221 results about "Molecular adsorption" patented technology

The invention belongs to the technical field of zinc battery electrolyte, and discloses application of pyridine hydrochloride as an electrolyte additive in stabilizing a zinc negative electrode and realizing four-electron transfer of a zinc-iodine secondary battery. The hydrochloride containing the pyridine structure is used as an electrolyte additive, molecules of the pyridine structure are adsorbed on the surface of the zinc negative electrode to form a shielding layer, the deposition / stripping reversibility of the zinc negative electrode is improved, stabilization of the zinc negative electrode can be achieved, and the problems of zinc dendritic crystal, corrosion and hydrogen evolution are solved. Meanwhile, molecules with pyridine structures can activate and stabilize I- / I0 / I < + > four-electron redox reaction, inhibit I < + > hydrolysis side reaction and improve the energy density and cycling stability of the zinc-iodine battery. The problem of poor electrochemical deposition / stripping reversibility of a zinc negative electrode and the problem of poor stability of positive valence I < + > species of an iodine positive electrode of a four-electron transfer reaction are solved. The electrolyte containing the additive is low in cost, simple in method, easy to produce and high in practical value.

The invention discloses a zinc-bromine flow battery multifunctional negative electrode electrolyte and a preparation method thereof, and belongs to the technical field of electrochemical energy storage, and the method comprises the following steps: uniformly stirring and mixing a solvent, deionized water and a cosolvent, adding an electrolyte, stirring until the electrolyte is completely dissolved, then adding a supporting electrolyte and a negative electrode additive, stirring until the supporting electrolyte and the negative electrode additive are completely dissolved, and obtaining the zinc-bromine flow battery multifunctional negative electrode electrolyte. The multifunctional negative electrode electrolyte of the zinc-bromine flow battery is obtained; the negative electrode cosolvent is dimethylformamide; and the negative electrode additive is at least one of saponin and cinnamyl aldehyde. Saponin molecules are adsorbed on the surface of the zinc electrode, and electronegative carboxyl groups of the saponin molecules form an electrostatic repulsion net in an electric double layer, so that zinc ions are forced to be uniformly dispersed, local ion concentration hot spots are eliminated, and dendritic crystal nucleation is inhibited from the source. In cinnamyl aldehyde, the strong electronegativity of oxygen atoms and the electronegativity of aldehyde oxygen are far higher than those of hydrogen, so that electrons are strongly attracted, adjacent carbon atoms are positively charged, polar adsorption sites are formed, the hydrogen evolution reaction is effectively inhibited, and the stability and the cycle life of the battery are greatly improved.

The invention provides a high-molecular adsorption material with high selectivity on platinum group metals as well as a preparation method and application of the high-molecular adsorption material, and belongs to the technical field of material science. Comprising the following steps: (1) preparing a methanol solution containing platinum group metal ions, and adding a functional monomer mixture and modified graphene oxide to form a pre-assembled compound; (2) adding a cross-linking agent and an initiator, removing oxygen, and polymerizing to obtain a polymer; and (3) grinding the polymer, eluting metal ions, washing to be neutral, and drying. The high-molecular adsorption material provided by the invention takes modified graphene oxide as a support body, template molecules and specific functional monomers (4-vinylpyridine and 2-mercaptobenzimidazole) are combined to form a pre-assembled compound, then a cross-linking agent and an initiator are added, recognition sites are fixed through cross-linking polymerization, and finally, the high-molecular adsorption material is obtained after the template molecules are eluted. The adsorbent is high in adsorption rate, capable of specifically adsorbing platinum group metal, good in stability and reproducibility and capable of being repeatedly used.

The present invention belongs to the field of shale gas technology, and in particular to a shale gas rapid desorption test device and method. Aiming at the problem that shale gas molecules have strong adsorption force and are difficult to desorb, and the shale itself has low permeability, resulting in a long experimental time for shale gas desorption test, the following scheme is proposed, including a main box, wherein a crushing and screening module is arranged inside the main box, and the crushing and screening module includes a base and a fixed cylinder, the base and the fixed cylinder are fixedly connected to the bottom inner wall of the main box, the inner wall of the fixed cylinder is slidably connected to a mounting cylinder, an acceleration module is arranged on the mounting cylinder, and a tray is fixedly connected to the bottom inner wall of the mounting cylinder. A shale gas rapid desorption test device and method disclosed by the present invention can make shale sample particles vibrate in the vertical direction during desorption, and at the same time, stirring with a stirring paddle can make the gas inside the shale sample more fully contact the desorption environment, thereby accelerating the desorption process.

