288 results about "Ion adsorption" patented technology

The invention discloses a mine water fluorine removal agent and a preparation method and application thereof, and belongs to the technical field of wastewater treatment.The preparation method of the fluorine removal agent comprises the following steps that aluminum salt, calcium salt, magnesium salt and ferric salt are added into water to be stirred, then a chelating agent, a hydroxy carboxylic acid compound and a dispersing agent are added, the mixture is heated to 40-60 DEG C to be stirred and dispersed, and heat preservation is conducted. The preparation method gets rid of the constraint of traditional calcium salt, introduces the chelating agent, the hydroxy carboxylic acid compound and the dispersing agent on the basis of controlling the compatibility of the materials and the synthesis reaction process, and utilizes the excellent fluorine ion adsorption performance and flocculation settling performance of the aluminum-calcium-magnesium-iron-based quaternary metal material to improve the fluorine ion adsorption performance of the aluminum-calcium-magnesium-iron-based quaternary metal material. Quaternary metals are assembled into a long-chain porous structure through chelation, the specific surface area and the pore volume are further increased, the contact area with fluorine ions in mine water is increased, and the porous structure adsorbs complexing groups to achieve the purposes of rapid coordination, strong adsorption, precise chelation, flocculating settling and efficient removal of fluoride in mine water.

The invention provides an intelligent prediction method of an ion adsorption type rare earth ore metallogenic target region based on a deep neural network, and provides a novel convolutional neural network model RCACNet fusing cross-level cavity features and attention, and the model adopts a deep residual network as a backbone network. The densely connected cavity space pyramid pooling module, the cross-level feature fusion module and the convolution block attention module embedded in the backbone network are fused, and through cooperative work of the four modules, complex challenges such as similar spectrum, variable scale and fine features of the ion adsorption type rare earth ore target can be effectively handled; therefore, high-precision segmentation is realized.

The invention provides a sodium ion battery capacitor and a preparation method thereof. The sodium-ion battery capacitor comprises a positive pole piece, a negative pole piece, a diaphragm and an electrolyte, the positive pole piece comprises a composite positive pole material, and the composite positive pole material comprises a capacitive material and a layered oxide; the negative electrode plate comprises a composite negative electrode material, and the composite negative electrode material comprises hard carbon and a surface functional group modified porous carbon nanotube. The capacitive material and the layered oxide are synergistically matched to serve as the composite positive electrode material, a three-dimensional porous network structure is formed, and the synergistic effect of the double-electrode-layer capacity and the oxidation-reduction reaction can be improved; the hard carbon and the surface functional group modified porous carbon nanotube are synergistically matched to serve as the composite negative electrode material, so that the sodium ion diffusion path, the electrolyte infiltration area and the charge-discharge efficiency are favorably optimized, and the sodium ion adsorption capacity is improved. The sodium ion battery capacitor has the characteristics of high energy density, high power density, wide temperature range charging and discharging capability and the like.

The invention provides a chitosan composite material and a compound feed additive, and relates to the technical field of feed additives. The chitosan composite material comprises cross-linked chitosan and a porous carrier, the cross-linked chitosan is coated on the surface of the porous carrier; the porous carrier comprises a first porous carrier and a second porous carrier, the average particle size of the first porous carrier is 80-150 [mu] m, and the average particle size of the second porous carrier is 10-30 [mu] m. The chitosan composite material disclosed by the invention has relatively good heavy metal ion adsorption performance and can be used as a feed additive.

The invention relates to the technical field of saline-alkali soil improvement, and discloses a preparation method and application of a compound fertilizer. The method comprises the following steps: crushing and mixing gypsum stone with more than or equal to 85% of sulfate and fly ash with more than or equal to 25% of calcium oxide according to a ratio of 2: 1 to form an alkaline mixture with the total content of calcium and magnesium being more than or equal to 60%; the method comprises the following steps: chelating humic acid (a carboxylic acid group is greater than or equal to 40%) with a citric acid solution according to a ratio of 3: 2 to prepare an organic acid buffer solution with the pH value of 8.0-9.5; and mixing the alkaline mixture, a buffer solution and a nitrogen-phosphorus-potassium compound fertilizer (18-12-10) according to a ratio of (60-76%): (8-15%): (16-25%), adding a silica sol dispersing agent, sterilizing, fermenting, granulating and forming. The compressive strength of the obtained fertilizer particles is larger than or equal to 15 N, and when the fertilizer particles are applied in cooperation with acid irrigation water, the soil sodium ion adsorption rate can be increased by 30%-50%, the pH value is reduced by 0.5-1.5 units, and the crop yield is increased by 15%-25 The saline-alkali soil conditioner has the functions of reducing salt, regulating acid and promoting growth, and is suitable for improvement of moderate and severe saline-alkali soil.

