31results about How to "Increase electron density" patented technology

The invention discloses a method for preparing tetrakis hydroxymethyl phosphonium sulfate by using high-concentration hydride, and belongs to the technical field of preparation of tetrakis hydroxymethyl phosphonium sulfate. The method for preparing tetrakis hydroxymethyl phosphonium sulfate by using the high-concentration hydride comprises the following steps: step 1, adding concentrated sulfuric acid and formaldehyde into a reaction kettle, uniformly stirring and mixing, then adding an organic catalyst and a modified surfactant, and continuously stirring to completely and uniformly mix reactants to obtain a mixed solution; 2, hydride is introduced into a reaction kettle through a pipeline and reacts with the mixed solution, a heating reaction is conducted, after the reaction is finished, the pipeline is closed, and a reaction solution is obtained; and 3, carrying out vacuum concentration treatment on the reaction liquid, and recrystallizing to obtain tetrakis hydroxymethyl phosphonium sulfate. The tetrakis hydroxymethyl phosphonium sulfate prepared by the method has excellent yield and purity.

The invention discloses a siloxane modified terpyridyl corrosion-resistant auxiliary agent and application thereof in preparation of an intrinsic metal corrosion-resistant epoxy resin coating, the structural formula of the siloxane modified terpyridyl corrosion-resistant auxiliary agent is # imgabs0, a terpyridyl structure is introduced, and the siloxane modified terpyridyl corrosion-resistant auxiliary agent has an efficient metal corrosion-resistant effect; the physical state of metal in the corrosion process can be changed by taking the strong coordination effect of terpyridyl as driving force, so that long-term corrosion prevention is realized; a terpyridyl structure is introduced into the epoxy resin, a rigid structure of a benzene ring and heterocyclic nitrogen atoms can form hydrogen bonds with side hydroxyl groups of the epoxy resin, the durability and corrosion resistance of the epoxy resin are greatly improved, and a siloxane structure on a main chain improves the flexibility of a molecular chain and improves the hydrophobicity of the epoxy resin.

The invention relates to the technical field of water treatment, and discloses a water treatment agent for oilfield reinjection water and a preparation method thereof. The water treatment agent for oilfield reinjection water is obtained by copolymerization of sulfonic imidazoline quaternary ammonium salt modified quinoline, Mannich base modified chitosan, acrylic acid and sodium hypophosphite. The water solubility and corrosion inhibition of imidazoline are improved through quaternization modification of imidazoline, quaternary ammonium salt imidazoline can be adsorbed on the metal surface, the corrosion rate is reduced, the quaternary ammonium salt imidazoline serves as a surface active agent, the infiltration and dispersion effects are achieved, and the descaling rate is increased; the sulfonic acid group improves the temperature resistance and prevents the generation of gel, and the strong hydrophilicity of the sulfonic acid group enables a molecular chain to fully stretch in water, so that the scale inhibition performance is improved; mannich base is introduced into chitosan, the acid solubility and temperature resistance of chitosan are improved, the coordination chelation effect of chitosan is enhanced through the conjugation effect of aromatic rings, and the corrosion inhibition effect is improved; various functional groups play a synergistic effect, so that the corrosion and scale inhibition effect is further enhanced.

The invention belongs to the technical field of electrode materials, and particularly relates to an MXene-based electrode material based on hydrazine hydrate gas expansion assisted pore forming and a preparation method and application thereof, and the preparation method comprises the steps: mixing an MXene-OH mixed solution with a bacterial cellulose dispersion liquid, carrying out vacuum suction filtration, and then carrying out vacuum constant-temperature drying to obtain an MXene-OH / BC film; laying an MXene-OH / BC film on the upper surface of the first ceramic wafer dropwise added with the hydrazine hydrate solution; after the MXene-OH / BC thin film is completely soaked by a hydrazine hydrate solution, laying a second ceramic wafer on the upper surface of the MXene-OH / BC thin film to obtain an intermediate with a sandwich structure, and performing vacuum heating to decompose hydrazine hydrate to generate gas expansion to obtain the MXene-based electrode material based on hydrazine hydrate gas expansion auxiliary pore forming; the MXene-based electrode material prepared by the invention can still maintain high capacity under high load.

