91 results about "Tin dioxide" patented technology

The invention discloses a preparation method of a three-dimensional split-phase fancy glaze for coal gangue ceramic body decoration, the three-dimensional split-phase fancy glaze comprises a ground glaze and a cover glaze, the cover glaze comprises the following raw materials by weight: 15-20% of quartz, 10-15% of calcite, 5-10% of kaolin, 5-10% of zinc oxide, 10-15% of calcium phosphate, 25-30% of potassium feldspar, 2-5% of calcium borate, 5-10% of tin dioxide, 3-5% of spodumene, and 2-5% of a coloring oxide; the ground glaze is prepared from the following raw materials in percentage by weight: 15-20% of quartz, 10-15% of wollastonite, 5-10% of kaolin, 10-15% of zinc oxide, 15-20% of calcium phosphate, 15-20% of spodumene, 5-10% of titanium dioxide, 5-10% of calcium borate, 2-5% of coal gangue and 2-5% of coloring oxide, and the product is obtained through raw material preparation, glazing and sintering. The prepared three-dimensional split-phase fancy glaze is simple in process, high in adaptability, unique in effect and wide in market prospect.

The invention discloses a nitric acid type system tin stripping liquid centralized recovery treatment process which comprises the following steps: firstly, adding a cationic coagulant into a nitric acid type tin stripping waste liquid, filtering through a 5-micron filter membrane, discharging into a reaction kettle, and adding a H2O2 solution with the concentration of 5-10%; the pH is adjusted to 2.0-2.5, and copper is removed under the condition of 40-50 DEG C; when the pH value is increased from 2.5 to 3.0-3.5, iron is removed; adjusting the pH value to 13.0-13.5, heating to remove aluminum, and separating to obtain a filtrate containing Na2SnO3; adjusting the pH value of the filtrate to 6.0-6.5, heating to 70-75 DEG C for reaction, and then carrying out gradient cooling to room temperature to generate Sn (OH) 4 precipitate; and centrifugally separating the mixed solution to obtain a tin-containing solid and a tin stripping regenerated solution, and firing the tin-containing solid to obtain a tin dioxide solid. Compared with a traditional process, copper is removed firstly, then iron is removed, aluminum is finally removed, and directional removal is achieved through the difference of precipitation conditions.

The invention relates to the technical field of lithium ion battery electrode materials, and discloses a carbon-coated tin dioxide / MBene nano composite negative electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: preparing MBene through a hydrothermal etching method; the preparation method comprises the following steps: performing in-situ growth of SnO nanoparticles on MBene through a hydrothermal method to obtain a tin dioxide / MBene composite material; and adding a carbon source and carrying out carbonization treatment to form a carbon coating layer on the surface of the tin dioxide / MBene composite material. The prepared composite material effectively solves the problems of volume expansion, poor conductivity and unstable interface of SnO. The composite material disclosed by the invention is used as a lithium ion battery negative electrode active material, has high specific capacity, ultra-long cycle life and excellent rate capability, is simple and controllable in preparation process, and has the feasibility of large-scale production.

The invention relates to the technical field of electrochemical water treatment, in particular to a preparation method of a self-supporting antimony-doped tin dioxide nanoflower electrode, which comprises the following steps: dissolving trisodium citrate dehydrate and antimony trichloride in absolute ethyl alcohol; then adding water and stannous chloride dehydrate to form a precursor solution; heating the precursor solution, and naturally cooling; after cooling, carrying out solid-liquid separation on the bottom mud, and then cleaning and drying to obtain antimony-doped tin dioxide powder; taking antimony-doped tin dioxide powder, a pore-forming agent and a binder, grinding the materials until the materials are uniformly mixed, and transferring the materials into a tabletting mold for pressure casting to obtain a blank; and calcining the green body to obtain the product. Nano-flower-shaped antimony-doped tin dioxide powder is prepared, in the die casting and sintering process, due to the fact that nano-flower petals of the nano-flower-shaped antimony-doped tin dioxide powder are mutually staggered, a connection mode similar to a mortise and tenon joint mode is formed, and compared with nanospheres, the binding force between the powder is enhanced; and the mechanical strength, the electrochemical active area and the catalytic activity of the electrode are improved.

