188 results about "Microwave - action" patented technology

The present invention discloses an organic matter / expanded graphite composite phase-changing heat-storing building material and the preparation thereof, the method comprises the following procedures: (1) the swelling of the acidic graphite under the function of the microwave to form the expanded graphite with abundant micropore structure; (2) executing blending adsorption to the organic phase-changing material and the expanded graphite at the condition higher than the phase transition temperature, and the organic phase-changing material is adsorbed to the micropore structure of the expanded graphite; (3) the preparing of the organic / expanded graphite composite phase-changing heat storing building material comprising the following steps: (a) the preparing of the heat storing fiber gypsum board, (b) the preparing of the heat storing cement. The method of the invention settles the compatibility of the problem of organic phase-changing material and the building material and the stability. The organic / expanded graphite composite phase-changing heat storing building material has the advantages of low cost, large heat storing density, good heat conducting property and no inflammability.

The invention relates to drying equipment which is characterized by comprising a distributing bucket, a conveying belt, two inhibitory systems, a microwave action cavity, a microwave generating source, an electronic control system, a dehumidifying system and a feeding bucket. The distributing bucket is arranged above the feeding end of the conveying belt, the inhibitory systems are connected with the microwave action cavity, the feeding bucket is arranged below the discharging end of the conveying belt, and the conveying belt sequentially passes through the inhibitory systems, the microwave action cavity and the inhibitory systems. The microwave generating source is arranged outside the microwave action cavity and used for generating microwaves. The electronic control system is used for controlling operation of the drying equipment. The dehumidifying system is used for pumping moisture in the microwave action cavity. According to the drying equipment, the microwaves are used for heating, the conveying belt is adopted, a material overturning device is added in the running process of the conveying belt, and therefore materials can be turned over back and forth in the drying process. Besides, drying is enabled to be more rapid and thorough, efficiency is higher, and the drying equipment has a wide market prospect.

The present invention discloses waste water treating microwave and light catalyzing method and apparatus. After grille depurating, still standing to deposit and pH regulation, the waste water to be further treated is microwave and light catalyzed in the waste water treating microwave and light catalyzing apparatus. The apparatus includes microwave reaction oven, waste water reaction chamber inside the microwave reaction oven, no-electrode lamp inserted inside the annular fixer on the inner wall of the waste water reaction chamber, and quartz stirrer set inside the waste water reaction chamber with shaft connected to the outer rotating motor. The present invention has prolonged service life of no-electrode lamp, raised photocatalytic degrading efficiency, simple apparatus, low power consumption and other advantages, and the combined microwave effect and photocatalytic oxidizing technology results in high organic matter eliminating rate.

The invention relates to a device and a method for improving coal bed gas desorption efficiency with microwaves, and belongs to the technical field of coal mine safety production. The device and the method allow the generated microwaves to act on a coal body, have a triaxial loading function, simulate a stress state of the coal body and a gas absorption and desorption process, obtain a coal body desorption rule by the action of the microwaves, and provide reference data for effective drainage and comprehensive utilization of the coal bed gas. The device comprises a microwave excitation coal bed gas desorption seepage experimental device and a triaxial coal rock pressed absorption and desorption system, wherein the triaxial coal rock pressed absorption and desorption system consists of a first pressure regulating valve, a second pressure regulating valve, a third pressure regulating valve, a methane gas cylinder, a loading gas cylinder, a confining pressure gauge, an axial pressure gauge, a pore pressure gauge, a flowmeter and a temperature control meter. The method for improving the coal bed gas desorption efficiency with the microwaves comprises the following steps of performing an absorption experiment, and performing a microwave excitation desorption experiment.