The invention provides a supported catalyst and a preparation method thereof, and belongs to the technical field of hydrogenation catalysts, and the preparation method comprises the following steps: preparing a double-ligand nickel compound solution, dissolving tert-butyl modified bis (1-methylimidazolyl) ethane and 1, 10-phenanthroline in absolute ethyl alcohol, stirring, adding nickel salt, and uniformly stirring again to obtain the double-ligand nickel compound solution; the preparation method comprises the following steps: preparing an aluminum oxide-silicon oxide composite carrier, adding a caffeine solution and an alkali solution into a mixed solution of an aluminum precursor solution and a silicon precursor solution, uniformly stirring, gelatinizing, and carrying out two-step calcination to obtain the aluminum oxide-silicon oxide composite carrier, immersing the aluminum oxide-silicon oxide composite carrier into a double-ligand nickel compound solution, uniformly stirring, and drying to obtain the catalyst. And filtering, washing and drying to obtain the supported catalyst. According to the technical scheme provided by the invention, the purpose of efficient hydrogenation of the supported catalyst is achieved.

The invention discloses a p-Ga2O3 / n-Ga2O3pn junction diode and a preparation method thereof, and solves the problems that gallium oxide p-type doping is difficult, and a heterojunction diode is large in leakage current and low in withstand voltage. The gallium oxide homogeneous pn junction structure comprises cathode metal, a substrate and an n-type Ga2O3 epitaxial layer from bottom to top, a p-type NiO layer is arranged above the n-type Ga2O3 epitaxial layer, a p-type Ga2O3 material layer is arranged between the n-type Ga2O3 epitaxial layer and the p-type NiO layer, and a gallium oxide homogeneous pn junction is formed. The preparation method comprises the steps of epitaxial wafer cleaning, p-type Ga2O3 material layer preparation, cathode metal preparation, photoetching, p-type NiO film deposition, photoetching and anode metal preparation. N / P ion implantation is carried out on the upper portion of the gallium oxide epitaxial layer, Ga atoms in Ga2O3 are separated out and react again through high-temperature annealing to form the effective p-type characteristic, meanwhile, the effective p-type characteristic is combined with the p-type characteristic of p-type nickel oxide, p-type doping of gallium oxide is achieved through a simple process, the gallium oxide homogeneous pn junction is obtained, reliability is high, leakage current is small, and the gallium oxide homogeneous pn junction is suitable for large-scale production. The preparation method is used for preparing the p-Ga2O3 / n-Ga2O3pn junction diode with high voltage resistance.

The invention belongs to the technical field of electrode materials, and discloses an arene-synthesized graphene self-assembled porous carbon material and a preparation method and application thereof.The preparation method comprises the steps that 1, in the presence of protective gas, a solvent, a catalyst and optional fused salt, silicon dioxide aerogel serves as a template, arene serves as a reaction monomer, a reaction is conducted, and an arene-synthesized graphene self-assembled porous carbon material is obtained; a graphene self-assembled precursor material is obtained; and (2) carrying out carbonization treatment on the graphene self-assembled precursor material to obtain the arene synthesized graphene self-assembled porous carbon material. Aromatic hydrocarbon is combined with silicon-oxygen bonds on the surface of a silicon dioxide template, interaction of large pi bonds between graphene sheet layers is broken, and the problem that graphene materials are prone to stacking can be effectively solved; the graphene self-assembled porous carbon material prepared by the method is high in specific surface area, high in conductivity and excellent in capacitive performance.

