75results about How to "Well-developed pore structure" patented technology

The invention discloses a preparation method of a wool-based nitrogen-doped magnetic biochar material, which comprises the following steps: firstly, impregnating impurity-removed and scale-removed wool in a ferric chloride solution for coordination reaction to obtain a wool / iron complex; adding melamine, metal salt and the wool / iron complex into deionized water, sealing to form a closed environment, and then vibrating to uniformly disperse the metal salt and melamine on the surface of the wool; taking out and drying until no water exists to obtain a metal salt / melamine / wool mixture; carbonizing the mixture in an oxygen-free environment, and removing metal salt and impurities in the product; and drying to obtain the wool-based nitrogen-doped magnetic biochar material. The magnetic biochar material loaded with magnetic nanoparticles is prepared from wool, has excellent adsorption effect and adsorption catalysis effect on complex mixed dye liquor, achieves catalysis and adsorption synergistic integration, has superparamagnetism, and can realize solid-liquid separation and recovery by setting an external magnetic field.

The invention discloses a medium and low temperature organic sulfur hydrolytic agent applied to coal gas dry purification and a preparation method thereof, and relates to the technical field of coal gas purification and industrial catalysis, the hydrolytic agent comprises the following components: gamma-Al203, pseudo-boehmite, a pore forming agent, an active agent, an auxiliary agent, an adhesive and water. According to the medium-low temperature organic sulfur hydrolytic agent applied to dry purification of coal gas and the preparation method thereof, an alkali metal element is adopted as an active agent, and the characteristic that the alkali metal element can provide a large number of alkaline reaction sites is utilized, so that organic sulfur molecules are promoted to be preferentially adsorbed with the hydrolytic agent to generate hydrolysis reaction; meanwhile, sodium metavanadate is added as an active auxiliary agent, so that the low-temperature activity of the hydrolysis catalyst is further optimized.

The invention belongs to the technical field of water treatment, and particularly relates to activated carbon with high adsorption capacity. The chlorella protein nucleus is selected as a carbon source, and through secondary activation, the pore structure of the activated carbon is more developed, and the pore size distribution is more concentrated, so that the activated carbon is endowed with better performance.

The invention relates to the technical field of environment-friendly material preparation and water treatment, and particularly discloses a recycling method for producing a porous water treatment filler by using sludge and red mud. The raw material formula is optimized, and the red mud, the sludge, the tourmaline powder, the medical stone powder and other components are selected to jointly form the base material. The filler prepared according to the method provided by the invention not only realizes recycling of solid wastes such as sludge and red mud, but also has an ideal pore structure, can be in full contact with sewage, and is beneficial to improving the sewage treatment efficiency. Meanwhile, mullite, aluminum borate, tridymite and part of minerals in the red mud and clay materials are utilized to jointly form a framework structure of the filler, the mechanical performance of the filler is improved, the filler is not prone to damage in the using process, and the defects in related technologies are overcome.

The invention discloses a three-dimensional porous carbon material, a preparation method and application in adsorption of organic pollutants in a water body, and belongs to the technical field of water treatment.The preparation method comprises the steps that 1, zinc salt, 2-methylimidazole and a nitrogen source are dissolved in a methanol solution respectively, stirring reaction is conducted at the room temperature after mixing, standing is conducted, precipitates are taken, and a precursor solution is obtained; a precursor zeolite imidazate framework structure material is obtained; and 2, pyrolyzing the precursor zeolite imidazate skeleton structure material at 1100 DEG C under the protection of inert gas to obtain the three-dimensional porous carbon material. The three-dimensional porous carbon material disclosed by the invention has the advantages of large specific surface area, developed pore structure, abundant nitrogen-containing functional groups and reusability, can provide more adsorption active sites and enhance the electrostatic adsorption effect, and shows excellent adsorption performance and anti-interference capability on perfluorinated compounds, benzene series (such as benzene) and chlorinated organic compounds (such as parachloroaniline).