The application relates to a preparation method of a tin dioxide negative material, and belongs to the technical field of lithium battery negative material synthesis. The application aims at solving the problems of the existing SnO2 negative material, such as large volume effect in the charging and discharging process, easy falling off on the current collector, complex preparation process of the SnO2 negative material and high cost. The preparation method comprises the following steps: S1, preparing a micro-arc oxidation electrolyte; S2, placing a titanium foil and the micro-arc oxidation electrolyte in a micro-arc oxidation electrolytic tank, taking the titanium foil as a positive electrode and a stainless steel plate as a negative electrode; and S3, micro-arc oxidation. The application is used for the preparation of the tin dioxide negative material.

This invention discloses a method for preparing tin dioxide powder by freeze-drying to inhibit tin hydroxide agglomeration. The method involves adding a tin source solution (36-54 g / L) and a precipitant solution (5-30 g / L) at a mass ratio of 1:0.1-0.25 under constant temperature and magnetic stirring. The precipitant solution is then added dropwise to the tin source solution, reacting to form tin hydroxide colloid. After static aging, the colloid undergoes rapid cryogenic freezing to instantly freeze it into an ice state. The ice-state colloid is then subjected to low-temperature vacuum sublimation drying to obtain loose tin hydroxide dry powder. The dry powder is then calcined to obtain tin dioxide powder. This invention fundamentally eliminates the agglomeration of tin dioxide powder, resulting in tin hydroxide dry powder with an agglomeration rate of less than 10% and a purity of over 99.9%, providing a high-quality precursor for high-performance electronic-grade tin dioxide.

To provide a gas sensor with good response characteristics to gas (low-concentration gas in particular).SOLUTION: A gas sensor is provided, comprising a base material, first and second electrodes provided on a surface of the base material, and a gas sensing layer connected to the first and second electrodes and provided with a Ni-containing SnO2 nanosheet comprising an SnO2 nanosheet and Ni contained in the SnO2 nanosheet.SELECTED DRAWING: Figure 7

A kind of anti-spark ceramic and its body glaze, preparation method, use and ceramic tile, the body glaze is characterized in that, by mass fraction, its raw materials include: 3-12 parts of light calcium powder, 1-10 parts of magnesium oxide, 8-17 parts of dolomite powder, 6-12 parts of sodium sand, 6-12 parts of potassium sand, 0.5-6 parts of alumina and 10-25 parts of pottery clay, can also add tin dioxide, diantimony trioxide and zinc oxide as slurry conductive nanomaterial, can adjust both anti-spark property and anti-static property of ceramic to the best interval simultaneously.Anti-spark ceramic is provided with a body glaze layer prepared from the above-mentioned body glaze of anti-spark ceramic.The preparation method is used to prepare the above-mentioned anti-spark ceramic.The present application can solve the problem of friction impact sparking of other floor materials in the prior art, and also solve the problem that the anti-spark performance and anti-static performance of ceramic cannot be simultaneously achieved.

This invention discloses a high-temperature conductive graphene solution and its preparation method, comprising the following components by weight: 1800-2000 parts of a dispersion containing 3-5 nm graphene quantum dots, wherein the quantum dot content is 5-10 wt%; 450-510 parts of tin dioxide with a particle size ≤0.2 μm; 15-20 parts of ammonium tungstate and 15-20 parts of lanthanum oxide; 30-40 parts of manganese chloride tetrahydrate, 20-30 parts of nickel chloride, and 20-30 parts of copper chloride; 8000-10000 parts of a solvent system, wherein deionized water ≤4000 parts, anhydrous ethanol ≤5000 parts, isopropanol ≤100 parts, and n-butanol ≤50 parts; 800-1000 parts of tri-n-butyltin hydride and 100-300 parts of citric acid. Due to the adoption of the above technical solutions, this application has achieved breakthroughs in the stability of conductive networks through quantum dot bridging mechanisms; the standard deviation of electron migration path length has been reduced from 1.2 μm to 0.08 μm; the heterojunction interface has been optimized and a Type-II band structure has been formed, resulting in an 82% reduction in contact resistance.

