141results about How to "Has strong oxidizing properties" patented technology

The invention discloses a preparation method of chitosan and particularly provides a preparation method of chitosan with high deacetylated degree and high molecular weight. The preparation method comprise the following steps of: firstly, preparing raw materials, removing calcium salt through acid treatment, removing protein through alkali treatment, and removing astacin to obtain chitin, and deacetylating the chitin to obtain the chitosan. Compared with the prior art, the preparation method has the advantages that the time on removing calcium and the astacin is shortened, and the molecular weight of the chitosan is improved. By using an alkali intermittent method for deacetylation by steps, the deacetylated degree of the prepared chitosan reaches 91-93 percent, and the viscometric average molecular weight of the prepared chitosan is 8.9*105-94*105.

The invention discloses a stripping processing method of textile printing defective items, which implements stripping processing on printing defective items and particularly on dyeing defective items by using an active material which is generated by initiating and catalyzing an oxidant or a reducing agent under ultraviolet light and low temperature and has strong oxidability or reducibility as a stripping agent so as to be convenient for the rehandling or redyeing of textiles. Because of the adoption of various active materials which are generated by ultraviolet light initiation and optical catalysis as the stripping agent, the method can obtain an approving stripping effect under normal pressure and temperature, thereby avoiding the consumption of a large amount of energy sources in a traditional high-temperature stripping method and the use of a large amount of reducing agent, oxidant and the like. The stripping technology of the invention has the advantages of high efficiency, energy saving, emission reduction, simple equipment and process and short procedures.

The invention relates to a combination type efficient sludge dewatering conditioning method and belongs to the field of sludge dewatering preprocessing. According to the technical scheme, the method includes performing acidification treatment on sludge to be dewatered through concentrated sulfuric, adjusting the pH of a sludge system to range from 3.5 to 5, and stirring for 15 to 30min through a stirring blade; adding strong oxidizing agent, namely potassium ferrate, with the content of 0.2% to 4% of the total solid sludge into acidified sludge after water dissolving, stirring for 2min in the speed of 200 to 300 r / min rapidly, and stirring for 20 to 40min in the speed of 80 to 150 r / min slowly; adjusting the pH to range from 3.5 to 5 through concentrated sulfuric, adding ferrous sulfate with the content of 4% to 8% of the total solid sludge after preparing the ferrous sulfate as solution with the concentration of 20% to 50%, after stirring and scattering, adding H2O2, with the concentration of 30%, with the content of 4% to 8% of the total solid sludge, and reacting for 30 to 50min completely during slow stirring; finally, adding quicklime with the content of 3% to 8% of the total solid sludge into the sludge conditioning system, adjusting the system pH to range from 6 to 8, scattering the quicklime evenly, and dewatering.

The invention discloses an Ag3PO4 photocatalysis and artificial wetland microbial battery coupling system and application thereof. The system comprises an artificial wetland pool and a power supply used for photocatalysis, wherein a first gravel layer, an anode conductive filler layer, a second gravel layer and a cathode conductive material layer are distributed in the artificial wetland pool from bottom to top; an anode is formed by the anode conductive filler layer, a photocatalytic cathode is formed by the cathode conductive material layer, and the photocatalytic cathode and the anode are respectively led out by a lead and are connected with an external circuit; wetland plants are cultivated in the cathode conductive material layer; the cathode conductive material layer is filled with a conductive carbon material and an photocatalyst Ag3PO4. The invention also discloses the application of the system in treatment of dye wastewater. The invention couples a photocatalysis technology and an artificial wetland microbial battery, thus enhancing the treatment effect of the dye wastewater.

