9384results about "Carbon compounds" patented technology

The invention relates to a waste lithium iron phosphate battery recycling method, in particular to a graded recycling method for lithium, iron, phosphorus and graphite in a waste lithium iron phosphate battery, and belongs to the technical field of lithium ion batteries and resource recycling of the lithium ion batteries. According to the method, the mode that oxidizing roasting and selective leaching are combined is adopted, the leaching rate and selectivity of lithium are effectively improved, the leaching rate of the lithium element is close to 100% under the optimized condition, and limit recovery of the lithium element is achieved; meanwhile, aiming at the problem that iron and phosphorus in the leaching residues are difficult to utilize, a wet ball milling and secondary acid leaching method is combined, phosphorus and iron elements are separated from negative electrode graphite firstly, and graded recovery of iron, phosphorus and graphite is achieved. According to the method, the high recovery rate of lithium is realized, and meanwhile, high-added-value products such as ferric oxide and sodium phosphate are prepared by efficiently recovering ferric phosphate.

To provide a carbon dioxide absorbing composition that is capable of reducing the energy for releasing carbon dioxide and maintaining the carbon dioxide absorption capacity over an extended period.SOLUTION: A carbon dioxide absorbing composition comprises an amine compound (A) and a polyalkylene glycol (B) having a number average molecular weight of 140 or more, wherein the carbon dioxide absorbing composition contains a low molecular weight glycol compound (C) having a number average molecular weight of less than 140 in an amount of 0 to 10 wt.% based on the weight of the polyalkylene glycol (B), and the content of the polyalkylene glycol (B) is 50 wt.% or more and 80 wt.% or less based on the total weight of the amine compound (A), the polyalkylene glycol (B), and the low molecular weight glycol compound (C).SELECTED DRAWING: None

The invention provides a preparation method of a carbon-coated lithium iron manganese phosphate positive electrode material, and belongs to the technical field of battery positive electrode materials, and the preparation method comprises the following steps: co-precipitating a mixed solution of an iron source, a manganese source and a phosphorus source and a precipitant solution, and drying to obtain a manganese iron phosphate precursor; adding a lithium source, calcining in stages in an inert gas atmosphere, and grinding to obtain lithium manganese iron phosphate powder; the preparation method comprises the following steps: carrying out ball milling on lithium manganese iron phosphate powder and a fluxing agent, dispersing in a carbon source solution, uniformly wrapping a carbon source, drying, carrying out segmented calcination, and carrying out ball milling. The precursor nucleation coating uniformity is improved through segmented speed control reaction of a phosphorus source solution, a manganese source solution and an iron source solution; lithium source mixing and segmented calcination are adopted, and lithium volatilization is reduced; the modified nitrogen-doped porous carbon source is used for coating the lithium iron manganese phosphate powder to generate the lithium iron manganese phosphate positive electrode material, so that the conductivity of the lithium iron manganese phosphate positive electrode material is enhanced.

The present invention discloses a silicon-carbon negative electrode material with a gradient silicon concentration for lithium-ion batteries and a preparation method thereof. The silicon-carbon negative electrode material comprises graded porous carbon, nano-silicon and a coating layer. The graded porous carbon comprises an inner core porous carbon and an outer layer porous carbon. The pores of the inner core porous carbon are micropores, and the pores of the outer layer porous carbon are mesopores. Nano-silicon is distributed on the graded porous carbon in a gradient manner to form a silicon-carbon composite. The silicon concentration in the mesopores of the outer layer porous carbon is less than the silicon concentration in the micropores of the inner core porous carbon. The coating layer is a carbon layer, which is coated on the surface of the silicon-carbon composite. This gradient distribution of silicon concentration can effectively limit the volume expansion of silicon during battery cycling, reduce side reactions with electrolytes, and avoid the problem of silicon shells being easily generated on the porous carbon surface in a silicon-rich system. In addition, the dense carbon film on the outermost layer of the silicon-carbon negative electrode material further reduces the specific surface area of ​​the material and reduces the formation of SEI film.

