32 results about "Reducing capacity" patented technology

The invention relates to a method for degrading nitrobenzene pollutants by using a humus-synergistic enhanced Fenton system, which comprises the following steps: adding a peroxide oxidant, a Fe (III) catalyst and a water-soluble organic reducing agent with Fe (III) reducing capacity into soil containing nitrobenzene pollutants, uniformly mixing to form a Fenton system, adding humus, and uniformly mixing to form the nitrobenzene pollutants. Mixing and reacting to obtain the soil for degrading the nitrobenzene pollutants. Compared with the existing Fenton technology, the method has the advantages that the overall catalytic efficiency can be improved, the initial pH does not need to be adjusted, and the method is green, safe and environmentally friendly.

The invention relates to a copper-based catalyst for catalyzing acetylene hydrochlorination and a preparation method and application thereof, the copper-based catalyst comprises a carrier, a phosphine-containing ligand and a copper-containing stable metal precursor; the molar ratio of the stable-state metal precursor to the phosphine-containing ligand is (2: 1)-(16: 1), and the mass of copper in the copper-containing stable-state metal precursor is 5-10% of the mass of the copper-based catalyst. For a copper-based catalyst containing ligand dimethyl phosphine oxide, when reaction gas contains a certain amount of water vapor, the activity and selectivity of the catalyst are still maintained at a relatively high level; when the reaction gas contains a certain amount of hydrogen, the influence on the activity and selectivity of the catalyst is small, which indicates that the catalyst has excellent hydrophobicity and reduction resistance in the acetylene hydrochlorination reaction, thereby not only enhancing the generation efficiency of the vinyl chloride monomer, but also prolonging the service life of the catalyst and lowering the production cost.

The invention discloses a preparation method of a zero-valent iron reduction material with micro-nano size and water stability, and belongs to the field of underground water pollutant degradation materials. The method comprises the following steps: 1) uniformly mixing micron-sized zero-valent iron powder and hexadecyl trimethoxy silane, and carrying out mechanical ball milling; and 2) cleaning the material with a cleaning agent, and drying to obtain the zero-valent iron reduction material with micro-nano size and water stability. According to the preparation method, a mechanical ball milling method and a hexadecyl trimethoxy silane surface modification method are utilized to cooperate, so that micro-nano size and surface hydrophobicity of the zero-valent iron are stabilized, agglomeration and passivation of the zero-valent iron in water are inhibited, and the reduction activity and water stability of the zero-valent iron material are improved; the reducing capacity of the material on pollutants such as halogenated hydrocarbon and heavy metal in water is remarkably improved, the material can be kept stable in water for a long time, the technical problems that the micro-nano zero-valent iron reducing material is prone to inactivation and difficult to store are solved, and waste of material resources can be reduced.

The invention provides a preparation method of superfine silver powder for photovoltaic cell silver paste, the preparation raw materials comprise an oxidizing agent, a reducing agent, a dispersing agent and a pH regulator, and the method comprises the following steps: preparing a reducing agent solution containing the pH regulator, placing the reducing agent solution in an oil bath environment, and rapidly stirring for a period of time to obtain the superfine silver powder for the photovoltaic cell silver paste. And then, an oxidizing agent solution added with a dispersing agent solid is dropwise added into the mixture for a reduction reaction, the reacted solution is rapidly cooled through a room-temperature water bath, and superfine silver powder particles are obtained through centrifugation. The method has the advantages that the glucose which is low in cost, rich in raw material, mild in reducing capacity and environmentally friendly is selected as a green reducing agent, the waste liquid treatment cost and toxicity are reduced, the toxic reducing agent in chemical synthesis can be fully replaced, and by adjusting the molar ratio of the glucose to the oxidizing agent and the dosage of the pH adjusting agent, the waste liquid treatment cost is lowered. The particle size and the dispersity of the metal powder can be effectively controlled in the production process, and finally the micron-sized superfine silver powder particles with the uniform particle size and the controllable shape can be obtained.

The invention belongs to the technical field of biology, and particularly relates to a novel antioxidant peptide and application thereof, and the amino acid sequence of the novel antioxidant peptide is shown as SEQ ID NO.1. The antioxidant peptide is high in biological activity, has relatively high scavenging capacity on DPPH. Free radicals and ABTS. Free radicals, has relatively high reducing capacity on Fe < 3 + >, and has wide application in the aspects of preparing antioxidant medicines, foods or cosmetics and the like. Meanwhile, the antioxidant peptide is short in sequence, easy to synthesize and suitable for large-scale production and application.