The invention discloses a tin-based alloy catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts. The catalyst comprises a carrier and an active component, the carrier comprises tin dioxide or metallic tin, and the active component is selected from at least one of transition metal and main group metal with catalytic action; the mass percent of the active component in the catalyst is 0.01%-30%, preferably 0.01%-10%. The active component is selected from metal with a catalytic action and an eutectic point of 500 DEG C or below. According to the tin-based alloy catalyst, high conductivity and an adjustable electronic structure promote efficient electron transmission, reaction kinetics is remarkably improved, and meanwhile the tin-based alloy catalyst shows excellent chemical stability in the catalysis process. The tin-based alloy catalyst provided by the invention is simple to prepare, low in cost, environment-friendly, high in conductivity and excellent in stability, and shows strong industrialization potential in the field of clean energy.

The invention relates to tungsten-doped tin dioxide nano-powder, a preparation method thereof and application of the tungsten-doped tin dioxide nano-powder in a semiconductor type gas sensitive element. The preparation method of the tungsten-doped tin dioxide nano-powder comprises the following steps: dissolving a soluble tungsten compound and a soluble tin compound in an aqueous solution containing a surfactant, and adding a complexing agent to obtain a uniform metal ion mixed solution; adding a precipitant into the mixed solution under a stirring condition, and adjusting the pH value to 2-6 to precipitate the metal hydroxide precursor; performing aging, solid-liquid separation, washing and drying on the precipitate to obtain precursor powder; adding a dispersing agent into the precursor powder, and uniformly mixing; and calcining to obtain the tungsten-doped tin dioxide nano powder. The tungsten-doped tin dioxide nano-powder can be used for preparing a semiconductor type gas sensor, an ultraviolet detector, a lithium ion battery negative electrode material, a catalyst or a transparent conductive film.

This invention discloses a method for preparing tin dioxide hydrated colloidal precursors via dual-anode synchronous electrolysis, belonging to the field of electrochemical preparation technology of inorganic functional materials. The method includes the following steps: a) preparing an electrolyte containing 0.01 M hydrochloric acid and adjusting the initial pH value; b) using a high-purity tin plate as anode 1 and a titanium-based size-stabilized electrode as anode 2; using the titanium-based size-stabilized electrode as a common cathode; c) applying a DC voltage for constant-voltage synchronous electrolysis; anode 1 dissolves to generate stannous ions, anode 2 electrolyzes chloride ions to generate hypochlorous acid, and the hypochlorous acid instantly oxidizes the stannous ions to tetravalent tin ions in the bulk solution far from the cathode, forming a translucent tin dioxide hydrated colloidal precursor in situ in an acidic medium; d) drying the resulting colloid under reduced pressure and then calcining it at 200–250℃ to obtain high-purity nano-tin dioxide. This invention achieves integrated "dissolution-oxidation-gelation" through dual-anode synergy, avoiding the loss of hypochlorous acid during cathode reduction.

The invention relates to the field of electrode materials, in particular to a g-C3N4-based electrode material and a supercapacitor, and the g-C3N4-based electrode material is composed of g-C3N4 and a metal oxide; the metal oxide is loaded between layers and on the surface of the g-C3N4, the metal oxide is of a one-dimensional nanostructure, the invention further provides a preparation method of the g-C3N4-based electrode material, tin dioxide and g-C3N4 can have better dispersity after being compounded, agglomeration is avoided, the electrochemical performance is excellent, and the preparation method is suitable for industrial production. The method has a practical application prospect, and provides more thoughts and a larger selection space for people to select supercapacitor electrode materials in the future.

