45 results about "Molecule adsorption" patented technology

The invention relates to the field of cavity ring-down, in particular to a cavity ring-down spectrum detection system and method, and the system comprises a detection unit, a gas path system, a constant temperature control unit and a control and processing unit. The gas path system can be used for filling inert protective gas into the ring-down cavity and maintaining a micro-positive pressure state in a non-measurement period of the detection system, so that external pollutants and water vapor are effectively prevented from invading, and lens pollution and internal adsorption are reduced; the constant-temperature control unit is used for carrying out overall temperature control on the ring-down cavity and the gas path system and inhibiting signal drift caused by water molecule adsorption / desorption; and the gas path system adopts a low-adsorption material, a dead-cavity-free structure and a low-leakage sealing joint, so that the memory effect and the leakage risk are further reduced. The invention also provides a corresponding detection method which comprises the steps of micro-positive pressure maintenance, constant temperature control, strong purification, sample measurement and the like. According to the system and the method, the measurement precision and the stability are remarkably improved, the maintenance frequency and the startup purging time are reduced, and the maintenance requirement is reduced.

The invention discloses a wide-detection-range and high-resolution electrochemical humidity sensor based on ionic liquid and a preparation method thereof, and belongs to the technical field of humidity sensitive elements and humidity sensors. The electrochemical humidity sensor comprises a substrate as well as a humidity sensitive layer and an electrode which are arranged on the substrate, the humidity sensitive layer is made of ionic liquid, and the electrode is made of electrode materials with different activities. According to the electrochemical humidity sensor, the ionic liquid has good water molecule adsorption and ionic conductivity characteristics, the adsorbed water molecules can be dissociated to form H < + >, the ionic liquid can also be dissociated to form positive ions and negative ions to participate in conduction after adsorbing the water molecules, and the humidity sensitivity of the electrochemical humidity sensor is improved through synergistic ionic conduction; a wide humidity detection range (0-100% RH), a low humidity detection lower limit (as low as 1% RH) and a high detection resolution (1% RH) are realized.

The utility model relates to a portable water trapping device based on MOFs (Metal-Organic Frameworks). The portable water trapping device comprises a main shell, and an air inlet and an air inlet fan are arranged at the top of the side surface of the main shell; an HEPA (High Efficiency Particulate Air) filter screen and an activated carbon air filtering module are arranged below the air inlet fan; an MOFs water molecule adsorption module and an electric heating element for heating the MOFs water molecule adsorption module are arranged below the activated carbon air filtering module in a communicating manner; a thermoelectric refrigeration TEC element and a condensation cavity in contact with a refrigeration area of the TEC element are arranged below the MOFs water molecule adsorption module, and an exhaust port communicated with the condensation cavity is formed in the side face of the main shell; a water filtering module and a water tank communicated with the water filtering module are arranged below the condensation cavity in a communicating manner; a power distribution unit is further arranged in the main shell and used for supplying power to the air inlet fan, the electric heating element and the TEC element. The device can be carried to outdoor places such as the field, air water trapping in a dry environment is achieved, and fresh water resources are provided for use.

The invention discloses an air-stable sulfide solid electrolyte as well as a preparation method and application thereof, and relates to the technical field of solid-state lithium batteries. The chemical formula of the sulfide solid electrolyte is Li < 5.4 > P < 1-x > S < 4.4 > M < x > Cl < 1.6-y > X < y >, x is greater than 0 and less than 0.08, y is greater than 0 and less than 1, and M is selected from at least one of Fe, Zn, Ge, Zr, Sn, Ca, Mg, Ti or Ag; x is selected from at least one of F, Cl, Br and I. According to the sulfide solid electrolyte disclosed by the invention, through double-element doping of metal elements and halogen, the surface energy of a material is reduced, water molecule adsorption is inhibited, meanwhile, the ionic conductivity of the sulfide solid electrolyte can be obviously improved, and the conductivity of the sulfide solid electrolyte is not obviously attenuated in a high-humidity environment.

