1272results about How to "Rich pore structure" patented technology

The invention provides a novel filter stick for cigarettes and a preparation method thereof. Tobacco particles are added in a filter core of the filter stick, tobacco leaves and tobacco smalls are adopted as main raw materials of the tobacco particles and are used as additives after the technical processing such as pulverizing, rotten prevention, granulating, fumigating, perfuming and the like tobe thrown into tows of the filter stick, and then the filter stick containing the tobacco particles or the filter stick with a composite structure can be prepared by adopting a filter stick forming machine. The filter stick can strengthen the adsorption function, can reduce the tar and alleviating the harm, and fragrance of the tobacco particles also can effectively compensate the decreased fragrance of the cigarette caused by the filtering of the filter stick. At the same time, the filter stick is easy to cut and is friendly to the environment.

The invention provides a double metal hydroxide-composited porous bismuth vanadate photo-electrode and a preparation method thereof, wherein a composite of Co-Al double metal hydroxide and bismuth vanadate is grown on the surface of an electric-conductive glass substrate. The pore size of the bismuth vanadate is 50-120 nm and the particle size of the bismuth vanadate is 200-300 nm. The Co-Al double metal hydroxide is grown on the bismuth vanadate particles with the thickness being 10-100 nm. The preparation method includes following steps: 1) preparing a porous bismuth vanadate electrode through an electro-deposition precursor method; and 2) growing the Co-Al double metal hydroxide on the porous bismuth vanadate electrode. The method is simple in operation and is mild in reaction conditions. With zinc ion as an electro-deposition additive for controlling the size and appearance of the bismuth vanadate electrode, the method is more green and environment-friendly compared with a method in the prior art with an organic template agent or organic additives, so that the method is suitable for large-scale production. The photo-electrode can be directly used in photo-electro-chemical water oxidizing catalytic reaction. Because of excellent catalytic performance and visible light absorption capability of the Co-Al double metal hydroxide, the photo-electrode is significantly improved in water oxidizing performance.

The invention relates to a silicon carbide porous ceramic filter and a manufacturing method thereof, in particular to a filter material for high-temperature liquid or gaseous fluid. The ideal silicon carbide porous ceramic filter has the advantages of gradient pore structure, low sintering temperature, high use temperature, high porosity factor, low pressure drop, large geometric surface area, zigzag flow path, high intensity, long service life, low production cost, easy regeneration and repeated use. Moreover, the filter is formed by compounding and sintering a plurality of layers of ceramic materials of different pore structures, and comprises a main body billet layer, a transition compound film layer and a surface compound film layer. Therefore, the filter is suitable for filtration and purification of various high-temperature and low-temperature fluids such as molten metal, high-temperature flue gas, coking gas and automobile exhaust.

The invention relates to the field of secondary batteries, in particular to phenolic resin-based hard carbon microspheres, a preparation method thereof, and a negative electrode material containing the microspheres. The phenolic resin-based hard carbon microspheres provided by the invention are spherical; d002 is 0.375 to 0.380 nm; the specific surface area is 70 to 350 m<2> / g; the pore volume is 0.08 to 0.18 cm<3> / g. The phenolic resin-based hard carbon microspheres provided by the invention have a small specific surface area, structural stability, large interlayer spacing and rich pore structures, and can be applied to the negative electrode material of a lithium-ion battery or a sodium-ion battery, so that the battery has high capacity and stable cycle performance.

The invention discloses a solid electrolyte material for a lithium battery and a preparation method and application of the solid electrolyte material, and belongs to the field of energy material preparation. The solid electrolyte material comprises a metal organic framework compound, a lithium salt, a film-forming additive and a filling. The solid electrolyte material for the lithium battery does not need polyoxyethylene or a derivative thereof; and compared with other inorganic solid electrolytes, the solid electrolyte material has the advantages of higher lithium ion containing capability, higher ionic conductivity and better heat stability, and the security of the battery can be greatly improved. The lithium-ion all-solid-state battery prepared by the method has the electrochemical properties equivalent to a liquid electrolyte. The solid electrolyte material for the lithium battery can be used for a lithium-ion battery, can be suitable for the systems of a lithium-sulfur battery, a lithium-air battery and the like, and is wide in application.

