57results about How to "Well-developed structure" patented technology

The invention discloses a preparation method of porous graphene. The method comprises the steps of: (1) stripping graphite oxide in a water/ethanol mixed solution with pH of 9-10, adding a chemical foaming agent and mixing them uniformly, carrying out filtering and drying to obtain a solid mixture; (2) placing the mixture in a reducing atmosphere, and performing heating expansion reduction to obtain expanded graphene; (3) blending the expanded graphene with strong base, and conducting high temperature activation; and (4) washing the product with hydrochloric acid and deionized water, and performing drying so as to obtain porous grapheme. The porous graphene prepared by the method involved in the invention has a specific surface area up to 2075m<2>/g, a pore volume up to 1.8cm<3>/g, and an average pore size of 1-7nm. As a supercapacitor electrode material, the specific capacitance can reach 155F/g under a current density of 1Ag<-1>. As a porous graphene electrode, the specific capacitance can reach 84.4% along with the increase of current density from 0.2Ag<-1> to 20Ag<-1>. The porous graphene has high specific capacitance and cycle stability. The preparation method disclosed in the invention has the advantages of simple process, low cost, and easy scale production.

The invention discloses a 40-thousand-ton hard carbon black reaction furnace and a production process of carbon black. The carbon black reaction furnace comprises a combustion chamber, a venturi tube, a reaction chamber, and a quench zone. The uniquely designed combustion chamber of the reaction furnace ensures that the distribution of the temperature field of the carbon black production is more reasonable, the appropriate angle, length and inner diameter of the venturi tube ensure that raw oil is fully vaporized and sheared on the venturi tube part; and the reasonably designed reaction section and the matched quench zone ensure that the carbon black cracking reaction can be performed quickly, and the side reaction can be inhibited. Coal gas or natural gas is used as a fuel, the range of the raw oil is wider, the production capacity of the carbon black is high, unit consumption is low, a small amount of polluted product is discharged and the quality of the carbon black is high.

The invention discloses a method for realizing carbon coating of lithium iron phosphate through radio frequency plasma enhanced chemical vapor deposition. The method comprises the following step of: putting lithium iron phosphate into a reaction chamber to make the lithium iron phosphate react for 15-60min in reactant gas under radio frequency plasma, wherein the total air pressure of the reaction chamber is maintained to be 8-30 Pa, the output power of the power supply of the radio frequency plasma is 40-100W, and the reactant gas is acetylene or the mixed gas of hydrogen and methane with a volume ratio of 1:1. A carbon-coated film generated by utilizing the method has the advantages of uniform component and easy control of the thickness as well as low temperature and short reaction timecompared with the carbon-coated film generated by utilizing the conventional chemical vapor deposition. A prepared carbon-coated LiFePO4 material has good crystal structure growth, no impurity phase in an XRD (X-Ray Diffraction) testing result, large specific capacity and excellent multiplying power performance and cycle performance. When the material forms a button type with metal lithium to simulate a battery test under the conditions of 0.5C and 1C, the discharge capacities for the first time are respectively 166.0mAh.g<-1> and 165mAh.g<-1>, and the capacity retention rates after 50 cyclesare respectively 99.5 percent and 99.3 percent.

A jute stalk modified active carbon is prepared by the following raw materials by weight: 130-150 parts of jute stalk, 4-6 parts of zeolite, 7-9 parts of silica gel, 10-15 parts of active carbon fiber, 7-9 parts of palygorskite, 7-9 parts of bentonite, 6-8 parts of polyacrylic acid, 8-10 parts of humic acid, 4-5 parts of rectorite, 4-5 parts of modified diatomite, and a proper amount of water. The jute stalk is used as a raw material to make the produced active carbon have advantages of developed aperture structure, big specific surface area, high adsorption speed, and good adsorption capability for various solutes and free gasses; silica gel is used to make the active carbon have advantages of large adhesion stress and difficult disintegration; active carbon fiber is matched to use to make the active carbon have strong absorption function; and an adsorption value and a methylene blue absorption valve of the active carbon greatly exceed standard values of the national wood water purification first-level active carbon, and the invention develops new raw materials for manufacturing the active carbon.

The invention discloses a method for planting lycium ruthenicum in saline-alkali soil and improving soil and fertilizer statuses. The method comprises the steps: improving fertilizer addition and landpreparation; ridging; timely seeding; field management; shape pruning; and harvesting and processing, wherein an improving fertilizer comprises desulphurization gypsum, activated carbon, coal ash, poultry excrements, zeolite, potassium feldspar, felt fiber and blast furnace slag particles which are in the weight ratio: (40-50):(10-14):(8-12):(8-12):(4-8): (4-8):(4-8):(4-6). In the method, the lycium ruthenicum is planted by improving the saline-alkali soil by using the improving fertilizer and a drip irrigation system, the survival rate and yield of the lycium ruthenicum are high, the effecton improving the whole saline-alkali soil is remarkable, and the improving process is green, environment-friendly and pollution-free. Therefore, the method is an application technology worthy of beingpopularized on a large area.