The invention provides a preparation method of a NiCo2S4 nano-material. The preparation method comprises the following steps: firstly, mixing a soluble cobalt source, a soluble nickle source, urine and a solvent to obtain a reaction precursor solution; then placing a conductive substrate in the obtained reaction precursor solution, performing reaction under the microwave action, and then performing heat treatment to obtain a NiCo2O4 nanosheet; and enabling reaction between the obtained NiCo2O4 nanosheet and a sulfide to obtain the NiCo2S4 nano-material. The preparation method is simple in process, low in cost and energy consumption, short in reaction time, and favorable for large-scale industrial expansion; the NiCo2S4 semiconductor nanosheet is uniform in shape and large in specific area; controllable growth of a nano-structure thin film can be realized, so that full contact with an electrolyte is realized; quick ion diffusion and effective charge transmission are guaranteed; the NiCo2S4 nano-materia can be directly used as a counter electrode of a dye-sensitized solar cell and has a huge application prospect.

The invention relates to a microwave electro-Fenton method for processing organic wastewater and a device thereof. Under the action of microwave, a boron-doped diamond film electrode is used as an anode material for electrochemical degradation processing, and organic pollutant containing wastewater is processed efficiently by an electrochemical method. According to the invention, the boron-doped diamond film electrode is utilized to continuously generate hydroxyl radical with strong oxidation capacity in a wastewater system containing divalent iron ions, and in-situ activation of the boron-doped diamond film electrode is carried out by means of thermal effect and non-thermal effect of microwave so as to increase activity of the electrode and promote mass transfer process during the degradation process of organic pollutants. Therefore, the oxidation capacity of the electro-Fenton reaction is enhanced, and mineralization reaction rate is effectively accelerated. In comparison with traditional Fenton and electro-Fenton methods, the processing effect of the microwave electro-Fenton method provided by the invention is effectively enhanced. The method provided by the invention is simple to operate, has a good effect of processing organic wastewater, and has a wide application prospect as well as development potential.

The invention belongs to the field of medical technology, and particularly relates to a method for extracting ginsenoside. The method for extracting ginsenoside comprises the following steps of: smashing and sieving raw ginseng, adding 90-120U / mL of crude enzyme extract, conducting enzymolysis for 0.5-2hours at 50-70 DEG C, filtering, adding an organic solvent into residual slag, conducting microwave extraction and then conducting digestion, filtering, decompressing and concentrating the filtrate, and drying to obtain crude ginsenoside. The ginsenoside is extracted from the ginseng by adopting a method for combining an enzymic method and organic solvent extraction, the enzyme added in the method can effectively degrade lignin, prompt the release of active constituents of plants and greatly improve the extraction rate of the active constituents; and according to the extraction method, microwave action is assisted in the organic solvent extraction process, the extraction of effective constituents can be further increased, the bioactivity can be better maintained, and the method is more suitable for industrial production.

The invention relates to the field of materials added to a filter stick of a cigarette, in particular to a method for preparing the expanded stem granules for the filter stick of the cigarette; the invention aims to greatly improve the production efficiency by further optimizing the process for preparing the expanded stem granules applied to the filter stick of the cigarette and achieves better technical effect of the prepared expanded stem granules. The method comprises the following steps: firstly, conducting the microwave expansion treatment on a stem; conducting the conditioning treatment on the expanded stem; granulating the conditioned stem, namely, allowing the conditioned stem to enter a granulation device, and subjecting the conditioned stem to granulation and screening, so as to obtain stem granules with the granule diameters being 26 to 40 meshes; then, conducting the recovery-sizing treatment on the stem granules, namely, placing the stem granules in a recovery-sizing device, and dewatering the conditioned stem under the microwave action until the water content is 3% to 9%; and finally, cleaning, namely, cleaning the sized stem granules to remove dust.

The invention relates to a method for extracting and separating chlorogenic acid from chrysanthemum. The method comprises the following steps: after water-removing is performed to a chrysanthemum, the raw material is lixiviated with solvent under the ultrasonic or microwave action, the crude extract of the chlorogenic acid is obtained after through solid-liquid separation, and then the chlorogenic acid pure product is obtained after through resin adsorption, separation and elution. The solvent is water, organic solvent or organic solvent-water mixed liquor. The water-removing is performed to the chrysanthemum, and the chrysanthemum is lixiviated with organic solvent or water at assistance of ultrasonic sound and microwave. Therefore, the yield of the chlorogenic acid can be improved, the production cycle is reduced, the chlorogenic acid pure product is obtained not the mixture with other ingredients, and the chlorogenic acid monomer is extracted form one chrysanthemum. Therefore, the range of the raw material of the chlorogenic acid can be extended, especially for the chrysanthemum in Canada, the chrysanthemum can turn the harmful into the beneficial and waste into valuable after development and utilization, and the invention has good economic, social and environmental benefits.