The invention relates to the technical field of epoxy resin, and discloses a triazolyl diatomite modified epoxy resin paint, which is characterized in that epoxidized diatomite reacts with lignin to obtain lignin modified diatomite, the lignin modified diatomite reacts with isophorone diisocyanate to obtain isocyanated lignin modified diatomite, and the isocyanated lignin modified diatomite reacts with isophorone diisocyanate to obtain the triazolyl diatomite modified epoxy resin paint. The preparation method comprises the following steps of: further reacting with an imino group in benzotriazole to obtain benzotriazolyl lignin modified diatomite, and blending the benzotriazolyl lignin modified diatomite with epoxy resin and other assistants to finally obtain the triazolyl diatomite modified epoxy resin paint. The mechanical properties such as bending strength and impact strength of the composite epoxy resin paint are improved, the diatomite can form a physical barrier layer to block invasion of corrosive media such as water and oxygen, and the benzotriazole group can form a monomolecular adsorption film on the surface of a matrix, so that the corrosion inhibition and corrosion prevention performance is achieved; the comprehensive performance of the epoxy resin paint is effectively improved.

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 belongs to the field of microorganisms, and particularly relates to a biochar-based immobilized microbial agent for promoting litter decomposition and a preparation method thereof.The biochar-based immobilized microbial agent for promoting litter decomposition comprises a biochar-based culture medium and a microbial seed solution, the active ingredient of the microbial seed solution is phanerochaete chrysosporium, and the preservation number is SHBCC D13411. According to the invention, the adsorption efficiency of the microbial agent is enhanced through the iron-modified biochar, and a habitat suitable for development and reproduction is provided for microorganisms; on the other hand, the biochar has very strong hygroscopicity, water molecules can be adsorbed on the surface, and a suitable growth environment is provided for microorganisms, so that the microorganisms are promoted to decompose litters.

The invention provides a storage system for immunofluorescence slide glass and an intelligent temperature and humidity coupling control method thereof. The system comprises a closed sample cabin, a controller, a passive buffer layer and other structures, and the temperature and humidity in the cabin can be stably controlled in a dynamic environment. The temperature and humidity in the cabin and the temperature of the key cold surface are monitored in real time through the sensing unit, the local dew point is calculated, and temperature and humidity control is executed. And the controller executes a layered gradient coupling control algorithm according to the dynamic dew point safety margin to ensure accurate control of temperature and humidity. The passive buffer layer is of a composite structure of a phase change material and a moisture absorption material, and the temperature and humidity are adjusted through solid-liquid phase change and molecular adsorption. The system can effectively improve the storage stability and safety of the immunofluorescence slide, and is suitable for sample storage management in industries such as life science and biological pharmacy.

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 invention relates to a thiourea-based aromatic porous organic polymer as well as a preparation method and application thereof, and belongs to the technical field of functional polymer adsorption materials. The preparation method comprises the following steps: respectively dissolving a plurality of ternary aromatic amine monomers with different electron pushing (electron donating) effects and cheap binary isothiocyanate monomers, mixing, uniformly shaking, and reacting to obtain a porous organic polymer network which is shown as organogel; and grinding the organogel into powder, then carrying out solvent exchange in dichloromethane, treating in methanol by using a Soxhlet extractor, and finally drying to obtain the product. The thiourea-based aromatic porous organic polymer provided by the invention has good adsorptive selectivity to Au, high adsorption capacity, wide pH adaptation range, good cyclic adsorption performance, simple preparation method and relatively high practical application value.