The invention discloses a semiconductor hydrogen sensor preparation method based on HMDS gas phase heat treatment, which comprises the following steps: mixing an organic silicon precursor with a solvent, then adding nanoscale tin dioxide powder, mixing, fully grinding, then uniformly coating on a sensor substrate, forming a semiconductor hydrogen sensitive layer on the sensor substrate, and then carrying out high-temperature sintering treatment to obtain the semiconductor hydrogen sensor based on HMDS gas phase heat treatment. The preparation method comprises the following steps: adding stannic oxide particles to remove organic components and promote neck connection among the stannic oxide particles to obtain a sensor blank, putting the sensor blank into a quartz tube reactor, introducing hexamethyl disiloxane steam taking high-purity standard air as carrier gas, and carrying out gas-phase heat treatment on a sensitive layer under a heating condition to form a hydrophobic layer on the surface, thereby obtaining the surface-modified hydrogen sensor. Through the synergistic effect of gas phase surface modification and the like, the sensitivity and the response speed of the hydrogen sensor are remarkably improved, the selectivity and the environmental adaptability are enhanced, and the problems of water vapor interference, unstable response and insufficient mechanical strength in the prior art are effectively solved.

This invention relates to a nickel-manganese bimetallic hydroxide / oxide electrochromic thin film, its preparation, and its application. The electrochromic thin film of this invention is directly grown on the surface of fluorine-doped tin dioxide (FTO) conductive glass via a hydrothermal method. The specific steps are as follows: First, nickel source, manganese source, urea, and ammonium fluoride are dissolved in deionized water, then transferred to a hydrothermal reactor. An FTO conductive glass is placed in the reactor with its conductive side facing down. After a period of constant-temperature hydrothermal reaction, it is naturally cooled to room temperature. The FTO conductive glass is then removed from the reactor, cleaned, and dried to obtain the nickel-manganese bimetallic hydroxide electrochromic thin film. After calcination at a certain temperature, a nickel-manganese bimetallic oxide electrochromic thin film is obtained. Compared with single nickel oxide and manganese oxide, the NiMnLDH thin film of this invention exhibits a larger light modulation amplitude in the visible light region and higher transmittance in the faded state, making it applicable to electrochromism and related fields.

The invention relates to a method for preparing a three-dimensional mesoporous graphene / tin oxide composite material. The method comprises the following steps: (1) obtaining tin dioxide nanoparticles; (2) generating metal carbonate on the surfaces of the tin dioxide nano-particles to obtain a compound in which the tin dioxide nano-particles are coated with the metal carbonate; calcining to thermally decompose the metal carbonate to generate a metal oxide, so as to obtain a mesoporous compound; (3) depositing graphene on the surface of the mesoporous compound and in mesopores to obtain a graphene-coated mesoporous compound; and (4) carrying out acid pickling on the graphene-coated mesoporous compound to remove the metal oxide so as to obtain the three-dimensional mesoporous graphene / tin oxide composite material. The three-dimensional mesoporous graphene / tin oxide composite material disclosed by the invention has excellent electrochemical performance, and can be used for improving the charge-discharge cycle stability of a lithium / sodium ion battery negative electrode material.

The invention provides an electron transport layer precursor, a trans-perovskite cell and a preparation method, and the preparation method of the electron transport layer precursor comprises the following steps: dispersing tin dioxide nanoparticles in an organic solvent, adding carboxylic acid into the organic solvent to adjust the pH value to 5.5-6.5, and then carrying out ultrasonic dispersion to obtain the electron transport layer precursor. Tin dioxide nanoparticles are dispersed in an organic solvent by using carboxylic acid, the pH value is adjusted to 5.5-6.5, carboxyl in an acidic medium can be coordinated with Sn-OH groups on the surface of tin dioxide, and residual carboxylate ions (-COO-) can provide electrostatic repulsive force, so that the dispersion of tin dioxide is facilitated; meanwhile, carbon chains of carboxylic acid molecules can provide certain steric hindrance, and agglomeration of tin dioxide nanoparticles is avoided.

