490results about How to "High porosity" patented technology

This invention provides a metal encapsulated dendritic carbon nanostructure comprising a dendritic carbon nanostructure comprising a branched carbon-containing rod-shaped or annular material and a metallic body capsulated in the carbon nanostructure. There is also provided a dendritic carbon nanostructure comprising a branched carbon-containing rod-shaped or annular material.

A container (1) for the cultivation of plants is described, the container (1) comprising an inner container (2) for housing a plant cultivation medium (C), an outer container (3) fixed around the inner container (2) and provided with a bottom wall (5) arranged at a predetermined distance (d_f) from the bottom wall (5) of the inner container (2), the outer container (3) defining with the inner container (2) an airspace (7) substantially sealed in a fluid-tight manner, wherein a storage zone (A) of an irrigation liquid (L) is defined, and an elongated element (10) for the capillary upwelling of the irrigation liquid (L) towards said cultivation medium (C). The container (1) of the invention enables to provide the plant housed in the cultivation medium (C) with the proper quantity of irrigation liquid (L) as a function of the plant needs.

The invention relates to an oil-absorbing polyurethane foam material, which is a semi-hard polyurethane foam material with low density and high aperture ratio. The density range is 8-30kg/m3, the aperture ratio is above 90 percent, and the contact angle of the material surface and water is more than 75 degrees. The material has high oil-absorbing capability, and taking the No. 0 diesel as an example, the oil-absorbing rate of the material is higher than 35g/g. Moreover, the material not only can directly absorb oil, but also can absorb oil floating on the water surface or oil in oil-water mixture. The invention also relates to a method for emergency disposal of oil spillage and other contingencies. When the oil spillage and unexpected incident occurs, the oil-absorbing polyurethane foam material can be rapidly prepared on the accident scene to block and absorb the spilling oil at the accident source.

The invention discloses a biological decomposable polymer nanometer fiber film material and preparing method and usage, which is characterized by the following: the material is made of several nanometer to several hundred nanometer fiber diameter nonwoven material, wherein the hyaluronic acid is more than 0 less than or equal to 100; other macromolecular material quantiy is more than 0 less than 100; the quantity of remedy medicine is 0-10 part. The invention possesses well biological compatity, biological decomposition and absorption property, which is applied in the medical tissue engineering rack material.

Provided are separators for use in an electrochemical cell comprising (a) an inorganic oxide and (b) an organic polymer, wherein the inorganic oxide comprises organic substituents. Preferably, the inorganic oxide comprises an hydrated aluminum oxide of the formula Al₂O₃.xH₂O, wherein x is less than 1.0, and wherein the hydrated aluminum oxide comprises organic substituents, preferably comprising a reaction product of a multifunctional monomer and/or organic carbonate with an aluminum oxide, such as pseudo-boehmite and an aluminum oxide. Also provided are electrochemical cells comprising such separators.

The invention discloses a cellulose composite microsphere, a preparation method thereof and application. The particle size of the cellulose composite microsphere is 1mum-1200mum, the specific surface area of the cellulose composite microsphere is 100m<2>/g-500m<2>/g, and the aperture of the cellulose composite microsphere is 200nm-900nm. The preparation method comprises the following steps of: preparing a mixture solution of cellulose and a composite material by using the cellulose as a matrix, a polymer material as composite material and a water solution of alkali/urea or alkali/thiourea as a solvent, and obtaining the cellulose composite microsphere through sol-gel phase transition and cross-linking agent cross linkage. The advantages of cellulose microsphere are reserved by the cellulose composite microsphere, and due to the adding of the composite material, new functional groups are simultaneously added for the surface of the microsphere and further decoration and modification are facilitated. An organic solvent used in the preparation method disclosed by the invention can be reused, the whole preparation technology is simple, low in time consuming, undemanding for equipment and convenient for industrial production, and the prepared cellulose composite microsphere has a good flow property and mechanical property and a wide application.

