27 results about "Adsorbed molecule" patented technology

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) detection, and relates to a preparation method of an Ag-Fe3O4 composite SERS substrate and application of the Ag-Fe3O4 composite SERS substrate in monitoring trace pollutants in water. Based on a plasma-semiconductor synergistic enhancement mechanism, cubic Fe3O4 nano particles with exposed {100} crystal faces are synthesized through a hydrothermal method, and the cubic Fe3O4 nano particles and Ag nano particles are subjected to ultrasonic-stirring to construct the Schottky heterojunction. The substrate creatively realizes dual-channel enhancement: the local surface plasmon resonance effect of Ag nanoparticles generates electromagnetic enhancement, the narrow band gap of Fe3O4 promotes photo-induced electrons to be transferred to Ag, an interface electric field is formed, and the polarizability of adsorption molecules is remarkably increased. When the probe is applied to detection of trace pollutants in a water body, the probe molecule RB is anchored on the surface of Fe3O4 through carboxyl, and the HOMO energy level of the probe molecule RB and the valence band top of Fe3O4 generate resonance charge transfer, so that the Raman cross section is improved. The detection limit of RB under 0.25 mW laser is increased by several orders of magnitude compared with that of a single Ag substrate.

The application relates to a functionalized glass for SERS detection and a preparation method thereof, characterized by the following steps: a. tetraethyl orthosilicate and oxalic acid are mixed into a 0.02-0.10 moL / L sol in anhydrous ethanol according to a molar ratio of 1:2-5, a stabilizer with a volume of 5-50% is added, and then the mixture is stirred and transferred into a four-necked flask; b. after being heated and stirred for 12-16 hours, an anhydrous ethanol emulsion of polystyrene small balls with a mass fraction of 5-20% and a volume of 6-18% is added; c. an anhydrous ethanol solution of a surfactant P123 with a total mass of 2-8% and a weight concentration of 3-8% is added, and then the mixture is stirred and aged; d. a wet film is prepared on a glass substrate, and then the wet film is dried and kept warm; (2) a nano-silver particle dispersion liquid with a concentration of 5-25 mg / mL is prepared; and (3) the glass substrate prepared in the step d is coated with the nano-silver particle dispersion liquid and dried. The application has the advantages of simple process and low cost; the surface of the porous structure silica nano-particles has a large number of nanoscale gap structures, which is beneficial to obtaining an enhanced silver nano-particle surface plasmon resonance electromagnetic field, and greatly enhances the Raman signal of the adsorbed molecules.

The invention belongs to the technical field of immunohistochemical detection, and discloses a modified composite sealing buffer solution as well as a preparation method and detection application thereof. The modified composite blocking buffer solution comprises a basic buffer system, a composite blocking agent, a nonionic detergent, an endogenous interferent blocking agent and an antibody stabilizer, wherein the basic buffer system provides a stable pH environment and ionic strength; the composite sealing agent firstly occupies a shielding site, and the background is lowered; the nonionic detergent destroys hydrophobic interaction, effectively elute and loosen adsorbed molecules, and promote dissolution of components with relatively strong hydrophobicity; the endogenous interferent blocker can be combined with a receptor firstly, so that non-specific combination of an antibody and the receptor is blocked, and the problem of specific background is solved; the antibody stabilizer can protect the activity of the detection reagent and maintain the stability, and the obtained modified composite sealing buffer solution and the kit thereof have the advantages of multiple cooperative sealing mechanisms, prospective blocking of endogenous interference, improvement of the stability, compatibility and high efficiency of the antibody and the like.

This invention relates to the field of spectroscopic testing technology, specifically to a membrane electrode, reaction cell, spectroscopic testing device, and their applications in an in-situ spectroscopic reaction cell under operating conditions. The membrane electrode comprises a light-transmitting ion-exchange membrane and two catalyst layers in contact with opposite sides of the ion-exchange membrane. At least one catalyst layer forms the catalyst-membrane reaction observation interface at its contact surface with the ion-exchange membrane. The other catalyst layer, opposite the catalyst-membrane reaction observation interface, has a light-transmitting aperture. This design exposes the catalyst-membrane reaction observation interface, allowing scattered light reflected from the interface to be collected by a spectrometer through the aperture. This enables in-situ observation of important conformational and microenvironmental information of adsorbed molecules at the catalyst-membrane reaction observation interface, thus providing an understanding of the reaction mechanism.

