176results about How to "Optimize process flow" patented technology

The invention discloses a pipe production task management method and system, and belongs to the technical field of pipe production, and in the pipe production task management method and system, factors such as order priority, equipment state and raw material supply are analyzed through an intelligent algorithm, and the production schedule is automatically optimized, so that production resources are utilized more reasonably and efficiently. Resource waste can be avoided, idle time in the production process is shortened, and therefore production efficiency and the productivity utilization rate are improved. The urgency degree and the delivery date of the order are analyzed through an intelligent algorithm, and the enterprise can preferentially arrange the production of the urgent order to ensure that the customer demand is met in time. Meanwhile, production tasks are reasonably distributed according to the running state of the equipment and the raw material supply condition, and the use efficiency of the equipment and the utilization rate of raw materials are improved. The dynamic adjustment mechanism monitors the production progress in real time and automatically adjusts the production plan according to the actual situation, so that the system can rapidly adjust the production plan and distribute the tasks to other devices, and continuity and on-time delivery of the production tasks are ensured.

The invention belongs to the field of medical materials, and particularly relates to gradient-structure hydrogel, a preparation method thereof and a medical product. According to the invention, DMSO aqueous solutions with different concentrations are used as solvents and PVA is used as a solute, and the obtained different precursor solutions are used for constructing a diffusion system in a layered injection molding manner, so that a concentration transition region presents a gel material with PVA microcrystal density, crosslinking degree and gel product pore diameter changing in a gradient manner along the thickness direction; components in the concentration transition area achieve in-situ gel forming, the microstructure of the material achieves interlocking of microcosmic layers, and no obvious interlayer interface exists. By changing the ratio of PVA, DMSO and water of the compact layer precursor solution and the loose layer precursor solution, the duration of the low-temperature process and the duration of the aging treatment, material microstructures of near surface layers of the upper surface and the lower surface can be regulated and controlled on the basis, and material structures with different microstructures are obtained.

The invention discloses a wire cutting machine for screw production. The wire cutting machine comprises a base, a feeding cutting device arranged at one end of the base and a cold heading device arranged at the other end of the base. The feeding and cutting device comprises a cutting base, and the cutting base is provided with a straightening groove position and a forming positioning hole. The cutting seat is provided with a material pushing mechanism on one side of the straightening slot position; the pushing mechanism is provided with a pushing shaft which is arranged in the forming positioning hole in a sliding mode. The cutting base is provided with a cutting assembly. A straightening device is arranged at the position, corresponding to the straightening groove position, of the base; the straightening device is provided with a straightening channel; the straightening device is in one-way transmission connection with the pushing mechanism; a material moving mechanism is arranged at the position, corresponding to the straightening channel, of the base; continuous production of screws is achieved, so that the production efficiency is improved, the coordination time of cutting and cold heading is effectively shortened, and the consistency of products is better.

The invention relates to a process monitoring and early warning method based on process specifications, belongs to the field of metallurgy, and solves the problems that in the prior art, key indexes in the production process are difficult to monitor and record in real time, and the improvement of the production management level and the product quality stability are affected. According to the invention, digital process specifications are integrated to the monitoring system, so that real-time acquisition of production data and integration of material information are realized. The system compares data in real time and pre-warns deviation through a space-time monitoring mechanism, automatically generates a process discipline report to support quality control, and guides production operation and dynamically optimizes the process flow by using an algorithm. And a continuously improved closed-loop management system is formed by continuously optimizing a monitoring result, so that the production efficiency and the product quality are improved. The control capability of the production process is remarkably improved, the product quality is guaranteed, and finally the double improvement of the production efficiency and the economic benefit is achieved.

