80 results about "Potassium cyanide" patented technology

The invention discloses a high-crystallinity carbon nitride nanosheet based on a heterogeneous fused salt interface as well as a preparation method and application thereof, and belongs to the technical field of photocatalysis. The preparation method comprises the following steps: carrying out hydrothermal reaction on a melamine solution or a melamine mixed solution to obtain a supramolecular precursor; mixing the supramolecular precursor with heterogeneous molten salt, and calcining in a protective atmosphere to obtain the high-crystallinity carbon nitride nanosheet; the heterogeneous molten salt is a mixture of potassium thiocyanate and potassium chloride. The heterogeneous fused salt interface is used as a reaction environment, ideal interface driving force is provided for directional assembly of a precursor and formation of a high-crystallization carbon nitride nanosheet, then preparation of a carbon nitride photocatalytic material with a controllable structure and excellent performance is achieved, and an illumination reaction is carried out in an air environment to catalyze production of hydrogen peroxide.

This invention discloses a method for recycling and reusing cyanide silver plating wastewater. The method includes four steps: separation of silver ions and cyanide, concentration of the silver-containing solution, cyanide concentration, electrolysis and residual liquid recycling, and reuse of reclaimed water. This method achieves the separate recycling and reuse of silver, cyanide, and water. The silver-containing solution is electrolyzed to obtain metallic silver, the cyanide concentrate's main component is sodium cyanide or potassium cyanide solution, and the reclaimed water with a conductivity below 20 μS / cm is reused in the production line. This method not only maximizes resource utilization and reduces wastewater discharge, but also separates most of the cyanide from the silver-containing solution during electrolysis, making the electrolysis process safer. Furthermore, the residual liquid after electrolysis can be recycled multiple times for the separation and concentration of silver ions and cyanide.

The invention relates to the technical field of oxygen free radical detection, in particular to a manufacturing process of a portable and reliable oxygen free radical detector. Comprising the following steps: mixing superoxide dismutase, potassium ferricyanide, an isothiazolinone preservative, hexammine ruthenium chloride, polyethylene glycol octylphenol ether, trehalose and bovine serum albumin, and uniformly stirring to prepare an enzyme preparation; mixing an enzyme preparation with the high polymer material solution to form reagent layer slurry with viscosity; uniformly coating the reagent layer slurry on a substrate material, and drying; printing an electrode material on the substrate material to form a working electrode and a counter electrode; the silver electrode is placed in an electrolyte containing chloride ions, potential is applied, the silver surface is subjected to a chlorination reaction, and a silver / silver chloride electrode is formed; covering the reagent layer above the electrode, tightly combining the reagent layer with the electrode in a sticking or hot pressing manner, and cutting to obtain the test paper; the prepared portable oxygen free radical detector can be used for conveniently and efficiently detecting oxygen free radicals of a human body at low cost.

The invention discloses a preparation method of a potassium-doped nitrogen oxidation phosphorescent catalyst, and belongs to the technical field of photocatalytic material preparation. The method comprises the following steps: by taking phosphorus oxynitride and potassium thiocyanate as raw materials, grinding and mixing, carrying out molten salt reaction at 400-600 DEG C for 1-5 hours, and cooling, washing and drying a reaction product to obtain the potassium-doped phosphorus oxynitride crystal. The method is simple in process, mild in reaction condition, low in cost and easy for large-scale production. Through potassium element doping, the visible light absorption range of phosphorus oxynitride is effectively widened, the recombination rate of photo-induced electron-hole pairs is remarkably reduced, and the carrier separation and transmission efficiency is improved, so that the photocatalytic activity of the material is greatly improved. The prepared K-PON photocatalyst has wide application prospects in the fields of photocatalytic reduction of uranium-containing wastewater, degradation of organic pollutants, energy conversion and the like.

