159 results about "Platinum Metal" patented technology

The invention provides a method for measuring a sample hole, and relates to the technical field of semiconductors, and the method comprises the steps: marking a first target surface of a to-be-measured sample, and determining the region range of a target hole of the to-be-measured sample located in the to-be-measured sample through the first target surface; coating the first target surface of the to-be-detected sample to form a glue protective layer; depositing metal on the glue protection layer to form a metal protection layer; the material of the glue protection layer comprises M-Bond 610, and the material of the metal protection layer comprises metal platinum; the thickness of the glue protection layer is 500 nm to 1 [mu] m, and the thickness of the metal protection layer is 300 nm to 600 nm; etching along the second target surface of the to-be-tested sample until the target hole is exposed; sampling the to-be-tested sample with the exposed target hole to obtain a sample piece with the target hole; detecting a target hole; after the first target surface of the to-be-detected sample is coated to form the glue protection layer, the method further comprises the following steps: performing vacuum pumping to remove gas in the target hole.

The invention discloses a film platinum resistor temperature sensor, which comprises an aluminum oxide insulating substrate, a titanium film, a platinum film resistor layer, a protective layer, a platinum metal lead and encapsulating slurry, the titanium thin film is deposited on the surface of the aluminum oxide insulating substrate, the platinum thin film resistance layer is deposited on the surface of the titanium thin film, the protection layer is deposited on the surface of the platinum thin film resistance layer, the platinum metal lead is welded on a bonding pad on the platinum thin film resistance layer, and the packaging slurry is coated on the protection layer and the platinum thin film resistance layer. According to the invention, the platinum film temperature sensor with high precision, good consistency, wide temperature measurement range and strong stability is obtained through arrangement and allocation of a multi-layer structure.

The application provides an alloying modification method of a platinum catalyst, relates to the field of electrochemical catalysis, and particularly relates to the following steps: mixing 5% of a platinum carbon catalyst and a phytic acid solution uniformly, performing freeze-drying treatment, performing one-time pyrolysis, sulfuric acid treatment, and ultra-pure water cleaning and suction filtration, and drying to obtain a powder; adding ferrous sulfate and 1,10-phenanthroline, performing second-time pyrolysis, sulfuric acid treatment, and ultra-pure water cleaning and suction filtration, and drying to obtain an alloying modification carbon-based catalyst. The method is alloyed by the metal platinum and a transition metal, effectively improves the activity and stability of the catalyst, reduces the use amount of the noble metal platinum, and effectively reduces the manufacturing cost of the catalyst; and the alloying modification carbon-based catalyst obtained by the method can be used for the preparation of a primary zinc-air battery, a rechargeable zinc-air battery and the like.

The application belongs to the technical field of luminescent materials, and particularly relates to a binuclear platinum complex and application thereof. The binuclear platinum complex has the structure shown in formula (1), and when used in an OLED, especially in a blue light emitting region, the binuclear platinum complex exhibits enhanced phosphorescence quantum yield, good luminescence stability, high luminescence efficiency, and is suitable for use as an emitter material in OLED application. The metal platinum complex of the application can obtain an organic electroluminescent device with deep blue phosphorescence and improved luminescence efficiency, and the luminescent device has good thermal stability. The binuclear platinum complex has the advantages of narrow emission spectrum, high stability and high efficiency by adjusting the structure of the ligand around the metal center and the structure of the substituent on the ligand to control the photophysical properties, and has wide application prospects in many fields such as OLED display and lighting.