The invention discloses a method for preparing biomass activated carbon through vacuum freeze drying. The method comprises the following steps: performing steps of raw material crushing, acid treatment, activation soaking, freeze drying, high-temperature activation, acid pickling and the like, performing hydrothermal reaction on biomass raw materials with an acid solution, and further performing freeze drying treatment, thereby obtaining the biomass activated carbon. Compared with the prior art, the method has the advantages that the raw materials are rich and cheap, and rural wastes can be reused; by using a hydrothermal treatment technique in an acid environment, a part of substances in the biomass raw materials can be reduced, and porous loosened structures of the biomass raw materials are maintained; by using a vacuum freeze drying technique, original porous flurry structures of the biomass raw materials can be maintained to the maximum extent, the specific surface area of a product can be increased, and pore structures can be enriched; the biomass activated carbon prepared by using the scheme of the invention is high in specific surface area, rich in pore structure and excellent in synergic adsorption property of water body dye molecules and heavy metal ions, and has significant industrial application values.

The invention discloses nitrogen-doped grading porous carbon microspheres. The nitrogen-doped grading porous carbon microspheres are prepared by performing hydrothermal reaction on glucose and a nitrogen-containing compound and then performing activation, wherein the specific surface area is high and is 1160 to 1791 m<2> / 1, the pore diameter is distributed uniformly and the micropore content is high. The preparation method comprises the following steps: 1) preparing a nitrogen-containing precursor, adding the glucose and the nitrogen-containing compound into water, stirring uniformly, reacting, filtering, washing and drying to obtain the nitrogen-containing precursor; 2) carbonizing and activating the nitrogen-containing precursor, mixing the nitrogen-containing precursor and an alkaline inorganic matter, soaking into water, stirring and drying, and calcining and activating to obtain the nitrogen-doped modified grading porous carbon microspheres; and 3) performing aftertreatment on thenitrogen-doped modified grading porous carbon microspheres, soaking the nitrogen-doped modified grading porous carbon microspheres in a hydrochloric acid solution, washing, filtering, drying and grinding. When the nitrogen-doped grading porous carbon microspheres serve as supercapacitor electrode materials, the specific electric capacity is 248 to 407 F / g. The nitrogen-doped grading porous carbonmicrospheres have an application prospect in the fields of supercapacitors, lithium ion batteries and electric catalysis.

The invention discloses a method for preparing composite photocatalyst containing activated carbon coating. In the method, activated carbon as coating is attached on foam material matrix, so that activated carbon coating material is formed, the activated carbon coating material is used as carrier to carry titanium dioxide, wherein the titanium dioxide as an active component is 1 percent to 10 percent by weight, the activated carbon coating is 4 percent to 15 percent by weight, and the balance is the foam material matrix. Since the method uses the activated carbon coating as photocatalyst carrier, the dispersibility of the titanium dioxide as an active component can be effectively enhanced, the defects of the traditional activated carbon material, including loose structure and low strength, are overcome, the transmission of light in a system is improved, the process of transferring pollutant to the catalyst surface is improved, and moreover, the service life of activated carbon can be greatly prolonged.

The invention discloses a modified magnetic sludge biological carbon and a preparation method and applications thereof. The modified magnetic sludge biological carbon is prepared by carbonizing residual sludge, modifying sludge by alkali, and modifying sludge by acid. The provided modified magnetic sludge biological carbon has the advantages of good magnetic property, large specific surface and pore volume, abundant pore structure, many surface adsorption functional groups and adsorption sites, and strong performance on removing target pollutants; and the preparation method has the advantages of simple preparation, easy operation, low cost, high production efficiency, and convenience for large scale production. The provided modified magnetic sludge biological carbon is used to remove tetracycline hydrochloride in water for the first time, has the advantages of large adsorption amount, strong adsorption performance, high adsorption efficiency, simple and convenient operation, short processing period, low processing cost, and easy separation and recovery, and has a strong performance on removing tetracycline hydrochloride. The maximal balance adsorption amount can reach 253.8 mg / g. The performance of the biological carbon is obviously stronger than that of unmodified magnetic sludge biological carbon.