The invention relates to a water-based photoresist stripping liquid for a display panel as well as a preparation method and application of the water-based photoresist stripping liquid. The water-based photoresist stripping liquid for the display panel comprises the following components in parts by weight, 0.1 to 0.5 part of a composite functional agent; 15 to 25 parts of organic amine; 10-20 parts of a polar solvent; 1-5 parts of a metal resist; and 30-50 parts of ultrapure water. An electron-rich water-soluble compound in the composite functional agent and an oxidation group of graphene oxide react through static electricity or hydrogen bonds to form a stable network structure, so that molecules are connected more tightly in a solution, the overall stability of the aqueous photoresist stripping liquid is better maintained, and the stripping efficiency of the aqueous photoresist stripping liquid is improved. The effects of reducing the volatilization of other components in the water-based photoresist stripping liquid and reducing the operation risk in the manufacturing process are achieved, and the service life of the water-based stripping liquid is prolonged.

The invention relates to synthesis of a novel nano material and application of the nano material in the field of supercapacitors, and discloses preparation and application of island-shaped nickel-vanadium-iron phosphide in-situ decoration nickel-vanadium-iron metal organic framework nano flower / foamed nickel. The invention aims to solve the problem that the existing super capacitor is insufficient in specific capacitance and energy density. The preparation method mainly comprises the following steps: 1, preparing nickel-vanadium-iron metal organic framework nanoflower / foamed nickel (NiVFe-MOF / NF) by a solvothermal method; and 2, preparing the heterojunction (NiVFe-P coated NiVFe-MOF / NF) of the nickel-vanadium-iron metal organic framework decorated by the island-shaped nickel-vanadium-iron phosphide (NiVFe-P) by an in-situ partial phosphorization method. The preparation method has the advantages of simplicity, low cost, high yield and the like. Due to the controllable heterojunction and abundant heterogeneous interfaces, the material shows excellent electrochemical characteristics. The specific capacitance is 2368.5 C g <-1 > when the specific capacitance is 1A g <-1 >, and the capacitance retention rate is still 90% after 10,000 cycles at the specific capacitance of 10A g <-1 >. In a two-electrode system, when the power density is 1.16 W kg <-1 >, the energy density of NiVFe-P-coated NiVFe-MOF / NF / / activated carbon / NF can reach 109.4 Wh kg <-1 >.

The present invention relates to a method for preparing a graphite phase carbon nitride composite nano silicon negative electrode material, and belongs to the technical field of lithium ion batteries. The present invention discloses a method for preparing a graphite phase carbon nitride composite nano silicon negative electrode material, which includes the following steps: A1: carbon nanotubes are placed in a mixed acid for infiltration treatment, and after solid-liquid separation, the solid is washed with deionized water to adjust the pH value to neutral, and then dried to obtain oxidized carbon nanotubes; A2: oxidized carbon nanotubes and modified silicon powder are added to a cyanuric acid solution, stirred and mixed to form a mixed solution, the mixed solution is poured into a melamine solution, stirred and placed to precipitate, and the filtered precipitate is washed with deionized water and dried to form a solid precipitate; A3: the solid precipitate is moved to a tubular furnace, argon gas is introduced, the temperature is increased and kept warm, and then cooled to obtain a graphite phase carbon nitride composite nano silicon negative electrode material. The cycle performance, service life and conductive performance of the silicon negative electrode material are improved by the above method.

The invention provides a sulfur-doped iron Fe-S-N-C cathode oxygen reduction catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts and preparation thereof. The preparation method comprises the steps that ZIF-8 of a regular dodecahedron frame structure and a nitrogen-containing ligand are mixed and pyrolyzed, a nitrogen-coated nitrogen-carbon substrate is formed, and the nitrogen-carbon substrate is of a regular dodecahedron frame structure; and performing chemical vapor deposition on the precursor iron salt, the precursor sulfur salt and the nitrogen-coated nitrogen-carbon substrate to obtain the sulfur-doped iron Fe-S-N-C cathode oxygen reduction catalyst. According to the invention, electrons around the Fe active center are reduced, the interaction with oxygenates is improved, the oxygen reduction process of four-electron transfer is promoted during subsequent application, meanwhile, the dissolution of Fe is reduced, and the cycling stability of the catalyst is improved.