The application relates to the technical field of sodium ion battery negative electrode materials, and discloses a preparation method and application of a copper-iron sulfide / nitrogen-doped porous carbon composite material, which comprises the following steps: (1) mixing copper salt, potassium ferricyanide, a nitrogen source and polyethylene glycol, and obtaining a copper-iron Prussian blue precursor after ball milling; (2) pyrolyzing the copper-iron Prussian blue precursor under an inert atmosphere, washing and removing impurities, and drying to obtain an intermediate product; and (3) heat-treating the intermediate product and a sulfur source under an inert atmosphere to obtain a copper-iron sulfide / nitrogen-doped porous carbon composite material. Through the synergistic effect of the double-metal sulfide and the nitrogen-doped porous carbon composite, sodium ions with a larger ion radius can be more easily embedded and de-embedded in the interlayer spacing, meanwhile, abundant active sites are provided to enhance ion storage, so that the sodium ion battery has outstanding rate performance and stable cycle performance.

The invention provides a Prussian blue analogue derivative Ce-doped Co-based catalyst and a preparation method thereof.The preparation method comprises the steps that cerium salt and cobalt salt are dissolved and mixed to prepare a mixed solution, cobalt potassium cyanide solution is prepared, the cobalt potassium cyanide solution is dropwise added into the mixed solution, and the Prussian blue analogue derivative Ce-doped Co-based catalyst is obtained after the cobalt potassium cyanide solution is dropwise added into the mixed solution; the Ce-doped Co-based catalyst is prepared by dropwise adding a mixed solution or a cobalt cyanide potassium solution, adding polyvinylpyrrolidone into the mixed solution or the cobalt cyanide potassium solution before dropwise adding to further regulate and control the reaction rate, carrying out stirring reaction and aging to obtain a metal organic framework precursor with an irregular morphology, and finally calcining to obtain the Ce-doped Co-based catalyst. Based on earlier-stage scientific achievements, when cobalt salt is additionally added to regulate and control the proportion of Ce and Co elements, it is accidentally found that when other cobalt salt and cerium salt coexist, Co-Co coordinated Ce-doped irregular-morphology Prussian blue analogues can be formed, and under the specific Ce and Co element proportion condition, the Prussian blue analogues can be used for preparing the Prussian blue analogues with the Co-Co coordinated Ce-doped irregular-morphology Prussian blue analogues with the Co-Co coordinated Ce-doped irregular-morphology Prussian blue analogues. And after being calcined, the catalyst has obviously higher ammonia decomposition conversion rate under a relatively low-temperature condition.

The invention discloses a bimetallic catalyst and a method for preparing polyether polyol by using the bimetallic catalyst, and relates to the technical field of polyether polyol preparation.The method comprises the steps that an ethylenediaminetetraacetic acid-crown ether covalent ligand is taken and added into absolute ethyl alcohol, a cobalt potassium cyanide solution is slowly and dropwise added, the mixture is stirred to be uniform, then a manganese-cobalt bimetallic catalyst precursor is slowly and dropwise added, stirring and centrifuging are conducted, and a precursor solution is obtained; and washing and drying in vacuum to obtain the manganese-cobalt bimetallic catalyst. Taking a manganese-cobalt bimetallic catalyst, adding the manganese-cobalt bimetallic catalyst into absolute ethyl alcohol, then adding the zinc-nitrogen co-doped charcoal, and carrying out ultrasonic treatment; stirring, centrifuging, alkali washing and vacuum drying are performed to obtain the bimetallic catalyst. The preparation method comprises the following steps: enabling propylene oxide to pass through a molecular sieve, uniformly mixing a bimetallic catalyst, 1, 4-butanediol and polyglycerol, and carrying out gas replacement; and adding epoxypropane, adding epoxypropane in batches when the pressure in the kettle is reduced to half of the initial pressure, and removing impurities to obtain the polyether polyol.

