56 results about "Indium nitrate" patented technology

The invention provides a functional filler, a preparation method thereof, an inorganic thermal control coating and application, and belongs to the technical field of coatings. The preparation method of the functional filler comprises the following steps: by taking a zinc acetate aqueous solution as a raw material, adding indium nitrate and aluminum nitrate, stirring and dissolving, then sequentially adding a complexing agent and a stabilizer, heating in a water bath to form transparent gel, and finally sintering at high temperature. According to the preparation method, a sol-gel method and a high-temperature sintering process are adopted to dope an indium element and an aluminum element into zinc oxide to prepare indium-aluminum co-doped zinc oxide, and then the indium-aluminum co-doped zinc oxide is used as a functional filler to be added into inorganic silicate resin to prepare the inorganic thermal control coating. The aluminum element and the indium element can synergistically act to improve the temperature resistance of the coating, so that the inorganic silicate coating with protection and thermal control effects is obtained, can be used on the surface of a spacecraft and has good thermal control and temperature resistance effects.

The application discloses an indium-based oxide catalyst, which is prepared by the following method: step one, adding indium nitrate, isophthalic acid, DMF, acetonitrile, imidazole and nitric acid into a reaction kettle, reacting at 80 DEG C for 12 hours, then heating to 100 DEG C and reacting for 24 hours, washing with DMF and anhydrous ethanol respectively, and vacuum drying for 12 hours to obtain an In-MOF precursor; step two, keeping the In-MOF precursor under the condition of nitrogen atmosphere and 200-600 DEG C for 4 hours, and naturally cooling to room temperature to obtain the indium-based oxide catalyst. Most of the prepared indium-based oxide catalysts still retain the corresponding three-dimensional hierarchical porous framework structure of the original MOF; the indium-based oxide catalyst contains highly dispersed metal active sites inside, effectively reduces the aggregation of metal oxides or metal elements, and thus exhibits more excellent catalytic activity; the organic ligand isophthalic acid generates a large amount of carbon material through pyrolysis under an inert atmosphere, greatly improving the conductivity of the indium-based oxide catalyst.

The application discloses a synthesis method of nitrogen-doped carbon-coated In2O3-CdSe hexagonal nanorod, and comprises the following steps: dissolving indium nitrate tetrahydrate and terephthalic acid in an organic solvent, transferring the mixture into a reaction kettle after ultrasonic treatment for 10 minutes, heating the mixture for a period of time, centrifuging and collecting the product after the reaction is completed, cleaning the product with ethanol, and drying the product to obtain a MIL-68-In precursor with a hexagonal nanorod structure; dispersing the MIL-68-In precursor in an organic solvent containing dissolved cadmium acetate, transferring the mixture into a reaction kettle after ultrasonic treatment for 10 minutes, heating the mixture for a period of time, centrifuging and collecting the product after the reaction is completed, cleaning the product with ethanol for several times, drying the product, and using the product for further use, and then calcining the synthesized sample and selenium powder in a tube furnace to obtain In2O3-CdSe@N-C. The application synthesizes the In2O3-CdSe@N-C hexagonal nanorod photocatalyst through a solvothermal and calcination method, and the synthesized photocatalyst has higher photocatalytic activity than the MIL-68-In.

The invention provides a preparation method and application of a plasma-assisted catalyst for preparing methanol through CO2 hydrogenation, and belongs to the field of catalysts. Raw materials adopted by the method comprise biomass, metal salt and a precipitator, the molar ratio of the biomass to the metal salt is (0.05-1): 1, the biomass is one of chitosan, hyaluronic acid and alginic acid, and the metal salt is one or more of indium nitrate, cobalt nitrate, zirconium nitrate, zirconyl nitrate, titanium sulfate and aluminum nitrate; the catalyst is subjected to nitrogen doping and / or more oxygen vacancy metal interfaces are formed through combination of coprecipitation and plasma treatment, so that the carbon dioxide adsorption and activation capacity and the overall hydrogenation efficiency of the catalyst in the process of preparing methanol through carbon dioxide hydrogenation are effectively improved.