The invention discloses equipment and method for removing chromaticity of biochemical tail water in coal chemical sewage treatment, and relates to the technical field of sewage treatment.The equipment comprises a base, a quantitative batching device and a sedimentation device are installed on the base, fine coal gasification slag is contained in the quantitative batching device, a second connecting pipe is installed on the quantitative batching device and communicated with the sedimentation device, and the sedimentation device is communicated with the second connecting pipe; the fine coal gasification slag is led to the settling device, one side of the second connecting pipe is connected with a first connecting pipe, a solution barrel is arranged on the first connecting pipe, and sewage to be treated is contained in the solution barrel. According to the technical scheme, the coal gasification fine slag is used for adsorbing colored substances in sewage, the activated carbon has a developed pore structure and a huge specific surface area and can effectively adsorb chromaticity molecules, and the coal gasification fine slag which is originally regarded as waste is used, so that resource utilization of solid waste is realized, and the pressure on the environment is reduced.

The invention discloses a composite carbon molecular sieve and a preparation method thereof, and relates to the technical field of membrane separation. The invention discloses a preparation method of a composite carbon molecular sieve, which comprises the following steps: dipping a porous support in a coating solution, taking out, and drying to obtain a pretreated molecular sieve; carrying out carbonization treatment on the pretreated molecular sieve in an inert gas atmosphere to obtain a composite carbon molecular sieve; the porous support is firstly prepared to serve as a base membrane of the composite carbon molecular sieve, the mechanical strength of the molecular sieve is effectively improved, modified polyamide acid serves as a coating organic matter, the modified polyamide acid is attached to the surface of the porous support through an impregnation method, and the molecular sieve formed after the material is pyrolyzed and carbonized is loose in structure; the aperture adjustment of the molecular sieve is realized, and gas permeation and diffusion are facilitated.

The invention belongs to the technical field of graphene preparation, and discloses a preparation method of a modified graphene electrode material of a lithium ion battery and a related product, the method comprises the following steps: pre-mixing graphite powder and concentrated sulfuric acid, then adding an oxidant in batches, carrying out suction filtration after oxidation is completed, and washing to be neutral by using diluted hydrochloric acid and deionized water; deionized water is added into the washed graphite oxide, and after multi-stage ultrasonic treatment, a graphene oxide dispersion liquid is obtained through centrifugal separation; mixing the graphene oxide dispersion liquid with a predetermined amount of urea, carrying out a multi-step hydrothermal reaction, and then carrying out centrifugal cleaning and freeze drying to obtain nitrogen-doped modified graphene powder; the nitrogen-doped modified graphene powder and absolute ethyl alcohol are ground and mixed, the surface of a pretreated foamed nickel current collector is coated with the mixture through dip coating, compaction treatment is conducted, and the modified electrode material is obtained. According to the scheme, the conductivity and the cycling stability of the graphene electrode in the lithium ion battery can be improved.

The invention provides a preparation method of a spherical mesoporous carbon material. The method comprises the following steps: obtaining a sucrose solution; adding sodium polyacrylate into the sucrose solution; adding silica sol into the sucrose solution added with sodium polyacrylate, and uniformly mixing; adding concentrated sulfuric acid into the sucrose solution added with sodium polyacrylate and silica sol, uniformly mixing, and heating for reaction; washing the reaction product to be neutral, and then drying the reaction product; grinding the dried reaction product, and calcining in a nitrogen atmosphere; and eliminating the silicon template in the reaction product to obtain the spherical mesoporous carbon material. The invention also provides a spherical mesoporous carbon material and a method for simultaneously detecting diisopropylnaphthalene, polychlorinated biphenyl and a photoinitiator in paper for cigarettes. According to the preparation method of the spherical mesoporous carbon material, the prepared high-dispersity spherical mesoporous carbon material is developed in pore structure and high in specific surface area, more adsorption sites can be provided, and the mesoporous structure is beneficial to rapid diffusion of the material in a solution.

