58results about How to "Increase the reactive surface area" patented technology

The invention provides a process for producing nonpassivated silicon, which process comprises providing a sample of silicon and, under inert conditions, reducing the mean particle size in the sample by applying a mechanical force to the sample. The invention also provides nonpassivated silicon which is obtainable by such a process, and compositions which comprise the nonpassivated silicon. Further provided is a process for producing hydrogen, which process comprises contacting water with nonpassivated silicon, thereby producing hydrogen by hydrolysis of said silicon. The invention also provides a pellet for generating hydrogen, the pellet comprising nonpassivated silicon encapsulated within an organic coating.

The invention relates to a treatment method of volcanic-ash-paste-reinforced recycled concrete aggregate. The method comprises the following steps: (1) carrying out crushing treatment and screening on recycled concrete, and drying to obtain recycled aggregate; (2) adding water into a volcanic ash material with the particle size of less than 60 micrometers to prepare a volcanic ash paste, and carrying out ultrasonic dispersion to form a homogeneous paste solution; (3) immersing the dried recycled aggregate in the step (1) in the homogeneous paste solution prepared in the step (2), and stirring; (4) screening the mixture treated in the step (3) to remove the recycled aggregate, and filtering to remove the excessive paste solution; (5) drying the screened recycled aggregate, and carrying out kneading dispersion on the agglomerate aggregate; and (6) screening the recycled aggregate treated in the step (5) to obtain the volcanic-ash-paste-reinforced recycled concrete aggregate. Compared with the mortar prepared from the untreated recycled concrete aggregate, the 3-day compression strength and 28-day compression strength of the mortar prepared from the volcanic-ash-paste-reinforced recycled concrete aggregate are enhanced by 17% or above, the chlorine ion permeability coefficient is lowered by 30% or above, and the new/old interface microhardness of the mortar is enhanced by 30% or above.

The present invention relates to a Membrane Electrode Assembly (MEA) which significantly enhances power density as well as structural reliability and method for producing the same. More specifically, it relates to the Membrane Electrode Assembly which has a plurality of protuberances and method for producing the same. The present invention involves making supporting bodies to have a plurality of protuberances on one side of the supporting bodies, forming a catalyst layer on one side of the supporting bodies having the protuberances, interposing a polymer-electrolyte-membrane between the supporting bodies, aligning the supporting bodies for the protuberances to engage each other; and hot-pressing the aligned supporting bodies. The present invention can increase the area of a three-phase boundary in which oxidation-reduction reaction of hydrogen and oxygen occurs and decrease resistance to ion conduction; consequently fuel cells have the characteristic of a large output of power density.

The invention relates to a high-performance super-capacitor electrode material Co-Fe type prussian blue nano cube as well as a preparation method and application thereof, and belongs to the technical field of electrode material preparation. According to the preparation method, inorganic cobalt salt and potassium ferricyanide are adopted as reaction raw materials, trisodium citrate is adopted as a complexing stabilizer, a liquid-phase precipitation reaction method is implemented, reaction conditions such as the use amount and the stand aging time of potassium ferricyanide are controlled, a Co-Fe type prussian blue nano cube material with good dispersibility and large specific area is prepared, and the size of the material is about 300nm. By adopting the Co-Fe type prussian blue nano cube material provided by the invention, the capacity of an electrochemical electric container is increased, properties such as the rapid charge and discharge property and the service life of the electric container are improved, the capacitance of the electric container is as high as 447F/g in constant current charge and discharge of 5A/g in a 1mol/L sodium sulfate solution, and the good rate capability is achieved.

The invention relates to electro-deposition gold nanoparticles, a preparation method and application thereof to the field of electrochemical sensors, which is used for increasing the reaction surface area of an electrode and quickening the rate of electronic transfer, and the method of in-situ electrochemical deposition of the gold nanoparticles can be used for rapidly and simply constructing a nano platform of the electrochemical sensors.