The invention relates to a P-WO3 / SnO2 composite material derived based on phosphotungstic acid as well as a preparation method and application of the P-WO3 / SnO2 composite material. According to the material, a precursor solution containing tin chloride and phosphotungstic acid (HPW) is subjected to electrostatic spinning, and the fiber material with a hollow pipeline structure is prepared by means of a high-temperature calcination process. In the preparation process, a tungstate radical component in phosphotungstic acid is converted into tungsten trioxide (WO3), and the tungsten trioxide (WO3) and stannic oxide (SnO2) form a heterojunction interface. Meanwhile, phosphorus atoms are doped into material crystal lattices, a local electron regulation and control effect is generated, and the electron transfer capacity is enhanced. By adopting a synergistic effect of constructing a heterojunction interface and doping phosphorus element, an electric field built in the interface is effectively enhanced, and oxygen vacancies and an electronic structure of the material are regulated and controlled, so that the gas-sensitive response performance to triethylamine (TEA) gas is remarkably improved. The invention provides a new technical approach for constructing the heterojunction by using the complex oxysalt and cooperatively improving the gas sensing performance in combination with element doping.

The invention relates to the technical field of sodium battery negative electrodes, and particularly discloses a phenolic resin-based tin-carbon negative electrode material and a preparation method thereof, and the preparation method comprises the following steps: mixing a phenolic substance with an aldehyde substance, adding a solid tin source which is tin powder or / and tin dioxide powder, uniformly stirring, adding a catalyst ammonia water, heating for reaction, and cooling to room temperature to obtain the phenolic resin-based tin-carbon negative electrode material. The viscosity is monitored in the reaction process, when the viscosity is larger than or equal to 800 mPa.s, discharging, drying, crushing and grinding are conducted, and finally carbonization is conducted in the inert atmosphere. The phenolic resin-based tin-carbon negative electrode material with good charge-discharge performance is prepared by taking the tin powder or / and the tin dioxide powder as the tin source, so that the cost is reduced, meanwhile, the risks of waste water generation and human body injury caused by the use of a liquid tin source are avoided, and the preparation method does not generate obvious adverse effects on a kiln and has a great popularization prospect.

This invention provides a gas-phase method and apparatus for preparing high-purity nano-tin dioxide powder, comprising the following steps: a tin source is vaporized using mid-frequency plasma to form tin vapor; the tin vapor is reacted with oxygen in an oxidation growth zone, while simultaneously injecting gadolinium oxide nanoaggregate aerosol; and the reaction is carried out through the surface oxygen vacancies and Gd2+ of the gadolinium oxide nanoaggregates. 3+ The coordination adsorption of tin-oxygen species at specific sites induces heterogeneous nucleation, generating nano-sized tin dioxide particles. These nano-sized tin dioxide particles are then subjected to in-situ surface functionalization treatment at 20-60°C with ultraviolet light at wavelengths of 185 nm and 254 nm, followed by the introduction of ozone at a concentration of 10-100 ppm for a residence time of 60-120 s. The surface-functionalized nano-sized tin dioxide particles are collected using an electrostatic-assisted method and dried to obtain high-purity nano-tin dioxide powder. This invention refines grain size, optimizes particle dispersibility, and achieves efficient particle collection. The resulting powder possesses both ultra-fine particle size and high purity, meeting the application requirements of cutting-edge new materials.

The application discloses a preparation method of a tin oxide electron transport layer and application of the tin oxide electron transport layer in a perovskite solar module, and belongs to the technical field of new energy photovoltaic materials. The steps are as follows: 1) providing a tin precursor solution for preparing tin dioxide by a bivalent tin chemical bath deposition, and adding a first additive and a second additive to obtain a chemical bath deposition solution; wherein the first additive is a molecule with a phosphoric acid group and a choline group; and the second additive is a polyanion molecule with high electronegativity; 2) immersing a conductive substrate into the chemical bath deposition solution to perform chemical bath deposition; and 3) finally performing cleaning and heat treatment to obtain the tin oxide electron transport layer. The application can obtain a large-area, dense and uniform tin oxide film, and the tin oxide film has excellent optical transmittance, electrical uniformity and interface charge transport capacity, is used in the perovskite solar module, and significantly improves photoelectric conversion efficiency and a fill factor, reduces performance attenuation in an area amplification process, and has excellent comprehensive performance.