Specifically, firstly, montmorillonite (MMT) powder is stripped into a nanosheet layer by using an ultrasonic dispersion technology, a two-dimensional layered structure of the nanosheet layer forms rich nanoscale ion channels, and an efficient path is provided for ion directional migration in salinity gradient power generation; meanwhile, after the cellulose is stripped and dispersed by a DMSO solution, a uniform polymer network is formed, the uniform polymer network is used as a substrate material to improve the mechanical strength of the film, and the interfacial ion adsorption and conduction capability is optimized through hydrophilic groups. When the MMT nanosheet and the cellulose suspension are mixed, the MMT nanosheet and the cellulose suspension form an interpenetrating network structure through physical winding and electrostatic interaction, ordered stacking is achieved through vacuum filtration, and finally the composite film with both ion selectivity and structural stability is formed on the substrate. The preparation process is high in material adaptability, green and controllable in preparation process, high in competitiveness in large-scale production and practical application and beneficial to popularization.

The invention discloses a prospecting exploration method for ion adsorption type heavy rare earth ore in middle and low mountainous areas, and belongs to the technical field of geological mineral exploration. According to Y, Dy and Nb abnormity and Y-Nb combination abnormity areas such as water chemical exploration and soil chemical exploration of a working area, high-silicon, potassium-rich, alkali-rich and sphene-rich heavy rare earth secondary mineral mineralization mother rocks are preferably selected, and a favorable mineralization area of the ion adsorption type heavy rare earth ore is delineated by combining characteristic parameters that Y / Ce is greater than 0.9 and Dy / Ce is greater than 0.2; screening south and east-south-east abrupt slope (gradient of about 30 degrees) areas by utilizing a GIS spatial analysis technology, overlapping favorable mineralization areas of the ion adsorption type heavy rare earth ore, and comparing and determining an ion adsorption type heavy rare earth ore prospecting target area in a working area; whether mineralization abnormity exists in the heavy rare earth ore prospecting target area or not is verified by using a manual impact sampling drill and a rare earth ion leaching-titration qualitative analysis method; chemical samples are preliminarily collected, 15 components of ion phases are analyzed, whether heavy rare earth ore bodies exist or not is judged and evaluated, the prospecting exploration range of the ion adsorption type heavy rare earth ore is determined, and the prospecting efficiency of the ion adsorption type heavy rare earth ore is improved. According to the method, the mineralization prospective area of the ion adsorption type heavy rare earth ore can be rapidly delineated in a large range, the prospecting target area is narrowed, and the prospecting efficiency of the ion adsorption type heavy rare earth ore is improved.

The invention discloses a method for researching the corrosion resistance behavior of zinc alloy based on a first principle. The method comprises the following steps: firstly, retrieving a zinc primitive cell model from a material database and carrying out structure optimization; performing crystal face cutting, cell expansion and re-structure optimization to obtain a zinc plate model; then aluminum atom random replacement doping processing is carried out, and optimization is carried out to obtain a doping model; performing static self-consistent calculation to obtain surface energy, and screening out the most stable doping model; fixing two layers of atoms at the bottom of the most stable doping model, performing chloride ion adsorption calculation and structure optimization, and calculating adsorption energy to determine a most stable adsorption site; and finally, carrying out electronic structure calculation of state density and a work function, and representing the corrosion resistance of the zinc alloy. According to the method, a zinc alloy corrosion micromechanism is deeply analyzed, theoretical guidance is provided for component optimization and corrosion resistance improvement, and compared with a traditional experimental method, the research and development cost and time are remarkably reduced, the research efficiency is improved, and the method has important theoretical and practical application value.