The invention relates to the technical field of adsorbents, and provides an efficient molecular sieve adsorbent for adsorbing carbon dioxide and a preparation method of the efficient molecular sieve adsorbent aiming at the problem that a traditional Na-type 13X molecular sieve is poor in CO2 adsorption performance under low partial pressure. The adsorbent is prepared by using a template agent, aluminum hydroxide, nano aluminum oxide and silica sol as raw materials through the steps of crystallization, calcination and the like. The template agent is a functional molecule integrating a phosphonic acid group, long-chain alkyl and polyethylene glycol dicarboxylic acid, the phosphonic acid group stabilizes a skeleton, the long-chain alkyl provides a graphene-like layer to inhibit water molecule adsorption, and the polyethylene glycol dicarboxylic acid guides micropores to grow orderly and cooperate with each other to form the efficient molecular sieve adsorbent for carbon dioxide adsorption. The CO2 adsorption capacity, the dynamic adsorption rate and the moisture resistance of the adsorbent under low partial pressure are improved.

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

The invention discloses a coal slime sedimentation treatment device, belongs to the technical field of coal slime sedimentation, and aims to solve the problem of low interception efficiency of fine coal slime caused by extremely small gravity of fine coal slime particles and difficulty in effectively capturing and settling the fine coal slime particles to the bottom of a tank. The coal slime sedimentation treatment device comprises a horizontal flow sedimentation tank, a lifting part is fixedly mounted on one side of the horizontal flow sedimentation tank, and a fixed seat is mounted on one side of the lifting part; according to the device, a high-frequency alternating electromagnetic field is used for destroying a double-electric-layer structure of fine coal slime particles and breaking a water molecule adsorption film to enable the fine coal slime particles to be in a to-be-agglomerated state, the driving part drives the output part to rotate, and therefore the fine coal slime particles can be agglomerated in the to-be-agglomerated state; and then the four electromagnetic parts are driven to synchronously rotate, so that fine coal slime particles in a to-be-agglomerated state are more easily collided, adsorbed and quickly agglomerated to form floccules with larger particle sizes and stronger gravity under the dual effects of electric field force and mechanical stirring force, and the settling speed is greatly accelerated.

The invention belongs to the technical field of new materials, and discloses a preparation method and application of a stimuli-responsive flexible two-dimensional zinc-based complex. The structural unit of the complex is [Zn2 (OH) 2 (H2L1) 4], Zn is a divalent zinc ion, H2L1 represents a ligand: 4, 4 '-(2, 2-di-p-methylphenyl ethylene-1, 1-diyl) dibenzoic acid, and a ligand: 4, 4'-(2, 2-di-p-methylphenyl ethylene-1, 1-diyl) dibenzoic acid; wherein the structure of the two-dimensional zinc-based complex belongs to a hexagonal crystal system and a P-3 space group, and the cell parameters of the two-dimensional zinc-based complex are as follows: the axial length is # imgabs 0 # # imgabs 1 #, the axial angle is alpha = beta = 90 degrees, gamma = 120 degrees, and the cell volume is # imgabs 2 # Z = 6. Based on tetraphenylethylene (TPE), a material structure is constructed by modifying a functional methyl functional group on a benzene ring serving as a rotor group. The H2L1 contains two active benzene rings with methyl, and the benzene rings can still perform internal molecular movement even after forming a complex, so that the H2L1 is not limited. Therefore, the two-dimensional zinc-based complex can show stimulus-responsive structure reversible conversion during gas molecule adsorption, so that gas is specifically adsorbed. The two-dimensional zinc-based complex has the potential to be applied to the field of low-carbon hydrocarbon gas separation.

The invention belongs to the technical field of material surface performance detection, and particularly relates to a method for detecting biological pollution resistance and durability of a silicone rubber surface, and the method comprises the following steps: S1, sequentially carrying out biological membrane inhibition rate quantitative detection, antibacterial adhesion detection, protein adsorption resistance test and surface wettability test on a silicone rubber sample to be detected; s2, carrying out durability treatment on the parallel sample; s3, repeating partial or all tests in the step S1 on the sample treated in the step S2; s4, comparing the performance data obtained in the step S1 and the performance data obtained in the step S3, and evaluating the biological pollution resistance and durability of the silicone rubber sample. According to the invention, biological membrane inhibition rate quantitative detection, anti-bacterial adhesion detection, anti-protein adsorption performance test, surface wettability analysis and durability test are organically combined to form a complete evaluation closed loop from molecular adsorption to microbial community and from immediate efficiency to long-acting stability, and all key links of biological pollution are comprehensively covered.

