52 results about "Potassium ferrocyanide" patented technology

The invention discloses a high-heat-power thermoelectric cell hydrogel for low-grade heat energy collection and a preparation method thereof, and belongs to the technical field of heat energy recovery. The polyacrylamide hydrogel is selected as a substrate of the thermoelectric cell hydrogel, so that a hydrogel internal structure which is easy to regulate and control can be obtained; excellent hydrogel stretchability is obtained by using a cross-linking agent and an initiator with relatively low concentration; potassium ferricyanide and potassium ferrocyanide are used as redox ions to generate a thermoelectric effect, so that stable P-type thermal power is obtained; by using guanidine hydrochloride, the solvation entropy difference between potassium ferricyanide and potassium ferrocyanide is enlarged, and the thermal power of the hydrogel in the thermoelectric cell is greatly improved; sodium pyrrolidone carboxylate is used, so that the concentration of ions in the hydrogel is further improved, the conductivity of the thermoelectric cell hydrogel is improved, meanwhile, a hydrogen bond network between water molecules is destroyed, and the water-retaining property of the thermoelectric cell hydrogel is improved.

The invention belongs to the technical field of thermoelectric materials and functional polymer materials, and particularly relates to thermoelectric hydrogel based on synergistic enhancement of zwitterions and a polar solvent as well as a method and application of the thermoelectric hydrogel. The thermoelectric hydrogel is obtained through the steps that a precursor solution is subjected to a polymerization reaction to form a gel matrix, then the gel matrix is soaked in a soaking solution, potassium ferricyanide / potassium ferrocyanide redox couple is introduced, and the thermoelectric hydrogel is obtained, and the precursor solution is prepared from acrylamide, N-isopropylacrylamide, dimethyl sulfoxide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide and N, N-dimethylformamide. The photoinitiator is prepared by mixing N, N-dimethylformamide, 1-ethyl-3-methylimidazolium tetrafluoroborate, a zwitterionic monomer [2-(methylacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide, a cross-linking agent N, N '-methylene bisacrylamide, a photoinitiator and deionized water. The thermoelectric hydrogel prepared by the invention has high mechanical strength, high ductility and high Seebeck coefficient, and has better temperature resistance.

The invention discloses a core-shell nano-enzyme composite spray gel dressing and a preparation method and application thereof.The dressing comprises a component A prepared from sodium alginate, N-isopropylacrylamide PNIPAM, core-shell nano-enzyme and curcumin and a component B of a divalent metal salt solution, and the component A and the component B are sprayed at the same time to form the core-shell nano-enzyme composite spray gel dressing. The preparation method of the core-shell nano enzyme comprises the following steps: mixing potassium ferrocyanide, ferric trichloride and polyvinylpyrrolidone to obtain a Prussian blue nano particle precursor solution; carrying out ultrasonic emulsification treatment and replacement on the curcumin core solution and the Prussian blue nanoparticle precursor solution; and freeze-drying to obtain the core-shell nano-enzyme. Through rapid ionic crosslinking of sodium alginate and divalent metal ions and the temperature-sensitive phase change characteristic of the temperature-sensitive polymer poly (N-isopropylacrylamide), the gel dressing is rapidly formed, the damaged skin is effectively covered and protected, the excellent antioxidant, anti-inflammatory and antibacterial capabilities are achieved, and the healing cycle of the radiodermatitis wound can be remarkably shortened.

The invention discloses a heating cigarette preparation method, a heating cigarette and an aerosol tracing analysis method.The heating cigarette preparation method comprises the following steps that potassium ferrocyanide is added into tobacco shreds, and tobacco shred sections are prepared; adding ferric chloride hexahydrate into the filter stick to obtain a tracing filter stick; the tobacco shred section and the tracing filter stick are combined to form a heating cigarette, aerosol generated when the heating cigarette is smoked generates a blue irreversible chromogenic reaction in the tracing filter stick, and therefore the circulation path of the aerosol in the tracing filter stick is displayed. According to the method, through the blue irreversible chromogenic reaction of potassium ferrocyanide and ferric chloride hexahydrate when the potassium ferrocyanide and the ferric chloride hexahydrate meet, the problem that the actual circulation path of cigarette heating aerosol cannot be truly fed back through a traditional cigarette fuming section replacement method is successfully avoided, and the circulation paths of the aerosol in the axial direction and the radial direction of different functional sections of the filter stick are clearly displayed.

