78 results about "Preferential adsorption" patented technology

The invention relates to the technical field of semiconductor micro-nano manufacturing, and discloses a novel semiconductor test probe manufacturing process which comprises the following steps: preparing an ionic liquid electrolyte containing a high-pressure priority adsorbent and a low-pressure priority adsorbent; a first voltage pulse is applied between the microelectrode and the conductive base, the amplitude of the first voltage pulse enables the high-voltage preferential adsorbent to preferentially adsorb on the surface of the microelectrode, and a flexible probe root and a flexible probe body are formed through deposition; then, a second voltage pulse is applied, and the amplitude of the second voltage pulse is lower than that of the first voltage pulse, so that the low-voltage preferential adsorbent preferentially adsorbs and deposits to form a superhard probe tip. The probe with the functional gradient structure is integrally manufactured by programmed voltage regulation and control in single continuous deposition, high hardness of the needle tip and high flexibility of the needle body are simultaneously realized on a single structure, the manufacturing process is remarkably simplified, and the cost is reduced.

The invention discloses an electrolyte used in a high cut-off voltage environment and a preparation method thereof, and relates to the technical field of battery electrolyte materials. According to the electrolyte, molecular components with electrochemical activity in anthocyanin can be specifically extracted by utilizing the extraction effect of a reference electrolyte solution, and the molecular components can be preferentially adsorbed on the surface of a high-cut-off-voltage positive electrode with negative electricity through electrostatic interaction, so that a chain decomposition reaction can be cut off, lattice oxygen can be directly anchored, and the electrochemical activity of anthocyanin is improved. Lattice oxygen release is inhibited from the source; the synergistic effect of a dual protection mechanism of'dynamic clearing-static anchoring 'is realized; moreover, the impedance of ion transmission is prevented from being increased by utilizing high-speed centrifugal treatment; the electrolyte can significantly inhibit a chain decomposition reaction in a high cut-off voltage environment, effectively avoids the formation of an over-thick or over-high impedance interface layer, ensures the capacity and cycle capacity retention ratio of the battery in the high cut-off voltage environment, and is suitable for large-scale application in lithium batteries in the high cut-off voltage environment.

This invention relates to the field of aqueous metal battery technology, specifically to an aqueous tin metal battery electrolyte containing metal sulfate additives, its preparation method, and its application. The electrolyte is based on an alkaline electrolyte (such as KOH) and soluble tin salts (such as SnSO4, SnCl2), with added metal sulfates such as Li2SO4, ZnSO4, K2SO4, MnSO4, or Na2SO4 as additives at a concentration of 0.01 mol / L to 0.5 mol / L. The metal cations preferentially adsorb onto the surface of the metal anode to form an electrostatic shielding layer, regulating metal ion deposition behavior, inhibiting the formation of "dead tin," and significantly improving the battery's cycle stability and coulombic efficiency.

This invention belongs to the field of acidic wastewater treatment technology, specifically disclosing a purification device for acidic wastewater using phosphogypsum filtration. The device includes a sedimentation tank with a baffle plate inside, a reinforcing frame fixedly connected to the outer wall of the sedimentation tank, and several drain pipes connected to one side of the lower end of the sedimentation tank. The key feature is that a filter assembly for adjusting the filtration sequence is provided on one side of the sedimentation tank. One end of the filter assembly is equipped with a feeding component for different filtration sequences. The filter assembly includes a drain pipe fixedly installed on one side of the sedimentation tank. A servo motor drives a transmission plate to rotate the filter cake 180 degrees. The process of "gypsum filter cake preferential neutralization" or "activated carbon filter cake preferential adsorption" can be switched simply by adjusting the filter cake sequence. This eliminates the need for two separate sets of equipment, directly reducing the initial cost of equipment purchase and installation, while also saving the factory space required for two sets of equipment, thus reducing the company's initial investment and site constraints.