The invention relates to an application of a composition of herba houttuyniae and traditional Chinese medicines in preparation of food, medicines or health care products with an anti-oxidation effect. The composition comprises the following raw materials: houttuynia cordata, paniculate swallowwort root, dandelion, platycodon grandiflorum, American ginseng, bamboo fungus, exocarpium citri grandis, honeysuckle, momordica grosvenori, lily, red dates, lophatherum gracile, flos farfarae, scaphium scaphigerum, liquorice, plantain herb, medlar and mint. The composition has high in-vitro antioxidant activity, the highest scavenging rate of the composition to DPPH free radicals with the concentration of 50 mg / L can reach 89.04%, the highest scavenging rate to hydroxyl free radicals (OH.) is 30.65%, and the highest iron oxidation reduction capability (FRAP) is 0.93, so that the composition has the effects of retarding oxidative stress, resisting aging and preventing and treating chronic diseases, and can be used for preparing antioxidant drugs, health care products or food.

The present application relates to a kind of preparation and optimization of Ce-based adsorbent of high-efficiency Cr (VI) removal, which is prepared by calcination treatment with metal organic framework as precursor, the obtained Ce-based adsorbent has higher specific surface area, and a large number of hydroxyl functional groups are introduced on the surface;After optimization, the content of Ce (III) and oxygen vacancy of adsorbent increases, further improves the adsorption capacity and reduction capacity of Cr (VI). The Ce-based adsorbent prepared in the present application belongs to environmentally friendly material, which has the advantages of simple production process, good adsorption performance, wide working pH range, strong stability, multiple recycling and the like. At the same time, the obtained adsorbent in the present application is applied to Cr (VI) containing wastewater treatment, can realize high-efficiency adsorption of Cr (VI) and reduce high-toxicity Cr (VI) to low-toxicity Cr (III), can effectively solve the problem of chromium pollution in water, has great application potential.

The application relates to the technical field of organic synthesis, and discloses an organic sulfinate salt composition, a preparation method and application thereof and the composition. The preparation method comprises the following steps: contacting a monovalent organic sulfinate salt shown in formula I with a divalent metal salt or a salt of a metal with a valence higher than two under the condition that a poor solvent exists; the organic sulfinate salt prepared by the method has high yield and high purity, almost no sulfinate salt by-product is generated, the method has the advantages of simple operation, safe and easily-obtained reaction raw materials, rapid reaction, no need of recrystallization, the target product can be obtained through filtration after the reaction, less solvent is used, the cost is low, etc., the composition has the beneficial effects that the composition is more stable than a corresponding sodium salt, the sulfur odor is reduced, the composition has strong reducing capacity, etc.

The invention belongs to the technical field of noble metal catalyst preparation, and relates to a preparation method of high-purity potassium chloroplatinite. According to the invention, potassium nitrite is used as a protective medium of platinum (IV) ions and is compounded with a reducing agent, the reducing agent with stronger reducing capacity participates in reduction of platinum (IV) ions firstly, even if the reducing agent is excessive, nitrite can be preferentially combined with the reduced platinum (IV) ions to generate Pt (NO2) 4 < 2-> as the nitrite has stronger coordination capacity on the platinum (IV) ions, so that the platinum (IV) ions can be converted into platinum (IV) 4 < 2->, and the platinum (IV) 4 < 2-> can be converted into platinum (IV) 4 < 2->. The PtCl4 < 2-> is converted into PtCl4 < 2-> under an acidic condition, so that introduction of impurities and excessive reduction of platinum are avoided; the potassium chloroplatinite is prepared by adding a saturated potassium chloride solution and concentrating and crystallizing. The method improves the purity and yield of potassium chloroplatinite, does not use toxic and harmful substances, and is simple and convenient to operate.