The invention provides a composite sodium supplementing agent, a sodium-ion battery positive plate and a preparation method of the sodium-ion battery positive plate, and relates to the technical field of sodium-ion batteries. The composite sodium supplement provided by the invention comprises the following components in percentage by mass: 10%-30% of an alkaline sodium supplement and 70%-90% of acidic sodium salt. The acidic sodium salt and the alkaline sodium supplementing agent are compounded according to a certain proportion, the alkaline sodium supplementing agent is used for providing sufficient sodium ions, the acidic sodium salt neutralizes the alkalinity of the positive electrode slurry, oxalic acid does not need to be additionally added to adjust the pH value when the positive electrode slurry is prepared, the technological process of positive electrode preparation is optimized, meanwhile, the situation that an electrode cannot be prepared due to a gel phenomenon is avoided, and the service life of the electrode is prolonged. And the first coulombic efficiency and the cycling stability of the sodium ion battery can be effectively improved.

The invention discloses photocuring 3D printing metal slurry and a preparation method thereof.The photocuring 3D printing metal slurry is prepared from, by mass, 30%-77% of organic monomers, 0.001%-20% of dispersing agents, 0.1%-6% of photoinitiators and 10%-67% of composite powder; the composite powder comprises an organic shell and a metal core. The compatibility of an organic matter shell and an organic monomer of the composite powder in the slurry is better, and the chemical interaction force of the surface is larger, so that the dispersion of the composite powder in an organic monomer solution is promoted, and good stability is provided for the photocuring slurry; the refractive index of the organic matter serving as the shell is close to the refractive index of the organic monomer solution, the refractive index difference between the powder and the organic monomer solution is reduced, the curing thickness of the slurry is greatly increased, and the stable photopolymerization slurry with the good curing characteristic is obtained.

The invention relates to a preparation method of AnO2 type MOX fuel powder, which comprises the following steps: preparing a mixed actinide eutectic melt from a mixed actinide salt and a urea solid, and carrying out deamination and denitrification / decarbonization on the mixed actinide eutectic melt to directly obtain the AnO2 type MOX fuel powder, the mixed actinide salt consists of tetravalent actinide nitrate and tetravalent actinide oxalate; when the tetravalent actinide nitrate is a plutonium nitrate pentahydrate solid, a thorium nitrate hexahydrate solid or a U (NO3) 4.3-4H2O solid, and the tetravalent actinide oxalate is a thorium oxalate hexahydrate solid, a plutonium oxalate hexahydrate solid or an oxalic acid U (IV) solid, the AnO2 type MOX fuel powder is (ThxPu1-x) O2, (UxTh1-x) O2 or (UxPu1-x) O2 powder. According to the preparation method, plutonium nitrate / thorium nitrate / U (NO3) 4. 3-4H2O and thorium oxalate / plutonium oxalate / oxalic acid U (IV) are directly adopted as raw materials, the preparation process flow of the AnO2 type MOX fuel powder can be simplified, the use of process reagents is reduced, and no process waste liquid is generated, so that the preparation method of the MOX fuel powder, which is simple, convenient, high in production efficiency, free of waste liquid and more economical and green, is provided.

The invention provides an oral cavity soluble film solution based on a nano-carrier and a preparation method of an oral cavity soluble film. According to the method, a nano-carrier technology, microcapsule multilayer coating, a low-temperature electrochemical polymerization method and an ultrasonic dispersion technology are utilized, and uniform distribution and multi-stage slow release of a medicine in an oral instant film are achieved. According to the invention, active pharmaceutical ingredients are firstly wrapped by a nano-carrier, and then a multi-layer composite coating structure is formed by a microcapsule technology, so that drug release effects at different stages are realized. And then, uniformly mixing the microcapsule nano-drug particles with a film-forming substrate, depositing layer by layer to form a film through a low-temperature electrochemical polymerization method, and carrying out low-temperature drying treatment. The soluble film disclosed by the invention has good biocompatibility and mechanical strength, and can be gradually dissolved in an oral cavity, and the medicine is released according to a set stage, so that a long-acting oral care or treatment effect is realized. The method avoids the use of high temperature and organic solvents, is environment-friendly and safe, and is suitable for delivery systems of various oral drugs.