The application discloses an intermediate processing liquid for an electroless nickel immersion gold (ENIG) production line and a chemical gold preparation method. The intermediate processing liquid is applied between the electroless nickel plating and immersion gold processes, and comprises (a) a pH buffer and a metal ion complexing agent: a total concentration of 50-150 g / L; (b) an adsorptive corrosion inhibitor: a concentration of 0.5-5.0 g / L; (c) a low-foam non-ionic surfactant: a concentration of 0.01-10 g / L; (d) an auxiliary antioxidant: a concentration of 0.5-30 g / L; (e) a dissolving agent: a concentration of 1-50 ml / L; (f) a pH regulator: an appropriate amount, which is added to maintain the pH value of the intermediate processing liquid at 4.0-6.5; and (g) deionized water: a balance, so that the concentrations of the above components reach the set target values; and the intermediate processing liquid has a design use temperature of 20-45 DEG C. The intermediate processing liquid removes residual nickel ions on the board surface and in micropores through strong complex cleaning, and blocks the pollution to the subsequent gold tank; meanwhile, the preferential adsorption of the corrosion inhibitor molecules at the nickel layer grain boundaries forms a controllable molecular-level protective film, effectively adjusts the immersion gold replacement reaction kinetics, and prevents the occurrence of intergranular corrosion (black plate).

The invention provides a corrosion inhibitor and a preparation method thereof, the corrosion inhibitor comprises an organic corrosion inhibitor and a metal salt corrosion inhibitor, the organic corrosion inhibitor comprises at least one of an organic amine compound and an organic acid salt compound, and the metal salt corrosion inhibitor comprises at least one of molybdate, titanate and zinc salt. The corrosion inhibitor provided by the invention is preferentially adsorbed on active sites on the metal surface through the chemical bonding effect of organic corrosion inhibitor molecules, so that corrosion is effectively blocked; meanwhile, the metal salt corrosion inhibitor acts with a metal matrix to form a compact protective film layer, and permeation of a corrosion medium is physically blocked. Due to the chemical and physical dual protection mechanism, the corrosion inhibitor has efficient, environment-friendly and long-acting corrosion inhibition performance on aluminum alloy, steel and the like in acid and salt mist environments.

The invention discloses a glass fiber modified polypropylene material and a preparation method thereof. The glass fiber modified polypropylene material is prepared from 52.8-94.1 parts by weight of polypropylene, 5-30 parts by weight of modified glass fiber, 0.5-6 parts by weight of maleic anhydride grafted polypropylene, 0.2-0.6 part by weight of an antioxidant and 0.2-0.6 part by weight of a light stabilizer. According to the invention, the glass fiber is subjected to surface modification in advance, the ZnO nano material is deposited on the surface of the glass fiber, and due to the selected synthesis conditions, a round crystal in the shape of a spiral cover in the middle can grow on the surface of the glass fiber. Citrate can replace O < 2-> to be preferentially adsorbed on the (0001) surface and is bonded with Zn < 2 + > through-COO <-> and-OH groups, so that the lt of a ZnO crystal is inhibited; 001gt, 001gt; each layer is composed of ZnO small lamellar crystals, and the ZnO small lamellar crystals grow along the direction of the ZnO small lamellar crystals. The glass fiber is modified, the surface of the glass fiber is coated with a layer of ZnO crystals, the ZnO crystals play a role of a rivet in the later blending modification process of the glass fiber and PP, and the glass fiber reinforced polypropylene material with higher mechanical properties is obtained.

The application discloses a kind of high charge coagulant aid synergic PAC's power plant raw water processing method, belong to water treatment technical field.To solve the charge neutralization capacity of existing separate PAC process insufficient, large reagent consumption, effluent aluminum residual risk higher problem, the application simultaneously adds the organic coagulant aid with PAC reagent in raw water, and the charge density of organic coagulant aid is higher than PAC;Organic coagulant aid is preferentially adsorbed on the surface of negatively charged colloidal particles to realize rapid charge neutralization and destabilization, and then combined with PAC to form dense alum flower, significantly reducing PAC demand.The system uses "flow rate proportional feedforward + turbidity feedback" algorithm to automatically adjust the dosage, and controls the proportion by seasons, which can reduce PAC consumption by more than 60%, the turbidity of produced water is stable below 0.6NTU, significantly reducing the operation cost and aluminum residual risk, ensuring the safety of subsequent system, and the alum flower settles quickly, and the effluent water quality is stable and excellent.

