48 results about "Hummers' method" patented technology

The invention provides a preparation method of a graphene carbon nanofiber film for oil-water separation, and relates to the field of oil-water separation membranes, and the preparation method comprises the following steps: mixing polyacrylonitrile powder and an N, N-dimethylformamide solution to obtain an electrostatic spinning solution; spinning through an electrostatic spinning machine to obtain a polyacrylonitrile fiber membrane; coating the polyacrylonitrile fiber film with the prefabricated graphene oxide dispersion liquid to obtain a graphene oxide / polyacrylonitrile composite film; carrying out pre-oxidation, activation and carbonization treatment on the composite film to obtain a graphene carbon nanofiber film; according to the method, the waste isostatic pressing graphite which is low in price and easy to obtain is adopted as the raw material, the ammonia activation means is combined, improvement is carried out on the basis of a Hummers method, graphene oxide is prepared, resource recycling is achieved, the isostatic pressing graphite waste generated in the production process is recycled and processed into a product with a high additional value, and therefore the purposes of reducing the production cost and saving resources are achieved.

The invention belongs to the technical field of semiconductor oxide gas sensors, and particularly relates to an rGO / CuO / Li sensitive material, a preparation method thereof and application of the rGO / CuO / Li sensitive material in H2S sensors. The preparation method comprises the following steps: firstly, preparing a graphene oxide nanosheet by using an improved Hummers method, and then preparing the rGO / CuO / Li sensitive material by using copper nitrate, lithium chloride and the prepared graphene oxide nanosheet as raw materials, polyvinylpyrrolidone as a surfactant and N, N-dimethylformamide as a solvent by using a one-step solvothermal method. Under the condition of room temperature, the sensitive material shows a relatively high response value (220.1) and a relatively low detection lower limit (1ppb) on hydrogen sulfide, has good selectivity, repeatability and stability, and has a wide application prospect in trace-level hydrogen sulfide detection in the fields of industrial safety and atmosphere detection.

The invention provides an MXene synergistic composite phase change heat storage material and a preparation method thereof, and belongs to the technical field of phase change heat storage materials. Comprising the following steps: reacting graphite with mixed acid and potassium permanganate through an improved Hummers method, and carrying out centrifugal washing, dialysis and drying to obtain graphene oxide GO powder, dispersing MXene and the graphene oxide GO powder in deionized water, performing ultrasonic treatment, stirring and mixing, adding nanocellulose CNF and citric acid CA, continuing stirring, and performing directional freezing and freeze drying to obtain three-dimensional aerogel; the three-dimensional aerogel and molten paraffin are compounded through vacuum impregnation, and the MXene-based composite phase change heat storage material is obtained. The MXene-based composite phase change material prepared by the invention has high mechanical strength, can effectively prevent leakage during phase change of the organic PCMs, still keeps higher load rate and stable structure and shape after multiple cycles, and can be applied to the fields of microminiature thermal management and the like.

The invention relates to the field of fuel cell anode catalysts, in particular to a preparation method of a Pd / h-BNNSs / rGO composite catalyst for a direct ethanol fuel cell, which comprises the following steps: taking reduced graphene oxide (rGO) as a substrate and compounding 5-20% by mass of hexagonal boron nitride nanosheets (h-BNNSs) to form a composite carrier; palladium (Pd) nanoparticles accounting for 16 + / -0.5 wt% of the total mass of the catalyst are loaded on the catalyst; the preparation method mainly comprises the following steps: preparing graphene oxide (GO) by an improved Hummer method, carrying out ultrasonic dispersion on GO and h-BNNSs, carrying out hydrothermal reaction at 180 DEG C for 6 hours, carrying out freeze drying to prepare a composite carrier, and loading Pd by a NaBH4 reduction method. The catalyst shows excellent performance on ethanol electrooxidation in an alkaline medium, has an electrochemical active area up to 202.31 m < 2 > / g, peak current density (5.9 times of commercial Pd / C) of 5549.0 mA / mg, excellent stability that activity attenuation is only 50% after 300 cycles, and remarkably improved CO poisoning resistance (the Jf / Jb ratio reaches 1.35), and shows strong industrial application potential.