The application discloses a kind of antimony-doped tin dioxide transparent conductive film and preparation method thereof.The preparation method of the film includes the following steps: (1) using vacuum evaporation method to form tin / antimony / tin layered sandwich structure metal film on the surface of substrate;(2) the metal film prepared in step (1) is used as working electrode, and platinum electrode is used as counter electrode for electrolysis;(3) the metal film after electrolysis is taken out for cleaning, and then annealing treatment is carried out, to obtain the antimony-doped tin dioxide transparent conductive film.The application obtains tin dioxide film by vacuum evaporation of tin and antimony metal, and obtains transparent conductive tin dioxide film after high-temperature annealing.The sheet resistance of the film can reach 198Ω / □, and the light transmittance can reach more than 70% after the film is doped with antimony.The application has the advantages of good universality, low equipment requirement, simple preparation and good repeatability, and has good popularization value.

The application discloses a tin-copper soot recovery method, which comprises the following steps: step P1, tin-copper soot cleaning, ball milling the tin-copper soot in pure water and performing a filtering and drying procedure to obtain tin-copper soot powder; step P2, carbon powder mixing, mixing the tin-copper soot powder obtained after the drying in step P1; step P3, stirring and heating, stirring and heating the mixture of the carbon powder and the tin-copper soot powder obtained in step P2 at a preset temperature in an acidic atmosphere; step P4, sieving, sieving the mixture obtained in step P3, wherein the main component of the powder falling through the sieve is a copper powder mixture, and the main component of the powder obtained on the sieve is carbon powder and a mixture of carbon powder and tin dioxide; and step P5, high-temperature roasting, performing high-temperature roasting on the carbon powder and the mixture of carbon powder and tin dioxide in step P4 in an air or oxygen atmosphere to generate tin dioxide powder; and high-purity nanoscale tin dioxide particles can be obtained.

The invention provides a gas sensitive material facing an MEMS hydrogen sensor and a preparation method thereof, and belongs to the technical field of semiconductor type hydrogen sensors, the gas sensitive material facing the MEMS hydrogen sensor comprises a substrate, an isolation layer above the substrate, an interdigital electrode above the isolation layer, a first sensitive material layer above the interdigital electrode, and a second sensitive material layer above the first sensitive material layer, a second sensitive material layer is arranged above the first sensitive material layer, and a catalyst layer is arranged above the second sensitive material layer; wherein the first sensitive material layer is made of tin dioxide, the second sensitive material layer is made of tantalum pentoxide, and the first sensitive material layer and the second sensitive material layer jointly form a heterojunction structure; the catalyst layer is deposited above the second sensitive material and is made of palladium; the first sensitive material layer, the second sensitive material layer and the catalytic layer jointly form a gas sensitive material. According to the invention, the tantalum oxide-tin oxide heterojunction is constructed and the palladium nano catalyst layer prepared by electron beam evaporation is modified, so that the response speed, the sensitivity and the selectivity are improved.

The invention belongs to the technical field of electro-catalysis, and particularly relates to a low-crystalline tin dioxide catalyst for electro-catalysis and a preparation method of the low-crystalline tin dioxide catalyst. The preparation of the low-crystalline tin dioxide is realized by regulating and controlling the solute type, the solvent proportion and other elements and adopting a simple one-step precipitation method. The low-crystalline-state catalyst contains rich crystalline-amorphous-state heterogeneous interfaces and defects (such as oxygen vacancies), carbon dioxide adsorption and activation are enhanced, formic acid selectivity and catalytic reaction activity are improved, high Faraday efficiency is kept under industrial-grade current density, and the problems that a traditional SnO2 catalyst is poor in stability under large current, and hydrogen evolution side reaction is aggravated are solved. In addition, the method does not need high-temperature calcination, is low in energy consumption, uses common reagents, and is suitable for industrial large-scale preparation. The low-crystalline tin dioxide shows excellent activity and selectivity in production of formic acid through reduction of CO2 under electro-catalysis.

The application relates to a water oxidation electrocatalyst for a proton exchange membrane electrolysis cell anode, in particular to a SnO2-loaded amorphous IrCoO x Anode electrocatalyst and preparation method and application thereof x @The SnO2 proton exchange membrane electrolysis water anode electrocatalyst comprises SnO2 nanoparticles and amorphous IrCoO x nanoparticles, 1.5<= x <=1.9, wherein the mass content of the SnO2 nanoparticles is 16%-42%, the mass content of the IrCoO x nanoparticles is 58%-84%. The application overcomes the defects that the existing OER catalysts cannot simultaneously consider high activity and long-term stability, and thus are not suitable for large-scale commercial application.