The invention relates to a method for electrolyzing orange G by adopting a cerium-doped tin antimony oxide coated titanium electrode. The invention belongs to the technical field of electrochemistry and environmental chemistry, in particular to a method of carrying out oxidative degradation research on orange G analog waste water in an aseptate electrode tank by adopting a constant current electrolytic method by taking a self-made cerium-doped tin antimony oxide coated titanium electrode as the anode and a titanium plate as the cathode. Under the optimum process conditions that the effective areas of a negative electrode and a positive electrode are both 2.5cm*2.5cm, the distance between the electrodes is 1.5cm, i is equal to 4.8mA / cm<2>, the concentration of the orange G is 40mg / L, the concentration of NaCl is 0.35mol / L and pH is 7, the time of electrolysis is 30min, and the removing rate of the orange G reaches 99.4 percent. The invention improves the removing effect of the orange G with low energy consumption and no secondary pollution and meets the actual demands of industry.

The invention provides solder removing liquid, a preparation method and application thereof. The solder removing liquid comprises the following components in percentage by weight: 15-50 percent of nitric acid, 1-20 percent of ferric nitrate or ferric chloride, 1-5 percent of sulfoacid and the balance of water. The solder removing liquid provided by the invention has the advantages of strong oxidability, high speed of dissolving solder, simpleness and easiness of raw materials, low preparation cost, no containing of a stabilizing agent and simple formulation and favorability of recycling valuable metals in waste liquid; and the waste solder removing liquid formed after desoldering can stand to generate beta-stannic acid sediment and is convenient for recovering tin metal.

The invention discloses an anti-charged dust device used on the surface of an optical system or a solar cell, comprising a substrate, as well as a tin indium oxide layer, a titanium dioxide nanoparticle array layer and a fluorine-containing polymer thin film layer, which are sequentially formed on the substrate, and the substrate is glass used on the surface of the optical system or a silicon chip used on the surface of the solar cell. Under continuous ultraviolet radiation, the surface of the device is continuously positively charged, thereby enabling dust adhered on the surface to finally have the same charge with that on the surface of the device regardless of the original charge of the dust, and further enabling dust particles to be separated from the surface under the action of electrostatic repulsion. In addition, a hole generated by the titanium dioxide layer under the ultraviolet radiation has strong oxidizing property, thereby being capable of decomposing organic matters adhered on the surface of an optical device and playing a bactericidal role. The device can achieve good dust prevention and dust removal effects, and effectively prevent light transmittance on the surface of the optical system or the solar cell from being reduced due to hindrance of the dust.

The invention provides a nano-catalysis, electrolysis, flocculation and air-floatation device. A coagulative precipitation tank, a primary air-floatation tank, an electrolytic air-floatation tank and a slag-discharging tank are arranged in a housing of the device, wherein the top of the coagulative precipitation tank is provided with a water inlet and a mixer; the bottom of the coagulative precipitation tank is communicated with the primary air-floatation tank; a side sewage-draining outlet is connected with a sewage-draining pipe; a dissolved gas release pipe is arranged at the edge of the primary air-floatation tank; the sewage-draining outlet is connected with the sewage-draining pipe; the upper portion of the inner side of the primary air-floatation tank is communicated with the electrolytic air-floatation tank; the electrolytic air-floatation tank is divided into an upper layer and a lower layer by an upper-lower separator plate; a slag-scraping device is arranged in an upper gas-liquid separation chamber; an electrolytic cell is mounted between the upper layer and the lower layer of the electrolytic air-floatation tank; the bottom of the electrolytic cell is fixed on the inner bottom of the casing; the top of the electrolytic cell is open and horizontal with the top of the upper-lower separator plate; an electrode is installed in the electrolytic cell; and an interval between an anode and a cathode of the electrode serves as a water passage. The device integrates multiple functions of electrolysis, flocculation precipitation, air-floatation and the like together, has high automation degree, sewage-discharging efficiency and low running cost, and is convenient for operation and maintenance.