The invention discloses staphylococcus calves HRB1 with an antioxidant function and application thereof, and belongs to the technical field of food processing. In order to solve the problems that the product quality is reduced due to over oxidation of lipid and protein of a fermented meat product and the safety of a synthesized antioxidant is relatively low, the invention provides staphylococcus calvus HRB1 with an antioxidant function and a leavening agent containing the staphylococcus calvus HRB1 and application of the staphylococcus calvus HRB1 to the fermented meat product. The staphylococcus calf HRB1 provided by the invention has better growth ability under H2O2 stress, has higher scavenging ability and reducing ability on DPPH free radicals, hydroxyl free radicals and superoxide free radicals, and is proved to have higher antioxidant ability; the provided leavening agent has the function of reducing the content of thiobarbituric acid and carbonyl, and the purposes of reducing nutrition loss, poor flavor and spoilage caused by excessive oxidation of lipid and protein are achieved.

This invention discloses a highly efficient and low-cost method for preparing g-C3N4-supported Fe and Mn bimetallic catalysts, belonging to the field of catalyst technology. This invention uses manganese ferrite as the bimetallic source, combined with a one-step calcination method using melamine, to simultaneously achieve the synthesis of g-C3N4 and the loading of Fe and Mn. During calcination, manganese ferrite decomposes into FeO. x and MnO x Nanoparticles form strong coordination bonds with the nitrogen sites of g-C3N4, enabling atomic-level dispersion of metals and inhibiting metal ion migration. Through the bimetallic synergistic effect of Fe and Mn, the redox capacity of the catalyst can be significantly improved. Manganese ferrite, through its unique thermal decomposition characteristics, bimetallic synergistic effect, and strong chemical bond with g-C3N4, achieves efficient exposure of active sites, significant improvement of redox capacity, and effective inhibition of metal dissolution. It also has the advantages of high efficiency, low cost, and low risk of secondary pollution.

The application belongs to the field of organic polymer synthesis and its application, and particularly relates to a low-valence manganese catalyst and its preparation and application in perfluoropolyether modified siloxane. The valence of manganese in the low-valence manganese catalyst is -1, and compared with zero-valence or +1 and +3 valence manganese, the reduction ability is stronger, the catalytic activity is higher, and the catalytic efficiency of the manganese catalyst is further improved. The fingerprint-resistant adhesive prepared by using the perfluoropolyether modified siloxane has excellent characteristics of hydrophobic and oleophobic, high transparency and good friction resistance. The preparation method is simple in operation, simple in process and convenient for industrial production. Meanwhile, the raw materials are cheap and easy to obtain, and the cost is low, so the application is conducive to popularization and application in production practice.

The invention discloses a reductant performance diagnosis process and degassing equipment in a titanium dioxide bleaching process, relates to the technical field of titanium dioxide production, and comprises the following steps; S1: accurately measure 1-2 ml reductant sample and add it to a conical flask; S2: add 50 ml of distilled water treated by a degassing equipment and at room temperature to the conical flask, wherein the degassing equipment is mainly used for gases dissolved in distilled water; S3: then drip sulfuric acid with a mass fraction of 20% to the conical flask, and control the pH of the solution system to be 1-3; S4: then titrate with a potassium permanganate standard solution with a concentration of 0.4921 mol / l, from colorless titration to red at the end point, and the end point is that the color does not fade for 30 seconds, and the titration volume V is recorded; S5: evaluate the reducing ability of the reductant by multiplying the concentration of the potassium permanganate standard solution by the volume divided by the sampling volume. The process is simple and can quickly and accurately detect the reducing ability of the reductant.

The present application provides a long-life low-friction grease composition and a preparation method thereof. The grease composition comprises the following raw materials by weight: 20-35 parts of high-alkaline calcium sulfonate, 50-65 parts of base oil, 2-6 parts of diisocyanate, 1-5 parts of p-toluidine, 0.5-2 parts of urea, 1-4 parts of conversion agent, 1-2 parts of calcium carbonate, 1-2 parts of calcium hydroxide, 1-4 parts of small-molecule acid, 3-5 parts of fatty acid, 0.5-2 parts of solid friction-reducing agent, 0.5-3 parts of antioxidant, 0.5-2 parts of surfactant, and 0.5-2 parts of passivator. The grease composition has excellent friction-reducing capacity and extreme pressure performance, and has a long service life.