This invention belongs to the field of microbial electrochemistry and single-cell analysis technology, and specifically relates to a femtocoulomb-level single-bacterial surface charge imaging method and its application. This technology is based on electrochemiluminescence microscopy, utilizing the spontaneous enrichment of cationic ECL luminescent molecules by the electrostatic field of the negative charge on the bacterial surface, thereby non-destructively enhancing its ECL signal. By establishing a quantitative relationship between the ECL intensity enhancement ratio and the number of adsorbed molecules, and combining this with COMSOL simulation to determine the thickness of the luminescent layer, it achieves for the first time high-throughput, high spatiotemporal resolution dynamic quantitative measurement of femtocoulomb-level charges on the surface of a single living bacterium. The invented technology has high sensitivity, high resolution, and good biocompatibility, and can be used to reveal bacterial metabolic-charge regulation mechanisms, analyze synergistic electron transport pathways, and screen highly electroactive bacterial subpopulations in situ, providing a key tool for microbial electrochemical research.

The embodiment of the application discloses a kind of adsorption energy prediction method and related device, at least involve machine learning in artificial intelligence etc., can be applied to catalysis field, environmental catalysis, energy conversion, chemical production, biomedical scene etc..The method provided in the application embodiment can save computing time, improve prediction accuracy, speed up the development process of new materials.Moreover, the adsorption energy prediction method comprises: obtaining the target structure and element characteristics of the material to be predicted;According to the target structure of the material to be predicted, target distance information and target angle information are obtained;The target structure characteristics of the material to be predicted are determined based on the target distance information and the target angle information;The target structure characteristics and element characteristics are processed based on the preset machine learning model, and a prediction label is obtained, which is used to indicate the adsorption energy of the adsorption molecule in the material to be predicted.

The invention belongs to the field of chemical reagents, and particularly relates to a preparation method of alcohol-free acetone. The preparation method comprises the following steps: S1, carrying out primary adsorption by using a 4A molecular sieve and a 5A molecular sieve; s2, carrying out secondary adsorption by using a 4A molecular sieve, a 5A molecular sieve and a 10X molecular sieve; s3, adding sodium iodide into the acetone solution subjected to secondary adsorption treatment according to a solid-to-liquid ratio of 1: 4; s4, washing the crystal with absolute ether at least twice, then carrying out solid-liquid separation, and heating and distilling at 80-100 DEG C; s5, repeating S3 and S4, and carrying out secondary crystallization and crystal cleaning; s6, carrying out dehydration treatment on a crude product subjected to secondary distillation by using a 3A molecular sieve; and S7, carrying out rectification on the dehydrated crude product alcohol-free acetone in a temperature range of 80-100 DEG C. According to the technical scheme, before sodium iodide is added for adduct crystallization and purification, a step-by-step molecular sieve adsorption pretreatment process is introduced. According to the process, two molecular sieves with matched pore diameters and polarities are adopted, an industrial-grade acetone raw material is sequentially subjected to two times of adsorption treatment, and the purpose of synergistic purification is achieved by targeting different impurities.

The invention belongs to the technical field of gas detection pretreatment, and particularly relates to a multistage deep water removal pretreatment system for atmospheric trace gas detection. In order to efficiently remove water vapor and interference components in sample gas and solve the problem of interference of a high-humidity environment on quantitative analysis of trace gas, a four-stage cascade water removal structure is adopted, and the water removal limit of a single-stage technology is broken through through a physical synergistic mechanism of condensation (phase change dehumidification), membrane separation (selective permeation), cryogenic treatment (ultralow temperature capture) and adsorption (molecular sieve capture). The full-automatic deicing logic based on a fixed time period (non-temperature sensing) thoroughly avoids manual intervention.