The invention provides a honeysuckle flower cellulose fiber. The honeysuckle flower cellulose fiber is prepared from flax pulp; the honeysuckle flower cellulose fiber contains 5% or more of honeysuckle flower extract, 1-3% of pine bark extract and 2-6% of proteins; the dry fracture strength of the honeysuckle flower cellulose fiber is 3.6-4.2 cN/dtex; the wet fracture strength is 2.3-2.8 cN/dtex; and the dry elongation at break is 21.6-22.5%. The honeysuckle flower cellulose fiber prepared in the invention adopts the flax pulp as a raw material, and the flax contains unsaturated fatty acids, so the honeysuckle flower cellulose fiber has good repairing and protecting effects on skins, has no irritation, has the efficacy of moisturizing dryness, detoxifying, relieving pains and eliminating swelling, and can be used for preventing and treating prurigo and allergy of skins; and a fabric made of the honeysuckle flower cellulose fiber has good compatibility with skins.

The invention provides a lead-acid battery grid, comprising a grid main body, bulges which are arranged in arrays are formed on one side of the grid main body, and side-open type through holes are formed between the bulges and the grid main body. The invention also provides a lead-acid battery polar plate which comprises a grid and lead plaster coated on the surface of the grid. The invention also provides a method for preparing the above polar plate grid, comprising the steps of manufacturing a lead belt, rolling belt on the lead belt, punching and deep drawing. The invention can greatly save the use amount of lead, improve the charging receptivity, discharging platform, specific energy and specific power of the polar plate; the method provided in the invention is simple, and the manufactured polar plate grid has high quality, thus being capable of realizing continuous and high-yield production of the polar plate grid, reducing bit material remelting consumption of lead, and loweringproduction energy consumption and material oxidation.

The present invention provides a microfluidic filter system using three-dimensional carbon nanotube networks. The density of the carbon nanotubes can be adjusted such that particles having a specific size can be filtered. In addition, the network structures can be maintained even in a fluid. The present invention also provides a method for preparing the microfluidic filter system.

The invention discloses a catalytic removal device for NOx and CO in a tail flue of a pi-shaped pulverized coal boiler. The catalytic removal device comprises a shield-type heated surface, a flow guide plate, a flow straightening grid, an active catalytic material, a low-temperature reheater and a low-temperature superheater which are sequentially arranged in the tail flue of the pi-shaped pulverized coal boiler along the flow direction of smoke, wherein the active catalytic material is arranged by virtue of a space in the tail flue of the pi-shaped pulverized coal boiler, NOx is reduced by virtue of CO generated by low-oxygen combustion, and excessive CO is oxidized into CO2, thus the heat efficiency of the boiler is increased while the emission of NOx is effectively reduced. According to the catalytic removal device disclosed by the invention, a heavy-metal oxide catalyst which easily causing secondary pollution is not used, thus normal running of the boiler is not influenced, a running cost is not increased, and a reformation investment is low; the emission of nitrogen oxides at the outlet of the tail flue is effectively reduced in combination with a low-oxygen combustion technology, and meanwhile, the easily-caused problem of efficiency reduction of the boiler due to the low-oxygen combustion is solved; and the catalytic removal device can be used for both environment-friendly reformation for an existing pi-shaped pulverized coal boiler, and design for a newly-constructed pi-shaped pulverized coal boiler.

The invention discloses a method for preparing a sulfur battery positive pole by using protein. The method specifically comprises the following steps: step one, weighing egg white, starch and alkalinealum water respectively, and mixing the weighed materials to form a pasty mixture; step two, drying the pasty mixture obtained through the step one to obtain a cake; step three, putting the cake obtained through the step two into a sintering furnace in which nitrogen is introduced for calcinations treatment to obtain powder; step four, after mixing the powder obtained through the step three withsublimed sulfur, carrying out grinding treatment to obtain mixed powder, and heating the mixed powder to obtain sulfur-carried C-N powder; and step five, mixing the sulfur-carried C-N powder obtainedthrough the step four with a conducting agent and an adhesive to form a mixed material, and carrying out tabletting treatment on the mixed material to obtain the sulfur battery positive pole. A nettedcarbon-nitrogen structure is contained in the positive pole prepared according to the method disclosed by the invention, the capacity of a battery can be increased, the charging and discharging of the battery are easy, and the service life of the battery can be prolonged.