The invention discloses a process for preparing a negative electrode material from natural graphite and waste batteries, which belongs to the technical field of negative electrode material preparation and comprises seven steps of natural graphite pretreatment, waste battery pretreatment, flotation, spheroidization, coating pre-carbonization, impurity removal, modification treatment and finished product preparation. Natural graphite and waste batteries are adopted as raw materials, resources are effectively recycled and utilized, resource waste is reduced, the whole technological process is optimized, impurity removal and modification are integrally treated, technological steps are reduced, the preparation efficiency of the negative electrode material is improved, energy consumption and cost are reduced, and the method is suitable for industrial production. And moreover, in the treatment process, the pollution to the environment is reduced, the emission of harmful substances caused by a traditional acid leaching method is avoided, and the obtained negative electrode material is higher in purity and excellent in electrochemical performance, and can meet the high requirement of the lithium ion battery on the negative electrode material.

The invention relates to the related technical field of metal stamping, discloses an automatic progressive stamping die, and aims at solving the problem that the precision of a conveying mechanism is reduced due to the fact that the workpiece demolding process is complex. The two shaping female die bases are attached together through the composite push frame, so that stamping forming of a workpiece is achieved, after stamping is completed, the stamped workpiece can be horizontally conveyed to a next punching die through separation of the shaping female die bases, and in this way, on one hand, stamping forming of the cylindrical workpiece is achieved, and on the other hand, the stamping forming efficiency is improved. And the problem that the moving path of the conveying mechanism is too complex after the workpiece is formed can be solved, and the positioning accuracy of the follow-up punching die is further guaranteed.

The invention discloses a cord fabric dipping glue solution preparation management system, and relates to the technical field of glue solution production, the cord fabric dipping glue solution preparation management system comprises an order interaction unit, an order sequence making unit, a glue solution preparation management and control unit and a glue solution preparation monitoring unit; the order interaction unit is used for establishing connection between the enterprise resource planning system and the client to obtain a glue solution production order; the order sequence formulating unit is used for carrying out priority ranking on the glue solution production orders based on the client demand responsivity; and the glue solution preparation management and control unit is used for generating a raw material process formula based on a predefined raw material proportioning rule, and preparing a glue solution required by the glue solution production order according to the working procedures in the raw material process formula and the raw material combination. Through docking with an enterprise communication platform, important production information, abnormal alarms or task instructions can be pushed in real time, so that the response speed and the unmanned level of production management are greatly improved.

The invention provides Yb2Si2O7-BaSrAlSiO / TiO2nws composite ceramic as well as a preparation method and application of the Yb2Si2O7-BaSrAlSiO / TiO2nws composite ceramic, and solves the problems of the existing microwave absorption ceramic. The Yb2Si2O7-BaSrAlSiO / TiO2nws composite ceramic is prepared by adopting a cold pressing method according to a research and development path of introducing TiO2nws and BaSrAlSiO on the basis of Yb2Si2O7 ceramic, and the ternary ceramic, namely the Yb2Si2O7-BaSrAlSiO / TiO2nws composite ceramic, which is adjustable in dielectric constant and electromagnetic wave absorption characteristic and has different energy gaps and structural properties can be realized by changing the mass ratio of raw materials.

The invention relates to the field of glass coating production equipment, in particular to a spin coating device and method for glass coating, which comprises a control base, a machine cover is fixed above the control base, one side of the machine cover is provided with a vacuumizing pipe for vacuumizing the interior of the machine cover and an exhaust pipe for vacuumizing the interior of the machine cover, and the other side of the machine cover is provided with a vacuum pump for vacuumizing the interior of the machine cover. Through cooperation of the IR film coating mechanism, the AR film coating mechanism and the lnk spin coating mechanism, IR film coating is conducted on a wafer firstly, then AR face bottoming film coating is conducted, the light transmittance and imaging quality of a final product are further optimized, IR film coating is conducted on the wafer firstly, then AR face bottoming film coating is conducted, then lnk spin coating is conducted, and finally AR film coating is conducted. The optical performance can be improved, the film coating adhesive force can be enhanced, the technological process can be optimized, the product performance can be improved, the production efficiency can be improved, the cost can be reduced, the product reliability can be enhanced, and the probability of chromatic dispersion and high-temperature-resistant phenomena in the baking process can be reduced.