The invention discloses a preparation method of a cubic sulfide composite positive electrode material for a sodium-magnesium hybrid battery, which comprises the following steps of: 1, preparing a solution A from a cobalt source, preparing a solution B from cobalt potassium cyanide and a complexing agent, stirring the solution A and the solution B, standing, aging, washing and drying to obtain Co-PBA; 2, adding Co-PBA into a tris (hydroxymethyl) aminomethane buffer solution, adding a surfactant, carrying out ultrasonic treatment, adding dopamine hydrochloride, stirring, washing and drying to obtain a Co-PBA (at) PDA composite material; and 3, grinding the Co-PBA (at) PDA composite material, carrying out in-situ carbonization sintering, mixing with sulfur powder, and carrying out secondary sintering. The constructed polydopamine-coated Prussian blue analogue with the cubic structure is subjected to in-situ carbonization and vulcanization, the obtained CoS2 composite positive electrode material is uniform in particle size, stable in structure and excellent in electronic conductivity, the electrochemical performance including reversible capacity, cycling stability and rate capability is improved, and the CoS2 composite positive electrode material is suitable for a sodium-magnesium hybrid battery.

The invention relates to the field of compound preparation, and discloses a method for preparing alkali metal ferrocyanide by using iron powder as an iron source through a mechanochemical method, and the method comprises the following steps: mixing the iron powder with a solution containing alkali metal cyanide to obtain a mixture, and enabling the water content of the mixture to be not more than 50wt%, the alkali metal cyanide comprises sodium cyanide or potassium cyanide, the reaction time is short, the reaction temperature is low, the process of treating the raw materials in advance is omitted, hydrolysis of the sodium cyanide is reduced, side reactions are reduced, a small amount of NH3 is released in the complexing reaction process, and the method is suitable for industrial production. The yield is high, sulfate containing ferrocyanide is not produced as a byproduct, and unreacted metal residues are recycled. Compared with a traditional method, the method disclosed by the invention is low in production cost and high in added value of products, and has a relatively good industrial prospect.

The present application relates to oxygen precipitation and oxygen reduction electrocatalyst technical field, especially an accordion type carbon supported single atom-cluster catalyst and preparation method and application. The present application first synthesizes a kind of accordion type coordination polymer containing zinc and iron series metal (such as iron, cobalt, nickel), then it is etched using potassium ferricyanide or potassium cobalticyanide;Finally, pyrolysis is carried out under nitrogen atmosphere, forming an accordion type carbon supported single atom-cluster catalyst. The new catalyst has a unique accordion type layered structure, higher specific surface area, more active sites, and the main skeleton nitrogen-doped carbon of the catalyst has good conductivity, which can accelerate the mass transfer and charge transfer process of electrocatalytic reaction. The present application belongs to a new type of bifunctional catalyst, which can catalyze oxygen reduction reaction and drive oxygen precipitation reaction, meet the needs of rechargeable zinc-air battery, and show potential application prospect to replace commercialized noble metal catalyst.

The application discloses a processing technology of ethyl dicyanopropionate, and comprises the following specific steps: S1, preparing raw materials, storing liquid raw materials uniformly for standby, and placing solid raw material ethyl cyanoacetate in a humid environment with certain humidity to make it lump; S2, pre-treating the lumped ethyl cyanoacetate by using a pre-treatment device, and then crushing the lumped ethyl cyanoacetate after component separation; S3, mixing the ethyl cyanoacetate with a potassium cyanide solution, and then slowly adding a formaldehyde solution into the mixture for reaction; S4, separating the organic layer from the reaction liquid, extracting the water layer by using a solvent dimethyl sulfoxide, mixing the organic layers, and finally obtaining ethyl dicyanopropionate finished products after drying and desolventizing; in the step S2, the pre-treatment device comprises a storage mechanism, a high-frequency vibration device and an ejection mechanism; the processing technology of ethyl dicyanopropionate disclosed by the application has the effect of reducing the exposure amount of dust, thereby providing effective protection for the personal safety of workers.