The invention discloses metal element-doped nano silicon carbon as well as a preparation method and application thereof, and relates to the field of negative electrode materials. The nano silicon carbon takes porous carbon as a carbon skeleton, and the porous carbon is sequentially attached with nano silicon and coated with a carbon material layer through a chemical vapor deposition method; the porous carbon is prepared by carbonizing resin containing metal nitride after alkali activation and pore forming, and the resin containing the metal nitride is prepared by condensation polymerization of a phenolic compound, an aldehyde compound and the metal nitride in the presence of a catalyst. The porous carbon is doped with the metal nitride in the resin polycondensation process, the conductivity of the nano silicon carbon is effectively improved, the powder resistance is reduced, holes in the surface of the porous carbon provide more expansion space for deposited nano silicon, a carbon material layer formed by subsequent deposition and coating provides a protection effect, the reaction between silicon and an electrolyte can be inhibited, and the service life of the nano silicon carbon is prolonged. A stable SEI film is formed, the cycling stability of the material is improved, the volume expansion rate of a pole piece is inhibited, and the cycling life and the stability of the battery are improved.

To provide a manufacturing method for a carbon nanotube dispersion that can improve the dispersibility of carbon nanotubes.SOLUTION: The manufacturing method disclosed herein includes: a preparation step S1 of preparing a predetermined amount of carbon nanotubes and a solvent; and a mixing step S2 of dividing the predetermined amount of carbon nanotubes into at least three portions, adding each portion into the solvent, and mixing each time the portion is added.SELECTED DRAWING: Figure 1

The technical scheme of the invention relates to the technical field of data processing, in particular to a method for improving the rapid cooling efficiency of a high-temperature graphite furnace, and the method comprises the steps: carrying out the time axis normalization processing based on a cubic spline interpolation algorithm, combining an adaptive Kalman filter, fusing multi-source data, and generating a time-synchronized three-dimensional temperature field reconstruction matrix; the problem of temperature field reconstruction lag caused by insufficient time sequence alignment precision of multi-modal sensing data is solved. And the reinforcement learning network dynamically optimizes the control parameter weight through the residual feature map, preferentially corrects the deviation of the rotating speed of the induced draft fan and the gas injection angle in a high-error region, and feeds back the deviation to the thermodynamic simulation model for online iterative updating of the specific heat capacity parameters of the material, so that model prediction and dynamic calibration of the actually measured thermal field are realized. Through multi-source data alignment, closed-loop feedback and cooperative control architecture, the timeliness and execution precision of cooling path planning are remarkably improved, and the cooling efficiency and equipment reliability of the high-temperature graphite furnace are optimized.

The invention provides a low-concentration chemical-physical coupling intelligent continuous porous carbon production method and system. The method comprises the following steps: pretreatment: crushing a carbon source to obtain a carbon precursor; carbonizing: heating and carbonizing the carbon precursor in a fluidized bed reactor to obtain a carbonized product; chemical activation: dipping the carbonized product in a chemical activator solution to obtain a chemical activated product, and drying the chemical activated product; physical activation: mixing a reaction gas and an inert gas as an activation gas, placing the chemical activation product in the activation gas, and performing gas activation at a preset temperature to obtain a physical activation product; and post-processing. By coupling chemical activation with physical activation, the concentration of a chemical activation reagent can be reduced, and the wastewater amount and the pollutant concentration after reaction are reduced by reducing the dosage of the reagent, so that the wastewater treatment process is simplified, the treatment agent and energy consumption is reduced, and the treatment cost is reduced.

The invention discloses a porous carbon material, a preparation method thereof and a battery, and belongs to the field of battery materials. The particle size D50 of the porous carbon material is 4-25 [mu] m, the specific surface area measured by a multi-point BET method is 1000-2500m < 2 > / g, and the total pore volume is 0.5-1.2 cm < 3 > / g. The porous carbon material has the particle size, the specific surface area and the total pore volume in the range, has good structural stability, is beneficial to silicon deposition, improves the structural stability of the silicon-carbon negative electrode material after silicon deposition, and improves the capacity and the cycle performance.

The embodiment of the invention provides a method for directly trapping carbon dioxide from air. The method comprises the following steps: capturing carbon dioxide in air through an adsorber; after the carbon dioxide is captured, the interior of the adsorber is vacuumized for the first time; introducing water vapor into the adsorber to increase the pressure in the adsorber and increase the temperature of an adsorbent in the adsorber so as to desorb the carbon dioxide; the adsorber is vacuumized for the second time, and mixed gas formed by water vapor and carbon dioxide is obtained; and carrying out gas-liquid separation on the mixed gas to obtain carbon dioxide. The regeneration energy consumption of the adsorbent is reduced, and the concentration of the carbon dioxide product gas is improved.