The invention discloses a Schiff base functionalized silica aerogel / benzo (a) pyrene molecularly imprinted material and application thereof, pyrene is used as a virtual template molecule, and Schiff base functionalized silica aerogel is added; adding a functional monomer, a cross-linking agent and an initiator; and preparing the Schiff base functionalized silicon dioxide aerogel / benzo (a) pyrene molecularly imprinted material by adopting a surface imprinting polymerization method. The silicon dioxide aerogel is used as a base material, and the adsorption efficiency of benzo (a) pyrene is enhanced through the porous structure and high porosity of the silicon dioxide aerogel. Schiff base groups are introduced to form strong interaction with benzo (a) pyrene molecules, so that the adsorption capacity is further improved. And by combining a molecular imprinting technology, holes highly matched with benzo (a) pyrene are formed on the surface of the Schiff base functionalized aerogel, so that the material is endowed with high selectivity. Pyrene is used as a virtual template, so that the use of benzo (a) pyrene is avoided, and the environmental risk and the material cost are reduced.

This application discloses a method for preparing radiation-shielding mortar based on lead-zinc tailings. By crushing and density sorting lead-zinc tailings containing barite, the synergistic effect of high-density and low-density components is rationally utilized. On this basis, functional components such as rare earth tungsten composite oxide powder, boron-containing zirconium complex modifier, calcium aluminate, quasi-crystalline rare earth silicate powder, and graphene oxide dispersion are introduced to construct a radiation-shielding mortar system with high density, multi-energy-level radiation absorption capacity, and excellent mechanical properties. This effectively improves the mortar's attenuation capacity for various types of radiation such as gamma rays and neutron rays. At the same time, the quasi-crystalline structure and the micro-enhancing effect of graphene oxide significantly reduce the internal porosity of the material and improve the interfacial bonding state. Thus, while realizing the high-value utilization of lead-zinc tailings resources, it overcomes the problems of insufficient radiation shielding efficiency, difficulty in balancing mechanical properties and durability, and low level of industrial solid waste utilization in existing radiation-shielding mortars.

The present invention relates to an epoxy resin monomer and its preparation method and application. The preparation method comprises the following steps: synthesizing hydroquinone with multiple carbon-fluorine bonds; mixing the hydroquinone with multiple carbon-fluorine bonds with epichlorohydrin and tetrabutylammonium bromide, stirring and reacting at 90±2°C for 5.5 to 6.5 hours; removing excess epichlorohydrin to obtain a first reaction mixture; adding toluene and sodium hydroxide solution to the first reaction mixture, stirring and reacting at 90±2°C for 2.5 to 3.5 hours to obtain a second reaction mixture; washing the second reaction mixture with water until it is neutral, vacuum drying, and obtaining an epoxy resin monomer. The technical problem solved by the present invention is how to provide an epoxy resin monomer that can improve the thermal conductivity of the electronic packaging glue when applied to the electronic packaging glue, while not reducing the mechanical properties, insulation properties and weather resistance of the electronic packaging glue, so as to be more suitable for practical use.

This application relates to the field of catalyst technology, disclosing an electron-rich Pd nanocatalyst, its preparation method, and its application. The electron-rich Pd nanocatalyst comprises a sheet-like Mg(OH)₂ support and Pd nanoparticles uniformly loaded on the sheet-like Mg(OH)₂ support; wherein the thickness of the Mg(OH)₂ sheet is less than 2 nm; and the average particle size of the Pd nanoparticles is less than 4 nm. The preparation method includes dispersing the Mg(OH)₂ support in water, sequentially adding a palladium source and urea, refluxing at 55-65°C to obtain a precursor solution; adding a reducing agent to the precursor solution to carry out the reaction, collecting the solid deposit, washing, and drying to obtain the final product. This application, by regulating the electronic structure of the Pd nanoparticles, significantly increases the electron density on their surface, increasing the repulsion of reaction products, weakening the adsorption of reaction products on the catalyst surface, avoiding poisoning of the catalyst active sites, and improving the reactivity and selectivity of the Pd nanocatalyst for the hydrogenation of nitrile compounds at low temperatures.