The device comprises an electrolytic tank and a positive electrode tank, a tank opening of the electrolytic tank faces upwards, an inlet pipe and a discharge pipe are arranged on the left side edge and the right side edge of the electrolytic tank correspondingly, a cathode piece is arranged in the electrolytic tank, and a first communicating tank is formed in the front end in the electrolytic tank; a communicating tank II is arranged on one side, close to the electrolytic tank, of the positive electrode tank, an exchange membrane is arranged between the communicating tank I and the communicating tank II, an exhaust pipe is arranged at the top of the positive electrode tank, a platinum metal electrode is arranged in the positive electrode tank, and a receiving end is arranged at the top of the platinum metal electrode; according to the invention, the electrolytic tank, the positive electrode tank, the solar power supply unit and the gas supply unit are matched, so that CO2 can be efficiently captured from low-concentration CO2 gas (such as air), and the captured CO2 is subjected to a co-electrolysis reaction by utilizing electrolyte to generate carbon monoxide and hydrogen by utilizing an electrochemical reaction of solar power supply, so that the synergistic interaction of CO2 emission reduction and recycling is realized.

The application relates to the technical field of platinum catalysts, and particularly discloses an anti-yellowing platinum catalyst capable of prolonging the curing time and a preparation method thereof. The platinum catalyst comprises a platinum metal compound, an alkenyl-containing siloxane compound, an alkaline metal salt, an organic solvent and a catalyst carrier; wherein the mass ratio of the platinum metal compound, the alkenyl-containing siloxane compound, the alkaline metal salt and the organic solvent is 1:(8-20):(1.2-3):(6-20). The platinum catalyst has the advantages of being capable of prolonging the curing time and having the anti-yellowing performance, and has a wide application scenario.

This invention discloses a method for preparing a Pt / C catalyst by vacuum impregnation with an ionic liquid and its application. First, a carbon support is mixed with water and alcohol, ball-milled, and then mixed with nitric acid to obtain an acid-treated carbon support. Next, a precursor solution is prepared by mixing a platinum salt, an organic solvent, a surfactant, and water, and then an imidazole ionic liquid is added to it in portions to obtain a precursor solution containing the ionic liquid. This solution is mixed with the acid-treated carbon support and vacuum ball-milled to obtain a mixed slurry. This slurry is then vacuum freeze-dried to obtain a freeze-dried powder. Reduction and heat treatment are then performed to obtain the ionic liquid-doped Pt / C catalyst. The catalyst is then coated onto both sides of a proton exchange membrane to form a catalytic layer. Through this method, this invention not only effectively inhibits the aggregation, migration, and ripening of platinum particles during electrochemical processes, thereby significantly improving the catalyst's durability, but also enhances the catalyst's proton conductivity under low humidity conditions.

The invention relates to the technical field of catalyst recovery, and discloses a method for recovering platinum from a titanium-zirconium composite oxide platinum-loaded waste catalyst, which comprises the following steps: (1) roasting the platinum-loaded waste catalyst which takes TiO2-ZrO2 as a carrier, and crushing and grinding; (2) uniformly mixing the ground waste catalyst with disulfate, and carrying out roasting reaction to obtain a melt I; stirring and dissolving the melt I and an acid solution, and filtering to obtain filtrate and a filter cake I; (3) repeating the reaction in the step (2) on the filter cake I to obtain a filter cake II; (4) oxidizing and dissolving the filter cake II with hydrochloric acid and an oxidizing agent to obtain a platinum-containing solution; and (5) separating and purifying the platinum-containing solution to obtain metal platinum. According to the method, the carrier in the waste catalyst is decomposed by adopting the disulfate, and then the waste catalyst is oxidized and dissolved by adopting the hydrochloric acid and the oxidizing agent, so that the platinum recovery cost is reduced, the environmental pollution is reduced, the production efficiency is improved, and the cyclic utilization of resources is facilitated.