The invention discloses a nitrogen-doped graphene composite material and a preparation method thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: S1, preparing a nitrogen-doped graphene material; s2, dissolving indium nitrate, 2-amino-benzothiazole and the nitrogen-doped graphene material in a DMF (Dimethyl Formamide) aqueous solution, carrying out hydrothermal reaction, cooling to room temperature, washing and freeze-drying to obtain a nitrogen-doped graphene / indium-based MOF (Metal Organic Framework) material; and S3, adding the nitrogen-doped graphene / indium-based MOF material into the lead acetate dispersion liquid, carrying out ultrasonic treatment, stirring and uniformly mixing, dropwise adding a 2g / L sodium hydroxide solution into the mixed liquid in a stirring state until the solution Ph is 8, then carrying out freeze drying, putting a dried sample into a tubular furnace, and calcining in an inert atmosphere to obtain the nitrogen-doped graphene composite material. When the prepared composite material is applied to the negative electrode of the lead-acid battery, the hydrogen evolution side reaction in the charging process of the negative electrode plate can be remarkably reduced, and the electrochemical performance of the battery is improved.

The invention discloses a preparation method of an Eu-Tb-In-MOF material based on a dual fluorescence emission source type, and the preparation method specifically comprises the following steps: under a closed condition, uniformly mixing terbium nitrate hexahydrate, europium nitrate hexahydrate, indium nitrate pentahydrate, an organic ligand, N, N-dimethylformamide and acetonitrile, then adjusting the pH value of a mixed solution, and carrying out solvothermal reaction, washing, filtering and drying to obtain the Eu-Tb-In-MOF material. The invention also discloses an application of the Eu-Tb-In-MOF material in identification of heavy metal ions Cr in a water environment. The Cr (VI) ions in the water environment are detected through fluorescence quenching sensing, excellent high selectivity is shown, and interference of other single and mixed anions and cations in the water environment can be resisted.

The invention discloses a preparation method of an efficient bionic photocatalytic material. The preparation method comprises the following steps: soaking rose leaves in a glutaraldehyde solution; soaking the rose leaves in a hydrochloric acid solution; the pretreated rose leaves are placed in a tetrabutyl titanate solution, and a precursor material A is obtained; oxidizing cobalt hydroxide into cobalt oxide in a muffle furnace to obtain a precursor material B; depositing indium nitrate on the precursor material B to obtain a precursor material C; calcining the precursor material C in a muffle furnace, removing part of the biological template, and converting the remaining biological template into a biological carbon carrier; placing the carbon-based bionic photocatalyst in an N2 inert gas protective atmosphere, and calcining the carbon-based bionic photocatalyst in a tubular furnace; and taking out the calcined material, cooling to room temperature, and cleaning the cooled material for multiple times to obtain the bionic photocatalyst. The preparation method of the efficient bionic photocatalytic material is used for efficiently degrading organic matters in water.

This invention discloses a defect-state indium oxide photothermal catalyst, its preparation method, and its application. The catalyst is indium oxide (In₂O) containing oxygen vacancies. 3‑x The catalyst exhibits a co-doped cubic and hexagonal crystal structure. The oxygen defects include oxygen vacancies and unsaturated In(III) sites associated with these vacancies. The preparation method involves a solvothermal reaction of indium nitrate and urea in a 50-95 v / v% ethanol aqueous solution to obtain the precursor c / h-InOOH. The precursor is then calcined to obtain c / h-In2O3. Finally, c / h-In2O3 is heat-treated with a reducing agent to construct oxygen defects. This invention, through crystal doping and the synergistic structure of oxygen defects in In2O3, enables the catalyst to possess full-spectrum absorption capabilities, more efficient carrier separation capabilities, and photothermal synergistic capabilities, thereby improving the efficiency of photothermal catalytic degradation of PFOA.