The present invention relates to the technical field of etherifying agents, and discloses a solid cationic etherifying agent and a preparation method thereof. The present invention is carried out by adding organosilicon-modified gemini quaternary ammonium salt, pyridine-modified epoxy resin-modified quaternary ammonium salt, and 3-chloro-2-hydroxypropyltrimethylammonium chloride into a reactor for reaction, and vacuum drying is performed after the reaction is completed to obtain a solid cationic etherifying agent. In organosilicon-modified gemini quaternary ammonium salt, imidazole group inhibits the synthesis of ergosterol in fungal cell membrane, causing fungal death, and playing an antibacterial role; gemini quaternary ammonium salt has a better bactericidal effect than single-chain quaternary ammonium salt; in pyridine-modified epoxy resin-modified quaternary ammonium salt, pyridine group can interact with bacterial cell membrane, affect bacterial metabolism and cell structure, and play an antibacterial role; sulfur element can bind to protein and DNA in bacteria, inhibit enzyme activity and protein synthesis, and play a bactericidal role; sulfur element can also damage bacterial cell wall and cell membrane, accelerating cell death.

This invention relates to a plasma generator based on a dense microporous material catalysis, belonging to the field of low-temperature plasma technology. The plasma generator contains at least one discharge unit, which includes a first electrode, a microporous ceramic medium, and a second electrode. The first electrode is used to connect to a power source, and the second electrode is used for grounding. The microporous ceramic medium is used to adsorb gas molecules and active particles generated by the plasma discharge. This invention generates micro-discharge in a dense microporous medium, which has an extremely high specific surface area. When gas passes through, it is adsorbed onto the surface of the micropores in the medium. Similarly, active substances in the plasma are adsorbed onto the surface of the micropores in the medium. This improves the contact efficiency between short-lived, highly active particles and free radicals in the plasma and the reactants, promotes surface catalytic reactions, and improves the overall efficiency of the device.

The invention discloses a method for mineralizing marine diatom memory-losing shellfish poison through hydroxyl free radicals and an offshore device, and relates to marine shellfish poison treatment. The method comprises the following steps: culturing nitzschia in a control enclosure, extracting a nitzschia solution, pumping the nitzschia solution into a main pipeline, generating a high-concentration OH solution by OH solution generation equipment, injecting the high-concentration OH solution into a liquid / liquid mixing and dissolving device, cutting and mixing the OH solution and the nitzschia solution at a throat pipe, crushing the mixture into a huge amount of fine liquid drops, rapidly mineralizing memory-losing shellfish poison by OH at the moment of collapse of the liquid drops, and killing the nitzschia at the same time; one path of OH-killed algae is directly injected into the treatment I enclosure through a main pipeline I, the other path of OH-killed algae is introduced into a flocculation stirring tank through a main pipeline II to form flocs, the flocs are injected into the treatment II enclosure after forming flocs at a water conveying section, and the flocs are pumped into a flocs storage box after settling to the bottom of the enclosure; the sea water in the enclosure of the treatment I and the treatment II is pumped into a detection branch pipeline, and the concentration of memory-losing shellfish poison and the density of algae in the enclosure are monitored on line in real time. The device inhibits the transmission of the memory-losing shellfish poison along the marine food chain, and ensures the marine ecological safety.

