246 results about "Water methanol" patented technology

The invention provides a methanol production system comprising a reverse water gas reaction module having a first in-situ separation reactor configured to perform reverse water gas conversion of carbon dioxide and hydrogen, generate and in-situ separate carbon monoxide and water, a methanol synthesis module connected to the reverse water gas reaction module, and the second in-situ separation module is provided with a second in-situ separation reactor, and the second in-situ separation reactor is configured to generate and separate methanol in situ by utilizing the carbon monoxide generated by the reverse water gas reaction module to react with hydrogen. According to the scheme provided by the invention, a two-step methanol preparation process and the in-situ separation type reactor are organically coupled, so that the conversion of carbon dioxide can be completed under a relatively mild working condition; the problems of low one-way conversion rate, high recycling compression work and the like in methanol preparation through carbon dioxide hydrogenation are solved; the energy consumption for separating water and methanol is saved; the methanol production cost is further reduced, and the reliability and economy of the system are improved.

The invention belongs to the technical field of pharmaceutical analysis, and particularly relates to a method for determining a residual solvent in LXH-2103 by headspace gas chromatography. The determination method comprises the following steps: preparing a blank solution, a reference substance solution and a sample solution, respectively injecting the blank solution, the reference substance solution and the sample solution into a headspace for balancing, injecting the solutions into a gas chromatograph in a headspace sample injection manner, recording a chromatogram, and calculating the content according to a peak area by an external standard method; the residual solvent is absolute methanol, absolute ethyl alcohol, isopropanol, dichloromethane and methylbenzene. The method for determining the residual solvents in the LXH-2103 by using the headspace gas chromatography, provided by the invention, is high in sensitivity, good in repeatability and high in accuracy, and can be used for simultaneously detecting various residual solvents in the LXH-2103, so that the quality of the LXH-2103 is ensured, and the safety of clinical medication is improved.

The invention discloses gallium ion-quercetin coordination nanoparticles (GQNPs) as well as a preparation method and application thereof, specifically, quercetin, gallium nitrate hydrate and polyvinylpyrrolidone are respectively dissolved in an absolute methanol solution to prepare a quercetin solution, a gallium nitrate hydrate solution and a polyvinylpyrrolidone solution; secondly, fully mixing the quercetin solution and the polyvinylpyrrolidone solution, dropwise adding the gallium nitrate hydrate solution, and rapidly changing the color of the mixed solution from faint yellow to orange yellow in the dropwise adding process; and finally, dialyzing the orange-yellow mixed solution to remove excessive gallium ions and polyvinylpyrrolidone, thereby finally obtaining the GQNPs. The prepared GQNPs and deferiprone show excellent treatment effects on cell and living body levels, are expected to be applied to treatment of Parkinson's disease through multi-dimensional anti-ferroptosis, do not show obvious toxic and side effects in the embodiment, and are expected to be applied to further preclinical research.

A method for catalyzing selective oxidation of 5-hydroxymethylfurfural by ion-doped birnessite belongs to the field of chemical engineering, and comprises the following steps: adding an ion-doped birnessite type catalyst into a solvent, and catalyzing 5-hydroxymethylfurfural to prepare 2, 5-furandicarboxaldehyde and 2, 5-furandicarboxylic acid in the atmosphere of air or oxygen at the temperature of 25-240 DEG C, wherein the solvent is water, methanol, ethanol, acetonitrile, dichloromethane, N, N-dimethylformamide, N, N-dimethylacetamide and the like. The method is simple, few in by-products and environmentally friendly. By adopting ion-doped birnessite as the catalyst, the method has the advantages of economy, environmental protection, mild conditions, high selectivity, easiness in recovery of the catalyst and the like; the ion-doped birnessite catalyst can efficiently and highly selectively catalyze oxidation of 5-hydroxymethylfurfural to prepare 2, 5-furandicarboxaldehyde, catalytic materials are easy to separate, the production cost is low, and the ion-doped birnessite catalyst has remarkable technical and economic effects and application prospects.