The invention discloses a method for degrading organic wastewater through heterogeneous ultraviolet catalytic oxidation. The method comprises the following steps of firstly preparing manganese ferrite by adopting a chemical co-precipitation method; sequentially adding the manganese ferrite, organic wastewater and hydrogen peroxide to an organic wastewater treatment device; and finally opening an ultraviolet source of the organic wastewater treatment device for radiation treatment of the organic wastewater. Through common action of ultraviolet Fenton reaction, the manganese ferrite and the hydrogen peroxide, the advantages of the ultraviolet Fenton reaction, the manganese ferrite and the hydrogen peroxide are fully developed to obtain a good organic wastewater treatment effect; H2O2 is catalyzed by using ultraviolet light and the manganese ferrite to degrade 50mg / L of 1.2.4-acid-simulated dye wastewater, so that the degradation rate can reach 85.93%; and representation is carried out by virtue of an X-ray diffractometer, and the result shows that the crystal structure of the manganese ferrite is free of an obvious difference before and after wastewater degradation, and the effect of catalytically degrading 1.2.4-acid by the manganese ferrite is free of an obvious change after being used for multiple times.

The invention discloses a modularized photocatalytic device for organic waste gas treatment and a method. The device comprises a shell, one end of the shell is provided with a gas inlet connected with a gas inlet pipe, the other end of the shell is provided with a gas outlet connected with an exhaust pipe, and the exhaust pipe is connected with a draught fan module; the interior of the shell is sequentially divided into a pretreatment section, a main reaction section and an aftertreatment section in the direction from the gas inlet to the gas outlet, and the interior of the pretreatment section and the interior of the aftertreatment section are each provided with a spraying module; photocatalytic modules and ultraviolet lamp modules are alternately arranged in the main reaction section in the direction from the pretreatment section to the aftertreatment section. According to the treatment device and technology, the photocatalytic treatment efficiency is improved through water spraying pretreatment, the water spraying aftertreatment efficiency is improved through photocatalytic treatment, the waste gas matter can be further removed by adopting water spraying in the aftertreatment workshop section, and all the sections cooperatively act to improve the organic waste gas purifying effect.

The invention discloses a digestion-free protein product with placenta activity. The product is obtained as follows: fertilized eggs are hatched, a living embryo is used as a protein material (containing small live fish), and disinfection, shelling, crushing, blending, sterilization, ultra-long-time enzymolysis and separation for removal of insoluble matter are performed. The product is formed bycompound amino acid with dipeptide and tripeptide molecular weight between 300 DA and 500 DA and the average molecular weight being 125 DA. Science proves that only the part is digestion-free proteinand can be directly absorbed and utilized by the human body through small intestines. No digestion-free protein products are found on the market at present. The product has the benefits as follows: the digestion-free protein product is provided for old people and people with poor digestion functions, and protein balance can be kept. Three health revolutions including vaccination for smallpox, treatment of diseases caused by viruses and bacteria with penicillin and treatment with small-molecular active peptide exist in the human history. The root cause of all critical diseases is the cell faultproblem.

The invention provides a method for treating a reverse osmosis concentrated solution by using singlet oxygen produced from peroxymonosulfate under induction of inorganic solid peroxide and relates to a reverse osmosis concentrated solution treatment method. The reverse osmosis concentrated solution treatment method comprises the following steps: adding the inorganic solid peroxide and the peroxymonosulfate to the reverse osmosis concentrated solution and stirring so as to complete the reverse osmosis concentrated solution treatment. According to the reverse osmosis concentrated solution treatment method, after the peroxide is dissolved in water, released hydrogen peroxide rapidly reacts with the peroxymonosulfate to generate the high-activity singlet oxygen, and the generated singlet oxygen with strong oxidizing property can rapidly react with pollutants, oxidizes organic matters and inactivates microorganisms, thus achieving a good pollutant removal effect. As environmentally-friendly reagents, the inorganic solid peroxide and the peroxymonosulfate do not generate poisonous and harmful byproducts in the oxidative degradation process, and after the solution is treated, water can be directly discharged into a municipal sewage treatment system; and as solid reagents, the inorganic solid peroxide and the peroxymonosulfate can be directly added for use without need of additional equipment. The reverse osmosis concentrated solution treatment method has the advantages that the operation is simple and practicable and the reagents are convenient to transport and store.