The invention relates to the technical field of waste gas treatment equipment, and discloses waste gas purification equipment for a PE pipe production line, the waste gas purification equipment comprises a zeolite rotating wheel, the zeolite rotating wheel comprises a front cylinder and a rear cylinder, the front cylinder and the rear cylinder are internally and movably connected with a front rotating wheel and a rear rotating wheel which keep rotating respectively, and a separation cavity is formed between the rear rotating wheel and the front rotating wheel; a front adsorption cavity, a front desorption cavity and a front cooling cavity are arranged between the front barrel and the separation cavity, a rear adsorption cavity, a rear desorption cavity and a rear cooling cavity are arranged between the separation cavity and the rear barrel, the front adsorption cavity and the rear adsorption cavity are connected in series, and the end part of the front adsorption cavity is communicated with waste gas through an adsorption pipe. According to the waste gas purification equipment for the PE pipe production line, a tandem type double-rotating-wheel structure is adopted, high-boiling-point pollutants are preferentially adsorbed and borne through the front rotating wheel, and adjustable internal reflux and differential rotating speed design are matched, so that the problem of zeolite pore channel blockage is solved, meanwhile, the concentration multiple of low-concentration waste gas is greatly increased, and the service life of the waste gas is prolonged. And stable self-heating operation of the catalytic oxidation furnace is ensured.

The application discloses a scandium-based MOF crystal material, a preparation method and application thereof. The MOF crystal is formed by [Sc3(mu2-OH)3(CO2)4O6] n The three-dimensional porous framework structure is formed by the mutual connection of an inorganic metal chain, 2,5-thiophene dicarboxylic acid and a nitrate ion, is directly synthesized by a solvothermal reaction with a metal Sc based on the ligand 2,5-thiophene dicarboxylic acid, and has relatively mild, simple and easy reaction conditions. The MOF crystal has high crystallinity, excellent thermal stability, water stability, solvent stability and wide pH stability. Under normal temperature and pressure, C3H6 is preferentially adsorbed, then C2H6, and finally C2H4, and the MOF crystal has good C3H6 / C2H4 and C2H6 / C2H4 separation performance, thereby obtaining high-purity C2H4 and recovering C3H6, and can be applied to the effective separation of C2H4 and C3H6 in a methanol-to-olefin (MTO) mixture.

The invention provides an Ag / Sr-MFI molecular sieve adsorbent as well as a preparation method and application thereof in methane purification, and belongs to the technical field of molecular sieve adsorbents. The preparation method comprises the following steps: putting MFI configuration molecular sieve raw powder into a metal cation solution, carrying out metal cation exchange to obtain Ag / Sr-MFI molecular sieve raw powder, and carrying out molding, chambering and roasting to obtain the high-nitrogen-selectivity Ag / Sr-MFI adsorbent. According to the invention, original cations (Na < + >) in the MFI molecular sieve are exchanged into Sr < 2 + > and Ag < + >, and the strong adsorption effect of the Sr < 2 + > on N2 molecules with relatively large dipole moment in a cross pore channel and a pore channel bending part and the strong complexation effect of a small amount of Ag < + > and N2 are utilized to realize the separation of methane / nitrogen and preferential adsorption of nitrogen, so that the separation efficiency of methane / nitrogen is improved. Meanwhile, the catalyst has high nitrogen adsorption capacity and high nitrogen / methane separation selectivity, and can be used for efficiently purifying methane.

This invention discloses a carbon monoxide sensor and its filter preparation method. The filter comprises an activated carbon cloth layer and a thin film layer formed by slurry printing; the slurry contains, by mass, 20-60 parts of metal oxide, 5-10 parts of binder, 8-15 parts of dispersant, 40-80 parts of carrier, and 50-80 parts of solvent. In the preparation process, the metal oxide and dispersant are first mixed in ultrapure water, dried at 135°C, and crushed. Then, the mixture is ball-milled with the binder, carrier, and solvent to obtain the slurry. Finally, the slurry is printed onto a breathable substrate using a steel mesh or screen printing process to form a film. This sensor utilizes the activated carbon cloth to preferentially adsorb most organic vapors. Simultaneously, the metal oxide, after modification with the dispersant, has increased surface active sites, which can further catalyze the oxidation or chemical adsorption of residual organic vapors, effectively suppressing their poisoning or cross-interference on the electrochemical electrode. The printed thin film is dense and uniform, and combined with the ball milling composite process, it significantly improves the resistance to organic vapor interference, ensuring the selectivity and long-term stability of CO detection.