The invention belongs to the technical field of wave-absorbing materials, and particularly relates to an InNi3C0.5 / Ni-coated C composite wave-absorbing material and a preparation method thereof. The preparation method comprises the following steps: preparing a Ni-MOFs precursor by taking nickel nitrate and terephthalic acid as raw materials and adopting a solvothermal method, doping indium nitrate with different concentrations into the precursor through an ion exchange strategy to prepare an In / Ni-MOFs composite material, and carrying out high-temperature carbonization treatment on the In / Ni-MOFs composite material to finally obtain the spherical porous composite material. The spherical structure of the composite material provided by the invention can provide an axial carrier channel, promote jumping and migration of electrons, form an effective conductive network and enhance the wave absorbing performance. The problems of poor impedance matching, high density and high filling rate of the traditional carbide are solved, the preparation process is simple, the raw material cost is low, and the prepared wave-absorbing material has the characteristics of strong absorption, wide band and low thickness.

The invention relates to a ZnO / In2O3 heterojunction photocatalyst as well as a preparation method and application thereof. The method comprises the following steps: (1) ultrasonically dissolving KOH in absolute ethyl alcohol to form a solution A; dissolving zinc acetate in absolute ethyl alcohol to obtain a solution B; dropwise adding the solution A into the solution B at room temperature, stirring, adding ethyl acetate, continuously stirring, washing and centrifuging the prepared ZnO QDs-containing solution with ethanol and water respectively, and re-dispersing in absolute ethyl alcohol to obtain synthesized ZnO quantum dots; (2) dissolving indium nitrate and polyvinylpyrrolidone in a mixed solution of ethanol and N, N-dimethylformamide, and stirring at room temperature; putting the stirred solution into an electrostatic spinning instrument; drying the obtained fibers, and preserving heat in an air atmosphere to obtain In2O3 nanofibers; and (3) performing ultrasonic mixing on the ZnO quantum dots and the In2O3 nanofibers, and then performing centrifugal drying to obtain the ZnO QDs / In2O3 nanofiber heterojunction optical composite material catalyst. The photocatalytic performance is remarkably improved.

The application discloses a kind of synthesis method for preparing structure is hydrangea-like MnCdS / In2S3 / NiAl-LDH photocatalyst by two-step hydrothermal method, belong to composite material and photocatalytic technical field.Sulfaceticamide (TAA), cadmium acetate dihydrate ((CH3COO)2Cd·2H2O), manganese acetate tetrahydrate (Mn(CH3COO)2·4H2O), indium nitrate 4.5 hydrate (In(NO3)3·4.5H2O), nickel nitrate hexahydrate (Ni(NO3)2·6H2O), aluminum nitrate nonahydrate (Al(NO3)3·9H2O), ammonium fluoride (NH4F), urea (CO(NH2)2) are used as raw materials, monomer is treated by two-step hydrothermal method, and hydrangea-like MnCdS / In2S3 / NiAl-LDH composite photocatalyst is obtained.The surface morphology, microstructure and photocatalytic activity are determined, and the product performance is greatly improved in the photocatalysis of degrading organic pollutants crystal violet and photolysis water to produce hydrogen.

The present application relates to a kind of indium-poor tungsten bronze phase mosaic block assembled composite material and its preparation method, and the indium-poor tungsten bronze phase mosaic block assembled composite material is by In 0.02 WO3 is formed by WO3 compound, there are many tunnels consisting of the interval between tungsten and oxygen atom in the indium-poor tungsten bronze phase mosaic block assembled composite material, and indium ions are randomly distributed on both sides of the tunnel center position.Method: step one, create supersaturated sodium sulfate solution environment;Step two, in the supersaturated sodium sulfate solution environment obtained in step one, add indium nitrate, add NH4Cl hydrothermal reaction;Step three, centrifugation;Step four, sodium tungstate, oxalic acid and ammonium chloride are sequentially added to deionized water, drop into HCL, add the product of step three hydrothermal reaction, centrifugation and washing, finally the indium-poor tungsten bronze phase mosaic block assembled composite material is prepared.The material has high sensitivity to acetone gas, and the working temperature is low.

