68results about How to "High specific area" patented technology

The invention discloses a composite light structure with a high energy absorbing rate and good buffer ability and a structure main body. The composite light structure with the high energy absorbing rate and good buffer ability comprises a housing and an inner support, wherein the housing is sealed and hollow; the inner support is connected in the housing; the inner support is of a dot matrix structure; the inner support comprises a plurality of unit cells which are arranged according to a preset rule; and each cell unit is in the shape of a framework comprising a plurality of supporting rods. The composite light structure with the high energy absorbing rate and good buffer ability and the structure main body disclosed by the invention have the characteristics of relatively small weight, relatively high specific areas, strong energy absorbing ability and relatively strong buffer ability.

The invention discloses a method for preparing a porous ceramic material for adsorbing heavy metals. The method comprises the following steps: (1) preparing pug; (2) preparing a phosphorous compound solution: dissolving 20-40 parts (by weight) of phosphorous compound in 30-60 parts (by weight) of water so as to obtain the phosphorous compound solution; (3) carrying out milling: adding the phosphorous compound solution prepared in the step (2) into the pug prepared in the step (1), and carrying out milling for 20 to 30 minutes by using a mixing mill; (4) carrying out ceramic green body forming; (5) carrying out ceramic green body drying; and (6) carrying out ceramic green body burning. The porous ceramic material for adsorbing the heavy metals, prepared by the method, has the advantages of porosity, high specific area, high mechanical strength, high physical adsorptivity, high chemical adsorptivity and wide chemical adsorption adaptability.

The invention discloses a method for preparing a nano mesoporous carbon microsphere-graphene sandwich composite material, graphene oxide is dissolved in a solvent A to obtain a graphene oxide dispersion; a structure directing agent is dissolved in a solution B, then a carbon source is added for full reaction to obtain a mesoporous carbon precursor mixed liquid; the graphene oxide dispersion is added into the mesoporous carbon precursor mixed liquid for reaction to obtain a complex; and the complex is successively aged and carbonized. The nano mesoporous carbon microsphere-graphene sandwich composite material with a high specific surface area, uniform morphology and a controllable pore structure can be prepared by the method at low temperature, according to actual needs, the amount of the structure directing agent and the carbon source can be adjusted for control of the pore structure. Equipment needed in the method is simple, and the method is short in cycle, simple in process and low in cost.

The invention provides a foaming polyvinyl formal microbial carrier and a preparation method thereof. The preparation method comprises the following steps of placing starch and a PVA (Polyvinyl Alcohol) water solution into a water bath at 90 DEG C, mechanically stirring till dissolution, and then adding glycol and 4-5 mol/L of sulfuric acid; step 20, uniformly stirring the solution at 60-80 DEG C, slowly adding formaldehyde, adding a carrier elasticity reinforcing agent, fast increasing the stirring speed to 450-700 rpm, and controlling reaction time to 20 minutes to form a foam solution; pouring the foam solution into a mould, and reacting under the condition of 60-80 DEG C for 18-22 hours to obtain the foaming polyvinyl formal microbial carrier. The foaming polyvinyl formal microbial carrier provided by the invention has the advantages of good elasticity, good hydrophilicity, large specific area, high porosity, high biological binding force and the like.

Provided is a preparation method of SiOC ceramic aerogel. The invention relates to an aerogel material preparation technology, in particular to a preparation method of the SiOC ceramic aerogel. The problem that for an existing method for preparing the SiOC ceramic aerogel, the aperture is difficult to control is solved. The method comprises the steps that hydrogen-containing polymethylsiloxane, 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane, chloroplatinic acid and acetone are mixed to be uniform and then put into a hydrothermal reaction kettle for reacting, and gel is obtained; the gel is soaked with acetone and ethyl alcohol in sequence, supercritical drying treatment is conducted, the temperature is increased to 700 DEG C to 1,300 DEG C under a nitrogen or argon atmosphere, heat preservation is conducted for 1 h to 3 h, natural cooling is conducted to room temperature, and the SiOC ceramic aerogel is obtained. The SiOC ceramic aerogel has the advantages of being high in specific surface area, narrow in pore diameter distribution, stable in structure and stable in temperature resistance and oxidation resistance and can be applied to the fields of thermal insulation, energy storage and the like.

The invention discloses Fe-doped walnut shell activated carbon for treating dye wastewater as well as a preparation method and an application of the activated carbon. The Fe-doped walnut shell activated carbon takes walnut shells as a raw material and is prepared through acid solution treatment, inorganic salt treatment, pyrolysis treatment, activating treatment and high-temperature heat treatment. The Fe-doped walnut shell activated carbon has the Fe content of 2.15%(wt%), the specific surface area of 1779.31 m<2>/g, the maximum adsorption of 531.08 mg/g for methylene blue as well as the adsorption exceeding 500 mg/g for other dyes including methyl orange, malachite green and methyl red. The Fe-doped walnut shell activated carbon is high in adsorption capacity, high in adsorption speed, easy to recycle and reusable, and the treatment cost is greatly saved. Meanwhile, according to the method, the waste walnut shells are taken as the raw material, operation is convenient, the cost is low, secondary pollution cannot be caused, and agricultural waste is recycled.