The invention belongs to the technical field of adsorption material preparation, and relates to an anion defect type prussian blue analogue and a preparation method and application thereof in cesium adsorption.The preparation method comprises the steps that imidazole and halogenated alkane are subjected to an alkylation reaction and anion exchange to prepare ionic liquid, and after water is added, an ionic liquid-water mixed solvent is obtained; the method comprises the following steps: respectively dissolving transition metal nitrate and potassium ferrocyanide into an ionic liquid-water mixed solvent, dropwise adding a potassium ferrocyanide solution into a transition metal nitrate solution, and stirring to obtain a mixed solution; and carrying out hydrothermal reaction on the mixed solution, cooling to room temperature, washing the material, and drying to obtain the anion defect type prussian blue analogue. The cesium ion adsorption capacity and the cesium ion cycling stability are improved by precisely regulating and controlling anion defects in the Prussian blue analogue, and the cesium ion adsorption material has good ion interference resistance in a complex water environment and shows excellent adsorption selectivity and a wide application range.

The utility model discloses a ureter for detecting hemeroflavin in urine. The ureter comprises a bottle body, a bottle cap and a piston rod, a first preset cavity and a second preset cavity are formed in the bottle body, and detection solutions are respectively preset in the first preset cavity and the second preset cavity; the bottom of the piston rod extends outwards to form a first branch rod and a second branch rod, and the bottom ends of the first branch rod and the second branch rod are provided with a first piston and a second piston respectively. And the first piston and the second piston are respectively arranged in the first preset cavity and the second preset cavity. During detection, urine to be detected is taken and added into the bottle body, a potassium ferrocyanide solution and a hydrochloric acid solution automatically flow out of the preset cavity to form a mixed solution with the urine while the bottle cap is screwed, then the mixed solution precipitates in the precipitation cavity, and whether blue precipitates exist or not is observed so as to judge a detection result. The two preset solutions are mixed in a sealed state, and gas generated after mixing cannot be released into air, so that the medical staff is prevented from being in contact with the gas during detection, and the health of the medical staff is prevented from being damaged.

The present application belongs to the technical field of salt lake resource development and resource utilization, and particularly relates to a method for extracting rubidium based on fiber evaporation adsorber and space separation. The method uses commercial fibers with capillary transport capacity as base material, and in-situ grows copper potassium ferrocyanide and other selective adsorbents in the upper region of the fibers to construct a micro-scale cooperative system integrating capillary transport, interface evaporation, step-by-step crystallization and selective adsorption. The raw material liquid ascends along the fibers and is continuously concentrated, and the competitive ions with higher concentration and lower solubility are preferentially crystallized in the lower part of the fibers. Rubidium is relatively enriched and crystallized in the upper part of the fibers, and is selectively adsorbed by the upper adsorbent. Finally, the rubidium-containing solution is obtained by desorption. The present application can reduce the interference of Na + , K + and other competitive ions, simplify the solid-liquid separation process, and improve the separation selectivity and recovery efficiency of rubidium.

The application discloses an anti-caking salt product and a preparation method thereof. The anti-caking salt product comprises raw salt and an anti-caking agent, the anti-caking agent is food-grade ferric tartrate, and the addition amount of the anti-caking agent is 0.05-0.106 g / kg of the salt. The core of the anti-caking method of the salt lies in that the food-grade ferric tartrate is used as the main anti-caking agent, the addition amount is 0.05-0.106 g / kg of the salt, the salt is dried at 100 DEG C for 4 hours, then the anti-caking agent is added, and the water vapor transmission rate is less than or equal to 0.5 g / m 2 24h of high-barrier material packaging, while 6 g of quicklime or 2 g of calcium chloride desiccant is added in every 200 g of the salt. The application also controls the Mg 2+ content in the salt to be less than or equal to 0.02%, the KCl content to be less than or equal to 10%, and the particle size to be in the range of 0.45-0.6 mm, so that the salt caking is synergistically inhibited from multiple dimensions. The method has extremely significant anti-caking effect (the caking rate is only 8.7% after 15 days of open storage), is safe and economical, and has a simple process, and can effectively replace or reduce the use of potassium ferrocyanide, and is suitable for large-scale industrial production.

