29 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 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 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 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 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.

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 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 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 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.

A gas detection device (1) comprises: a gas sensor (10); a first flow passage (21) in which the gas sensor (10) is positioned; one or more adsorption members (40) that include a porous material having pores that can adsorb and desorb water molecules, a gas passing through the one or more adsorption members (40) before flowing into the first flow passage (21); and a control unit (60) that controls the humidity of the gas flowing through the first flow passage (21) by adjusting the water molecule adsorption / desorption performance of the one or more adsorption members (40).

The application belongs to the technical field of gas sensors, and relates to a current dynamic model of a gas sensor, and specifically provides a dynamic detection method of a graphene transistor gas sensor, which is based on a graphene transistor direct current model, combines surface reaction kinetics to describe a reaction process of graphene and a detection gas, and simultaneously considers the effects of chemical adsorption and physical adsorption, so that the description of the reaction process is more accurate; further, the influence of a detection gas molecule adsorption amount on the electrical characteristics of graphene is introduced, a detection gas molecule adsorption amount kinetics model is combined with the graphene transistor direct current model, and finally, the dynamic detection model of the application is established, so that the model accuracy is effectively improved, and rapid and accurate gas concentration detection can be realized; in addition, the application can set the value of the detection gas molecule adsorption amount at an initial moment, is more in line with the actual application scenario of the gas sensor, and can meet the needs of continuous gas concentration detection of the gas sensor.

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) and food safety detection, and particularly relates to application of an Ag-GO-PAM (Polyacrylamide) flexible SERS substrate to rapid detection of pesticide residues on the surface of pericarp. According to the method, the flexible SERS substrate is used for wiping the surface of the bent peel and then is taken down, and Raman spectrum detection of the pesticide thiram is carried out. The substrate is used for detecting thiram, and has the advantages that by adding GO, PAM hydrogel can form a pore structure which is uniform in pore size and adapts to pesticide molecule adsorption and mass transfer, meanwhile, the coffee ring effect caused by excessive aggregation or uneven dispersion of silver nanoparticles is inhibited, the silver nanoparticles are promoted to form a uniform SERS hot spot area, and the detection sensitivity is improved. And collaborative optimization of SERS detection sensitivity and stability is realized. An oxygen-containing functional group on the surface of the GO and the thiram bimolecule form specific interaction, so that a Raman signal of the thiram bimolecule can be remarkably amplified; the substrate is easy and convenient to prepare, complex pretreatment is not needed, and a reliable technology is provided for efficient detection of pesticide residues.

The invention relates to a humidity-resistant ultralow-wear diamond-like carbon-based friction pair and application. The two contact surfaces of the friction pair are a superhard tetrahedron amorphous carbon film and a diamond-like carbon-based film respectively. A hydrogen-free diamond-like carbon-based film containing hydrogen (C-H) or high-sp3 (C-C) is preferably matched with a superhard tetrahedron amorphous carbon film, a dynamic lubricating layer with a lubricating phase structure and high humidity shielding performance is formed on the sliding contact surface, and the lubricating layer can autonomously adjust the interface friction behavior based on the environment humidity; and lubrication failure and abrasion aggravation caused by water molecule adsorption are effectively inhibited, and the lubrication stability and abrasion resistance of a friction pair under the wide-range humidity condition are remarkably improved. According to the application, material matching and structure optimization design are carried out according to tribological performance parameters under the variable humidity working condition, so that long-acting low-friction, near-zero-abrasion and high-reliability operation of a transmission system and precise moving parts in complex environments such as cross-space and cross-medium environments is achieved.

The invention discloses a graphene-ice layer composite lubricating structure and a preparation method and super-lubrication application thereof. The method comprises the following steps: preparing large-area single-layer graphene through a mechanical stripping method, and transferring the large-area single-layer graphene to a PDMS film; putting the graphene and the graphite substrate at the humidity gt; water molecule adsorption treatment is carried out in a 60% environment; under the same humidity, graphene and a substrate are attached at the speed of 2 [mu] m / s and are separated after being heated at 80 DEG C, a two-dimensional ice layer with the thickness of about 0.38 nm is formed between interfaces, and a graphene-ice-graphite sandwich structure is constructed. An atomic force microscope friction test verifies that the structure is under the conditions of room temperature and humidity gt; the friction coefficient in a 40% environment is reduced to 0.008 or below, and stable super lubrication is realized. The two-dimensional ice lubricating layer is constructed by actively utilizing water molecules in the room-temperature and high-humidity environment for the first time, the problem that lubrication of a two-dimensional material fails in the humid environment is solved, the process is simple, the lubricating effect is lasting, and an innovative solution is provided for a mechanical system under the high-humidity working condition.

The present application relates to the field of gas adsorption separation, and more particularly to a chlorine-modified metal organic framework material and preparation and application thereof, the present application dissolves cobalt nitrate hexahydrate, alpha, beta-di(4-pyridyl)glycol and 5-chloro isophthalic acid in a solvent, then transfers the mixture to a reaction kettle, and reacts at 60-80 DEG C for 12-48h; pink powder is obtained by filtration, and is washed; finally, the solvent in the crystal pore is removed by activation in vacuum at 150-200 DEG C for 6-12h to obtain the chlorine-modified metal organic framework material. The present application provides a suitable pore size and pore chemical environment for gas molecule adsorption separation, and provides a new idea for CH4 / N2 separation, and is expected to replace the current high-energy consumption methane enrichment mode, and has great application potential in the industrial application of adsorption separation of low-concentration coal bed methane.