The present invention relates to a flow cell for electrically controllable ad- and desorption of molecules from and into a liquid. Particularly, the present invention relates to a flow cell comprising a chamber comprising an inlet and an outlet which define therebetween a fluid path for the liquid and a volume for containing the liquid provided along said fluid path, the volume comprising a device comprising (a)two electrodes comprising a conductive surface, (b) a stationary phase between said two electrodes, wherein said stationary phase is not in direct contact with said electrodes, (c) a controller functionally associated with a power supply configured for applying and changing a voltage between said electrodes, wherein changing the voltage between said electrodes changes the affinity of molecules so as to adsorb said molecules to said stationary phase or desorb molecules from said stationary phase when said molecules are adsorbed to said stationary phase.

The application relates to the field of VOCs treatment, and discloses a VOCs adsorption molecular sieve, a preparation method and application thereof. The method comprises the following steps: 1) sequentially performing first ion exchange, calcination and second ion exchange on NaY molecular sieve to obtain NH4NaY molecular sieve; 2) performing hot-pressing treatment on the NH4NaY molecular sieve and water under the condition that the pressure is 0.1-0.7 MPa to obtain hot-pressing treated molecular sieve; and 3) performing acid treatment on the hot-pressing treated molecular sieve and acid. In step 1), the first ion exchange and the second ion exchange are performed under the condition that the pressure is 0.2-1.5 MPa. The method only needs to perform two ammonium ion exchanges and once calcination under the pressurized condition to prepare the NH4NaY molecular sieve with extremely high exchange degree, and further prepare the VOCs adsorption molecular sieve with excellent adsorption performance without long-time and multiple water vapor treatment at high temperature.

This invention relates to a method for preparing and applying an ordered silver nanoparticle@bismuth nanosheet@copper mesh array. First, bismuth nanosheets are grown on the surface of a copper mesh through an etching reaction using an immersion method. Then, silver nanoparticles are sputtered onto the surface of the bismuth nanosheets, resulting in an ordered silver nanoparticle@bismuth nanosheet@copper mesh array film. This array film is then immersed in a 4-p-aminobenzaldehyde (4-ABZ) solution, adsorbing 4-ABZ molecules onto the surface of the silver nanoparticle@bismuth nanosheet@copper mesh array as signal probe molecules. The silver nanoparticle@bismuth nanosheet@copper mesh array with adsorbed 4-ABZ molecules is then placed as a substrate in a packaging environment containing seafood, meat, or other meat-derived foods. The SERS signal intensity of the 4-ABZ molecules on the substrate surface is used to monitor the freshness of the meat-derived foods. As the freshness of the meat-derived foods decreases, the SERS signal of the 4-ABZ molecules on the substrate surface gradually decreases. Meanwhile, the silver nanoparticle@bismuth nanosheet@copper mesh array also exhibits excellent SERS signal response and signal uniformity for organic dye pollutant molecules such as rhodamine 6G and 4-aminobenzylthiophenol (4-ATP), and has important application prospects in the field of environmental monitoring.

The invention relates to the technical field of intelligent nanometer image analysis. The invention discloses an atomic-scale precision surface feature recognition and positioning method based on deep learning multi-modal image fusion, and the method can improve the recognition efficiency and accuracy of a plurality of adsorption molecules and defects on the surface of a crystal, and achieves the automatic recognition and precise positioning of the plurality of adsorption molecules and defects on the surface of the crystal. The method comprises the steps that a target fusion image is obtained, the target fusion image is formed by fusing a positive bias voltage scanning image and a negative bias voltage scanning image, and the positive bias voltage scanning image is an image of the surface of a crystal collected by a scanning tunneling microscope in a positive bias voltage mode; the negative bias scanning image is an image of the surface of the crystal collected by the scanning tunneling microscope in a negative bias mode; and inputting the target fusion image into an atomic-scale precision surface feature recognition and positioning model for positioning detection processing, and obtaining recognition and positioning results of various adsorption molecules and defects on the surface of the crystal.