The invention discloses a preparation method and application of a Ni / C-coated MgH2 composite hydrogen storage material, and relates to a preparation method and application of a hydrogen storage material. The invention aims to solve the problems of high dehydrogenation temperature, poor reversibility, insufficient cycle stability, complex preparation process and limitation of terminal group regulation of the hydrogen storage material prepared in the prior art. According to the invention, by introducing a Ni / C co-bonding structure, the hydrogen storage and recovery performance is shown in the aspects of H2 dissociation and H diffusion, the potential barrier energy of H2 dissociation can be effectively reduced under the catalytic action of Ni, and the diffusion performance of H can be improved by doping C, so that the catalytic hydrogen storage performance is improved. The method comprises the following steps: 1, preparing a Ni-MOF material; 2, preparing a Ni / C catalyst; and 3, preparing the composite hydrogen storage material. The Ni / C-coated MgH2 composite hydrogen storage material is used as a hydrogen storage material. The Ni / C-coated MgH2 composite material prepared by the invention shows excellent cycling stability, and capacity fading is reduced.

The invention provides a method for preparing a supported nano noble metal by introducing a closed borane cluster into an MXene matrix, and belongs to the technical field of nano noble metal materials. A closed borane cluster is introduced into an MXene matrix to prepare a supported nano noble metal, the closed borane cluster (a weak reducing agent) with weak reducing capacity is pre-arranged on the surface of MXene in a solvent removal in-situ nucleation growth mode, then noble metal salt is introduced, in-situ reduction of the noble metal salt on the surface of MXene can be achieved, the noble metal salt is attached to the surface of MXene, and the supported nano noble metal is prepared. Controllable reduction of precious metal ions is achieved, and then the structure of the material is stabilized through high-temperature annealing treatment, so that the load type nanometer precious metal material with the small size and the high dispersity is obtained.

The invention discloses carbon-sulfur composite modified nano-iron as well as a preparation method and application thereof, and according to the method, through carbon-sulfur co-doping modification, the anti-aging, anti-oxidation and anti-passivation properties of the nano-iron are remarkably improved. The modification process comprises two preparation modes of a solid phase method and a water phase method, oak chips and other biomass materials are adopted as a carbon source, and elemental sulfur or sodium sulfide and the like are adopted as a sulfur source. The carbon-sulfur composite modified nano-iron (C-S-nZVI) prepared by the method has excellent stability and reducing capacity in the water treatment process, and can show an excellent removal effect in both aerobic and anaerobic environments. Under different water quality conditions, the removal rate of the modified nano-iron to Cr (VI) can reach 95% or above, the durability and reaction efficiency of the nano-iron can be effectively improved, and the method has the advantages of being low in cost and easy and convenient to operate, can be effectively applied to the fields of groundwater remediation, industrial wastewater treatment, drinking water purification and the like and has wide application prospects.

The invention provides a method for synthesizing 2, 4, 6-trifluorobenzylamine through a one-pot method, and relates to the technical field of chemical synthesis. According to the method, the 2, 4, 6-trifluorobenzylamine is synthesized by taking the 2, 4, 6-trifluoro-3, 5-dichlorobenzonitrile as a raw material through a one-pot method, so that the method is more beneficial to economy and environmental friendliness. Compared with organic carboxylic acid and organic sulfinic acid, the organic sulfonic acid disclosed by the invention is more favorable for enhancing the reducing capacity of palladium on carbon, so that the yield of 2, 4, 6-trifluorobenzylamine is higher.

The application discloses a method for preparing a deuterated compound through a boron-type reduction reaction under a transition metal-free condition and the deuterated compound obtained through the method. The method comprises the following steps: under the protection of an inert atmosphere and under normal temperature and pressure, de-aromatic deuterization is performed on (hetero)arene through an electro-optical catalysis method in the presence of a deuterated reagent, so that the deuterated compound is obtained. The method directly reduces an organic photocatalyst which is independent of a transition metal into a corresponding anion radical through an electro-optical catalysis synthesis technology, and the anion radical has strong reduction capacity after being excited by light, so that boron-type reduction deuterization of inert (hetero)arene is realized. The method is more moderate, has fewer side reactions, and has high yield of a target product.

The invention discloses a heterotrophic nitrification-aerobic denitrification bacterium and application thereof in sewage denitrification treatment, and belongs to the technical field of microorganisms. The heterotrophic nitrification-aerobic denitrification bacterium is Enterobacter asbriae WZCH, is preserved in the China Center for Type Culture Collection on June 16, 2025, and has a preservation number of CCTCC (China Center for Type Culture Collection) NO: M 2025272. The invention further discloses a preparation method of the heterotrophic nitrification-aerobic denitrification bacterium. The strain has relatively high reducing capacity, can convert ammoniacal nitrogen, nitrate nitrogen and the like in sewage into gaseous nitrogen, is free of nitro nitrogen accumulation, is green and environment-friendly, and has relatively high practical application value.

