107 results about "Complex ions" patented technology

The invention discloses a rapid enrichment-atomic absorption spectrum analysis method for low-content gold in gold ore, and relates to the technical field of gold ore analysis and detection.The rapid enrichment-atomic absorption spectrum analysis method comprises the following steps that an ore sample and a solid composite additive are mixed and roasted at the low temperature of 500-650 DEG C, and the additive contains alkali metal carbonate and zinc oxide; sulfur fixation, catalytic oxidation of organic carbon and stabilization of volatile elements can be synchronously realized; the method comprises the following steps: roasting gold-loaded activated carbon, dissolving the gold-loaded activated carbon in aqua regia to obtain a to-be-enriched solution, enabling the solution to pass through an adsorption column filled with modified activated carbon, pretreating the activated carbon with a 1-10% ammonium citrate solution to improve the selective adsorption capacity of the activated carbon on gold chloride complex ions, ashing the gold-loaded activated carbon, dissolving residues, fixing the volume, and measuring by using an atomic absorption spectrometry. According to the rapid enrichment-atomic absorption spectrum analysis method for the low-content gold in the gold ore, through cooperation of low-temperature roasting of the composite additive and selective adsorption of the modified activated carbon, the decomposition efficiency and enrichment selectivity of the ore difficult to treat are improved.

The application discloses a method for selectively extracting fluorine from a fluorine-containing aqueous solution based on complex extraction, which comprises the following steps: (1) adding a fluorine complex cation to the fluorine-containing aqueous solution to obtain a solution containing metal-fluorine complex ions; and (2) mixing a saponified organic phase with the solution containing the metal-fluorine complex ions and separating phases to obtain a fluorine-loaded organic phase and a raffinate after fluorine removal. The method can achieve the purpose of deep fluorine removal.

The invention provides a method for recovering rhodium in organic residual liquid containing triphenylphosphine / phosphine oxide, and relates to the technical field of precious metal recovery, and the method comprises the following steps: S1, carrying out reduced pressure rectification on the organic residual liquid containing triphenylphosphine / phosphine oxide to remove volatile components until the indexes of the residual liquid meet the feeding requirements of a subsequent process, and collecting light components for independent storage; s2, adding an acidic medium into the organic phase after light component removal, stirring and heating, introducing an oxidizing agent to carry out oxidation-complexation reaction, maintaining reaction conditions until the reaction is complete, standing for phase splitting, and collecting a water phase containing rhodium complex ions; according to the method, a core process combining oxidation-chlorination transfer and anion exchange adsorption is adopted, and key parameters of each process are accurately controlled, so that the rhodium recovery rate is stabilized at 95% or above, the rhodium content in the residual liquid can be reduced to 5 ppm or below, the industrial emission standard is completely met, and compared with the prior art, the resource recovery efficiency is greatly improved, and the cost is reduced. And waste of precious metal resources is effectively reduced.

The invention particularly discloses a preparation method and application of a composite ion exchange membrane. The composite ion exchange membrane is prepared from the following components in parts by weight: 95 to 110 parts of perfluorinated sulfonic acid resin, 5 to 8 parts of functionalized multi-walled carbon nanotubes, 10 to 15 parts of phosphotungstic acid, 1 to 1.8 parts of cerium-tannin complex, 12 to 20 parts of polyphenylene sulfide enhanced net, 30 to 40 parts of sulfonated polyether ether ketone solution, 3 to 5 parts of MXene-silicotungstic acid compound and 1 to 3 parts of polyethyleneimine cross-linking agent. The preparation method comprises the following steps: preparing the functionalized multi-walled carbon nanotube and the cerium-tannin complex; blending the perfluorinated sulfonic acid resin and the functional filler to prepare a membrane casting solution, and coating to form a membrane; a PPS reinforced net and an SPEEK solution are subjected to composite reinforcement, the PPS reinforced net and the SPEEK solution are subjected to PEI crosslinking and then superposed with the membrane, an MXene-silicotungstic acid compound is sprayed on the surface, and the composite ion exchange membrane is obtained through hot pressing and acid activation, has high proton conductivity and excellent mechanical strength and chemical stability and can be applied to a proton exchange membrane electrolytic cell and an all-vanadium redox flow battery.