The invention discloses an optical fiber probe and an optical fiber LIBS remote detection system and method, and relates to the technical field of laser detection, the optical fiber probe comprises a shell, and a collimating mirror, a focusing mirror and a quadric surface reflection cavity which are sequentially arranged in the shell along the laser incidence direction; the quadric surface reflection cavity comprises an upper end face and a lower end face, the lower end face is in contact with a sample, and the upper end face is in contact with the focus lens; the center of the lower end face is the focus of the focus lens, and the focus of the focus lens coincides with the first focus of the quadric surface reflection cavity. In the spectrum excitation stage, after being incident, laser is collimated by a collimating mirror and focused on the surface of a sample by a focusing mirror, plasma is excited and generated, and a quadric surface reflection cavity generates spatial constraint on the plasma; in the spectrum collection stage, radiation light generated by the plasma is directly converged and collected by the focus lens or reflected to the focus lens through the quadric surface reflection cavity to be converged and collected. According to the invention, the sensitivity of optical fiber LIBS detection is improved, and automatic focusing is realized.

This invention discloses a method for preparing gold-coated silica nanoparticles with an egg yolk shell structure. The method involves adding trisodium citrate solution, tannic acid solution, and sodium carbonate solution to a flask and stirring. After heating, chloroauric acid solution is added, and stirring continues while maintaining a certain temperature to obtain a gold nanoparticle solution. The gold nanoparticle solution, anhydrous ethanol, ammonia, and hexadecyltrimethylammonium bromide are then added to the flask, stirred, and resorcinol is added, with continued stirring. After the reaction, formaldehyde is added dropwise, followed by tetraethyl orthosilicate. The reaction product is washed multiple times with deionized water by centrifugation, dried overnight in an oven, calcined, and then washed multiple times with deionized water by centrifugation and dried in an oven to obtain gold-coated silica nanoparticles with an egg yolk shell structure. This one-pot sol-gel method is low-cost, simple, and rapid, producing gold particles with uniform morphology, a uniform silica shell thickness, and a large internal space within the egg yolk shell.

The present invention relates to an alkoxypropylamine compound and its application in organic sulfur absorption and removal. The compound has the following structural formula: #imgabs0# wherein R1 is a C1-6 alkyl substituent, and R2 is H or a C1-3 alkyl substituent. Compared with the prior art, the alkoxypropylamine compound of the present invention has a good deep removal effect on various types of sulfides, and the compound has stable chemical properties, is not easy to decompose, has a small bubble point vapor pressure, has little volatilization loss, is weak in alkalinity, and has light corrosion to equipment, and thus has a good industrial application prospect.

The invention belongs to the technical field of metal organic high-molecular polymers, and particularly relates to terpyridyl modified epoxy resin, a metal organic high-molecular material as well as a preparation method and application of the metal organic high-molecular material. The terpyridyl modified epoxy resin has a structure as shown in a formula (1): # imgabs0 #; the metal organic polymer material obtained by coordination of the terpyridyl modified epoxy resin and transition metal ions has a chain structure, the structure is stable, the formed metal terpyridyl structure has the characteristics of large conjugation and large electron density, and the catalytic performance of the metal organic polymer material can be effectively improved. The metal organic polymer material has good catalytic performance and shows huge potential in an experiment for reducing the curing temperature of the electrophoretic paint.

The invention provides a silsesquioxane porous material with a near-infrared light catalytic effect as well as a preparation method and application of the silsesquioxane porous material. The preparation method of the silsesquioxane porous material comprises the following steps: (1) in a solvent A, under the action of piperidine, enabling (3, 5, 5-trimethylcyclohex-2-alkenyl) malononitrile to react with a donor compound to obtain a D-A compound; (2) dissolving octavinyl silsesquioxane and the D-A compound obtained in the step (1) in a solvent B, adding a catalyst, uniformly stirring, and reacting; after the reaction is finished, cooling, filtering and washing to obtain a solid; and carrying out Soxhlet extraction on the obtained solid, and carrying out vacuum drying on the obtained solid to obtain the silsesquioxane porous material with the near-infrared light catalytic effect. The prepared silsesquioxane porous material has the advantages of wide absorption of near-infrared light, high light absorption and conversion efficiency, high catalytic activity, chemical stability and water stability.