The present invention proposes a method for removing odor impurities from 1,2-hexanediol, and belongs to the field of purification technology. The method for removing odor impurities from 1,2-hexanediol comprises the following steps: 1) mixing 1,2-hexanediol and an entrainer to obtain a mixed material; the entrainer is one or more of pure water, methanol, ethanol, n-propanol, isopropanol and n-butanol; 2) transferring the obtained mixed material to an azeotropic distillation tower for azeotropic distillation, extracting an azeotrope of the entrainer and odor impurities at the top of the tower, and obtaining the deodorized 1,2-hexanediol in the tower bottom. The method provided by the present invention does not involve chemical reactions, and has a short production process, generates less solid waste, and has a high purity of the purified 1,2-hexanediol product.

The present application relates to a kind of powder coating hydroxyalkylamide matting curing agent and its preparation method, the matting curing agent using including citric acid, 2-methyl-1,3-propanediol, dimethylbenzene, anhydrous methanol, N-methyl monoethanolamine, catalyst, nanometer titanium dioxide is reacted to obtain raw materials.In first, citric acid and 2-methyl-1,3-propanediol are grafted to carry out reaction, then the remaining four carboxyl groups of grafting are methyl esterification reaction, obtain methyl esterification product, then with N-methyl monoethanolamine acylation reaction obtains hydroxyalkylamide curing agent;Add nanometer titanium dioxide, fully mix and process to obtain the matting curing agent.The curing agent product functionality is higher, the hardness of coating film after curing is higher, and the boiling water resistance is excellent;And the coating film after curing has obvious matting effect, coating film gloss is basically reached 50-70%, and the decorative property is excellent.

The invention discloses a cellulose / graphene oxide / ZIF-67 derived nano-composite wave-absorbing material with a hierarchical porous structure and a preparation method, and relates to the technical field of preparation of wave-absorbing materials. The preparation method comprises the following steps: respectively dissolving dimethylimidazole and cobalt nitrate hexahydrate in absolute methanol, and mixing the dimethylimidazole and the cobalt nitrate hexahydrate to obtain ZIF-67 powder; the preparation method comprises the following steps: adding graphene oxide into deionized water for ultrasonic dispersion, then adding cellulose powder and ZIF-67 powder, and mixing to obtain a cellulose / graphene oxide / ZIF-67 composite material; and performing high-temperature pyrolysis treatment on the cellulose / graphene oxide / ZIF-67 composite material to obtain the cellulose / graphene oxide / ZIF-67 derived nano composite wave-absorbing material with the hierarchical porous structure. The wave-absorbing material prepared by the invention has the characteristics of thin thickness, light weight, strong absorption and wide frequency band, and effectively solves the problems of serious electromagnetic pollution, insufficient frequency band coverage of the traditional wave-absorbing material and structural design limitation.

The application relates to the technical field of film materials, in particular to a mixed matrix membrane and a preparation method and application thereof. Toluene is added into a viscous polyamine acid solution, the temperature is increased to 200-250 DEG C, and stirring reaction is carried out for 5-8 hours, then the precipitate is obtained through centrifugation, the precipitate is washed with methanol for 3-5 times, and the product COOH-PI is obtained through drying; zinc nitrate hexahydrate and 2-methyl imidazole are dissolved in methanol, stirring reaction is carried out at room temperature for 3-8 hours, then the product is taken out and centrifuged, the product is washed with anhydrous methanol for 3-5 times, and ZIF-8 is obtained through drying; NH2-ZIF-8 is synthesized by using the same method; COOH-PI is added into DMF and stirred to obtain a PI solution, ZIF-8 and NH2-ZIF-8 are respectively added into DMF, and MOF suspension is obtained through ultrasonic treatment for 2-5 hours, then the MOF suspension is added into the PI solution, stirring is carried out at room temperature for 24-36 hours, the casting solution obtained is poured into a flat and clean glass plate, heating is carried out at 60-65 DEG C for 24-48 hours, then the formed membrane is dried to obtain the mixed matrix membrane. The preparation condition of the mixed matrix membrane is mild, the stability of the membrane is obviously improved, and the mixed matrix membrane has high selective permeability to helium.