The invention relates to an adsorbent for removing organic chlorides in a hydrocarbon-containing substance flow and a preparation method thereof. The adsorbent comprises a modified zeolite molecular sieve, an inorganic macroporous material and a clay component. The zinc ion-modified zeolite molecular sieve contained in the adsorbent shows remarkably high reaction activity on organic chlorides; compared with the prior art, the adsorbent has relatively high selective adsorption capacity on organic chlorides; moreover, with wide temperature range and low reaction activity, the adsorbent is suitable for removing at least one organic chloride from a hydrocarbon-containing substance flow containing hydrogen, hydrocarbons and chlorides, and particularly suitable for deeply removing organic chlorides in the oil generated by a catalytic reforming reaction as well as the byproduct hydrogen.

The invention discloses graphene-melamine foam aerogel and a preparation method thereof. The aerogel is black and blocky, density is 8-15mg / cm<3>, and specific surface area is 100-500m<2> / g. The preparation method comprises the following steps: (1) mixing graphene oxide with deionized water to obtain graphene oxide aqueous solution; (2) mixing the graphene oxide aqueous solution with a reducing agent to obtain mixed solution, then putting melamine foams into the mixed solution, and carrying out constant temperature hydrothermal reaction to obtain graphene-melamine foam hydrogel; and (3) putting the hydrogel into a solvent to be cleaned, and then carrying out freeze drying, so that the graphene-melamine foam aerogel is obtained. The graphene-melamine foam aerogel disclosed by the invention has the advantages that superhydrophilic melamine foams are utilized as a skeleton structure to form graphene aerogel, so that the aerogel can be easily immersed in water and can rapidly adsorb organic pollutants in the water; meanwhile, due to addition of the melamine foams, compression performance of the aerogel is improved, and the aerogel can be recycled.

The invention relates to a porous composite material for purifying formaldehyde and TVOCs and a preparation method of the porous composite material, and belongs to the field of air purification materials. The porous composite material for purifying formaldehyde and TVOCs is characterized by comprising a core-shell structure, wherein the core-shell structure consists of a core material with a porous carbon material, and a shell material containing a catalytic component; pore channels for air circulation are formed in both the core material and the shell material. By adopting the porous composite material provided by the invention, a material formation process can be simple and easy to operate, the purification capacity for formaldehyde can be up to 6.05mg / g, and the purification capacity for methylbenzene can be as high as 299.41mg / g.

The invention discloses a composite biological carbon-based carrier with pesticide slow release performance and preparation method and application. The composite biological carbon-based carrier is prepared from modified biological carbon, a pesticide solution, sodium carboxymethylcellulose and bentonite. The preparation method comprises the following steps: A, washing rape stalks with water, drying, treating, smashing, and screening for later use; C, performing pyrolysis on the rape stalks at a certain temperature under the condition of limited oxygen to obtain biological carbon, treating the biological carbon with sodium hydroxide, washing with treated biological carbon with deionized water till the pH is constant, drying in a drying oven, and smashing to obtain the modified biological carbon; D, mixing the modified biological carbon with the pesticide solution to obtain a suspension-loaded pesticide, stirring at room temperature, uniformly mixing the sodium carboxymethylcellulose with the bentonite according to weight parts, aging for a certain time, and drying a solid substance in an air blast drying oven at a low temperature to obtain the composite carrier. The invention further relates to application of the composite carrier to rape cultivation. A composite controlled-release substrate does not generate any side effect on soil, has high environment compatibility, and can prolong the release time of the pesticide in soil.