The application discloses a vanadium-doped graphene / molybdenum ditelluride heterojunction-based sulfur hexafluoride decomposition gas sensing chip and system, and relates to the technical field of nanomaterials and smart grid state sensing. The core sensitive material of the sensor is a heterojunction formed by a vanadium-doped graphene layer and molybdenum ditelluride (MoTe2), which can specifically identify and quantify four key decomposition products of sulfur hexafluoride generated under electric heating faults: sulfur dioxide (SO2), hydrogen sulfide (H2S), fluorosulfinyl (SOF2) and fluorosulfonyl (SO2F2). The active sites introduced by vanadium doping and the heterojunction interface synergistic effect significantly improve the gas molecule adsorption and charge transfer efficiency, realizing room temperature high-sensitivity detection of trace decomposition components. Combined with intelligent diagnosis algorithm, the system can accurately identify different fault types such as discharge and overheating inside the equipment according to the type and concentration distribution of the decomposition gas, and issue a graded warning.

The invention provides a device for simulating the adsorption and desorption process of water molecules on lunar soil and a use method of the device, and belongs to the field of planetary scientific experimental equipment. The problem of single process simulation of adsorption or desorption of water molecules on simulated lunar soil in existing equipment is solved. In the device, a four-way table is welded with four pipelines, the four pipelines are connected with a five-way pipe and three three-way pipes, the lower end of the five-way pipe is connected with a second test tube, the left end and the right end of the five-way pipe are respectively connected with a vacuum gauge, the front end of the five-way pipe is connected with a temperature sensor, and the lower ends of the three three-way pipes are respectively connected with a first test tube, a third test tube and a quartz flask; the manipulating mechanical rod can extend into the quartz flask, the second test tube and the third test tube, a liquid nitrogen barrel is placed below the quartz flask and the test tubes, and a magnetic stirrer is arranged below the liquid nitrogen barrel. The directional transfer of the sample between the quartz flask and the second test tube is realized through the control of the mechanical rod, and the sublimation-adsorption-desorption circulation process of water ice in the polar region of the moon is completely reproduced.

The present application relates to a kind of noble metal supported catalyst and its preparation method and application, and the noble metal supported catalyst includes carrier and active component;The carrier is defective cerium dioxide, and the active component is rhodium;Active component is embedded in cerium dioxide crystal face by forming Rh-O-Ce bond with carrier;The existing form of rhodium includes monatomic cluster.In the present application, the high dispersion of active component rhodium is promoted by defect engineering, and the metal utilization rate of rhodium can be significantly improved by the monatomic cluster obtained, and the synergistic effect in cluster can enhance water molecule adsorption and dissociation capacity through Rh-O-Ce interface charge polarization effect, reduce the breaking energy barrier of O-H bond, efficiently promote the generation of active hydroxyl species and the oxidation reaction of acetyl intermediate, and then show excellent low-temperature catalytic activity and hydrogen production efficiency.

The invention discloses a double-layer asymmetric structure composite film and a preparation method and application thereof.The composite film has humidity adjusting performance and is of a double-layer asymmetric structure, the inner layer is an active layer, the outer layer is a barrier layer, the active layer has the effect of achieving water molecule adsorption-desorption balance, and the barrier layer has the effect of achieving water molecule adsorption-desorption balance. The blocking layer has the effect of isolating water exchange inside and outside the composite film. According to the composite film, the limitation of a single-layer film in the aspect of regulating and controlling the relative humidity (RH) of a packaging environment is solved: the outer barrier layer can maintain relatively high RH by virtue of excellent water vapor barrier property, and the inner active layer realizes dynamic balance of the RH by virtue of a water vapor adsorption-desorption effect. The asymmetric humidity adjusting mechanism can accurately control the humidity of the storage environment of agricultural products such as fruits and vegetables, provides a novel solution for agricultural product preservation, and shows good application potential in the field of agricultural product preservation.

The utility model provides a dehumidification device for a maritime work platform, which belongs to the field of ventilation and dehumidification and comprises a box body, an air inlet groove and an air outlet groove are respectively arranged on two sides of the inner wall of the box body, and the inner wall of the air inlet groove is fixedly connected with a processing fan through an air inlet bin. The other end of the processing fan is connected with the dehumidification assembly through the salt mist removing assembly, the dehumidification assembly is fixedly connected with one end of the regeneration fan through the heating box, and the other end of the regeneration fan is connected with the inner wall of the air outlet bin and the inner wall of the air outlet groove. The two pumps are matched with the two liquid pumping pipes to pump out mixed liquid in the liquid storage tank, the mixed liquid is fed into the liquid storage pipe through the two liquid feeding pipes, the liquid storage pipe is matched with the spraying covers to spray out the mixed liquid, wet air entering the treatment tank is subjected to a mixed reaction, salt mist in the wet air is liquefied, separated, collected and discharged, and the salt mist treatment efficiency is improved. And two salt molecule adsorption nets on the inner wall of the treatment box are convenient for further adsorbing and filtering salt mist in the wet air, so that the purpose of removing the salt mist by the dehumidification device is achieved.