160 results about "Preferential adsorption" patented technology

The present invention provides an ultrathin polyethylene oxide-based carbon capture film, and a preparation method therefor and the use thereof. The ultrathin polyethylene oxide-based carbon capture film is of a three-layer composite structure, successively comprising a polyethylene oxide-based separation layer having a strong CO2 affinity, a modified interface modification layer and a support layer from top to bottom. The separation layer is prepared by carrying out cross-linking reaction of PEO and a silicone rubber monomer, and thus contains a large number of ether oxygen groups preferentially adsorbing CO2, and, by means of the introduction of a silicone rubber chain segment, overcomes the structural defects of high cohesive energy and low permeability of pure PEO films, thus achieving high gas molecule permeability. Aiming at the problem of poor compatibility between the interface modification layer and the separation layer, the surface properties of the interface modification layer are improved by utilizing a simple and controllable UV / O3 treatment method which is easy to scale up, thus achieving uniform and defect-free coating of the ultrathin separation layer. The present invention involves a simple preparation process, can easily realize scale-up preparation, and achieve excellent carbon capture performance.

The invention discloses an aqueous zinc ion battery electrolyte as well as a preparation method and application thereof, and belongs to the technical field of zinc ion batteries. The vanadic acid additive takes a Zn-sulfonated hydrogen bond organic framework as a carrier, and 4-6wt% of vanadate is loaded on the surface of the carrier. Sulfonic acid groups contained in the carrier can cooperate with vanadate to preferentially adsorb free water molecules in an aqueous electrolyte, the erosion activity of the water molecules on the positive electrode material is reduced, a hydrogen bond network structure of the hydrogen bond organic framework can selectively intercept active water molecules, and the water molecules are prevented from participating in oxidation reduction dissolution of the vanadium-based positive electrode material. Meanwhile, the zinc metal ions doped in the carrier can cooperate with the strong polarity of the sulfonic group, regulate and control the solvation structure, reduce the interface impedance and inhibit the growth of zinc dendrites, so that the long-term stability of the aqueous zinc ion battery is improved, and the aqueous zinc ion battery electrolyte capable of inhibiting the dissolution of a positive electrode and stabilizing a zinc negative electrode is obtained.

The invention discloses a full-automatic condensation water collection system and method in desert, and the system comprises an environment pretreatment layer: a bionic honeycomb filter screen is combined with an electrostatic adsorption technology to filter sand and dust, a spiral pre-cooling channel is used for pre-cooling, and back flushing cleaning is automatically started every 2 hours to maintain the performance of the filter screen; in the energy supply layer, the optimal combination of photovoltaic-wind energy-heat energy three-mode power generation is dynamically calculated through an AI algorithm; photovoltaic power supply is preferentially used in the daytime, and residual energy is stored in the nitrate phase change energy storage material; wind power generation is started when the wind speed is high at night, and phase-change energy storage is used for complementing when the wind speed is insufficient; condensing the core layer: when the environment humidity is relatively high, the modified MOF material preferentially adsorbs water vapor, and switching to a condensation mode every 4 hours; the thermoelectric refrigeration sheet is started to trigger phase change condensation; the intelligent control layer is used for collecting data through a sensor, predicting future environmental parameters through an LSTM neural network and adjusting condensation power in advance; and fault early warning is carried out by combining vibration analysis and temperature gradient detection.

The invention discloses a low-concentration ether electrolyte adaptive to a high-voltage high-nickel ternary lithium ion battery, a preparation method of the low-concentration ether electrolyte and the lithium ion battery, and relates to the technical field of batteries. The ether electrolyte comprises a solvent and a solute; the solvent comprises an ether solvent, and is specifically at least one of 4-cyano tetrahydropyran, 2-(tetrahydro-2H-pyran-4-yl) acetonitrile, 2-methoxyacetonitrile, 2-ethyoxyl acetonitrile, 3-methoxypropionitrile, 3-ethyoxyl propionitrile, 3-butoxyl propionitrile, ethylene glycol bis (propionitrile) ether and 3-{2-[2-(2-cyano ethyoxyl) ethyoxyl] ethyoxyl} propionitrile. The ether solvent contains cyano groups, the strong electronegativity of the cyano groups enables the cyano groups to be coordinated with transition metal ions in the ternary material, and the cyano groups are preferentially adsorbed at the interface of the positive electrode material, so that the arrangement of solvent molecules at the interface has directivity, the proportion of ether oxygen bonds and carbon hydrogen atoms in double electric layers is reduced, and the performance of the positive electrode material is improved. And the sites which are easy to generate dehydrogenation reaction in the molecules are far away from the high-voltage positive electrode interface which is easy to generate oxidation reaction.