The application discloses a method for synthesizing a single-atom catalyst, which comprises the following steps of mixing raw materials: taking dimethyl imidazole, zinc nitrate and graphene oxide as solutes, and taking anhydrous methanol as a solvent to form ZIF-8@GO through stirring; taking ZIF-8@GO and thiourea as solutes, and taking anhydrous methanol as a solvent to form S / ZIF-8@GO through stirring and adsorption; first-stage pyrolysis: pyrolyzing S / ZIF-8@GO in a protective gas atmosphere to form porous carbon (S, N-C); precursor preparation: after the porous carbon is cooled, phenanthroline (Phen) and a transition metal source (M) are added into the porous carbon to form a precursor M / S, N-C@Phen; and second-stage pyrolysis: pyrolyzing the M / S, N-C@Phen precursor in a protective gas atmosphere to obtain a M / S, N-C single-atom catalyst. The synthesis method is simple and effective, can be used for large-scale synthesis of a single-atom catalyst, is suitable for synthesis of various metal single-atom catalysts, and solves the problems of complexity in the prior art and difficulty in large-scale preparation.

The invention discloses a chloroethylene carbonate purification process in the technical field of synthesis of lithium battery additives. The process adopts a novel hierarchical pore asymmetric zirconium organic phosphonate frame material as an adsorbent. The method comprises the following steps: firstly, mixing, heating and stirring crude chloroethylene carbonate and absolute methanol, and standing at room temperature for pretreatment; performing selective adsorption on the pretreatment solution through an adsorption column filled with the adsorption material; carrying out toluene washing, citric acid ethanol solution treatment and supercritical carbon dioxide extraction on the saturated material to realize regeneration; and finally, rectifying the solution subjected to adsorption treatment under a reduced pressure condition to obtain a high-purity product. The adsorption material is prepared through multiple steps of reactions including synthesis and modification of an organic ligand, framework construction of a zirconium source and a phosphonic acid ligand, asymmetric functional modification of the surface of the material, and final thermal activation and hydrophobic stabilization treatment. The process is simple and efficient, the material can be reused, and the method is especially suitable for the field of lithium battery additive synthesis.

This invention relates to the field of functional materials technology, and discloses a ruthenium-based catalyst for the acidic oxygen evolution reaction (OER), its preparation method, and its application. The preparation method includes dissolving 100-200 parts by mass of RuCl3·H2O and 1-40 parts by mass of VCl3 in 20-60 parts by volume of anhydrous methanol, stirring to obtain a mixed solution; slowly adding hydrazine hydrate dropwise to the mixed solution, continuing stirring, centrifuging and filtering; washing alternately with anhydrous methanol and ultrapure water, freeze-drying, and heat-treating at 300-500℃ for 1-4 hours to obtain a V-doped RuO2 catalyst. The prepared V-RuO2 catalyst exhibits excellent initial activity and long-term durability under acidic conditions, providing a new solution for developing high-performance anode catalysts suitable for proton exchange membrane water electrolyzers.

The invention discloses a kind of ferrocenyl-doped MOF-derived metal carbide electrocatalyst and its preparation method and application, preparation method includes:ZIF 8 is dissolved in anhydrous methanol to obtain solution A;Ferrocenyl monocarboxylic acid is dissolved in DMF to obtain solution B;Solution A and solution B are mixed uniformly to obtain reaction solution, and reaction solution is subjected to hydrothermal reaction;The product obtained after the reaction is centrifuged, washed, dried, calcined and carbonized to obtain the ferrocenyl-doped MOF-derived metal carbide electrocatalyst.The catalyst of the present invention has the advantages of being porous, having many active sites, further improves the catalytic performance of electrocatalyst, can be applied to disposable zinc-air battery as oxygen reduction catalyst, and has excellent electrochemical performance under alkaline conditions (0.1M KOH).