The application discloses a preparation method and application of Yb and Er co-doped S-type heterojunction, and the Yb and Er co-doped S-type heterojunction is synthesized by using indium nitrate, silver nitrate and thioacetamide as raw materials, through a hydrothermal method, AgIn5S8 is synthesized by etching Ti3AlC2 through HF, Ti3C2T x MXene. Bismuth nitrate and potassium chloride are used as raw materials, a certain amount of ytterbium nitrate, erbium nitrate, AgIn5S8 and MXene are added, then a Yb and Er co-doped BiOCl / MXene / AgIn5S8 composite material is synthesized through an in-situ hydrothermal growth method, and the catalyst is applied to degradation of wastewater containing tetracycline hydrochloride, can realize effective degradation of antibiotic wastewater under visible light and near-infrared light respectively. Meanwhile, the catalyst has full-spectrum response performance, can fully utilize clean energy solar energy, and realizes efficient purification of water pollutants.

The invention discloses a preparation method and an application of a ZnIn2S4-based heterojunction material. The preparation method comprises the following steps: dissolving indium nitrate, zinc nitrate and thioacetamide into a solvent, carrying out solvothermal treatment, cooling, centrifuging, and drying to obtain the ZnS / ZnIn2S4 material. The composite material is obtained through a one-step water method, and preparation is simple. The heterojunction material is obtained through a one-step method, a tighter interface is achieved, an interface electric field is constructed, separation of electron-hole pairs is promoted, electron transmission is facilitated, the photocatalytic reaction efficiency is improved, and then the photocatalytic activity is improved. When the photocatalyst is applied to photocatalytic benzyl alcohol oxidation, the photocatalytic efficiency of the photocatalyst is remarkably improved, and controllable product selectivity is realized. According to the method, benzyl alcohol is almost completely converted within 1 h, the reaction rate is as high as 10 mmol g <-1 > h <-1 >, the selectivity of obtained benzaldehyde is 98.2%, and in addition, the selectivity of C-C products is 86.2%.

The application relates to an indium-doped copper oxide electrode for electrocatalytic reduction of CO2 and a preparation method thereof, and belongs to the technical field of electrocatalytic reduction. Copper chloride and indium nitrate are used as raw materials, sodium hydroxide is used as a precipitant, a precursor is obtained through co-precipitation, the precursor is decomposed through heating, centrifugal washing and vacuum drying, and an indium-doped copper oxide catalyst is obtained, ink is prepared by mixing water, ethanol and a naphthol solution, the ink is uniformly coated on carbon paper and dried to obtain the indium-doped copper oxide electrode. The prepared indium-doped copper oxide electrode has high catalytic activity and good stability, indium atoms are doped in the copper oxide crystal lattice, the kinetics of the catalyst is improved, the desorption of carbon monoxide from the surface is accelerated, the doping of indium can improve the stability of the catalyst and inhibit the generation of hydrogen, a competitive product. The operation process is simple, raw materials are easy to obtain, no pollution is caused, no expensive equipment is needed, and the application has a wide application prospect.

The application discloses a preparation method of a hydrogen molybdenum bronze-sulfur indium zinc composite photocatalyst and belongs to the technical field of nanometer material preparation. Sodium molybdate is used as a precursor, is dispersed in water, nitric acid is added, and molybdenum trioxide is obtained through aging; then the molybdenum trioxide is dispersed in water, zinc sulfate, indium nitrate and thioacetamide are added, and MoO3-ZIS is obtained through hydrothermal reaction; the obtained MoO3-ZIS is added into an aqueous nitric acid solution, and H x MoO3-ZIS composite is generated through irradiation. The preparation method of the hydrogen molybdenum bronze-sulfur indium zinc composite photocatalyst is simple in preparation process, convenient in operation, high in yield, and stable in product performance.

The application belongs to the field of gas sensors, discloses a kind of indium oxide composite material based on palladium doping and its preparation method and application, its preparation process is to utilize indium nitrate, anhydrous ethanol, ammonia, deionized water to prepare indium oxide material, then doping palladium ion in indium oxide solution to obtain palladium ion doped indium oxide solution, using sodium borohydride reduction, centrifugal to obtain palladium doped indium oxide composite material, then prepare into gas sensor.The application can effectively solve the problems of high activation energy required for pure indium oxide gas sensor reaction and lack of selectivity of pure semiconductor surface to sulfide by improving the design of key process flow of preparation method, and realizes the detection of dimethyl disulfide gas.