The invention discloses a KAUST-7-NH2 / PIM-1 mixed matrix membrane as well as a preparation method and application of the KAUST-7-NH2 / PIM-1 mixed matrix membrane. The mixed matrix membrane comprises a self-polymerized microporous polymer (PIM-1) and amino modified KAUST-7 (KAUST-7-NH2) filled in the matrix membrane. The KAUST-7-NH2 is filled into the PIM-1 solution to prepare a membrane casting solution, and the membrane casting solution is dried by a solution evaporation method to form the membrane. According to the present invention, the compatibility between KAUST-7-NH2 and PIM-1 is improved by introducing the amino group, the mechanical property of the membrane is significantly improved, the exposure of a large amount of CO2 adsorption active sites is promoted, the preferential adsorption of CO2 is enhanced, the CO2 permeability of the mixed matrix membrane is enhanced, and the CO2 / CH4 selectivity (PCO2 gt, 3219 Barrer, alphaCO2 / CH4 gt, 32.1) is improved; the preparation method provided by the invention is simple and easy to operate, and the prepared KAUST-7-NH2 / PIM-1 mixed matrix membrane has higher gas separation performance on the basis of excellent aging resistance and plasticizing resistance, and can be applied to efficient separation of CO2 / CH4.

The invention discloses a Cu-MOF / chitosan / tannic acid composite adsorbent and a preparation method and application thereof to uranium adsorption, and relates to the technical field of uranium-containing wastewater treatment.The preparation method comprises the steps that a certain amount of deionized water is added into a proper amount of tannic acid, stirring is conducted till the deionized water is completely dissolved, then a proper amount of chitosan, Cu-MOF and glacial acetic acid are added, stirring continues, then a proper amount of glutaraldehyde solution is added, stirring is conducted continuously, and the Cu-MOF / tannic acid composite adsorbent is obtained. And after oscillation and freeze drying, the Cu-MOF / chitosan / tannic acid composite adsorbent is obtained. The composite adsorbent prepared by the invention shows an extremely high uranium removal rate in uranium-containing wastewater treatment, and the uranium removal rate can reach 100%. Meanwhile, a competitive adsorption experiment shows that the composite adsorbent disclosed by the invention has excellent selectivity on uranium and can preferentially adsorb uranium ions even in a complex water environment, so that the efficiency and selectivity of treating uranium-containing wastewater are improved.

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 a current collector active material and a preparation method and application thereof, and relates to the technical field of electrochemical energy storage. Comprising the following steps: dissolving acid, a niobium precursor and aniline in water to form a solution A; dissolving ammonium persulfate in water to form a solution B, adding the solution B into the solution A, uniformly mixing, standing for reaction, carrying out suction filtration and drying to obtain niobium-doped polyaniline carbon nanotubes, and carrying out heat treatment on the niobium-doped polyaniline carbon nanotubes in a protective atmosphere to obtain amorphous carbon nanotubes embedded with niobium pentoxide nanoparticles. The method can be used for preparing a negative-electrode-free sodium metal battery current collector and a negative-electrode-free sodium metal battery. According to the method, hectogram or even kilogram-level superfine amorphous carbon nanotubes embedded with niobium pentoxide nanoparticles can be prepared in a single batch in a macroscopic manner, and Nb2O5 nanoparticles anchored in the carbon tubes are subjected to reversible intercalation pseudocapacitance reaction, so that the sodium ion migration rate is remarkably increased, sodium ions are preferentially adsorbed, the nucleation overpotential is greatly reduced, and the performance of the carbon nanotubes is improved. And the assembled negative-electrode-free sodium metal total battery shows an extremely high capacity retention ratio.