The invention belongs to the field of surface enhanced Raman scattering, and discloses a method for constructing an SERS (Surface Enhanced Raman Scattering) substrate with high-density hot spots based on capillary force for detecting TNT (Trinitrotoluene). The SERS hot spot is constructed on the basis of a periodic Ag-plated silicon nanorod array, target molecules are adsorbed by utilizing a periodic Ag-plated silicon nanorod array substrate, and then nanorods are mutually pulled together by utilizing capillary force generated by solvent volatilization to form a cluster, so that the gap SERS hot spot is generated. The periodic Ag-plated silicon nanorod array is based on a single-layer polystyrene microsphere template, a silicon nanorod array is obtained in a mode of combining reactive ion etching and metal-assisted chemical etching, and an Ag film is deposited in a magnetron sputtering mode to obtain the Ag-plated silicon nanorod array. When TNT is detected, after the substrate adsorbs TNT molecules, the nanorods are pulled together directly by capillary force to generate gap SERS hot spots, so that the detection efficiency is improved. The method for constructing the hot spots based on the external stress is simple, convenient and efficient, and has higher sensitivity and reproducibility.

The present invention concerns a process for the separation of a gas mixture containing CO2 and at least one inert gaseous species, comprising (a) feeding the gas mixture into an adsorption column via a first inlet located at a first side of the column, wherein the adsorption column contains a solid CO2 sorbent loaded with H2O molecules and thereby desorbing H2O molecules and adsorbing CO2 molecules, to obtain a sorbent loaded with CO2 and an inert product stream; and then (b) feeding a stripping gas comprising H2O into the adsorption column via a second inlet located at a second side which is opposite to the first inlet, thereby stripping the sorbent and desorbing CO2 molecules and adsorbing H2O molecules, to obtain a sorbent loaded with H2O and the CO2 product stream, wherein the adsorption column is re-used in step (a) after being stripped in step (b). The invention also concerns an apparatus for performing the process according to the invention.

The utility model belongs to the technical field of lithium battery production auxiliary equipment, and particularly relates to a lithium battery NMP (N-Methyl Pyrrolidone) solution molecular sieve dewatering device which comprises a closed bin, a water inlet pipe is arranged in the closed bin, a molecular sieve filter pipe is arranged on the lower side of the water inlet pipe, a flow guide pipe is arranged on the lower side of the molecular sieve filter pipe, and the lower end of the flow guide pipe is connected with a distillation device. And an exhaust driving device is arranged on the distillation device. The molecular sieve filter tube is arranged, the 3-angstrom molecular sieve filter plate is arranged in the molecular sieve filter tube, the diameter of water molecules is about 2.6 angstrom, and NMP molecules are large (the diameter is about 5 angstrom), so that the 3-angstrom molecular sieve can better adsorb the water molecules, but cannot adsorb the NMP molecules, the water content of an NMP solution can be effectively reduced to below 10 ppm, and the water content of the NMP solution can be effectively reduced to below 10 ppm. An activated carbon adsorption filter plate is arranged, so that when the device exhausts air, the activated carbon adsorption filter plate can adsorb volatile NMP molecules, and the NMP molecules are prevented from leaking to the outside to cause harm to a human body.

The invention discloses a method for detecting amentoflavone in a juniper extract, and relates to the related field of juniper extract detection. The molecularly imprinted fiber test paper is combined with a photoacoustic acoustic microcavity detection technology, so that the detection of amentoflavone shows the comprehensive advantages of high sensitivity, high selectivity and quick response, on one hand, a specific recognition cavity is formed on the fiber surface by a molecularly imprinted polymer layer, and the specific recognition cavity is formed on the surface of the fiber; the test paper has an obvious selective adsorption effect on amentoflavone, and the interference of other polyphenol components in the juniper berry extract is obviously reduced; and on the other hand, the photoacoustic acoustics microcavity can amplify the photothermal conversion process of the adsorbed molecules, so that a weak thermal-acoustic signal is effectively enhanced, and the detection sensitivity far higher than that of a traditional spectrum method is obtained.

The invention belongs to the technical field of perovskite solar cells, particularly provides a co-adsorption hole transport layer material and a perovskite solar cell, and aims to solve the problems of energy level mismatch, high defect state density, serious non-radiative recombination loss and the like of a buried interface in an existing trans-broadband gap perovskite solar cell. Therefore, the technical bottlenecks of device open-circuit voltage attenuation, filling factor reduction and poor performance and stability are overcome. According to the invention, aromatic co-adsorption molecules are introduced and form the co-adsorption hole transport layer material together with carbazolyl phosphonic acid self-assembly hole transport layer molecules, so that the characteristics of a buried interface can be optimized, the comprehensive performance of a device can be improved, and meanwhile, a perovskite solar cell containing the material is provided.