The invention relates to a sintered red clay coating solid-phase extraction fiber, a preparation method thereof and an application of the sintered red clay coating solid-phase extraction fiber in measuring the sensitivity of moisture in mineral oil, and belongs to the technical field of analytical chemistry. The invention aims to overcome the limitation of the existing solid-phase microextraction coating on the aspects of cost, mechanical strength, thermal stability and water molecule adsorption selectivity. The core of the preparation method comprises the following steps: drying red clay in the sun, sieving to obtain powder, mixing the powder with deionized water according to a mass ratio, and standing and kneading twice to form a mud pie; taking the mud pie, adding water, uniformly mixing, vertically inserting and pulling out a stainless steel wire for 2-4 times to form a uniform coating, drying in the shade, trimming, and calcining to obtain the fiber. According to the fiber, efficient and specific adsorption of water molecules is realized by utilizing a porous structure of the sintered red clay and retaining hydroxyl groups, and trace moisture in mineral oil such as gasoline and diesel oil is detected by combining a headspace extraction-GC / TCD (Gas Chromatography / Thermal Conductivity Detector) coupling technology.

The invention provides a gas chromatograph-based medicinal material volatilization detection method and a gas chromatograph-based medicinal material volatilization detection system, which are characterized in that water-containing medicinal material volatile matters are input into a nano-porous structure adsorption layer for water molecule adsorption to obtain dehydrated medicinal material volatile matters; inputting a preset carrier gas flow into the dehydrated medicinal material volatile matter for mixing to generate a volatile matter in a gas flow mixed state; inputting the volatile matter in the airflow mixed state into a preset micro-packed column separation channel to obtain a separated volatile component; and inputting the separated volatile components into a plurality of preset thermal conductivity type synchronous detection units for parallel detection, and generating a multi-channel detection signal for medicinal material volatilization detection. According to the invention, baseline drift interference of a high-humidity sample is eliminated, uniform dispersion of complex components is guaranteed, the separation efficiency limitation of a traditional chromatographic column on viscous volatile matters of medicinal materials is broken through, the problem of signal capture deficiency of rapid peak components is solved, and a full-chain anti-interference detection mechanism from sample pretreatment to signal output is formed.

The invention relates to the field of alkane selective adsorbents, in particular to a methyl-modified metal organic framework material and preparation and application thereof.The methyl-modified metal organic framework material is prepared by dissolving cobalt nitrate hexahydrate, alpha, beta-bis (4-pyridyl) ethylene glycol and 2, 5-dimethyl terephthalic acid in an organic solvent, then transferring a mixed system into a reaction kettle, conducting heating reaction, filtering and washing, and conducting drying and roasting to obtain the methyl-modified metal organic framework material. And activating the crystal in dynamic vacuum under a heating condition to remove the organic solvent in crystal pore channels, thereby obtaining the methyl modified metal organic framework material. According to the method, two methyl functional groups are introduced to the ligand of MOFs, so that the selectivity of CH4 / N2, C3H8 / C3H6 and C2H6 / C2H4 is synchronously and effectively improved, and effective separation of light hydrocarbons is realized. The synthesized compound provides a proper pore diameter and pore channel chemical environment for adsorption separation of gas molecules, and provides a new idea for separation of light hydrocarbons.