The invention provides a method for determination of scandium in bauxite by microwave digestion inductively coupled plasma atomic emission spectrometry. Specifically, a sample is digested through hydrofluoric acid, nitric acid, hydrogen peroxide and phosphoric acid under the action of microwave, ultrapure water is added to a constant volume, an inductively coupled plasma emission spectrometer is employed to determine Sc so as to realize accurate determination of the trace element Sc in the bauxite sample. The method provided by the invention reduces tedious operation process, employs microwave to digest the sample and direct instrument determination, and has no need for acid removal. Compared with the traditional sample processing method, the method provided by the invention has the characteristics of simple operation steps, little reagent consumption, and rapid analysis speed. At the same time, the method employs microwave digestion to decompose the sample, and can greatly lower the reagent dosage, reduce the reagent blank and matrix interference, and improve the sensitivity and accuracy of analysis elements.

The present invention discloses a method for extracting a mixture of tea polyphenol through soaking, wherein the mixture of tea polyphenol is extracted through the soaking method. The method comprises the following steps of (1) adding water or 30% of ethanol to the tea with the caffeine extracted according to a solid-to-liquid ratio of 1:5-8, soaking the mixture for the first time in the presence of normal temperature and microwave action; (2) adding water or 30% of ethanol to the filter residue after the first soaking and filtering operation according to a solid-to-liquid ratio of 1:3-5, soaking the mixture for 4 to 6 hours for the second time in the presence of a microwave with the heating temperature range thereof 65 to 80 DEG C; after 20-30 minutes since the completion of the microwave action, filtering, concentrating, and drying the mixture to obtain the mixture of tea polyphenol. The technical method for extracting the mixture of tea polyphenole from tea has no need of chemical solvent for separation, and can prepare pollution-free products as well as high-purity substances of catechin, tea polysaccharide and the like in the tea polyphenol mixture. The invention has the advantages of high extraction ratio, low cost, simple technology and easy massive preparation.

The invention relates to a preparation method of an ionic-liquid modified active carbon electrode material, which comprises the following steps: mixing 1-methyl-3-butylimidazolium glutamic acid ionic liquid with carbohydrate compounds, uniformly stirring under a microwave action to obtain a brownish-black viscous substance, i.e. carbon spot ionic liquid; and then adding de-ionized water into the carbon spot ionic liquid to prepare a carbon spot ionic liquid solution, placing active carbon powder into the solution to be uniformly mixed, soaked, dispersed by ultrasonic waves, induced by microwaves and filtered to obtain a solid phase, and finally vacuum-drying the solid phase to obtain the ionic-liquid modified active carbon electrode material. The method is simple to operate, the adopted carbon spot ionic liquid is friendly to the environment, has no pollutant and can be recycled, and the prepared ionic liquid has excellent electrolyte wettability; and the modified active carbon has large specific surface area, is uniform in aperture distribution, and has multiple conductive active substances and small internal resistance. When the modified active carbon electrode material is used as an electrode material for a super-capacitor, the specific capacity, application efficiency, service life, specific capacitance and constant-current discharging-charging efficiency of the super-capacitor can be improved.