The invention relates to a nano iron nitride-carbon composite catalyst for a lithium-air battery and a preparation method of the composite catalyst. The method comprises the steps of feeding iron salt, organic ligand and a surface active agent into a solvent, and carrying out heating reflux; mixing the obtained nano-sized mesoporous metal organic framework complex and a nitrogenous organic compound, and carrying out heat treatment on the mixture in the presence of ammonia gas to realize carbonization and nitridation by one step. The catalyst is formed by compounding nanoscale primary iron nitride particles and carbon material; carbon covers and partly covers the surfaces of the nanoscale primary iron nitride particles; rich mesoporous gaps exist among the stacked nanoscale primary iron nitride particles. The rich mesoporous structure of a precursor is maintained by the catalyst, the catalyst has large specific surface area and high porosity, and is beneficial to diffusing oxygen molecules into the catalyst material particles, so that the contact between oxygen and the catalyst is promoted, and the utilization rate of the catalyst is increased; the electrical conductivity is effectively improved by the carbon material on the surfaces of the particles; the nano iron nitride-carbon composite catalyst is good in stability, so that the catalytic performance is well exerted. The charge and discharge polarization of the lithium-air battery is effectively reduced; furthermore, the method is simple and convenient, the operation is easy, the cost is low, and large-scale production can be easily implemented.

The invention belongs to the technical field of fiber membranes, and discloses a Kevlar nano fiber porous membrane which has high strength, high temperature resistance and solvent resistance, and a preparation method and application thereof. The preparation method comprises the following specific steps: dissolving Kevlar fibers in organic solvent, adding assistants and strong alkali, heating, and stirring to disperse, thus obtaining a Kevlar nano fiber dispersion; adding a pore forming agent into the dispersion, uniformly stirring to from a membrane casting solution, and performing vacuum degassing for later use; forming the membrane casting solution into a membrane on a glass plate through blade coating, evaporating the solvent, putting into a gel bath to obtain a gel membrane, and soaking in water; and performing heat treatment on the soaked gel membrane to obtain the Kevlar nano fiber porous membrane having high strength, high temperature resistance and solvent resistance. According to the invention, the Kevlar fibers are dispersed into nano fibers and then formed into the membrane through a mild method, so that the excellent properties of high strength, high modulus and solvent resistance are reserved; and a three-dimensional porous structure is endued. Thus, the Kevlar nano fiber porous membrane is applicable to water treatment in a harsh environment.

The invention belongs to the technical field of separation of CO2 in flue gas discharged during s combustion process, and in particular relates to a process and equipment for removing CO2 in flue gas by utilizing an amine solid adsorbent. In the process, the CO2 gas in the flue gas is fully contacted with the amine solid adsorbent so that CO2 gas molecules are rapidly diffused into pores of the solid adsorbent to react with amine liquids in the pores and then the CO2 is rapidly adsorbed by the adsorbent, and meanwhile the amine solid adsorbent adsorbed with the CO2 is regenerated by utilizing one or more regeneration methods such as thermal regeneration, vacuum regeneration, steam regeneration, amine steam regeneration and gas introduction regeneration. The adopted main equipment consists of a CO2 absorption reactor using the amine solid adsorbent, a regeneration reactor, a gas-solid separator, a gas-liquid separator and the like. The process and equipment provided by the invention have the advantages of simple and compact overall design, low investment and operating cost, stable and reliable operating performance and capability of efficiently separating the CO2 in the flue gas with low cost.

The invention discloses a preparation method for a foam aluminum alloy-based wave absorbing material and includes the steps of a surface pretreatment of the foam aluminum alloy material, a preparation of wave absorbing agent material and a spraying of the foam aluminum alloy material; the preparation method of the invention is characterized in that the foam aluminum alloy material through degreasing and sand spraying treatments is took as a basic body, and a single wave absorbing material or compound wave absorbing materials are coated on the surface of the basic body to prepare a foam aluminum alloy-based absorbing material of single wave absorbing agent or foam aluminum alloy-based absorbing material of compound wave absorbing agent. The product of the invention provides a new thought for a development of wave absorbing material, and a new field for the popularization and application of foam metal materials and establishes theory and technique foundations for the developing of porous material-based wave absorbing materials.

Disclosed is a honeycomb ceramic article that exhibits a primary crystalline phase of cordierite having a coefficient of thermal expansion (CTE), wherein CTE<1.5×10⁻⁷/° C. over the temperature range of about 25° C. to about 800° C.; a total porosity, P, of at least 28%, a transverse I-ratio, I_T, of less than 0.92; and a pore size distribution wherein at least 60% of the total pore volume is comprised of pores having diameters between 0.5 μm and 5.0 μm. Also provided is a ceramic honeycomb article comprising a phase of cordierite and exhibiting a mean CTE<1.0×10⁻⁷/° C. (from 25 to 800° C.) in at least one direction, and 28%≦P≦33%. Methods of manufacturing ceramic articles comprising the aforementioned cordierite compositions are also disclosed.