The invention relates to the technical field of wave-absorbing materials. Specifically, the invention relates to a ferrite composite multi-walled carbon nanotube wave-absorbing material and a preparation method thereof. The invention also relates to electronic equipment containing the ferrite composite multi-walled carbon nanotube wave-absorbing material. The ferrite composite multi-walled carbon nanotube wave-absorbing material prepared by the invention comprises a ferrite magnetic material with magnetic loss and a multi-walled carbon nanotube material with electrical loss, and the composite material introduces multiple electromagnetic energy loss modes through unique structural design and component synergy, so that the wave-absorbing performance of the material is enhanced. In addition, the preparation method disclosed by the invention is simple in process, low in requirement on equipment, green and environment-friendly, and free from any toxic and harmful by-products.

The invention relates to a catalytically graphitized silicon-carbon composite material, a preparation method thereof and a lithium ion battery. The preparation method comprises the following steps: providing a porous carbon precursor, sequentially carbonizing, activating and pore-forming, pickling, washing to be neutral, passivating to remove impurities, and then crushing and grading to obtain a porous carbon substrate with the particle size D50 of 5-20 microns; adding a graphitization catalyst into the porous carbon substrate for blending, and carrying out heat treatment at 800-1000 DEG C for 2-6 hours for catalytic modification to obtain modified porous carbon; and putting the obtained modified porous carbon into a chemical vapor deposition reaction furnace, and depositing silicon particles to obtain the catalytically graphitized silicon-carbon composite material. Wherein the graphitization catalyst comprises any one or more of potassium ferrate, iron oxide, nickel oxide, boron, aluminum, titanium, Fe-Si alloy and P-Ni alloy. The graphite catalyst is added to perform catalytic graphitization modification on the porous carbon substrate, so that the energy density, the cycle life and the rate capability of the battery are remarkably improved, and the application requirements of the high-performance battery are met.

The invention provides a functional graded porous carbon microsphere and a preparation method and application thereof, the preparation method comprises the following steps: S1, mixing a soft template, a phenolic compound, a cross-linking agent and a basic catalyst, and reacting to obtain a thermosetting phenolic resin microsphere; s2, carrying out pre-carbonization treatment on the thermosetting phenolic resin microspheres to obtain a carbonized material; s3, performing physical activation on the carbonized material to obtain graded porous carbon microspheres; s4, performing heat treatment on the graded porous carbon microspheres to obtain functionalized graded porous carbon microspheres; the preparation method has the characteristics of simple process, environmental protection and economical efficiency, the functionalized porous carbon microspheres prepared by the method are uniform in morphology, and the pore volume, pore diameter and pore structure of the functionalized graded porous carbon microspheres can be accurately regulated and controlled, so that the functionalized graded porous carbon microspheres meeting application requirements are obtained.

The invention provides a biomass-derived spherical porous carbon material and a preparation method thereof, and a silicon-carbon negative electrode material and a preparation method thereof, and relates to the field of lithium ion batteries. The preparation method of the biomass-derived spherical porous carbon material comprises the following steps: carrying out pre-carbonization treatment on vinasse to obtain pre-carbonized vinasse, mixing the pre-carbonized vinasse with an acidic solution, and washing with water until the mixture is neutral to obtain pre-treated vinasse; mixing the pretreated vinasse with a pore-forming agent, a binder and water to prepare slurry, and performing spray drying on the slurry to obtain a spheroidized precursor; carrying out carbonization treatment on the spheroidized precursor; washing the carbonized spheroidized precursor with water until the spheroidized precursor is neutral, and drying the spheroidized precursor to obtain an intermediate; and activating the intermediate with water vapor to obtain the biomass-derived spherical porous carbon material. The material with a regular spherical and porous structure can be prepared, the material can be used for preparing a silicon-carbon negative electrode material with a stable structure, and the electrochemical performance of the silicon-carbon negative electrode material is improved.

The invention relates to the technical field of heat-conducting graphite materials, in particular to a POD precursor film, a POD-based graphite film and a preparation method of the POD precursor film, the POD-based graphite film and the preparation method of the POD precursor film. After the reaction is finished, obtaining an antioxidant modified aromatic polyoxadiazole polymer solution; the preparation method comprises the following steps: coating an antioxidant modified aromatic polyoxadiazole polymer solution with a wiped film, then carrying out solidification forming in a multi-stage coagulation bath, and finally neutralizing, washing and drying to obtain a POD precursor film; the coagulating bath is an aqueous solution of sulfuric acid and boron compounds and an aqueous solution of sulfuric acid. And carrying out carbonization treatment and graphitization treatment on the POD precursor film to obtain the POD-based graphite film. According to the preparation method, the boron element is cooperatively introduced into and out of the POD precursor film, so that the oxidation resistance of the graphite film is remarkably improved while the high thermal conductivity is maintained.