The invention belongs to the technical field of molecular adsorption separation solid-phase microextraction, and discloses a covalent organic framework solid-phase microextraction fiber coating modified after sulfydryl-alkene click reaction as well as a preparation method and application of the covalent organic framework solid-phase microextraction fiber coating. The preparation method comprises the following steps: mixing a covalent organic framework, a derivatization reagent, a first initiator and a first solvent, and carrying out a click reaction under a protective atmosphere to obtain a post-modified covalent organic framework; and mixing the post-modified covalent organic framework, a cross-linking agent, a second initiator and a second solvent, and carrying out polymerization reaction in a protective atmosphere to obtain the thiol-ene click reaction post-modified covalent organic framework solid-phase microextraction fiber coating. Groups with different recognition capabilities are introduced into the porous structure of the covalent organic framework, the adsorption performance of the covalent organic framework is remarkably improved, the solid-phase microextraction fiber coating is further prepared by adopting a thermal polymerization method, and the use form of the covalent organic framework is enriched.

The invention discloses a silent and noise-reducing oxygen generator, comprising an organic shell, a base is provided at the bottom of the shell, a molecular adsorption tower is provided on one side of the outside of the shell, a solenoid valve is provided at the upper end of the inside of the shell, a turbine fan is provided below the solenoid valve, a muffler is connected to the turbine fan, a muffler chamber is provided at the bottom of the base, a muffler plate is installed in the muffler chamber, a compressor is installed on the muffler plate through a spring assembly, a plurality of groups of mutually parallel partitions are provided at the bottom of the muffler plate, muffler holes are provided on the rear end plate surface of the partition, an air guide arc plate is provided on the front end relative to the outer side of the outermost partition, and an air guide plate is provided at the bottom of the muffler plate; the invention can effectively reduce the airflow sound and nitrogen exhaust noise of the device during oxygen production by taking in air from one side of the upper part of the shell, the airflow changes the exhaust airflow guide and disperses the airflow energy after passing through the muffler chamber and the muffler plate, thereby reducing the noise generated by the exhaust airflow.

The invention discloses a controllable preparation method of a methanol-mediated ammonium fluoride-assisted acetic acid etching zeolite adsorption thermal control coating, and belongs to the field of special functional coatings. The invention aims to solve the problems that a zeolite adsorption coating is low in adsorption capacity in an extreme environment and a microporous structure limits diffusion. Zeolite defects are introduced through ammonium fluoride / methanol etching, and then the hierarchical pore zeolite attached thermal control coating is prepared through acetic acid etching. Methanol is adopted as an etching medium, so that ammonium fluoride can be freely transported in a zeolite channel, in-situ hydrolysis and etching of zeolite are carried out until the ammonium fluoride is in contact with water molecules adsorbed in the zeolite channel, and uniform and controllable etching of the outer surface and the interiors of pores of the zeolite is achieved; and meanwhile, the graded zeolite molecular adsorption coating can realize self-balance of body temperature thermal control by virtue of the strong control capability of the layered and three-dimensional space graded pore channel structure on spectral absorption or emission, so that the heat dissipation capability is greatly enhanced, and the thermal control application of the graded zeolite molecular adsorption coating in spacecrafts is facilitated by virtue of the low-absorption-high-emission performance of the graded zeolite molecular adsorption coating.

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 relates to the technical field of bentonite preparation, in particular to organic modified bentonite and a preparation method thereof.The preparation method comprises the following steps that (a) natural bentonite is subjected to acidification whitening pretreatment through sulfuric acid; (b) sodium carbonate is subjected to sodium modification and transformation to obtain sodium bentonite; (c) dispersing sodium bentonite in absolute ethyl alcohol, adding 3-aminopropyltriethoxysilane (APTES) and polyethylene glycol diacrylate (PEGDA), and performing reflux reaction under the condition that the pH is 4.0 to realize silanization intercalation; (d) adding 5% of a template agent, and carrying out hydrothermal construction at 120 DEG C to form a mesoporous-macroporous hierarchical pore channel; and (e) eluting the template agent by using an ethanol / water mixed solvent, drying and crushing to obtain a finished product. According to the method, the defects that traditional bentonite is low in mass transfer efficiency and insufficient in macromolecule adsorption capacity are overcome, the adsorption capacity of organic pollutants can be improved by 40% or above, and meanwhile the structural stability in the high-temperature and acid environment is enhanced.