The invention relates to an asymmetrically-structural ceramic ultrafiltration membrane and a preparation method thereof, wherein the preparation method thereof comprises the steps: dispersing one-dimensional fibrous material in sol and sufficiently mixing the material with the gel; by adding deionized water, controlling the weight ratio of gel particle to fiber in membrane preparing solution in a range from 0.01 to 0.4, adjusting pH value of the solution, adding dispersing agent, thickening agent and defoaming agent to formulate the membrane preparing solution, coating membrane on a porous support body and drying the porous support body to form a transition layer; coating the gel-containing membrane preparing solution on the surface of the transition layer, air-drying, oven-drying and roasting the wet membrane, and naturally cooling the membrane to result in the asymmetrically-structural ceramic ultrafiltration membrane. Since the transition layer is composed of fiber and sintering is promoted through the gel, resistance of the transition layer is advantageously lessened and interior combination strength of the transition layer is enhanced; the fiber-constructed transition layer divides large pores into small pores to provide larger total porosity and flowing pore channel, thus high permeation flux is maintained while high selectivity is obtained.

The invention provides a preparation method of a waterproof and moisture permeable membrane. The preparation method comprises the following steps: dissolving a hydrophobic polymer in a first spinning solvent to obtain a hydrophobic spinning liquid; carrying out first electrostatic spinning on the hydrophobic spinning liquid to obtain a monolayer waterproof and moisture permeable membrane; or dissolving a hydrophilic polymer in a second spinning solvent to obtain a hydrophilic spinning liquid; carrying out second electrostatic spinning on the hydrophilic spinning liquid to obtain a hydrophilic nanofiber membrane; and compositing the monolayer waterproof and moisture permeable membrane and the hydrophilic nanofiber membrane to obtain the double-layered waterproof and moisture permeable membrane. The method provided by the invention is simple in process flow, low in energy consumption and high in production efficiency, and is suitable for industrial production. The waterproof and moisture permeable membrane obtained by the method provided by the invention has extremely high porosity and a small gap size, and gaps are zigzag holes rather than through holes, thus facilitating pass of water vapor molecules but blocking pass of water drops. Therefore, the waterproof and moisture permeable fabric has high hydrostatic pressure resistance, ventilation, moisture permeability and mechanical strength.

The invention discloses lithium-sulfur battery anode material comprising porous metal. The porous metal is compounded with lithium sulfide so as to be used as the anode material of the lithium-sulfur battery. The invention also discloses a preparation method of the lithium-sulfur battery anode material comprising the porous metal. According to the invention, by utilizing the characteristics of high electric conductivity, high porosity, high specific surface area and the like of the porous metal, elemental sulfur or the lithium sulfide is filled into pores of the porous metal, metal/sulfur composite material can be manufactured, and the utilization rate of the elemental sulfur and the lithium sulfide and the multiplying performance of the composite electrode can be increased; and simultaneously, by utilizing the strong interaction between the porous metal and the elemental sulfur or the lithium sulfide, the elemental sulfur, the lithium sulfide or polysulfide generated in a charge-discharge process can be more firmly attached on the surface of the porous metal, the dissolution of the polysulfide in an electrolyte, the shuttle effect caused by the dissolution of the polysulfide in the electrolyte and the deactivation on an anode and a cathode by redox product of the polysulfide can be restrained, and the circulation stability of a metal/sulfur composite electrode and the lithium-sulfur battery can be increased.

Methods of fracturing a subterranean formation penetrated by a well bore, that include the steps of placing a fracturing fluid comprising a first stabilizing substance into the subterranean formation at or above a pressure sufficient to create or enhance at least one fracture in the subterranean formation; placing a treatment fluid comprising a gel carrier fluid, degradable solid-free gel bodies, and solids-laden gel bodies into the fracture such that the solids-free gel bodies and the solids-laden gel bodies form multiple packs within the fracture; and, breaking the gel carrier fluid and allowing the solid-free gel bodies to degrade to create a high porosity propped fracture formed of the solids-laden gel bodies wherein the propped fracture has a porosity of at least about 40%.

