193results about How to "Large adsorption capacity" patented technology

The invention relates to the field of functional master batch materials, in particular to a phase-change energy temperature-adjusting fiber master batch and a fat-burning fabric thereof. The phase-change energy temperature-regulating fiber master batch is prepared from a composite phase-change material and polyethylene glycol terephthalate slices through melt extrusion and granulation, the fat-burning fabric is prepared from the phase-change energy temperature-adjusting fiber master batch and polyethylene glycol terephthalate slices through melt spinning, network compounding and weaving processing. By introducing the microencapsulated phase-change material and the high-thermal-conductivity filler, in the melt extrusion process, the microencapsulated phase-change material and the high-thermal-conductivity filler can be uniformly dispersed in the matrix material to form stable fiber master batches, form an efficient thermal-conductivity structure and provide excellent thermal regulation performance; meanwhile, microencapsulation can improve the stability and dispersity of the phase-change material, and the fat-burning fabric is prepared through melt spinning and weaving of fiber master batches, so that the heat-conducting property of the product is improved, and the continuous fat-burning effect is achieved.

The present invention relates to a method for preparing a attapulgite / molecular sieve composite adsorbent, comprising the following steps: (1) using NaX molecular sieve powder as a raw material, adding purified attapulgite, grinding, adding an aluminum source for crystallization, filtering, washing to a pH of 7 to 8, and drying to obtain a attapulgite / molecular sieve composite adsorbent precursor; (2) exchanging the composite adsorbent precursor obtained in step (1) with metal cations, and then filtering, washing, drying, molding, and activating to obtain the composite adsorbent. The composite adsorbent has a simple preparation method, a large adsorption capacity, and good selectivity. It can effectively adsorb and separate liquid mixtures, and has broad application prospects in selectively adsorbing and separating p-xylene from C8 aromatic isomers. The present invention also relates to a attapulgite / molecular sieve composite adsorbent and its application in adsorbing and separating p-xylene in mixed xylene.

The invention provides a biochar loaded sulfur modified zero-valent iron material and application thereof in groundwater remediation, and particularly relates to the technical field of inorganic materials. According to the biochar-loaded sulfur-modified zero-valent iron material, sulfur-modified zero-valent iron is loaded in a porous structure of biochar; the sulfur modified zero-valent iron has a core-shell structure; wherein the inner core of the core-shell structure is zero-valent iron, and the outer shell of the core-shell structure is iron sulfide. According to the biochar-loaded sulfur-modified zero-valent iron material provided by the invention, a sulfide layer is formed on the surface of zero-valent iron, so that a zero-valent iron core is prevented from being in direct contact with water or dissolved oxygen, and the durability of the zero-valent iron core is improved. Delocalized electrons in the sulfide layer promote the electron transfer process, and the catalytic performance of the material is enhanced. The biochar loaded sulfur modified zero-valent iron material provided by the invention is high in stability and wide in application range. Due to the multifunctionality of the material, the material has potential application value in a plurality of fields such as environmental restoration and pollutant degradation.

The invention discloses three-dimensional hydrophobic modified activated carbon, which is characterized in that hydrophobic carbon chains are grafted inside and outside activated carbon pores, and the hydrophobic carbon chains are trichlorosilane with different carbon chain lengths. The invention also discloses a preparation method of the three-dimensional hydrophobic modified activated carbon, and the preparation method comprises the following steps: (1) pretreatment: the activated carbon is firstly placed in distilled water for ultrasonic cleaning for 5-10 min, then soaked in a pretreatment activation solution for 5-10 min, and then placed in a drying oven for drying, and the pretreatment activation solution is an ammonia water solution with the pH value of 8-9; (2) three-dimensional modification: taking 5-10 parts by weight of a modifier, dropwise adding the modifier into 20-50 parts by weight of a solvent to obtain a modifier solution, soaking 10-15 parts by weight of pretreated activated carbon into the modifier solution, sealing the whole reaction system, and immediately soaking the reaction system in an ultrasonic environment for 2-4 hours; and (3) post-treatment: cleaning the impregnated activated carbon with a solvent, and carrying out vacuum drying in a vacuum drying oven at 100-150 DEG C for 5-12 hours to obtain the three-dimensional hydrophobic modified activated carbon.

