135 results about "Silver oxide" patented technology

The nano titanium oxide main body photocatalytic sterilization multi-element material provided by the invention comprises 85%-98% of a nano titanium oxide material, 2%-15% of a perovskite material and a modifier, the modifier comprises silver, silver oxide and graphene, and the modifier comprises a nano titanium oxide main body and a nano titanium oxide main body. The nano titanium oxide main body photocatalytic sterilization multi-element material can fully utilize the characteristics of a perovskite structure material, overcomes the defects of a nano titanium oxide material, improves the light utilization rate, inhibits carrier recombination, improves the antibacterial durability, can utilize ultraviolet light to carry out catalytic sterilization and can also utilize ions to carry out sterilization, and the antibacterial effect is good. Sterilization can be achieved through the photolysis reaction of visible light, the synergistic composite sterilization effect is achieved, harmful germs are rapidly and effectively killed, the environment is kept fresh and safe, and the comprehensive sterilization and deodorization effect can be achieved by adding the modifier; the preparation method of the nano titanium oxide main body photocatalytic sterilization multi-element material provided by the invention is simple in steps, convenient to operate and easy to implement.

The invention provides a graphene-based hydrogen sulfide gas sensor and a preparation method thereof, and relates to the technical field of gas sensors. The preparation method of the graphene-based hydrogen sulfide gas sensor comprises the following steps: soaking the wood substrate in a mixed metal salt solution containing a water-soluble silver salt and a water-soluble transition metal salt; irradiating the soaked wood substrate by using a laser beam at room temperature under the condition of no shielding gas, so that lignin and cellulose in the wood substrate are cracked and reconstructed to form graphene; meanwhile, the mixed metal salt immersed in the wood substrate is decomposed to form bimetallic oxide nanoparticles including silver oxide nanoparticles and transition metal oxide nanoparticles, and the bimetallic oxide nanoparticles are dispersed on the surface of each layer of graphene to obtain a sensitive layer; and coating conductive materials on the wooden substrate and on the two sides of the sensitive layer to form a connecting electrode in contact with the sensitive layer, thereby obtaining the graphene-based hydrogen sulfide gas sensor.

The invention discloses bacteriostatic and antibacterial lithium disilicate glass ceramic and a preparation method thereof. The bacteriostatic and antibacterial lithium disilicate glass ceramic comprises the following components in percentage by weight: 60-70% of lithium disilicate whiskers, 5-12% of a nucleating agent, 1-5% of aluminum oxide, 1-4% of calcium oxide, 5-10% of an antibacterial agent and 12-18% of fluorapatite, wherein the nucleating agent is formed by compounding phosphorus pentoxide and zirconium oxide, and the antibacterial agent is formed by compounding silver oxide and zinc oxide; the invention relates to the technical field of lithium disilicate glass ceramics. In the glass ceramic, silver ions can be combined with groups such as sulfydryl and amino in bacterial cells to interfere the metabolic process of bacteria and inactivate enzymes of the bacteria so as to inhibit growth and reproduction of the bacteria, and zinc ions can influence permeability of bacterial cell membranes and destroy physiological functions of the bacteria and cooperate with the silver ions to enhance the antibacterial effect of the glass ceramic.

The invention discloses a 6N high-purity silver raw material for a target material and a preparation method thereof.The preparation method of the 6N high-purity silver raw material for the target material comprises the following steps that 4.5 N silver is placed in a vacuum intermediate frequency furnace to be smelted, and an anode plate is prepared; silver nitrate is purified through a crystallization method and a silver oxide purification method, and high-purity silver nitrate is obtained; the anode plate is loaded into a ceramic membrane, the high-purity silver nitrate is taken to be prepared into an electrolysis mother solution, then the anode plate loaded into the ceramic membrane serves as an anode, titanium-coated silver serves as a cathode, the electrolysis mother solution serves as an electrolyte, and electrolysis is conducted to prepare high-purity silver powder; and the high-purity silver powder is placed in a graphite crucible to be subjected to vacuum melting and then poured into a graphite mold, and the 6N high-purity silver raw material for the target material is prepared. According to the 6N high-purity silver raw material for the target material and the preparation method of the 6N high-purity silver raw material, the purity and stability of the 6N high-purity silver raw material are improved on the basis of guaranteeing the purity of the 6N high-purity silver raw material through combination of various modes such as raw material optimization, equipment optimization and process step improvement.