The present application belongs to the technical field of pharmaceutical preparation, and relates to an electrolytic silver ion solution capable of completely inactivating HIV and a preparation method thereof. The electrolytic silver ion solution uses ultrapure water as a solvent, and contains divalent silver ions, a complexing agent and a complexing agent in the electrolytic silver ion solution. The complexing agent is hexamethylenetetramine capable of forming a stable complex with silver ions and capable of quantitatively analyzing the concentration of silver ions. The hexamethylenetetramine is of an analytical purity grade. The complexing agent is ethylenediamine capable of forming a more stable silver-ammonia complex ion, i.e., diammine silver, and capable of doubling the concentration of the generated silver-ammonia complex ion. The concentration of the divalent silver ions is 200-300 mg.kg ‑1 -1; the highest concentration of the complexing agent is 0.9 g.kg ‑1 -1; and the highest concentration of the complexing agent is 0.55 g.kg ‑1 The complexing agent and the complexing agent of the present application have a small dosage, a high relative ratio of silver ions and a stronger activity, and the inactivation rate of HIV is as high as 99.993%.

The objective of the present invention is to provide a chemical treatment liquid capable of forming a coating having improved corrosion resistance. The present invention relates to a chemical treatment liquid containing a water-soluble titanium complex ion, a water-soluble vanadium-containing ion, and a fluorine ion, wherein the concentration of the fluorine ion is 1.2 g / L or more.

The present application relates to the technical field of catalytic materials, and discloses a halloysite nanotube loaded palladium-platinum bimetallic alloy catalyst and a preparation method thereof, the catalyst comprising heat pretreated halloysite and uniformly dispersed palladium-platinum bimetallic alloy particles, and the mass ratio of palladium, platinum and heat pretreated halloysite being 0.012-0.022:0.012-0.022:1. The preparation method comprises mixing the heat pretreated halloysite with palladium chloride and chloroplatinic acid hexahydrate, adding concentrated ammonia water to adjust the pH to 9-11 to form an ammonia complex; obtaining a precursor through a hydrothermal reaction, and adding sodium borohydride for liquid phase reduction. The bimetallic alloy phase produces geometric and electronic synergistic effects, thereby reducing the reaction activation energy; the ammonia complex ion is chemically bonded with the hydroxyl group of the carrier to prevent the loss of active components in the hydrothermal environment. The catalyst is combined with glycerol to produce hydrogen in situ, thereby avoiding the safety hazards and equipment investment of external high-pressure hydrogenation, and realizing the high-yield conversion of green diesel under extremely low noble metal loading.

This invention provides a scale inhibitor and its preparation method. The scale inhibitor is used for phosphogypsum leachate in a reverse osmosis membrane system. The scale inhibitor comprises the following raw materials in parts by weight: 10%-20% aluminum compound, 5%-10% organophosphonic acid, 2%-5% anionic surfactant, 4%-10% solvent, and the remainder is purified water. This addresses the problem of scaling in phosphogypsum leachate in reverse osmosis membrane systems by existing commercially available scale inhibitors, which suffer from poor targeting and scale inhibition effects. This invention introduces an aluminum compound, in which Al... 3+ It will react with silicon in a competitive manner with fluorine, from SiF6 2‑ Complex ions replace silicon to form acid-soluble AlF₂. x 3‑x Complexing ions cause SiF6 in the phosphogypsum leachate to form complex ions. 2‑ Reduce or inhibit SiF6 2‑ This reduces or inhibits the formation of potassium / sodium fluorosilicate scale.

The invention belongs to the field of material surface treatment engineering, and provides a micro-arc oxidation method of titanium-based sewage disposal equipment, which comprises the following steps: carrying out micro-arc oxidation treatment by taking copper pyrophosphate complex ions as a copper source, a titanium-based workpiece as an anode and an inert electrode as a cathode, and carrying out micro-arc oxidation treatment by controlling the pH value of electrolyte to be 8.5-8.8, the copper pyrophosphate complex ions stably exist in the electrolyte in the form of ions, and move towards the anode under an external electric field, so that a micro-arc oxidation film layer with high copper doping amount is formed on the surface of the copper pyrophosphate complex ions, and the micro-arc oxidation film layer has good corrosion resistance and antifouling performance. According to the method, the anti-fouling performance of the micro-arc oxidation film layer can be improved, and wide application of the titanium-based component in a blow-off pipeline system is promoted.