The invention relates to the technical field of desulfurizing agents, in particular to an efficient purification fine desulfurizing agent and a preparation method thereof, and the efficient purification fine desulfurizing agent comprises the following raw materials: silver nitrate, rare earth cerium-zinc composite oxide, a copper / gamma-aluminum oxide desulfurizing agent, potassium carbonate, ammonium bicarbonate and sodium carboxymethyl cellulose. The rare earth cerium-zinc composite oxide can preferentially adsorb and concentrate various sulfides in gas through the huge specific surface area of the rare earth cerium-zinc composite oxide, and especially part of organic sulfur (such as COS) which is difficult to directly remove is preliminarily activated or converted by utilizing the excellent catalytic oxidation capacity of cerium; the copper / gamma-aluminum oxide desulfurizer fixes copper species through surface chemical coordination, and can be subjected to efficient and irreversible chemical reaction with hydrogen sulfide and activated organic sulfur to generate stable metal sulfide, so that thorough removal of sulfur is realized; the integral desulfurization precision and the sulfur capacity are remarkably improved through the functional linkage.

This application belongs to the field of batteries and discloses a secondary battery. The secondary battery includes a negative electrode and an electrolyte. The negative electrode includes a silicon-based material containing nitrogen, with a nitrogen content A% satisfying 0.05 ≤ A ≤ 4.8. The electrolyte includes a compound of formula (I), with a mass content B% satisfying 0.01 ≤ B ≤ 6. This application combines an appropriate amount of nitrogen-containing silicon-based material with an electrolyte containing the compound of formula (I). This allows for the utilization of the high specific capacity advantage of silicon-based materials while improving the electron and lithium-ion transport rate in the negative electrode, preventing negative electrode cracking and pulverization. The nitrogen-containing silicon-based material preferentially adsorbs the compound of formula (I) and promotes its reduction and ring-opening, forming a stable organic-inorganic composite SEI film with high ionic conductivity. This synergistically optimizes interfacial lithium-ion transport, suppresses interfacial side reactions and impedance increases at high rates, and thus improves the battery's rate performance and cycle stability. Formula (I)

The invention discloses a method for preparing a carbon molecular sieve by utilizing biomass waste and application of the carbon molecular sieve in realizing C4 olefin and nitrogen-oxygen separation. The method comprises the following steps: (1) adding the biomass waste into water for soaking; (2) treating the biomass carbon source in the step (1) with boric acid to obtain a boron-containing biomass precursor; and (3) carrying out pyrolysis carbonization treatment on the boron-containing biomass precursor to obtain a boron-modified carbon molecular sieve, or adding a potassium permanganate solid into distilled water, stirring, and adding the boron-modified carbon molecular sieve to obtain the carbon molecular sieve. According to the invention, efficient conversion and utilization of biomass waste are realized, and the prepared carbon molecular sieve shows the preferential adsorption characteristic to oxygen and butadiene, and has high adsorption capacity and excellent selectivity. The method has the advantages of high efficiency, low cost, environmental protection and good operability, and shows a wide application prospect in the fields of air separation and C4 olefin adsorption separation.

The utility model discloses a wastewater heavy metal treatment device with a magnetic adsorption function, which comprises a main box body, a liquid inlet hopper communicated with the inner side of the main box body is fixedly connected above the main box body, and the inner side of the main box body is fixedly connected with a partition plate; according to the utility model, through the preposed design of the magnetic impurity screening mechanism, magnetic metal impurities in wastewater are preferentially adsorbed to the outer conveying belt, automatic falling and recovery of metal are realized by utilizing the non-magnetic supporting roller, the metal separation efficiency is remarkably improved, residual non-magnetic impurities are secondarily intercepted by the filter screen drawer, the impurities are staged, the effluent quality is guaranteed, and the production cost is reduced. The anti-blocking scrubbing brush is matched with the long threaded rod for linkage, the surface of the filter screen can be automatically scraped in a reciprocating mode, the filter screen blocking problem is effectively solved, the manual cleaning frequency is reduced, continuous and stable operation of the device is ensured, the filter screen drawer is of a detachable structure, and filter screens of different mesh numbers are supported to be rapidly replaced.