The invention relates to the technical field of comprehensive recovery and resource utilization of gold dressing and smelting, in particular to a method for comprehensively recovering valuable elements by resource utilization of roasting cyanidation tailings. Comprising the following steps: S1, acidifying and curing the roasted cyanidation tailings; s2, carrying out high-acid leaching on the acidified and cured filter cake; s3, recovering gold, copper and iron; s4, roasting the high-acid acid leaching residues and the copper-zinc-silver oxide ore; s5, recovering copper and zinc from the roasted ore; and S6, gold and silver are extracted from the copper-zinc acid leaching residues. Valuable elements in the roasting cyanidation tailings are efficiently recycled and utilized, high-value utilization and clean production of resources of the roasting cyanidation tailings are achieved, the technical problem that the valuable elements in the roasting cyanidation tailings are difficult to effectively recycle is solved, the technological process is smooth, operability is high, the environment is good, and the method is suitable for industrial production. The method has remarkable economic benefits, social benefits and environmental benefits.

The invention discloses high-transmittance wear-resistant antibacterial dry granules, glaze, a ceramic tile and a preparation method thereof, and belongs to the technical field of building materials. The high-transmittance wear-resistant antibacterial dry granules are prepared from the following raw materials in parts by mass: 15 to 25 parts of potassium feldspar, 12 to 20 parts of lithium feldspar, 6 to 12 parts of dolomite, 4 to 12 parts of calcined soil, 2 to 10 parts of corundum, 0.2 to 1.0 part of silver oxide, 0.2 to 1.0 part of tungsten trioxide, 2 to 6 parts of zinc oxide, 20 to 30 parts of cubic boron nitride and 5 to 15 parts of aluminum nitride. The high-transmittance wear-resistant antibacterial dry granules are obtained by firing raw materials at 1500-1600 DEG C, preserving heat for 30-60 minutes and then quenching, wherein water for quenching is circulating cooling water. A glaze layer and a high-transmittance wear-resistant ceramic tile prepared from the high-transmittance wear-resistant antibacterial glaze added with the high-transmittance wear-resistant antibacterial dry particles are good in transparency and color development and high in hardness and wear-resistant grade, and meanwhile, the glaze layer and the high-transmittance wear-resistant ceramic tile have the antibacterial performance.

The application discloses a heat-insulating and light-shielding curtain and a preparation method thereof, and relates to the field of curtains. The graphene oxide is first prepared into a hydrogel, and modified carbon black is added to improve the light-shielding performance of the curtain; then, silver carboxylate is generated by the reaction between silver oxide and the carboxyl in the hydrogel, so that the antibacterial effect of the curtain is improved; the hydrogel is then frozen and spun, and is woven to obtain an aerogel fabric layer; bamboo charcoal microsphere particles are added to a bottom glue layer, and form spherical protrusions with tin foil, so that the light can be reflected, and the light-shielding effect is improved; the main raw material of a surface glue layer is titanium dioxide modified polyurethane, which is rolled on the surface of the tin foil to further improve the light-shielding, heat-insulating and antibacterial performances; finally, electrostatic flocking is performed to obtain the curtain with the heat-insulating and light-shielding effects.

The invention belongs to the technical field of electrocatalytic carbon dioxide reduction catalysts, and discloses a silver-based catalyst suitable for fluctuating carbon dioxide electrolysis and a preparation method of the silver-based catalyst. The preparation method comprises the following steps: uniformly and continuously dropwise adding a potassium hydroxide solution into a silver nitrate solution to prepare a silver oxide catalyst, and further applying a constant reduction current to the silver oxide catalyst in the presence of carbon dioxide gas for in-situ reduction to prepare the quintuple twin crystal silver-based catalyst. The preparation method disclosed by the invention combines precipitation titration and in-situ electroreduction methods, and has the characteristics of simplicity in operation, greenness, high efficiency and suitability for mass production; meanwhile, the catalyst can maintain high selectivity to carbon monoxide products in an extremely wide potential window range of 3V when being used in an electro-catalysis carbon dioxide conversion reaction, and is very suitable for being directly matched and coupled with fluctuating renewable energy sources.