The invention discloses a cassiterite collecting agent and a preparation method and application thereof, and belongs to the technical field of mineral separation. The cassiterite collecting agent is formed by coordinating and assembling the following cinnamon hydroxamic acid ligands and metal ions with the valence of more than two: # imgabs0 #, wherein M is a monovalent cation; in the formula, R is alkoxy with 1 to 5 carbon atoms or alkyl with 1 to 5 carbon atoms. The cassiterite collecting agent has very high targeted adsorption capacity on the cassiterite surface, meanwhile has excellent hydrophobic performance, particularly can achieve selective separation of cassiterite and gangue minerals such as tourmaline and garnet and enhanced flotation recovery of fine-fraction cassiterite under the condition of very low dosage, and is low in preparation cost, good in performance, simple in process and suitable for industrial production. The method is of great significance in improving efficient comprehensive recovery of cassiterite resources and is beneficial to further popularization and application.

The invention relates to the technical field of electrode materials, and discloses a nickel single atom with a coordination structure and a preparation method and application of the nickel single atom with the coordination structure, and the general formula of the nickel single atom with the coordination structure is NiNxSy, wherein 3 > = x > = 1, 3 > = y > = 1; x and y are integers. The preparation method comprises the following steps: dispersing the Ni / ZIF-8 compound in a solvent in an inert gas atmosphere, mixing with a sulfur source, and pyrolyzing at 900-1200 DEG C for 1-4 hours to obtain the nickel monoatom with the coordination structure. The nickel monatomic with the coordination structure provided by the invention changes an electronic structure around a central Ni atom, so that the electron transfer capability of the nickel monatomic is enhanced, and electron transfer is promoted; and rich active sites are also provided, so that the polysulfide can be better anchored, the catalytic performance is improved, and the interaction between the nickel monatomic material with the coordination structure and the active substance sulfur and the oxidation-reduction reaction of the positive electrode of the lithium-sulfur battery are optimized.

The invention discloses a corrosion inhibitor for oilfield produced water, and relates to the technical field of petrochemical engineering, the corrosion inhibitor is composed of a corrosion inhibitor main body and an auxiliary agent, the corrosion inhibitor main body is at least one of a compound 1 and a compound 2, the compound 1 is 2, 6-bis (1-phenyl-2-p-methylphenylethylamino)-3-cyano-4-methylpyridine, the compound 2 is 2, 6-bis (1-phenyl-2-p-methylphenylethylamino)-3-cyano-4-methylpyridine, and the auxiliary agent is 2, 6-bis (1-phenyl-2-p-methylphenylethylamino)-3-cyano-4-methylpyridine. The compound 2 is 2-chloro-3-cyano-4-methyl-6-(alpha, alpha-dimethyl benzylamino) pyridine, and the compound 2 is 2-chloro-3-cyano-4-methyl-6-(alpha, alpha-dimethyl benzylamino) pyridine. The corrosion inhibitor disclosed by the invention comprises the main components of two aminopyridine compounds, the electron density of molecules is effectively improved by N atoms in the molecular structure and electron donating groups connected to pyridine rings, and the corrosion inhibitor can be firmly adsorbed on the metal surface to form a compact protective film. In addition, hydrophobic groups are introduced into molecules, and the close arrangement of the molecules of the hydrophobic layer is realized by accurately regulating and controlling the ratio of the two compounds. The corrosion inhibitor prepared by taking the compound combination as a main body shows a stable corrosion resistance effect under high-temperature and high-salt conditions, and is particularly suitable for treating oilfield produced water.