The invention discloses a preparation method of an ultrahigh-strength steel member with fatigue impact resistance, which successfully realizes organic unification of ultralow roughness, high steady-state gradient compressive stress and high uniform surface energy on the surface of ultrahigh-strength steel through full-chain coordinated regulation and control. The constructed residual stress field is generated in situ by a self-generated heat-force coupling process induced by laser irradiation no longer depending on external plastic deformation, and is cured into a thermodynamic metastable state through a subsequent multi-field synergistic effect, so that the retention capability of the residual stress field in a service temperature change environment is remarkably improved; meanwhile, by means of oriented reconstruction of a molecular-scale surface energy field, anisotropy of surface free energy is eliminated, the preferential adsorption and electrochemical activation tendency of an environmental medium in a stress concentration area is restrained, and the component can present consistent and predictable energy dissipation behaviors when bearing impact loads for the first time; and the fatigue performance stability and the long-term service reliability are fundamentally improved.

The invention discloses catalyst slurry for a high-temperature proton exchange membrane fuel cell (HT-PEMFC) as well as a preparation method and application thereof, and aims to solve the problem that phosphoric acid (PA) in the conventional HT-PEMFC is separated out from a proton exchange membrane and poisons Pt active sites of a catalyst layer, so that the performance of the cell is reduced. The catalyst comprises a carbon carrier, Pt nanoparticles loaded on the carbon carrier and a metal oxide coating the surfaces of the Pt nanoparticles, the catalyst slurry is composed of the catalyst, water, an alcohol dispersant and a long-chain polybenzimidazole (OPBI) binder with the EW greater than or equal to 106, and the catalyst slurry is prepared by compounding the components according to a specific mass ratio and carrying out multi-step ultrasonic dispersion. The slurry is sprayed on carbon paper, the slurry and a high-temperature proton exchange membrane are subjected to hot-pressing assembly to form a membrane electrode assembly (MEA), Lewis acid sites on the surface of the metal oxide can preferentially adsorb phosphate ions and protect Pt active sites, the oxygen reduction reaction (ORR) activity of a cathode is remarkably improved, proton impedance (1.06-1.15 ohm cm < 2 >) is reduced, the electrochemical active area (87-96 m < 2 > / g) is increased, the service life of a battery is prolonged, and the service life of the battery is prolonged. And the preparation process is simple and easy for industrial production.

The invention provides a catalyst for electrooxidation of chlorine-containing electrolyte and a preparation method and application thereof, the catalyst comprises a layered double hydroxide-rare earth basic carbonate heterojunction grown on a nickel substrate in situ, and the nickel substrate is foamed nickel with the surface modified by nickel. On the basis of a strategy for constructing selective adsorption sites capable of distinguishing Cl <-> and OH <->, preferential adsorption of OH <-> is realized by introducing rare earth basic carbonate (RE (OH) CO3), so that the chloride ion corrosion resistance of the material in seawater electrolysis is remarkably enhanced. The heterostructure not only has oxygen evolution reaction activity superior to that of traditional LDH, but also shows excellent structural stability and continuous corrosion resistance under the industrial-grade current density, and a feasible material solution is provided for promoting industrial application of a seawater electrolysis technology.

The invention discloses a method for separating benzene, cyclohexene and cyclohexane, which comprises the following steps of: selectively adsorbing a binary / ternary mixture of benzene, cyclohexene and cyclohexane by adopting a Q [7] powder material according to the sequence of preferentially adsorbing benzene, cyclohexene and cyclohexane; the binary / ternary mixture is adsorbed on the surface of the Q [7] powder material, so that the separation of benzene, cyclohexene and cyclohexane is realized, and the Q [7] powder material with the binary / ternary mixture adsorbed on the surface can be recycled. The separation process is simple to operate and low in equipment requirement; rectification operation is not needed in the separation process, energy consumption is low, energy is saved, and the production cost of benzene, cyclohexene and cyclohexane is reduced; the Q [7] powder material is high in stability and can be recycled, and the separation effect cannot be reduced.