The application provides a cracking catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: preparing seeds by controlling pH value and a two-stage crystallization process, taking a molecular sieve material as raw material, and preparing a mother liquor by dissolving aluminum and silicon treatment and mixing of the two by adjusting the proportion of each raw material, then through aging treatment and hydrothermal crystallization treatment, a 13X molecular sieve with a high silicon to aluminum ratio, a high specific surface area and a high pore volume and a multi-level pore structure is prepared; the 13X molecular sieve is immersed in a carbon precursor solution for carbon modification treatment, immersed in a platinum precursor solution for treatment, pre-baked in an inert gas atmosphere, and calcined in an air atmosphere, so that platinum is combined with the framework of the 13X molecular sieve in the form of highly dispersed platinum metal oxide and platinum metal, forming a platinum-containing 13X molecular sieve cracking catalyst with stable structure and high catalytic activity, and the problems of low stability of the cracking catalyst in the prior art and lack of resource utilization of molecular sieve waste in the preparation process are solved.

The invention discloses a preparation method of a PtAl coating. The preparation method of the PtAl coating comprises the following steps that platinum is electroplated on the surface of a base body, heat treatment is conducted under the vacuum condition, and a platinum metal layer is prepared; and gas phase aluminizing is conducted on the surface of the side, away from the base body, of the platinum metal layer, after gas phase aluminizing is finished, furnace cooling is conducted to 600-800 DEG C, the platinum metal layer is placed in the air environment to be cooled, and the PtAl coating is prepared. According to the provided preparation method of the PtAl coating, after gas-phase aluminizing is finished, furnace cooling is conducted to 600-800 DEG C, the PtAl coating is placed in an air environment to be cooled, pre-oxidation is conducted in the aluminizing process, a pre-oxidation film of alpha aluminum oxide is formed on the surface of the coating, and the service life of an oxidation film of a base body is prolonged.

The present invention belongs to the field of organic electroluminescence, and specifically relates to a tetradentate cyclometalated platinum (II) complex guest phosphorescent material based on a 2,3',5'-substituted 1,1'-biphenyl structure and the use thereof. In the present invention, by introducing alkyl or aryl to the positions 2, 3' and 5' of 1,1'-biphenyl to increase the steric hindrance, red shift or luminescence quenching caused by molecular aggregation can be avoided. Deuteration at the periphery of a cyclometalating ligand can improve the stability of the material, so that the phosphorescent material provided by the present invention has good chemical stability and thermal stability and can be easily used for manufacturing evaporation-type OLED devices. Organic electroluminescent devices manufactured by using the complex of the present invention as a light-emitting layer material have significant improvement in both current efficiency and service lifetime, thereby achieving great application prospects in the fields of OLED display and illumination.

The present invention relates to the field of organic electroluminescent material preparation technology, and particularly, to a fluorenocarbazole tetradentate platinum(II) complex, an organic light-emitting diode material, a device, and an apparatus. By means of introducing a fluorene ring system at the 3,4-position of carbazole and introducing a substituent at the ortho-position of the benzene ring at the upper left, a novel tetradentate platinum(II) complex-based blue phosphorescent material is obtained. The proportion of components of the localized state (3LE) is increased in the excited triplet state of the cyclic tetradentate platinum(II) complex, thereby achieving a low shoulder peak, improved emission color purity of material molecules, and enhanced stability of materials. The provided materials all have good chemical stability and thermal stability, thereby facilitating the preparation of evaporation-type OLED devices. The organic electroluminescent device manufactured using the above-described compound as the light-emitting layer has a significant improvement in both the blue light index (BI) and service life, and can also reduce the turn-on voltage.

This invention relates to a novel honeycomb activated carbon for adsorption-desorption catalytic combustion processes, belonging to the field of activated carbon technology. The novel honeycomb activated carbon comprises the following raw materials: a composite matrix, a composite activator, cobalt nitrate hexahydrate, zirconium oxynitrate hydrate, platinum nitrate, polyvinylpyrrolidone, and hexadecylamine. This invention uses beet pulp, enoki mushroom residue, and king oyster mushroom residue as the composite matrix to provide a large number of hydroxyl groups. Potassium bicarbonate and triammonium phosphate are used as the composite activator to dehydrate, condense, and interconnect the numerous hydroxyl groups on the composite matrix, effectively increasing the pore structure of the system and providing a large number of adsorption sites, facilitating the adsorption and mass transfer of VOCs. Simultaneously, the introduction of cobalt, zirconium, and platinum metal elements significantly improves the catalytic combustion performance of the system for VOCs. The addition of polyvinylpyrrolidone and hexadecylamine further enhances the catalytic combustion performance of the system.