The invention relates to the technical field of metal stators, and provides a carbonitriding process of a metal stator for a screw drill, which comprises the following steps: preheating the metal stator, and then carrying out salt bath carbonitriding and salt bath oxidation treatment to obtain the metal stator for the screw drill; during salt bath carbonitriding, a carbonitriding agent comprises the following components in parts by weight: 24 parts of a composite carbon material, 10-15 parts of ammonium chloride, 4-8 parts of urea, 3-6 parts of yttrium oxide, 4-8 parts of potassium ferrocyanide and 10-15 parts of potassium chloride; raw materials of the composite carbon material comprise charcoal, carbon nanotubes and light calcium carbonate. According to the technical scheme, the problem that a metal stator is poor in wear resistance in the prior art is solved.

The invention relates to the technical field of natural rubber processing, and particularly discloses a natural rubber latex preservative and a preparation method thereof. The preservative is prepared from modified nano titanium dioxide, ethylparaben, enzymolysis chitosan, immobilized lysozyme, pentaerythritol ester, sodium hydrosulfite, rosmarinic acid, potassium ferrocyanide, an acrylic acid-chitosan copolymer and the balance of deionized water. The preparation method comprises the steps of enzymolysis chitosan solution preparation and enzyme compounding, organic phase emulsification, nano component ultrasonic dispersion and vacuum defoaming aging, wherein the intermittent ultrasonic temperature control process guarantees the biological activity. The preservative can replace traditional ammonia water to be used for natural latex preservation, and has the advantages of being high in bacteriostasis and oxidation resistance synergism, high in colloid stability, environmentally friendly, safe and free of residues; according to the preparation method, through low-temperature enzyme protection and nano interface engineering innovation, the problems of biological inactivation and particle agglomeration in a traditional process are solved, and efficient and green production is achieved.

The application relates to a preparation method of a poly-pyrrole-prussian blue hybrid photothermal nanolaser, polyvinylpyrrolidone is added into deionized water and stirred until completely dissolved, pyrrole and potassium ferrocyanide are added into the obtained polyvinylpyrrolidone solution, stirring is uniformly conducted, then ferric chloride hexahydrate is added, sufficient stirring and reaction are conducted, a reaction liquid is obtained, after the precipitation is removed through centrifugation, the supernatant is dialyzed and vacuum freeze-dried, and the poly-pyrrole-prussian blue hybrid photothermal nanolaser is obtained.Compared with the prior art, the method has lower requirements on equipment, mild reaction conditions, is green and environment-friendly, is suitable for large-scale production, the prepared photothermal nanolaser has good photothermal ablation effect under the irradiation of near-infrared light, can significantly inhibit the growth of tumor cells, the photothermal nanolaser also has good oxygen production performance, can decompose hydrogen peroxide to generate oxygen, and can further improve the tumor hypoxic microenvironment and enhance the in-situ thermal ablation treatment effect of the tumor, thereby providing a potential technical means for relieving the tumor hypoxic microenvironment and strengthening the in-situ thermal ablation.

The embodiment of the invention provides a preparation method and application of a nickel potassium ferrocyanide template adsorbent. The method comprises the following steps: providing a cesium ferrocyanide solution; performing first mixing on the cesium ferrocyanide solution and a nickel source to obtain a cesium nickel ferrocyanide precursor; and carrying out second mixing on the cesium nickel ferrocyanide precursor and a potassium salt solution to obtain the potassium nickel ferrocyanide template adsorbent. The potassium nickel ferrocyanide template adsorbent prepared by the method disclosed by the invention has relatively good selective adsorption capacity on cesium ions in a cesium-containing solution, and is particularly suitable for adsorbing Cs < + > in a high-salt solution.