The invention discloses nitrogen-rich hierarchical pore biomass charcoal and application thereof, and belongs to the technical field of environment-friendly functional carbon materials. The inventionaims to solve the problems of low nitrogen content, underdeveloped pore structure and the like of the existing nitrogen-doped biomass charcoal. The preparation method comprises the following steps: putting biomass and carbon nitride into a carbonate aqueous solution, uniformly stirring and mixing, drying, heating a dried material to 800-900 DEG C in an inert atmosphere, calcining, washing a calcined product, and drying to obtain a finished product. Nitrogen-rich carbon nitride is adopted as a nitrogen doping agent, high-nitrogen-content doping is realized, and an activator carbonate is added,so that the pore structure of the biomass charcoal is effectively improved, and the biomass charcoal has good low-temperature hydrogen sulfide removal performance.

The invention relates to a resource recycling method of a waste polymeric microfiltration/ultrafiltration membrane, and aims to solve the problem that environmental pollution is caused due to improper treatment of waste polymer microfiltration/ultrafiltration membranes. The method comprises steps as follows: step one, the waste filtration membrane is cleaned and dried; step two, a polymer solution is prepared; step three, a polymeric absorption resin particle suspension liquid is prepared; and step four, the polymeric absorption resin particle suspension liquid is post-processed, and polymeric absorption resin particles are obtained. According to the method, the waste filtration membrane is taken as a raw material, and polymeric absorption resin is prepared with a nonsolvent-induced phase separation method, so that harmless treatment and resource recycling of the waste filtration membrane are realized, and the method has good environmental benefits and economic benefits. The method is applied to the field of water treatment, chemical engineering and the like.

The invention discloses nitrogen-rich biomass-based activated carbon with a hierarchical pore microchannel structure and application thereof, and belongs to the technical field of porous carbon materials. In order to solve the problems of low nitrogen doping amount, microchannel structure damage and the like in the existing nitrogen-doped activated carbon, the invention provides nitrogen-rich biomass-based activated carbon with the hierarchical pore microchannel structure, and the preparation method of the nitrogen-rich biomass-based activated carbon with the hierarchical pore microchannel structure comprises the following steps: uniformly mixing biomass, melamine cyanurate or a mixed nitrogen source thereof and an activating agent in water, drying, grinding and sieving, and heating to 650-950 DEG C in an inert atmosphere, calcining, washing and drying to obtain the product. The nitrogen-rich biomass-based activated carbon with the hierarchical pore microchannel structure has the characteristics of high specific surface area, high total pore volume, hierarchical pore structure, high nitrogen content, high surface nitrogen content, low activator dosage, low micropore rate and the like, and has excellent desulfurization and decarbonization performance.

The invention belongs to the technical field of sewage treatment, aims to solve the problems of resource waste, high cost of activated carbon applied to wastewater treatment and the like in treatmentof municipal sludge and coal gangue at present, and provides coal gangue sludge-based activated carbon as well as a preparation method and application thereof in mediation and enhancement of anaerobicdigestion of sewage. The method comprises the following steps: respectively grinding and crushing municipal sludge and coal gangue, uniformly mixing, adding a ZnCl2 activating agent, dipping, drying,heating, activating, soaking with hydrochloric acid, and drying to obtain the coal gangue sludge-based activated carbon. The coal gangue sludge-based activated carbon is applied to anaerobic digestion treatment of organic wastewater. Through activation, rich porous structures are formed on the surface of the coal gangue sludge-based activated carbon, functional groups are also changed, and the accumulated gas production rate in the anaerobic reaction process can be remarkably increased. The instantaneous adsorption effect of sludge on organic matters can be weakened, the acid stress phenomenon in the reactor is effectively relieved, and the stability of an anaerobic digestion system is enhanced.

The invention provides a method for rapidly preparing porous magnetic active coke based on dewatered sludge. The method includes the steps: drying the dewatered sludge by air and crushing the dewatered sludge into sludge particles; placing the dried sludge particles into a stainless steel reactor, adding distilled water, sealing the stainless steel reactor, performing magnetic stirring and performing reaction after heating; performing cooling, cleaning and vacuum filtering after reaction to obtain a precursor product; immersing the precursor product into activating agent and catalyst solution,performing sealing and vibrating after immersion, performing vacuum filtering, and performing heating and reaction after air drying; cooling, cleaning and drying the solution to obtain the porous magnetic active coke. The method is simple and rapid in technological process, good in safety, mild in reaction and low in energy consumption, the prepared active coke is developed in porous structure, has good magnetism, is easily recovered and recycled, can be widely applied to waste water and waste gas treatment and has remarkable economic and environmental benefits, and the field of sludge recycling is greatly widened.