The application discloses a preparation method and application of a manganese-based Prussian blue / reduced graphene oxide composite material, and the method comprises the following steps: uniformly stirring manganese sulfate monohydrate in a polyvinylpyrrolidone aqueous solution, adding a potassium ferricyanide aqueous solution while stirring, and then standing, centrifuging, washing and drying to prepare manganese-based Prussian blue; adding the manganese-based Prussian blue and ascorbic acid into a dispersion solution of reduced graphene oxide, stirring, transferring into a high-pressure reaction kettle for hydrothermal reaction, cooling to room temperature, centrifuging, washing and drying to obtain the manganese-based Prussian blue / reduced graphene oxide composite material with a three-dimensional framework structure. The manganese-based Prussian blue / reduced graphene oxide composite material is used for preparing a positive electrode material of a water-based zinc ion battery. The conductivity of the material and the contact area of the material are significantly improved, the diffusion rate of ions is promoted, and the storage sites of zinc ions are effectively improved.

According to the micro-plastic detection method, a glassy carbon electrode is used as a working electrode, a platinum wire electrode is used as a counter electrode, an Ag / AgCl electrode is used as a reference electrode, and potassium ferricyanide / potassium ferrocyanide is used as an electrochemical signal molecule; the method comprises the following steps: putting a three-electrode system into a KCl electrolyte solution which contains a microplastic and contains a potassium ferricyanide / potassium ferrocyanide probe, connecting the three-electrode system into an electrochemical workstation, then carrying out electric incubation on a solution system by using a cyclic voltammetry method, and detecting the concentration of the microplastic by using a differential pulse voltammetry method after incubation is finished. According to the invention, the electrochemical technology is innovatively used for micro-plastic detection. By utilizing the characteristic that micro-plastic is easily adsorbed on the surface of a glassy carbon electrode, an electric incubation method is adopted to enhance adsorption and reduce response of signal molecules, so that an electrochemical sensing detection method is established. The method has the advantages of rapidness, simplicity, low cost and the like, can be used for effectively detecting the micro-plastics in a wider range and keeping good sensitivity, and has a wide application prospect.

The invention discloses an electromagnetic wave absorbent based on CeFe-PBA and a preparation method thereof, and belongs to the technical field of electromagnetic wave absorbents. The preparation method comprises the following steps: 1) adding polyvinylpyrrolidone into a cerium salt aqueous solution, uniformly mixing, and then sequentially mixing with ethanol and a potassium ferricyanide aqueous solution to prepare CeFe-PBA precursor powder; (2) the precursor powder is subjected to a carbon thermal reduction reaction, and Fe-CeO2 powder is obtained; (3) the Fe-CeO2 powder is dissolved in a Tris dilute solution, then dopamine hydrochloride is added, and Fe-CeO2 (at) PDA powder is prepared; 4, the Fe-CeO2 (at) PDA powder is subjected to a carbon thermal reduction reaction in the N2 atmosphere, and the CeO2 / Fe3C (at) C electromagnetic wave absorbent is prepared. The method is simple in technological operation, controllable in condition, stable in hollow structure, high in conversion rate and good in repeatability, and the obtained absorbent has excellent microwave absorption performance and has industrial application prospects.

This invention relates to the field of flow battery technology, specifically to a neutral flow battery based on Prussian blue targeted activation and its activation threshold control method. The battery uses potassium ferrocyanide / potassium ferricyanide as the dielectric molecule, Prussian blue as the solid energy storage material, and potassium chloride as the neutral electrolyte. The different volumes of the positive and negative electrolytes constitute a capacity-limited system. Experiments determined that a potassium ferrocyanide concentration ≥0.3M is the minimum activation threshold concentration for Prussian blue, and the optimal addition amount of Prussian blue is 10%–20% of the molar amount of potassium ferrocyanide. This control method avoids ineffective accumulation of solid materials. In neutral iron-sulfur full cells, the coulombic efficiency is significantly improved from 55%–85% to 97%–98%, and remains stable within 10 cycles, effectively improving the battery's capacity, reaction reversibility, and long-term stability.

