4094 results about "Air atmosphere" patented technology

A storage apparatus for objects in the manufacture of substrates, in particular of substrates for electronic components, is provided with a housing which forms at least one closed area for storage of the objects. The storage apparatus also has a pure air device by which a pure air atmosphere can be produced at least within a section of the housing. Using at least one input / output device for the storage apparatus, objects can be passed into the interior of the housing or removed from the interior, in which case the objects can be handled by at least one handling device in the interior of the housing, and object receptacles are provided within the housing, in which objects can be temporarily stored outside transport containers. In order to require a position area which is as small as possible for a storage apparatus such as this, despite it having a high storage capacity, the invention provides that two areas which are arranged at least partially one above the other are formed in the same housing of the storage apparatus, with a first area for an object storage device, and a second area for a transport container storage device.

A cooling apparatus for a fired body includes a transporting member for transporting a firing jig in which a ceramic fired body is housed; a plurality of blowers for cooling the ceramic fired body; and a suction mechanism for changing the atmosphere inside the firing jig from an inert gas atmosphere to an air atmosphere.

The invention discloses a polydopamine-based biofunction modification method. The method comprises the following steps of: soaking clean inorganic / metal materials in dopamine alkaline aqueous solution with a pH value of 7.2 to 10, introducing oxygen to fully oxidize the clean inorganic / metal materials to obtain a monolayer polydopamine modification layer, drying, placing the material in the air atmosphere at 50 to 200 DEG C, performing thermal oxidation to obtain a multi-layer firmly-combined high-reactivity polydopamine layer, and soaking the treated material into the amino-containing and sulfydryl-containing biofunctional molecular solution to obtain a firmly combined biofunction simulate modification layer on the surface of the materials. The polydopamine modification layer obtained bythe method has excellent anti-deformation performance, stability and reactivity, can directly react with amino or the sulfydryl in the biomolecule to immobilize the bioactive molecule on the surface by covalent bonds; moreover, the process is simple, the condition is mild, and the method is easy to implement.

A preparation method of a polyhedral cobalt phosphide catalyst for hydrogen production through water electrolysis comprises steps as follows: Co(NO3)2*6H2O and 2-methylimidazole are dissolved in methanol respectively, a 2-methylimidazole solution is poured into a Co(NO3)2 solution, the mixture is stirred and then aged at the room temperature, a product is centrifugally separated, vacuum drying is performed after washing with methanol, and a polyhedral metal organic frame ZIF-67 is obtained; then the polyhedral metal organic frame ZIF-67 is placed in a tube furnace, cobaltosic oxide is obtained through calcination in the air atmosphere, then the cobaltosic oxide and NaH2PO2*H2O are placed at two ends of a porcelain boat respectively, the NaH2PO2*H2O is located in the windward position of the tube furnace, and the polyhedral cobalt phosphide catalyst for hydrogen production through water electrolysis is obtained through calcination in the inert atmosphere. The crystallinity of the prepared cobalt phosphide catalyst material is high, the polyhedral morphology of a metal organic frame template is kept, the catalyst shows excellent properties in an electrocatalytic hydrogen evolution reaction, and the preparation technology is simple in process.

The invention provides a nitrogen, phosphorus and sulphur doping or co-doping carbon dot and a batch controllable preparing method and application thereof. The method comprises the steps that a carbon source, a nitrogen source, a phosphorus source and a sulphur source are evenly mixed, and a mixture is obtained, wherein the molar ratio of C to N to P to S in the mixture is 1 to 0-0.8 to 0-0.4 to 0-0.4, and the contents of N, P and S are prevented from being zero at the same time; in the air, the mixture is heated to be fused, the reaction is carried out for 3 min to 60 min, natural cooling is carried out till the indoor temperature is reached, a reaction product is separated by a silicagel column, raw materials which do not react are removed, and the nitrogen, phosphorus and sulphur doping or co-doping carbon dot is obtained. According to the method, the technology is simple, the compound time is short, batch producing can be achieved, the doping amount can be adjusted and controlled accurately, the fluorescence color of the prepared carbon dot ranges from blue to green, the application can be achieved on bioluminescence marking and cell imaging aspects, and the good economic benefit and the application prospect are achieved.

