the metal substrate, and the composite functional coating comprises a bioactive layer and a functional ion doped layer. The tibial component of the present application comprises a porous titanium alloy metal substrate and a composite functional coating constructed in situ on the surface thereof, the porous titanium alloy substrate is designed in a bionic trabecular structure to form a three-dimensional interconnected porous structure, so as to provide an elastic modulus matched with the cancellous bone of the tibia and promote the growth of bone tissue.

This invention discloses a self-lubricating hydrogel titanium alloy biomimetic joint bearing interface and its preparation method. The self-lubricating hydrogel titanium alloy biomimetic joint bearing interface is composed of a porous titanium alloy substrate, a functionalized interface layer, a negatively charged hydrogel layer, and a self-lubricating adsorption layer. A laser drilling method is used to create a porous structure on the surface of a Ti6Al4V substrate. A hydrogel precursor solution is coated onto the surface of the Ti6Al4V sample and cured by ultraviolet irradiation to obtain a negatively charged hydrogel titanium alloy composite sample. The negatively charged hydrogel titanium alloy composite sample is subjected to freeze-thaw cycles and then immersed in zwitterionic or cationic solutions for adsorption, resulting in a hydrogel titanium alloy biomimetic joint bearing interface with self-lubricating properties. The hydrogel titanium alloy biomimetic joint bearing interface of this invention significantly improves the lubrication performance of titanium alloy materials used in artificial joints, achieving biomimetic design of natural joints in terms of tissue structure and lubrication function, and is suitable for the repair and replacement of damaged articular cartilage.