The application discloses a temperature response positive charge type nano-fertilizer delivery system, and belongs to the technical field of fertilizers. The delivery system is a regular circular core-shell structure with an average particle size of 80-120 nm, and is formed by encapsulating complex ions formed by humic acid and trivalent iron ions, with a positive polymer (PDMAEMA-b-PCL) as a carrier. The average Zeta potential range of the delivery system is 25-32 mV. The delivery system utilizes a temperature response unit to intelligently regulate and control surface charges. At normal temperature, the high positive charge of the delivery system can be strongly adsorbed on the surface of the negatively charged leaf, so that the deposition uniformity and the anti-scouring property are improved. After deposition, the environmental temperature is increased to trigger the in-situ reduction of the charge, so that the absorption barrier is broken, and the uptake capacity of the leaf for nutrients is optimized. Compared with other nano-fertilizers and commercially available fertilizers, the application has more excellent effects on promoting seed germination and crop growth and development, and crops show good concentration dependence, which proves the efficiency and application safety of the application.

The application discloses an antibacterial temperature-regulating fabric and a preparation method thereof. The method comprises the following steps: reacting a silver ion solution with a reducing agent to obtain silver complex ions, and then reacting the silver complex ions with graphene oxide to obtain a nanocomposite AGO; preparing a silica and titanium dioxide suspension, mixing the two uniformly, and then preparing SiO2 / TiO2 by a hydrothermal method; preparing AGO electrospinning liquid by mixing the nanocomposite AGO and polyacrylonitrile, and then spinning a fiber layer on the AGO electrospinning liquid by an electrospinning method to obtain an Ag / GO@PAN layer; preparing SiO2 / TiO2 electrospinning liquid by mixing the SiO2 / TiO2 and polyacrylonitrile, and then spinning a second fiber layer SiO2 / TiO2@PAN on the surface of the Ag / GO@PAN layer by the electrospinning method to obtain an Ag / GO@SiO2 / TiO2@PAN fabric. The fabric prepared by the application realizes two-way temperature regulation of intelligent fabric radiation refrigeration daytime temperature drop and passive radiation heat preservation, and has good antibacterial property.

This invention relates to the field of ceramic materials and provides a method for preparing silicon nitride powder, solving the problem of high residual chlorine / oxygen impurities due to the difficulty in removing byproducts during the preparation of silicon nitride in existing technologies. The method includes the following steps: S1, constructing an electrochemical cell: the anode material is a high-purity single-crystal silicon wafer; the cathode material is a graphite plate; the electrolyte is a mixed solvent of liquid ammonia and ethylenediamine with added LiCl electrolyte; S2, electrochemical ammonolysis reaction: under the action of an electric field, the silicon anode is oxidized to generate high-valence silicon-ammonia complex ions; the NH2 released from the liquid ammonia... ‑ The precursor migrates and combines towards the anode to generate a silane precursor containing Si-NH2 bonds; S3, the precursor is purified by washing with liquid ammonia, replacing with organic solvent and drying at low temperature; S4, the precursor is subjected to low-temperature pre-decomposition and high-temperature crystallization treatment under nitrogen protection to obtain high-purity α-Si3N4.