The application belongs to the technical field of glass-ceramics material, and provides high-strength glass-ceramics and a preparation method thereof, the glass-ceramics comprises the following raw materials in parts by weight: 48-60 parts of silicon oxide, 5-8 parts of calcium oxide, 8-12 parts of aluminum oxide, 4-6 parts of diaphosphorus pentoxide, 3-5 parts of zirconium oxide, 5-7 parts of lithium oxide, 1-3 parts of titanium oxide, 0.01-0.04 parts of potassium oxide, 0.01-0.02 parts of tin dioxide, 0.005-0.01 parts of sodium fluoride, 0.005-0.01 parts of ytterbium fluoride, 0.001-0.005 parts of a clarifying agent and 0.01-0.1 parts of a colorant. The glass-ceramics has high strength and impact strength, is not prone to thermal expansion or thermal deformation, and can be widely applied in the fields of optical devices, electronic display and the like.

The application provides a gas sensor surface anti-interference coating, which comprises the following materials in parts by mass: nanometer silicon dioxide 5.5-10.5 parts, nanometer titanium dioxide 3.5-5.6 parts, nanometer tin dioxide 10-15.5 parts, palladium chloride substrate 1-2 parts and distilled water. The application also provides a preparation method of the gas sensor surface anti-interference coating, which comprises the following steps: mixing nanometer tin dioxide, nanometer silicon dioxide and nanometer titanium dioxide, grinding, sintering treatment, mixing the sintered nanometer composite material with a water solution of the palladium chloride substrate and a polar protic solvent, grinding again, drying treatment, removing the solvent, and forming a final gas sensor nanometer composite anti-interference material coating. The nanometer composite anti-interference material coating prepared by the application has strong adsorption capacity for interference substances of the gas sensor, meanwhile, the permeability of detection gases such as methane is not affected, the response voltage of the gas sensor to the interference substances is significantly reduced, the anti-interference capacity is improved, and the surface coating does not have a failure phenomenon.

This invention belongs to the field of electrocatalysis technology, specifically relating to an electrode composite material, its preparation method, and its application. The invention provides an electrode composite material comprising a carbon matrix and modified tin dioxide and cobalt tetroxide supported on the carbon matrix; the modified tin dioxide comprises tin dioxide and rare earth elements and zirconium doped into the tin dioxide. By doping the tin dioxide with rare earth elements and zirconium, this invention enables the formation of a solid solution oxide with the tin dioxide. The doping of rare earth elements and zirconium refines the tin dioxide grains, making the solid solution film more dense, uniform, and continuous, significantly improving the activity and stability of the catalyst. This invention modifies the carbon matrix with modified tin dioxide and cobalt tetroxide, resulting in fine, uniform, dense, and crack-free grains of the modifying material supported on the carbon matrix. Simultaneously, the carbon matrix material exhibits good conductivity. The synergistic effect of the modifying material and the carbon matrix improves the electrocatalytic degradation performance and catalyst stability of the composite material.

The invention discloses a tannic acid bionic modified perovskite solar cell and a preparation method thereof. The tannic acid bionic modified perovskite solar cell sequentially comprises a conductive substrate, a tannic acid-tin dioxide composite electron transport layer, a tannic acid bionic interface layer, a perovskite light absorption layer, a hole transport layer and a metal electrode from bottom to top, the tannic acid-stannic oxide composite electron transport layer is prepared by mixing tannic acid and stannic oxide through a solution, spin-coating and annealing, and the tannic acid and the stannic oxide form a coordination effect; the tannic acid bionic interface layer realizes interface bonding and defect passivation through coordination of tannic acid molecules, tin dioxide and perovskite, and high-quality perovskite crystals are obtained. According to the invention, the carrier migration rate is effectively improved, interface defects and barriers are reduced, and the light absorption capability and crystallinity of the perovskite crystal are improved.