The application relates to a preparation method of a composite semiconductor photocatalyst and application thereof, and comprises the following steps: preparing g-C3N4 nanosheets; dispersing the prepared g-C3N4 nanosheets into methanol at a mass fraction of 10% to 70%, then adding 750 mg of trimesic acid and 150 mg of bismuth nitrate, and ultrasonic treating for 10 min to obtain a mixed suspension; transferring the mixed suspension into a microwave reaction kettle for reaction, the reaction temperature is 90 to 130 DEG C, the reaction time is 30 to 60 min, and centrifugal drying is carried out after the reaction is completed; then g-C3N4 / Bi-MOF is obtained through anhydrous methanol washing and freeze drying; a heterostructure is constructed, the energy band structure is changed, the charge transmission resistance is reduced, the photocatalytic activity is improved, the photocatalyst has two different structure and property photocatalytic activity centers, and the photocatalytic activity is changed from the energy band structure and the catalytic activity.

This invention relates to the field of mineral processing technology, specifically to an environmentally friendly copper-molybdenum separation inhibitor, its preparation method, and its application. The method includes: mixing starch and formamide, stirring at room temperature, cooling in an ice-water bath at -5°C, slowly adding chlorosulfonic acid at this temperature to initiate a sulfonation reaction, neutralizing to pH 7-8 with sodium hydroxide solution after the reaction, adding anhydrous methanol to precipitate the product, and washing and drying to obtain the sulfonated anionic starch polymer DGSS. The inhibitor is applied to the flotation separation of copper-molybdenum mixed concentrates, combined with a closed-circuit process of one roughing, one scavenging, and four cleaning stages, employing a gradient reagent reduction and staged kerosene replenishment system from roughing to cleaning. This allows for selective inhibition of copper sulfide minerals such as chalcopyrite at extremely low dosages, with minimal impact on the floatability of molybdenite. It completely avoids the use of toxic substances such as cyanide, Knox reagent, or sodium sulfide, exhibiting good selectivity, low reagent consumption, environmental friendliness, and a simple preparation process that is easy to industrialize.

The invention relates to the field of electrocatalytic CO2 reduction reaction catalysts, and discloses a nitrogen-doped carbon-based monatomic catalyst and a preparation method and application thereof.The preparation method comprises the steps that zinc salt is dissolved in absolute methanol, and a metal salt solution is obtained; the preparation method comprises the following steps: dissolving 2-methylimidazole in absolute methanol to obtain a ligand solution; mixing the metal salt solution and the ligand solution for liquid phase reaction to obtain a ZIF-8 precursor; a nickel source and a ZIF-8 precursor are placed on the upstream and the downstream of a tubular furnace respectively and calcined in the nitrogen atmosphere, metal particles are removed through acid pickling after cooling, and the nitrogen-doped carbon-based monatomic catalyst is obtained. Nickel atoms are confined in a ZIF-8 precursor by adopting a steam blowing and confinement method, and the nitrogen-doped carbon-based monatomic catalyst with a nickel monatomic-nitrogen coordination structure is formed after calcination, so that the size of the monatomic catalyst is optimized, a Ni-N coordination active center is introduced, and the selectivity of producing CO by reducing CO2 through electro-catalysis is improved.