The invention discloses a preparation method of a Sb-based ductile carbon composite negative electrode material. The method comprises the steps of dissolving metal salt and citric acid in deionized water to obtain a uniform transparent solution; adding a graphene oxide solution into the transparent solution, and continuously stirring to obtain a uniform mixed solution; rapidly freezing the mixed solution, removing solid by means of freezing and drying to obtain a spongy sample, grinding the spongy sample into fine powder to obtain mixed powder; and carrying out heat treatment on the composite powder. The material is obtained according to a one-step synthesis method, the preparation method is simple, and the material has the advantages of high capacity, long cycle life, excellent rate performance and good stability. Lithium ion batteries based on the Sb-based ductile carbon composite negative electrode material are enabled to have ultra-long cycle stability and excellent rate performance.

The invention discloses a catalytic-cracking metal passivator which is composed of the following components in parts by weight: 7-9 parts of organic acid, 22-27 parts of triethylamine, 140-160 parts of hydrogen peroxide, 135-160 parts of antimony trioxide, 30-40 parts of ammonium bicarbonate and 160-180 parts of water. According to a formula disclosed by the invention, the ammonium bicarbonate is used and is decomposed along with continuous temperature rise to generate gas, so that a reaction surface area is enlarged to make the antimony trioxide react fully and completely. The catalytic-cracking metal passivator disclosed by the invention is high in antimony content, and the pentavalent antimony passivator is low in viscosity, low in solidifying point, high in thermal decomposition temperature and good in stability, has an obvious effect on pollutant metallic nickel on a passivation catalyst in a catalytic cracking process, and has the antimony hanging rate far more than that of organic antimony and trivalent antimony passivators; and in addition, raw materials used according to the invention are low in toxicity and are free from harm to a human body, secondary pollution to the environment and adverse influences to products and subsequent processing of the products.

The invention relates to an efficient precipitation device and process with ammonia nitrogen removal capacity. The whole set of precipitation device comprises a coagulation tank, a flocculation tank,an inclined plate sedimentation tank and a slime separator sequentially connected in a sewage treatment direction; a feeding hole for a coagulant and an ammonia nitrogen adsorption material is also arranged at a feeding pipe of the coagulation tank; a bottom outlet of the slime separator is further connected with a regeneration tank; the bottom of the regeneration tank is also connected with a grit-water separator; and an upper outlet of the grit-water separator returns to be connected with the regeneration tank, and a lower outlet of the grit-water separator returns to be connected to the feeding pipe of the coagulation tank. Compared with the prior art, the efficient precipitation device is good in treatment effect, easy to regulate, capable of reducing the floor area while realizing theremoval of suspended matters and ammonia nitrogen, wide in applicability and remarkable in economic benefit.

Coal-derived mineral matter is used to capture or remove combustion gas emissions from flue gas or exhaust gas. The coal-derived mineral matter may be obtained by separating it from coal particles, such as by use of a flotation separation process. Coal-derived mineral matter may also be present in fine coal refuse. In the method of removing combustion gas emissions from flue gas, an aqueous suspension of coal-derived mineral matter particles is contacted with the combustion gas emissions for sufficient time to cause the combustion gas emissions to react with the aqueous suspension and form an enhanced aqueous suspension. The combustion gas emissions may comprise NOx, SOx, CO, or mixtures thereof. An aqueous suspension of coal-derived mineral matter particles containing enhanced amounts of soluble and insoluble sulfate, sulfite, nitrate, nitrite, or carbonate reaction compounds formed by reaction of the aqueous suspension of the coal-derived mineral matter particles with combustion gas emissions.

The invention belongs to the technical field of electrochemical anode manufacturing, relates to preparation of a titanium-based insoluble anode, and particularly relates to an IrO2 nano-coating anodewith a TiN nanotube intermediate layer. The anode material takes Ti as a matrix, an IrO2 nano coating is prepared on the surface, and meanwhile, a TiN nanotube intermediate layer is prepared between the IrO2 nano coating and the Ti matrix. The anode product provided by the invention has the characteristics of large specific surface area, excellent electrical conductivity, thermal conductivity, corrosion resistance and the like, and the TiN nanotube intermediate layer is firmly combined with the IrO2 coating and the titanium matrix. The IrO2 coating of the prepared anode has obvious IrO2 grains, the grain size is 10-100nm, the reaction surface area is larger, and more electrochemical reaction places can be provided. The determination result of the electrocatalytic activity and the service life shows that the IrO2 nano-coating anode is superior to a common titanium-based IrO2 coating anode.