Belonging to the technical field of building base materials, the invention discloses an indoor wall base bottom layer leveling mud with purification function and a preparation and construction method thereof. Leveling putty comprises the following raw materials by weight: 20-50 parts of gypsum, 5-20 parts of 200-400mesh calcium oxide, 20-50 parts of 100-200mesh quartz sand, 10-30 parts of 200-400mesh heavy calcium carbonate, 10-30 parts of 80-200mesh diatomite, 5-10 parts of 80-200mesh volcanic ash, 5-20 parts of 100-200mesh non-calcined diatomite, 1-10 parts of 100-200mesh attapulgite, 1-10 parts of 200-800mesh magnesium aluminosilicate, 0.5-10 parts of 10-30nm nano-zinc oxide, and 0.5-10 parts of 10-30nm nano-titanium dioxide, etc. The leveling mud provided by the invention has the environmental protection functions of regulating humidity and preserving heat, purifying air, decomposing formaldehyde and the like.

The invention discloses a kudzu root nanocellulose fiber-polylactic acid full-degradable plastic film. The kudzu root nanocellulose fiber-polylactic acid full-degradable plastic film is prepared from raw materials in parts by weight as follows: 0.01-2 parts of kudzu root nanocellulose fibers, 0.01-0.5 parts of polyethylene glycol, 0.01-1 part of a plasticizer, 1-3 parts of polylactic acid, 30-40 parts of an organic solvent, 0.01-2 parts of nano-titania, 0.01-2 parts of nanometer mullite powder and 0.005-0.1 parts of a coupling agent. Environment-friendly polylactic acid is taken as a matrix, and nanocrystal cellulose fibers prepared from kudzu root residues are taken as a reinforcing material of the polylactic acid full-degradable plastic film, so that the strength, the modulus, the barrier property and the like of the film can be improved; organic combination for a nanocrystal cellulose fiber, inorganic material and polylactic acid ternary system is realized technologically, and the multifunctional polylactic acid full-degradable plastic film material is prepared.

The invention discloses a planting method for greenhouse organic spinach. The method is characterized by comprising the following steps of 1, organic fertilizer manufacturing, wherein organic fertilizer raw materials are subjected to high-temperature sterilization, ammoniation treatment and dual-fermentation; 2, soil treatment, wherein organic fertilizer is applied to greenhouse planting soil, a sodium hypochlorite solution and a plant fungicide are used for performing atomization sterilization separately, and then a mixed bacterium solution is sprayed to the planting soil; 3, seed germinationacceleration, wherein spinach seeds are soaked into hot water for soaking and germination acceleration, and then soaked into the plant fungicide to be cultivated; 4, greenhouse planting, wherein germinated seeds are sown in a greenhouse seedling bed for greenhouse cultivation; 5, pest control, wherein the mixed bacterium agent and the plant fungicide are used separately for spraying every 3-4 days, and then the ozone volume concentration in the greenhouse is increased every 12-15 days.

The invention discloses a medical air purifier which comprises a machine shell, a primary filter net, an electrostatic dust collection box, a plasma catalysis net, an HEPA (high efficiency particulate air) net and a fan. An air inlet and an air outlet are horizontally arranged on the machine shell, an air flowing passage communicating the air inlet with the air outlet is arranged in the machine shell, the primary filter net, the electrostatic dust collection box, the plasma catalysis net and the HEPA net are detachably mounted in the air flowing passage along the air flowing direction and arranged vertically and parallelly, and the fan is mounted in the air flowing passage and positioned on the lower reach of the HEPA net. The medical air purifier integrates various means like deodorization and sterilization and can meet requirements of air purification of medical level.

The invention discloses a pretreatment method of waste cotton clothes, belonging to the technical field of renewable resources. The waste cotton clothes are pretreated by three steps of washing, de-coloring and disinfecting; particularly, environment-friendly and efficient reagents are used for treating the clothes in the de-coloring and disinfecting processes; and high-quality raw materials are provided and convenience is provided for post-period processing and manufacturing.