The invention provides application of sodium citrate as a retardant in ion adsorption type rare earth ore seepage leaching, and relates to the technical field of nonferrous metal mining. The application provided by the invention comprises the following steps: in the in-situ ore leaching process of the ion adsorption type rare earth ore, injecting a sodium citrate solution as a retardant in the downward direction of a diversion hole excavated in the rare earth ore and in other areas needing closure and speed control in advance, so as to reduce the seepage rate of the ore leaching agent in the areas and realize regulation and control of the seepage direction. According to the invention, the leaching liquid can be prevented from seeping downwards through the flow guide holes so as to improve the liquid yield, the seepage extraction of a mineral leaching agent on wider areas such as a semi-weathered layer is enhanced, the mineral leaching blind area is effectively reduced, and the leaching efficiency is improved.

The invention discloses an electroplating sludge iron resource recovery method based on acid leaching-resin selective adsorption, and relates to the field of dangerous solid waste resource treatment.The electroplating sludge iron resource recovery method comprises the following steps that S1, collected electroplating sludge and sodium salt are evenly mixed, roasted, cooled, washed and filtered, and washing liquid and filter residues are obtained; s2, adding water into the filter residues obtained in the S1, uniformly mixing, then mixing with an acid solution, carrying out an acid leaching reaction, and carrying out solid-liquid separation to obtain an acid leaching solution; according to the electroplating sludge iron resource recycling method based on acid leaching-resin selective adsorption, selected specific chelating resin is large in iron ion adsorption capacity and excellent in selectivity under the low pH, competitive interference of coexisting ions such as Cu < 2 + > can be effectively overcome, and the iron recycling rate can reach 99% or above; the adsorption step is carried out under the strong acidic condition and is matched with the characteristics of the electroplating sludge pickle liquor, the pH does not need to be greatly adjusted, the process is simplified, and the cost is reduced.

The invention discloses a modified hard carbon material, a preparation method thereof and a battery, and relates to the technical field of battery negative electrode materials. The preparation method comprises the following steps: forming a hard carbon layer by taking grafted silicon dioxide as a template, coating the hard carbon layer with a soft carbon layer, coating the soft carbon layer with silicon dioxide, performing confinement carbonization, and removing the template. Wherein the grafted silicon dioxide contains hetero atoms S, and the hard carbon layer contains hetero atoms P. During preparation, a silicon dioxide template grafted with 3-mercaptopropyltriethoxysilane is prepared by a reverse micelle method, a phenolic resin precursor is coated to form the hard carbon layer, P is introduced through modification of triglycidyl phosphate, then an asphalt-based soft carbon layer is coated, and carbonization is performed to obtain the modified phenolic resin. And removing silicon dioxide to obtain the target material. According to the material, active sites and interlayer spacing are increased through precise doping of S and P, volume expansion is relieved through cooperation of soft carbon and hard carbon, ion adsorption is enhanced through oxygen groups, and the material shows high capacity and excellent cycle stability in secondary batteries such as potassium ions and the like and is suitable for the field of novel energy storage batteries.

The present application relates to a kind of sea sand chloride solidifying agent and its application method, the solidifying agent includes solidifying agent A and solidifying agent B;The solidifying agent A is proportioned according to the raw material of weight parts as follows: modified hydrotalcite 2~5 parts, ultrafine silica powder 0.05~0.2 parts, water 30~120 parts;The solidifying agent B is proportioned according to the raw material of weight parts as follows: metakaolin 1~4 parts, calcium hydroxide 0.1~0.3 parts, water 45~180 parts.The present application is attached to the surface of sea sand by modified hydrotalcite with ion adsorption effect and forms inner solid layer, can effectively absorb the chloride ion released by sea sand;While using calcium hydroxide to excite metakaolin with sheet shape and form stable outer solid layer, can effectively prevent the shedding of inner solid layer material;The generated hydrated calcium silicate and hydrated calcium aluminate gel can also absorb the chloride ion solidified from the escape of inner solid layer, further improve the chloride ion solidification effect.