The invention discloses a steel skeleton reinforced nylon pipeline prefabricating and forming mechanism and a quality control method, and relates to the field of nylon pipelines, and the steel skeleton reinforced nylon pipeline prefabricating and forming mechanism comprises a pipeline pouring cavity used for pouring after nylon hot melting; the exterior of the steel skeleton fixing cylinder is covered with the formed net-shaped steel skeleton; the driving assembly is fixed to the inner wall of the steel framework fixing cylinder in an inserted mode and used for driving the steel framework fixing cylinder to move left and right, the driving assembly comprises a fixing plate fixed to the end of the pipeline pouring cavity, and a base is fixed to the fixing plate and the bottom of the pipeline pouring cavity; the replacing and adjusting assembly is located on one side of the driving assembly and used for replacing the steel framework fixing cylinders with different inner diameters, the replacing and adjusting assembly comprises a rotating seat, the rotating seat is fixed to the side face of the base, a plurality of placing plates are rotationally connected to the interior of the rotating seat, and the steel framework fixing cylinders with the different inner diameters are placed on the placing plates; the embedded depth of the steel skeleton net in the nylon pipeline can be conveniently controlled, and meanwhile the enhanced film thickness of the inner wall film of the pipeline can be controlled.

The invention discloses a preparation process of a cefpodoxime mother nucleus 7-AMCA, and relates to the technical field of 7-AMCA. According to the technical scheme, the method comprises the following steps: adding dimethyl carbonate and a boron trifluoride-dimethyl carbonate complex into a reaction bottle A, and dropwise adding an alkylation reagent; adding D-7ACA, and reacting at room temperature; adding purified water, sodium pyrosulfite and edetate disodium into the reaction bottle B; transferring the feed liquid in the reaction bottle B into a reaction bottle A, adding an organic solvent into the mixed liquid at room temperature, and extracting and separating the liquid to obtain a water phase; dropwise adding an alkaline solution into the water phase, adjusting the pH value to 2.8-3, and cooling to grow crystals; dropwise adding an alkaline solution, adjusting the pH value to 4.5-5.2, and cooling to grow crystals; and filtering out mother liquor, washing to be colorless, leaching by using an organic solvent, pumping, and drying in vacuum to obtain the cefpodoxime mother nucleus 7-AMCA. According to the invention, D-7ACA is taken as a starting raw material, the process flow is improved, the preparation process of 7-AMCA is optimized, and the purposes of improving the product quality and increasing the yield are achieved.

The utility model discloses a compound chute of a flotation machine, which relates to the technical field of chute separation, and comprises a flotation machine main body and a main chute, an embedded chute is arranged in the main chute, the embedded chute is used for screening foam generated by the flotation machine, and the embedded chute is fixedly connected with the main chute through a suspension rod. According to the utility model, the foam produced by the flotation machine can be subjected to mass separation, so that efficient separation and split-flow transportation of different products in a flotation unit are realized, part of qualified products in roughing operation are merged into a section of refined products through the scraper at the front end, the concentrate loss can be reduced, the recovery rate is improved, the ore pulp circulation volume is reduced, and the process flow is optimized.

The invention relates to the field of comprehensive recycling of underground brine, and particularly discloses a low-concentration lithium and boron comprehensive extraction process based on gravel-type underground brine, which comprises the following steps: S1, evaporating and concentrating the gravel-type underground brine to obtain concentrated brine; s2, the concentrated brine is subjected to dynamic adsorption through an adsorption column filled with a lithium adsorbent, lithium extraction tail liquid is obtained, then the adsorbent is desorbed, and lithium desorption liquid is obtained; s3, carrying out nanofiltration reverse osmosis on the lithium desorption solution to obtain a lithium enrichment solution; s4, the lithium extraction tail liquid is subjected to dynamic adsorption through an adsorption column filled with a boron adsorbent, boron extraction tail liquid is obtained, then the adsorbent is desorbed, and boron desorption liquid is obtained; and S5, evaporating and concentrating the boron desorption solution, and cooling to separate out a boric acid product.