The present application discloses a kind of condensed ring aromatic hydrocarbon hydrogenation catalyst and its preparation method and application.The catalyst includes porous carrier, active metal component and auxiliary component, the active metal component is selected from at least one of La system, group VIB or group VIII metal element, the auxiliary component is selected from at least one of group IIA metal element, the catalyst, with X-ray photoelectron spectroscopy characterization, metal component M a+ (a>1) is reduced to M (a‑1)+ The ratio of M a+ Total reduction of at least 80%, preferably at least 90%.The catalyst of the present application is used for condensed ring aromatic hydrocarbon hydrogenation reaction, especially naphthalene and naphthalene hydrogenation reaction, with the characteristics of improving the conversion rate of reactants, the selectivity of target product.

The invention belongs to the technical field of preparation of carbon quantum dots, and discloses a preparation method of nitrogen-sulfur co-doped fluorescent carbon quantum dots with high quantum yield. The preparation method comprises the following steps: dissolving sodium lignin sulfonate in a deep eutectic solvent composed of choline chloride ChCl and p-toluenesulfonic acid PTA, carrying out a heating reaction, and after the reaction is finished, generating nitrogen-sulfur co-doped fluorescent carbon quantum dots N, S-CQDs; the deep eutectic solvent composed of the choline chloride ChCl and the p-toluenesulfonic acid PTA is a deep eutectic solvent ChCl / PTA composed of the choline chloride ChCl and the p-toluenesulfonic acid PTA in a molar ratio of 1: 1. The nitrogen-sulfur co-doped fluorescent carbon quantum dot with high quantum yield prepared by the preparation method provided by the invention has the quantum yield of 56% or more, the fluorescence intensity is the best under ultraviolet irradiation, and the carbon quantum dot has a highly ordered graphitized structure.

The invention relates to a system and a method for obtaining large-volume plasma by utilizing micro-cavity discharge. The system comprises a vacuum discharge chamber, a positive high-voltage direct-current power supply, a negative high-voltage direct-current power supply, a vacuum pump, a gas source, a mass flow meter, a barometer and the like, a positive bias anode and a micro-cavity cathode are arranged in the vacuum discharge chamber; the positive bias anode is formed by distributing air holes and molybdenum needles on a molybdenum sheet; according to the micro-cavity cathode, a ceramic sheet is clamped between two layers of molybdenum sheets, and a micro-cavity is formed in a cathode plate of a three-layer structure. The positive electrode of the positive high-voltage direct-current power supply is connected with the molybdenum sheet and the molybdenum needle of the positive bias anode and provides positive bias voltage for the positive bias anode; the anode of the negative high-voltage direct-current power supply is connected with an anode molybdenum sheet in the micro-cavity cathode through a current-limiting resistor R2, and the cathode of the negative high-voltage direct-current power supply is connected with a cathode molybdenum sheet in the micro-cavity cathode through a current-limiting resistor R1; and the negative high-voltage direct-current power supply is used for providing negative high voltage for the micro-hollow cathode. According to the invention, the generation volume of high-density plasma is increased, and the discharge volume can reach more than 10 cm < 3 >.

The invention relates to the technical field of hydrogen-sensitive materials, and discloses a hydrogen-sensitive color-changing film based on nanomaterials and a preparation method thereof. Sodium tungstate is used as a tungsten source and sodium metavanadate is used as a vanadium source. In an acidic environment, n-propanol is used as an organic inducing agent, and carbon nanotubes act together to produce a hydrothermal reaction to obtain a precursor; the precursor is calcined in an argon atmosphere to obtain a V-doped WO3-carbon nanotube composite material having a unique nanostructure and a higher specific surface area; the V-doped WO3-carbon nanotube composite material is used as a hydrogen-sensitive material, and is stirred and mixed with vinyl silicone rubber and a dispersant, and after refining and molding, a hydrogen-sensitive color-changing film based on nanomaterials is obtained. V-doped WO3 has a high specific surface area and abundant reaction sites, which can increase the adsorption capacity of hydrogen and improve the selectivity of hydrogen. Carbon nanotubes have excellent mechanical properties, which effectively improve the mechanical properties of the film. The prepared hydrogen-sensitive color-changing film has the characteristics of high sensitivity and short response time.