The invention discloses a back polishing additive for reducing alkali consumption as well as a preparation method and application of the back polishing additive. The back polishing additive comprises the following components in percentage by mass: 0.01-0.5% of a catalyst containing a nitrobenzene structure, 0.1-1% of a defoaming agent, 0.5-1.5% of a preservative and the balance of water. The additive can perform polishing reaction under the condition that the alkali concentration or consumption is lower than the alkali concentration or consumption required by a conventional additive, the additive has a larger alkali reducing capacity compared with the conventional additive, in addition, after the additive is used for performing the alkali polishing reaction, the surface tower footing flatness of a silicon wafer is good, the reflectivity is higher, the polishing effect is better, and the service life of the silicon wafer is prolonged. And the efficiency of the battery is remarkably improved.

The invention discloses lucid ganoderma melanin nano-selenium as well as a preparation method and application thereof. The preparation method of the lucid ganoderma melanin nano-selenium comprises the following steps: preparing a lucid ganoderma melanin solution, uniformly mixing the lucid ganoderma melanin solution with Na2SeO3, SeO2 and H2SeO3 respectively, then adding a Vc solution, stirring to form an orange red solution, dialyzing, and freeze-drying to obtain the lucid ganoderma melanin nano-selenium. The lucid ganoderma melanin nano-selenium disclosed by the invention has anti-inflammatory, anti-oxidation and antibacterial properties, and has certain anti-oxidation capability in the aspects of DPPH., ABTS, hydroxyl free radicals and total reduction capability; the inhibited bacteria comprise escherichia coli, staphylococcus aureus and bacillus subtilis; the method can be used for keeping shiitake mushrooms fresh.

The invention discloses sodium borohydride modified coal gangue and application of the sodium borohydride modified coal gangue in Cr (VI) sewage treatment. According to the modified coal gangue, sodium borohydride is used as a reducing agent to carry out reduction treatment on an iron element in the coal gangue to form metal sites with high reaction activity, and then chromium ion curing is carried out, so that the adsorption and reduction capacities of the coal gangue are effectively improved, and the application effect of the modified coal gangue in Cr (VI)-containing sewage is remarkably improved; meanwhile, the modified coal gangue can be repeatedly used, the sewage treatment cost is reduced, high economical efficiency and sustainability are achieved, a novel, efficient and economical material is provided for treatment of Cr (VI)-containing sewage, and wide application prospects are achieved.

The invention discloses a modified biochar-loaded vulcanized nano zero-valent iron material and a preparation method and application thereof, and belongs to the technical field of sewage treatment.The surface of the prepared modified biochar-loaded vulcanized nano zero-valent iron material contains tert-butylphenyl groups, the hydrophobicity of the surface of the biochar material can be enhanced, and the service life of the biochar material is prolonged. The adsorption efficiency on bromophenol substances is improved; meanwhile, the nanoscale zero-valent iron is subjected to vulcanization treatment, a ferrous sulfide shell can be formed on the surface of the nanoscale zero-valent iron, the nanoscale zero-valent iron is protected from being oxidized, and the high reactivity of the nanoscale zero-valent iron is fully exerted; according to the material prepared by the method disclosed by the invention, the nano zero-valent iron is fully dispersed on the surface layer of the carrier, so that the agglomeration phenomenon of the nano zero-valent iron is effectively avoided, the reducing capacity of the nano zero-valent iron is fully exerted, and the degradation of bromophenol substances is promoted.

The invention discloses a reducing agent performance diagnosis process in a titanium dioxide bleaching process and degassing equipment, and relates to the technical field of titanium dioxide production. The method comprises the following steps: S1, accurately measuring 1-2ml of a reducing agent sample, and adding into a conical flask; s2, adding 50ml of distilled water which is treated by degassing equipment and is at room temperature into the conical flask, wherein the degassing equipment is mainly used for dissolving gas in the distilled water; s3, sulfuric acid with the mass fraction of 20% is dropwise added into the conical flask, and the PH of a solution system is controlled to be 1-3; s4, titrating by using a potassium permanganate standard solution with the concentration of 0.4921 mol / l, and recording the titration volume V when the color does not fade in 30 seconds from colorless titration to red at the end point; and S5, multiplying the concentration of the potassium permanganate standard solution by the volume and dividing by the sampling volume to evaluate the reducing capacity of the reducing agent. The process is simple and convenient, and the reducing capacity of the reducing agent can be rapidly and accurately detected.