The present invention provides a method and system for detecting medicinal material volatilization based on a gas chromatograph, wherein water-containing medicinal material volatiles are input into a nanoporous structure adsorption layer for water molecule adsorption to obtain dehydrated medicinal material volatiles; a preset carrier gas flow is input into the dehydrated medicinal material volatiles for mixing to generate volatiles in a mixed airflow state; the volatiles in the mixed airflow state are input into a preset micro-filling column separation channel to obtain separated volatile components; the separated volatile components are input into multiple preset thermal conductivity synchronous detection units for parallel detection to generate multi-channel detection signals for medicinal material volatilization detection. The present invention eliminates the baseline drift interference of high-humidity samples, ensures the uniform dispersion of complex components, breaks through the separation efficiency limit of traditional chromatographic columns for viscous volatiles of medicinal materials, solves the problem of missing signal capture of fast-peaking components, and forms a full-chain anti-interference detection mechanism from sample preprocessing to signal output.

This invention belongs to the field of radiation source pulse sorting technology, specifically relating to a radiation source pulse sorting method, program, device, and storage medium. This invention models the determination process of the neighborhood radius and minimum number of neighborhood points for DBSCAN clustering in the pre-sorting of radiation source pulses as a multi-objective optimization problem, designs a multi-objective hoarfrost ice crystal optimization algorithm, and introduces multiple clustering performance indicators as optimization objectives under a unified evaluation framework to jointly constrain multiple structural performance aspects of the pre-sorting results. Simultaneously, an ice crystal subpopulation structure is introduced into the hoarfrost algorithm, integrating water molecule adsorption and soft frost search mechanisms, enabling the parameter search process to maintain both global search capability and good local search capability, ensuring the basic consistency of the pulse sequence structure in the pre-sorting results. This provides reliable input for the subsequent main sorting of each radiation source pulse sequence, reducing the problem of mis-batch sorting in radiation source pulses.

The invention relates to the technical field of pig farm monitoring systems and methods based on intelligent sensors, and particularly discloses a pig farm monitoring system and method based on intelligent sensors. The system comprises an environment sensing module, a data processing and compensation module, a control decision module and an execution mechanism module. According to the method, the multivariable compensation model fusing the temperature, the humidity and the air pressure is constructed and applied to dynamically correct the output signal of the electrochemical ammonia gas sensor in real time, so that systematic measurement drift caused by a water molecule adsorption effect caused by a high-humidity environment is fundamentally stripped. By means of the technical measure, the system can obtain the ammonia gas concentration value highly close to the real situation, an accurate and reliable data basis is provided for subsequent environment regulation and control decisions, and equipment misoperation caused by sensor misinformation is avoided.

The disclosure relates to an electrolysis cell for catalyst-free electrolysis of water molecules from a humid atmosphere to produce hydrogen gas comprising an electrically conductive carbon fiber gas diffusion anode and an electrically conductive carbon fiber gas diffusion cathode. A graphene oxide membrane or a graphdiyne oxide membrane is disposed between the electrically conductive carbon fiber gas diffusion anode and electrically conductive carbon fiber gas diffusion cathode. The temperature of the cell can be varied to increase water molecule adsorption (condensation), dissociation rate, and proton current, hydrogen evolution reaction rate, and hydrogen production. In one practice, humid air is contacted against a surface of the carbon fiber gas diffusion anode that is cooled down to the dew point or slightly lower than the dew point temperature of the humid air, which surface that is opposite the membrane.

The present application relates to a kind of based on density functional theory of doped iron-based catalyst and its research method, belong to material science, catalysis science and computational chemistry technical field.It includes the following steps: step 1: on the basis of existing model supercell is carried out;Step 2: using PBE function and projector augmented wave method optimization obtains γ-Fe2O3 crystal structure;Step 3: further optimization, obtain the model of γ-Fe2O3(001) surface;Step 4: with rare earth element Pr replaces one Fe atom of γ-Fe2O3(001) surface structure and is optimized again;Step 5: to the model obtained in step 4, introduce NH3 molecule adsorption in, calculate gas adsorption energy E abs ;Step 6: data post-processing analysis is carried out, and PDOS diagram is obtained.The research method of the present application solves the deficiency of traditional catalyst preparation "trial and error method", low in cost, easy to operate, easy to realize, suitable for application and promotion, saves experiment time.