The invention provides a preparation method and application of an anti-caking agent for betaine, and the preparation method comprises the following steps: step 1, uniformly mixing metered calcium silicate, stearic acid and water to obtain a first treated substance; step 2, performing ball milling on the first treated object in a ball mill to obtain a second treated object; and 3, carrying out suction filtration on the second treated substance, and drying to obtain the target anti-caking agent. The calcium silicate and the stearic acid are compounded, so that the porous structure of the calcium silicate preferentially adsorbs environmental moisture and reduces water films on the surfaces of betaine particles, the hydrophobicity of the stearic acid forms a hydrophobic layer through coating and chemical reaction, the moisture is further isolated, adhesion among the particles is reduced, and the caking rate of the betaine is reduced. Low-cost raw materials such as calcium silicate and stearic acid are used, and simple process steps such as mixing, ball milling, suction filtration and drying are adopted in the preparation process, so that the preparation cost of the anti-caking agent is reduced while the preparation process is simplified. In addition, the whole preparation process is environment-friendly, less in wastewater discharge and free of waste residue discharge.

The invention provides a zinc metal self-repairing high-performance fibrous flexible aqueous zinc battery and a preparation method thereof, the battery comprises a positive electrode, a zinc negative electrode and a hydrogel electrolyte, the positive electrode and the zinc negative electrode are in a flexible fibrous shape, and the zinc negative electrode is spirally wound outside the positive electrode; the hydrogel electrolyte contains an adsorption type additive, and at least part of the hydrogel electrolyte is arranged between the positive electrode and the zinc negative electrode. The one-dimensional fibrous battery provided by the invention is suitable for weaving and manufacturing wearable electronic fabrics, the flexible fibrous positive electrode and the flexible fibrous zinc negative electrode have good deformation freedom and bending performance, and the hydrogel electrolyte containing the adsorption type additive can be preferentially adsorbed on the surface of the zinc negative electrode when the zinc negative electrode is bent to generate mechanical cracks, so that the mechanical cracks are prevented from being generated. The molecular concentration field distribution and Helmholtz layer components on the surface are changed, and the surface defects are repaired in real time, so that zinc ions are uniformly deposited on the surface of the zinc negative electrode, the formation of dendritic crystals is inhibited, and the cycle performance of the battery is improved.

The invention belongs to the technical field of harmful gas pollution control, and provides a defective titanium-based metal organic framework material, a preparation method and application thereof, a method for photocatalytic degradation of formaldehyde and a coating compound. In the preparation process, a new strategy of TiO2 (at) NMX structure defect characteristics is successfully created by introducing an acetic acid modifier and adopting a non-thermal plasma assisted synthesis strategy, and the method is used for efficiently and stably photo-catalytically oxidizing formaldehyde. Through coordination unsaturation of oxygen vacancies, a large number of dangling bonds are provided for preferential adsorption of reactants. Meanwhile, oxygen vacancies can accelerate electron migration and inhibit recombination of photo-induced electrons and holes, and finally the photocatalytic degradation activity of the defect type titanium-based metal organic framework material is further improved. The data of the embodiment shows that the degradation efficiency of the defect type titanium-based metal organic framework material for photocatalytic degradation of formaldehyde for 120 minutes is 64.76-95.27%.

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 relates to the technical field of sewage treatment, and discloses an industrial sewage integrated treatment device which comprises a treatment tank, a motor is fixedly connected to the top of the treatment tank, a water inlet pipe fixedly communicates with the inner wall of the treatment tank, a water outlet pipe fixedly communicates with the bottom of the treatment tank, and a rotating shaft is fixedly connected to the output end of the motor. The circumferential surface of the rotating shaft is fixedly connected with a triangular frame, the inner wall of the triangular frame is fixedly connected with an adsorption plate, and the front part of the triangular frame is fixedly connected with a fixed plate I. When sewage treatment is carried out, the triangular frame rotates to drive the adsorption plate to rotate, so that impurities in water can be adsorbed; according to the device, fine impurities in water are preferentially adsorbed, heavy metal particles in sewage are treated in advance, and the situation that the heavy metal particles are accumulated in soil during discharging, and a soil ecological system and crops are damaged is avoided.

The present invention relates to the field of water treatment, and in particular to a method for controlling halogenated disinfection byproducts in water with high efficiency and low energy consumption. The present invention provides a method for preparing rice straw biochar using renewable resource plant straw as raw material, and the rice straw biochar can efficiently adsorb organic macromolecules such as macromolecular organic matter HA in water. The present invention also provides a method for reducing halogenated disinfection byproducts in water, first using the rice straw biochar to preferentially adsorb NOM macromolecules, and then using activated carbon for further adsorption after disinfection with a chlorine-containing disinfectant, giving full play to the respective advantages of two different carbon materials, not only improving the removal efficiency of halogenated disinfection byproducts and their precursors, but also achieving the safety of drinking water, and having significant effects of energy saving and environmental protection.