The invention relates to a method for preparing composite biological stuffing on the basis of modified shells, and belongs to the technical field of biological stuffing. The method aims at solving the problems that existing fixed-type stuffing is small in specific surface area, low in biological film quantity and smooth in surface, biological films are prone to disengagement, and a stable and sustaining removing effect is difficult to maintain. The method comprises the steps that discarded shells are utilized, and the surfaces of the shells are modified through starch and ethylene glycol amine under the microwave action; then the shells are subjected to ball-milling activation, and the internal structure is modified through oscillation under ultrasound, the modified shells are loaded on loofah sponges, so that the microorganism biological film forming performance is improved, and disengagement is prevented; the loofah sponges loaded with the modified shells are mixed with auxiliaries, and the composite biological stuffing which has the advantages that the specific surface area is large, the biological films are not prone to disengagement, and the stable and sustaining removing effect can be maintained is prepared.

The invention discloses a process method for microwave assistant supercritical extraction of active ingredients of curcuma. In the method, the active ingredients, namely curcumin and fat soluble curcuma oil, of curcuma are extracted by the synergistic action of the microwave technology and the supercritical technology. The process method mainly comprises the following steps of: performing microwave intermittent sudden heating and then carbon dioxide (CO2) supercritical extraction; separating CO2 and curcuma oil in an analyzing kettle; and adding water or ethanol into curcuma residue in a solid-to-liquid weight ratio of 1:7-14, and performing microwave action, twice soaking, filtration, condensation and spray drying to obtain the curcumin. The process method solves the problem that in the prior art, only single active ingredient can be extracted or the compositions of the extract are not balanced, and realizes the extraction of two main active ingredients, namely curcuma oil and curcumin, of the curcuma at the same time, and the yield is over 8 percent and 13 percent respectively. The process method is the physical method and has the advantages of no product pollution, high purity, low cost, simple process and easy mass production.

The invention discloses a method for effectively preparing zeaxanthin from marigold oleoresin; marigold oleoresin is used as the reaction raw material; zeaxanthin is obtained by utilizing isomerization reaction; marigold oleoresin is dissolved under ultrasonic conditions; and isomerization reaction is carried out under the action of microwave. According to the invention, conversion is carried out in an assisted manner by adopting an ultrasonic-microwave combined technology; the reaction conditions are mild; the product unit content is high; the conversion rate is high; the method is applied to industrially producing high-content edible zeaxanthin; found from experiments, because the ultrasonic-microwave combined technology is used in the reaction, the reaction time is easily shortened; the reaction temperature is reduced; the reaction conversion rate is increased; and the method disclosed by the invention is simple in process, low in energy consumption, little in harmful organic solvent, high in product unit content and high in conversion rate, and is applied to industrially producing edible zeaxanthin in a large scale.

The invention discloses a method for extracting ursolic acid from red jujubes, and is characterized in that the method comprises the following steps: cleaning and drying red jujubes, pulverizing the red jujubes, weighing red jujube dry powder, adding an ethanol aqueous solution with an amount of 20 times of the weight of the red jujubes as an extraction solvent; then, transferring the solution into a microwave reactor with a microwave control temperature being set at 60-80 DEG C, power of 200-400 W, microwave action time of 80-100 s, cooling, repeating the operations of microwave reaction and cooling for 1-10 cycles, centrifuging the extract, performing reduced-pressure filtration of the supernatant, collecting the filtrate, performing reduced-pressure distillation to obtain an ursolic acid extractum; finally, washing the extractum with distilled water and petroleum ether, filtering, dissolving the extractum with anhydrous ethanol, adding active carbon for decoloration, performing recrystallization, performing suction filtration to obtain the ursolic acid extract. The extraction method of the invention has high extraction efficiency, and the ursolic acid extract obtained by the extraction method of the invention has high product purity.

The invention relates to a method for promoting extraction of active components in honeysuckle flower by microwaves. The active components in the honeysuckle flower can be extracted with a solvent and subjected to further processing. The extraction of the honeysuckle flower generally uses water or ethanol as the solvent, and a microwave action is further used, thereby enhancing the yields of the main components and shortening the extraction time.