The present application relates to the technical field of aircraft maintenance cleaning, and provides an aircraft surface salt removal and prevention cleaning agent and a cleaning method, the cleaning agent comprising the following components in percentage by mass: 0-30% of glycerol, 15-30% of a composite metal protective agent and 2-5% of an anti-salt protective agent, and the balance being distilled water, the composite metal protective agent comprising organic amine, organic acid, ethoxylated phosphate ester and benzotriazole, and the anti-salt protective agent comprising polydimethylsilane emulsion and potassium ferrocyanide; the cleaning agent effectively avoids the corrosion of salt water solution on the aircraft body material, especially metal material and metal plating, during the cleaning process, has good corrosion protection effect, and through the steps of rinsing and air drying or wiping, a protective film can be formed on the surface of the aircraft body, the crystallization of chlorides on the surface of the aircraft body is destroyed, the adhesion is reduced, the re-salting speed is effectively slowed down, and the cleaning agent is especially suitable for the salt removal and maintenance cleaning of military shipboard aircraft and near-shore military aircraft which are exposed to high-salt marine environment for a long time and have long-time low-altitude flight during flight.

The invention relates to a fluorescence and colorimetric dual-mode biosensing method for detecting caffeine and application thereof, the method causes CRISPR / Cas13a to regulate and control Fe-MOFs to fall off from a signal probe based on to-be-detected liquids with different concentration gradients, the fallen Fe-MOFs collapses under the action of sodium pyrophosphate to release 2-aminoterephthalic acid and ferric ions, and the 2-aminoterephthalic acid and ferric ions are subjected to fluorescence and colorimetric dual-mode biosensing method is used for detecting caffeine. 2-aminoterephthalic acid is converted into a fluorescence signal, meanwhile, Prussian blue generated by reaction of ferric ions and potassium ferrocyanide is converted into a colorimetric signal, and a fluorescence and colorimetric dual-mode biosensing method is constructed; according to the sensor, interference factors can be effectively eliminated by outputting two detection signals and performing cross validation; the advantages of high sensitivity and wide linear range of a fluorescence method and the advantages of simple operation and visual result of a colorimetric method are combined, so that a target object can be accurately recognized, the lower detection limit can be reduced, and the accuracy of a quantitative result can be ensured; according to the sensing method, visual observation can be achieved, precise instruments are not needed, and good application value is achieved.

The present invention relates to a process for producing a composite ferrocyanide adsorbent of a transition metal in the silica gel matrix comprising the following steps: (i) the preparation of a first aqueous composition comprising at least a mixture of a sodium or potassium ferrocyanide with a sodium silicate solution so as to obtain the dissolution of salts; (ii) the preparation of a second composition comprising a mixture of at least: a transition metal salt selected from one or more of the following compounds: nickel, copper, zinc, cobalt, and an inorganic acid; (iii) the mixing of the first aqueous composition with the second composition until a suspension is obtained; (iv) the addition of an inorganic acid or base so that the suspension obtained at the end of step (iii) has a pH ranging from 4 to 9;(v) the separation of the suspension obtained at the end of step (iv) so as to obtain a precipitate within a liquid phase; (vi) the separation of said precipitate, the rinsing and drying of the precipitate, so as to obtain a solid precipitate, characterized in that the first aqueous composition comprises a soluble salt of rubidium or cesium, and the second composition further comprises a soluble salt of metal selected from one or more of the following compounds: aluminium, titanium, zirconium.;

According to the environment-friendly rust transforming agent and the preparation method thereof, a tea polyphenol-tannic acid-ascorbic acid-sodium gluconate food-grade quaternary synergistic transformation system is constructed, chelate precipitation is inhibited through specific coordination of sodium gluconate and Fe < 3 + >, and the problem that an existing plant extract transforming agent is prone to losing efficacy during storage is solved; the reaction endpoint is quantitatively judged through the pH response of the purple cabbage anthocyanin and the potassium ferrocyanide-Fe < 3 + > chromogenic reaction, and the visualization is good; the device has the advantages of being safe, non-toxic, low in cost, high in stability, high in education adaptability and the like, can be widely applied to household metal appliance maintenance, small metal handicraft protection and teenager chemical experiment teaching, and has remarkable application value.

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.