The invention belongs to the technical field of preparation of organic electroluminescent materials, and particularly relates to a tetradentate ring metal platinum (II) complex, an electronic device and application of the tetradentate ring metal platinum (II) complex. The invention provides a tetradentate platinum (II) complex obtained by introducing 2, 6-diisopropyl phenyl to different positions of carbazole, and the complex has a structure as shown in a formula (I). The introduction of 2, 6-diisopropyl phenyl reduces the interaction between molecules, the group has good solubility, so that the platinum complex has good spin-coating performance, and the provided compound has good chemical stability, can improve and balance the transport of holes and electrons, enables the energy transmission between a subject and an object to be more efficient, and has a good application prospect. Specifically, the compound or the composition provided by the invention is used for improving the current efficiency and prolonging the service life of the organic light-emitting device, and has a great application prospect in the fields of OLED display and illumination.

The invention provides a precious metal platinum-doped nano zinc oxide photocatalyst, a preparation method and application, and relates to the technical field of catalyst synthesis. The method specifically comprises the following steps: pretreating a natural biological material with a hierarchical porous structure as a soft template, and freeze-drying to obtain a Zn < 2 + > supported biological template; placing the template in a mixed solvent, performing microwave hydrothermal synthesis to obtain a ZnO (at) biological template, and performing centrifugal washing; preparing a doping solution containing noble metal ions, dissolving the ZnO (at) biological template in the doping solution containing noble metal ions, and irradiating under ultraviolet light; calcining in an air atmosphere, and then immersing a product into a citric acid solution to obtain the catalyst. By combining a natural biological template with microwave-assisted hydrothermal and in-situ photochemical reduction technologies, uniform doping of ultralow noble metals (Pt, Pd, Au and the like) in a ZnO hierarchical porous structure is realized, and material morphology regulation and control and active site construction are synchronously completed.

The application discloses a composite catalyst for low-temperature catalysis of organic pollutants and a preparation method and application thereof. The catalyst is prepared by taking TiO2 as a carrier, a copper-manganese-cerium composite oxide and a loaded noble metal platinum as active components of the catalyst; the weight percentage of the copper-manganese-cerium composite oxide is 10%, the weight percentage of the TiO2 carrier is 80%-90%, and the weight percentage of the noble metal platinum is 0.1%-1%; in the copper-manganese-cerium composite oxide, the molar ratio of copper, manganese and cerium is 1:(3-4):(0.5-1). The material is synthesized by adjusting the proportion of tetrabutyl titanate, glacial acetic acid and ethanol through a sol-gel method to obtain TiO2 with an ordered mesoporous structure, and the loaded noble metal platinum and copper-manganese-cerium metal oxide enable the material to have excellent low-temperature catalytic performance, a significantly improved organic pollutant removal efficiency, a greatly reduced production cost, and good adaptability to large-scale production and industrial application prospects.

The invention provides a platinum metal complex as well as a preparation method and application thereof in an organic electroluminescent device, the metal complex has a structure shown in a general formula I. An adamantane structural unit is introduced to the Pt metal complex to form a Pt ligand, so that the effects of preventing close packing and exciton dispersion among molecules are achieved; therefore, aggregation quenching of triplet excitons is reduced, and the efficiency and the service life of the organic electroluminescent device are improved.