The invention relates to an extraction method of in vivo active substances of plants, and in particular relates to a method for extracting flavonoid compounds from passion fruit leaves by an ethanol-microwave soaking leaching process. In order to achieve the purpose, the invention adopts the technical scheme as follows: the method comprises the following steps of: removing impurities from dry passion fruit leaves, pulverizing to get powder, soaking the powder in ethanol, leaching for 1 to 1.5 hours with the aid of microwave treatment, centrifuging to remove filter residues after the leaching is completed, collecting the filtrate, filtering with a filtering membrane, recovering ethanol, concentrating under vacuum to get a concentrate with a concentration of 50% to 90%, and determining the total content of flavonoid compounds in the concentrate by an aluminum chloride colorimetric method. After determination, the content of flavonoid compounds is 6% to 9%. Since the passion fruit leaves are soaked in ethanol for 0.5 hours before leaching, the effect of microwave action is significantly enhanced and the total yield of flavonoid compounds is greatly increased. Besides, the concentration of ethanol is increased so as to minimize the solid-liquid ratio and achieve the purpose of energy conservation and consumption reduction.

The invention discloses a microwave silicon carbide ceramics heating element and a preparation method thereof, and belongs to the technical field of the ceramic material. The microwave silicon carbide ceramics heating element is formed by sintering after mixing and pressing microwave absorbing ceramic powder and a bonder. The microwave absorbing ceramic powder comprises the following raw materials by weight percentage: 68%-73% of silicon carbide, 1%-5% of aluminum oxide, 1%-6% of zirconium oxide, 18%-23% of ferroferric oxide, 1%-6% of hafnium oxide, 1%-6% of silicon dioxide, 1%-5% of yttria, and 2%-5% of lanthanum trioxide. The ceramics heating element is capable of rapidly warming under the microwave function, and has the characteristics of high thermal efficiency, stable performance, and energy-saving.

The invention discloses a synthetic adsorbent and a preparation method and application thereof to degradation of VOCs. The preparation method of the synthetic adsorbent comprises the following steps: (a) analyzing the contents of elements in blast furnace slag, and calculating the specific value of Mg / (Mn+Si) and the specific value of Mn / (Mn+Si); (b)adding MgO and SiO2 into 1 g of the blast furnace slag to adjust the specific value of Mg / (Mn+Si) and the specific value of Mn / (Mn+Si) to prepare a mixture A; (c) adding deionized water into the mixture A prepared in the step b, and performing stirring under the microwave action to prepare a mixture B; and (d) placing the mixture B prepared in the step c into a reaction kettle to be subjected to heating reaction, then washing the product with deionized water, and performing drying to prepare the synthetic adsorbent. When the synthetic adsorbent is adopted to degrade exhaust gas of VOCs, the VOCs treatment effect is good and the degradation efficiency is high.

The invention discloses a method for preparing a large-mixing-amount low-quality mineral admixture recycled cement-based product through microwave curing. The preparation method of the recycled cement-based product comprises the following steps: mixing a recycled aggregate with alkali liquor in a vacuum environment, ultrasonically dispersing and mixing a mixture of the alkali-treated recycled aggregate, a low-quality mineral admixture, a dispersing agent and the water, putting the mixture into the vacuum environment again, adding cement and a fine aggregate, stirring and molding, and curing and accelerating coagulation of a molded cement-based product under the action of microwaves. According to the method, the hydration hardening rate of cement-mineral admixture slurry can be increased through the microwave effect, and early performance increase of the cement-based product is promoted; besides, under the action of the microwaves, the modification effect of the alkali liquor on the recycled aggregate and the alkali-activated activity of the low-quality mineral admixture are subjected to accelerated reaction in pores of the recycled aggregate, filling is compact, the defects that the recycled aggregate is large in porosity, large in water absorption rate and the like can be effectively overcome, and the long-term mechanical property and durability of a cement-based product are improved.