The application discloses a preparation and application of a high-selectivity composite ion conductive membrane, and a preparation method thereof is as follows: dissolving PVDF powder in an organic solvent, adding a pore-forming agent, immersing the obtained membrane in water after casting the membrane, taking out the membrane and drying the membrane to obtain a porous substrate; mixing an HPA solution and a MXene dispersion liquid, adjusting the pH to be acidic, and obtaining a MXene-HPA composite after heating and stirring; dispersing sulfonated polyether ether ketone and the MXene-HPA composite in an organic solvent to obtain a third mixed liquid, coating the third mixed liquid on the surface of the porous substrate, and drying to obtain an intermediate; and immersing the intermediate in a PEI cross-linking liquid to obtain the composite ion conductive membrane. The composite ion conductive membrane prepared on the basis of SPEEK has a low vanadium permeation rate, and meanwhile, the problem of low proton conduction capacity of the SPEEK membrane is overcome. The all-vanadium redox flow battery assembled on the basis of the composite ion conductive membrane has excellent cycle capacity retention.

The present application relates to an organic selenium nutrient solution for crops and a preparation method thereof. The nutrient solution comprises, by mass percentage, selenomethionine 0.1-0.5%, complex amino acids 2.0-5.0%, potassium humate 1.0-3.0%, plant extracts 0.5-1.0%, EDTA chelated calcium, magnesium and zinc 0.05-0.5%, potassium sorbate 0.05-0.2%, and purified water as the remainder. Preferably, the selenomethionine is L-type selenomethionine with a three-layer coating, the inner layer of which is formed by cross-linking chitosan and citric acid, the middle layer is hydroxypropyl methyl cellulose, and the outer layer is a sodium alginate-gelatin matrix cross-linked by Ca 2+ / Zn 2+ complex ions. The preparation method comprises adding and chelating each component under specific pH conditions, and stabilizing to form a stable multi-component synergistic system. The nutrient solution has the advantages of high bioavailability, good controlled release performance, high plant absorption efficiency, and strong component stability.

The invention belongs to the field of electrochemical energy devices, and discloses a composite ion conduction membrane for improving ion selective conduction performance through interface design and a preparation method thereof.The preparation method comprises the steps that sulfonated polyether ether ketone and an organic solvent are mixed and then filtered, and a membrane casting solution A is obtained; the membrane casting solution A is subjected to membrane forming, and the sulfonated polyether ether ketone membrane is obtained; mixing sulfonated polybenzimidazole, polyethylene glycol diglycidyl ether and an organic solvent, and filtering to obtain a membrane casting solution B; the molar ratio of sulfonated polybenzimidazole to polyethylene glycol diglycidyl ether is (1000: 1)-(10: 1); and dropwise adding the membrane casting solution B to a sulfonated polyether-ether-ketone membrane on which the membrane is formed, and further forming the membrane to obtain the sulfonated polyether-ether-ketone / sulfonated polybenzimidazole double-layer composite ion conduction membrane. Through a layer-by-layer assembly method, a molecular-level uniform composite membrane interface structure is formed by utilizing an interface mutual dissolution effect induced by a solvent, so that the compatibility of an interface is improved, and collaborative optimization of proton conduction and vanadium ion barrier is realized.

The application provides a composite hydrogel lithium ion sieve and a preparation method thereof, and belongs to the technical field of lithium ion sieve adsorption.The active component of the ion sieve is H2TiO3, the binder is polyacrylamide PAM, and the ion sieve is uniformly dispersed in the polyacrylamide.The composite lithium ion sieve is used for selective adsorption extraction of lithium ions in low-concentration geothermal water, oil and gas field water, salt lake brine and seawater.The H2TiO3@PAM composite lithium ion sieve provided by the application has the advantages of high adsorption capacity, good ion sieve structure stability, high selectivity for salt lake brine with a high magnesium-lithium ratio, easy separation of the composite ion sieve from a liquid solution, good regeneration repeatability, and good industrial application prospect.

This invention discloses a method for the membrane electrolytic refining of crude antimony based on a tartaric acid system, relating to the field of metal purification technology. The method includes: preparing an antimony tartrate solution, controlling the antimony ion concentration to 30–55 g / L and the tartrate ion concentration to 230–270 g / L, so that the antimony ions exist as negatively charged complex ions. After settling and filtration, crude antimony is used as the anode and a stainless steel plate as the cathode, at a current density of 200–250 A / m. 2 Pre-electrolysis is performed at 25–55°C to achieve deep purification of the solution; then, anion exchange membranes are used to separate the anode and cathode chambers, allowing only negatively charged ions to pass through; finally, the clean solution obtained from pre-electrolysis is used as the initial electrolyte, and the solution is purified at a current density of 50–200 A / m³. 2 Electrolytic refining at 25~55℃. This invention enables electrolytic refining over a wide current density range (50~250 A / m). 2 It operates stably for a long time within a temperature range (15~55 ℃), and obtains high-quality refined antimony products with dense crystals, smooth surfaces and excellent morphology on stainless steel cathode plates, realizing efficient and low-pollution electrolytic refining of crude antimony under the green tartaric acid system.