The invention discloses a porous carbon material applied to a silicon-carbon negative electrode as well as a preparation method and application of the porous carbon material, and belongs to the technical field of lithium ion batteries. Uniformly mixing asphalt and mixed acid, heating and fully reacting to obtain acid modified asphalt; dispersing the acid modified asphalt in deionized water to prepare an asphalt aqueous solution, sequentially adding melamine and KOH, uniformly dispersing to obtain a mixed solution, and drying to obtain precursor powder; carbonizing the precursor powder under the protection of nitrogen, and then introducing CO2 or water vapor or mixed gas of the CO2 and the water vapor for activation; and washing and drying the activated product to obtain the porous carbon material. The obtained material has excellent conductivity, stability and high silicon loading performance, and can be applied to the field of lithium ion battery negative electrode materials, a silicon-carbon negative electrode prepared by taking the porous carbon material as a carrier is applied to a lithium ion battery, and the technical effects of high capacity density and long circulation can be achieved.

The invention relates to the technical field of lithium battery negative electrode materials, and particularly discloses a resin-based self-activated porous carbon material and a preparation method and application thereof.The preparation method comprises the following steps that a diphenol monomer, a diphenol monomer containing thioether bonds, formaldehyde or polyaldehyde and a catalyst A are subjected to a condensation polymerization reaction, and phenolic resin is obtained; and carbonizing the phenolic resin to obtain the resin-based self-activated porous carbon material. The phenolic resin is synthesized by utilizing the diphenol monomer containing the thioether bond, so that a thioether alkane side chain is introduced into the phenolic resin, and in the carbonization process of the phenolic resin, because the thioether bond is extremely easy to decompose at high temperature to generate gas, a phenolic resin framework can be subjected to pore forming; the prepared resin-based self-activated porous carbon material has high specific surface area and pore volume, controllable design of the internal pore structure of the resin-based porous carbon can be realized by controlling the structure and modification proportion of the thioether alkane side chain, and ideal pore distribution is obtained.

The invention discloses a porous carbon material as well as a preparation method and application thereof, and the porous carbon material is prepared by the following steps: by taking a silicon dioxide mesoporous hollow sphere as a hard template through a hard template method, carrying out condensation reaction on phenol and formaldehyde in the hollow part of the silicon dioxide mesoporous hollow sphere to form phenolic resin; and curing, carrying out carbon activation treatment and etching to obtain the spherical phenolic resin porous carbon material. The porous carbon material prepared by the preparation method disclosed by the invention has a relatively high specific surface area and a relatively uniform pore structure, and the cycle performance of a secondary battery can be improved when the porous carbon material disclosed by the invention is used for preparing a negative pole piece and assembling the negative pole piece into the secondary battery.

The invention discloses a multi-layer plating process for optimizing surface characteristics of a base material, which is characterized by comprising the following steps of: pretreating the surface of a plated base material, improving the surface smoothness of the base material, and removing dirt on the surface of the base material; electroplating the base material by using the nickel pre-plating solution; chemical plating: the base material subjected to pre-plating treatment is placed in a chemical composite plating solution for chemical plating; the chemical composite plating solution comprises a basic plating solution and second-phase particles, the second-phase particles are nano niobium carbide, and the second-phase particles are wrapped and embedded into an alloy plating layer in the chemical plating process, so that the second-phase particles are distributed in plating layer matrix metal in a discrete mode to form a discontinuous phase. The hard particles niobium carbide are added and are dispersed and distributed in a coating substrate (Ni-P alloy), the hard particles can effectively refine the substrate metal, so that the hardness of the substrate metal is improved, and the niobium carbide hard phase particles are high in hardness, excellent in wear resistance, large in yield limit and high in pressure resistance.