The invention relates to the field of motor vehicle exhaust purification, and particularly discloses an environment-friendly low-temperature vehicle tail gas treatment fluid and a preparation method thereof. The environment-friendly low-temperature vehicle tail gas treatment liquid is prepared from the following raw materials in percentage by weight: 32.5% of vehicle-grade high-purity urea, 3 to 5% of polyethylene glycol, 2 to 3.5% of glycerol, 5 to 6.5% of octadecanol polyoxyethylene ether, 6.5 to 10% of bacterial cellulose aerogel nano powder and the balance of ultrapure water. The tail gas treatment liquid is safe to use, lower in freezing point, suitable for being used in winter in northern cold regions and better in tail gas treatment effect.

The invention belongs to the technical field of water treatment, and particularly relates to an iron-carbon composite material, a preparation method of the iron-carbon composite material and application of the iron-carbon composite material to synchronous removal of perfluoro and polyfluoroalkyl compounds. According to the iron-carbon composite material provided by the invention, the iron metal element is anchored on the carbon carrier material in a nanocluster form, so that the problem of new pollution caused by iron dissolution is avoided, and the iron-carbon composite material is high in adsorption rate, large in adsorption capacity, recyclable and good in long-term stability. According to the invention, the PFAS is captured through hydrophobic interaction and electrostatic attraction by utilizing the coding characteristics, excellent adsorption performance is shown in treatment of various pollutants, rapid, efficient and synchronous removal of the PFAS is realized, and meanwhile, the high utilization rate of the iron-carbon composite material is ensured. As an adsorbent, the iron-carbon composite material provided by the invention is particularly suitable for repairing a perfluorooctanoic acid and / or perfluorooctane sulfonic acid combined polluted water body, the repairing is efficient, the cost is low, the removal condition of pollutants can be accurately judged, and the iron-carbon composite material is suitable for underground water or surface water.

The invention discloses a sludge carbon loaded Schwertmannite immobilized iron-sulfur reducing bacteria composite material as well as a preparation method and application thereof. The method comprises the following steps: performing high-temperature pyrolysis on sludge to obtain sludge carbon; mixing the sludge carbon with a ferrous sulfate solution, then adding a hydrogen peroxide solution to carry out oxidation reaction, and carrying out solid-liquid separation to obtain a sludge carbon loaded Schwertmannite material; and adding the sludge carbon-loaded Schwertmannite material into a culture medium containing iron-sulfur reducing bacteria, carrying out bacterial culture until the culture medium is black, and carrying out solid-liquid separation to obtain the sludge carbon-loaded Schwertmannite material. The obtained mineral microorganism composite material is excellent in adsorption performance, large in adsorption capacity and high in stability, can efficiently remove heavy metal ions such as Sb (V), Cd (II) and Pb (II), and is particularly suitable for repairing heavy metal pollution in mining areas.

The invention relates to the field of resin synthesis, in particular to functionalized hierarchical pore adsorption chelating resin as well as a preparation method and application thereof. According to the functionalized hierarchical pore adsorption chelating resin, the particle size is 0.65-1.2 mm, the specific surface area is 550-1500 m < 2 > / g, the pore volume is 0.4-1.8 cm < 3 > / g, the proportion of micropores is 15-35%, the proportion of mesopores is 25-40%, and the proportion of macropores is 25-60%. Micropores, mesopores and macropores of the functionalized hierarchical pore adsorption chelating resin are uniformly distributed, the particle size is moderate, the specific surface area and pore volume are relatively large, and the functionalized hierarchical pore adsorption chelating resin has relatively large adsorption capacity on copper ions, nickel ions and lead ions.