The application relates to a plasma adsorption dual-action industrial wastewater degradation equipment and a method thereof, and belongs to the technical field of environmental protection. Adsorption and desorption can be synchronously carried out, production efficiency is improved, power consumption and electrode loss are greatly reduced, and treatment of high-concentration and large-flow sewage is realized. The treatment depth of the application is excellent, the oxidation potential of plasma discharge can easily reach more than 20 electron volts, the oxidation potential of fluorine, which is the highest in chemical substances, is only 3.2 electron volts, and the higher oxidation potential means better treatment effect. Normal temperature and pressure operation, low operation cost. The application is suitable for most water quality (no requirements for the PH value, salinity and ammonia nitrogen of water), and the technology has excellent universality. Traditional adsorption technology inevitably produces a large amount of solid waste, and the treatment difficulty and treatment cost are high, which has become a pain point in the industry. The application avoids the generation of solid waste while improving the degradation efficiency of organic matters and reducing energy consumption.

The invention discloses a lithium manganate conductive material and a preparation method thereof, and the lithium manganate conductive material comprises a lithium manganate inner net layer which is a nano network layer formed by connecting lithium manganate crystal grains; the graphene and / or carbon nanotube conductive carbon outer net layer is deposited on the surface of the inner net layer. The lithium manganate crystal grains are uniform and fine, and the crystal grains are of a continuous net-shaped arrangement structure. Dissolving and mixing the polymer nanofiber, manganese salt, lithium salt and M-doped salt to form gel, drying, and carrying out two-stage programmed heating calcination in an oxygen-containing atmosphere to obtain a lithium manganate nano inner net layer; ultrasonically dispersing the lithium manganate nano inner net layer in water, adding acidified carbon nanotubes and / or graphene oxide dispersion liquid, and depositing the acidified carbon nanotubes and / or graphene oxide dispersion liquid on the surface of the inner net layer to form a conductive carbon outer net layer. The obtained lithium manganate conductive material has a continuous large-area two-dimensional network structure, shows high conductivity, high specific capacity and excellent cycling stability, and can be widely applied to the fields of lithium ion batteries, electrochemical lithium extraction, lithium ion adsorption and the like.

The invention provides a steam explosion cotton stalk fiber ecological restoration material and a preparation method thereof, and belongs to the technical field of modified materials. Comprising the following raw materials in parts by weight: 5-10 parts of modified tailings; 47-60 parts of modified steam blasting cotton stalk fibers; the modified tailings are a material which is modified by polydopamine and a silane coupling agent and then is coated with an acrylic copolymer; the modified steam explosion cotton stalk fiber is a material prepared by mixing cotton stalk powder subjected to steam explosion with a fermented enzymolysis compound, polymerizing and modifying tannic acid, coupling humic acid, rosmarinic acid and amino cyclodextrin, and then reacting with trimellitic anhydride. According to the prepared steam explosion cotton stalk fiber ecological restoration material, a colloidal hard shell is formed on the surface layer after spray seeding, a protection blanket is formed and tightly attached to a restoration face, the wind-water erosion resistance of the material is improved, the materials can be converted into nutrients needed by plant growth, the good heavy metal ion adsorption and fixation capacity is achieved, the soil quality is effectively improved, and the ecological restoration effect is good. And the method has very important significance.

The invention discloses an interfacial film, a preparation method thereof and an application of the interfacial film in assembly of a lithium ion battery, the interfacial film comprises the following components: lithium salt, polyvinylidene fluoride and 1-butyl-2, 3-dimethyl imidazole onium chloride, the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is about 1: 0.9-1.1: 0.9-1.1, preferably about 1: 0.95-1.05: 0.95-1.05, and the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is 1: (0.9-1.1): (0.9-1.1), preferably about 1: (0.95-1.05). The weight-average molecular mass of the polyvinylidene fluoride is about 90-110 thousand g / mol, the lithium salt is lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) and / or lithium bis (fluorosulfonyl) imide (LiFSI), the purity of the lithium salt is greater than 99.9%, the polyvinylidene fluoride (PVDF) is selected as a polymer matrix, and is compounded with the ionic liquid 1-butyl-2, 3-dimethyl imidazolium chloride (BMMImCl) and the lithium salt, so that the performance of the lithium ion battery is improved. According to the present invention, the novel interfacial film is prepared, and the interfacial film has characteristics of high temperature resistance, chemical stability, excellent ion transmission characteristic, excellent lithium ion adsorption capacity, excellent performance, and wide application prospect in the lithium battery field.