The present invention discloses a continuous extraction method for microalgae active ingredients, comprising the following steps: after harvesting Scenedesmus, hot water extraction is carried out at a hot water temperature of 75-90 °C, the supernatant and algal sludge A are collected, the supernatant is subjected to alcohol precipitation to obtain crude polysaccharide; anhydrous methanol is added to algal sludge A, and ultrasonic extraction is carried out, the supernatant and algal sludge B are respectively collected, and the supernatant is the methanol extract; a chloroform and methanol mixed solution with a volume ratio of chloroform to methanol of 1.5-2.5:1 is added to algal sludge B, ultrasonic-assisted extraction is carried out, and the supernatant is collected to obtain crude lipid. This method can simultaneously improve the extraction rate of the methanol extract and the content of neutral lipids in the crude lipid, and the total amount of the extract can reach 39%, which can effectively reduce the remaining amount of algal residue after extraction, providing a new method for the application of microalgae biomass.

The application relates to the technical field of natural medicinal chemistry, and specifically discloses a triterpenoid compound and application, and a preparation method of the compound. The preparation method comprises the following steps: drying and crushing schisandra chinensis roots to obtain dried and crushed schisandra chinensis roots, extracting the dried and crushed schisandra chinensis roots by using 70% ethanol water solution under negative pressure cavitation, combining and concentrating the extract to obtain a crude extract, separating the crude extract by using a D101 macroporous adsorption resin, eluting the crude extract by using water, 30% ethanol, 70% ethanol and 90% ethanol in sequence, collecting a 70% ethanol elution part, performing MCI column chromatography on the 70% ethanol elution part, performing gradient elution on the 70% ethanol elution part by using methanol-water, collecting a depigmentation sample, performing ODS column chromatography on the depigmentation sample, performing gradient elution on the depigmentation sample by using water-methanol, collecting a target component, and purifying the target component by using a preparative high performance liquid chromatograph to obtain the target compound. The application separates a novel triterpenoid compound from schisandra chinensis roots for the first time, expands the development range of medicinal resources of schisandra chinensis plants, simultaneously provides a novel structure mother nucleus and a candidate active molecule for anticancer drug research and development, and enriches the research and development reserves of antitumor natural medicines.

The invention belongs to the technical field of catalyst preparation, and particularly relates to an efficient hydrophobic methanol catalyst and a preparation method thereof.The method comprises the steps that raw materials such as copper salt, zinc salt and aluminum salt are prepared, the total molar ratio of copper to zinc to aluminum is preset, and the zinc salt and the aluminum salt are split according to the deviation smaller than or equal to 10% from the total molar ratio; preparing a first salt solution, a second salt solution, an auxiliary solution and an alkali solution; the method comprises the following steps: establishing a first liquid level of a reaction kettle, adding a first salt solution and alkali liquor in a parallel flow manner at a preset temperature and pH value to construct a core phase, then adding a second salt solution, an auxiliary agent solution and the alkali liquor to form a coating layer, and heating for aging; washing, drying and roasting to prepare a catalyst precursor; preparing a hydrophobic component solution and an oxide precursor solution, mixing and hydrolyzing to obtain a composite hydrophobic solution; and dipping a precursor in the solution, and drying to obtain the product. The problem of water-induced inactivation of a traditional catalyst is solved, the CO2 conversion rate and methanol selectivity are improved, the inactivation rate is reduced, and the process is suitable for industrial production.

The invention relates to the technical field of vegetable and fruit pesticide residue detection, in particular to a method and a system for separating and determining ethiprole enantiomer residue in grapes by ultra performance convergence chromatography. The method comprises the following steps: extracting a sample twice by 1% acetic acid acetonitrile, performing rotary evaporation concentration, redissolving by dichloromethane / methanol, purifying by adopting an amino solid-phase extraction column, concentrating, fixing the volume by isopropanol / n-heptane (1: 9), and filtering. The method comprises the following steps: separating by using a Trefoil CEL2 chiral chromatographic column, carrying out gradient elution at 35 DEG C and 10.3 MPa by using supercritical CO2 as a main mobile phase and 0.5% ammonia water methanol as a modifier, detecting PDA at 280 nm, and carrying out external standard quantification. The method is rapid in separation and good in peak shape, the linear range is 0.5-20.0 mg / L, the LOQ is 0.1 mg / kg, the adding standard recovery rate is 80.0%-108%, the RSD is 3.1%-8.4%, and the method is suitable for monitoring ethiprole enantiomer residues in grapes.