The invention belongs to the field of white carbon black, and discloses a preparation method of hydrophobic white carbon black with controllable particle size and a core-shell structure. The preparation method disclosed by the invention comprises the following steps of: preparing a sodium silicate solution, adding an acid catalyst into the sodium silicate solution, adjusting the pH value of an obtained system to be 10 to 10.5, reacting for 20-35 minutes, continuously adding the acidic catalyst, regulating the pH value of the system to 3.5-4.6, reacting for 40-60 minutes, adding a hydrophobic modifier, adding a cosolvent, reacting for 1-12 hours at 50-80 DEG C, and carrying out filter pressing, washing and drying to obtain the hydrophobic white carbon black with the core-shell structure. According to the preparation method, the number of hydroxyl groups on the surface of the white carbon black is reduced through a co-condensation method of the white carbon black and the hydrophobic modifier, and aggregation of the white carbon black in the drying process is reduced, so that the preparation of the white carbon black with controllable particle size, good hydrophobicity, high specificsurface area and high oil absorption is realized.

The invention discloses active brown coal and a preparation method thereof. Technical indicators of the active brown coal are as follows: an iodine value ranges from 300mg/g to 600mg/g; stacking density ranges from 450kg/m<3> and 700kg/m<3>; a phenol value is more than 100%; a PH value ranges from 6 to 9; a macropore ratio ranges from 80% to 90%; and granularity Dmax is less than 1mm. The preparation method comprises the following steps that: raw coal of the brown coal is crushed and screened, and particles after crushing and screening are subjected to integration processing of carbonization, oxidization and activation, then cooled and finally sealed and packaged. The active brown coal preparation method is simple; the prepared active brown coal has the advantages of being stable in property, developed in macropore structure, applicable to adhesion, auxiliary vitality and growth of microorganisms, rich in surface chemical functional group, high in catalytic activity and low in cost; and the prepared active brown coal can be adopted as a substitute of the conventional active carbon to be used in the sewage treatment field and solves the problem that the conventional active carbon is poor in bioactivity and high in cost when being used in the sewage treatment.

The invention discloses a bio-based photothermal conversion material and a preparation method and application thereof, and belongs to the technical field of solar photothermal conversion. The invention aims to solve the technical problems of complex preparation method and high cost of an existing photothermal conversion material. The bio-based photothermal conversion material is prepared by the following steps of: ultrasonically treating shaddock peel with absolute ethyl alcohol, cleaning, drying, uniformly coating the surface with a dispersion liquid and curing. The preparation method specifically comprises the following steps of: 1, putting shaddock peel into absolute ethyl alcohol for ultrasonic treatment, then repeatedly washing with deionized water until the ethyl alcohol is completely removed, and then drying; 2, uniformly mixing acetone and absolute ethyl alcohol, then adding epoxy resin, a dispersing agent and carbon black, and sanding until the mixture is uniformly dispersed to obtain a dispersion liquid; and 3, uniformly coating the dispersion liquid obtained in the step 2 on the surface of the shaddock peel treated in the step 1, and curing to obtain the bio-based photothermal conversion material. The material is used for sewage treatment and seawater desalination.

The invention discloses blood pressure lowering health care green tea and its preparation method. The method comprises: mixing 15-30 parts by weight of white tea, 20-25 parts by weight of zinc-selenium tea, 20-25 parts by weight of green tea, 20-30 parts by weight of baked green tea or Maofeng tea, 5 parts by weight of folium llicis latifoliae, and 5 parts by weight of chrysanthemums, wherein, the free amino acid content of the white tea is over 7%, the zinc-selenium tea has Zn content of 80-120mg/kg and Se content of 0.25-0.35mg/kg, the green tea has free amino acid content of more than 5%, and the baked green tea or Maofeng tea has tea polyphenol content of over 30%; then mixing the well mixed tea with crushed kenaf accounting for 20-30 wt% of the mixed tea uniformly, and storing the mixture for 30-60d, then conducting screening to filter out kenaf, and carrying out fragrance increasing at a temperature of 150DEG C for 10-12min, and performing depilation at a temperature of 110DEG Cfor 12-15min, thus obtaining the product. With high content of water extract, tea polyphenol and amino acid as well as low caffeine, the health care green tea of the invention plays an active role inprotecting a normal ultrastructure of the cardiac muscle.