A plasma cleaning method particularly useful for removing photoresist and oxide residue from a porous low-k dielectric with a high carbon content prior to sputter deposition. A remote plasma source produces a plasma primarily of hydrogen radicals. The hydrogen pressure may be kept relatively low, for example, at 30 milliTorr. Optionally, helium may be added to the processing gas with the hydrogen partial pressure held below 150 milliTorr. Superior results are obtained with 70% helium in 400 milliTorr of hydrogen and helium. Preferably, an ion filter, such as a magnetic filter, removes hydrogen and other ions from the output of the remote plasma source and a supply tube from the remote plasma source includes a removable dielectric liner in combination with dielectric showerhead and manifold liner.

The invention discloses a biomass-based grading porous carbon and a preparation method thereof. The method comprises the following steps of shearing and sieving the biomass raw materials to 20 to 80 meshes; adding the materials into a double-salt system water solution; performing stirring; performing low-temperature hydro-thermal method pre-carbonization treatment for 5 to 20h at 180 to 300 DEG C;performing washing and filtering to obtain a pre-carbonization product; then raising the temperature to 600 to 1000 DEG C in inert atmosphere; performing carbonization activation treatment for 0.5 to8h; performing acid washing, alkali washing or ultrasonic treatment on the obtained product; then washing the materials by water to the neutral state; performing drying to obtain the biomass-based grading porous carbon. The hydrothermal carbonization is performed during the pre-carbonization; the double-salt system is used as a salt template and a pre-hole-forming agent; the adverse conditions are provided for the subsequent carbonization activation for preparing the porous carbon; the obtained porous carbon has high specific surface area and the loose three-dimensional connection pore passage structures; high electrical conductivity and good capacitive characters are realized; the biomass-based grading porous carbon can be applied to supercapacitors as carbon electrodes.

The invention relates to a recoverable TiO2-SiO2 composite aero-gel photo-catalyst as well as the preparation method thereof. The invention is characterized in that the sol-gel method is firstly utilized for respectively preparing TiO2 sol and SiO2 sol, then the two are mixed according to a certain proportion to obtain a mixed sol, and then TiO2-SiO2 composite alcogel is obtained through polycondensation reaction; the TiO2-SiO2 composite alcogel is used for preparing TiO2-SiO2 composite aero-gel after drying, and the composite aerogel is used for obtaining composite aero-gel aggregates after baking for 6 to 8 hours. The pore size of the obtained composite aero-gel aggregates is distributed between 2.5 nm to 10 nm, and the particle diameter is distributed between 10 nm to 15 nm, while the particle diameter of the aggregates is distributed between 0.1 mm and 0.3 mm. Compared with the prior art, the TiO2-SiO2 composite aero-gel photo-catalyst has the advantages that the prepared TiO2-SiO2 composite aero-gel has large specific surface area, high porosity, uniform pore distribution, etc., wherein, TiO2 is in the anatase crystal form. Compared with the TiO2 nanometer powder absorbent, the photo catalytic activity of the TiO2-SiO2 composite aero-gel is higher, the photo catalytic efficiency is better, and the regeneration and the reuse of the composite aero-gel are convenient as the particles of the aero-gel aggregates are larger, thereby the recoverable TiO2-SiO2 composite aero-gel photo-catalyst is widely applicable to the treatment of a great amount of wastewater.

The invention provides compound copper powder for manufacturing a capillary structure inside a heat pipe, which is a mixture consisting of copper powder and pore-forming agent powder. The compound copper powder ensures that a more favorable capillary structure layer can be produced under the condition of not changing the conventional heat pipe manufacturing process. The compound copper powder obtained by the invention is ram-jolted and sintered and then is prepared into the capillary structure layer with high porosity; and the effective porosity and the through hole ratio thereof are greatly improved compared with that of ordinary copper powder, and the permeability is also greatly improved compared with that of materials fired by the ordinary copper powder, which greatly improves the heat transfer efficiency of the heat pipe.

The invention discloses a preparing method of porous alumina ceramic through sol-gel freezing drying technique, which comprises the following steps: adopting aluminium isopropoxide as former; hydrolyzing under high temperature to obtain alumina sol; controlling the solid content of sol; adding moulding agent; blending evenly; casting; moulding; removing air to form vacuum; freezing at low temperature; drying and moulding the frozen sample; detackifying moulded sample under low temperature; placing in the high-temperature furnace; sintering; obtaining the porous alumina ceramic with bending-proof strength reaching 65Mpa and bulk density at 0.14-2.4g/cm3. The adjustable aperture is 1-100um, which can be filter, catalyst carrier and heat insulating material.