The invention belongs to the technical field of radiochemical synthesis, and particularly relates to a radioisotope carbon-14 labeled thermoplastic polyurethane elastomer hard segment material as well as a preparation method and application thereof. The carbon-14 labeled TPU hard segment material is prepared by taking [14C] potassium cyanide as a radioisotope raw material through cyanation reaction, reduction reaction, deprotection salt forming reaction and amino esterification reaction. According to the preparation method provided by the invention, the labeled site is determined, the radiochemical purity and the chemical purity are relatively high, the labeling yield is medium and slightly higher, and the obtained [14C] BDO-BDI-BDO is consistent with a standard substance through mass spectrum and nuclear magnetic analysis. Meanwhile, the nuclide carbon-14 prepared by the method is firmly marked in BDO-BDI-BDO molecules, is not easy to fall off, and can be further reacted with various high-molecular-weight polyesters or polyethers to obtain corresponding carbon-14 marked thermoplastic polyurethane elastomers, so that the corresponding carbon-14 marked thermoplastic polyurethane elastomers are used for metabolic experiment research of the materials.

The invention discloses a graphene-doped high-entropy Prussian blue analogue material as well as a preparation method and application thereof, and belongs to the technical field of materials. The preparation method comprises the following steps: preparing a high-entropy Prussian blue analogue from nickel nitrate hexahydrate, iron nitrate nonahydrate, cobalt nitrate hexahydrate, chromium nitrate nonahydrate, zinc nitrate hexahydrate, potassium ferricyanide and graphene to form a turbid liquid, collecting a solid material in the turbid liquid by using a centrifugal method, cleaning with ethanol and deionized water, and drying to obtain the high-entropy Prussian blue analogue. And drying and grinding to obtain the high-entropy prussian blue analogue material which can effectively perform electro-catalytic oxygen evolution under an alkaline condition. The graphene-doped high-entropy Prussian blue analogue is prepared by a coprecipitation method, and the method has the characteristics of simplicity in operation, short preparation period, low cost and the like, and is beneficial to popularization and application.

The invention provides a Co-C-N catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method comprises the following steps: sequentially adding cobalt potassium cyanide and zinc salt into a folic acid aqueous solution, standing to obtain yellow transparent bimetallic hydrogel, freeze-drying the yellow transparent bimetallic hydrogel to obtain xerogel, and calcining the xerogel to obtain the Co-C-N catalyst. The folic acid-zinc-cobalt bimetallic hydrogel is obtained by taking folic acid as a supramolecular gel construction framework, so that on one hand, high dispersion of active metal can be realized; on the other hand, after gel freeze drying treatment, the internal structure of the material can be kept, after further calcination, the cobalt nitride-doped two-dimensional layered carbon material Co-C-N is formed, and the cobalt nitride-doped two-dimensional layered carbon material Co-C-N is applied to aerobic oxidation of benzyl alcohol and shows excellent catalytic activity.

The invention discloses a synthesis method of a C-13 labeled mercapto triazole derivative. The synthesis method comprises the following steps: (1) carrying out a reaction on C-13 potassium cyanide and S8 to prepare C-13 potassium thiocyanate; (2) carrying out nucleophilic substitution reaction on C-13 potassium thiocyanate and a benzyl bromide compound to obtain a compound 1; (3) carrying out nucleophilic addition reaction on the compound 1 and formylhydrazine to obtain a compound 2; (4) further cyclizing the compound 2 under an alkaline condition to obtain a compound 3; and (5) carrying out derivative reaction on the compound 3 to obtain a C-13 labeled target compound. According to the synthesis method, multi-step continuous reaction is adopted, operation is easy and convenient, the yield is high, and the utilization rate of the C-13 marker is greatly increased.