The invention discloses a waste gas treatment method in a sodium hypophosphite production process, and belongs to the technical field of hydrogen phosphide adsorption. The waste gas treatment method in the sodium hypophosphite production process is used for solving the technical problems that in the prior art, a hydrogen phosphide solid adsorbent is low in specific surface area and few in hydrogen phosphide adsorption sites, and the cyclic adsorption performance of the solid adsorbent on hydrogen phosphide needs to be further improved. Comprising the following steps: adding loaded modified carbon powder, modified diatomite, red mud, a foam stabilizer, sodium silicate and purified water into a reaction kettle, stirring at room temperature for 30-50 minutes, adding a foaming agent into the reaction kettle, and stirring for 30-60 seconds to obtain mixed slurry. According to the invention, the composite materials such as the loaded modified carbon powder, the modified diatomite and the red mud are mixed, and the dosage proportion of each component is optimized, so that the specific surface area of the adsorbent microsphere is effectively increased, and the adsorbent microsphere has excellent adsorption capacity and cyclic regeneration performance on hydrogen phosphide in waste gas.

The present invention provides a kind of lignite for honeycomb activated carbon and its quality improvement and modification method, honeycomb activated carbon, the quality improvement and modification method of lignite for honeycomb activated carbon, comprising the following steps: taking lignite powder, adding an aqueous solution of sodium borohydride, mixing evenly, performing a reduction reaction, and obtaining reduced lignite; mixing the reduced lignite with a thermal stability regulator, 9,10-dihydrophenanthrene, and N,N-dimethylformamide evenly, performing a swelling treatment, and obtaining swollen lignite; mixing the swollen lignite with aniline evenly, stirring the reaction, and obtaining lignite for honeycomb activated carbon. The lignite obtained by the quality improvement and modification method of the present invention for honeycomb activated carbon is not easy to return to white, is not easy to crack after being made into honeycomb activated carbon, has good mechanical strength, and has good thermal stability.

The present invention provides a biochar conditioner composite and a preparation method and application thereof, and relates to the technical field of soil conditioning materials. The biochar conditioner composite of the present invention comprises components by weight: 266-512 parts of biochar, 53-75 parts of humic acid, 9-15 parts of aluminum sulfate, 7-15 parts of calcium sulfonate, 5-15 parts of microbial agent and 2-8 parts of soil loosening agent; the specific surface area of ​​the biochar is 130-150 m 2 / g, with a particle size of 25-50 mesh; the biochar conditioner complex of the present invention is used in the restoration of moderately and severely saline-alkali soil, and has the functions of improving the physical and chemical properties of the soil, repairing the saline-alkali soil structure, reducing the soil bulk density, increasing the soil porosity and swelling, enhancing the soil's permeability and water holding capacity, and improving the soil's water and fertilizer retention properties.

The invention relates to the technical field of energy materials, and particularly discloses a preparation method and application of a composite catalyst for an iron-chromium flow battery electrode, tea residues are used as raw materials, a biochar precursor is obtained through a series of treatment, then the biochar precursor and sodium tungstate are subjected to ultrasonic mixing, then a hydrothermal method is adopted, and the composite catalyst for the iron-chromium flow battery electrode is obtained. And drying, roasting, washing and the like to obtain the composite catalyst. The composite catalyst which can be applied to the negative electrode carbon cloth of the iron-chromium flow battery is prepared by taking the organic solid waste as a base and combining the carbonized organic solid waste with sodium tungstate capable of promoting the improvement of the battery performance by utilizing the characteristic that the carbonized organic solid waste has a developed pore structure. When the catalyst is applied to a carbon cloth electrode of an iron-chromium flow battery, the hydrophilicity and conductivity of the carbon cloth can be well improved, the capacity retention ratio of the carbon cloth can be increased, and the improvement of the electrochemical performance of the battery is promoted.