The invention provides a preparation method of sulfydryl grafted sponge structure biochar for removing new pollutants, which comprises the following steps: step S1, placing a cow dung precursor in a porcelain boat, then transferring into a tubular furnace, and heating in N2 atmosphere for calcining reaction; s2, after cooling to room temperature, washing the calcined product to ionic strength by using pure water and absolute methanol in a suction filtration and washing manner, so as to obtain original sponge structure biochar; s3, mixing and dispersing the sponge structure charcoal, 6-mercaptopyridine-3-carboxylic acid and N, N '-dicyclohexylcarbodiimide into an N, N-dimethylformamide organic solvent, and carrying out ultrasonic mixing and uniform dispersion; s4, heating the mixed solution in an oil bath under the condition of N2, cooling the mixed solution to room temperature, washing the mixed solution with pure water, and performing vacuum drying to obtain the sulfydryl graft modified sponge structure biochar.

This invention provides a compound for recognizing chiral amino alcohols, a fluorescent probe, its preparation method, and its application. Naphthol and sodium hydride are weighed and dissolved separately in ultra-dry tetrahydrofuran, mixed, and then reacted with bromomethyl methyl ether. The mixture is extracted with ethyl acetate, and the organic phases are combined to obtain product (R)-1. This product is dissolved in ultra-dry tetrahydrofuran, and n-butyllithium is added. The reaction system changes from colorless to brown, and the reaction is allowed to return to room temperature. Ultra-dry N,N-dimethylformamide solution is then added, and the reaction is quenched by adding saturated ammonium chloride solution under ice-water bath conditions. The product is then extracted with ethyl acetate to obtain product (R)-2. Product (R)-2 is dissolved in a mixed solvent of tetrahydrofuran and anhydrous methanol, and sodium triacetoxyborohydride is added. The product is then extracted with ethyl acetate to obtain reduced product (R)-3. Product (R)-3 is dissolved in a mixed solvent of dichloromethane and anhydrous ethanol, and concentrated hydrochloric acid is added. After the reaction is complete, the reaction is quenched with sodium bicarbonate, and then extracted with dichloromethane to finally obtain compound (R)-4, which recognizes chiral amino alcohols.

The application discloses preparation of carbazolyl 3,5-dicyanopyridine derivatives, room temperature phosphor and anti-counterfeiting performance thereof. The preparation method comprises the following steps: adding ortho-, meta- or para-carbazolyl benzaldehyde and malononitrile into a reaction bottle, stirring and reacting under room temperature conditions with sodium hydroxide as a catalyst and anhydrous methanol as a solvent, and obtaining ortho-, meta- or para-carbazolyl 3,5-dicyanopyridine by separating and purifying the reaction crude product. Crystals of the three compounds are obtained by a solvent diffusion method with dichloromethane-petroleum ether as a solvent, and the crystal state room temperature phosphor material is obtained. The crystals are doped with urea / triphenylphosphine at a weight ratio of 1:100, the doped crystals are uniformly ground and mixed, and then heated to be molten, so that the host-guest doped phosphor material is obtained, and the novel material is used in the field of anti-counterfeiting patterns.