The present application relates to the field of medicine synthesis, and discloses a preparation method and application of brominated piperonal carboxylic acid, wherein the brominated piperonal carboxylic acid compound is prepared from o-vanillin as a starting material through acetyl protection, bromination reaction, deprotection and demethylation reaction, cyclization reaction and Pinnick oxidation reaction.No longer through a brominated piperonal intermediate, and without using a live LDA reagent low-temperature lithiation reaction, the safety and stability are greatly improved.The deprotection and demethylation reaction is carried out in one pot, and the use of boron tribromide and other reagents is avoided;finally, the oxidation step from aldehyde to acid avoids using traditional silver oxide or potassium permanganate oxidation, and adopts Pinnick oxidation, which is economic, environmental protection and cost reduction, and greatly improves the yield.The whole has the advantages of easy-to-obtain raw materials, short steps, mild reaction conditions, low production cost, environmental protection, high yield and high purity, and can meet the high quality requirements of pharmaceutical products.

This invention discloses a biodegradable polymeric flocculant and its application, specifically comprising the following steps: dissolving sulfonated starch in deionized water, adding chitosan composite powder, heating and stirring until dissolved, ultrasonically dispersing, adding acrylamide, then adding N,N'-methylenebisacrylamide and potassium persulfate, stirring until a gel is formed, cutting the gel into small pieces and immersing them in distilled water for washing, drying, pulverizing and sieving the washed gel to obtain the biodegradable polymeric flocculant; this invention improves flocculation and biodegradability by combining synthetic organic polymers and natural polymeric materials, and enhances antibacterial ability and degradation performance by combining silver oxide, titanium oxide and graphene oxide, exhibiting good flocculation and sedimentation ability, excellent biodegradability, and good antibacterial ability.

The invention discloses a liquid heavy metal reactor aerosol protective coating and a preparation method and application thereof, and the liquid heavy metal reactor aerosol protective coating comprises a polymer coating prepared from an acrylic monomer, an emulsifier, an initiator and an organic solvent; the hydrogel coating is prepared from acrylamide, acrylic acid, a cross-linking agent, a photoinitiator and ionic liquid with positive charges; the polymer coating and the hydrogel coating are loaded with nano silver oxide particles. The double-layer coating disclosed by the invention has a relatively good capturing effect on resettled aerosol in air after film formation. A solvent is fixed in the upper hydrogel coating, the solvent is released at a gel-aerosol interface, the surface is locally wetted, and the effects of covering, wetting, adhering, adsorbing and the like on resettled aerosol particles are facilitated.

The application discloses a method for comprehensive recovery and utilization of oxidized lead-tin-silver ore, which comprises the steps of pretreatment, oxidized lead flotation, mixed concentrate concentration, table operation and post-treatment. The oxidized lead-silver-tin is recovered through the combined process of flotation and gravity separation, and the process flow is simple, easy to operate, energy-saving, environment-friendly, and good in applicability. The obtained lead concentrate is high in lead grade and high in recovery rate, and tin and silver are comprehensively recovered and utilized in the form of various valuable minerals.

The present invention provides a method for producing silver nanoparticles, which can produce silver nanoparticles having a fine particle diameter with high production efficiency. One embodiment of the present invention is a method for producing silver nanoparticles, comprising: a raw material preparation step for preparing a silver oxide suspension containing a silver oxide and a solvent; and a silver nanoparticle formation step in which silver nanoparticles are formed by irradiating a suspension of a silver oxide with microwaves at an absorption amount in the range of 41-81 W / mL while flowing the suspension.

The invention provides low-temperature curing weldable conductive paste as well as a preparation method and application thereof, and belongs to the technical field of printed electronic materials. The weldable conductive paste comprises the following components by mass: 11-15% of an organic carrier; 70-85% of a conductive component; 0-19% of an organic solvent; the organic carrier comprises a rosin solution, epoxy resin and a latent curing agent; the conductive component is a micron silver sheet loaded with nano silver oxide; the length of the silver sheet is 1-15 [mu] m; the particle size of the nano silver oxide is 200 to 400 nm. According to the low-temperature cured weldable conductive silver paste provided by the invention, the wettability of the solder on the silver ink layer can be improved, so that the welding binding force is improved; and meanwhile, a silver ink layer printed by the paste has relatively high conductivity.

The present application provides a kind of defective catalyst and its preparation method and application, the defective catalyst includes defective titanium dioxide carrier and the metal oxide active center supported on the defective titanium dioxide carrier;The metal oxide active center includes silver oxide;The defective catalyst has high specific surface area and high catalytic activity, can be used for catalytic degradation N-VOCs and synergistic production NH3, the conversion rate of N-VOCs is preferably up to 98.0% or more, while the yield of NH3 is preferably up to 100%;Realize the efficient degradation of N-VOCs and its green resource utilization of nitrogen resource.