The invention provides a modified graphite negative electrode material, a preparation method thereof and a lithium ion battery, and relates to the technical field of lithium ion battery graphite negative electrodes. The invention discloses a preparation method of a modified graphite negative electrode material. The preparation method comprises the following steps: S1, heating and uniformly mixing a lithium-containing compound, a soft carbon precursor or a hard carbon precursor in the atmosphere of protective gas to obtain a lithium-containing coating agent; s2, adding the lithium-containing coating agent in the step S1 into the graphite main body material, uniformly mixing, and sintering in the atmosphere of shielding gas to obtain a first modified graphite negative electrode material; and S3, uniformly dispersing the first modified graphite negative electrode material in the step S2 into deionized water, adding a hydrophobic surface modifier, uniformly stirring, standing, and drying to obtain the modified graphite negative electrode material. The lithium ion battery containing the modified graphite negative electrode material provided by the invention has excellent first efficiency, cycling stability, liquid absorption performance of a negative electrode and rate capability of a battery cell.

The invention discloses a preparation method and application of a biochar-based redox mediator material, and belongs to the technical field of water treatment. The invention relates to application of a biochar-based redox mediator material in degradation of organic pollutants in water by an enhanced chemical oxidation technology. The biochar-based redox mediator material prepared by the method disclosed by the invention has the characteristics of a redox mediator, can be used as an electron channel for mediating electron transfer between an oxidant and pollutants, and also has the advantages of large specific surface area, multiple active sites, high stability, low cost, greenness, no pollution and the like; the method is combined with a chemical oxidation method, so that organic pollutants in water can be quickly removed. The biochar-based redox mediator material prepared by the method has the advantages that the electron transfer rate between organic pollutants and an oxidizing agent is remarkably increased, and the biochar-based redox mediator material is simple to prepare, low in price, convenient to recycle, reusable and the like.

The present invention relates to an activated carbon for water treatment and a preparation method thereof, and belongs to the technical field of activated carbon. The preparation method comprises the treatment and activation of carbon materials, the grafting of hydrophobic groups, the grafting of long-chain flexible groups, and the cross-linking of silk protein suspension. Beeswax and other materials are used as raw materials, and sodium dodecyl sulfate and polyethylene glycol are used to perform hydrophobic modification and flexible long-chain grafting on the activated carbon. With the help of the structure of silk protein and glutaraldehyde cross-linking to form a stable intertwined network, a higher specific surface area and a more developed pore structure are obtained, the mechanical properties and durability of the activated carbon are improved, and its adsorption efficiency and stability in water treatment are further improved.

The present invention provides a kind of low-temperature activated activated carbon, preparation method and application, which belong to the field of activated carbon nanomaterials. The raw materials used are common and easily available industrial-grade products, the equipment is simple, the preparation process is simple, the repeatability is strong, and it is conducive to industrial large-scale production. The present invention provides a kind of low-temperature activated activated carbon, the activation temperature is relatively low, and the corrosion of the activator to the equipment is relatively small, which not only further reduces the cost of the product, but also is human and environmentally friendly, and can be widely used in water treatment, chemical catalysts and carriers, solvent recovery, oil decolorization, air purification and other fields. Compared with the existing commercially available activated carbon, the product prepared by the present invention has a large specific surface area, a more developed pore structure, and a lower iron content in the product. In addition, the product of the present invention can be used in the fields of heavy metal ion adsorption in aqueous solution, automobile exhaust purification, impurity removal of printing ink, gas separation, supercapacitor electrode materials and other electrochemical energy storage materials.