The application discloses a graphene dispersion liquid and a preparation method thereof, relates to the field of graphene dispersion liquid and a preparation method thereof, and aims at solving the technical problem that it is difficult to obtain a high-concentration stable graphene dispersion liquid at present. In the dispersion liquid, graphene is obtained by reduction of graphene oxide prepared by a Hummers method, and then is uniformly dispersed into N-methyl pyrrolidone under the assistance of dispersants of sodium polystyrene sulfonate and polydiallyldimethylammonium chloride. The application is used for preparing the graphene dispersion liquid.

This invention discloses an interlayer confined piezoelectric composite film of graphene oxide, its electric field-driven preparation method, and its application. The preparation method includes: preparing a graphene oxide dispersion using the Hummers method and filtering it to form a graphene oxide film; placing the graphene oxide film in an electric-driven device, introducing different precursor solutions on both sides of the film, and driving the precursor components to migrate into the interlayer confined space of the graphene oxide under the action of an applied electric field; under the synergistic effect of electric field driving and interlayer confinement, the precursors entering the interlayer react and crystallize in situ to form a piezoelectric functional phase. The prepared composite film can generate piezoelectric polarization under mechanical stimulation conditions and can be used for ion selective adsorption / separation, especially suitable for the selective adsorption / separation of uranium and vanadium ions in high-salt water systems. This invention achieves a synergistic improvement in interfacial charge regulation and ion selectivity regulation by constructing a piezoelectric functional phase in situ within the interlayer confined space of graphene oxide.

The invention discloses a preparation process of graphene oxide liquid phase coated nano silicon. The preparation process comprises the following steps: S1, preparing modified nano silicon; s2, preparing a graphene oxide dispersion liquid; step S3: construction of a pre-coating system; s4, carrying out dynamic liquid phase coating reaction; step S5, post-treatment and purification; nano silicon is modified before coating, amino active groups are introduced to the surface of the nano silicon through gamma-aminopropyltriethoxysilane and can interact with carboxyl and hydroxyl on the surface of graphene oxide, the interfacial compatibility of the nano silicon and the graphene oxide is remarkably improved, and the binding force between a coating layer and the nano silicon is enhanced; the falling of the coating layer in the charging and discharging process is effectively inhibited; according to the preparation method, the graphene oxide is prepared by adopting an improved Hummers method, the dispersing agent is added, a stirring-ultrasonic dispersion process is combined, and meanwhile, the temperature in the ultrasonic process is controlled, so that the dispersity of the graphene oxide is effectively improved, agglomeration of the graphene oxide is avoided, and a foundation is laid for subsequent uniform coating.

The invention discloses a preparation method of a floating type cocatalyst and application of the floating type cocatalyst in Fenton reaction. Nano tungsten sulfide prepared by a hydrothermal method and graphene oxide prepared by a Harmer method are used as raw materials, and the floating type cocatalyst is synthesized by a simple impregnation method. The prepared cocatalyst (MS-WS2-GO) can effectively promote the circulation rate of Fe < 3 + > / Fe < 2 + >, the cocatalysis Fenton-like system can achieve the removal effect of 90% or above on organic pollutants in water only under the condition that 0.5 mM H2O2 and 20 mg / L FeSO47H2O are added, and the system does not generate iron mud. The MS-WS2-GO / Fenton small-scale test system constructed by the invention is continuously operated for 31 days, and the degradation rate of sulfamethoxazole is still kept to be 100% or above. The preparation process of the floating type cocatalyst is mild in condition, simple and convenient to operate and easy to implement.

The invention relates to the technical field of sodium batteries, and discloses a coal-based composite sodium battery negative electrode material and a preparation method thereof.The preparation method comprises the following steps that S1, anthracite is subjected to supercritical CO2 treatment, and a treated body is obtained and mixed with nano antimony oxide; s2, heating the mixture to obtain coal-based graphite; s3, the coal-based graphite is treated through a Hummers method, and the composite material is obtained. According to the method, the pore structure of the anthracite is regulated and controlled in a supercritical CO2 mode, then the nano antimony oxide is doped into pores of the anthracite, the anthracite is charred during subsequent firing and can better wrap antimony, meanwhile, the pore structure and connectivity of the coal are improved by the supercritical CO2, and the volume expansion of the antimony oxide can be greatly relieved. After the treatment, the graphene / Sb composite material formed by oxidation reduction and ultrasonic exfoliation of the graphite can enable the combination of graphene and antimony to be tighter, so that the electrochemical performance is better.