The application provides a preparation method of a catalyst and a preparation method of HMFCA, and relates to the technical field of organic synthesis. In the application, an inorganic base and an oxidant are used to oxidize a silver salt aqueous solution to obtain a silver oxide catalyst with good oxidation performance. The silver oxide catalyst is used to oxidize HMF under the action of the base and the oxidant, and the conversion rate of HMF is high and the selectivity is good.

The utility model belongs to the technical field of silver electrolysis recovery, and particularly relates to a filtering device in silver electrolysis equipment, which comprises an electrolytic bath, a filtering box and a purifying box, the purifying box is internally provided with a purifying device, and the filtering box is internally provided with a filtering device. According to the filtering device in the silver electrolysis equipment, a centrifugal motor is started to drive a rotating shaft to rotate in a fixed bearing, so that a centrifugal barrel is driven to rotate in a filtering box, electrolyte and silver powder are centrifugally separated and filtered through filtering dense holes formed in the outer surface of the centrifugal barrel, and silver oxide is added into the electrolyte in a purifying box through a dosing hopper; then, a stirring motor is started to drive a stirring shaft to rotate in a bearing, so that a stirring plate outside the stirring shaft is driven to rotate, silver oxide and the electrolyte are promoted to be subjected to a full mixing reaction, impurities such as bismuth, antimony, lead, copper and iron in the electrolyte are completely separated out, and nitric acid is added into the purified electrolyte through a dosing hopper to adjust the acidity.

The invention provides stable-performance ink and a preparation method and application thereof in ceramic products, the stable-performance ink is suitable for the field of ink, and the stable-performance ink comprises a reinforced color, a solvent, a dispersing agent, a surfactant, a preservative and a modified adhesive; wherein the enhanced color comprises Fe2O3 and Ag2O which are added according to the weight ratio of (7-10): (1-3); the modified adhesive comprises bauxite powder and resin which are added according to the weight ratio of (1-3): (2-4); a modified adhesive composed of bauxite powder and resin is added into the ink, so that the performance stability of ferric oxide in application of ceramic ink, color, paint and the like can be ensured; the oxidation-reduction reactivity of divalent silver ions in silver oxide is higher than the activity of ferric ions, so that the divalent silver ions can preferentially replace colored ferric oxide for oxidation-reduction reaction, the ferric ions are protected, the ferric oxide serving as the color is locked, and the stability of the ink is improved.

The invention discloses a micro-channel continuous flow preparation method of a silver tin oxide electrical contact material, and belongs to the technical field of silver-based electrical contact materials. The method specifically comprises the following steps: firstly, calculating the required amounts of tin nitrate, silver nitrate and sodium hydroxide, and respectively preparing into solutions by using water; then the prepared solutions are synchronously conveyed into a micro-channel reactor at the flow speed of 70-90 ml / min for reaction, filtering is conducted, and composite powder of silver oxide and tin hydroxide is obtained; the obtained composite powder is washed, dried and roasted, and silver tin oxide composite powder is obtained; and then carrying out conventional forming, sintering and extruding procedures to obtain the composite material. According to the invention, the microchannel reactor is applied to the preparation of the silver tin oxide electrical contact for the first time, and the particle size distribution of tin oxide is controlled by limiting the flow velocity of the solution on the basis of enhancing mass transfer by using the microchannel reactor to uniformly disperse tin oxide in a matrix; therefore, the obtained electrical contact has a uniform microstructure and can also obtain more excellent mechanical properties at the same time.

The utility model discloses a solution purification device for a chemical laboratory. The solution purification device comprises a mounting plate and a base connected with the bottom of the mounting plate, the mounting plate is connected with an adding tank, the bottom of the adding tank is connected with a control valve, and the other side of the mounting plate is connected with a swinging part; according to the silver-ammonia solution preparation device, the accuracy of silver-ammonia solution preparation can be effectively improved, ammonia water and silver oxide can fully react through a continuous shaking effect, and the silver-ammonia solution preparation device has the advantages that the accuracy of silver-ammonia solution preparation is improved; therefore, silver oxide precipitates and other incompletely reacted chemical components are prevented from remaining in the prepared solution, and the effect of purifying the silver-ammonia solution by the device is achieved.