The invention relates to a method of synthesizing nickel cobalt oxide electrode material using a hydrothermal method and an application thereof. The method comprises dissolving CoCl2.6H2O, NiCl2.6H2O and CO(NH2)2 into an appropriate amount of deionized water, wherein the mole ratio of CoCl2.6H2O to NiCl2.6H2O is 1 : 2; uniformly stirring the mixed solution by using a magnetic stirrer, transferring the solution into an autoclave, heating the solution to 100 DEG C and keeping the temperature constant for 10 hours; cooling the solution to room temperature, filtering, washing and drying reactants, and then annealing the reactants for 2 hours in an air atmosphere of 250 DEG C. The method is simple to operate and environmental-friendly. The prepared nickel cobalt oxide nanowire is a spinel-type cubic phase and porous, has high purity and relatively high specific surface area, and can be used as electrode materials for super capacitors, with specific capacitance thereof being 722 F / g.

A composition which is densifiable at low temperatures in an air atmosphere suitable for use as an interconnect layer in a solid oxide fuel cell. Binary alloying of SrO and CaO with LaCrO3 is used to form a compound having the general formula La(1-x)(Sr,Ca)xCrO3 which is a stabilized form of LaCrO3 and has the desirable properties for a fuel cell interconnect layer.

The invention discloses an ultrahigh-capacity lithium ion battery anode material prepared by a microwave method and a preparation method thereof. The method comprises the following steps: mechanically or chemically and uniformly mixing the hydroxide, oxide or salt containing lithium with the hydroxide, oxide or salt containing transition metal M, the hydroxide, oxide or salt containing doped metal M' and additives in a certain proportion; and then putting the mixture into an atmosphere furnace, performing heat treatment on the mixture so as to acquire the required laminar materials rich in lithium and manganese oxides. According to the invention, heating with microwave is adopted, thus not only can the heating time is shortened, and the heat use ratio is increased, but also the heat treatment is even, so that the problems of the traditional heating method that the heating is uneven, the heating time is long, the temperature is high and the like are all solved. Besides, the prepared ultrahigh-capacity lithium ion battery cathode material, namely the laminar materials rich in lithium and manganese oxides, contains no impurity phase, and has the characteristics of uniform mean grain size, excellent circulating property and excellent electrochemical performance. The preparing method provided by the invention has the advantages of simple process, low preparation cost, energy conservation, high efficiency and suitability for industrial production.

In a disclosed laser module, a usage amount of organic adhesive is set to no more than 1.0 g / ml. Thus, an equilibrium density of outgas components from the adhesive after an air removal treatment is less than 1000 ppm. In another laser module, a heat sink at which a semiconductor laser element is adhered on a submount, an electrode terminal wire-connected with the laser element, a photodiode wire-connected with the electrode terminal, and a zeolite adsorbent are fixedly provided on a stem. These are ring-welded in a container in a dry air atmosphere (80% nitrogen, 20% oxygen). In still another laser module, sixteen multiplexed lasers are disposed in a container. The container is connected with an air circulation apparatus, which is provided with a filter for removing contaminants, a rotary pump for circulating inert gas, and a valve for controlling replenishment of the gas.

The invention relates to a propane dehydrogenation to propylene catalyst and preparation and applications thereof. The propane dehydrogenation to propylene catalyst is characterized by being a composition prepared from Gamma-Al2O3, a kind or many kinds of chromium oxides, a kind or many kinds of rare earth oxides and a kind or many kinds of alkali metal oxides, wherein the Gamma-Al2O3 accounts for 30-95%, the chromium oxides account for 1-50%, the rare earth oxides account for 0-30%, and the alkali metal oxides account for 0-10%. The preparation process comprises the following steps of: adding active components, such as chromium, rare earth, alkali metal and the like into aluminum oxide grout, regulating the pH value of 1-5 to form gelatum with concentrated nitric acid, and spraying and drying to form microballoons; then roasting for 0-5 hours at 250-750 DEG C in a nitrogen atmosphere; and roasting for 0.1-20 hours at 250-1000 DEG C in an air atmosphere. The obtained catalyst is in a fluid bed reactor, and reaction conditions comprise 400-700 DEG C of temperature, 0.01-3MPa of absolute pressure and 10-10000 h-1 of volume hourly space velocity.