The invention relates to a natural latex / graphene aerogel composite material for oil-water separation and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing graphene oxide by an improved Hummers method, and then preparing the natural latex / graphene aerogel by combining a hydrothermal self-assembly method, a bubble template method and a freeze-drying method. And then adjusting the use amount of the natural latex and process parameters to optimize the performance of the natural latex / graphene aerogel, thereby preparing the natural latex / graphene aerogel with optimal performance. The preparation method has the beneficial effects that the problem of oil-water separation performance is solved, excellent adsorption performance is shown on organic reagents (ethanol, n-butane, liquid paraffin, trichloromethane, xylene, kerosene, edible oil, cyclohexane and the like), and the adsorption range is 43.82-189.86 g / g; after 10-20 times of cycle tests, the thickness recovery rate and the absorption capacity are still 92% or above of the initial value.

The invention discloses a waste graphite material recovery method, which comprises: 1, mixing concentrated sulfuric acid and sodium nitrate under a first reaction condition, uniformly stirring, sequentially adding a waste graphite material and potassium permanganate, and uniformly stirring to obtain a solution A; 2, stirring and diluting the solution A under a second reaction condition, a first reaction condition and a third reaction condition in sequence, and adding peroxide to obtain a solution B; 3, stirring the solution B under a first reaction condition, performing suction filtration, and sequentially performing acid pickling and drying on filter residues to obtain a graphene oxide material; and 4, heating the graphene oxide material in inert gas, and cooling to room temperature to obtain the recycled reproduced graphene. Compared with the prior art, according to the recycling method, the improved Hummers method is adopted for recycling the waste graphite material, impurities are removed, the prepared graphene oxide has larger interlayer spacing and richer oxygen-containing functional groups, meanwhile, efficient recycling of resources is achieved, the regenerated graphene can be used as a battery conductive agent, and the resource utilization efficiency is remarkably improved.

This invention provides a method for preparing graphene quantum dots based on thermal coal and a plasma reaction system, belonging to the field of graphene quantum dot preparation technology. The method includes the following steps: using thermal coal as raw material, it undergoes electrochemical oxidation and KOH ball milling sequentially to obtain pretreated coal; the pretreated coal is introduced into an axial magnetic rotating microwave plasma reactor for segmented temperature-controlled dissociation and recombination reactions; during the reaction, a porous alumina template is used for confined growth, and after the reaction, liquid nitrogen quenching is employed to obtain graphene quantum dots. This invention uses thermal coal to replace high-purity graphite as the carbon source, reducing raw material costs by more than 99%; the pretreatment process, through the synergistic effect of electrochemical oxidation and KOH ball milling, eliminates the need for strong acids and alkalis throughout, completely avoiding the pollution problems of large amounts of acidic and heavy metal-containing wastewater and waste gas generated by the traditional Hummers method, thus aligning with the concepts of green chemistry and sustainable development.

This invention provides a method for preparing a graphene oxide-based interpenetrating polymer network (IPN) hydrogel, which mainly includes the following steps: First, graphene oxide is prepared using a modified Hummers method; then, using acrylic acid as a monomer and graphene oxide as a framework, a polyacrylic acid / graphene oxide IPN hydrogel is obtained by polymerization; utilizing the amino groups on the graphene oxide as active sites, pyrrole is grafted onto the IPN hydrogel to obtain a polyacrylic acid / graphene oxide-grafted polypyrrole IPN hydrogel; the graphene oxide-based IPN hydrogel can be used as an electrode material for flexible supercapacitors.