The invention discloses an application of a modified carbon fiber loaded lanthanum composite material as a phosphorus adsorbent, belongs to the field of ecological pollution control engineering, and particularly relates to a technology for phosphorus adsorption and resource utilization of an impregnation method modified carbon fiber loaded lanthanum composite material in eutrophicated water. The prepared carbon fiber loaded lanthanum composite material has the advantages of high phosphate adsorption capacity, no influence of other anions on the adsorption performance, recyclability, simple preparation process, low cost and the like, and has a wide application prospect in the aspect of treating eutrophic water.

The invention relates to the technical field of separation and purification, in particular to a preparation method of a high-purity scandium oxide adsorbent with a mesoporous silicon-based shell, and aims to solve the technical problems in the prior art. According to the silicon-based adsorbent, the preparation method of the silicon-based adsorbent and the application of the silicon-based adsorbent to adsorption of associated impurities of scandium in rare earth ore liquid, the silicon-based adsorbent containing aluminum is large in scandium ion adsorption capacity and good in selectivity and has good application prospects in the aspect of a rare earth purification process. In order to solve the technical problem, the scheme provided by the invention is as follows: the adsorbent takes amorphous mesoporous silica as a skeleton, and organic functional group solvent mixing treatment is performed after the amorphous mesoporous silica is synthesized, so that resin groups are uniformly distributed on the surface of the skeleton and in the skeleton.

The invention discloses an aluminum adsorbing material for extracting lithium from a salt lake as well as a preparation method and application of the aluminum adsorbing material. The aluminum adsorbing material for extracting lithium from the salt lake is a compound of aluminum adsorbent powder and a high-molecular polymeric material, the aluminum adsorbent powder is composed of LiXAl (OH) 3. NH2O, X is at least one of Cl, SO4, CO3, PO4 and NO3, and the mass ratio of the aluminum adsorbent powder to the high-molecular polymeric material is 1.0: (0.5-1.0). The salt lake lithium extraction aluminum adsorption material provided by the invention singly adsorbs lithium ions, can efficiently extract lithium ions in brine, meets the adsorption and extraction of low-concentration lithium-containing brine, and can be recycled, regenerated and reused. The aluminum adsorption material for extracting lithium from the salt lake is stable in structure, relatively large in specific surface area and relatively high in adsorption performance, and is expected to be widely applied to extracting lithium from the salt lake.

The invention discloses a preparation method of an ionic metal organic framework and rare earth separation application, and belongs to the technical field of resource recovery. According to the method, the three-dimensional ionic metal organic framework material is prepared, and a large number of open type nano trap pockets composed of carboxyl and amino which are not coordinated exist in the framework and are matched with rare earth ions in size. The three-dimensional frame structure can also provide an efficient ion transmission channel, and diffusion of rare earth ions in holes can be accelerated. In addition, counter cations Zn (H2O) 6 < 2 + > in the framework and lanthanide hydrated ions are subjected to ion exchange, diffusion of rare earth ions in pore channels is further promoted, the utilization rate of effective adsorption sites is increased, and the separation effect on rare earth is enhanced. The three-dimensional ionic metal organic framework synthesized by the method has good application potential in the aspects of rare earth enrichment and separation.

The invention provides an electro-adsorption material for electrochemically extracting bromine as well as a preparation method and application of the electro-adsorption material. The electro-adsorption material comprises bismuth oxybromide nanosheets and poly (3, 4-ethylenedioxythiophene) loaded on the surfaces of the bismuth oxybromide nanosheets, and the mass ratio of the bismuth oxybromide nanosheets to the poly (3, 4-ethylenedioxythiophene) is (1-10): (0.1-5). The electro-adsorption material provided by the invention has relatively large adsorption capacity, good cycle stability and excellent selective adsorbability, still has adsorption capacity for a solution with the bromine ion content lower than 100mg / L, and is suitable for being applied to extraction of bromine from oilfield brine.