The invention belongs to the technical field of gas detection, and discloses a two-dimensional metal organic framework Fen (bim) 2n packaged gas sensor and a preparation method thereof. The two-dimensional metal organic framework Fen (bim) 2n is prepared by adopting an ammonia-assisted chemical vapor deposition method and is used as a sealing layer of the MoS2 gas sensing layer, and the influence of water molecule adsorption on the two-dimensional metal organic framework Fen (bim) 2n is reduced by utilizing the hydrophobic characteristic of the Fen (bim) 2n; and by utilizing the characteristics of porosity and high specific surface area, NO2 gas diffuses, penetrates through and reaches the sensing layer and compensates electrons lost after the MoS2 adsorbs NO2, so that the sensing performance and the moisture resistance of the sensor are improved. The Fen (bim) 2n / MoS2 gas sensor is prepared by adopting mechanical stripping and dry method transfer and combining with the auxiliary effect of water, and can realize reversible, rapid and high-sensitivity sensing detection on NO2 at room temperature and under the humidity environment of 70% RH (Relative Humidity).

The application discloses a kind of metal organic framework composite material and its preparation method and application, preparation method is: metal source and the organic ligand source containing hydrazine hydrate are added to solvent, stirring uniformly, then 5-7h is reacted at 120-140 DEG C, separation, obtain metal organic framework material;Metal organic framework material after heating activation is immersed in SrTiO3:Al suspension, drying can be obtained.The metal organic framework composite material prepared in the application has excellent hydrophilicity and adsorption energy, rich water molecule adsorption site, unique pore structure in structure and large-area contact with air;Adsorbed water molecules are rapidly released under the driving of sunlight, flow through the surface of SrTiO3:Al, in gaseous form fills in closed environment, which opens up a sustainable way to produce green hydrogen in situ only using natural resources in extreme environment.

The present invention discloses a method for improving the sensing selectivity of sensitive materials in the field of materials science and technology. The target gas to be measured is input into the sensitive material database to retrieve the sensitive materials. The various gases of the target gas and interfering gases in practical applications and the sensitive materials are input into the expert database to retrieve the structural data. Based on this, a material surface-gas molecule adsorption model is constructed. By using the first-principles method to simulate the adsorption process and mechanism of gas molecules on the material surface, the essence of the interference of interfering gases on the selective adsorption of sensitive materials-target gases is determined. A surface functionalization scheme is proposed to adjust the types of surface active sites of sensitive materials, thereby regulating the adsorption strength of different gas molecules. The sensing performance of the nanosensor device of the surface-functionalized sensitive material is constructed. The adsorption and sensing performance data can be obtained simply and quickly, reducing the consumption and expenditure of manpower and material resources, saving time, improving the efficiency of the research and development of sensitive materials, and having great practical value.

The invention relates to a preparation method and application of a Bi2Sn2O7 / Bi2MoO6 S-type heterojunction composite material, Bi (NO3) 3 is dissolved in an ethanol / ethylene glycol mixed solution, Na2MoO4 is added under magnetic stirring, the mixture is stirred to be clarified, the mixture is subjected to a heating reaction, precipitates are centrifugally separated after cooling, the precipitates are alternately washed with ultrapure water and ethanol and dried to obtain Bi2MoO6 nanosheets, Bi (NO3) 3 and Na2SnO3 are added into ultrapure water, and the Bi2MoO6 nanosheets are obtained after drying. The Bi2Sn2O7 / Bi2MoO6 nanoflower heterojunction composite material has the advantages that the Bi2Sn2O7 / Bi2MoO6 nanoflower heterojunction composite material has a large number of active sites and better adsorption performance, can be used for N2 molecule adsorption and activation, and can be used for preparing the composite material for preparing the Bi2Sn2O7 / Bi2MoO6 nanoflower heterojunction composite material. The compact interface contact effectively accelerates the separation of photo-generated holes and electrons, the unique S-type electron transfer mechanism also retains the reduction ability of a strong reduction semiconductor, when the Bi2Sn2O7 / Bi2MoO6 photocatalyst is used for photocatalytic nitrogen fixation, the yields of Bi2Sn2O7 / Bi2MoO6 under the irradiation of a 300W xenon lamp are respectively improved by 10.4 and 18.6 times compared with pure Bi2Sn2O7 and Bi2MoO6, and the Bi2Sn2O7 / Bi2MoO6 photocatalyst can be used in the field of photocatalytic nitrogen fixation.