The invention relates to a modified lithium ion battery ternary positive electrode material and a preparation method of the modified lithium ion battery ternary positive electrode material. The chemical generation formula of the material is as follows: LiNiaCo<1-a-b>MnbBxO2 / TiO2, wherein a is more than 0 and less than 1, b is more than 0 and less than 1, (1-a-b) is more than 0 and less than 1, x is more than 0.005 and less than 0.1, and the TiO2 is a cladding layer. The soluble nickel salt, cobalt salt and manganese salt are prepared into a mixed salt solution, the mixed salt solution is reacted with a mixed alkaline solution prepared by mixing the NaOH and ammonium hydroxide, after being filtered, washed and dried, the reaction product is mixed with a boronic compound and roasted for 4h to 12h at the temperature of 300 to 800 DEG C under an air atmosphere, then the roasted product is ball milled with the lithium salt to be uniformly mixed together, the mixture is coated with titanium dioxide after being calcined at the high temperature to obtain the modified lithium ion battery ternary positive electrode material. The prepared boron doping modified ternary positive electrode material is high in specific capacity and good in cycling performance.

The present disclosure relates to the production method of inorganic nanofibres through electrostatic spinning of solution, which comprises alkoxide of metal or of semi-metal or of non-metal dissolved in a solvent system on basis of alcohol. The solution is stabilised by chelating agent, which prevents hydrolysis of alkoxide, and after homogenisation it is mixed with solution of poly(vinylpyrrolidone) in alcohol, after then the resultant solution is brought into electrostatic field, in which the electrostatic spinning is running continually, the result of which is production of organic-inorganic nanofibres, which are after then calcinated outside the spinning device in the air atmosphere at the temperature from 500° C. to 1300° C.

The invention relates to a preparation method of a load type metal compound catalyst used for water treatment, in particular to a catalyst comprising a metal oxide and metal salt. The method comprises the following steps: a porous inorganic material carrier, metal salt, a dispersant, a stabilizing agent and a accelerant which are treated are added into an organic solvent and stirred to form a load type catalyst before-preparation body mixture, the load type catalyst before-preparation body mixture stands for 1 to 9 days under a sealed condition until the load of the catalyst is completed, a steady load type catalyst before-preparation body is prepared, put in a baking oven for baking, moved into a muffle furnace and heated to 300 DEG C to 600 DEG C under air atmosphere at the speed of 2 DEG C / min to 6 DEG C / min, the temperature is kept for 1 to 8 hours, and finally, the load type metal compound catalyst used for water treatment, which forms a fixed catalyst layer with the layer thickness of 15nm to 28mum on the surface of the carrier, is prepared. The method has lower cost, little loss of raw materials in the preparation technology process and simple preparation technology, and is suitable for industrial mass production.

The invention discloses an efficient CrOx / mesoporous CaO catalyst for preparing isobutene by oxidative dehydrogenation of iso-butane and a preparation method thereof, and belongs to the field of catalysis. The prior catalyst for preparing the isobutene by the oxidative dehydrogenation of the iso-butane has the problems of low isobutene selectivity and the like. The catalyst provided by the invention uses mesoporous CaO as a carrier and uses CrOx as an active component, wherein x is 1 to 3; and the loading capacity of the CrOx active component is 4 to 12 percent in percentage by mass of Cr2O3. The preparation method comprises the following steps: dissolving soluble chromium salt into anhydrous ethanol, then adding the solution into the mesoporous CaO carrier, stirring the mixture evenly, and drying the mixture for 12 hours at 120 DEG C to obtain white solid powder; and heating the white solid powder to 550 DEG C at the rate of 1 DEG C per minute in air atmosphere in a muffle furnace, and firing the heated white solid powder for 3 hours at constant temperature to obtain the CrOx / mesoporous CaO catalyst. The CrOx / mesoporous CaO catalyst prepared by the method has high isobutene selectivity and high activity, and the preparation method has low cost and simple and convenient operation.