The invention provides preparation and application of a dechlorinated freund's salt precipitate, and relates to the technical field of sewage treatment. The dechlorinated freund's salt precipitate is prepared by adding CaO and NaAlO2 into a NaCl solution, stirring, mixing and reacting at room temperature, filtering, and drying the precipitate. According to the method, the defects in the prior art are overcome, the prepared dechlorination freund's salt precipitate can achieve a good heavy metal ion adsorption effect with a small dosage under the weak alkaline condition, and the purification effect on coking circulating water is comprehensively improved.

The utility model discloses integrated industrial circulating water ion removal equipment which comprises a shell, a first water inlet and a first water outlet are formed in the position, close to the bottom, of the end face of one side in the length extension direction of the shell, the first water inlet is connected with a water inlet pipe, and the water inlet pipe extends upwards in the shell and is connected with one end of a sterilization and algae removal groove; a second water outlet is formed in the other end of the sterilization and algae removal tank and connected with a water outlet pipe, a third water outlet of the water outlet pipe is formed in the position, close to the bottom, of one side of the adsorption cavity in the length direction, and a plurality of adsorption devices which are evenly distributed and can adsorb calcium and magnesium ions in water are arranged in the length direction of the adsorption cavity. An overflow port of an overflow pipe is formed in the other side of the adsorption cavity; the overflow pipe is connected with the first water outlet. By adopting the design scheme and the highly integrated design, the sterilization, algae removal and calcium and magnesium ion adsorption of the industrial hard water are simultaneously realized through one device, so that the industrial hard water is converted into soft water, and the soft water can be recycled.

The invention relates to the technical field of regional rare earth prediction, in particular to a landscape pattern and spatial statistics coupled ion adsorption type rare earth enrichment region prediction method, and the method comprises the steps: obtaining an ion adsorption type rare earth ore control index parameter set, rare earth abundance data and rare earth content actual measurement data of a target region; constructing an effect coefficient set according to the geological-hydrological index parameter set and the rare earth content measured data; constructing a landscape resistance field according to the landscape index parameter set to obtain the landscape resistance field; obtaining a spatial weight matrix; performing spatial autocorrelation analysis according to the rare earth abundance data and the spatial weight matrix to obtain spatial autocorrelation analysis indexes; performing rare earth enrichment probability index prediction according to the geological-hydrological index parameter set, the effect coefficient set, the landscape resistance field and the spatial autocorrelation analysis index to obtain rare earth enrichment probability index data; and performing rare earth enrichment area prediction on the target area according to the rare earth enrichment probability index data to obtain a rare earth enrichment area prediction result of the target area.

The invention relates to the technical field of rare earth resource exploration, in particular to an ion adsorption type rare earth content determination method, system, equipment and medium, and the method comprises the following steps: constructing a quantitative relation prediction model between normalized charge rate and total rare earth oxide mass fraction, arranging an impedance measurement system in a research area, and collecting impedance amplitude and phase; and obtaining a normalized charge rate based on the impedance amplitude and the phase, constructing a quantitative relation prediction model between the normalized charge rate and the total rare earth oxide mass fraction, and calculating to obtain the total rare earth oxide mass fraction based on the quantitative relation prediction model. According to the method, the surface electrical influence of the ion adsorption type rare earth ore sample is considered, the correlation between the spectrum induced polarization response and the chemical parameters is established, and the content of the rare earth oxide in the ion adsorption type rare earth sample is estimated by using the correlation.