The invention discloses a material surface adsorption site identification and structure generation method based on topological mapping. According to the method, an initial structure file and a geometrically optimized structure file of a material with consistent atomic composition and identical atomic numbers are obtained, a surface atom set of the material and an atomic number corresponding to each surface atom are determined on the basis of the initial structure file, and matching is performed through the identical atomic numbers in the two files; and determining real space coordinates of each surface atom in the geometrically optimized structure, identifying adsorption sites and corresponding space coordinates based on the space coordinates of the surface atoms, generating adsorption molecules at corresponding positions of the adsorption sites to obtain an adsorption structure, and finally outputting a standard structure input file based on the adsorption structure. Meanwhile, the method can be expanded and applied to scenes such as electrochemical interface simulation, gas sensing response mechanism analysis and resource conversion process optimization, and has important scientific research value and wide industrial application prospect in cross field research.

This invention discloses the application of ZIF-67 / nickel-doped plasma catalyst in atmospheric pressure plasma catalytic ammonia synthesis, and a method for atmospheric pressure plasma catalytic ammonia synthesis using the ZIF-67 / nickel-doped plasma catalyst. The Ni@ZIF-67 catalyst prepared in this invention has a high specific surface area, which improves the adsorption capacity for nitrogen, hydrogen, and ammonia products, thus promoting the hydrogenation reaction. The introduction of Ni increases the discharge power and energy efficiency in the reactor. The ZIF-67 framework adsorbs NH3 molecules, preventing them from being decomposed again by the external strong plasma, thereby increasing the net synthesis rate. The ammonia synthesis rate of this invention can reach as high as 289.45 µmol·g. ‑1 ·min- 1 The energy yield is as high as 1.83 g·kWh. ‑1 The efficiency of this invention is significantly higher than that of pure plasma and unmodified ZIF-67 systems. It significantly improves the ammonia synthesis rate and energy yield, and the catalyst has good structural stability, making it suitable for distributed green ammonia production.

A heat-resistant regenerable air filter assembly for air supply applications and a method (100) of regenerating the air filter assembly, the heat-resistant regenerable air filter assembly comprising a gas-permeable adsorption panel (1) mounted in a frame (2), the panel comprising a heat-resistant structure containing a heat-resistant porous adsorbent material for adsorbing molecular contaminants and configured to be regenerated by desorption, and the air filter assembly comprising a heat-resistant sealing material (3) between the adsorption panel and the frame, wherein the heat-resistant sealing material is a carbon fiber felt material arranged between the gas-permeable adsorption panel and the frame to fill the gap therebetween, thereby preventing the leakage of unfiltered air through the heat-resistant regenerable air filter assembly.

The invention provides a purification method of perfluoroisobutyl methyl ether. The purification method sequentially comprises the steps of primary metal ion removal, metal oxide colloid interception, deep metal ion removal, dehydration drying and rectification refining. Through a step-by-step synergistic impurity removal strategy, water-soluble salts, colloidal particles, heavy metal ions and trace moisture are removed in a targeted manner by adopting water washing, PTFE ultrafiltration membrane filtration, ion exchange resin adsorption, 3A molecular sieve drying, PTFE lining rectification and the like respectively, and finally an electronic-grade high-purity product is obtained. The method has the advantages of high purity, strict impurity control, corrosion resistance of equipment, stable and amplified process and the like, and is suitable for large-scale industrial high-purity preparation of perfluoroisobutyl methyl ether.

This utility model belongs to the field of sample pretreatment technology, specifically an automatic magnetic bead purifier, including a housing. Inside the housing is a movable frame with several magnetic rods fixedly mounted on it. Below the magnetic rods is a loading tray with multiple purification well groups. Each purification well group has its pores filled with a corresponding liquid. Each magnetic rod corresponds to one purification well group. The magnetic rods sequentially enter the pores of each purification well group, purifying the sample during this process. This utility model effectively improves the efficiency of sample purification. This magnetic bead purifier uses magnetic force to separate magnetic beads from adsorbed molecules, thereby achieving the purpose of separation and purification. It achieves reliable high recovery rates and consistent performance in a series of complex samples.