The invention relates to a foam cleaning disinfectant containing peracetic acid. The foam cleaning disinfectant containing the peracetic acid is characterized by being prepared from acetic acid, hydrogen peroxide, a surfactant and water. The invention also provides a use method and application of the foam cleaning disinfectant containing the peracetic acid. The foam cleaning disinfectant containing the peracetic acid has the advantages that the high-efficiency disinfection effect of the peracetic acid is utilized; by adding the cleaning and foaming surfactant, the widely applied foam cleaning disinfectant is obtained; compared with a soaking or spraying type disinfection method, the usage amount of the disinfectant is reduced by foam disinfection, and the foam cleaning disinfectant can be used for performing foam disinfection on equipment surfaces, inclined surfaces, channels, coarse grounds and the like; while the disinfection function is realized, the cleaning function is also realized, and the number of complicated steps is reduced.

The invention provides a ferrate pre-oxidation-bioactivity filter combined water treatment method, which comprises the following steps: firstly, adding ferrate to pre-oxidize a micro-polluted water body, wherein the adding quantity of the ferrate is controlled between 0.3mg / L and 1.5mg / L, and the pre-oxidation time is 5-30min; and enabling pre-oxidized water to flow in from the top end of bioactivity filter and flows out from the bottom end, wherein the upper layer of the bioactivity of the bioactivity filter is an active carbon layer with height of 60-80cm, and the lower layer is a quartz sand layer, and the filtration speed is 6-9m / h. the invention includes various procedures of chemical oxidization, absorption, biological oxidization and the like, is applied to the feedwater treatment without changing the traditional process and increasing large equipment, presents better organic pollutants removal property, and is a conventional pollution-removal strengthening technology which is suitable to national conditions of China and can economically improve the water quality of drink water.

The invention provides an inhibitor of pyrite and an application method thereof. The inhibitor of pyrite is prepared by mixing 2-3 percent of weight concentration of XS water aqueous solution and 4-6 percent of weight concentration of sodium ferrate aqueous solution by a weight ratio of (2-4):1. The inhibitor has the characteristics of cleanness, environmental protection, low dosage, good inhibitory effect to the pyrite and the like, is used for separating copper from sulfur and inhibiting the pyrite, and can effectively increase 6 percent of copper grade and 8 percent of copper recovery rate.

Provided in the invention is a method for utilizing ultraviolet oxidation in implementing and regulating graphene film patterning, comprising: a step 1: utilizing a xenon lamp excimer ultraviolet oxidation method and a hard mask in implementing graphene film microstructure graphic patterning; a step 2: by applying a nonuniform magnetic field in the perpendicular direction to the surface of a graphene film, controlling oxygen excitons to move in the direction of the magnetic field towards the graphene film, thus enhancing the directionality of etching the graphene film in the perpendicular direction, and increasing the quality of graphene film microstructure patterning; and a step 3: by adjusting the strength and direction of the magnetic field (such as in the horizontal direction), controlling the directionality of the movement of the oxygen excitons, and regulating the shape being etched on the graphene film graphic structure, thus achieving the goal of regulating graphene film patterning. The method of the invention implements and regulates a micrometer graphic structure array, is suitable for large-area graphene film patterning, free of photoresist contamination, and inexpensive, and provides a patterned graphene film of high quality.

The invention discloses a preparation method for special rutile titanium dioxide used for papermaking. The preparation method is characterized by comprising the following steps: 1) sanding qualified calcined sulfuric acid-process titanium dioxide from a rotary kiln, then introducing slurry with a qualified sanding particle size into a coated tank, controlling the concentration of the slurry, in terms of TiO2, to be 250 to 350 g / L and carrying out heating to 70 to 75 DEG C; 2) adjusting the pH value of the slurry with dilute sulfuric acid to 2.0 to 3.0; 3) adding a phosphoric acid solution, wherein the concentration of the phosphoric acid solution is 250 to 300 g / L, and in terms of P2O5, the addition amount of the phosphoric acid solution accounts for 1.0 to 5.0 wt% of the total amount of TiO2; 4) adding an aluminum salt solution to adjust a pH value to 6.0 to 7.5 and carrying out curing for 60 min with the pH value maintained; 5) adding the metered aluminum salt solution and a corresponding neutralizing reagent, maintaining the pH value of the slurry to be 5.0 to 6.5 and carrying out curing for 2 h after completion of addition; and 6) carrying out washing three times, flash evaporation and jet milling.