The invention discloses a controllable fast-heating up thermobalance reacting furnace, comprising a high temperature furnace reaction unit, a balance weighting device, an air control device and an electronic control unit, wherein the high temperature furnace reaction unit uses two-section heating, the temperature of the furnace body is set, collected and transmitted by the electronic control device; and when in an experiment, the air control device adjusts the air atmosphere in the high temperature furnace reaction unit, a sample is rapidly placed in a constant temperature zone of the high temperature furnace reaction unit to realize rapid heating up by a balance lifting mechanism in the balance weighting device, and mass change of the sample is converted into electronic signals in real time to be transmitted to the electronic control device for continuous monitoring and storing. The invention has the characteristics of large controllable range of heating rate, large range of test sample amount and controllable reaction atmosphere, thus meeting the requirement of the thermobalance test research under various reaction conditions with different sample amounts and heating rate; and common measurement equipment can perform on-line air component analysis, thus being favor of disclosing the action mechanism and control strategy in the reaction process.

The invention relates to a curing treatment method of a carbon fiber precursor polyacrylonitrile fiber. The method comprises the following steps: pre-cyclizing the polyacrylonitrile fiber precursor in the atmosphere of inert gas; carrying out cyclizing and plastic drawing in the atmosphere of inert gas and water vapor; and carrying out oxidation crosslinking in the atmosphere of air, thus obtaining a pre-oxidized polyacrylonitrile fiber. The method has the following beneficial effects: carrying out heat treatment on the fiber in the inert atmosphere is beneficial to implementation of cyclization reaction in the molecules to form rigid ladderlike molecules with regular structure and strong heat resistance, and at the same time, a defined amount of water vapor is introduced to obtain a higher drawing ratio by enhancing the plasticity of the molecular chains in the fiber, thus improving the orientation degree of the rigid molecules along the fiber axis.

The invention relates to a europium-doped Y7O6F9 nano fiber and a preparation method thereof, belonging to the technical field of the preparation of nano materials. A rare earth fluoride / rare earth oxyfluoride composite nano fiber is prepared by the traditional electrostatic spinning technology. The preparation method provided by the invention comprises the following three steps: (1) preparation of a Y2O3:5%Eu<3+> nano fiber: preparing a PVP / [Y(NO3)3+Eu(NO3)3] composite nano fiber by adopting the electrostatic spinning technology, and then, carrying out heat treatment to obtain the Y2O3:5%Eu<3+> nano fiber; (2) preparation of a YF3:5%Eu<3+> nano fiber: fluorinating the Y2O3:5%Eu<3+> nano fiber by a double-crucible method to obtain the YF3:5%Eu<3+> nano fiber, wherein the fluorinating reagent is ammonium bifluoride; and (3) preparation of a Y7O6F9:5%Eu<3+> nano fiber: placing the YF3:5%Eu<3+> nano fiber in a muffle furnace, heating at 580 DEG C under the air atmosphere for 9 hours to obtain the Y7O6F9:5%Eu<3+> nano fiber, wherein the diameter is 181-241 nm, and the length is greater than 300 mu m. The europium-doped Y7O6F9 nano fiber is a novel important red nano fluorescent material having wide application prospects.