This utility model discloses a carbon dioxide drying and dehydration device, including a base plate. Four support columns are fixedly connected to the outer surface of the base plate. A processing shell is fixedly connected to the top of each of the four support columns. A mounting plate is fixedly connected to the outer surface of two of the support columns. A regeneration mechanism is provided inside the processing shell and on the outer surface of the mounting plate. Two conduits are fixedly connected to the outer surface of the processing shell. This device utilizes a cyclone separator and a condenser to remove free water and large particulate impurities from carbon dioxide. A modified molecular sieve plate preferentially adsorbs polar water, while a highly active silica gel plate adsorbs residual trace amounts of water. The hydrophobic coating inside the adsorbent particle plate reduces false saturation caused by contact between carbon dioxide and the adsorbent surface, extending the single adsorption cycle. Nitrogen gas generated by a nitrogen generator carries the desorbed water into a discharge pipe, from which it is discharged from the processing shell.

This invention belongs to the field of natural gas hydrate inhibition, specifically relating to an arylimine-type natural gas hydrate inhibitor, its preparation method, and its application. The technical solution of this invention is as follows: An arylimine-type natural gas hydrate inhibitor is prepared using chitosan, 3-chloro-2-hydroxypropyltrimethylammonium chloride, and aromatic aldehydes as raw materials. This invention utilizes the excellent green biodegradability of chitosan by introducing cationic surfactants and aromatic aldehydes to modify chitosan, disrupting the original cage-like ordered structure of water molecules required for hydrate formation. Simultaneously, the amino groups inherent in chitosan can preferentially adsorb onto the surface of hydrate crystal nuclei, hindering hydrate growth. This further improves the hydrate inhibition effect while retaining the excellent green biodegradability of chitosan itself, solving the problems of poor degradability, low inhibition effect, and high cost of current hydrate inhibitors.

The application discloses a gradient ion adsorption mixing method of high-tungsten-based multi-element alloy powder and a core-shell structure powder. In view of the problems of mixing segregation (CV>15%), rare earth oxidation (>1200ppm) and interface brittleness, a three-step method is adopted: 1. surface hydroxylation: H2O230vol%+HNO3 etching makes the tungsten powder hydrophilic (contact angle≤10°); 2. pH gradient adsorption: step-by-step pH control (pH 3.0-4.0 preferentially adsorbs rare earths→pH 6.0-8.0 adsorbs light metals); 3. in-situ reduction: gradient heating in a hydrogen-argon mixed atmosphere to generate a core-shell structure. The obtained powder has a coating rate of ≥95% (SEM-EDS), an oxygen content of ≤800ppm (ASTM E1019) and a W / Al distribution CV value of ≤4.2% (GB / T 5060). The powder is suitable for high-end fields such as military or aerospace.

The invention discloses a method for recycling high-purity scandium by separating scandium and zirconium in a hydrochloric acid system, and belongs to the technical field of strategic metal separation and purification. Epoxy weak-base anion exchange resin is adopted as an adsorbent, scandium is preferentially adsorbed by utilizing the specific coordination effect of functional groups on the resin and scandium ions, and the scandium is recycled; and efficient separation of scandium and zirconium is realized through selective desorption of an eluent sodium chloride solution. According to the method, high-selectivity separation of the alkalescent epoxy anion exchange resin is utilized, efficient separation of Sc (III) and Zr (IV) is achieved under the weak acid condition, the limitation that a traditional adsorbent is insufficient in selectivity is remarkably broken through, the method has the advantages of being low in operation cost, high in separation efficiency and green in process, a subversive solution is provided for large-scale purification of strategic metal scandium, and the method is suitable for industrial production. The method is of great significance to guarantee the security of national defense and high-tech industrial resources.

This invention discloses a high-hardness, high-purity cyanide-free electroforming gold solution, its preparation method, and its application, belonging to the fields of electrochemical deposition and jewelry manufacturing technology. The high-hardness, high-purity cyanide-free electroforming gold solution comprises: sodium gold sulfite (calculated as gold) 10-14 g / L, sodium sulfite 100-130 g / L, ethylenediamine sulfate 22-33 g / L, potassium citrate 25-35 g / L, and trace rare earth element additives 0.5-2 mg / L, with a pH value of 7.2-7.6. This invention refines grain size by introducing pre-complexed trace rare earth element additives, utilizing the difference in atomic radius to generate a pinning effect at grain boundaries; it also utilizes the preferential adsorption of sodium 3-mercapto-1-propanesulfonate at microscopic peaks to generate local polarization differences to fill microscopic valleys; and it reduces the internal crystallization stress of the electroformed layer by constructing a composite complex system of sodium sulfite, ethylenediamine sulfate, and DTPA.