The invention provides a packaging method of an SIM card packaging structure, the SIM card packaging structure comprises a strip, a plurality of SIM cards and a conductive film connecting the strip and the SIM cards, the SIM cards are DFN packaging chips, and the packaging method comprises the following steps: step 1, SMT is performed on the DFN packaging chips to the strip bonded with the conductive film; and 2, carrying out FT test to obtain the SIM card packaging structure. According to the technical scheme, the novel SIM card is formed by packaging the SIM card through the DFN packaging technology, the novel SIM card is the DFN packaging chip, the DFN packaging chip is attached to the strip through the SMT technology, and finally FT testing is carried out, the technological process is optimized, the number of procedures is reduced from existing four procedures to two procedures, material and equipment investment is reduced, production efficiency is improved by 150%, cost is reduced, and development is facilitated.

The invention discloses a size mixing and flotation method for gypsum-containing zinc oxide ore, which comprises the following steps of: grinding raw ore, sequentially adding a macromolecular calcium ion chelating agent, sodium carbonate and sodium sulfide for size mixing, and finally adding a collecting agent for flotation of zinc oxide ore to obtain zinc oxide rough concentrate. According to the method, the influence of soluble salt mineral gypsum can be overcome, the adaptability is high, the application method is simple, large-scale production management is facilitated, and efficient flotation recovery of the zinc resources can be achieved.

The invention provides an electrostatic chuck device for wafer chemical mechanical polishing, which comprises a wafer carrier and an electrostatic chuck, an adsorption surface is formed at the upper end of the wafer carrier, the electrostatic chuck is arranged at a position corresponding to the adsorption surface in the wafer carrier, and the electrostatic chuck is connected with a control module. The control module is used for controlling the electrostatic chuck to generate static electricity, so that the wafer is adsorbed on the adsorption surface, and chemical mechanical polishing operation is facilitated; therefore, the electrostatic chuck device for chemical mechanical polishing of the wafer can stably suck the wafer without being influenced by the thickness of the wafer, so that the yield is improved, the technological process is improved, a better thinning effect is achieved, the time and the cost of a gluing and film coating procedure for enhancing the strength of the wafer are saved, the procedures of degumming and film removing are eliminated, and the production efficiency is improved. And compared with an existing vacuum suction mode, the time and the cost for frequent maintenance are saved, and the overall implementation and use are more practical.

The invention provides a high-sulfur petroleum coke-based sulfur self-doped mesoporous carbon loaded Fe-TM bimetallic alloy catalyst as well as a preparation method and application of the high-sulfur petroleum coke-based sulfur self-doped mesoporous carbon loaded Fe-TM bimetallic alloy catalyst. The high-sulfur petroleum coke-based sulfur self-doped mesoporous carbon loaded Fe-TM bimetallic alloy catalyst provided by the invention is a sulfur self-doped mesoporous carbon loaded Fe-TM solid solution alloy material formed by calcining high-sulfur petroleum coke under an inert atmosphere under activation of potassium ferrate and performing reduction calcination under a hydrogen atmosphere. According to the high-sulfur petroleum coke-based sulfur self-doped mesoporous carbon loaded Fe-TM bimetallic alloy catalyst provided by the invention, the peak dehydrogenation temperature of a magnesium-based material can be remarkably reduced by 80-110 K, the catalytic effect is equivalent to that of a catalyst prepared by a traditional route, but the cost benefit and the environmental protection advantage of the catalyst are remarkable, and huge industrial application potential of high-sulfur coke in the field of hydrogen storage is shown.