The invention discloses a preparation method of a metal organic framework aminated lignosulfonate composite material. The preparation method comprises the following steps: S1, respectively dissolving Co (NO3) 2.6 H2O and C4H6N2 in a methanol solution to obtain a pink solution A and a colorless solution B; s2, adding aminated sodium lignin sulfonate into the solution A, and mixing and stirring; s3, pouring the solution B into the solution A, fully magnetically stirring, standing, and centrifugally separating to obtain a separated substance; and S4, washing the isolate obtained in the step S3 for several times, and drying and grinding to obtain the aminated lignosulfonate metal organic framework material.The preparation method overcomes the technical bottlenecks of low adsorption efficiency, high cost and difficulty in regeneration and degradation of an adsorbent in the prior art, so that the problem that the adsorption material loses efficacy due to small saturated adsorption capacity is solved; the problem of weak mechanical strength is solved, and the methyl blue molecular adsorption treatment potential for efficiently purifying dye wastewater is realized.

The invention relates to a half-piece cutting and repairing method for a solar cell piece, a half-piece cell piece, a solar cell module and a preparation method of the solar cell module. According to the method, after the whole piece is cut through laser, the cutting face is sequentially subjected to alkali polishing treatment, laser energy oxidation and deposition passivation dual repair; wherein the surface of the alkali-polished plane is subjected to hydroxyl (-OH) treatment, so that the adsorption capacity of oxygen molecules can be improved, then laser energy acts on the oxygen molecules adsorbed on the cutting surface, silicon oxide is formed through oxidation, a silicon nitride layer is formed through deposition and passivation, and the cut solar cell half-piece section is obtained. The defects of microcracks and lattice damage of the cell cutting surface caused by laser cutting are repaired, and the power of the solar cell half-piece assembly is further improved.

The disclosure relates to an electrolysis cell for catalyst-free electrolysis of water molecules from a humid atmosphere to produce hydrogen gas comprising an electrically conductive carbon fiber gas diffusion anode and an electrically conductive carbon fiber gas diffusion cathode. A graphene oxide membrane or a graphdiyne oxide membrane is disposed between the electrically conductive carbon fiber gas diffusion anode and electrically conductive carbon fiber gas diffusion cathode. The temperature of the cell can be varied to increase water molecule adsorption (condensation), dissociation rate, and proton current, hydrogen evolution reaction rate, and hydrogen production. In one practice, humid air is contacted against a surface of the carbon fiber gas diffusion anode that is cooled down to the dew point or slightly lower than the dew point temperature of the humid air, which surface that is opposite the membrane.

The invention discloses preparation of a functional SiO2-coated TiO2 composite material with a core-shell structure and a design method for oriented growth of the functional SiO2-coated TiO2 composite material. According to the composite material, an inner core SiO2 is taken as a carrier, and ordered oriented growth of TiO2 on the surface of the inner core SiO2 is realized by regulating and controlling the hydrolysis process of a titanium source precursor, so that a uniform and compact catalyst shell with controllable thickness is formed. According to the structural design, on one hand, the adsorption capacity of carbon dioxide molecules is improved through the high specific surface area and the surface hydroxyl characteristic of SiO2, and on the other hand, the carrier separation efficiency is improved and the specific crystal face exposure degree is enhanced through ordered growth of a TiO2 shell layer, so that the photocatalytic reduction activity and the product selectivity are remarkably improved. The method is simple in process and high in controllability, and the obtained composite material has good stability and application prospects.