The invention relates to a VOCs catalyst for synergistic catalytic oxidation of ultraviolet-light self-excited ozone and a preparation method and application thereof. Alkali-free wax-free glass fiberis taken and cooked with a nitric acid solution, then is washed with ionized water to be neutral, and is dried; tetrabutyl titanate is used as a precursor and is mixed with anhydrous ethanol to obtaina solution A; deionized water, zirconium oxychloride and acetic acid are dissolved in ethanol, and a solution B is obtained by stirring; the solution A is evenly stirred and then the solution B is added to get a light yellow precursor C; the glass fiber is soaked in the light yellow precursor C, drying is performed after impregnation, ageing is performed at room temperature, vacuum drying is executed in a vaccum drying oven, roasting is carried out in a muffle furnace, and natural cooling is executed to room temperature to obtain Zr-Ti supported glass fiber; a solution D is obtained by mixingthe manganese nitrate, ethanol, acetic acid and deionized water; the Zr-Ti supported glass fiber is impregnated in solution D, aged, dried and roasted to obtain the VOCs catalyst for synergistic catalytic oxidation of ultraviolet-light self-excited ozone.

The invention relates to a system and method for disinfecting a soilless culture medium. The system for disinfecting the soilless culture medium comprises a drip irrigation system, a medium groove, a liquid storage pool, a liquid storage barrel and an electrolysis device. The drip irrigation system is arranged above the medium groove. The bottom of the medium groove is connected with the liquid storage pool through a liquid return pipe. Two submerged pumps are arranged at the bottom inside the liquid storage pool. One submerged pump is connected with the liquid storage barrel through a filter. The liquid storage barrel is further connected with an inlet of the electrolysis device through a booster pump. An anode liquid outlet of the electrolysis device is connected with the drip irrigation system through an anode terminal liquid return pipe and a cathode liquid outlet is connected with the liquid storage pool through a cathode terminal liquid return pipe. The invention further provides the method with the system for disinfecting the soilless culture medium adopted. According to the system for disinfecting the soilless culture medium, a disinfecting closed loop and a nutrient solution supply closed loop are obtained through a three-way valve, the automation degree is high, the energy consumption is small, pathogenic microorganism generated in the medium is thoroughly killed, occurrence and transmission of root transmission diseases can be effectively controlled, and residue and pollution are avoided.

The invention discloses a method for synthesizing a novel water purifying agent by utilizing steel acid pickling waste liquid. The method specifically comprises the following steps: (1) enabling the concentration of hydrogen ions in the acid pickling waste liquid to be not higher than 2mol / L and the total iron concentration to be not lower than 0.5g / L by adopting a physical or chemical method; (2)carrying out electrolytic treatment on the acid pickling waste liquid by taking one noble electrode as a positive electrode and the other noble electrode or an iron electrode as a negative electrode,and depositing iron ions in the negative electrode in a form of an iron element or iron compound; (3) putting the negative electrode in a strong alkaline electrolyte after depositing a certain amountof iron or iron compound on the negative electrode, carrying out electrolytic treatment by as a positive electrode, and converting iron on the positive electrode into strong-oxidation ferrate by utilizing oxidation of the positive electrode; (4) enabling the ferrate to exist in a strong alkaline solution in a form of a solute or an insoluble substance, and forming the novel water purifying agent.The method disclosed by the invention has the advantages that emission of industrial waste is reduced, the resource is saved, high-value utilization of the iron ions can be realized, and a very goodapplication prospect is obtained.