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 relates to the technical field of food processing, and discloses fatty acid balanced and homogenized emulsified grease and a preparation method thereof.The emulsified grease is oil-in-water type nano-emulsion and comprises an oily component and a water component which are composed of DHA source grease, ALA source grease, MUFA source grease and medium chain triglyceride according to a specific proportion, the preparation method comprises the following steps: preparing an oily component and a water-based component, carrying out high-shear pre-emulsification, carrying out interface self-optimization treatment, and carrying out high-shear pre-emulsification on the oily component and the water-based component according to the trend that a system is converted to a lower interface free energy state. And the pH response type antioxidant amphiphilic molecule which is more stable in thermodynamics can replace the surfactant which is preferentially adsorbed in dynamics in the pre-emulsification stage. By combining the structure of the amphiphilic molecule with an interface self-optimization process and cooperating with other antioxidants in the oil phase and the water phase, the physical stability and oxidation stability of an emulsion system rich in unsaturated fatty acid are remarkably improved.

The invention belongs to the technical field of gas adsorption separation, and particularly relates to a cobalt-based metal organic framework material, a preparation method thereof and application of the cobalt-based metal organic framework material in propylene-ethylene separation. The cobalt-based metal organic framework material provided by the invention can preferentially adsorb propylene in a mixture of propylene and ethylene, separation can be carried out at normal temperature and normal pressure, and the cobalt-based metal organic framework material has relatively low energy consumption and good safety, so that the economic benefit and the energy efficiency are improved to the maximum extent. The cobalt-based metal organic framework material provided by the invention has a relatively high specific surface area, can show a relatively high selective separation effect on propylene-ethylene mixed gas separation at normal temperature and normal pressure, and has a good application prospect. The cobalt-based metal organic framework material provided by the invention can selectively adsorb propylene and is suitable for separating propylene from ethylene.

The invention discloses an inorganic fluorine-containing anion functionalized microporous material, a preparation method thereof and application of the inorganic fluorine-containing anion functionalized microporous material in carbon dioxide adsorption and selective adsorption separation of olefin / alkane. The microporous material is a polymer formed by coordination of a metal ion M, an inorganic fluorine-containing anion A and an azole organic ligand L through a solvothermal reaction, and the solvothermal reaction adopts a rotary oven or a microwave reaction. The metal ion M is selected from at least one of Zn < 2 + >, Ni < 2 + > and Cu < 2 + >. The inorganic fluorine-containing anion A is selected from at least one of SiF6 < 2->, GeF6 < 2->, TiF6 < 2->, NbOF5 < 2->, SnF6 < 2-> and ZrF6 < 2->. The microporous material has a proper aperture size # imgabs0 # and rich fluorine-containing anions and nitrogen azole adsorption sites, and by taking the microporous material as an adsorbent, the selective adsorption separation of ethylene / ethane can be realized, alkane is preferentially adsorbed under a low-pressure condition, and a certain trapping capability on carbon dioxide is realized.

The present invention provides a method for preparing a PDMS-based pervaporation membrane with a continuous intermediate layer. First, a TA-APTES@ODS intermediate layer is prepared, and then a metal source is uniformly dispersed in a PDMS polymer and spin-coated onto the membrane surface. MOFs nanoparticles are formed in situ by chemical vapor deposition, and finally a hydrophobic silane coupling agent is coated on the membrane surface to improve the performance of the membrane. The prepared intermediate layer optimizes the surface structure and performance of the base membrane, prevents the pore permeation effect of PDMS, and promotes the dense formation of the PDMS selective layer. The metal source uniformly distributed in the PDMS matrix is ​​combined with a ligand by CVD and converted in situ into uniformly dispersed MOFs nanoparticles, which alleviates the aggregation of MOFs. At the same time, the surface of the composite membrane is modified, and the preferential adsorption of butanol on the PDMS surface and permeation is promoted by coating the surface with a hydrophobic silane coupling agent, thereby improving the separation performance and permeation flux of the pervaporation membrane.

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)