On the basis of synthesizing graphene oxide by a conventional Hummer method, graphene with a complete lamellar structure is prepared by adopting a 2-5 DEG C temperature control mode, and graphene nanoplatelets are shaped and partially reduced through laser pulses to improve the crystallinity of the graphene nanoplatelets, so that the complete lamellar structure and an aramid fiber raw material are found; substances such as phenylenediammonium, diamine containing a heterocyclic structure, 2-(4-aminophenyl)-5-aminobenzimidazole and the like can form a very stable acting force, so that the modification of the graphene is realized. The problem that impurities are introduced due to the fact that a surfactant needs to be added in the process of compositing the materials is indirectly solved, the raw material of aramid fiber is not used as a surfactant originally, and due to the fact that the adding amount of graphene is very small (0.01%-0.1%), the graphene is used for modifying phenylenediamine, diamine containing a heterocyclic structure, 2-(4-aminophenyl)-5-aminobenzimidazole and other substances.

The invention relates to a graphene oxide modified cement-based capillary crystalline coating and application thereof, and relates to the technical field of concrete durability protective materials. The coating comprises a cement-based gelling component, a capillary crystalline active component, a filler component and a graphene oxide dispersion system, graphene oxide is prepared through an improved Hummers method and subjected to composite stabilization treatment through a polycarboxylic acid water reducer, and it is ensured that the graphene oxide is stably dispersed in a high-alkali and high-calcium environment; during construction, the components are mixed in proportion to prepare slurry, the surface of the pretreated concrete is coated with the slurry, and the slurry is cured to form a compact protective layer. Under the condition that a conventional construction technology is not changed, the carbonization resistance of the concrete can be remarkably improved, and the method is suitable for durability protection and repair of various concrete structures.

The application discloses a method for preparing a graphene double-layer heterogeneous wave-absorbing structure based on fused deposition 3D printing, and relates to the technical field of wave-absorbing materials. The method comprises the following steps: original graphene is oxidized by adopting a Hummers method, and then macromolecular chains are grafted through derivative modification to obtain modified graphene; printing wire materials of a wave-transparent layer are prepared from the modified graphene; printing wire materials of a wave-absorbing layer are prepared from the original graphene and the modified graphene; the printing wire materials of the wave-transparent layer are used to print and prepare a wave-transparent layer cube with the modified graphene oriented along an X-0° direction, then the wave-transparent layer cube is cut perpendicularly to the X direction to obtain a flat plate with the modified graphene oriented along a Z-0° direction; and the flat plate is used as a substrate, and the printing wire materials of the wave-absorbing layer are used to print and prepare a wave-absorbing layer cube with the original graphene and the modified graphene both oriented along an X-Y direction on the substrate, so that the double-layer heterogeneous wave-absorbing structure is obtained. The structure of the application exhibits excellent wide-frequency wave-absorbing capacity under low graphene content, and has excellent mechanical properties.

The application discloses a preparation method of graphite oxide and graphene oxide, which comprises the following steps: (1) adding a nitric acid compound, concentrated sulfuric acid and graphite into a reaction system first, then adding a defect manufacturing agent, and reacting for 10-20 minutes at a temperature of 40-80 DEG C; according to the mass, the adding proportion of the concentrated sulfuric acid, the defect manufacturing agent and the graphite is 80-100:0.3-0.1:1, and the adding amount of the nitric acid compound is 10-40% of the solute H2SO4 of the concentrated sulfuric acid; the defect manufacturing agent is a high-valence salt or high-valence oxide of a vanadium group, a chromium group or a manganese group metal; (2) continuously adding 2-5 parts of an oxidant according to the mass of the graphite, and reacting for no less than 6 hours at the same reaction temperature to obtain graphite oxide. The Hummers method is improved, the use amount of a strong oxidant is greatly reduced, the oxidation performance requirement of the oxidant is lowered, the reaction process is more gentle, and the obtained graphite oxide can be ultrasonically stripped to obtain graphene oxide, and the post-processing is simple.

The application belongs to the field of waste lithium ion battery recycling, and discloses a method for preparing an iron-doped graphene catalyst by using waste lithium iron phosphate batteries, which comprises the following steps: discharging, disassembling and separating the waste lithium iron phosphate batteries to obtain lithium iron phosphate powder and graphite; obtaining a lithium and iron-containing precursor solution by acid leaching and oxidizing the lithium iron phosphate powder; adjusting the pH to obtain an iron hydroxide precipitate; co-heating and reducing the iron hydroxide precipitate with the graphite to obtain elemental iron; preparing graphite oxide from the graphite by using the Hummers method; reducing the graphite oxide at high temperature to obtain graphene; and realizing iron doping by high-temperature solid-phase synthesis; realizing good industrial catalysis by the nanoscale complex effect of iron and graphene; and successfully realizing application in Li-CO2 batteries, with excellent catalytic effect, and the remaining lithium precursor solution in the reaction can be further used to extract lithium. According to the treatment method, the process is simple, the operation is simple, a high-value chemical catalyst can be obtained, and the economic benefit is high.