This invention relates to the field of cesium ion adsorption materials, specifically to an acid-controlled copper-based Prussian blue analogue, its preparation method, and its application. The invention provides a method for preparing an acid-controlled copper-based Prussian blue analogue, comprising: adding potassium ferrocyanide solution to a mixture of polyvinylpyrrolidone and a copper salt solution, followed by stirring and aging to obtain particulate copper-based Prussian blue analogue; adding the particulate copper-based Prussian blue analogue to a mixture of acid and N,N-dimethylformamide, followed by heating to obtain an acid-controlled copper-based Prussian blue analogue. This invention utilizes acid control to induce new structures and more adsorption sites in the copper-based Prussian blue analogue, thereby achieving selective and efficient adsorption of cesium ions in water, significantly reducing the interference of sodium ions on cesium ion adsorption, and making it more stable in solution.

The invention provides a selective oxidation catalyst as well as a preparation method and application thereof. The main components of the catalyst are iron and molybdenum, potassium ferricyanide is added in the preparation process for modification, the structure of the catalyst is improved, the binding force between the components is enhanced, and therefore the stability and selectivity of the catalyst are improved. The catalyst prepared by the method can improve the strength of the catalyst after reaction, improve the binding force between active components and prolong the service life of the catalyst, and can be applied to preparation of aldehyde by alcohol oxidation.

The invention relates to the technical field of aircraft wing surface protection materials, in particular to a high-temperature-resistant material for aircraft wing surface coating and a preparation method of the high-temperature-resistant material. The material is prepared from modified phthalonitrile, cyanated POSS (Polyhedral Oligomeric Silsesquioxane), N, N-dimethylformamide, a high-temperature-resistant dispersing agent, a silane coupling agent, an anti-settling agent and a curing catalyst. Wherein the modified phthalonitrile is prepared by reacting rigid-flexible synergistic molecules containing siloxane and benzene ring chain segments with 4-nitrophthalonitrile; the cyanation POSS is obtained through the reaction of octa (chloropropyl) POSS and potassium ferrocyanide. During preparation, all the components are dispersed in a solvent and ground to form slurry. In the curing process of the material, a polycyclic cross-linked network containing a triazine ring, a phthalocyanine ring and an oxazoline ring derivative is formed through cyano trimerization, by means of reinforcement of a POSS cage structure, a coating is endowed with excellent high temperature resistance, low thermal expansion coefficient, high adhesive force and thermal shock resistance, and the material is suitable for high-temperature protective coating of various aircraft airfoils.

The application discloses a kind of liquid thermal battery electrolyte and preparation method and thermal liquid battery comprising the electrolyte, it is related to battery technical field, especially it is related to a kind of liquid thermal battery electrolyte, including potassium ferricyanide, potassium ferrocyanide, guanidine hydrochloride and organic matter;The molar concentration of potassium ferricyanide in the electrolyte is 0.65-1.1mol / L;The molar concentration of potassium ferrocyanide in the electrolyte is 0.70-0.95mol / L;The molar concentration of guanidine hydrochloride in the electrolyte is 6-8mol / L;The molar concentration of organic matter in the electrolyte is 0.1-6.5mol / L.The way that the electrolyte increases organic matter increases the entropy change of whole system, can generate higher open-circuit voltage under the same temperature difference, reaches higher thermoelectric conversion efficiency.

The invention provides a cyaniding gold leaching auxiliary and a gold leaching method, and belongs to the technical field of cyaniding gold leaching, and the cyaniding gold leaching auxiliary is composed of the following components of, by mass, 40-45% of ferric ammonium citrate, 40-50% of potassium ferrocyanide and 5-20% of sodium bicarbonate. According to the cyaniding gold leaching auxiliary, efficient gold leaching is achieved through the synergistic effect of the sodium bicarbonate, the ammonium ferric citrate and the potassium ferrocyanide, wherein the sodium bicarbonate stabilizes the pH and improves mass transfer; ferric ammonium citrate is complexed with impurity ions, and oxidation circulation is accelerated; potassium ferrocyanide doubly inhibits pyrite to reduce cyanide consumption; the three components form a closed-loop synergistic system which has the advantages of high efficiency, economy and environmental protection. Through the synergistic effect of the cyaniding gold leaching auxiliary agent and sodium cyanide, gold can be more effectively extracted from ore, and the leaching efficiency is improved.