The present invention relates to the technical field of organic electroluminescent material preparation, and specifically relates to a tetradentate cyclometalated platinum(II) complex phosphorescent guest material having a biphenyl structure, an electronic device, an apparatus, and a use thereof. In the present invention, steric hindrance is increased by introducing an alkyl group or an aryl group at the 3'-, 4-, and 5'-positions of 1,1'-biphenyl, which prevents molecular aggregation-induced red shift or luminescence quenching; deuteration at the periphery of the cyclometalated ligands can improve the stability of the material, allowing the phosphorescent material of the present invention to exhibit good chemical stability and thermal stability, facilitating the fabrication of vacuum-deposited OLED devices. Organic electroluminescent devices manufactured by using the complex of the present invention as an emitting layer material have significant improvement in current efficiency and lifetime, and have great application prospects in the fields of OLED display and illumination.

The present invention provides a metal platinum (II) and palladium (II) complex, an organic light-emitting device and a display or lighting apparatus, wherein a structure of the metal platinum (II) and palladium (II) complex is as shown in the following formula (I). A cyclometalated platinum (II) and palladium (II) complex based on a tetradentate ligand according to the present invention contains molecules having relatively strong rigidity, can effectively inhibit non-radiative transition generated by molecular vibration, and has relatively high quantum efficiency and luminous intensity. Meanwhile, a tetradentate phosphorescent metal complex of the present invention is a novel parent nucleus structure, which may be developed into a series of efficient phosphorescent metal platinum complexes. The present invention has excellent application prospects in the fields of OLED display and lighting and the like, especially in the field of light-emitting layer materials.

The invention belongs to the technical field of precious metal treatment, and particularly discloses a method for recovering platinum from hydrosilylation waste catalyst liquid, which comprises the following steps: S1, carrying out photocatalytic oxidation pretreatment on the waste catalyst liquid; s2, carrying out double-liquid extraction on the pretreated waste liquid by using an ionic liquid, and selectively extracting platinum ions to enter an ionic liquid phase; s3, a stripping agent is used for stripping platinum ions from the ionic liquid phase, and a platinum-containing aqueous solution is obtained; and S4, the platinum-containing aqueous solution obtained after reverse extraction is subjected to reduction treatment, and platinum ions are reduced into metal platinum powder. Photocatalytic oxidation pretreatment avoids the problem that too many impurities are introduced in traditional chemical oxidation, interference of other metal ions is reduced through high-selectivity extraction of ionic liquid, and the separation purity and extraction efficiency of platinum are improved; the steps of reverse extraction and reduction achieve efficient recovery of platinum, the resource utilization rate of platinum in the waste catalyst liquid is increased, the environmental pollution risk in the precious metal recovery process is reduced, and economic and environment-friendly benefits are both achieved.

The invention relates to the technical field of precious metal regeneration, and discloses a platinum waste AI sorting and cyclic regeneration management system. A waste pretreatment unit of the system is used for receiving platinum-containing waste, carrying out physical crushing and outputting waste particle flow with standardized particle size; the AI sorting unit is connected with the waste pretreatment unit to obtain spectral characteristic data of waste particles, a platinum element distribution rule is recognized through a deep learning model, and a platinum-containing particle coordinate set is output; the cyclic regeneration unit receives the platinum-containing particle coordinate set, controls a mechanical arm to grab target particles for high-temperature smelting, separates platinum metal from other impurity components, and outputs a platinum metal melt; and the regeneration verification unit monitors the purity parameter of the platinum metal melt, triggers an impurity separation instruction when the purity does not reach the standard, and feeds back the impurity separation instruction to the cyclic regeneration unit to re-execute the smelting operation. According to the system, through cooperative operation of all the units, full-process intelligent management of the platinum waste from pretreatment and precise sorting to cyclic regeneration and quality verification is achieved.

A kind of plating platinum metal film capillary, gas raman spectrum detection system and use method, plating platinum metal film capillary includes silica capillary and plating film, the length of silica capillary is 5 to 20 centimeters, inner diameter is 0.5 to 2 millimeters, the inner wall, outer wall and both side end face of silica capillary are evenly plated with plating film, plating film is mirror surface platinum film, in the gas raman spectrum detection system based on plating platinum metal film capillary, laser is processed after passing through precision grinding lens, optical fiber collimating coupler, narrow band filter, long focus best shape lens, dichroic filter, pinhole plate, and enters plating platinum metal film capillary, and Raman signal is generated by two interactions with gas in plating platinum metal film capillary by the reflection of second reflector.This design not only can carry out raman spectrum detection to the gas of strong corrosivity or / and strong oxidizability, but also can reflect Raman signal multiple times, effectively improves the collection rate and durability of system's Raman signal.