The invention provides a zinc-based metal organic framework material as well as a preparation method and application thereof. The zinc-based metal organic framework material comprises a mixed coordination framework which is formed by coordination of N and O and has pcu topology, and the minimum asymmetric unit of the zinc-based metal organic framework material is composed of three zinc ions, three deprotonated 1H-indazole-5-carboxylic acids and bridging water molecules. The preparation method comprises the following steps: heating a zinc salt aqueous solution to a reaction temperature, keeping for 30-40 minutes, cooling, and filtering for later use; dissolving an organic ligand in an organic solvent to obtain a ligand solution, heating to a reaction temperature, keeping for 30-40 minutes, and filtering for later use; mixing the standby solutions obtained by respective filtration, removing impurities, and adding a regulator to obtain a mixed solution; and carrying out standing reaction and purification treatment. The zinc-based metal organic framework material provided by the invention is a porous material formed by coordination self-assembly of an organic ligand and zinc ions, has a large specific surface area and aromatic ring modified pore walls, is more beneficial to adsorption of propylene and propane and weakening of adsorption of other low-carbon hydrocarbons, and is high in separation selectivity.

The invention discloses a method for separating aluminosilicate minerals and purifying quartz sand under a neutral condition and application of the method. The method for separating the aluminosilicate minerals and purifying the quartz sand under the neutral condition adopts one or more reverse flotation operation, and the reverse flotation operation comprises the following steps: adding a quartz inhibitor into quartz raw sand ore pulp or high-quality quartz sand ore pulp with low aluminum content obtained by the last reverse flotation operation, and uniformly mixing; then adding an aluminosilicate mineral collecting agent, and uniformly mixing; then adding a foaming agent under the condition of air-blowing stirring, carrying out quartz reverse flotation, and keeping stirring and scraping bubbles during the process; and after the reverse flotation is finished, washing the residual ore pulp to obtain high-quality quartz sand with low aluminum content. The reverse flotation technology is carried out under the neutral condition, traditional strong acid and strong alkali are prevented from being used, and therefore the harm of the purification technology to production equipment, the ecological environment and operators is reduced.

The invention provides an efficient and recyclable electro-adsorption method for removing perfluorinated compounds in water and an electrode material by taking the most widely distributed perfluorinated butanesulfonic acid in the perfluorinated compounds as a target. Chitosan and magnetic nano ferroferric oxide are selected as raw materials for modifying activated carbon to prepare a nano Fe3O4 / chitosan / activated carbon composite electrode, the nano Fe3O4 / chitosan / activated carbon composite electrode is used as an anode, activated carbon is used as a cathode, 0.8-5V working voltage is applied, and the composite electrode is used for electro-adsorption and desorption of perfluorinated compounds in water. Therefore, on-line adsorption, desorption and concentration of the perfluorinated compounds are realized, and the purposes of controllable and efficient removal, enrichment and recovery of the perfluorinated compounds are achieved.

The invention discloses a preparation method of a Cu < + >-based loaded dual-MOF (Metal Organic Framework) composite material, which is a dual-MOF adsorption material prepared by taking high-stability ZIF-8 as a core, Cu-BTC as a growth layer and methanol as a growth environment. The method comprises the following steps: preparing high-stability ZIF-8 as a core MOF material, and adding a metal organic framework and an inorganic ligand into an organic solvent to realize in-situ uniform growth of Cu-BTC; a normal-temperature impregnation method is adopted, CuCl is used as a loading material, and the Cu < + >-based loaded dual-MOF composite material is prepared. By utilizing sp2 hybridization of CO functional groups, the CO adsorption performance is improved through pi-pi interaction. The preparation process is simple, easy to operate and low in equipment requirement, the production cost and difficulty are reduced, and the adsorbent has excellent adsorption properties such as large CO adsorption capacity, high adsorption speed, good stability and good selectivity; the catalyst is suitable for CO adsorption treatment in most industrial environments.