The invention discloses a preparation method of a hydrogen molybdenum bronze-sulfur indium zinc composite photocatalyst, and belongs to the technical field of nano material preparation, the preparation method comprises the following steps: using sodium molybdate as a precursor, dispersing in water, adding nitric acid, and aging to obtain molybdenum trioxide; dispersing molybdenum trioxide in water, adding zinc sulfate, indium nitrate and thioacetamide, and carrying out hydrothermal reaction to obtain MoO3-ZIS; and adding the obtained MoO3-ZIS into a nitric acid aqueous solution, and carrying out illumination to generate the HxMoO3-ZIS compound. The preparation method of the hydrogen molybdenum bronze-sulfur indium zinc composite photocatalyst is simple in preparation process, convenient to operate, high in yield and stable in product performance.

The invention relates to the technical field of heterojunction photocatalytic materials, in particular to a high-defect-concentration heterostructure In2O3 / ZnS material and a preparation method and application thereof. The method comprises the following steps: dissolving zinc nitrate and indium nitrate in deionized water, and adding urea into the solution for hydrothermal reaction to obtain Zn-In LDH powder; the preparation method comprises the following steps: dispersing Zn-In LDH powder in deionized water, dissolving thioacetamide in a solution, and carrying out a hydrothermal reaction to obtain light yellow In2O3 / ZnS powder; and calcining the In2O3 / ZnS powder in an Ar gas atmosphere to obtain the In2O3 / ZnS heterojunction material. The preparation raw materials are easy to obtain, the cost is low, the process is simple, and the photocatalytic performance of the material is improved; the In2O3 / ZnS heterojunction material with relatively high defect concentration and relatively high crystallinity is prepared, and the photocatalytic hydrogen evolution rate reaches 882.42 [mu] mol * h <-1 > * g <-1 >.

The invention discloses a method for preparing an indium oxide powder material, which comprises the following steps: with indium nitrate and 1, 4-naphthalic acid as reaction raw materials, adding a surface modifier accounting for 0-20% of the total mass of the reaction raw materials into an organic solvent system to prepare an indium-based metal organic framework material; separating, washing and drying the indium-based metal organic framework material to obtain an indium-based metal organic framework precursor; and annealing the indium-based metal organic framework precursor to obtain the indium oxide powder material. According to the preparation method, 1, 4-NDC is selected as an organic bridging ligand, the concentration of the 1, 4-NDC and the dosage of a surface modifier are regulated and controlled, an In-MOF structure with a special morphology can be formed through induction, and the morphology can be kept intact through adjustment of the annealing temperature and parameters; the morphology controllability of the indium oxide particles allows crystal face exposure and charge transfer paths of the indium oxide particles to be customized, and the performance of the indium oxide particles in optoelectronic equipment, energy storage and photocatalysis is optimized.

The invention relates to the technical field of lithium ion batteries, and discloses a composite artificial SEI layer and a preparation method and application thereof. The composite artificial SEI layer is prepared from the following raw materials: a halogen functionalized metal-organic framework material, nitrate and a polymer binder, the nitrate is selected from one or more of silver nitrate, magnesium nitrate and indium nitrate, and the atom number ratio of halogen elements to metal elements in the halogen functionalized metal-organic framework material is greater than or equal to 2. According to the lithium ion battery prepared by adopting the composite artificial SEI layer, a composite SEI interface layer of Li-M / Li3N / LiX (M = Ag, Mg and In, and X = F, Cl, Br and I) can be spontaneously constructed on the surface of a lithium metal negative electrode, so that the growth of lithium dendrites is remarkably inhibited, the interface impedance is reduced, and the cycle coulombic efficiency of the battery is improved.

The invention belongs to the technical field of condensing lenses, and discloses a condensing lens and a preparation method and application thereof, and the preparation method comprises the following steps: obtaining an arc-shaped substrate, and coating the surface of the condensing side of the arc-shaped substrate with SiO2 to form a transition layer; spin-coating a first precursor solution on the surface of the transition layer, and annealing to obtain a condensing lens; wherein the first precursor solution is obtained by mixing indium nitrate and tin acetate according to the mass ratio of indium element to tin element of 9: 1, then adding the mixture into a first mixed solution of ethylene glycol monomethyl ether, monoethanolamine and H2O2 according to the volume ratio of 1: (0.1-0.2): (0.05-0.08), uniformly mixing and aging. According to the method, the technical bottlenecks of poor coating uniformity and insufficient film adhesion of a traditional arc-shaped surface are broken through, uniform spreading and tight attachment of the film on the surface of the arc-shaped substrate are guaranteed through the collaborative design of double-stage dynamic spin coating and the composite film, organic unification of interface adaptation and function enhancement is achieved, and the application range of the arc-shaped surface is widened. And the overall performance stability and the optical application effect of the condensing lens are effectively improved.