The application discloses a method for preparing high-strength pure graphene fibers by using Tesla valve microchannels, and the method comprises the following steps: preparing graphene oxide by an improved Hummers method, layering and centrifugal separating the graphene oxide by peeling, and concentrating to obtain a graphene oxide aqueous solution; adding a DMF solvent into the graphene oxide aqueous solution, stirring uniformly, and then centrifugal separating to obtain a DMF solution of the graphene oxide; performing microfluid wet spinning on the DMF solution of the graphene oxide by using a Tesla valve microchannel to obtain graphene oxide fibers; and performing a reduction reaction on the graphene oxide fibers, and the high-strength pure graphene fibers are obtained. The special structure of the Tesla valve microchannel is combined with the wet spinning technology, the preparation of the high-orientation high-strength pure graphene fibers is successfully realized, and the problem of low fiber orientation in the traditional fiber preparation method is effectively overcome by optimizing the microfluid wet spinning process and post-processing technology.

This disclosure relates to a method for preparing manganese-based adsorbent materials and graphite oxide. The method includes: preparing graphite oxide using a modified Hummer method; performing solid-liquid separation on the obtained material to obtain a filtrate and graphite oxide; and subjecting the filtrate to hydrothermal treatment under hydrothermal autogenous pressure and atmosphere to recover the solid phase material, thereby obtaining the manganese-based adsorbent material. The preparation method of this invention, due to the higher amount of potassium permanganate used in the modified Hummer method, eliminates the need for adding a manganese source, thus reducing preparation costs. The manganese-based adsorbent material prepared by this invention exhibits excellent performance in hydrogen purification reactions, achieving the removal of macro-sulfides (volume content > 0.1%) from hydrogen at temperatures below 50°C. The purified hydrogen can then be directly used for fuel cell hydrogen supply.

The invention provides a power coal-based graphene quantum dot preparation method and a plasma reaction system, and relates to the technical field of graphene quantum dot preparation, and the method comprises the following steps: using power coal as a raw material, and sequentially carrying out electrochemical oxidation treatment and KOH ball milling treatment to obtain a pretreated coal material; introducing the pretreated coal material into an axial magnetic rotation microwave plasma reactor, and carrying out dissociation and recombination reaction under segmented temperature control; in the reaction process, a porous aluminum oxide template is used for carrying out confined growth, and liquid nitrogen quenching treatment is adopted after the reaction is finished, so that the graphene quantum dots are obtained; the power coal is used for replacing high-purity graphite as a carbon source, so that the raw material cost is reduced by 99% or above; in the pretreatment process, through the synergistic effect of electrochemical oxidation and KOH ball milling, strong acid and strong alkali are not needed in the whole process, the pollution problem that a large amount of waste water and waste gas containing acid and heavy metal are generated through a traditional Hummers method is thoroughly avoided, and the concept of green chemistry and sustainable development is met.

The invention discloses a phenylamino carborane / graphdiyne oxide synergistically modified polyimide film and an in-situ polymerization method thereof, and belongs to the technical field of functional polymer film materials. The preparation method comprises the following steps: oxidizing gamma-graphdiyne through a Hummers method, modifying with phenylamino carborane, adding into a polyimide precursor, modifying polyamide acid with phenylamino carborane / graphdiyne oxide through covalent bond combination, and finally carrying out thermal imidization treatment to obtain the phenylamino carborane / graphdiyne oxide synergistically modified polyimide film. The phenylamino carborane is chemically bonded with an oxygen-containing functional group of the graphdiyne oxide through an amino group, so that the problems that the graphdiyne oxide is easy to agglomerate and non-uniform in dispersion are solved; then covalent bond modification is formed with anhydride groups on a polyimide precursor, and a phenylamino carborane-rigid framework is introduced into a polyimide molecular chain, so that the heat-resistant stability and the tribological property of the material are remarkably improved. The prepared film can be used in the fields of aerospace high-temperature coatings, flexible electronic packaging and the like.