The invention relates to a composite gas-sensitive material, a gas sensor and a preparation method and application of the composite gas-sensitive material. The composite gas sensitive material comprises gold modified rhenium disulfide, and the molar ratio of gold to rhenium disulfide is (0.01-0.15): 1. Wherein the gold has excellent catalytic performance and can reduce the activation energy of the reaction and promote the proceeding of the surface chemical reaction. When the gold is combined with rhenium disulfide, the gold can be used as a catalyst to accelerate the adsorption and reaction process of gas molecules on the surface of the material. Meanwhile, gold and rhenium disulfide form a Schottky barrier, and carrier transmission in the rhenium disulfide material can be adjusted due to the existence of the barrier, so that the electrical property of the material is influenced. When gas molecules are adsorbed, the change of the Schottky barrier can cause the rapid change of parameters such as resistance or capacitance of the material, so that rapid response is realized, and the material has important significance in improving the sensing performance of the material.

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 discloses a preparation method and application of a nitrogen-containing heterocyclic porous covalent organic framework material. The preparation method comprises the following steps: mixing trialdehyde phloroglucinol and a nitrogen heterocyclic ring-containing monomer according to a certain mass ratio, adding an organic catalyst and a mixed solvent, degassing, sealing, carrying out solvothermal reaction synthesis, washing with a polar solvent, carrying out Soxhlet extraction and purification, and drying to obtain the nitrogen heterocyclic ring-containing porous covalent organic framework material. According to the method, a pyridazine unit and trialdehyde phloroglucinol are used as monomers to construct a COF skeleton of a nitrogen heterocyclic ring, an asymmetric pi-conjugated structure is formed, efficient electron-hole space separation is achieved, active site charge distribution is optimized through the electron-rich characteristic of the pyridazine unit, and the oxygen molecule adsorption and activation capacity is enhanced. The method adopts a green solvent, is mild in reaction condition, avoids the use of toxic reagents, is green and environment-friendly, and provides a new way for photocatalytic synthesis of hydrogen peroxide.

The invention belongs to the field of antibiotic analysis and detection, and discloses a quinolone drug SERS (Surface Enhanced Raman Scattering) detection method based on an improved silver nano-substrate and a spectral angle matching model. An improved Lee-Meisel method is adopted to synthesize silver nano sol with precisely controlled particle size, molecular adsorption is realized by utilizing electrostatic interaction of a positively charged quinolone drug and negatively charged silver nano particles, and a high-density Raman enhanced hot spot is formed after an agglomeration agent is added; the SERS spectrum is collected at the excitation wavelength of 785 nm and the integral time of 10 s, qualitative distinguishing of drugs is achieved by combining a spectrum angle matching model, and quantitative detection is achieved by constructing a standard curve through the linear relation between the characteristic peak intensity and the drug concentration logarithm. The detection limit of the four drugs is as low as 1.03-1.16 ppb, the classification accuracy rate reaches 100%, the method is obviously superior to existing similar methods, the detection matrix range is wide, such as animal food and dairy products, and universality and high sensitivity are both considered.

The invention relates to the technical field of tunnel guarantee cabins, in particular to a ventilation self-adsorption oxygen production tunnel guarantee cabin which comprises a tunnel guarantee cabin body, a protective cover is fixedly mounted on the upper surface of the top of the tunnel guarantee cabin body, and control equipment is fixedly mounted on the lower surface of the top of the tunnel guarantee cabin body. The device has the beneficial effects that the air filter cartridge is matched with the self-adsorption assembly, the air filter cartridge introduces air and filters out dust and impurities, the air compressor compresses the air and conveys the compressed air to the self-adsorption assembly, and the self-adsorption assembly is provided with an adsorption barrel I and an adsorption barrel II which alternately and periodically change the working pressure; oxygen, nitrogen and other gases in the air are effectively separated by utilizing the difference of the adsorption capacities of the ventilation pipe and the molecular adsorption material bed filled with molecular adsorption materials on different gas components in the air, high-concentration oxygen can be extracted from the air for enrichment, and the breathing requirements of refugees in the cabin are guaranteed.

