38results about How to "Developed specific surface area" 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 relates to an integrated control method for simultaneously removing respirable particle substances and heavy metal in fire coal. The integrated control method is characterized in that fly ash residual carbon having good adsorption effect on the heavy metal is sprayed in the front end of a bag type filter to remove heavy metal mercury in fire coal flue gas; meanwhile, ferrum series oxides with catalysis are sprayed in lime and the fly ash to remove sulfur oxide, and the like in the fire coal flue gas in a fluid bed reactor; filter materials of the bag filter are made of carbon-doped fibers and can effectively remove the heavy metal mercury in the fire coal flue gas for the second time, thereby achieving the aim for simultaneously removing the respirable particle substances and the heavy metal in the fire coal flue gas. The method can remove PM2.5 level, particularly finer micrometer and nanometer respirable particle substances with the removal rate up to more than 98 percent, and can remarkably control the emission of the heavy metal mercury in the fire coal flue gas; the integrated control process is simple in operation, safe in running, remarkable in environment benefit, small in occupied area of the device and low in process cost.

The invention discloses a parallel adjustable grid eyeshield privacy protecting adhesive film which comprises a surface layer, a middle main film and a bottom layer. The surface layer is a polyethylene layer, the bottom layer is a polyethylene layer, and the middle main film comprises an upper layer, a middle layer and a lower layer, wherein the upper layer is a polyethylene terephthalate layer, the lower layer is a polyethylene terephthalate layer, and the middle layer is an active carbon fiber layer. The protecting adhesive film adopts a screen privacy dark technology and can prevent confidential information from being revealed and lead a screen to be only browsed by a front person, and other persons can only view a dark picture at both sides; a visual range of an LCD screen is limited in a certain range (preferably 60 degrees), the picture can be clearly viewed in the right side, but can not be viewed at both the left side and the right side, and the privacy performance is improved on the basis of original scratch, corrosion, glare and radiation resistance.

The invention belongs to the field of batteries, and particularly relates to an optimized thin-type and an electrode-tube-type seal power lead-acid storage battery. The optimized thin-type and the electrode-tube-type seal power lead-acid storage battery comprises a positive electrode plate and a negative electrode plate, wherein the positive electrode plate is made of a rare earth alloy, the negative electrode plate is prepared from the following raw materials: lead powder, barium sulfate, humic acid, complex tannin extract, carbon black, ion exchange water and vitriol. The invention also provides a preparation method of the optimized thin-type and an electrode-tube-type seal power lead-acid storage battery. The preparation method comprises the following steps: melting the rare earth element into the lead so as to prepare a positive plate grid, enabling a sheath and a dacron calandria to sleeve the grid, then filling the powder, smashing an upper back cover, soaking, solidifying and drying, so as to prepare the positive electrode plate; and after preparing the positive electrode plate and the negative electrode plate, assembling and forming the positive electrode plate and the negative electrode plate into a finished battery. The rare earth alloy is adopted by the positive electrode plate, so that the mechanical strength of the grid and the corrosion resistance of the grid are improved, the service life of the battery is prolonged, the complex formula of the negative electrode plate is used for improving the battery active substance use ratio and the battery capacity, and the low-temperature discharge performance of the battery is enhanced.

The invention discloses an integrated PtCu/carbon nanofiber catalyst layer, a preparation method thereof and an application thereof in a fuel cell. The preparation method of the integrated PtCu/carbonnanofiber catalyst layer comprises the following steps: obtaining a nano polymer fiber membrane through electrostatic spinning, carrying out heat treatment on the nano polymer fiber membrane to obtain a carbon nanofiber membrane, depositing copper nanocrystals on the carbon nanofiber membrane through a pulse electrodeposition method, alloying the copper nanocrystals through an in-situ replacementmethod, and obtaining a PtCu alloy/carbon nanofiber film; soaking the PtCu alloy/carbon nanofiber film in a perfluorosulfonic acid resin solution, and adhering the PtCu alloy/carbon nanofiber film toa proton exchange membrane for mould pressing and curing to obtain the PtCu/carbon nanofiber catalyst layer. The preparation method has the advantages of being efficient, low in cost and environmentally friendly, the obtained integrated PtCu/carbon nanofiber catalyst layer is high in catalytic activity and good in stability, the problems of falling and uniformity of materials in the using processcan be avoided, and meanwhile the membrane electrode assembling efficiency is improved.