To provide a method for producing a fluorine-containing compound, hardly causing an anode effect when producing the fluorine-containing compound such as fluorine gas by electrolyzing an electrolytic solution.SOLUTION: The method for producing a fluorine-containing compound includes an electrolysis step of electrolyzing an electrolytic solution using an anode and a cathode to produce a fluorine-containing compound. The electrolytic solution contains hydrogen fluoride, a metal fluoride, and a complex ion represented by the chemical formula [MXn] m -. In the chemical formula [MXn] m -, M represents an ion of a d-block element having 4 or more and 8 or less electrons in the outermost d-orbital, X represents a halogen atom, m representing the valence of the complex ion is an integer of 1 or more and 5 or less, and n representing the number of X's is an integer of 2 or more and 10 or less.SELECTED DRAWING: None

A testing method, the steps comprising: providing a liquid chromatograph and an inductively coupled plasma mass spectrometer in series; preparing a solution of a test substance containing a concentration of the substance in the PPm to PPb range, continuously perfusing the test solution into a liquid chromatography column; and obtaining a penetration curve of the substance for the penetration ratio and time, and the penetration ratio value for the penetration curve of the substance gradually increases with time and tends to be stable; the present invention continuously perfuses the sample into the column through the combination of LC-ICP-MS, and uses ICP-MS to observe the standard of the known metallic state between the same or different columns, so that the metal in the sample can be determined as a metallic ion, metallic complex ion, metallic chelate molecule, or metallic particle.

The invention relates to a catalyst for preparing 1, 3-propylene glycol through hydrogenation of methyl 3-hydroxypropionate and a preparation method of the catalyst, and mainly solves the problems that the activity of the catalyst is reduced due to agglomeration of an active component Cu, and the selectivity of the 1, 3-propylene glycol is low. The preparation method comprises the following steps: (1) forming an ammonia complex ion solution from a main active component Cu and one or more of assistants Zn, Ni, Co, Cr, Pt and Ag, and forming composite nanoparticles under the action of a reducing agent; (2) adding a silicon source and one or more of carrier assistants Zr, La, Ce, Ga, Ti and Al into the solution containing the composite nanoparticles, and forming a silicon dioxide supported composite catalyst under a hydrothermal condition; and (3) carrying out suction filtration, washing, drying and roasting to obtain the catalyst. According to the present invention, the active auxiliary agent and the main active component Cu effectively form the composite particles, and the composite particles and SiO2 are organically combined under the hydrothermal condition so as to improve the dispersity of Cu, such that the activity and the stability of the catalyst are improved;

The invention discloses a green deplating solution for a photovoltaic welding strip and a valuable metal separation and recovery method. The deplating solution is an aqueous solution, and solutes comprise a main oxidizing agent, a green acidic auxiliary agent, a complexing cosolvent and a copper special corrosion inhibitor; the main oxidant is selected from sodium persulfate, ammonium persulfate and ferric nitrate; the green acidic auxiliary agent is selected from sulfamic acid, methanesulfonic acid, tartaric acid and citric acid; the complexing cosolvent is selected from sodium chloride, ammonium chloride and thiourea; and the corrosion inhibitor is selected from benzotriazole, methyl benzotriazole and 2-mercapto benzimidazole. The waste welding strip is subjected to an immersion reaction at the temperature of 20-60 DEG C, tin, lead and / or silver enter the solution in the form of complex ions, and a copper substrate is kept bright and clean; and after solid-liquid separation, gradient recovery of silver extraction by replacement, lead separation by temperature difference crystallization and tin precipitation by hydrolysis can be adopted, or total replacement recovery by adding excessive zinc-based displacer can be adopted. The separation and recovery method is rapid in deplating, free of white films, low in copper loss and suitable for silver-containing and silver-free solder strips.