The invention discloses a catalyst prepared by using an aryl-containing s-triazine cyclic polymer as a precursor. The catalyst is prepared according to the following steps of 1), adding an aryl-containing s-triazine monomer into a polymerization catalyst, uniformly dispersing the aryl-containing s-triazine monomer, sealing a tube, making an obtained mixture react at a heating temperature, completing a reaction, and washing and drying a reaction product, so as to obtain the aryl-containing s-triazine cyclic polymer; 2), carrying out heat treatment on the aryl-containing s-triazine cyclic polymer in an inert atmosphere, so as to obtain the catalyst prepared by using the aryl-containing s-triazine cyclic polymer as the precursor. The invention also provides a preparation method and application of the catalyst. The catalyst provided by the invention is higher in catalytic activity, low in cost and simple in preparation process, and further, has high activity and high stability.

The invention relates to a portable adsorption type natural gas recovery device and method. The device consists of a gas collecting module, a machine pump module, an adsorption module and a control module, wherein each of the modules comprises a natural gas bottle or an LNG bottle, a gasifier, a buffer tank, a vacuum pump, a natural gas compressor, an ANG bottle, a control cabinet, a pressure, temperature and oxygen detecting probe and various valves; main body equipment of the device is mounted on a gasifier prying block, a buffer tank prying block, a vacuum pump prying block and a compressor prying block; the prying blocks are in bolt connection, so that in-site assembled prying can be convenient to perform, and a vehicle-mounted natural gas recovery device can be made, so that the movement and the operation are convenient. The ANG bottles can be demounted, and replaced, and system operation is not influenced. The device is provided with a vacuum system for vacuumizing the system. According to the portable adsorption type natural gas recovery device and the method disclosed by the invention, natural gas exhausted from the natural gas bottles or the LNG bottles is collected to the gasifier and the buffer tank; a compressor is used for compressing the natural gas through medium pressure into the ANG bottles to be stored, so that recovery is realized. When being required by outside, gas in the bottles can realize desorption for use of energy resources.

The invention relates to a movable skid-mounted combined adsorbent local desorption regeneration device. The device comprises a "microwave and vacuum" desorption module, a condensation module, a recovery module and a control module; and the "microwave and vacuum" desorption module is suitable for integrally desorbing an adsorbent transported by an adsorbent conveying device to generate an oil-gasmixture and the adsorbent; the condensing module is suitable for collecting the oil-gas mixture and condensing the oil-gas mixture to generate oil and gas; the recovery module is suitable for collecting and respectively recovering the oil and gas; and the control module is suitable for controlling "microwave and vacuum" desorption, the condensation module and the recovery module. The device realizes the desorption of the adsorbent to prevent environmental pollution; and the four modules are placed in a corresponding skid, so the device can be locally mounted, and is easy to transport.

The invention discloses a graphene-TiO2 nanotube hydrogel, a preparation method, and an application thereof. The preparation method includes the steps of: (1) adding water to graphene oxide to fully dissolve the graphene oxide to obtain a graphene oxide water solution; (2) adding the TiO2 nanotube to the graphene oxide water solution with full stirring to prepare a graphene-TiO2 nanotube solution; (3) preparing a FeSO4 water solution; (4) adding the FeSO4 water solution to the graphene-TiO2 nanotube solution with uniform mixing to obtain a mixed liquid; (5) performing self-assembly to the mixed liquid in the step (4) under a water bath environment to obtain the graphene-TiO2 nanotube hydrogel. The preparation method is simple and employs easy-to-obtain raw materials. During synthesis, the method abides by the principle of green chemistry and is free of catalysts and toxic solvents, so that the hydrogel is toxic-free. The hydrogel can be industrially produced and can effectively remove antibiotics from waste water.

The invention discloses a device and method for synchronous desulfurization and denitrification of flue gas. The method comprises the following steps: a porous filler is put in a box-shaped plate frame to be used as a gas-permeable absorption and reaction medium, a washing absorption liquid containing polyethylene glycol and manganese oxide is added into a flue gas pipeline by using a spraying mode, the washing absorption liquid forms a liquid film on the surface of the filler, and the manganese oxide in the washing absorption liquid converts NO and SO2 in the flue gas into a nitrate and a sulfate, respectively. After the flue gas is treated by the device and method for synchronous desulfurization and denitration provided by the invention, the SO2 removal rate is maintained at 95% or more,the NO removal rate is maintained at 80% or more, and the reaction product can be separated and utilized; and the equipment is simple, the operation costs are low, and the device and the method havevery good prospects.