This invention discloses a method for leaching lithium iron phosphate mixed powder with iron salts and recovering all components, belonging to the field of battery recycling. The invention uses an iron salt solution to leach the mixed powder, obtaining a lithium-containing leachate and leaching residue. Ferrous ions in the leachate are regenerated into ferric iron through acidification and oxidation, and recycled for leaching the next batch of mixed powder. After reaching a preset number of cycles, the leachate is used for re-leaching multiple batches of leaching residue to improve the lithium leaching rate. Ultimately, a enriched solution containing Li, Fe, Cu, and Al and graphite-containing iron phosphate residue are obtained. Copper is recovered from the enriched solution through iron powder replacement, and a high-purity lithium chloride solution is obtained through extraction and separation, while ferric chloride (recycled) and aluminum chloride crystals are also recovered. The leaching residue is treated with hydrochloric acid to obtain regenerated graphite, and the pH is adjusted with alkali to obtain high-purity iron phosphate. This method achieves full component recovery under mild conditions, reducing separation steps and chemical consumption through a "leaching-regeneration-leaching" cycle mechanism, thus achieving both environmental and economic benefits.

The invention provides porous carbon and a preparation method thereof, and a negative electrode active material and application thereof. The porous carbon has a brand new structural design, abundant pores and reasonable pore size distribution, and can be used for providing a negative electrode active material with relatively high capacity and relatively good long-cycle structure stability.

The invention belongs to the field of lithium battery electrode materials, and particularly relates to a silicon-carbon negative electrode material based on spherical starch porous carbon and a preparation method of the silicon-carbon negative electrode material. The preparation method comprises the following steps: carrying out esterification reaction on plant starch and an esterifying agent, carbonizing, crushing, activating with potassium hydroxide, pickling, and carrying out a vapor deposition silane technology to further prepare the silicon-carbon negative electrode material. The starch subjected to esterification reaction is used as a precursor, porous carbon is prepared through carbonization, activation and the like, the silicon-carbon negative electrode material is prepared through the vapor deposition silane technology, and the silicon-carbon negative electrode material not only has a spherical porous carbon skeleton, is low in volume effect and good in conductivity, but also is high in first charge and discharge capacity and first efficiency.

The present invention generally relates to a system for producing activated carbon from cow dung. The process begins with a drying and washing unit to pre-treat the raw material. Dried cow dung is then milled and sieved to a specific particle size. A second drying step prepares the sieved material for carbonization in a nitrogen atmosphere. The resulting carbonized material undergoes chemical activation using a sodium hydroxide solution. Subsequent pyrolysis in a nitrogen environment further develops the pore structure of the activated carbon. The pyrolyzed material is then washed with hydrochloric acid to remove impurities. A final drying step yields the desired activated carbon product, which is then crushed. This system provides a controlled and efficient method for converting cow dung into valuable activated carbon, offering a sustainable waste management solution and a source of high-quality material for various applications.

The invention belongs to the technical field of biomedical engineering, and particularly relates to a single-base resolution laminated two-dimensional material nanopore structure, a DNA sequencing device and a DNA sequencing method. The two-dimensional material nanopore structure comprises an insulating layer and conducting layers arranged on the upper side and the lower side of the insulating layer, through nanopores are formed in the insulating layer and the conducting layers, and the pore diameter of the nanopores is 2-5 nm; the insulating layer and the conductive layer are made of two-dimensional materials. The conductive layers on the two sides serve as upper and lower electrodes, and a power supply is connected between the upper and lower electrodes to form a phase conductive path which is provided with a longitudinal current detection element. A plurality of groups of two-dimensional material nanopore structures are stacked, and meanwhile, a plurality of groups of base pair signals are obtained. According to the invention, the advantages of small thickness, high physical strength and the like of the two-dimensional material nanopore are kept by using a few layers of two-dimensional material films, the vibration of the films is reduced by increasing the number of layers and improving the mechanical strength, so that the signal-to-noise ratio is improved, and the spatial resolution of the nanopore sensor is improved by designing the upper electrode and the lower electrode.

The invention provides a preparation method and application of a petroleum asphalt-based porous carbon material, and belongs to the technical field of porous carbon materials. The preparation method comprises the following steps: by taking petroleum asphalt as a carbon precursor, stirring and pre-oxidizing the petroleum asphalt and molten salt at a certain temperature, then pre-carbonizing, washing away the molten salt, and carbonizing with KOH to prepare the petroleum asphalt-based porous carbon material. The petroleum asphalt with low carbon yield (11%) is converted into the petroleum asphalt-based porous carbon material with obviously improved carbon yield (up to 30%) through an efficient and convenient method. When the petroleum asphalt-based porous carbon material prepared by the method provided by the invention is used as an electrode material of a lithium ion battery / zinc ion capacitor, the petroleum asphalt-based porous carbon material shows excellent electrochemical performance.