The application belongs to the technical field of electrochemical energy storage materials, and particularly relates to a cobalt Prussian blue positive electrode material and a preparation method and application thereof. The application uses sodium citrate dihydrate as a structure directing agent, forms a precursor solution by dissolving sodium citrate dihydrate and cobalt acetate in water together, drops the precursor solution into a potassium cobalt cyanide aqueous solution in a linear manner, stirs the reaction under a fixed rotating speed, and obtains the cobalt Prussian blue positive electrode material after freeze-drying. The application realizes precise construction of the nanostructure of the product by regulating the coordination environment of sodium citrate and cobalt ions and the dropping process. The obtained material is composed of highly dispersed and uniform nanocubes, has high crystallinity and no agglomeration. When the material is used as a positive electrode of a water-based zinc ion battery, it has high specific capacity, excellent rate performance and super-long cycle stability, and has a wide application prospect in the field of large-scale energy storage.

The application belongs to the technical field of electrochromic materials, and provides a red-transparent display electrochromic polymer and a preparation method thereof.The method comprises the following steps: N-(2,5-dibromophenyl)-2-ethylhexylthioamide, potassium hexacyanoferrate and sodium hydroxide are subjected to ring formation reaction to obtain 4,7-dibromo-2-(heptane-3-yl)benzothiazole; EDOT, n-butyllithium and tributyltin chloride are subjected to substitution reaction to obtain EDOT-Sn; 4,7-dibromo-2-(heptane-3-yl)benzothiazole and EDOT-Sn are subjected to Stille coupling reaction and then electrochemical polymerization reaction to obtain the electrochromic polymer.The method obtains a pure donor (D) type organic molecule, and the corresponding electrochromic film is prepared by electrochemical polymerization, reversible switching between red and transparent is realized, and good cycle stability and relatively fast color change response speed are achieved.

The invention discloses a chemical reduction gold working solution without additionally adding KCN. The working solution does not contain potassium cyanide (KCN); the gold-potassium alloy is prepared from the following components in percentage by mass or volume: gold potassium cyanide; pure water; the complexing agent comprises 8% of anhydrous sodium acetate, 6% of sodium ethylene diamine tetracetate, 3% of sodium sulfate, 2% of glycine, 0.08% of formaldehyde, 0.0002% of lead acetate trihydrate and 80.918% of water; the stabilizer comprises 2% of ethylene diamine tetraacetic acid tetrasodium salt, 1% of potassium ferrocyanide and 97% of water; the reducing agent comprises 5% of glycine, 4% of phosphoric acid, 0.8% of formaldehyde and 90.2% of water; and a pH adjusting agent. The invention further discloses a chemical gold plating method. The working solution provided by the invention does not contain potassium cyanide (KCN), so that a non-toxic chemical plating solution is realized; and meanwhile, the consistency and high stripping degree of a gold-plated layer after gold plating can be ensured.

This invention provides a sodium nitroprusside / Prussian blue / manganese composite nanozyme, its preparation method, and its application in antibacterial applications. Belonging to the field of nanomaterials technology, the preparation method involves: first, polyvinylpyrrolidone, potassium ferricyanide, and sodium nitroprusside are mixed in an acidic solution at room temperature to prepare a Prussian blue precursor solution; then, manganese acetate is added dropwise to the Prussian blue precursor solution; after high-pressure reaction, centrifugation, and freeze-drying, sodium nitroprusside / Prussian blue / manganese composite nanozyme powder is obtained. The sodium nitroprusside / Prussian blue / manganese composite nanozyme prepared by this invention possesses a synergistic antibacterial mechanism of "enzyme catalysis + photothermal / ultrasound-based kinetic therapy + NO release." Through dual regulation of NO release via laser or ultrasound, combined with photothermal and acoustic-dynamic effects, it disrupts bacterial structure and metabolism, exhibiting not only highly effective killing of Staphylococcus aureus but also clearing bacterial biofilms, effectively solving the problem of biofilm-mediated drug resistance and providing a new approach in the field of antibacterial research.