The invention relates to the technical field of shale gas development, and provides a graphitized shale adsorption capacity prediction method and device. The method comprises the following steps: acquiring geological feature information and pore feature information of graphitized shale in a target reservoir; selecting a target graphitized shale sample from the target reservoir, and establishing a kerogen molecular model and a shale mineral model corresponding to the target graphitized shale sample; establishing a graphitized shale model according to the kerogen molecular model and the shale mineral model; according to the graphitized shale model, establishing a corresponding graphitized shale slit model by utilizing the pore characteristic information; optimizing the graphitized shale slit model based on molecular simulation; and carrying out adsorption simulation on the optimized graphitized shale slit model by utilizing a preset adsorption molecule model to obtain the predicted adsorption quantity of the graphitized shale. According to the embodiment of the invention, the adsorption capacity of graphitized shale with different graphitization degrees can be accurately and efficiently predicted.

The application discloses a detection method of amentoflavone in juniper extract, and relates to the field of juniper extract detection. The application combines molecular imprinting fiber test paper with photoacoustic acoustic microcavity detection technology, so that the detection of amentofavone has the comprehensive advantages of high sensitivity, high selectivity and rapid response. On one hand, the molecular imprinting polymer layer forms a specific recognition cavity on the surface of the fiber, so that the test paper has obvious selective adsorption effect on amentofavone, and the interference of other polyphenol components in the juniper extract is significantly reduced. On the other hand, the photoacoustic acoustic microcavity can amplify the light-heat conversion process of the adsorbed molecules, so that the weak heat-acoustic signal is effectively enhanced, and the detection sensitivity is much higher than that of the traditional spectroscopy.

A method for manufacturing oxidized MXene according to a preferred embodiment may remove fluorine groups (F) on a surface of MXene and form OH functional groups through an oxidation process to effectively adsorb CO2 molecules and reversibly change electrical conductance according to gas concentration. In addition, a chemimemristor device based on the oxidized MXene (Mn+1Xn(OH)2) may simultaneously implement memristor and gas sensor functions in a single device, and maintain multiple levels of conductance depending on the concentration of adsorbed molecules, and implement, based thereon, reversible changes in conductance according to a concentration of CO2 and multi-level information processing through its characteristics of learning multi-level operations and molecular adsorption history to mimic the human sense of smell and synaptic plasticity of the brain.

The present invention relates to a medical implant comprising in its interior a device for electrically controllable ad- and desorption of molecules, said device comprising (a) two electrodes comprising a conductive surface, (b) a stationary phase between said two electrodes, wherein said stationary phase is not in direct contact with said electrodes, (c) a controller functionally associated with a power supply configured for applying and changing a voltage between said electrodes, wherein changing the voltage between said electrodes changes the affinity of molecules so as to adsorb said molecules to said stationary phase or desorb molecules from said stationary phase when said molecules are adsorbed to said stationary phase, and the use of said medical implant in the treatment of a medical condition.

This invention belongs to the field of new materials, specifically disclosing a hydrophilic-hydrophobic biphase Bi2WO6-C3N4 heterojunction catalyst, its preparation method, and its application. Hydrophilic C3N4 powder is prepared by calcining melamine, and then hexadecyltrimethylammonium bromide (CTAB), bismuth nitrate pentahydrate, and sodium tungstate dihydrate are simultaneously added. The hydrophilic-hydrophobic biphase Bi2WO6-C3N4 heterojunction catalyst is obtained using a hydrothermal method. This catalyst can be used as a photocatalyst for the photocatalytic reduction of CO2 in water vapor to CO and CH4. The hydrophilic-hydrophobic biphase Bi2WO6-C3N4 heterojunction catalyst prepared in this invention has a hydrophobic Bi2WO6 surface that can directly transfer high concentrations of gaseous CO2 molecules to the catalyst, while the hydrophilic C3N4 surface can efficiently adsorb H2O molecules. This results in the biphase photocatalyst exhibiting high CO2 photocatalytic reduction efficiency in water vapor. It also exhibits higher photocatalytic activity in water vapor than the hydrophilic Bi2WO6-C3N4 monophase catalyst, and the photocatalytic reduction rate of CO2 to CO and CH4 is higher.