The invention relates to the technical field of adsorbent preparation, in particular to an imidazolium salt polymer adsorbent as well as a preparation method and application thereof. The preparation method of the imidazolium salt polymer adsorbent comprises the following steps: mixing a polybromophenyl organic compound, imidazole, alkali and a catalyst, and carrying out nucleophilic substitution reaction under the action of the catalyst and the alkali to obtain a triimidazolyl organic monomer; the preparation method comprises the following steps: dissolving a triimidazolyl organic monomer and 1, 4-di (bromomethyl) benzene in an organic solvent, and carrying out quaternization reaction to obtain the imidazolium salt polymer adsorbent. The imidazolium salt polymer adsorbent prepared by the method disclosed by the invention not only can accurately identify and adsorb Cr2O7 < 2-> and remarkably improve the removal efficiency of Cr2O7 < 2->, but also can keep an efficient working state in a wide pH value range. Meanwhile, the material can be easily separated from wastewater and can be repeatedly used after being subjected to simple regeneration treatment, so that cyclic utilization of resources is realized.

The utility model relates to a vehicle-mounted activated carbon filter element and assembly for air purification and an air purifier. The activated carbon filter element comprises a main body and through holes, the through holes are formed in the main body and are arranged in an array mode, and the through holes are straight through holes; the main body is made of an activated carbon material, and the activated carbon filter element is integrally formed. The filter element assembly comprises a shell, a clamp and an activated carbon filter element, and the activated carbon filter element is arranged in the shell; the activated carbon filter element assembly is used for fixing the filter element assembly to an air outlet of the vehicle-mounted air conditioner, and the activated carbon filter element is adopted. Compared with the prior art, the carbon base material is adopted, so that the carbon adsorption material has the characteristics of small volume, large adsorption capacity and small resistance. In addition, the carbon base material can thoroughly adsorb and remove harmful gas, and compared with odor covering of aromatherapy, the activated carbon filter element can thoroughly adsorb TVOC and odor, and secondary pollution cannot be caused.

The present invention discloses a method for preparing porous microspheres for supporting catalysts, which are obtained by hot pressing inorganic materials and resins and then sintering. The microspheres are inorganic nanoporous microspheres, which are strong and have many holes and can absorb a large amount of catalysts. The present invention also discloses that the porous microspheres supporting the catalyst of the present invention are used for catalytic hydrogenation reactions in fixed bed reactors, and are applied to nitro reduction reactions of nitro compounds, especially reduction of dinitro compounds and polynitro compounds. The obtained amino compounds have high purity and high conversion rate, and the catalyst has strong durability and can be recycled for multiple times and for a long time.

The invention belongs to the technical field of water treatment, and discloses an application of biochar to adsorption of heavy metal thallium in water, the biochar is obtained by pyrolysis of camellia oleifera shells, the camellia oleifera shell biochar is added into thallium-containing water with the concentration of 1 microgram / L-100 mg / L, and constant-temperature oscillation adsorption is performed. The camellia oleifera shell charcoal is used as the adsorbent, the source of the camellia oleifera shell charcoal is simple, the camellia oleifera shell charcoal can be used for adsorbing heavy metal thallium in wastewater, especially the effect of adsorbing trace thallium-containing wastewater is excellent, the removal effect can reach the underground water III-class standard, and the camellia oleifera shell charcoal can be recycled.

This utility model discloses an ozone advanced oxidation tail gas recovery and utilization device, including an ozone tail gas inlet pipe and a primary purification tower and a secondary purification tower connected in sequence. The rear end of the secondary purification tower is connected to an ozone buffer tank. The primary and secondary purification towers are connected to the ozone tail gas inlet pipe through an ozone circulation pipe. Both the primary and secondary purification towers are connected to sodium hydroxide dosing tanks. This application uses a secondary ozone purification tower to purify the tail gas after ozone catalytic oxidation, recover and utilize the remaining ozone, improve ozone utilization rate, and reduce costs. At the same time, it absorbs the carbon dioxide after catalytic oxidation to produce a high-purity sodium carbonate solution for downstream use as a raw material, achieving waste resource recycling.