The invention discloses a preparation method of copper modified lignin carbon nanospheres, which comprises the following steps: adding lignin into tetrahydrofuran, uniformly dissolving, adding water, stirring to remove tetrahydrofuran, and carrying out hydrothermal reaction to obtain lignin nanospheres; zinc nitrate and copper chloride are added into water, and a solution A is obtained; adding adenine into DMF (Dimethyl Formamide) and heating until the adenine is dissolved to obtain a solution Adding lignin nanospheres into water, and ultrasonically dispersing uniformly to obtain a solution C; and adding the solution A into the solution B, then adding the solution C, continuously stirring, centrifuging, and freeze-drying. And drying, mixing and grinding with potassium bicarbonate, and then transferring into a tubular furnace for two-stage calcination to obtain the copper-modified lignin carbon nanospheres. The lignin nanospheres are prepared by adopting a solvent exchange method and are compounded with transition metal copper to realize high-added-value utilization of lignin, and the lignin nanospheres can be used for degrading water pollutants and water-based zinc ion batteries and have excellent degradation effect and electrochemical performance.

The invention provides a natural photocatalyst with an ultrahigh specific surface area as well as a preparation method and application thereof, and belongs to the technical field of sewage treatment. The preparation method comprises the following steps: culturing algae in a heavy metal polluted water body, carrying out sectional pore expansion on the obtained algae rich in endogenous metals, mixing a primary carbonized product with an activator, carrying out chemical regulation and control treatment to obtain a carbonized product, and sequentially washing and drying the carbonized product to obtain the natural photocatalyst. A natural raw material rich in endogenous active substances and rich endogenous mineral components such as Fe, Ni, Mn, Zn or Ti are prepared by utilizing the excellent biological enrichment effect of seaweed on heavy metals in a water body, the graphitization level of the catalyst is improved in the pyrolysis process, formation of an edge defect structure is promoted, the electron transfer capacity is remarkably improved, and the catalytic activity of the catalyst is improved. The catalytic performance of the catalyst is obviously improved, a preliminary carbonization product can be obtained through sectional pore expansion, and a carbon layer structure is twisted or deformed in the chemical regulation process, so that pores are formed. The specific surface area of the prepared natural photocatalyst reaches up to 3360.28 m < 2 > / g, the removal effect on organic dye is remarkable, the removal rate reaches 90% or above, and the purposes of resource utilization of seaweed solid waste and environmental protection can be achieved.

The invention discloses a coking wastewater purifying agent and a preparation method and application thereof, the purifying agent is prepared from the following raw materials in parts by weight: 20-25 parts of activated carbon, 18-25 parts of a compound, 4-9 parts of polyacrylamide, 1-5 parts of a surfactant and 60-90 parts of water, and the compound is prepared by compounding pear residues and modified shell carbon. The method is used for solving the technical problem that the coking wastewater cannot reach the discharge standard.

The invention discloses a multi-component co-pyrolysis biochar material taking mushroom dregs as a main component and a preparation method thereof, and the preparation method comprises the following steps: step 1, selecting gentamicin mushroom dregs as a main component, and wheat straw and kitchen waste as additives as substrates for preparing multi-component co-pyrolysis biochar; 2, optimizing the proportion of the three raw materials by using a mixed material design and a response surface model; step 3, performing pyrolysis at 550 DEG C, and performing oxygen-limited pyrolysis in a muffle furnace for 1 hour; 4, the yield and the specific surface area of the biochar serve as response indexes, and finally the optimal proportion of the three raw materials is obtained through model optimization. According to the prepared biochar material, the specific surface area and the pore structure of the biochar are remarkably improved, and the biochar material shows better application prospects in the fields of pollutant adsorption, soil improvement, environmental remediation and the like; through innovative raw material combination and process route, various key properties of the biochar are remarkably improved, and the biochar has wide market application value and scientific research significance.

The invention provides a capacitor electrode material and a preparation method and application thereof, and the capacitor electrode material comprises aluminum nitrate, potassium permanganate and activated carbon. According to the invention, aluminum nitrate and potassium permanganate are taken as modifiers, and act on activated carbon through multiple mechanisms such as oxidation, template effect and chemical activation, so that the specific surface area and porosity of the activated carbon are remarkably increased, and the adsorption capacity of the activated carbon to fluorine ions is improved.