The invention discloses antioxidant silver-coated copper powder and a preparation process thereof, and relates to the technical field of silver-coated copper powder. The process comprises the steps of copper powder pretreatment, two-step complexing silver coating, hydrophobic membrane forming and airflow powder mixing. The compactness and oxidation resistance of a silver layer on the surface of the copper powder are enhanced through two-step complexing, the oxidation resistance of the silver-coated copper powder is improved to a great extent, meanwhile, the cost of the treatment, complexing and silver plating processes of the copper powder is controlled to a low degree, and the cost is reduced by combining organic passivation treatment; and the preparation cost of the silver-coated copper powder is low, batch production of the silver-coated copper powder is facilitated, and the market competitiveness is improved.

This invention belongs to the field of meat preservation films in food packaging materials, specifically relating to a preservation film material. The invention employs a chemical precipitation method to deposit the metallic antibacterial agent silver oxide onto plant fibers, and adds tannic acid, a polyphenolic compound with excellent antioxidant properties, mixed with a polymer matrix and solvent to prepare a spinning precursor solution. Then, an antibacterial and antioxidant film is prepared by electrospinning. When applied to meat preservation, it can extend the shelf life of chilled meat by more than 6 days. This invention utilizes the reduction of silver ions released from silver oxide to nano-silver under the action of tannic acid, achieving a synergistic effect of antibacterial and antioxidant properties with tannic acid. It also possesses good mechanical properties and hydrophobicity, showing broad application prospects in the meat and fruit / vegetable preservation industries.

The invention discloses a radioactive methyl iodide filtering material and a preparation method thereof, and belongs to the technical field of nuclear fuel waste gas treatment. The preparation method comprises the following steps: preparing a nitrogen-carbon skeleton from a reaction monomer through a cross-linking reaction; dispersing the nitrogen-carbon skeleton, a silver nitrate solution and an ionic liquid in water to obtain a mixed solution; the mixed solution is subjected to nano silver oxide in-situ growth in the environment of ultraviolet lamp irradiation and ultrasonic oscillation, and the radioactive methyl iodide filtering material is prepared. The radioactive methyl iodide filtering material is a nano silver oxide in-situ loaded nitrogen-carbon skeleton composite material and can be used as a radioactive methyl iodide filtering and storing material, efficient adsorption of radioactive methyl iodide is achieved through the chemical adsorption effect of nano silver oxide and methyl iodide, meanwhile, it is ensured that the adsorption process is stable and irreversible, and the radioactive methyl iodide filtering material can be used for filtering and storing radioactive methyl iodide. And no methyl iodide is released in a deep stratum treatment environment.

The invention discloses low-temperature non-pressure rapid sintering silver paste and a preparation method thereof, and belongs to the technical field of electronic component packaging materials. The silver paste comprises the following components in percentage by weight: 75wt%-82wt% of silver sheet particles, wherein the silver sheet particles comprise silver sheet powder particles with sheet structures and fatty acid and / or fatty acid silver layers covering the surfaces of the silver sheet powder particles; the modified silver oxide comprises silver oxide particles, a silver particle layer coating the outer surfaces of the silver oxide particles, and a fatty acid layer coating the outer surface of the silver particle layer; the sintering silver paste comprises the following components in percentage by weight: 20-30% of silver paste and 8-20% of organic solvent, the organic solvent is a mixed solution of terpilenol and 2-ethyl-1, 3-hexanediol, and the sintering silver paste does not need a pre-baking step and can be rapidly sintered at low temperature without pressure. The packaging process of connection of the chip and the metalized substrate is simplified, the production efficiency is improved, and the manufacturing cost is reduced.

The invention discloses a colorimetric detection method for daucoside based on enhanced octahedral silver oxide laccase activity and application, and belongs to the technical field of agricultural product safety detection. According to the present invention, the nucleic acid aptamer capable of being specifically combined with the danioside is adopted as the original recognition element, and the colorimetric detection method for enhancing the activity of the octahedral silver oxide laccase by using the nucleic acid aptamer is constructed, and is used for rapid danioside detection; the method is high in sensitivity and strong in specificity, the lowest detection limit of the droomcorn glycoside is 0.0743 mu g / mL, the color change can be distinguished by naked eyes, the method has the advantages that the operation is simple and convenient, the reaction is rapid, large-scale instruments are not needed and the like, the recovery rate in a sorghum sample reaches 89.66%-100.87%, and the method is suitable for on-site screening of the droomcorn glycoside in practical samples such as sorghum.