The present invention relates to a catalyst. The catalyst comprises a nitrogen-doped carbon-based carrier loaded with platinum metal particles existing in the form of a zero-valent element, wherein the doping nitrogen comprises more than 40% to 80% of nitrogen atoms simultaneously connected to three carbon atoms via chemical bonds, and 0% to 1% of nitrogen atoms connected to oxygen atoms via chemical bonds; and on the basis of the total weight of the catalyst, the catalyst comprises 0.1 wt.% to 2 wt.% of the doping nitrogen, and 0.1 wt.% to 1.5 wt.% of the platinum metal particles. The present invention further relates to a preparation method for the catalyst and the use of the catalyst in a dehydrogenation reaction. The catalyst of the present invention has a good dehydrogenation activity and a low hydrogenolysis activity.

The application relates to the field of daily chemical personal care, in particular to a hydrophilic modified organic silicone elastomer with moisturizing performance and a preparation method thereof, which comprises the following components: a polysiloxane containing at least three Si-H units in the molecule; a divinyl-terminated polysiloxane; a hyaluronic acid-modified monovinyl polysiloxane; a polyethylene glycol-modified vinyl polysiloxane; a carrier fluid; and a platinum metal catalyst for silicon hydrogen addition. The organic silicone elastomer is hydrophilically modified by introducing hyaluronic acid fragments and polyethylene glycol segments, the moisturizing performance of the organic silicone elastomer is improved, the organic silicone elastomer can effectively enhance the moisturizing feeling of skin in cosmetic application, and dryness and tightness are reduced. The modified elastomer has good self-emulsifying properties, can easily form a stable gel system in a water-based or water-containing formula, simplifies the emulsification process, and improves the applicability and stability of the formula.

This invention relates to the field of fine chemical technology, and discloses an alloy catalyst, its preparation method, and its application. The preparation method of the alloy catalyst of this invention includes: S1, dispersing a copper source, a platinum source, and an anchoring agent in a solvent, and then adding a reducing agent; S2, dispersing the pretreated support in the solution obtained in step S1 for loading; S3, drying the loaded support obtained in step S2 to obtain the alloy catalyst; the anchoring agent is used to anchor copper and platinum onto the support. The alloy catalyst of this invention uses a copper source, a platinum source, and an anchoring agent as raw materials. The anchoring agent loads copper and platinum metal particles onto the support, effectively preventing the detachment and loss of copper and platinum metals. The alloy catalyst is used to catalyze the synthesis of the antioxidant 6PPD, effectively inhibiting the ketone-to-alcohol side reaction and improving catalytic efficiency.

The present invention belongs to the technical field of the preparation of organic electroluminescent materials, and specifically relates to a tetradentate cyclometalated platinum (II) complex based on a 4-carbazolyl carbene structure, an electronic device and apparatus, and the use thereof. In the present invention, the steric hindrance of material molecules can be increased by introducing a 4-carbazolyl group having large steric hindrance at a carbene site, such that molecular aggregation can be avoided, and intermolecular interaction and luminescence quenching can be inhibited, which are beneficial for improving the luminescence efficiency and the color purity. The present invention has significant application prospects in the fields of OLED display and illumination.