The invention discloses a preparation method for a para-aminophenol ordered mesoporous carbon catalyst. The preparation method is characterized in that chitosan is taken as a raw material, and non-precious metal compounds are used as a doping source, meanwhile, a triblock copolymer surfactant is added, after performing self-produced high pressure treatment under a high temperature hydrothermal condition, filtering is performed so as to obtain a dark brown solid product, the solid product is dried, ground, and then put into a tubular calcinator, and high temperature carbonization under inert gas atmosphere protection is performed, so as to obtain a high-stable metal-doped carbon-based catalyst with different ordered mesoporous structures. The catalytic efficiency of the high-stable metal-doped carbon-based catalyst for para-nitrophenol hydrogenation catalysis generating para-aminophenol is investigated. The operation process has the main characteristics that the biomass resource chitosan is used as a raw material and is environmentally friendly, cheap and available; the surfactant is added, so that the formation of the ordered mesoporous structure is effectively controlled, the effective contact area between the reactant and the catalyst is increased, and the reaction conditions are mild; an active center and a carbon material are generated simultaneously, so that the structureis more stable, and the reaction process operationis simple.

The invention discloses polyvinyl chloride with good thermal stability. The polyvinyl chloride with good thermal stability comprises the following raw materials in parts by weight: 40-70 parts of polyvinyl chloride, 5-10 parts of polystyrene, 10-25 parts of polymethyl methacrylate, 0.5-1.5 parts of polyethylene wax, 0.4-0.8 part of rare earth metal compound, 1-2 parts of chlorinated paraffin, 0.5-1 part of maleic anhydride-grafted ethylene propylene diene monomer rubber, 0.2-0.8 part of dibutyl tin dilaurate, 0.2-0.6 part of dodecenylsuccinic anhydride, 0.5-1.5 parts of dicumyl peroxide, 1-4 parts of vermiculite power, 6-10 parts of talcum powder, 0.5-2 parts of precipitated barium sulphate, 5-9 parts of nylon fiber, 4-8 parts of mica powder, 6-10 parts of calcium silicate, 8-12 parts of composite carbon, 2-4 parts of a titanate coupling agent, 0.5-1.5 parts of an antioxidant, 0.5-1 part of an lubricant and 0.5-1.5 parts of a light stabilizer.

The invention provides a Mn-loaded TiO2-doped activated carbon fiber air purifier filtering net, which comprises the following materials in parts by weight: 8-10 parts of bentonite, 5-8 parts of Mn-doped TiO2, 20-22 parts of activated carbon powder, 0.5-1 parts of nano-silver, 15-20 parts of epoxy resin crosslinker, and 60-75 parts of activated carbon fiber. In the filtering net disclosed by the invention, Mn is doped into titanium oxide to improve photon utilization rate during reaction, Mn-doped TiO2 and other material are together loaded on activated carbon fiber, and the adsorptive action of the porous structure of the activated carbon fiber is utilized to enhance the air purification effect.

The invention discloses a waterproof anti-aging polyethylene plastic which is prepared from the following raw materials in parts by weight: 20-50 parts of polycarbonate, 15-35 parts of polyethylene terephthalate, 10-20 parts of polyethylene, 1-3 parts of n-butyl 4,4-bis-(tert-butyl-peroxy)valerate, 0.5-1 part of 4,4'-diamidodicyclohexyl methane, 1-2 parts of potassium dichromate, 2-6 parts of composite carbon, 0.5-1.5 parts of silane coupling agent, 10-18 parts of zinc borate, 2-8 parts of ground calcium carbonate, 1-5 parts of muscovite, 1-6 parts of calcium silicate hydrate, 1-5 parts of meerschaum, 1-4 parts of aluminum tripolyphosphate, 0.5-1.5 parts of molybdenum disulfide, 1-3 parts of trimethyl phosphate, 0.1-0.6 part of rare earth compound, 1-2 parts of ethylene glycol monobutyl ether, 1-2 parts of lubricant, 1-3 parts of antioxidant and 1-3 parts of light stabilizer.

The invention belongs to the field of nanofiber membranes, and relates to an ethylene urea/polyacrylonitrile formaldehyde-removing nanofiber membrane prepared by an electrostatic spinning method as well as a preparation method and application of the ethylene urea/polyacrylonitrile formaldehyde-removing nanofiber membrane. The preparation method comprises the following steps: (1) adding dried polyacrylonitrile and ethylene urea into N-N dimethylformamide, and stirring to obtain an electrostatic spinning solution; and (2) performing electrostatic spinning on the electrostatic spinning solution in the step (1) to obtain a nanofiber membrane, and then drying the nanofiber membrane to remove the solvent to obtain the ethylene urea/polyacrylonitrile formaldehyde-removing nanofiber membrane. An electrostatic spinning method and a chemical formaldehyde purification method are combined, and the nanofiber with the efficient formaldehyde purification function is prepared by utilizing the advantages that polymer superfine fibers are convenient to form and can adsorb formaldehyde gas, increase the concentration of the formaldehyde gas around ethylene urea and improve the catalytic efficiency due to the relatively high specific surface area.