The application discloses a Prussian blue composite adsorbent for selectively extracting cesium and a preparation method and application thereof. The preparation steps of the composite adsorbent comprise the following steps: uniformly mixing polyethylene glycol, a ferric salt and a solvent, stirring to form a complex of the polyethylene glycol and the ferric ion, then adding a high polymer material into the complex, uniformly mixing, vacuum deaerating, and then preparing a high polymer microsphere precursor with a hollow structure through spray drying; mixing the high polymer microsphere precursor with a potassium ferrocyanide solution to react, and then filtering, washing with water and drying to obtain the Prussian blue composite adsorbent for selectively extracting cesium. The composite adsorbent has the characteristics of high Prussian blue loading capacity, high adsorption capacity and low loss, and can be applied to extraction of cesium elements in cesium-containing solutions such as salt lake raw brine, old brine, lithium precipitation mother liquor, seawater and underground water resources.

The present invention provides a method for preparing 4-(hydroxymethylphosphinyl)-2-oxobutanoic acid, comprising the following steps: a) mixing acryloyl chloride, a first solvent, a polymerization inhibitor, a catalyst and potassium ferrocyanide, performing a substitution reaction, and performing distillation under reduced pressure to obtain an acryloyl cyanide intermediate; b) mixing the acryloyl cyanide intermediate obtained in step a) with hydrochloric acid and a polymerization inhibitor, performing a hydrolysis reaction, and then performing purification treatment to obtain crude 2-carbonyl-3-butenoic acid; c) mixing the crude 2-carbonyl-3-butenoic acid obtained in step b) with a second solvent and methyldichlorophosphine, and performing an addition reaction to obtain a solution containing diacyl chloride; d) mixing the solution containing diacyl chloride obtained in step c) with water, performing a hydrolysis reaction, and performing purification to obtain 4-(hydroxymethylphosphinyl)-2-oxobutanoic acid. The preparation method provided by the present invention has simple process, mild conditions, good controllability, low cost and high yield.

The invention relates to the technical field of preparation of inorganic-organic composite functional materials, and relates to a preparation method of an MFCs-coated E-ZrP composite adsorbent and a separation membrane thereof, and the method comprises the following steps: firstly, carrying out intercalation stripping on alpha-zirconium phosphate by using trihydroxymethyl aminomethane through a colloid assembly intercalation method to prepare a water-based E-ZrP dispersion liquid; then transition metal chloride and potassium ferrocyanide are sequentially introduced into the water-based E-ZrP dispersion liquid, metal ferrocyanide is generated through an in-situ reaction, and the MFCs-coated E-ZrP composite adsorbent is obtained; and blending the composite adsorbent with a high-molecular polymer, and preparing the MFCs-coated E-ZrP composite separation membrane by adopting a non-solvent induced phase separation technology. The composite adsorbent and the separation membrane prepared by the invention have high selective adsorption capacity and excellent structural stability on rubidium and cesium ions, and can be widely applied to the fields of separation and extraction of rubidium and cesium in salt lake brine, underground brine and geothermal water, removal of cesium ions in radioactive wastewater and the like.

The invention provides a composition for polishing a copper-interconnected ruthenium-based barrier layer, which comprises the following components in percentage by weight: 0.1-5wt% of silicon dioxide abrasive, 0.1-5wt% of organic solvent, 0.1-5wt% of organic solvent, 0.1-5wt% of organic solvent and the balance of water, 0.01 to 2 wt% of hydrogen peroxide; 0.01 to 3 wt% of an alcohol amine compound; 0.1 to 0.3 wt% of potassium ferrocyanide; 0.01 wt% to 0.3 wt% of 5-methylthio-1H-tetrazole; ammonia water and the balance of deionized water; the pH value of the composition is 9.0. According to the method, 5-methylthio-1H-tetrazole is introduced into a polishing system to serve as a copper inhibitor, potassium ferrocyanide and ethidene diamine are introduced to serve as ruthenium removal promoting components, the removal rate of ruthenium can be increased while excessive removal of copper and galvanic corrosion can be inhibited, copper protection and ruthenium removal are both considered, planarization treatment of wafers is achieved, and the quality of the wafers is improved. And the morphology of the dish-shaped pit and the corrosion pit is improved.