The invention is suitable for the field of lithium ion batteries, and provides a preparation method of a porous pole piece. The preparation method comprises the following steps: mixing a pore forming material and slurry to obtain a mixture, and coating a pole piece with the mixture; and baking the pole piece at 100 to 150 DEG C to obtain a porous pole piece, wherein the porosity of the pole piece is 35 to 45 percent. The invention also provides a lithium ion battery containing the porous pole piece. The porous pole piece has higher porosity and further has higher liquid preserving capacity. The lithium ion battery containing the pole piece has higher multiplying power performance and higher cycling performance. Meanwhile, the formed pores are convenient for discharging gases, so that the service life of the battery is prolonged. According to the porous pole piece and the preparation method thereof and the lithium ion battery containing the porous pole piece, the preparation method is simple, the operation is simple and convenient, and the industrialized production can be realized.

A method for preparing a nanostructured composite electrode through electrophoretic deposition and a product prepared thereby are presented. A conductive material and an active material are suspended into a stable suspension in solution by ultrasonication. The conductive material includes functionalized carbon multi-walled nanotubes. The active material includes synthesized nanoparticles. A surface charge is applied to the active material by adding an electrolyte into the stable suspension. At least two electrodes are introduced into the stable suspension in opposing parallel orientation. A direct current electrical field is formed between the electrodes sufficient to cause conductive material and the active material formation thereupon.

The present invention relates to medical biological ceramic material technology, and is a kind of artificial bone rack of nano toughened calcium phosphate of high porosity. The present invention has nano zirconia grains added into calcium phosphate to raise the compression strength and toughness of artificial bone rack, so as to provide artificial bone rack of biological ceramic material with high porosity, high compression strength and high toughness. The present invention is prepared through mixing nano zirconia grain with hydroxyapatite in certain ratio to prepare slurry, painting the slurry to polyurethane sponge with proper pore size and porosity and sintering. The present invention has high porosity, proper pore size, easy absorption, fast bone tissue fusion speed and other advantages and is used in repairing damaged bone tissue and extracorporeal cell culture.

The invention discloses a battery diaphragm and application thereof. The battery diaphragm provided by the invention is composed of a base membrane and a nanoparticle coating coated on at least one surface of the base membrane. The nanoparticle coating contains at least two nanoparticles, which include ceramic particles and organic polymer particles. According to the battery diaphragm provided by the invention, the organic polymer particles are firstly added into the nanoparticle coating, thus not only enhancing the porosity of the nanoparticle coating, reducing the ionic conductivity of the battery diaphragm, but also enhancing the heat resistance of the battery diaphragm, decreasing the dosage of ceramic particles, and reducing the thickness of the nanoparticle coating. In addition, by adding the organic polymer particles, certain caking property exists between the battery diaphragm and the battery anode and cathode, so that the prepared battery has better oneness, and the diaphragm electrolyte solution wettability and absorption performance can also be improved, thus laying the foundation for providing lithium ion batteries with high security performance.

The invention provides a soil passivating agent suitable for northern sewage irrigation area farmland and further provides an application method of the soil passivating agent, wherein the application method mainly aims at northern sewage irrigation area heavy metal contaminated soil. The soil passivating agent comprises, by mass, 1-6 parts of clay minerals, 1-5 parts of biological carbon and 1-3 parts of humic acid. The clay minerals comprise one or more of sepiolite, zeolite, serpentine, talcum, attapulgite, olivine and bentonite. According to the soil passivating agent containing the sepiolite, the biological carbon and the humic acid, the ecological hazard of heavy metal ions can be reduced through effects such as complexation and electrostatic adsorption of the biological carbon and the heavy metal ions, and the sepiolite can generate ion-exchange action with heavy metal in soil to fix the heavy metal in the soil, so that the purpose of heavy metal pollution removing is achieved. The passivating agent is especially suitable for being applied to the sewage irrigation area farmland soil, soil fertility can be increased, and the hazard of the heavy metal can also be effectively reduced.