This invention relates to a method for preparing porous indium powder. The method uses indium nitrate tetrahydrate as the indium source, 2-aminoterephthalic acid as the main ligand, and 1-butylimidazole as the auxiliary ligand, dissolved sequentially in N,N-dimethylformamide at a molar ratio of 1:(1.2-1.5):(0.1-0.2). Indium-based MOF powder is synthesized through a stepwise high-pressure reaction. The MOF powder is then placed in an argon-hydrogen mixed gas atmosphere and reduced by stepwise temperature increases to prepare a composite precursor indium particles embedded in a carbon matrix. Finally, the composite precursor indium particles embedded in the carbon matrix is ​​dispersed in an acetic acid and citric acid etching solution, intermittently ultrasonically etched, filtered, washed, and dried to obtain porous indium powder. This invention can improve the specific surface area and ion / electron transport efficiency of indium powder, reduce oxygen content, and reduce indium powder agglomeration, thereby improving the adsorption performance and catalytic activity of indium powder.

The application relates to a low-temperature gas-sensitive material with an In2O3 layer grown on a ZnSnO3 surface and a preparation method thereof. The ZnSnO3 is an Archimedean solid particle, each triangular face around a multi-dimensional surface of the Archimedean solid particle is surrounded by three quadrilateral faces, each quadrilateral face shares a side with the triangular face, and In2O3 nanoparticles are uniformly grown on the multi-dimensional surface of the ZnSnO3 Archimedean solid particle to form a uniformly-distributed In2O3 particle composite layer. The method is as follows: zinc oxalate is dissolved in deionized water, tin chloride is added, sodium hydroxide particles are added, an indium nitrate solution is dropped, centrifugation is carried out after hydrothermal reaction, washing and drying are carried out, and finally calcination is carried out. The ZnSnO3 / In2O3 composite material has higher base resistance in air, high sensitivity to ethylene glycol gas and triethylamine gas, and low working temperature. The application has low preparation cost and good industrial application prospect.

The application belongs to the technical field of catalysts, and provides a catalyst for preparing methanol from carbon dioxide hydrogenation and a preparation method thereof. First, indium nitrate and zirconyl nitrate hydrate are added to citric acid, CTAB and PVP as metal precursors to obtain an In2O3-ZrO2 composite with high thermal stability and Lewis acid sites through hydrothermal treatment and calcination. Second, the In2O3-ZrO2 composite is combined with MOF and carbonized to obtain a C-MOF@In2O3-ZrO2 composite. Third, the C-MOF@In2O3-ZrO2 composite is mixed with an ionic liquid and heated and then rapidly cooled to obtain an IL@C-MOF@In2O3-ZrO2 composite. Fourth, the IL@C-MOF@In2O3-ZrO2 composite is subjected to weak reduction treatment in an H2 / Ar atmosphere to introduce additional oxygen vacancies, thereby obtaining the catalyst for preparing methanol from carbon dioxide hydrogenation.

The application discloses a preparation method and product of 1-octene-3-ol gas-sensitive material and application thereof, and improves the response of ternary metal oxide to 1-octene-3-ol through rare earth element doping. The preparation method comprises the following steps: taking a mixed solution of isopropyl alcohol and glycerol as a solvent, taking cadmium nitrate tetrahydrate and hydrated indium nitrate as cadmium sources and indium sources, and taking appropriate nitrate erbia hexahydrate to realize rare earth element Er doping; after water bath assisted dissolution, the mixed solution is transferred into a stainless steel high-pressure reaction kettle for sealing reaction; after the reaction is completed, the precursor material is obtained through washing and drying, and the gas-sensitive material is obtained through calcination. The gas-sensitive material prepared by the application has good response sensitivity to 1-octene-3-ol, and the electron mobility is further improved through rare earth element doping, so that the detection accuracy of the material under low VOC concentration is improved. The preparation method is simple and practical, and can be used for monitoring the aging phenomenon in the storage process of rice, so as to provide protection for food safety and fair trade of grain.