The utility model discloses a recovery type tail gas emission detection mechanism which comprises an anti-skid foot pad and a detection device, the anti-skid foot pad is directly arranged on a road surface, a stabilizing mechanism is arranged below the outer side of the detection device, and the stabilizing mechanism comprises an anti-skid foot pad, a supporting rod, an automatic telescopic rod, a connecting rod, a supporting rod and a fixing ring. And fixing rings are clamped on the front side and the rear side of the outer part of the detection device. According to the recovery type tail gas emission detection mechanism, the stabilizing mechanism is arranged, so that the tail gas detection device cannot move due to the influence of external force, stable connection of the connecting hose is guaranteed, the situation of gas leakage is effectively prevented, meanwhile, the tail gas recovery mechanism is arranged, vehicle tail gas is recycled, energy consumption is reduced, and the service life of the vehicle is prolonged. In addition, an adjusting mechanism is arranged, and after the detection device is stabilized, if the position of the connecting pipe and the position of the tail gas pipe have certain deviation, the position of the connecting pipe can be rotationally adjusted.

The present invention relates to a concrete suitable for internal pouring of a steel lattice column and a construction method thereof, and belongs to the technical field of building concrete. The concrete suitable for internal pouring of a steel lattice column according to the present invention contains the following components by weight: 300-330 parts of silicate cement, 100-120 parts of fly ash, 730-750 parts of sand, 850-900 parts of gravel, 30-50 parts of modified coal gangue, 12-20 parts of composite admixture, 0.15-0.2 parts of air entraining agent, and 180-200 parts of water. The concrete prepared by the present invention has good fluidity, can be constructed for structures with dense steel bars, narrow space, and complex shapes, and is convenient to construct; the overall structure has a high density, and the volume stability is strong, and the curing shrinkage is reduced.

The utility model provides a sewage mud-water separation device, which relates to the technical field of separation devices and comprises a lifting mechanism, a stirring mechanism is fixedly mounted at the top of the lifting mechanism, and the stirring mechanism comprises a stirring box. According to the sludge-water separation device, under the cooperation of the lifting mechanism and the stirring mechanism, firstly, sewage passes through the filter plate, large-area sludge is filtered out, solid particles and liquid in the sewage can be effectively separated, and therefore the sludge-water separation efficiency is improved; sludge on the filter plate slides into the collection box, and then the motor operates to drive the spiral blade to rotate to stir sewage, so that the activated carbon can absorb impurities more sufficiently, abrasion and corrosion of the impurities and particles in the sewage to equipment can be reduced, and the service life of the equipment is prolonged; finally, the separated water is discharged through a pipeline by controlling a valve, so that the treatment time is shortened, and the efficiency of the whole sewage treatment process is improved.

The invention discloses a blast furnace flue gas dechlorinating agent prepared from red mud and a preparation method and application of the blast furnace flue gas dechlorinating agent, and belongs to the technical field of energy conservation and environmental protection. In the process, firstly, the red mud is calcined and ground into powder; and then adding silica sol and polyethylene glycol into the red mud powder, carrying out extrusion molding, and roasting to prepare the dechlorinating agent with certain strength. Compared with the conventional calcium oxide dechlorinating agent, the dechlorinating agent taking the red mud as the active component has the advantages of no pulverization, simple preparation process and low cost, and the red mud belongs to solid waste, so that the purpose of treating waste with waste can be realized when the dechlorinating agent is prepared from the red mud. The dechlorinating agent prepared by the method is used for removing hydrogen chloride in blast furnace gas, and has the characteristics of high removal rate, long penetration time and high chlorine capacity.