The invention discloses a preparation method of a low-overpotential cobalt-based composite electrolyzed water oxygen evolution catalyst. The method comprises the following steps: (1) adding a polymerinto a solvent to form a mixed solution, adding a cobalt-based metal organic framework (MOF) to prepare a solution, and preparing a fiber film I from the solution by taking carbon paper as a substratethrough electrostatic spinning; (2) calcining the fiber film I in a nitrogen or argon atmosphere, so as to obtain a precursor II; and (3) calcining the precursor II, so as to obtain the low-overpotential cobalt-based composite electrolyzed water oxygen evolution catalyst. The overpotential of the catalyst is only 260mV when the alternating current density is 10mA/cm<-2>, and the catalyst is an electric catalyst with relatively low overpotential in cobalt-based electric catalysts. Meanwhile, the preparation method of the low-overpotential cobalt-based composite electrolyzed water oxygen evolution catalyst has the beneficial effects that the process is simple, safe and controllable, and the consumed time and energy are little.

The invention relates to the technical field of catalysts, provides a preparation method of a porous rod-like Co/C nanorod composite material, aims at the problem of high cost of a noble metal doped modified electrocatalyst, the preparation method comprises the following steps: preparing a precursor by utilizing NTA and Co (NO3) 2.6 H2O hydrothermal method, calcining the precursor, calcining in inert gas at 450-500 DEG C for 2-2.5 hours, and after calcining, cooling to obtain the rod-like porous Co/C nanorod composite electrocatalyst. The rod-like porous Co/C nanorod composite electrocatalyst is prepared from NTA and metal salt Co (NO3) 2.6 H2O through hydrothermal treatment and then tubular furnace sintering, the condition is mild, the purity is good, and the prepared rod-like porous Co/C nanorod composite electrocatalyst has high electrocatalytic activity.

The invention discloses a method for rapidly preparing green MOFs (Metal-organic frameworks) porous microspheres. The method comprises the steps: adding a first polymer to a solvent, and stirring andmixing at room temperature to obtain a mixed solution I; adding MOFs to the mixed solution I, and then stirring and mixing at room temperature to obtain a mixed solution II; ultrasonically oscillatingthe mixed solution II uniformly, and then obtaining the green MOFs porous microspheres by electrospinning treatment. The method disclosed by the invention has the advantages that the preparation process is simple, safe and controllable, less time and energy are consumed, and the cubic crystal type MOFs are converted into the MOFs porous microspheres by electrospinning. Most importantly, in the process of preparing the MOFs porous microspheres, no contaminating heavy metals or toxic substances are used, and no pollution is caused.

The invention discloses a process for preparing a Fenton catalyst by using KOH modified rice husks, and applications of the Fenton catalyst in degradation of printing and dyeing wastewater. The process comprises: S1, preparing KOH modified rice husks: adding rice husks into an 80-100 g/L KOH solution, carrying out water bath stirring treatment at 50-80 DEG C for 40 min, washing, drying, and crushing; S2, preparing hydrochloric acid doped polyaniline; and S3, preparing a KOH modified rice husk loaded Fenton catalyst: sequentially adding the hydrochloric acid doped polyaniline, FeSO4.7H2O, FeCl3.6H2O and the KOH modified rice husks into a DMF solution containing 0.01 mol/L AgNO3, carrying out a stirring reaction for 24 h at 40 DEGC under the action of ultrasonic waves, adding a 0.25 mol/L KOH solution in a dropwise manner for 2 h, continuously stirring for 30 min, ending, filtering, washing, drying, and roasting for 3 h at 150-200 DEG C in an N2 atmosphere. According to the invention, the nanometer Ag-Fe2O3/KOH modified rice husk composite Fenton catalyst is synthesized by firstly using the KOH modified rice husk as the carrier through the in-situ one-step method at a low temperature, so that the operation is simple, the preparation cost is low, the catalytic activity is high, the selectivity is strong, and the catalyst can be recycled.

The invention provides an electrical element for a computer data processing device. The electrical element comprises an element base layer, the element base layer is plated with a tin layer by adopting an electroplating process, the element base layer is electroplated in an electroplate liquid in the electroplating process, and a compact plating layer with the thickness of 5.0-10.0 microns is formed by electroplating. According to the electrical element for the computer data processing device and the manufacturing method of the electrical element, the element base layer is electroplated in theelectroplate liquid, the electroplate liquid adopts nickel sulfate and nickel chloride as base materials, and the dispersion of the electroplate liquid is improved by adding a dispersing aid, so thatthe dispersion effect of the electroplate layer on the element base layer is enhanced, and the bonding strength of the electroplate layer and the element base layer is improved.