The invention discloses a preparation method and application of 1, 4-bis (diphenylphosphine) butane platinum dichloride (II), and the preparation method comprises the following steps: (1) mixing absolute methanol and dichloromethane, carrying out deoxidation treatment, and adding 1, 4-bis (diphenylphosphine) butane into the mixture; (2) dissolving potassium chloroplatinite in distilled water, filtering insoluble impurities, dropwise adding the potassium chloroplatinite into the reaction system in the step (1) under the protection of inert gas while keeping a stirring state, and after dropwise adding, heating, refluxing and stirring for reaction; (3) carrying out filter pressing under the protection of inert gas, passing through a silica gel column, and collecting filtrate; (4) concentrating the filtrate, and then adding an organic solvent for pulping; and (5) carrying out filter pressing under the protection of inert gas, washing a filter cake, and carrying out vacuum drying. According to the preparation method, the product yield is high, the purity is high, and the obtained 1, 4-bis (diphenylphosphine) butane platinum dichloride (II) is used for hydrogenation reaction of carbonyl compounds and has good catalytic performance.

The application provides a method for preparing an M-phase VO2 film by a light-assisted spray pyrolysis method and the M-phase VO2 film prepared by the method, and belongs to the field of nanometer materials. The method comprises the following steps: (1) preparing a vanadium dioxide spraying liquid: adding vanadium oxyacetonylacetone into anhydrous methanol, stirring and aging to obtain a vanadium dioxide spraying liquid with ultraviolet photosensitive properties; (2) preparing a vanadium dioxide film: introducing the vanadium dioxide spraying liquid in step (1) into an atomizer and spraying onto a substrate coated with a TiO2 anatase phase under ultraviolet light irradiation to obtain the M-phase VO2 film. The method enables vanadium ions to be chelated in the sol by stirring, and the vanadium dioxide spraying liquid has ultraviolet photosensitive properties. The purity of the VO2(M) film is improved by introducing a titanium dioxide transition layer, and the microstructure of the VO2(M) film is improved by ultraviolet light irradiation, thereby improving the visual transmittance and solar light regulation rate of the VO2(M) film.

The invention provides a novel crystalline porous organic salt membrane as well as a preparation method and application thereof, and belongs to the technical field of membrane separation. The preparation method of the crystalline porous organic salt film comprises the following steps: adding a PAN film into a NaOH solution for reaction, washing a reaction product, adding the reaction product into an HCl solution for continuous reaction, and washing again to obtain a PAA substrate; the method comprises the following steps: adding a crystalline porous organic salt solid into absolute methanol, then adding ammonia water, carrying out ultrasonic treatment to obtain a solution A, and adding the solution A onto a PAA substrate to obtain the crystalline porous organic salt film. The crystalline porous organic salt membrane provided by the invention is simple in preparation method and low in cost, also has the advantages of high permeation flux and good stability, can efficiently separate water and ethanol, and has excellent selectivity.

The invention belongs to the technical field of sewage treatment, and particularly relates to a calcium carbonate-based phosphorus removal agent and a preparation method and a phosphorus removal method thereof. Comprising the following steps: preparing a lanthanum layer on the surface of calcium carbonate by adopting a magnetron sputtering process to obtain a first material; spraying inorganic acid on the surface of the first material to form defects on the surface of the first material, and then cleaning the first material in water to remove residual inorganic acid so as to prepare a second material; terephthalic acid, absolute methanol and DMF are prepared into a solution, then the second material is placed in the solution, and La-O bonds are formed on the surface of the second material; and then adding a soluble metal salt ligand, and coordinating metal ions with terephthalic acid to prepare the calcium carbonate-based phosphorus removal agent. The calcium carbonate-based phosphorus removal agent provided by the invention can effectively remove phosphorus in a water body, and compared with a traditional chemical reagent, the removal effect is remarkably improved, the dosage of the reagent is favorably reduced, and further development of chemical phosphorus removal is favorably promoted.