The application discloses a kind of MIP / WS2-AC@Cu-MOF-199 modified glassy carbon electrode and its preparation method and electrochemical sensing detection perfluorooctane method, with MIP / WS2-AC@Cu-MOF-199 modified glassy carbon electrode as working electrode, Ag / AgCl electrode as reference electrode, platinum as auxiliary electrode, potassium ferricyanide / potassium ferrocyanide as charged probe molecule, and water PFOA is detected quickly using differential pulse voltammetry.The application will tungsten sulfide-activated carbon (WS2-AC) and Cu-MOF (199) are simply modified by ball milling, to strengthen the conductivity of original Cu-MOF material, to establish a simple and low-cost electrochemical sensing detection method.This method has simple detection, raw material source is extensive, and the method can effectively detect PFOA in a wide range and maintain good sensitivity.The application provides a kind of water perfluorooctane sensing detection method based on electrochemistry using MOF material, and has good application prospect.

This invention discloses a method for extracting polysaccharides from the stipe of *Morchella esculenta* and its application, relating to the field of polysaccharide extraction technology. The *Morchella esculenta* stipe polysaccharide is D-MSPS-1, mainly composed of mannose, glucose, and galactose in a molar ratio of 25.88:65.17:8.95, with a weight-average molecular weight of 64202. The method includes the following steps: Step 1: Drying, pulverizing, and sieving the *Morchella esculenta* stipe; Step 2: Ultrasonic extraction using a eutectic solvent, collecting the supernatant, adding anhydrous ethanol, precipitating overnight, centrifuging to collect the precipitate, obtaining crude *Morchella esculenta* stipe polysaccharide; Step 3: Removing proteins from the crude polysaccharide in Step 2 using a potassium ferrocyanide-zinc acetate method, and adsorbing pigments using macroporous resin to obtain crude polysaccharide D-MSP; Step 4: Separating and purifying D-MSP using a chromatography column to obtain homogeneous D-MSPS-1. This invention provides a technical reference for the green and efficient extraction of fungal stem polysaccharides, and provides preliminary experimental basis for their potential application in the development of functional foods and tumor adjuvant therapy products.

The invention belongs to the field of adsorbents, and particularly relates to a rubidium and cesium ion selective adsorbent based on a bio-based porous carbon material and a synthesis method thereof.Biomass raw materials are smashed to be prepared into suspension liquid, the suspension liquid reacts with an activating agent, and a precursor is obtained; performing anaerobic calcination on the precursor to obtain a bio-based porous carbon material; heating the bio-based porous carbon material to 330-335 DEG C in an inert atmosphere, taking out the bio-based porous carbon material, and immediately reacting the bio-based porous carbon material with a cold ethanol water solution to obtain a modified bio-based porous carbon material; and dispersing the modified bio-based porous carbon material in a mixed aqueous solution containing transition metal salt and potassium ferrocyanide for reaction to obtain the rubidium and cesium ion selective adsorbent. The adsorption capacity retention rate of the adsorbent is not lower than 85% after five times of adsorption-desorption cycles in an ultrasonic-assisted desorption environment; after 8 times of adsorption-desorption cycles, the adsorption capacity retention rate is not less than 75%; and the cycle service life is long.

The application belongs to the field of self-powered materials, and discloses an ionic thermoelectric gel, a preparation method thereof and a flexible self-powered thermoelectric device, comprising the following steps: adding polyvinyl alcohol, sodium alginate and calcium chloride into a mixed system of deionized water and glycerol to obtain solution A; adding sodium citrate into the solution A to obtain solution B; adding potassium ferricyanide and potassium ferrocyanide into the solution B to obtain solution C; and freezing and thawing the solution C to obtain a shaped gel; and soaking the shaped gel in a sodium citrate solution to obtain the ionic thermoelectric gel. Through the multi-dimensional innovative design of the double-network matrix construction, the sodium citrate multi-regulation and the double thermoelectric mechanism synergy, the core problems of the poor mechanical adaptability, the insufficient power transmission stability and the weak long-term service ability of the existing ionic thermoelectric gel are improved, the dynamic deformation demand of the human body movement is adapted, the continuous discharge under the small temperature difference of the human body is realized, and the long-life synergistic optimization of the mechanical properties and the power transmission performance is realized.