The application relates to a preparation method of a novel microporous copper-based metal organic framework material (Cu-MOF) and gas separation application thereof. Cu metal centers are all in a four-coordination mode, each independent Cu atom is coordinated with one oxygen atom on a BODC ligand, carboxyl O atoms on the BODC ligand all participate in coordination, and a propeller binuclear coordination geometry of the Cu-MOF is formed; wherein each BODC ligand acts as a four-connected node and is connected with four crystallographically independent Cu centers, and the carboxyl on the BODC ligand is connected and supported, and the bridge ring in the middle section contains rich methylene groups, and the rich H atoms can all act as potential action sites. The regularly arranged BODC ligands in the Cu-MOF channel provide hydrogen bond acceptors, which are favorable for strengthening the action force between low-carbon hydrocarbon gas molecules and the framework, so that the effects of preferentially adsorbing acetylene, ethane, propylene, propyne and sulfur hexafluoride gas in acetylene / carbon dioxide, ethane / ethylene, propylene / ethylene, propyne / propylene, sulfur hexafluoride / nitrogen and other mixed gases are realized.

The invention discloses an aqueous zinc ion battery electrolyte, a preparation method and an aqueous zinc ion battery thereof, and belongs to the technical field of aqueous zinc ion batteries. The aqueous zinc ion battery electrolyte comprises deionized water, soluble zinc salt and an additive ammonium tartrate. Tartaric acid anions can be preferentially adsorbed on the surface of zinc to drive ammonium radicals to form a double-layer structure so as to block contact between zinc and water. In addition, anions and cations form an acid-base buffer pair, the pH of the electrolyte can be adjusted, meanwhile, a zinc ion solvation structure is optimized, and a stable hydrogen bond network is constructed to maintain the stability of the electrolyte. Therefore, when the aqueous zinc ion battery electrolyte is applied to a battery, a dendritic crystal phenomenon caused by hydrogen evolution, corrosion and non-uniform zinc ion deposition of a zinc negative electrode in the electrolyte can be effectively inhibited, the cycle life of the battery is prolonged, and the coulombic efficiency and the high-temperature stability of the battery are improved.

This invention discloses a MOF-type molecular sieve adsorbent, its preparation method, and its applications, belonging to the field of adsorbent material technology. The raw materials used in the synthesis of the MOF-type molecular sieve adsorbent prepared by this invention are relatively inexpensive, and the trifluoromethyl functional group can act as a constituent unit to regulate the pore size of the MOF material. The channel size in the crystal structure of the MOF-type molecular sieve adsorbent lies between the molecular dynamics sizes of perfluoropropylene and perfluoropropane, providing a structural basis for the adsorption and separation process of sieving perfluoropropylene from perfluoropropane. Furthermore, the presence of hydrogen bonding sites within the channels and the restriction of the pore size by the trifluoromethyl functional group facilitates the entry of perfluoropropylene molecules with smaller dynamic sizes, and strengthens the interaction between perfluoropropylene gas molecules and the framework. This achieves preferential adsorption of perfluoropropylene gas from the perfluoropropylene / perfluoropropane mixture, purifying the perfluoropropane component in the mixture and reducing the energy consumption of the separation process.

The invention discloses a cerium modified ZIF-8 / wood composite material for selectively adsorbing VOCs as well as a preparation method and application of the cerium modified ZIF-8 / wood composite material, and belongs to the technical field of functional composite materials. According to the composite material, pretreated wood serves as a three-dimensional carrier, ZIF-8 nanoparticles formed by coordination of zinc ions, cerium ions and 2-methylimidazole are loaded through an in-situ growth method, and the molar ratio of zinc to cerium is 3: 1-6: 1. The preparation method comprises the following steps: wood alkali pretreatment, zinc ion adsorption, in-situ coordination reaction with a solution containing cerium and a ligand, and post-treatment. The pore channels and surface properties of ZIF-8 are effectively regulated and controlled through cerium doping, so that the composite material has high adsorption capacity and excellent selectivity on benzene, methylbenzene, xylene and formaldehyde, and especially can preferentially adsorb benzene; meanwhile, the material is of a block structure capable of being directly applied, the engineering problem of MOF powder is solved, the material is suitable for the fields of furniture manufacturing and air purification, and a new scheme is provided for VOCs source treatment.