The present invention discloses a hot press molded melamine foam, and the melamine foam comprises, by weight, 100 parts of melamine resin, 1-10 parts of a surfactant, 5-40 parts of a foaming agent, 0-20 parts of an assistant, 5-20 parts of a catalyst, 0-30 parts of water, and 5-30 parts of hot pressing rubber powder particles. The invention also discloses a preparation method for the hot press molded melamine foam, and the method includes following steps: preparation of the melamine resin; preparation of a semi-finished product of the melamine foam: mixing raw materials uniformly to form a foaming solution, and subjecting the foaming solution to microwave action to obtain the semi-finished product; and preparation of a melamine foam finished product: spraying a liquid formed by dispersion of the hot pressing rubber powder particles during the moving of the semi-finished product of the melamine foam, and press-forming the dried foam by a thermo-compressor to obtain the melamine foam finished product. Reticular layer structures of the melamine foam are adhered together through melting of the hot pressing rubber powder particles in the method, and the melamine foam has good mechanical properties and flame retardance, and does not increase the formaldehyde content. The method is capable of continuous production.

The invention relates to a new method for efficient cracking and viscosity reduction of thickened oil. according to the method, a nano-catalyst, a hydrogen donor, thickened oil and a microwave heating system, etc. are mainly included, and problems of long time, high temperature, environmental pollution and the like in a conventional viscosity-reducing method can be solved. The method belongs to the field of oil recovery enhancement. The technical key point is as follows: a few nano-particles with high dielectric constant are added into the thickened oil; under the action of microwave, the nano-particles are a high-temperature carrier and a catalyst; and by breaking matrix branches such as C-S bond in thickened oil molecules, the efficient cracking and viscosity-reducing effect is achieved. It shows through researches that by the adoption of a carbon nano-catalyst (particle size being 21nm) in combination of microwave heating, viscosity of thickened oil can be greatly reduced (viscosity reduction rate being 96%), lightweight components are remarkably increased, heavyweight components are reduced, fluidity of crude oil after cracking is effectively maintained, and efficient cracking and viscosity reduction of thickened oil under conditions of low temperature and short time is finally realized. The method of the invention is economic and environmentally friendly, is simple to operate and has a considerable oilfield site application prospect.

This invention relates to N- isopropyl acrylamide temperature sensitive hydrogel and its microwave radiation preparation method. The method is that: add monomer N- isopropyl acrylamide, cross-linking agent N, N'-methylene bisacrylamide and initiator 2,2-azobisisobutyronitrile to acetone, inlet nitrogen to drive oxygen; then put it to microwave workstation, at frequency for 2450MHz, power for 30 to 60W to prepare; the gained hydrogel possesses regular middle pore size distribution; BET specific surface is 46.15 to 102.77 sq m / g, big and middle pore specific surface is 20.48 to 60.19 sq m / g, pore volume is 0.043 to 0.105 cu mm / g, average pore size is 31.8 to 50.4.

The invention relates to a fog sealing layer material, a preparation method and application. The material is prepared from, by mass, 80-120 parts of emulsified asphalt, 2-5 parts of carbon nanotube dispersion liquid, 5-10 parts of a penetrating agent, 150-250 parts of silicon carbide and 30-60 parts of ferroferric oxide. The fog sealing layer material has the repairability, when microcracks existon a fog sealing layer, a second fog sealing layer and other maintenance overlay layers are not needed, and the fog sealing layer material can be repaired through microwaving treatment; the fog sealing layer material is compounded by carbon nanotubes, the silicon carbide, the ferroferric oxide and other materials, the thermal conductivity and microwave conversion efficiency of the material can besignificantly improved, so that under the microwave effect, the efficiency of the material is higher, and it is achieved that in the same melting state, microwave energy consumption can be reduced by10-15%; the adopted material makes the fog sealing layer achieve good thermal conductivity, good microwave conversion efficiency and good pavement performance, and the carbon nanotubes can improve theperformance of an asphalt material; the silicon carbide has good abrasive resistance performance, and the abrasive resistance performance of the fog sealing layer is further improved.