The invention relates to the technical field of driving motors, in particular to a rotor assembling mechanism and method of a direct-drive motor, the rotor assembling mechanism comprises a workbench, a rotating disc assembly, a magnet yoke assembling assembly and a magnetic shoe assembling assembly, the rotating disc assembly is provided with a positioning jig, the positioning jig is used for fixing a rotor shell, and the magnetic shoe assembling assembly is arranged on the workbench. The turntable assembly is used for driving the positioning jig to rotate so as to drive the rotor shell to rotate; the magnet yoke assembling assembly comprises a magnet yoke feeding disc, a magnet yoke taking supporting frame, a magnet yoke taking transmission module, a magnet yoke grabbing module and a magnet yoke press-fitting module. Through reasonable layout and cooperation of the workbench, the rotating disc assembly, the magnet yoke assembly assembly and the magnetic shoe assembly assembly, technological process optimization of whole rotor assembly is achieved, and the production efficiency and the assembly quality are improved.

The present invention discloses a method for lengthening a beam in the air, a beam, and a crane, wherein the method for lengthening a beam in the air comprises the following steps: S1, cutting the beam, cutting the beam along the cutting line into a beam front section and a cantilever section; S2, forming a lengthened cantilever section, welding the lengthened section and the cantilever section into a lengthened cantilever section; S3, installing the lengthened cantilever section, installing the lengthened cantilever section on the beam front section to form a lengthened beam; S4, installing the lengthened beam, replacing the front row of tie rods of the beam, and installing the lengthened beam on a crane. The present invention also discloses a beam and a crane, wherein the beam is the lengthened beam formed by the above method, and the crane is a crane including the lengthened beam. The method for lengthening a beam in the air, the beam, and the crane of the present invention do not need to use a large crawler crane or disassemble the beam, wire rope, etc. during the lengthening process of the beam, thereby solving the problems of high transformation cost, long time consumption, and large site occupation.

The invention relates to the technical field of processing of protective materials, and discloses processing equipment for aramid nano metallization comfortable protective materials, which comprises a processing box, filtering treatment equipment and a suction fan, the filtering treatment equipment is fixedly connected to the top of the processing box, and the suction fan is fixedly connected to the interior of the filtering treatment equipment. Inlets and outlets are formed in the two sides of the processing box, and the multiple auxiliary assemblies are used for removing impurities and moisture in aramid fibers in a multiple mode so that metal deposition can be more uniform; the aramid fibers moving in the middle are turned and flapped synchronously through the two flapping steel meshes II and the flapping steel mesh I, so that chippings and dust in the aramid fibers can be effectively flapped out, and the effect of removing the chippings and dust in the aramid fibers is improved; and the flapped fiber chippings and dust are adsorbed and collected under the electrostatic action of an electrostatic collection plate, and the situation that the fiber chippings and dust influence the aramid fiber removal effect in the processing box is reduced.

The lead-zinc ore flotation method comprises the following steps that raw ore is ground to be fine, after a sulfur inhibitor, a zinc inhibitor, a lead collecting agent, a lead flocculating agent and a foaming agent are sequentially added, lead concentrate is obtained through flotation, after the sulfur inhibitor, a zinc activating agent, the zinc collecting agent and the foaming agent are sequentially added into lead flotation tailings, the lead concentrate is obtained through flotation; and zinc concentrate is obtained through flotation. According to the method, the technological process is simple and convenient, industrial production is easy, the adaptability to ore grinding products containing the micro-fine-particle galena is high, the flotation recovery rate of the micro-fine-particle galena can be increased, the quality of zinc concentrate is guaranteed, and better lead-zinc flotation indexes are obtained.

This invention discloses a method for preparing aviation fuel with different functional components based on the directional dismantling of organic waste molecular structure, belonging to the field of organic waste recycling. The method uses waste plastics, waste rubber, and waste oils as raw materials, employing a vertically connected two-stage reactor. Multiple types of mixed organic waste are co-pyrolyzed in the first-stage reactor, and the pyrolysis volatilization products directly enter the second-stage reactor for gaseous catalytic hydrogenation, ultimately yielding a mixed aviation liquid fuel containing different functional components. This method utilizes the molecular structure of organic waste itself to prepare liquid fuel products such as isoalkanes and aromatics, replacing the isomerization and aromatization reactions in existing catalytic processes. It has advantages such as a simple process flow and simple catalytic reaction, and can quantitatively prepare mixed aviation fuel composed of two or more functional components from n-alkanes, isoalkanes, aromatics, and cycloalkanes according to actual applications.