The invention belongs to the field of organic electroluminescence, and particularly relates to a fused-ring carbazole tetradentate metal platinum (II) complex, an organic light-emitting diode material, an organic light-emitting diode device and an organic light-emitting device. A heterocyclic structure is introduced to the 3, 4-position of carbazole and a substituent group is introduced to the ortho-position of a benzene ring at the upper left corner, and the excited state property of molecules is cooperatively regulated, so that the novel narrow-band tetradentate metal platinum (II) complex blue-light phosphorescent material is obtained. The material provided by the invention has excellent chemical stability and thermal stability, and is easy to prepare an evaporation type OLED (Organic Light Emitting Diode) device. The efficiency and the service life of an organic electroluminescent device manufactured by using the compound as a luminescent layer are obviously improved, and meanwhile, the lightening voltage is effectively reduced.

The invention relates to the technical field of biological medicine, and discloses an activated cis-platinum reversible coordination complex, coordination nano-micelles thereof and application of the activated cis-platinum reversible coordination complex and the coordination nano-micelles. The activated cis-platinum reversible coordination complex is a complex formed by a coordination material and a metal platinum drug or an activated molecule thereof or a derivative thereof, and the coordination ratio of a coordination group in the coordination material to the metal platinum drug or the activated molecule thereof or the derivative thereof is less than or equal to 2: 1; the coordination material is a coordination phospholipid-like material or a coordination polymer material; the metal platinum medicine or the activated molecule or the derivative thereof is cis-platinum, carboplatin, lobaplatin, epithiaplatin, nedaplatin, oxaliplatin or the activated molecule or the derivative thereof. According to the activated cisplatin reversible coordination complex and the coordination nano-micelle and application thereof, the coordination nano-micelle not only can realize cisplatin controlled release regulated by iron ions, but also can reduce ferroptosis of renal tubular cells and related renal cells by chelating the iron ions, so that the renal toxicity of the cisplatin is efficiently inhibited, and the application value is wide.

The invention discloses a manufacturing method for forming nickel-platinum silicide for improving Schottky electric leakage uniformity of a groove. The manufacturing method comprises the following steps: step 1, loading a groove gate structure wafer sputtered with nickel-platinum metal into a wafer boat of an alloy furnace tube; 2, pushing the wafer boat into a constant-temperature alloy furnace tube at a relatively low speed, and doping nickel and platinum metals on the surface of the silicon substrate in the moving process; step 3, doping the nickel-platinum alloy into the silicon substrate in a constant-temperature furnace tube through a high-temperature process for a certain time to form silicide; 4, pushing the crystal boat out of the furnace tube at a low speed after the alloying time is finished; 5, taking out the wafer of the wafer boat within a certain time range; the difference value between the furnace feeding speed of the wafer boat in the step 2 and the furnace discharging speed of the wafer boat in the step 4 is not greater than 5mm / min. The temperature and time in the alloying process are controlled by controlling the speed of entering and exiting from the furnace, so that the uniformity of electric leakage parameters of products is ensured, the product yield is improved, and the production cost is reduced.

The invention relates to the technical field of membrane separation, and discloses a multi-stage membrane separation coupling photocatalytic oxidation system and application thereof.The multi-stage membrane comprises a composite membrane base material, a microporous polymer layer and an ultrathin polyamide layer, and the composite membrane base material is prepared from, by mass, 15-20 parts of polyvinylidene fluoride, 2-6 parts of polyvinylpyrrolidone, 1-3 parts of N, N-dimethylformamide, 1-3 parts of a coupling agent, 1-3 parts of a coupling agent and 1-3 parts of a coupling agent; the oxidation system comprises a sedimentation tank, a sewage treatment tank, an ultraviolet lamp, a multi-stage membrane and an effluent buffer tank. In the photocatalytic oxidation stage, a TiO2 nanotube array loaded with precious metal platinum (Pt) is innovatively selected as a catalyst, and different from a traditional TiO2 photocatalyst, the composite material not only improves the photocatalytic efficiency, but also enhances the stability of the catalyst, and the improvement can significantly improve the degradation capacity of refractory organics, so that the photocatalytic performance of the composite material is improved. Particularly, the removal efficiency of pollutants such as antibiotics and endocrine disruptors in water is outstanding.