The invention belongs to the technical field of separating film materials, and discloses an adjustable and controllable ultrathin two-dimensional nano g-C3N4 film, and a preparation method and application thereof. The preparation method comprises the following steps of performing heat treatment on dicyandiamide or cyanurtriamide under an inert atmosphere to obtain caked g-C3N4; pulverizing the caked g-C3N4 and calcining under an air atmosphere to obtain g-C3N4 powder; dispersing the g-C3N4 powder in solvent to obtain g-C3N4 two-dimensional nanosheet solution; adding electrolyte solution for modifying; depositing a g-C3N4 two-dimensional nanosheet on a porous carrier of which the pore diameter is greater than 200 nanometers to form a two-dimensional g-C3N4 ultrathin film; and drying to remove the solvent so as to obtain the adjustable and controllable ultrathin two-dimensional nano g-C3N4 film loaded on the porous carrier. The g-C3N4 film is high in water permeability and high in separation efficiency, and has a wide application prospect.

The invention discloses high-entropy ceramic powder used for a thermal barrier coating. The ceramic powder is characterized by having a pyrochlore structure and a chemical formula of RE2Zr2O7, wherein RE is any 3-7 different metal elements selected from rare earth elements including Y, La, Pr, Nd, Sm, Eu and Gd, and the percentage of one mole number of each RE element to the total mole number of all RE elements is 5%-35%. The preparation method comprises the following steps: mixing RE2O3 powder and ZrO2 powder, and heating the mixed powder under the heating condition of 1000-1700 DEG C for 1-10 h in an air atmosphere to obtain the high-entropy ceramic powder. According to the method provided by the invention, the high-entropy ceramic powder prepared by the method enriches a system of a thermal barrier coating material, has the advantages of low costs, simple and easy operation, a wide application range and the like, and is expected to be used in the field of thermal barrier coatings.

The invention relates to a hydrothermal production method of lithium ion bolting material of lithium-manganese oxide compound, which comprises the following steps: batching lithium oxidate and manganese oxidate with mole ratio of 0.5-3.0:1; delivering it to high-pressure hydrothermal autoclave after adequate mixing and grinding; adding distilled water to the mixture and processing it under 100-24 0 DEG C with 4-96h after full mixing; after filtering and rinshing to get colature of pH=7 to 8; drying it under 40-120 DEG C and processing preparatory roasting under 300 DEG C for 2h; roasting it under 300-800 DEG C in air atmosphere for 1-24h. The invention can get spinel structure lithium-manganese oxide of good crystal perfection, stable structure, and equal component. Said lithium-manganese oxide compound ionic screened material has the advantages of high selectivity and adsorption capacity when it is used to extract lithium resource from seawater and Salt Lake. The invention has the advantages of simple manufacturing process, mild conditioned response, cheap and available material and low cost of manufacture. Said lithium-manganese oxide compound can be used as electrode material of lithium ion secondary battery.

The invention provides a refrigerating and freezing device and a storage container thereof. The storage container comprises an electrolysis deoxygenization assembly and a moisture permeability assembly. The electrolysis deoxygenization assembly is used for consuming oxygen in air in a storage space, so that a nitrogen-rich oxygen-deficient air atmosphere beneficial to food preservation is obtainedin the space, the intensity of aerobic respiration of food is reduced, and the aim of long-term preserving the food is achieved. When the electrolysis deoxygenization assembly is used for consuming the oxygen in the storage space, a certain moisture is produced in the storage space, so that the inner part of the storage space is more and more humid. Through the moisture permeability assembly, themoisture in the air in the storage space can be conveyed to the outer part of the space through a pervaporation membrane through vaporization penetration, so that the humidity in the storage space still keeps in the appropriate range, and condensate or dropping water is prevented from being produced in the space. In the refrigerating and freezing device provided by the invention, the electrolysisdeoxygenization assembly and the moisture permeability assembly can be used in a matching way, so that food can be preserved favorably.