The invention provides a water purifying device for a shower device. The water purifying device has the advantages that the water purifying device can be fast mounted on an existing shower device in aDIY manner without changing the other structures of the shower device, the water purifying material used by the water purifying device can effectively remove harmful elements and impurities in water,release various trace elements beneficial to human bodies and effectively inhibit bacterium breeding and is good in self-cleanliness state, nontoxic and odorless, free of foreign matter falling, freeof secondary pollution, small in volume density, large in specific surface area and unique in surface features.

The invention discloses a heat-insulation waterproof roll for roofs and a preparation method thereof. The heat-insulation waterproof roll is prepared by bonding the upper face and the lower face of a heat insulation layer to a waterproof layer through a binder, the heat insulation layer is high in porosity and small in volume density and has a developed specific surface area, and therefore the prepared waterproof roll has a good heat-insulation effect; aluminum hydroxide reacts with phosphoric acid to form a phosphate solution, the phosphate solution is blended with polyurethane to obtain a binder, the binder contains a large amount of phosphate, the phosphate has a certain binding effect, and meanwhile the surface of the heat insulation layer contains a large amount of nano titanium dioxide, one phenolic hydroxyl group on a catechol group in the binder is chelated through nitrogen atoms and peroxide atoms and active hydroxyl groups on the surface of titanium dioxide, the other hydroxyl group and adjacent catechol form hydrogen-bond interaction, and the binder and active hydroxyl groups on the surface of a glass fiber felt in the waterproof layer are chelated; and the heat insulation layer and the waterproof layer are tightly bonded.

The invention belongs to the field of nanofiber membrane preparation, and relates to a TiO2/ethylene urea/polyacrylonitrile formaldehyde removal nanofiber membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: drying a polyacrylonitrile raw material, adding the dried polyacrylonitrile raw material and ethylene urea into N-N dimethylformamide, stirring until complete dissolution, adding nano titanium dioxide, and carrying out ultrasonic dispersion to obtain a spinning solution; and performing electrostatic spinning on the spinning solution to obtain a nanofiber membrane, and drying to remove the solvent to obtain the TiO2/ethylene urea/polyacrylonitrile formaldehyde-removing nanofiber membrane. According to the invention, photocatalytic formaldehyde-removing substance TiO2 nanoparticles, a formaldehyde chemical trapping agent and a polymer polyacrylonitrile are compounded, then an electrostatic spinning method is adopted to prepare the formaldehyde-removing functional superfine fiber, and the high specific surface area of the superfine fiber is utilized to adsorb free formaldehyde gas in the air; the concentration of the formaldehyde gas around the TiO2 nanoparticles and the formaldehyde chemical trapping agent is increased, the formaldehyde removal efficiency is improved, and the polymer fibers are good in flexibility and wider in application range.

The invention provides mesoporous activated carbon. The mesoporous activated carbon is obtained by activating an activated carbon raw material through a template method and an alkali activation method. An activated carbon material is prepared by using a combination of the template method and the chemical alkali activation method; a template agent is added in the process of preparing the activatedcarbon through chemical activation; a carbon source generates a large number of holes in alkali-activated pore-forming process, and an alkali activator can etch and remove the template agent in the high-temperature pore-forming process so as to allow a large number of nanometer pore diameters similar to the particle size of the template agent to be generated; and a part of mesopores become macropores due to the etching effect of alkali. According to the invention, the specific surface area of the activated carbon can be adjusted according to the proportion of the activator, an independent activating process is not needed, complex technological processes are reduced, the template does not need to be removed through hydrofluoric acid, environmental pollution is reduced, and production is facilitated. The mesoporous activated carbon provided by the invention has developed mesopores and larger specific surface area; preparation process is simplified; cost is reduced; environmental protection is realized; and the mesoporous activated carbon is more suitable for popularization and application in industrial large-scale production.

The invention discloses a water-cooling type compressor for shale gas recycling. The water-cooling type compressor for shale gas recycling comprises a compression device and an oil-gas separation device. The compression device comprises a support base. A water cooling box is fixedly connected to the upper surface of the support base. The water cooling box is internally filled with thermal insulation cotton. A gas storage tank is mounted inside the water cooling box. A gas outlet pipe is connected to the right side wall of the gas storage tank in an inlaid manner. The oil-gas separation devicecomprises a cylinder body. A piston cylinder is in clearance connection to the inner side wall of the cylinder body. A crankshaft is mounted at the right side of the outer side wall of a piston rod and penetrates the right side of the outer side wall of the cylinder body. The other end of the crankshaft is provided with a crankshaft connecting rod. The other end of the crankshaft connecting rod isprovided with a second motor. A gas inlet valve is mounted at the left side of the outer side wall of the cylinder body. The gas outlet pipe communicates with the gas inlet valve. By means of the water-cooling type compressor for shale gas recycling, synchronous or continuous compression and separation can be achieved; the shale gas recycling efficiency can be greatly improved; the cost is lowered; safety and reliability are achieved; and the water-cooling type compressor can operate for a long time.