The application belongs to the technical field of bulk drug preparation and relates to a synthesis method of Filgotinib. The synthesis method of Filgotinib takes bromobenzaldehyde (compound 1) as a starting material, and boron esterification reaction is carried out under the catalysis of palladium to obtain intermediate 3. Intermediate 3 is subjected to Suzuki coupling reaction with 2-amino-6-bromopyridine (compound 4) to obtain intermediate 5. Intermediate 5 is reacted with thiomorpholine-1,1-dioxide (compound 6) to generate intermediate 7. Intermediate 7 is condensed with cyclopropylcarbonyl chloride (compound 8) and potassium thiocyanate (compound 9) to obtain intermediate 10. Intermediate 10 is subjected to cyclization with hydroxylamine hydrochloride (compound 11) to obtain the final product Filgotinib. The synthesis method solves the problems of the prior art, such as difficulty in obtaining starting materials, harsh reaction conditions and complicated process route, and has the advantages of a short synthesis route, easy availability of materials used in the reaction and simple reaction operation.

This invention discloses a sulfur-doped, supported red mud-based Prussian blue analogue photocatalyst with a wide pH range, its preparation method, and its applications. The method involves acid dissolving red mud raw material to obtain an iron-containing liquid. A sulfur-containing reducing agent and a potassium cobalt cyanide solution are then sequentially added to the iron-containing liquid for reduction and precipitation reactions. The resulting reaction product is separated into solid and liquid phases to obtain a solid product, which is then calcined under a protective atmosphere to obtain the final photocatalyst. This photocatalyst exhibits strong dispersibility, abundant active sites, stable structure, and recyclability, and can efficiently catalyze the degradation of antibiotics. Its preparation method is simple, low-cost, and suitable for industrial production.

A method for electroplating palladium-nickel alloy on the surfaces of copper and copper alloy parts comprises the steps that S1, the surfaces of the copper and copper alloy parts are degreased; s2, pre-corrosion is carried out; the part without oil stains on the surface is placed in a hydrochloric acid solution to be pre-corroded, and after corrosion is completed, the part is rapidly washed clean with running water; s3, emitting light; the pre-corroded part is placed in a mixed solution of chromic anhydride and sulfuric acid to be continuously shaken for bright dipping treatment; s4, scrubbing with magnesium oxide; degreasing cotton is soaked with water, then pasty magnesium oxide is dipped, the surface of the bright part is scrubbed, and the surface of the bright part is washed clean with deionized water; s5, weak corrosion; the part without water drops on the surface is placed in a hydrochloric acid solution to be continuously shaken for weak corrosion treatment; S6, copper plating is conducted; placing the part subjected to weak corrosion in a mixed solution composed of cuprous cyanide, potassium cyanide and sodium hydroxide for copper electroplating to obtain a part with a copper plating layer on the surface; s7, plating a palladium-nickel alloy; and S8, the part with the copper plating layer on the surface is placed in palladium-nickel alloy electroplating liquid to be electroplated with palladium-nickel alloy, and drying is conducted.

The utility model relates to the field of wastewater treatment, and discloses a sodium azide wastewater treatment system which comprises a two-stage denitrification unit, an advanced oxidation pond, a PH (Potential of Hydrogen) regulating pond, a flocculation treatment unit, a hydrolysis acidification pond, an A / O (Anaerobic / Oxic) reaction unit, an activated carbon adsorption pond, a treatment system water outlet unit and a sludge treatment unit for treating sludge which are sequentially communicated, the two-stage denitrification unit and the advanced oxidation pond are used for removing sodium azide and potassium cyanide in the wastewater; the A / O reaction unit is used for reducing the chemical oxidation amount and the total amount of total nitrogen and phosphorus in the wastewater; the flocculation treatment unit and the A / O reaction unit are both communicated with the sludge treatment unit. According to the embodiment of the invention, sodium azide and potassium cyanide can be efficiently decomposed through a combined process of the two-stage denitrification unit and the advanced oxidation pond.