The application discloses a modified hard carbon material and a preparation method and a battery thereof, and relates to the technical field of battery negative materials. The hard carbon layer is formed by using grafted silica as a template, then the soft carbon layer is coated outside the hard carbon layer, and then the silica is coated outside the soft carbon layer to limit carbonization and remove the template to obtain the target material; wherein the grafted silica contains a heteroatom S, and the hard carbon layer contains a heteroatom P; in the preparation, the silica template grafted with 3-mercaptopropyl triethoxysilane is prepared by a reverse micelle method, the phenol formaldehyde resin precursor is coated to form the hard carbon layer, P is introduced by modification of the trisglycidyl phosphate, and then the pitch-based soft carbon layer is carbonized, and then the silica is removed to obtain the target material. The material increases the active sites and the interlayer spacing by accurate doping of S and P, cooperatively relieves the volume expansion by the hard and soft carbons, and strengthens the ion adsorption by the oxygen groups, and exhibits high capacity and excellent cycle stability in the secondary batteries such as potassium ion batteries, and is suitable for the field of new energy storage batteries.

The application provides a preparation method of a hydrogel adsorption material, comprising the following steps: preparing layered double hydroxides (LDHs); loading zero-dimensional carbon nanomaterial into nanocellulose to obtain solution A; dissolving chitosan in acetic acid to obtain solution B; uniformly mixing solution A, solution B and the LDHs dispersed in ethanol to obtain a pre-polymerization solution; adding a crosslinking agent into the pre-polymerization solution, and heating to fully gelate, and then washing to obtain the hydrogel adsorption material. The preparation method of the hydrogel adsorption material can effectively capture and fix iodine ions, and the prepared hydrogel adsorption material has good cycle stability. The application also provides an application of the hydrogel adsorption material in iodine ion adsorption.

The invention belongs to the technical field of salt lake resource development and rare metal recovery, and discloses a fibrous rubidium adsorbent as well as a preparation method and application thereof, a metal-based Prussian blue analogue spinning solution is synthesized in a non-aqueous system through a one-pot method, and the fibrous rubidium adsorbent is directly prepared through wet spinning. The preparation of the powder adsorbent and the molding of the composite material are integrated, so that the process is simplified, and the problem of powder agglomeration is avoided. The prepared fibrous rubidium adsorbent has the rubidium ion adsorption capacity of 248.73 mg / L, achieves adsorption equilibrium within 7 min, is suitable for industrially recovering rubidium from high-salinity salt lake brine, and has remarkable economic and environmental benefits.

The invention relates to the technical field of supercapacitor preparation, in particular to a (NiCo) Se2 / CoFe2Se4 composite electrode, a preparation method and application, and the method comprises the steps: preparing a NiCo precursor solution through Ni salt, Co salt and urea, growing NiCo precursor nanorods on a titanium mesh, and constructing a three-dimensional conductive skeleton; then preparing a Co-FePBA suspension by using Co salt, sodium citrate and K3 [Fe (CN) 6]; the titanium mesh loaded with the NiCo precursor nanorod is soaked in Co-FePBA suspension and aged at the constant temperature, a double-active-component precursor is formed, effective interface chemical bonding is formed, and the charge transfer efficiency can be effectively improved; finally, a (NiCo) Se2 / CoFe2Se4 heterojunction is generated through gas-phase selenylation, charges are redistributed at a heterogeneous interface, a built-in electric field is formed, and electron transfer and ion adsorption are accelerated; according to the method, the reaction kinetics of collaborative optimization of the (NiCo) Se2 and the CoFe2Se4 is realized, the process is simple, convenient, environment-friendly and economical, a feasible scheme is provided for large-scale production, and the problems of compounding of the (NiCo) Se2 and the CoFe2Se4, high charge transfer resistance and poor charge and discharge efficiency in the prior art are solved.

The invention relates to an ether bond type covalent organic polymer (TPTF-AO) containing an amidoxime group and a synthesis method thereof. The method comprises the following steps: by taking 2, 4, 6-tri (4-hydroxyphenyl)-1, 3, 5-triazine and tetrafluoroterephthalonitrile as raw materials, constructing a covalent organic polymer precursor (TPTF) connected by a stable ether bond through nucleophilic substitution reaction of hydroxyl and fluorine atoms; further, the cyano group in the TPTF is subjected to amidoximation reaction under a mild condition and is efficiently converted into an amidoxime group, and the target product TPTF-AO is obtained. The polymer has a rigid skeleton connected by ether bonds and a mesoporous-macroporous composite pore channel structure, and has excellent chemical stability, thermal stability, rapid mass transfer capability and high-density metal ion coordination sites. The bottleneck that a traditional imine bond material is insufficient in stability is broken through, the problem that functional modification and skeleton stability are difficult to be compatible is solved, and the obtained material has wide application prospects in the fields of uranyl ion adsorption, catalysis, energy storage and the like.