The invention belongs to the technical field of alloy surface modification, and particularly relates to an electrolyte and application thereof, a copper-doped micro-arc oxidation film and a preparation method of the copper-doped micro-arc oxidation film. The invention provides an electrolyte. The electrolyte comprises a composite copper source, a film-forming agent, a surfactant, a pH value regulator and water, the composite copper source comprises soluble copper salt and sodium copper chlorophyllin. The chlorophyll copper complex ions and the copper ions are used as composite copper sources in the electrolyte, and the copper-doped micro-arc oxidation film formed by performing micro-arc oxidation on the chlorophyll copper complex ions and the copper ions has relatively high copper doping amount, so that the corrosion resistance and the antifouling property of the oxidation film are improved. And meanwhile, the working window is expanded when the electrolyte is used for micro-arc oxidation, and industrial application is facilitated.

The invention provides a method for preparing a silicon-copper alloy by synthesizing waste contacts through organic silicon. The method comprises the following steps that 1, the waste contacts are pretreated, specifically, the waste contacts are crushed and roasted, and waste contact oxide is obtained; step 2, electrolyte preparation: preparing NaCl, KCl, NaF and KF according to a predetermined mass ratio to serve as an electrolyte matrix, and adding a functional additive to prepare an electrolyte; and 3, the waste contact oxide and electrolyte are mixed and then subjected to melting electrolysis, high-low pulse current is adopted to enable Cu and Si to be synchronously deposited, and a silicon-copper alloy cast ingot is obtained. According to the method, the waste contact body is firstly crushed and oxidized, carbon in the waste contact body is firstly removed, and other main impurities Fe and Al exist in the oxide of the waste contact body in the form of metal oxide. In the melting electrolysis process, complex ions formed by reaction of Fe < 3 + > / Al < 3 + > and molten salt are extremely low in solubility, strict potential conditions are needed, and the complex ions are difficult to deposit at a cathode. Therefore, the prepared silicon-copper alloy is relatively high in purity, and the required energy consumption is relatively low.

This invention discloses an ion-electronic device, its fabrication method, and its applications. The ion-electronic device comprises a polymer hydrogel matrix and an organic framework material embedded therein, including anion-selective framework materials and cation-selective framework materials. The ion-electronic device of this invention constructs a microstructure with a periodic electrostatic potential field, overcoming the problem of complex ion transport paths and reduced efficiency caused by the disordered microstructures of traditional ion conductors. The organic framework material simulates the function of the lattice potential field in a semiconductor within an organic molecular system. Through the spatial confinement effect of the ordered periodic structure and the synergistic effect of the electrostatic field, it can achieve highly selective transport of specific charged ions, thereby significantly improving the efficiency and selectivity of ion transport.

This invention relates to the field of piezoelectric ceramics technology, and in particular to a composite ion-modified bismuth layered bismuth titanate calcium-based high-temperature piezoelectric ceramic and its preparation method. The general formula for high-temperature piezoelectric ceramics is: Ca 1‑x (LiCe) x / 2 Bi 3.75 Nd 0.25 Ti 3.935 Sc 0.065 O 15 , where x is a complex high-valence ion (LiCe). 4+ Twice the molar amount, x = 0.02, 0.05, 0.08, 0.10. This invention employs the above-mentioned composite ion-modified bismuth layered bismuth titanate calcium-based high-temperature piezoelectric ceramic and its preparation method to meet the application requirements in high-temperature environments while ensuring the material's environmental friendliness.