The invention relates to a labyrinth cross flow bubbling light-catalyzed reaction device and the method for treating organic wastewater. It is characterized in that the reactor is equipped with a labyrinth liquid passage formed by parallel baffle plate, gas containing oxygen entering from bottom of reactor into distributing plate and bubble into reacting area, organic wastewater flows from liquid inlet pipe on upper of distributing plate and reactor side face, flows in labyrinth reacting area along baffle plate and contacts with rising bubble, and the particular light catalyst floats in gas and liquid mixing phase. The light catalystic reaction proceeds among gas, liquid and solid reacts phase under irradiation of ultraviolet light from upper side of reactor, the organic matter is degraded, the yielding water is separated through outer solid-liquid separator and the light catalytic reaction is continous proceeded under pump action. The invention is characterized by simple construction, convenient operation, long liquid retention time for thorough contact time of liquid and solid, high mass transfer efficiency and light catalytic reaction efficiency, no limit from light source for reactor design enlargement and easy for industrial application.

The present invention relates to a ceramic porous substrate, a reinforced composite electrolyte membrane using the same, and a membrane-electrode assembly having the same. The ceramic porous substrate comprises: a porous polymer base; and void structures formed on the surface of the porous polymer base by linking the space of the inorganic nanoparticles using a polymer binder or a silane-based inorganic binder. The ceramic porous substrate has improved mechanical properties compared to the porous polymer substrate alone, and the void structures thereof can be controlled in various ways.

The invention provides a wet copper basic powder metallurgy friction disc and a manufacture method. The friction disc mainly consists of a middle steel core plate and at least a side upper friction layer; at least one surface of the steel core plate is combined with a rubber film layer which is composite with a friction layer; the manufacture method at least comprises friction layer material distributing, mixed material, pressing-typed, burning, assembly with the steel core plate, and oil trough processing. The invention is characterized in that no pressure burning in a continuous burning furnace is adopted for burning; the friction layer after burning is dipped in rubber in a vacuum rubber dipping trough in normal temperature and is dried and assembled with the steel core plate; before the assembly, the surface of the steel core plate is coated; after assembly, the pressurization and solidification are carried out on a slab vulcanizing machine; the invention has the advantages of high efficiency of processing technique, low cost, increasing the hardness and strength, high size precision, etc.

The invention provides a preparation method of a graphene/chitosan porous sponge oil absorption material. The preparation method is characterized by comprising the following steps: (1), preparing a chitosan solution under a room temperature condition, carrying out ultrasonic dispersion on an oxidized graphene solution, slowly adding the graphene solution into the prepared chitosan solution while stirring, and fully blending so as to obtain an uniformly mixed graphene/chitosan solution, wherein the content of the oxidized graphene is 6%-30%; (2) preparing a glutaric dialdehyde solution, slowly adding the glutaric dialdehyde solution into the prepared graphene/chitosan mixed solution, stirring and uniformly mixing, and then carrying out crosslinking for 1-4 hours at 60-100 DEG C; and placing the solution with different graphene and chitosan mixture ratios into a mould and refrigerating, placing a refrigerated sample into a vacuum freezing drier, and freezing and drying for at least 24 hours, thus obtaining the graphene/chitosan porous sponge material with a three-dimensional structure. The graphene/chitosan porous sponge material has the advantages that the porosity is large, the adsorption rate is high, the adsorption stability is good and the repeating utilization ratio is high.

The invention relates to a preparation method and an application of nanometer zero-valence bimetal-supported functional charcoal, and belongs to a preparation method and an application of charcoal for water pollution treatment. The preparation method comprises the following steps: immersing charcoal in a sodium hydroxide solution to modify the charcoal, immersing the modified charcoal in a ferrous sulfate and polyethylene glycol mixed solution, carrying out ultrasonic treatment to make an active component Fe be supported on the modified charcoal carrier, and titrating with sodium borohydride to prepare a zero-valence nanometer iron charcoal-based material; and filtering the nanometer zero-valence iron charcoal-based material, washing the filtered nanometer zero-valence iron charcoal-based material, gradually adding a silver nitrate solution to the above obtained zero-valence iron-supported charcoal solution, and strong stirring to obtain a nanometer zero-valence Ag/Fe bimetal charcoal-based adsorbent. The functional charcoal is prepared from abundant agricultural wastes, the specific surface area and the porosity of the charcoal are greatly improved through regulating the structure of the charcoal by using an in situ supporting and liquid phase reduction technologies, and the charcoal can be widely applied to the sewage treatment field.