The invention discloses a microwave log-drying device, which comprises a box body, a power machine, a control system and an electrical control cabinet. The inner top part of the box body is provided with a microwave generating source, the lower part of the microwave generating source is provided with a microwave acting cavity, the microwave acting cavity is internally provided with a plurality of rows of rollers in the vertical direction, and the rollers can rotate forwards and reversely. A power machine chamber is arranged under the rollers, and the power machine used for driving the rollers to rotate is arranged in the power machine chamber; and the upper side of the box body is provided with a fan, and an induced air port of the fan is communicated with the microwave acting cavity. Microwave energy is adopted to dry logs, the microwave log-drying device has the advantages of uniform heating and high efficiency, the thermal efficiency is high, power consumption can be minimized, and automated control can be realized easily. Since the logs can be rotated forwards and reversely, every side face of the logs can be heated uniformly, and good heating effects can be achieved.

The invention provides a method and an apparatus for continuous oil product hydrodesulphurization by using microwaves. The method comprises the steps that: a fixed bed reactor is adopted; a hydrodesulphurization catalyst is filled in a middle part in the rector; with a microwave generation and transmission apparatus, microwaves are generated and are fed into the reactor; an oil raw material is mixed with hydrogen gas, and the mixture is continuously delivered into the fixed bed reactor, such that the oil raw material and the hydrogen gas contact the hydrodesulphurization catalyst and are subjected to a hydrodesulphurization reaction under the effect of microwaves; and a product of the hydrodesulphurization reaction is fetched from the reactor, and is subjected to post-treatment. According to the invention, a microwave technology is practically applied in the oil product continuous hydrodesulphurization process, such that process conditions are moderated, oil product desulphurization efficiency can be effectively improved, and oil refining can be more economical.

The invention discloses a carbon aerogel catalyst synthesized based on microwave action as well as a synthesis method and application thereof, wherein the preparation method of the catalyst comprises the steps: taking resorcinol and formaldehyde as reaction raw materials, taking water as a solvent, adding the reaction raw materials into water, adjusting the pH value to 5-7, placing the reaction liquid system in a microwave radiation environment, and reacting; and after the reaction is finished, drying, transferring the obtained solid into a tubular furnace, and roasting in a nitrogen atmosphere to obtain the carbon aerogel catalyst product. A microwave synthesis method is used for replacing a normal-temperature stirring method to prepare the carbon aerogel catalyst, the method has the advantages that operation is easy, synthesis is rapid, and the influence of selectivity of hydrogen peroxide preparation through electrocatalytic oxygen reduction of the carbon aerogel catalyst is explored by controlling the time for synthesizing the carbon aerogel catalyst through microwaves; and the catalyst provided by the invention has good hydrophobic and electro-catalytic effects, and has a good application prospect in a reaction for catalytically preparing hydrogen peroxide.

The invention discloses a method for degrading tetracycline by using minerals. The method comprises the following steps that 1, a hydrochloric acid solution of tetracycline is prepared; 2, the minerals and the hydrochloric acid solution of tetracycline are mixed; and 3, tetracycline is degraded under the microwave action. The degradation method provided by the invention is simple and easy to implement, the conditions are mild, and control is easy. By means of the method, the degradation efficiency is 85% or above, especially the degradation amount of the tetracycline by minerals per unit is large and can reach 20-22mg / g, consumption of raw materials is greatly reduced, and cost is lowered. Moreover, the method can be carried out at a wide microwave frequency band and is particularly suitable for being carried out at high frequency.

The invention belongs to the technical field of environmental protection and comprehensive resource utilization, in particular to a method for making an environment-friendly wood material through the microwave shaping of straws. A microwave deep heating technology is adopted in the invention. A straw raw material is squeezed into a microwave reaction cavity by a feeder after being mixed with a catalyst and heated to 120-260DEG C under microwave action. The fibers of the raw material are dried, the generation of lignins is increased, the material binding property is improved, and meanwhile, after the raw material is shaped under the condition of being pressed, the strip wood material with different cross section shapes, any edge length or a diameter larger than 60mm is extruded. As the hollow and light characteristics of the straws are fully utilized by the material made by the method in the invention, the material has great heat insulating and sound insulating effects, is mould-proof, does not absorb water, is safe and environment-friendly, can replace wood or plastics and has wide application prospects.