The application belongs to the technical field of ceramic pigments, and particularly discloses a heat-reflecting brown ceramic pigment, a preparation method and application thereof. 1‑x (Li,Fe) x TiSiO5, wherein 0.1<=x<=0.4. The application is based on a stable titanium sphene crystal phase, and trivalent coloring ions Fe 3+ and monovalent Li + are co-doped in a molar ratio of 1:1, Ca 2+ in the titanium sphene structure is replaced by the composite ions, a brown titanium sphene pigment with a stable structure is formed, effective coloring of the titanium sphene is realized on the premise of retaining high reflectivity of the titanium sphene, the reflectivity of the pigment in the visible-near infrared band can reach 86-90%, and meanwhile, in the preparation, a method of ball milling followed by superfine grinding is adopted to improve the reactivity of the raw materials in the refining process by mechanical chemical action, and the color development and heat color reflection effect of the pigment are further improved.

The invention discloses a flexible ultra-sensitive capacitive humidity sensor based on electrochemical interface barrier modulation and a preparation method thereof, the sensor comprises a porous carbon interdigital electrode, a composite ionic gel layer covering the surface of the electrode, and a flexible frame structure packaging layer for packaging the electrode and the composite ionic gel layer, the composite ionic gel is composed of polyvinyl alcohol (PVA), bacterial cellulose (BC), sodium isethionate, fluorinated graphene (FG) and a deep eutectic solvent (DES). BC and PVA construct an efficient ion transmission channel and endow the sensor with excellent flexibility and mechanical strength; sodium ions ionized by water absorption of sodium isethionate and chloride ions in DES jointly realize rapid potential barrier modulation at an interface; fG regulates and controls water absorption and inhibits swelling. The sensor shows high stability within the RH range of 3%-98%, has ultrahigh sensitivity and extremely short response time, and is suitable for medical health monitoring and diversified environment humidity detection.

The application of a long-chain nitrogen-containing organic cation salt compound in the aspect of being used as a platinum group metal precipitant and a platinum group metal recovery method belong to the technical field of recycling of secondary resources of noble metals.The platinum group metal precipitant is mixed with an aqueous solution containing platinum group metal (palladium, platinum, rhodium, iridium) chloride complex ions, and the electrostatic effect of the long-chain nitrogen-containing organic cation salt in the precipitant on the platinum group metal chloride complex ions and the hydrophobic effect of the alkyl chain are utilized to precipitate the platinum group metal ions, so that the corresponding platinum group metal is obtained through solid-liquid separation and calcination.The present application provides an effective recovery method, which significantly improves the recycling efficiency of noble metal resources.The present application solves the technical problems of high residual concentration of tail liquid metal and large amount of precipitant in the previous precipitation recovery process, has the advantages of high recovery efficiency of noble metal, simplified process flow, environmental friendliness, improved resource utilization rate and the like, and provides an innovative solution for efficient recycling of platinum group metal resources.

This invention belongs to the field of mineral processing, and specifically relates to a method and application of deep sulfidation on the surface of complex copper-lead-zinc oxide minerals enhanced by a synergistic combination of mechanochemical and coordination chemistry. This invention utilizes a novel combination of copper-ammonia complex ions and ethylenediamine phosphate as activators, combined with ball milling, to facilitate deeper sulfidation on the surface of copper-lead-zinc oxide minerals. This technology, when combined with subsequent flotation reagent formulations, significantly improves copper recovery when applied to the flotation of copper oxide ores. This invention features a rationally designed composition, a simple and controllable preparation process, high recovery rate, and is suitable for industrial application.

This invention provides a supercrystalline composite ion nitriding anti-corrosion metal pot, belonging to the technical field of metal pots. It includes a metal pot body and a handle connected to the pot body, with a detachable connection between them. The metal pot body includes a metal substrate layer. At least a portion of the outer and inner surfaces of the metal substrate layer are provided with a honeycomb structure layer obtained by plasma etching. A supercrystalline composite ion wear-resistant protective layer is provided on the honeycomb structure layer. This supercrystalline composite ion wear-resistant protective layer is formed by nitrogen atoms and titanium atoms penetrating into the pot surface and diffusing inwards. This invention reduces light cooking wear, extends the lifespan of the pot, and the integration of titanium ions into the crystal lattice optimizes the structure, enhances resistance to external forces, forms a corrosion-resistant barrier, resists water vapor, salt, and acid / alkali corrosion, ensures food safety and cooking stability, and significantly improves the performance of the pot, thus possessing certain practical value.