The invention relates to a titanium phosphate lithium material used for the cathode of a lithium ion battery and a preparation method thereof. The crystal structure of the titanium phosphate lithium material is an NASICON structure, and the composition is LixTi2(PO4)3, wherein x is 1 to 1.05. The preparation method of the material comprises the following steps: firstly, evenly mixing lithium-contained, titanium-contained and phosphorus-contained inorganic matter raw materials, and carrying out one-step roasting in an air atmosphere with the temperature of 800 to 1000 DEG C to prepare high-purity titanium phosphate lithium; then mixing the prepared titanium phosphate lithium with organic matter of glucose and the like in a certain proportion; milling and evenly mixing by a planet ball mill; then roasting in an inert atmosphere to obtain the carbon-cladding titanium phosphate lithium material. The preparation method is simple and has low cost, and the obtained titanium phosphate lithium cathode material has high purity, complete structure, high electrical conductivity and good electrochemical properties.

The present invention provides a positive electrode active material for a non-aqueous electrolyte-based secondary battery, composed of a lithium / nickel composite oxide with high capacity, low cost and excellent heat stability, an industrially suitable production method therefor, and a high safety non-aqueous electrolyte-based secondary battery. A lithium / nickel composite oxide is produced by the following steps (a) to (c): (a) Nickel hydroxide or nickel oxyhydroxide having a specified component is prepared at a temperature of 600 to 1100° C., under air atmosphere. (b) Fired powders are prepared after mixing said nickel oxide and a lithium compound, and then by firing at a maximal temperature range of 650 to 850° C., under oxygen atmosphere. (c) Obtained fired powders are washed with water within a time satisfying the following equation (2) and then filtered and dried. A<B / 40   (2) wherein, A represents washing time represented by unit of minute; and B represents slurry concentration represented by unit of g / L).

A light-emitting element, a bonding layer, and a frame-like partition are formed over a substrate. The partition is provided to surround the bonding layer and the light-emitting element, with a gap left between the partition and the bonding layer. A pair of substrates overlap with each other under a reduced-pressure atmosphere and then exposed to an air atmosphere or a pressurized atmosphere, whereby the reduced-pressure state of a space surrounded by the pair of substrates and the partition is maintained and atmospheric pressure is applied to the pair of substrates. Alternatively, a light-emitting element and a bonding layer are formed over a substrate. A pair of substrates overlap with each other, and then, pressure is applied to the bonding layer with the use of a member having a projection before or at the same time as curing of the bonding layer.

The invention discloses a microwave thermogravimetric analysis (TGA) method and a device, wherein, the device comprises four parts, namely, a microwave oven, a mass measurement system, a temperature measurement system and an atmosphere adjustment system. The microwave input power can be set to a fixed value and also can set to be linked with the temperature measurement system. The mass measurement system monitors the mass variation of a test sample in real time; the temperature measurement system utilizes an infrared thermometer and a thermocouple to monitor the temperature of the test sample and the hearth in real time. The atmosphere heating can be achieved by the atmosphere adjustment system and the heating atmosphere can be air atmosphere, inert atmosphere, oxidizing atmosphere or reducing atmosphere. The device provided by the invention has the advantages of simple structure, high degree of automation and convenient operation, the invention can obtain the relation among mass, time / mass, and temperature of multiple test samples under different atmospheres in the process of microwave heating, and realizes microwave thermogravimetric analysis of the test samples with larger mass or volume.

Disclosed is a method of manufacturing a flat-panel display device, includes: laminating a thermosetting resin film on a sealing substrate; stacking the sealing substrate having the thermosetting resin film laminated thereon, and an element substrate having a light-emitting element together under a vacuum atmosphere with the thermosetting resin film and the light-emitting element facing inwardly, and with a frame-shaped sealing material around the thermosetting resin film interposed between the two substrates; joining the sealing substrate and the element substrate together under a vacuum atmosphere by the sealing material situated between the sealing substrate and the element substrate stacked together; and heat-curing the thermosetting resin film situated between the sealing substrate and the element substrate stacked together, under an air atmosphere.