The invention discloses a piezoelectric heterogeneous substrate, a preparation method and a semiconductor device, the piezoelectric heterogeneous substrate comprises a substrate layer, a dielectric layer, a patterned electrode layer and a piezoelectric film layer, the dielectric layer is located between the substrate layer and the piezoelectric film layer, the patterned electrode layer is located in the dielectric layer, and one side of the patterned electrode layer is exposed to the dielectric layer and is electrically connected with the piezoelectric film layer; the piezoelectric thin film layer is provided with a first surface and a second surface which are deviated from each other, the first surface is an original exposed surface of the piezoelectric heterogeneous substrate for forming the piezoelectric thin film layer, the first surface is positioned on one side, deviated from the substrate layer, of the piezoelectric thin film layer, and the second surface is formed by thinning one side, deviated from the original exposed surface, of the piezoelectric wafer substrate. The sacrificial protection structure is adopted to form the piezoelectric thin film layer, a high-temperature process is completed before the patterned electrode layer and the dielectric layer are formed, stress caused by thermal mismatch in the subsequent preparation process is reduced, and the morphology accuracy, reliability, stability and durability of the piezoelectric heterogeneous substrate are improved.

The invention discloses a defect-rich ordered mesoporous carbon supported metal nanoparticle catalyst as well as preparation and application thereof, and belongs to the field of catalysts. Wherein the defect-rich ordered mesoporous carbon is constructed by co-pouring a hard template into a mixed solution obtained by mixing a carbon source and a defect-causing agent and dehydrating, and then carbonizing and removing the hard template to obtain the defect-rich ordered mesoporous carbon carrier; then, the defect-rich ordered mesoporous carbon loaded metal-based catalyst is obtained through the steps of dipping in a metal precursor solution and chemical reduction. Importantly, according to the defect-rich ordered mesoporous carbon carrier prepared by the method, the inherent defect density and type can be easily regulated and controlled by changing the adding amount and type of the defect-causing agent. The metal nanoparticle catalyst loaded by the defect-rich ordered mesoporous carbon shows excellent activity and improved stability as a methanol electrocatalytic oxidation catalyst carrier, and has good application value in the field of methanol energy conversion.

The application discloses a kind of two-dimensional organic material based on porphyrin unit and its preparation method and application, the two-dimensional organic material is formed by the supramolecular interaction of protonated 5,10,15,20-tetra (4-aminophenyl) porphyrin and pyromellitic acid self-assembly.It does not need to add surfactant in its preparation process, only by reducing the precursor concentration and appropriately increasing the pH value of pure water phase regulation, by low concentration limited self-assembly, directly obtain the dispersion stable two-dimensional ultrathin nanosheet.The material takes porphyrin unit as light active center and specific adsorption site, in the complex composition of electronic waste leaching solution, without additional electron sacrificial agent, by material itself consumption photogenerated hole, under visible light driving, complete the selective enrichment and in-situ reduction of tetrachloroaurate anion, generate elemental gold.The application process is simple and environmental protection, with good application prospect.

The invention discloses a method for manufacturing and separating a pressure sensor, and relates to the technical field of silicon wafer sensors, the pressure sensor comprises a silicon substrate and a silicon wafer, and the method specifically comprises the following steps: 1) bonding the silicon substrate and the silicon wafer under the protection of silicon oxide to form a new silicon wafer; 2) polishing the new silicon wafer to a required thickness to form a top silicon layer; 3) manufacturing a piezoresistor, a dielectric layer and a metal lead on the top silicon layer; 4) etching a pattern of the sensor on the top silicon layer; 5) photoetching, patterning and hardening the whole top silicon layer; and 6) stripping the pattern of the sensor from the top silicon layer, and cleaning the surface to obtain the sensor chip. In order to solve the problems that a product is designed into a hollow structure, is easy to break and is not easy to sort, the invention provides a manufacturing process method of a pressure sensor which is low in cost, high in reaction sensitivity and easy to operate, transport and store.