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 provides a composite electrolyte for a secondary metal battery as well as a preparation method and application of the composite electrolyte. The preparation method comprises the following steps: firstly, adding soluble zinc salt into deionized water to prepare an aqueous zinc salt electrolyte, gradually adding the amino acid additive after the pH value of the aqueous zinc salt electrolyte is stable, continuously stirring until the amino acid additive is completely dissolved, and standing to obtain the aqueous composite electrolyte containing the amino acid additive. Ammonium radicals of amino acids exist in the form of-NH4 or-NH3 +, and carboxyl exists in the form of-COOH or-COO-; the-NH3 < + > can be electrostatically adsorbed on the surface of the zinc negative electrode to change an electric double layer structure and prevent free water molecules from being adsorbed and electrolyzed, and the-NH4, the-COOH and the-COO <-> can change a hydrated zinc ion solvation structure and reduce the number of coordination numbers and active water molecules released in a desolvation process; the composite electrolyte is far better than an existing composite electrolyte obtained by using an amino acid additive, and the performance of a secondary zinc metal battery is effectively improved.

The invention discloses a molecular adsorption coating for in-situ encapsulation of metal particles in graded FAU zeolite through ALD and a preparation method of the molecular adsorption coating, and belongs to the field of special functional coatings. The invention aims to solve the problems that a molecular sieve adsorption coating lacks effective chemical adsorption sites and is easy to desorb after adsorbing pollution molecules. According to the invention, metal particles are packaged in situ in graded FAU zeolite through an ALD technology, and a molecular adsorption coating with high adsorption binding force and stability is prepared; the coating comprises a functional filler and a binder, the binder is prepared silica sol, and the composite coating is formed through a spraying process; the coating has two action modes of physical adsorption and chemical adsorption when interacting with pollutant molecules, the adsorption capacity of the coating can be remarkably improved, and the long-term stable adsorption effect is achieved. The method can be applied to the fields of spacecraft thermal control systems, air purification, sewage treatment, pollution protection and the like, and has a wide application prospect.

Described are electrodes composed of a carbonaceous matrix with sulfurized carbon particles. These particles feature sulfur atoms covalently bonded to carbon atoms, internal pores, and sulfur molecules both adsorbed and contained within these pores. The structure includes electrically conductive filaments and particle agglomerates fused to a subset of these filaments, which possess specific length and width dimensions and extend as anchor segments to connect adjacent particles. Additionally, the electrode incorporates yarns made from a second subset of filaments, characterized by lengths and widths exceeding those of the initial filaments, spanning between the particle agglomerates. The resultant electrode shows unique electrochemical behavior that enhances its energy density over other carbonaceous sulfurized carbon materials.

The invention relates to the technical field of solar cells, in particular to a self-assembled monomolecular hole transport material, a preparation method and application thereof, a perovskite solar cell, a preparation method thereof and a photovoltaic module. The self-assembled monomolecular hole transport material provided by the invention has a structure as shown in a formula I. In the formula I, A1, A2 and A3 are respectively and independently anchor groups or hydrogen atoms; the anchoring groups are independently selected from phosphate groups respectively; g is selected from a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted acridinyl group, a substituted or unsubstituted phenothiazinyl group, and a substituted or unsubstituted phenoxazinyl group. The self-assembled monomolecular hole transport material provided by the invention has stronger anchoring binding capacity, conjugation in molecules is enhanced through the aromatic connection unit, and transport of carriers is facilitated; polyphosphonic acid anchoring in the self-assembled monomolecular hole transport material provided by the invention can enhance adsorption and uniformity of molecules, and a formed hole transport interface has better charge transport and defect passivation effects.

The invention discloses an aluminum alloy complex cavity diffusion welding method, which is characterized in that a uniform and compact organic molecule adsorption protection layer is formed on the surface of aluminum by completely immersing a cleaned blank in a diethylene glycol dimethyl ether solution for ultrasonic-assisted treatment. The protective film can effectively isolate air at normal temperature and prevent the oxidation film from regenerating; and in the initial stage of diffusion welding temperature rise, the aluminum alloy can be completely decomposed and volatilized, no impurity is left, and the high-activity clean aluminum surface is exposed. According to the method, diffusion welding is carried out under the conditions that the vacuum degree is high, the temperature is 500-560 DEG C and the pressure is 5-15 MPa in cooperation with a positioning tool system matched with the thermal expansion coefficient, aluminum atoms are fully diffused under the condition that no oxidation film hinders exist, and high-quality metallurgical bonding is formed. By means of the technical scheme, the problem that the welding rate is low due to an oxidation film on the surface of the aluminum alloy is successfully solved, meanwhile, the defects of ultrahigh vacuum equipment input and middle layer material introduction are overcome, and the manufacturing quality and production efficiency of complex aluminum alloy components are greatly improved.