The application discloses a metal fluoride-coated silicon-carbon negative material and a preparation method thereof. The preparation method comprises the following steps: S100, performing gas phase deposition on the pore channel and the outer surface of the porous carbon by using a silane gas source and a carbon gas source in an inert gas to obtain a first product; S200, performing drying on the first product, a metal source and an ammonia source after water bath heating and stirring in a solvent, and then performing heat treatment on the obtained solid product in an inert atmosphere to obtain a second product coated with metal oxide, wherein the solvent is one or more of ethanol, distilled water, methanol and acetone; and S300, mixing the second product with ammonium fluoride and performing ball milling, and then performing heat treatment to obtain the metal fluoride-coated silicon-carbon negative material. Firstly, the silicon atoms, the carbon atoms and the carbon atoms on the surface of the porous carbon are chemically bonded by gas phase deposition, and the first product is coated with metal fluoride, which is beneficial to the formation of a stable solid electrolyte interface film and the improvement of the cycle life.

This invention provides a Pt single-atom / cluster co-supported NiCo layered bimetallic oxide material, its preparation method, and its application. The preparation method includes: adding cobalt salt and 2-methylimidazole to an anhydrous methanol solution and stirring at room temperature; after the reaction is complete, centrifuging to collect the product, repeatedly washing, and drying to obtain a zeolite-like imidazolium ester framework material, Co-ZIF; adding Co-ZIF, nickel salt, and platinum source to an anhydrous ethanol solution and stirring at room temperature; after the reaction is complete, centrifuging to collect the product, repeatedly washing, and drying to obtain a Pt-supported NiCo layered bimetallic hydroxide material; and calcining the Pt-supported NiCo layered bimetallic hydroxide material to obtain a Pt single-atom / cluster co-supported NiCo layered bimetallic oxide material. The material of this invention exhibits excellent catalytic activity, demonstrating superior activity and stability in the hydrogen evolution reaction in alkaline electrolytes.

The invention relates to the technical field of adsorption materials, and particularly discloses a molecularly imprinted hydrogen bond organic framework adsorption material as well as a preparation method and application thereof. According to the material, tetra (4-sulfonyl phenyl) methane and 1, 1 '-diamino-4, 4'-dipyridyl diiodide are used as construction units to form a hydrogen bond organic framework substrate, and a hemp essence drug template molecule is introduced to construct a specific imprinting hole in the hemp essence drug template molecule. The preparation method is characterized in that the molar ratio X of template molecules to tetra (4-sulfonyl phenyl) methane is controlled to be 0.05-0.5, crystallization is performed in a water / methanol mixed solvent, and then elution and activation are performed through an acid solution with the pH being 2-4. The material has the advantages of high adsorption capacity, no less than 58 mg / g of template molecule adsorption capacity, high selectivity and rapid adsorption kinetics, achieves balance within 5 minutes, can efficiently enrich trace hemp extract drugs from a water environment or biological fluid, and solves the technical problem that the selectivity, the capacity and the mass transfer rate of the existing adsorption material are difficult to consider at the same time.

The invention discloses a Fe-modified TiO2 hollow microsphere photo-Fenton catalyst as well as a preparation method and application thereof, and relates to the technical field of catalyst preparation, and the preparation method comprises the following steps: preparing TiO2 microspheres with hollow structures from hexadecyl trimethyl ammonium bromide, absolute methanol, deionized water and tetrabutyl titanate; the method comprises the following steps: mixing ferrocene and 0.25 C-TiO2 powder, putting the mixture into a quartz tube, putting the quartz tube into a muffle furnace, heating and pyrolyzing according to a two-stage program, alternately washing black powder with absolute ethyl alcohol and deionized water after the pyrolysis is finished, and drying to obtain a sample CT-5Fe; the preparation method comprises the following steps: dispersing CT-5Fe in an H2O2 solution, carrying out a water bath reaction, collecting a gray product, carrying out centrifugal operation, washing, and drying to obtain the Fe-modified TiO2 hollow microsphere photo-Fenton catalyst, namely CT-5Fe-HO. According to the invention, a photocatalysis-Fenton-like coupling system for phenol degradation is constructed, the PMS adsorption and activation capability is enhanced, high activity and good cycle stability are maintained in a wide pH range and in a complex water body, and a solution is provided for water body pollution treatment.