The application relates to the technical field of catalysts, and discloses a limited type iodine-based homogeneous immobilized catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and iodine ions, magnesium ions and quaternary ammonium ions loaded on the carrier, wherein the molar ratio of the magnesium ions, the quaternary ammonium ions, the iodine ions and the carrier is 0.01-1:4-15:1-30:1. The limited type iodine-based homogeneous immobilized catalyst disclosed by the application enhances the electrostatic interaction between iodine ions and quaternary ammonium ions through the molecular sieve limiting effect to construct a limited type structure. The catalyst has significantly enhanced CO2 adsorption and activation capacity, can activate an epoxide compound, and accelerates the ring opening of the epoxide compound. In a cycloaddition reaction catalyzed by the catalyst under the conditions of no solvent and no auxiliary agent, the conversion rate of propylene oxide can reach more than 73%, and the propylene carbonate selectivity can reach more than 85%.

The present invention belongs to the technical field of lithium ion adsorbent preparation, and specifically discloses a method for preparing a modified aluminum-based composite lithium adsorbent. The modified aluminum-based composite lithium adsorbent prepared by the present invention is prepared by hydrothermal reaction of soluble aluminum salt and lithium salt in urea aqueous solution to obtain aluminum-based adsorbent precursor precipitate; then soaking it in a lithium hydroxide solution of a certain temperature and concentration for a certain period of time, and then adding manganese salt to perform hydrothermal reaction to prepare an aluminum-based adsorbent precursor of an in-situ grown manganese-based ion sieve; finally, the lithium ions are eluted by acid washing and dried to obtain. The modified aluminum-based composite lithium adsorbent prepared by the method of the present invention has the advantages of high adsorption capacity, good cycle stability, and a wide range of brine applications.

This invention provides a multi-puff electronic cigarette cartridge and an electronic cigarette system used in conjunction with the cartridge. The cartridge includes a cartridge shell (9) and a cartridge bottom cover (5). The bottom cover (5) has a vertically penetrating atomizing carrier cavity (51) in the middle, and the atomizing carrier cavity (51) houses the oil-storing heating component. The oil-storing heating component includes a magnetic heating element (6) and an electronic cigarette atomizing carrier (7) fitted together. The magnetic heating element (6) is at least partially hollowed out in a tubular shape, and at least part of the material of the magnetic heating element (6) is metal. The middle part has a smoke flow channel (61) arranged along the length direction. Electronic cigarette atomizing agents are adsorbed in the electronic cigarette atomizing carrier (7). The cartridge of this invention sets the magnetic heating element and the electronic cigarette atomizing carrier together and installs them in the bottom cover, which has the characteristics of simple structure and easy manufacturing.

The invention provides a preparation method of a granular manganese lithium ion adsorbent, and belongs to the technical field of lithium extraction adsorbents, the preparation method comprises the following steps: dissolving a lithium salt and a manganese salt in water together to obtain a lithium-manganese solution, and adding a carrier molecular sieve into the lithium-manganese solution to obtain a mixed solution; adding a precipitant and a complexing agent into the mixed solution, and stirring to react for a certain time to obtain a reaction solution; aging the reaction liquid, then carrying out solid-liquid separation, and drying the obtained precipitate to obtain a coprecipitation carrier; and carrying out high-temperature roasting on the coprecipitation carrier to obtain the manganese-based lithium ion adsorbent. The lithium ion adsorbent prepared by the method is granular and high in flowability, solves the problem of poor flowability of a powdery adsorbent in industrial application, and has excellent stability and adsorption capacity. The invention also provides the granular manganese lithium ion adsorbent.