The application belongs to the technical field of adsorption materials, and particularly relates to a preparation method of biomass carbon gel material and application thereof. The biomass carbon gel material has excellent methanol adsorption performance, and can realize efficient adsorption of methanol and good water molecule adsorption capacity on the basis of unique pore structure characteristics and surface functional group distribution. With the dual adsorption characteristics, the biomass carbon gel material is not only suitable for a methanol adsorption refrigeration system, but also can be applied to water adsorption refrigeration, air dehumidification, water vapor recovery and other fields, greatly improving the multifunctionality and application scenarios of the adsorption material, and providing a new technical path for development and industrial application of multifunctional adsorption materials.

The invention relates to the technical field of metal organic framework materials, in particular to a nitro-modified metal organic framework material and preparation and application thereof.The nitro-modified metal organic framework material is prepared by the steps that zinc nitrate hexahydrate, 3-amino-1, 2, 4-triazole and 5-nitro-1, 3-phthalic acid are dissolved in a solvent, then the mixture is transferred into a reaction kettle, a heating reaction is conducted, white powder is obtained through filtering, and the nitro-modified metal organic framework material is obtained; and washing, exchanging overnight by using methanol for Soxhlet extraction, activating the crystal in dynamic vacuum under a heating condition, and removing the solvent in crystal pore channels to obtain the activated nitro-modified metal organic framework material. The method provided by the invention is expected to replace the existing methane enrichment mode with high energy consumption, is a promising low-concentration methane purification adsorbent, and has great application potential in industrial application of adsorption separation of low-concentration coal bed gas. The compound provides a proper pore diameter and pore channel chemical environment for CH4 molecular adsorption, and provides a new idea for separation of CH4 / N2.

According to the graded gold / tungsten oxide anti-dot array material, the graded gold / tungsten oxide anti-dot array material is arranged in a regular honeycomb shape, tungsten oxide nanopores grow in honeycomb gaps, and gold nanoparticles are evenly distributed in the honeycomb gaps. The invention further discloses a preparation method of the graded gold / tungsten oxide anti-dot array material and application of the graded gold / tungsten oxide anti-dot array material. According to the preparation method of the graded gold / tungsten oxide anti-dot array material, polystyrene spheres with different sizes are spin-coated and dried twice, then tungsten oxide with a graded structure is obtained, the tungsten oxide with the graded structure has a large specific surface area and a carrier transmission channel, and adsorption reaction of gas molecules and rapid transmission of charges are facilitated.

The application relates to a lunar permanent shadow area water molecule adsorption and desorption experiment method and belongs to the field of space environment simulation. The method solves the problem that the coincidence degree of a preparation method of an existing simulation object and real lunar soil water ice is low, and the difference between physical property indexes and theoretical values of real lunar soil water ice is large. The method comprises the following steps: placing an experimental sample array into a deep low-temperature vacuum environment simulation cabin; constructing a deep low-temperature vacuum environment, and injecting micro-quantitative water molecules into the array to adjust the water molecule atmosphere; after the environment conditions reach the experimental requirements, starting to carry out an adsorption experiment, and after T1 hours, encapsulating and transferring the adsorption experimental sample; after encapsulation is completed, extracting residual water molecules in the environment simulation cabin, and re-creating a clean vacuum environment; simultaneously adjusting the sample temperature in the desorption sample area and the migration sample area to meet the experimental conditions; after T2 hours of desorption experiment is continuously carried out, the desorption experimental sample is encapsulated and transferred, and after T3 hours of migration experiment is continuously carried out, the migration experimental sample is encapsulated and transferred. The method is applied to the field of lunar exploration engineering.

The invention belongs to the technical field of gas adsorption separation, and particularly relates to an indium-based metal organic framework material as well as a preparation method and application thereof. Soluble indium salt and triphenylphosphine oxide tricarboxylic acid are jointly dissolved in a solvent to obtain a mixture, then the mixture is transferred into a reaction kettle, a solvothermal reaction is carried out, and the indium-based metal organic framework material is obtained. According to the method, a proper pore diameter and pore channel chemical environment is provided for gas molecule adsorption separation, a new idea is provided for separation of acetylene in a C2H2 mixture, the requirement for high purity of acetylene in the chemical industry and other fields is expected to be met, and the method has wide application potential in acetylene production and complex gas treatment.