The present application relates to a kind of solar photocatalytic self-cleaning aluminum salt lithium ion sieve filler and its preparation method, the active component of the filler is xLiCl·2Al (OH) 3·nH2O·yBiOCl, wherein, x=0.05-1, y=0.01-0.1, n=2, 3, 4;Active component accounts for 25%-75% of the mass fraction of filler;Filler lithium ion adsorption capacity is 3-9mg / g under solar irradiation and 20-30 ℃, lithium ion recovery rate is 85%-95%, after 10 cycles of adsorption and desorption, lithium ion adsorption capacity decreases by 8%-12%;After activation and regeneration, lithium ion adsorption capacity recovers to the level before pollution.The solar photocatalytic self-cleaning aluminum salt lithium ion sieve filler of the present application has photocatalytic self-cleaning function, selective adsorption of lithium and organic pollutant degradation is carried out simultaneously, which prevents the accumulation of organic pollutants, thereby improving its organic pollution resistance.

The invention discloses a preparation method of a metal-containing closed-pore-rich hard carbon nanofiber material and application of the metal-containing closed-pore-rich hard carbon nanofiber material as a sodium-ion battery negative electrode material. The interior of the metal-containing hard carbon nanofiber material rich in closed pores contains metal, and the outer layer of the metal-containing hard carbon nanofiber material rich in closed pores is a carbon coating layer; the number of closed pores in the metal-containing hard carbon nanofiber material rich in closed pores is greater than the sum of the number of micropores and mesopores. The prepared metal-containing hard carbon nanofiber material rich in closed pores has sufficient sodium storage space, good sodium ion adsorption capacity and good electrolyte barrier property. The sodium storage capacity of the hard carbon negative electrode can be greatly improved, side reactions in the cycle process are inhibited, the cycle stability of the sodium-ion battery negative electrode is improved, and the performance is excellent. Meanwhile, the overall energy density of the battery can be further improved through the self-supporting integrated electrode structure design, and good application prospects are achieved.

This invention provides a battery separator with ion adsorption capabilities and its preparation method, belonging to the field of new energy battery technology. It solves the problem of battery capacity decay and deterioration of cycle performance caused by ion leaching damaging the SEI film and consuming active lithium. The battery separator of this invention includes a base film and a ceramic coating on at least one surface of the base film. The raw materials for preparing the ceramic coating include porous organic framework materials, metal ion chelating agents, ceramic particulate materials, wetting agents, and binders. This invention significantly improves the dispersion ability of the slurry and shortens the dispersion time by using metal ion chelating agents instead of traditional dispersants. Simultaneously, the use of binders containing specific functional groups crosslinks with the porous organic framework materials and forms a synergistic effect with the chelating agents, thereby jointly enhancing the battery separator's ability to adsorb metal ions. This effectively solves the problem of poor stability in high-energy-density battery systems, thus significantly improving the battery's energy density and cycle life.

The invention discloses a hierarchical collaborative constraint graph neural network algorithm for ion type rare earth grade prediction, and aims at the characteristics of complex three-dimensional grade space distribution, sparse drilling data and scarce covariables of ion adsorption type rare earth ore. The invention provides a two-stage improved graph convolutional neural network method for three-dimensional grade distribution prediction of ion adsorption type rare earth ores, which comprises the following steps: on the basis of sparse borehole data, performing graph construction on boreholes and units to be predicted to generate an undirected graph structure; and then introducing a constraint message passing graph encoder, an unsupervised MLP graph clustering module and a joint hierarchical supervision classification module, and constructing a three-dimensional grade prediction model suitable for irregular topology and strong spatial heterogeneity. According to the method, the grade high-value area and the grade low-value area in the three-dimensional space can be more accurately delimited, and a reliable three-dimensional decision basis is provided for in-situ ore leaching liquid injection engineering design and drill hole layout optimization.