The invention belongs to the technical field of special fibers, and provides a conductive fiber and a preparation method and application thereof.The preparation method comprises the steps that indium nitrate, carbon nanotubes, ethyl alcohol and acetylacetone are mixed to obtain a metal salt solution; mixing polyvinylpyrrolidone, a urea water solution and ethanol to obtain a spinning base solution; the metal salt solution and the spinning base solution are mixed and then subjected to electrostatic spinning and temperature treatment, and a fiber template is obtained; and performing liquid indium coating and hot pressing on the surface of the fiber template to obtain the conductive fiber. Fibers obtained through spinning are subjected to two-step calcination, indium nitrate is reduced into indium oxide through first-step calcination, in this way, a fiber matrix of a porous structure is obtained, carbon nano tubes are evenly distributed in holes, and a conductive network is formed; the second-step calcination is carried out under the hydrogen condition, indium oxide is reduced into metal indium with uniform size, and the electrical conductivity of the fiber is further improved; and finally, through coating and hot pressing of the metal indium layer, the extension and thickness uniformity of the fiber in a complex environment are ensured.

This invention relates to a method for preparing and applying a polypyrrole-coated indium-based electrocatalyst. The method includes the following steps: adding carbon nanotubes to an N,N-dimethylformamide solution containing indium nitrate, transferring the solution to a high-temperature reactor, and reacting to obtain In₂O₃ / CNT; placing the In₂O₃ / CNT in an aqueous solution containing pyrrole, and then adding ammonium persulfate to react, thereby obtaining the polypyrrole-coated indium-based electrocatalyst. The polypyrrole-coated indium-based electrocatalyst obtained by this invention exhibits excellent electrocatalytic performance in the reduction of carbon dioxide to formic acid, possessing both high Faradaic efficiency and long-term catalytic stability.

The invention relates to the technical field of catalysts, in particular to a gold-based catalyst for preparing vinyl chloride and a preparation method of the gold-based catalyst, which are particularly suitable for an acetylene hydrochlorination reaction system in industrial production of polyvinyl chloride. The gold-based catalyst is prepared from the following raw materials in percentage by mass: 0.05%-1.0% of an active component HAuCl44H2O, 0.5%-5.0% of a cocatalyst and 0.05%-0.5% of a functional intermediate product I, wherein the functional intermediate product I is generated by carrying out hydrothermal reaction on sodium telluride, sodium dihydrogen phosphate and tetrabutyl titanate according to a molar ratio of 1: (0.5-2): (0.2-1); 0.1%-1.0% of a functional intermediate product II, wherein the functional intermediate product II is generated by reaction of gallium nitrate, indium nitrate and zirconium oxychloride according to a molar ratio of 1: (0.3-1): (0.2-0.8); 0.1%-0.8% of a nano zinc oxide-graphene composite dispersant; the balance is a composite modified activated carbon carrier.

The invention discloses an electrolyte and a preparation method and application thereof, and belongs to the field of chemical power sources. The electrolyte comprises lithium bis (fluorosulfonyl) imide, lithium bis (oxalato) borate, an additive and a solvent, the additive is indium nitrate. A small amount of lithium bis (oxalato) borate salt with relatively high HOMO energy level is added into the electrolyte to generate a boron-rich positive electrode interface layer, so that side reaction and particle cracks are effectively inhibited, and the cycling stability and safety are improved; a non-flammable mixed solvent of triethyl phosphate and methyl perfluorobutyl ether with a low HOMO energy level is adopted to reduce a large amount of decomposition of the solvent on the positive electrode side, so that the safety of the battery is improved; an additive In (NO3) 3 is introduced into the electrolyte to regulate and control a solvation structure of lithium ions, a lithium-loving and lithium-phobic dual-function SEI layer is constructed, and the cycling stability of LMB is improved.