The application provides a copper adsorption material and a preparation method and application thereof, and the copper adsorption material is prepared by using salicylic hydrazide monomers and methacrylic acid as raw materials through an emulsion polymerization method. The salicylic hydrazide monomers used in the application are salicylic hydrazide derivatives with introduced propylene bonds, and the multi-dentate coordination structure of the salicylic hydrazide derivatives can specifically chelate copper ions; the hydrophilic monomer used is methacrylic acid, and the carboxyl group of the methacrylic acid can bring good hydrophilic performance to the material and improve adsorption kinetics. The copper adsorption material of the application is applied to a mixed solution containing copper ions, nickel ions and cobalt ions to selectively separate copper ions.

The invention discloses porous adsorption resin for silane purification and a preparation method of the porous adsorption resin, and belongs to the technical field of silane production. The porous adsorption resin is prepared from the following components in parts by weight: 100 to 200 parts of deionized water, 10 to 30 parts of modified mesoporous magnetic particles, 20 to 40 parts of acrylic resin monomer, 5 to 15 parts of N, N-methylene bisacrylamide, 10 to 20 parts of polypropylene glycol monomethyl ether acrylate and 20 to 50 parts of initiator aqueous solution. The prepared porous adsorption resin can efficiently remove chloride ions and metal impurities in silane, the purity of a silane product is improved, the product purity can reach 99.998% or above, the requirement for the purity of silane in the high-end application field is met, good adsorption stability is achieved, bonding between the adsorption resin and the silane impurities is firmer, and the service life of the adsorption resin is prolonged. According to the present invention, the high adsorption capacity can be maintained after the multi-time cycle use, such that the purification precision and the purification effect are improved due to the appropriate pore size distribution, the selectivity on the impurity adsorption is provided, and the targeted adsorption can be performed according to the size and the property of the impurity molecule.

The invention belongs to the technical field of controlled release of spices and essences, and discloses an efficient adsorbent as well as a preparation method and application thereof. The preparation method of the efficient adsorbent comprises the following steps: mixing zirconium chloride, 2-hydroxy-1, 4-phthalic acid, a hydrochloric acid solution and N, N-dimethylformamide, and carrying out a reaction to obtain UiO-66-(OH) 2; the preparation method comprises the following steps: mixing water glass, 3-aminopropyltrimethylsilane and toluene, and reacting to obtain modified water glass; and mixing UiO-66-(OH) 2, the modified water glass, ammonia water and an ethanol water solution to obtain the adsorbent. According to the invention, the UiO-66 molecular sieve is subjected to hydroxyl modification, the hydroxyl and the heterocyclic perfume can form a hydrogen bond, a positive promotion effect is achieved for improving the adsorption capacity and prolonging the slow release effect, and meanwhile, the modified water glass and the UiO-66-(OH) 2 are compounded, so that the adsorption capacity of the adsorbent on the heterocyclic perfume is greatly increased.

The invention discloses a Pd / (HfNb series) C / TaZr composite film, Pd is loaded on the surface of the (HfNb series) C / TaZr composite film in the form of nanoparticles, the Pd nanoparticles are 5-50 nm, (HfNb series) C is obtained by carbonizing a high-entropy film formed by mixing HfNb with one or more than two of Ti, Ta and Zr, the thickness of the (HfNb series) C is 0.05-0.15 [mu] m, and the mass percentage content of Zr in TaZr is 0.5-8%; the preparation method of the composite film comprises the following steps: 1, smelting; 2, processing a TaZr foil sheet; 3, preparing a film layer on the surface of the TaZr foil and carbonizing; 4, Pd nano particles are deposited; and 5, annealing. By introducing the (HfNb system) C film layer on the surface of the TaZr film, mutual diffusion at the interface of the composite film layer is inhibited, degradation and failure of the hydrogen permeation performance of the composite film are avoided, the stability of the composite film in the hydrogen permeation process is improved, and the method is suitable for the field of hydrogen purification.