The invention provides positive electrode slurry and a preparation method thereof, a pre-lithiated positive electrode and a battery, and relates to the field of lithium ion batteries. According to the positive electrode slurry provided by the invention, the compound of lithium oxalate wrapped by graphene or a derivative of graphene is compatible with the catalyst, the wrapping material is selected from one of graphene oxide, fluorinated graphene and hydrogenated graphene, and the wrapping layer can prevent lithium oxalate from caking, can improve the conductivity and remarkably improves the first charge specific capacity of the battery. And the coating can be prepared on a large scale through a liquid phase treatment method, such as a Hummers method and the like. The method is relatively simple, low in cost and high in economic benefit, and can be carried out on a chemical production line or in production equipment, so that industrial production is realized.

This invention relates to the field of lead-acid battery technology, and discloses a negative electrode paste for lead-acid batteries containing heterogeneous graphite and composite additives, and its preparation method, solving the problems of uneven graphite dispersion, weak interfacial bonding, stress concentration in the negative electrode grid, and short battery cycle life in the prior art. The negative electrode paste is based on lead powder and contains 0.5%~1.5% nano-scale thin-layer heterogeneous graphite, 0.5%~2.0% barium sulfate, 0.1%~1.0% carbon black, 0.1%~0.5% sodium lignosulfonate, 0.1%~0.15% polycarboxylate superplasticizer, and 0.05%~0.2% short fibers. The preparation includes: preparing nano-scale thin-layer heterogeneous graphite by modifying the nano-scale thin-layer with a silane coupling agent using a modified Hummers method combined with intermittent ultrasonic exfoliation; preparing the lead paste by adding acid in batches under vacuum stirring; applying the paste by vacuum atomization; and three-stage low-temperature curing of the negative electrode grid. This invention achieves the synergistic effect of composite additives to construct a stable three-dimensional conductive network. The prepared lead paste enables the battery to have a cycle life of ≥800 cycles, a capacity retention rate of ≥85% after 800 cycles, and a capacity retention rate of ≥80% at a low temperature of -18℃.

The invention discloses a method for preparing a high-conductivity lithium battery copper foil through hydroxylation modified graphene co-deposition, which comprises the following steps: S1, synthesizing graphene oxide by adopting an improved Hummers method: in an ice bath, adding natural graphite and NaNO3 into a mixed acid of concentrated sulfuric acid and phosphoric acid, and stirring for 1 hour to fully disperse the graphite; adding KMnO4 in three times, continuously stirring for 20 minutes, removing the ice bath, heating the reaction system to 50 DEG C, continuously stirring for 24 hours until the solution gradually becomes a brownish black viscous material, adding 30% H2O2 until the color of the solution becomes bright yellow from brownish black, washing the product with a 5% HCl solution for three times, and washing with deionized water until the product is neutral for later use. Graphene subjected to hydroxylation treatment is introduced in the preparation process of the electrolytic copper foil, and copper and functionalized graphene are synchronously deposited on the surface of a cathode by utilizing an electrochemical co-deposition technology, so that the copper foil for the lithium ion battery with high conductivity, high mechanical strength and good interface stability is obtained.

The invention provides a method and equipment for removing tritium in tritium-containing wastewater based on a GO and PGO heterojunction membrane. The method comprises the following steps: preparing graphene oxide GO by adopting a Hummers method; preparing porous graphene PG by adopting a template method; placing the porous graphene PG in potassium permanganate sulfate, oxidizing at 37 DEG C for 26 hours, and centrifugally washing to obtain oxidized porous graphene PGO; the preparation method comprises the following steps: mixing graphene oxide GO and oxidized porous graphene PGO according to a mass ratio of 1: 1, and adding deionized water to prepare a suspension; a negative pressure suction filtration method is adopted, a heterojunction separation membrane is formed on a polyethersulfone substrate, and the pore diameter of the polyethersulfone substrate is 0.22 micron; the method comprises the following steps: carrying out cross filtration on tritium-containing wastewater with tritium activity of 100000 shellfish per liter at 25 DEG C under the pressure of 2-6 bar; and calculating a single-stage tritium removal rate and calculating a hydrogen-tritium separation factor.