The application discloses a nosZ type Jiulongibacter A17 with N2O reduction capacity and application thereof. The Jiulongibacter A17 has a preservation number of GDMCC No:66268 and is preserved in the Guangdong Microbial Culture Collection Center on May 7, 2025. The strain is a new species of the Jiulongibacter genus. The novel Jiulongibacter A17 has strong N2O reductase activity and N2O reduction capacity. Therefore, the novel Jiulongibacter A17 has good application potential in reducing N2O gas emission.

The invention provides a furnace rear composite slagging agent and a preparation method thereof.The slagging agent comprises a main material system, an activating treatment agent and a foaming agent, and the main material system comprises, by mass, 45-60 parts of pre-melted calcium aluminate, 25-35 parts of aluminum oxide, 40-50 parts of calcium oxide and 20-35 parts of elemental aluminum; the addition amount of the activating treatment agent is 5-12 parts, and the addition amount of the foaming agent is 1.5-4 parts. The method comprises the following steps: (a) lattice activating treatment; (b) raw material primary mixing; (c) activating agent treatment; (d) foaming agent adding; the core target of forming a high-performance casting powder layer in the tapping process under the condition of not depending on a refining furnace is finally achieved through lattice activation for accelerating the reaction process, an activating treatment agent for strengthening the reducing capacity, a foaming system for constructing a protective barrier, a pore-forming process for optimizing the application performance and component pre-combination for guaranteeing the reaction stability.

The present application discloses a method for degrading halogenated organic pollutants using reduced humic acid. The method of the present application can make full use of the abundant HA in the natural environment, and combined with chemical reduction means, it has potential application value. The HAred system is constructed by utilizing the reducing ability and reduction-oxidation multiple cycle ability of HAred to remove HOCs from (underground) contaminated water bodies, achieve chemical remediation of contaminated water bodies, reduce the risk of secondary pollution, and provide new ideas for the current treatment of HOCs-contaminated water bodies; not only that, the method of the present application utilizes the reduction system formed by HAred, which can gradually and completely dehalogenate HOCs under aerobic conditions, and has low-cost, green, and efficient removal capabilities. The method of the present application is simple and convenient, easy to implement, and cost-saving.

The invention relates to a solid acid catalyst, preparation and application of the solid acid catalyst in preparation of ethylene by catalyzing low-temperature dehydration of ethanol. The active component of the catalyst comprises two parts: (1) an active component heteropolyacid and (2) a carrier composite metal oxide. The solid acid catalyst is prepared by taking the composite metal oxide with an oxygen transfer function as a carrier and loading heteropoly acid, reduction of heteropoly acid by alcohol and / or aldehyde is inhibited through lattice oxygen, a crystal phase of an active component is maintained, and the stability of the catalyst is improved. The preparation conditions of the catalyst are mild, the process is stable and controllable, and the prepared catalyst has the advantages of being low in reaction temperature, high in activity, good in stability, high in reduction resistance and the like.

The invention provides a morphology-controllable method for preparing silver-coated copper powder. The morphology-controllable method comprises the following steps: S1, dispersing copper powder in water to obtain a copper powder suspension; s2, a plurality of parts of silver nitrate are dissolved in water, different complexing agents are added, and a plurality of parts of different silver complexing solutions are obtained; s3, respectively dissolving different reducing agents in water to obtain a plurality of parts of different reducing agent solutions; s4, in a stirring state, simultaneously dropwise adding a first silver complexing solution and a first reducing agent solution into the copper powder turbid liquid, then simultaneously dropwise adding a second silver complexing solution and a second reducing agent solution, sequentially and continuously dropwise adding until an Nth silver complexing solution and an Nth reducing agent solution are completely dropwise added, and continuously stirring and reacting; and S5, carrying out solid-liquid separation, and cleaning and drying the solid to obtain the silver-coated copper powder. According to the method, the silver deposition rate is regulated and controlled by matching complexing agents and reducing agents with different complexing capacities and reducing capacities, so that the silver-coated copper powder with different morphologies such as rough surfaces or smooth and compact surfaces can be controllably prepared.