The invention discloses a method for improving methylene blue adsorption efficiency, which comprises the following steps: adding an adsorbent prepared by taking bagasse as a carbon source, urea as a nitrogen source and ZnCl2 as an activating agent into a methylene blue solution with a certain mass concentration, and adsorbing for a period of time to obtain a clear solution; the mass ratio of the urea to the bagasse is (1-3): 4, and the mass ratio of the ZnCl2 to the bagasse is 2: 1. In the research of adsorbents taking bagasse and urea as raw materials, the specific surface area of the porous carbon activated by ZnCl2 is obviously increased, the pore structure is developed, and when the porous carbon is applied to a methylene blue solution with the adsorption concentration higher than 50 mg / L, the adsorption rate can reach 70% or above, which is obviously superior to that in the prior art; particularly, the porous carbon material prepared under the conditions that the mass ratio of urea to bagasse is 62.5%, the carbonization temperature is 500 DEG C and the carbonization time is 2 hours has the best adsorption rate on 100-600 mg / L of methylene blue, and the adsorption rate can reach 92.5% or above.

The present invention discloses a cerium oxide sulfur-doped carbon aerogel microsphere and a preparation method and application thereof, and belongs to the technical field of heavy metal wastewater treatment. After mixing an aqueous phase containing phenolic monomers, trithiocyanate, aldehyde monomers and a catalyst with an oil phase containing a surfactant, a polymerization reaction is carried out under stirring. After the polymerization reaction is completed, solid-liquid separation, drying and carbonization treatment are carried out to obtain sulfur-doped carbon aerogel microspheres, and then cerium oxide is further loaded through a hydrothermal reaction to obtain cerium oxide-loaded sulfur-doped carbon aerogel microspheres. This method has the advantages of mild reaction conditions, simple operation, low equipment investment and operating costs; the obtained cerium oxide-loaded sulfur-doped carbon aerogel microspheres are used for the adsorption of heavy metal antimony in water bodies, and have the characteristics of high adsorption capacity and fast rate, and have good industrial application prospects.

The invention discloses a high-specific-surface-area porous carbon / sulfur composite material, a preparation method and application thereof, and an aqueous zinc-sulfur battery, and relates to the technical field of carbon materials. The method comprises the following steps: cleaning and drying a biomass precursor to obtain a pretreated precursor; then mixing with sulfate according to a ratio, and carrying out preliminary grinding and subsequent uniform ball milling to prepare a carbon / sulfur composite material precursor; and putting the carbon / sulfur composite material precursor into a tubular furnace, carbonizing in an inert atmosphere, and pickling to obtain the porous carbon / sulfur composite material with high specific surface area. The carbon / sulfur composite material with high sulfur content can be obtained by pickling the obtained three-dimensional porous carbon / sulfur composite material with hydrochloric acid, and the electrochemical and dynamic properties of the carbon / sulfur composite material are obviously superior to those of previously reported work. Due to the high-uniformity composite material, the mutually-crosslinked three-dimensional carbon nanostructure and the developed specific surface area, the obtained porous carbon material shows excellent electrochemical performance when being used as the positive electrode material of the water-based zinc-sulfur battery.

The invention provides a preparation method of sludge-based biochar for directionally enriching iron phosphate through synergistic modification of ferrous sulfate and sodium persulfate, and belongs to the technical field of harmless treatment and resource utilization of municipal sludge and environmental functional materials. According to the method disclosed by the invention, active phosphorus in the sludge is converted into a stable iron phosphorus compound in advance through oxidation-complexation dual effects of the ferrous sulfate heptahydrate and the sodium persulfate; the phosphorus-rich sludge is converted into more stable phosphorus-rich biochar through two-step heat treatment, the whole process of sludge pyrolysis is cooperatively regulated and controlled through Fe < 2 + > / S2O8 < 2->, integration of phosphorus release, phosphorus fixation and heavy metal passivation is achieved, the problem that in the prior art, the phosphorus retention rate is low is solved, phosphorus resources in the phosphorus-rich sludge are extremely retained and stabilized, and the phosphorus-rich sludge is obtained. The fixed rate of phosphorus in the modified sludge-based biochar with directionally enriched iron phosphate prepared by the method is greater than 99%.