The invention discloses a method for preparing activated carbon from waste mushroom residue. The method is realized by the following ways: removing outer packaging bag of waste mushroom residue, grinding the waste mushroom residue, adding AlCl3, FeCl3 and water, uniformly mixing, slowly adding hydrogen peroxide, and drying after reaction; adding a waste mushroom residue mixture to a high pressure reactor, charring and activating through ultrasonic wave heating, filling SO3 steam, and further carrying out heating and activating; after cooling, washing activated carbon through strong brine and washing materials through de-ionized water until filtrate is nearly neutral; and finally, drying a sample in a drying oven to constant weight. The activated carbon disclosed by the invention is prepared from waste mushroom residue, so that the method not only reduces cost of preparing the activated carbon but also is of great significance in environmental protection.

The invention discloses a processing method for improving activity of a graphite felt electrode of a vanadium battery. The processing method comprises the following steps of (a) placing graphite feltin absolute ethyl alcohol for ultrasonic cleaning; (b) drying; (c) immersing the cleaned and dried graphite felt in a hydrogen peroxide solution, performing constant-temperature heating to 60-100 DEGC, heating for 1-8 hours and then drying; (d) impregnating the graphite felt dried in the step (c) in the hydrogen peroxide solution, slowly adding concentrated sulfuric acid according to a proportionthat hydrogen peroxide accounts for 10-30% of total volume, and processing for 1-8 hours; and (e) cleaning and drying the graphite felt after being processed in the step (d), wherein in the steps (c)and (d), the mass concentration of the hydrogen peroxide solution is 3-30%. By heating and pre-processing of hydrogen peroxide, the oxygen-containing functional group of the graphite felt is improved; and by immersing the graphite felt in the mixed solution of the hydrogen peroxide and the concentrated sulfuric acid, the oxygen-containing functional group of the graphite felt is remarkably improved, and the activity of the graphite felt electrode is further remarkably improved.

The invention belongs to the fields of energy materials and electrochemistry, and provides a non-crystal type manganese oxide loaded nitrogen-doped carbon-based (MnOx / NC) catalyst, and a preparation method thereof. The method comprises the following steps: an MnOx precursor and a nitrogen source are evenly mixed at a mass ratio of 1 to 1-50 and grinded to obtain a mixture; a carbon source and the mixture are evenly mixed at a mass ratio of 1 to 1-50 and grinded to obtain a composite material; and under the protection of an inert gas, the composite material is heated up to 400-1,500 DEG C for 0.1-100h of heat treatment, and is then cooled down to the room temperature to obtain the MnOx / NC catalyst. The MnOx / NC catalyst and the preparation method provided by the invention have the advantages that a preparation process is simple; an adopted Mn source can be acquired from a wide range of sources and is low in cost, and prepared MnOx is non-toxic, so that scale production is facilitated; and the prepared catalyst can catalyze oxygen electrode reactions.

The invention discloses a method for producing small molecular peptide milk and powder by taking soybeans and peanuts or single substances as raw materials. Existing peptide production adopts proteinisolate or a protein isolate preparation process by using low-temperature meal for alkali dissolution and acid precipitation to obtain pure protein; and a peptide product with high purity is producedthrough a biological enzymolysis technology. The invention simplifies a preparation process, all water-soluble nutritional ingredients such as fat, oligosaccharide and the like of soybeans and peanutsare reserved, and a plurality of enzyme formula enzymolysis processes and a short process route are adopted, so that the investment is very low, and the production cost of the product is relatively low. In addition, according to the technology, an existing enterprise production line can be kept unchanged, production of new products can be achieved only by adding an enzymolysis tank, and upgradingand updating of emerging products are achieved very easily through the biological technology. Peptides lead to human nutrition revolution in the 21st century. The small molecule active peptide is used for treating all diseases including all major diseases, i.e., cell failure problems.

The invention discloses an air purification system for a public place. The air purification system comprises an ultraviolet decomposition chamber, a plasma decomposition chamber, a catalytic reactionchamber, an adsorption chamber and a plasma generator. Through multi-level structural design, solid and liquid contaminants and germs in air are effectively cleared, meanwhile, negative ions are addedto the cleaned air, and thus the ecological level of fresh and comfortable air is achieved.