This invention belongs to the field of SERS detection technology and relates to the application of an Ag / Bi4O5Br2 / Ni-Fe double hydroxide composite SERS substrate in the detection of CV in wastewater. First, a Bi4O5Br2 / Ni-Fe double hydroxide is prepared, and silver nanoparticles are loaded onto its surface using a liquid-phase chemical reduction method. This material combines the LSPR effect of silver nanoparticles with the interfacial coupling and multiple active sites of the Ni-Fe double hydroxide, enabling the regulation of interfacial charge transfer and enhancing molecular adsorption. Utilizing the excellent adsorption and enrichment properties of Bi4O5Br2, a highly efficient charge transport system is synergistically constructed from multiple components, improving the SERS chemical enhancement effect and amplifying the CV Raman signal. This invention overcomes the shortcomings of weak signals and insufficient stability of single substrates, achieving sensitive detection of trace CV in water. The substrate preparation process is simple, environmentally friendly, and highly practical, showing broad application prospects in the field of trace CV analysis in aquatic environments.

The present invention relates to a method for preparing silicon monoxide nanopowder, and belongs to the technical field of non-metallic powder material preparation. The present invention uses SiO2 aerogel powder with a three-dimensional continuous structure surface as raw material, adsorbs hydrogen molecules on the surface of the powdered SiO2 aerogel, and axially feeds an argon-excited inductively coupled plasma torch. The hydrogen molecules are excited by the argon plasma torch to form a highly active hydrogen-rich plasma, which undergoes a reduction reaction with the SiO2 aerogel powder having the characteristics of high specific surface area and high porosity. The generated silicon monoxide vapor is quenched by argon downstream of the reaction device to obtain highly dispersible silicon monoxide nanopowder. This method overcomes the defects of the traditional solid-solid reaction method for preparing silicon monoxide, which has a slow reaction rate and low raw material conversion rate, and at the same time solves the safety problems existing in the traditional method of producing silicon monoxide by hydrogen reduction, thereby greatly improving production efficiency and safety.

The present application relates to the technical field of IPDI synthesis, and particularly discloses a method for removing residual n-butanol in tail gas in a process for synthesizing isophorone diaminon-butyl carbamate by using a urea method, wherein the tail gas is obtained from: ammonia-containing tail gas obtained in the process for synthesizing isophorone diaminon-butyl carbamate by using the urea method, and tail gas obtained after an ammonium carbamate removal process; and the method for removing the residual n-butanol in the tail gas comprises the following steps: cooling the tail gas to 15-25 DEG C, and then adsorbing the n-butanol in the tail gas by using an adsorbent; and the adsorbent comprises molecular sieves, activated carbon and nano-polymer adsorption resin. By using the method, the content of n-butanol in the tail gas of isophorone diaminon-butyl carbamate is far lower than the industrial emission standard, no secondary pollution is caused, and the system safety is high.

The present invention belongs to the field of robot technology, in particular to a spraying robot; the present invention proposes a spraying robot, comprising: a machine base; a rotating base, a control box is installed on the rotating base; a fixed arm, fixedly connected to the rotating base; a first rotating arm, rotatably connected to the fixed arm; a second rotating arm, rotatably connected to the first rotating arm; a spraying assembly, connected to one end of the second rotating arm; an air suction assembly, used for adsorbing paint molecules floating in the air, the air suction assembly is arranged at the end of the second rotating arm, a vacuum pump is installed on the machine base, and the vacuum pump is connected to the air suction assembly through an air duct; the present invention provides an air suction assembly on the periphery of the spray assembly, and the air suction assembly can adsorb paint molecules in the nearby air, thereby solving the problem that paint molecules float in the air for a long time during the painting process, polluting the nearby air and affecting the health of workers.