The invention discloses a method for preparing a high-strength carbon fiber, belonging to the technical field of the carbon fiber. The method comprises the following steps of: pre-oxidizing a polyacrylonitrile (PAN) copolymer fiber under air atmosphere at the temperature of between 200 DEG C and 280 DEG C; performing heat treatment for 50 to 70 minutes in a four-section to seven-section gradient heating mode; keeping at a temperature zone with heat treatment temperature of 250 DEG C for 9+ / -3 minutes; and carbonizing the pre-oxidized fiber under conventional carbonizing conditions, namely carbonizing the fiber under protection of a nitrogen gas at the draw ratio of -4 to +8 percent and at the low temperature of between 300 DEG C and 900 DEG C for 3+ / -1.5 minutes, and carbonizing the fiber at the high temperature of between 1,200 DEG C and 1,600 DEG C and at the draw ratio of -4 to +1 percent for 2+ / -1 minutes. The carbon fiber prepared by the method has a perfect structure and excellent mechanical property. The tensile strength of the obtained carbon fiber reaches over 3.8GPa.

The invention discloses a synthesizing method of anode material of high-pressure solid-phase ferric-lithium phosphate, which comprises the following steps: blending lithium salt, ferric salt and phosphate according to 1:1:1 proportion evenly; grinding the material into ball for 6-24 h to obtain priority; disposing priority for 2-10 h at 200-350 deg.c in the air environment; cooling naturally; grinding to obtain powder material; adding carbon material in the powder material with weight percentage of carbon material at 1-20 percent; grinding again for 6-24 h; disposing for 4-24 h at 450-1000 deg.c in the 1-15 Mpa inert environment; cooling naturally to obtain the product.

The invention discloses a method for preparing a G / Sn / PAN-base carbon nanometer fiber membrane. The method for preparing the G / Sn / PAN-base carbon nanometer fiber membrane includes: 1) preparing spinning solution, to be more specific, weighing polyacrylonitrile, nanometer tin powder and graphene nanometer film according to certain mass ratio, blending and dissolving in N-N dimethyl formamide, and stirring to obtain the uniformly dispersed electrostatic spinning solution; b) electrostatic spinning, to be more specific, carrying out electrostatic spinning on the electrostatic spinning solution of the step a) to obtain a graphene / tin / polyacrylonitrile nanometer fiber membrane; c) pre-oxidizing, to be more specific, pre-oxidizing the graphene / tin / polyacrylonitrile nanometer fiber membrane of the step b) in air atmosphere to obtain the pre-oxidized nanometer fiber membrane; d) carbonizing, to be more specific, carbonizing the pre-oxidized nanometer fiber membrane in argon atmosphere to obtain the G / Sn / PAN-base carbon nanometer fiber membrane. The method for preparing the G / Sn / PAN-base carbon nanometer fiber membrane is easy to operate, the graphene coats the nanometer fiber well; the G / Sn / PAN-base carbon nanometer fiber membrane has advantages of large specific surface area, high porosity, and high electrical conductivity and so on, and has broad expanding space.

The invention provides a preparation method of a high silica alumina ratio MCM-22 molecular sieve catalyst. The method comprises the following steps: raw materials of sodium source, silicon source, aluminium source, boron source, templeting agent and deionized water are put in a synthesis reactor according to the mixture ratio and statically or dynamically crystallized for 1-20 days at the crystallization temperature of 110-200 DEG C, and the product is filtered, washed and dried to obtain molecular sieve initial powder; and the obtained molecular sieve initial powder is roasted in the air atmosphere at the high temperature of 450-750 DEG C so as to remove the templeting agent and is exchanged into an ammonium type molecular sieve by an ammonium ion exchange method, the ammonium type molecular sieve is roasted at the temperature of 450-750 DEG C to obtain a corresponding hydrogen type molecular sieve, and the hydrogen type molecular sieve is prepared into the high silica alumina ratio MCM-22 molecular sieve catalyst after being molded. By using the method, the MCM-22 molecular sieve catalyst with controllable silica alumina ratio, high crystallization degree and high silica alumina ratio can be prepared, and the invention breaks through the range of the silica alumina ratio of the MCM-22 molecular sieve catalyst of the conventional method and overcomes the problem of descending of crystallization degree generally existing in the post-processing method.