The invention discloses a multi-stage carbon dioxide capture and utilization method and device. CO2-containing high-temperature flue gas enters an adsorption reactor and passes through the adsorption reactor filled with a bifunctional catalyst, and CO2 in the flue gas is adsorbed and captured by a catalytic material in a catalyst bed layer; decarburized gas comes out of the adsorption reactor, exchanges heat with process gas from the conversion reactor in a heat exchanger, and enters the next stage of adsorption reactor after heat exchange, when the adsorption reactor reaches the saturated adsorption capacity of an adsorbent, CO2-containing high-temperature flue gas is switched to enter the first stage of conversion reactor, at the moment, reducing gas enters the adsorption reactor, and the CO2-containing high-temperature flue gas enters the second stage of conversion reactor; and the converted synthesis gas is sent out of the device. By means of the technical process, the energy utilization rate can be fully increased, the emission reduction cost can be effectively reduced, high energy consumption caused by trapping cooling / conversion heating can be avoided, and the problems of high cost for purification and transportation after CO2 capture and potential safety hazards caused by burying are solved.

The present invention relates to: an electrochemical biosensor capable of effectively and sensitively detecting alfuzosin; an electrode applied thereto; a metal-organic framework (MOF) which includes a zinc / cobalt oxide and is applied in manufacturing the electrode; and methods for manufacturing same.

The invention relates to a carbon dioxide capture integrated system which comprises a carbon dioxide lean flue gas rear-end treatment unit, a carbon dioxide rear-end treatment unit and a plurality of integrated modules connected in parallel, the integrated module comprises at least one reactor, each reactor comprises a conductive shell, a heating part and a reaction cavity used for containing a solid adsorption material, and the heating parts are arranged outside the conductive shells and conduct heating in an electromagnetic heating mode. The inner diameter of the reactor is 300-500 mm, and the height of the reactor is 2.5-3 times of the inner diameter. The reactor has an adsorption mode, a desorption mode and a shutdown mode which can be switched; the number of the integrated modules can be adjusted according to the carbon dioxide capturing requirement. According to the system, the installation number of the small integrated modules can be flexibly adjusted according to the carbon dioxide trapping requirement, the carbon dioxide trapping requirements of different scales are met, electromagnetic heating is adopted, rapid and uniform heating of the solid adsorption material is effectively achieved, the power consumption of the system is greatly reduced, and then the trapping efficiency and economical efficiency of the system are improved.

The invention relates to the technical field of dispersing agents, and particularly discloses a high-concentration water-based graphene dispersing agent. The high-concentration water-based graphene dispersing agent is prepared from the following raw materials in parts by weight: 25 to 30 parts of a modified nonionic surfactant, 8 to 12 parts of sodium lignin sulfonate, 0.4 to 0.8 part of a de-foaming agent and 90 to 100 parts of de-ionized water, the modified nonionic surfactant is prepared by the following steps: carrying out dehydration esterification reaction on 1-pyrene butyric acid and N-hydroxysuccinimide, carrying out nucleophilic substitution reaction on the obtained product and polyethylene glycol monododecyl ether to obtain modified 1-pyrene butyric acid, and finally polymerizing the modified 1-pyrene butyric acid and n-butyl acrylate. The method is easy to operate, graphene does not need to be subjected to oxidation reduction, the integrity of a graphene sheet layer can be completely kept, and the performance of the graphene can be fully exerted; the prepared graphene dispersing agent realizes efficient dispersing effect, excellent stability and environment-friendly safety characteristics, and provides solid technical support for wide application of graphene in multiple fields.

The invention provides a preparation method and application of a coal tar residue-based porous carbon sheet material, and relates to the technical field of solid waste utilization. According to the coal tar residue-based porous carbon sheet material, an organic reagent is used as an extracting agent, and oily components in coal tar residues are separated by adopting a microwave-assisted extraction method; the extracted coal tar residues and K3C6H5O7 are subjected to ball-milling mixing and then mildly activated in an inert atmosphere, and the K3C6H5O7 is obtained through washing, drying and grinding; and the coal tar residue-based porous carbon sheet material can be applied to treatment of Tl (I)-containing wastewater. The coal tar residue-based porous carbon sheet material prepared by the invention has an ultrahigh specific surface area and rich oxygen-containing functional groups, and shows efficient and rapid removal performance on Tl (I) in wastewater.