The application discloses a kind of hybrid antistatic EPDM composite foamed materials and preparation method thereof, belong to polymer composite foam material field. According to weight fraction, the hybrid antistatic EPDM composite foamed material includes EPDM particle 80-90 parts, EVA particle 10-20 parts, antistatic hybrid composite filler 7-12 parts, zinc oxide 2 parts, stearic acid 2 parts, foaming agent azobisformamide 7 parts, crosslinking agent dicumyl peroxide 0.5 parts, talc 2-4 parts.Among them, antistatic hybrid composite filler is first prepared with acidified carbon fiber, zirconium dioxide to prepare zirconium dioxide on acidified carbon fiber, then combined with the preparation of graphene oxide using improved Hummers method to obtain compound.The antistatic hybrid composite filler and EPDM are prepared by double roll mixing, mould pressing foaming method to obtain hybrid antistatic EPDM composite foamed material, formula scientific and reasonable, process flow is simple and practical;The compatibility of the prepared hybrid antistatic filler and matrix is good, dispersed uniformly and has excellent antistatic effect, simultaneously has excellent mechanical property.

The present invention relates to the technical field of hydrogen fuel cell anodes, and specifically to a method for preparing hydrogen fuel cell anodes using waste manganese-based sodium ion batteries. The preparation method comprises the following steps: discharging the waste manganese-based sodium ion batteries in a NaCl solution to obtain electroless manganese-based sodium ion batteries, crushing the batteries to obtain manganese-based sodium ion battery slag, blowing the slag to obtain a manganese-based sodium ion battery slag free of diaphragms and plastic coatings, and immersing the slag in an organic solvent; completely separating the negative electrode waste carbon from the current collector under ultrasound assistance to obtain a clarified solution; preparing graphene oxide from the negative electrode waste carbon using the Hummers method; adjusting the pH value of the clarified solution, filtering to obtain a sodium carbonate residue and a manganese ion-containing filtrate; mixing the graphene oxide with the filtrate, stirring, heating, and drying to obtain a manganese-doped graphene catalyst, which is then used as a hydrogen fuel cell anode. The present invention enables controlled and complete recovery of positive and negative electrode waste; uses inexpensive and easily controlled materials; and produces a manganese-doped graphene catalyst with excellent application effects.

Disclosed is a method for synthesizing a reduced graphene oxide (rGO)-coated silicon-lithium titanium oxide composite for improving lithium-ion battery efficiency, wherein in order to alleviate volume expansion of Si and improve electrochemical performance, Si particles are uniformly embedded in lithium titanium oxide (LTO) and rGO is applied on the LTO by spray drying to synthesize a rGO@SLTO composite. A method for synthesizing a rGO-coated silicon-lithium titanium oxide composite for improving lithium-ion battery efficiency according to the present invention comprises: a first step for uniformly mixing Si powder and lithium titanium oxide powder by ball milling; a second step for treating the mixture of the first step by chemical vapor deposition to prepare silicon lithium titanium oxide (SLTO); a third step for synthesizing graphite into graphene oxide (GO) by the Hummers method; and a fourth step for mixing the GO with the SLTO, and then producing a rGO@SLTO composite by spray drying and chemical vapor deposition.

The present disclosure relates to a copper-manganese composite adsorption material and graphite oxide and a preparation method and application thereof, the copper-manganese composite adsorption material prepared by the method comprises copper elements, manganese elements, sulfur elements, potassium elements and oxygen elements, and the method comprises the following steps: preparing graphite oxide by using an improved Hummer method, performing solid-liquid separation on the obtained material to obtain a filtration stock solution and the graphite oxide; and performing hydrothermal treatment on a mixture of a copper source and the filtration stock solution of the graphite oxide to obtain the copper-manganese composite adsorption material.The copper-manganese composite adsorption material prepared by the method exhibits excellent performance in a hydrogen purification reaction process, and can remove sulfides in hydrogen at a temperature lower than 50 DEG C, and the content of sulfides in the purified hydrogen can meet the standard requirements of fuel cell hydrogen on the content of sulfides.