The present application relates to silver powder preparation technical field, specifically to a kind of solar cell back silver paste silver powder preparation method;The silver powder preparation method includes: preparation silver powder, preparation pretreatment silver powder and preparation solar cell back silver paste silver powder three processes;In the present application, glycerol is used as reducing agent, which plays the dual role of reducing agent and emulsifier, can effectively regulate the size of silver powder, reduce the amount of dispersing agent;In addition, silver nitrate solution and sodium hydroxide solution are used as raw materials in the present application, and silver oxide is used as intermediate, and the process design of in-situ reduction is used, so that the particle dispersion of silver powder is good in the reaction process, and the particle size distribution is uniform;In addition, the chemical bond formed by silver powder and the polymer grafted on its surface will be broken under heating conditions, that is, while improving the dispersion performance of silver powder, the conductivity of silver powder will not be affected, effectively ensuring the dispersion performance and conductivity of silver powder.

The utility model relates to low-radiation easy-to-clean glass and multi-layer glass thereof. According to the low-radiation easy-to-clean glass, a silicon oxide target material is sputtered by radio frequency, gas nitrogen is introduced, and a silver target material is sputtered by direct current, so that nitrogen-doped silicon silver oxide is deposited on a clear glass base layer in a mixed plating manner. Therefore, according to the low-radiation easy-to-clean glass, the oxidation problem can be avoided, meanwhile, the electric conductivity, the hardness and the water drop angle are improved, and the hemispherical radiance is reduced.

The invention provides a special coating agent for an antibacterial lamp tube and a preparation method thereof, and relates to the technical field of antibacterial material preparation, the preparation method comprises the following steps: carrying out heating dissolution treatment on an initial mixture through a constant temperature heating device to form a dissolved mixed solution, carrying out cooling treatment on the dissolved mixed solution through a cooling device to form a cooled mixture, the heating and dissolving treatment adopts ultrasonic-assisted dispersion, and the cooling treatment adopts a pH online monitoring and dynamic adjustment combined mode. According to the special coating agent for the antibacterial lamp tube and the preparation method of the special coating agent, the uniformity and stability of the coating agent are ensured by accurately controlling the proportions of the components such as the nanoscale silver oxide, the titanium dioxide powder and the nanoscale zinc oxide and adopting technologies such as ultrasonic-assisted dispersion and constant-temperature heating. And the fine preparation process is beneficial to improving the antibacterial performance and the photocatalytic effect of the antibacterial lamp tube.

The present invention discloses a kind of high-transmittance wear-resistant antibacterial dry granules, glaze, ceramic tile and preparation method thereof, and belongs to the field of building materials technology. The raw materials of the high-transmittance wear-resistant antibacterial dry granules of the present invention include by mass: 15-25 parts of potassium feldspar, 12-20 parts of lithium feldspar, 6-12 parts of dolomite, 4-12 parts of calcined earth, 2-10 parts of corundum, 0.2-1.0 parts of silver oxide, 0.2-1.0 parts of tungsten trioxide, 2-6 parts of zinc oxide, 20-30 parts of cubic boron nitride, and 5-15 parts of aluminum nitride; the high-transmittance wear-resistant antibacterial dry granules are obtained by firing and heat-insulating the raw materials at 1500-1600°C for 30-60 minutes and then quenching, and the water used for quenching is circulating cooling water. The glaze layer and high-transmittance wear-resistant ceramic tile prepared by the high-transmittance wear-resistant antibacterial glaze added with the high-transmittance wear-resistant antibacterial dry granules of the present invention have good transparency and color development, high hardness and wear resistance, and antibacterial properties.

The invention discloses a micro-nano structure porous silver surface enhanced Raman substrate and a preparation method thereof, belongs to the technical field of molecular recognition and nano preparation, and provides a preparation method of a novel silver porous structure based on a silver oxide thermal decomposition principle. According to the method, an atomic layer deposition (ALD) technology is innovatively adopted to construct a protective layer on the surface of a material, the agglomeration behavior of silver particles in the high-temperature process is effectively inhibited, and therefore the original micro-nano structure is completely reserved, the silver micro-nano structure prepared through the technology has excellent SERS performance, and a new solution is provided for preparation of a high-performance SERS substrate.