145 results about "Cuprous ion" patented technology

An alkaline non-cyanide plating solution for copper-plating used on iron and steel base and a preparation method thereof relate to a kind of plating solution. The invention provides the alkaline non-cyanide plating solution for copper-plating used on iron and steel base and the preparation method thereof. The plating solution comprises the following components: main salt, complexing agent, conductive salt, activator, cuprous ion complexing agent, pH stabilizer and brightening agent. The method comprises the following steps: adding complexing agent in water, stirring to dissolve complexing agent, obtaining a solution A; adding main salt in the solution A, stirring to dissolve main salt, obtaining a solution B; adding conductive salt in water, stirring to dissolve conductive salt, obtaininga solution C; mixing the solution B and solution C, adjusting the pH value to 2.0-4.5 with sulfuric acid or sodium hydroxide, obtaining a solution D; adding additive in the solution D, adding water toperform constant volume process and obtaining the alkaline non-cyanide plating solution for copper-plating in the desired volume for use, wherein the additive is activator, cuprous ion complexing agent, pH stabilizer and brightening agent.

The invention relates to a method for preparing copper-titanium dioxide core-shell nanoparticles. In the method, cupric ions provided by cuprous chloride are dissolved into ammonia water; an aqueous solution of polyethylene glycol, an aqueous solution of sodium citrate, an aqueous solution of ascorbic acid, a solution of tetrabutyl titanate (absolute ethyl alcohol) and urea are sequentially addedinto the ammonia water; the ammonia water is put into a teflon-lined stainless steel autoclave after the ammonia water is stirred at room temperature; and the nearly-spherical core-shell nanoparticles are prepared through controlling the temperature and the time for the thermal reaction of the mixed solvents. In the method for preparing the copper-titanium dioxide core-shell nanoparticles, the ascorbic acid serves as a reducing agent and is used for reducing the cuprous ions; and the polyethylene glycol serves as a soft template. The method for preparing the copper-titanium dioxide core-shellnanoparticles has the advantages of simple process, environment-friendliness, low cost and the like; the outer layer of each of the prepared copper-titanium dioxide core-shell nanoparticles is anatase titanium dioxide, and the inner layer of each of the prepared copper-titanium dioxide core-shell nanoparticles is cubic-phase copper elementary substance; and the size distribution is even, and the particle size is controllable, thus the copper-titanium dioxide core-shell nanoparticles can be used as the electrode materials and the photocatalyst materials of dye-sensitized solar cells.

The invention provides a treatment method for waste water containing complex copper. The method comprises the following steps: 1) providing waste water containing complex copper, wherein the waste water includes EDTA-Cu waste water and ammonia-copper waste water; 2) adjusting the pH value of the waste water containing complex copper to 2.0 to 3.0 and adding ferrous sulphate so as to allow copper in the waste water to be converted into cuprous ions; and 3) adjusting the pH value of the waste water obtained in step 2) to 8.0 to 10.5 so as to allow the cuprous ions in the waste water to be converted into cuprous hydroxide or cuprous oxide deposition. Compared with the prior art, the method provided by the invention has the following advantages and beneficial effects: operation steps are simplified, waste water treatment cost is reduced, treatment process is easy to control and can be easily implemented in a conventional process, and the method accords with requirements of industrial mass production.

A composition and method for acidizing a formation in the presence of ferric ion, free sulfur and / or sulfides is disclosed. The composition employs a ferric ion reducing agent and a sulfide reactant separately or in combination. The ferric ion reducing agent is a thioalkyl acid. The sulfide reactant compounds include alpha-diketones and saturated and alpha-unsaturated cyclic ketones. In another aspect, the reducing activity of the thioalkyl acid is accelerated by the presence of a catalytic quantity of a compound or mixture of compounds which yield in acid solution cuprous ion, cupric ion or combinations thereof with iodide ion.

The invention relates to the field of acidic copper-containing waste liquid treatment and provides a method for treating an acidic copper-containing waste liquid. The method includes the steps that an oxidizing agent is added into the acidic copper-containing waste liquid to enable cupric ions to be converted to bivalence, so that a mother liquid is obtained, and the concentration of cuprous ions in the mother liquid is smaller than or equal to 0.5g / L; a part of copper in the solution is separated from the mother liquid in a mode of a cupric compound crystal substance to obtain a separating medium, and the soluble copper volume of the separating medium is released; and the separating medium is subjected to component adjusting and purifying treatment to enable the separating medium to recover to the condition after a copper acidic etching solution is prepared and before the copper acidic etching solution is used, an acidic etching regenerated solution is obtained to be used in a recycling mode.

The invention relates to a method to take self-catalytic reduction ammonia leaching from deep- sea multi-metal nodule, especially uses carbon monoxide as reducer. The process includes the following steps: adding grinded material to ammonia-ammiaonia sulfate solution and adding carbon monoxide to take reducing leach; concentrating and separating, filtering to gain leaching liquid A; washing filtered cake to gain the wash water B with nickel, copper, cobalt, molybdenum, and zinc; mixing the leaching liquid A and wash water B adding air to take oxidizing, filtering to gain deposit C and solution D that contains nickel, copper, cobalt, molybdenum and zinc; deposit C returning to leach, recycling nickel, copper, cobalt; recycling the valued metal in solution D. The invention could make the cuprous ion concentration stable from the copper leaching itself.

The invention discloses a production method of copper sulfate. The production method comprises the following steps: adding an oxidizing agent into an acid etching waste solution to oxidize cuprous ions and ferrous ions in the acid etching waste solution; then regulating a pH value to reach 1.7 to 1.9 and carrying out stirring and reaction; then adding activated carbon again; performing settlementlayering and taking supernatant liquid to perform filtration to obtain an impurity-removed acid etching waste solution; adding soluble magnesium salt into an alkali etching waste solution and carryingout stirring and reaction; then performing settlement layering and taking supernatant liquid to obtain an impurity-removed alkali etching waste solution; performing mixed reaction on the impurity-removed acid etching waste solution and the impurity-removed alkali etching waste solution to obtain basic copper chloride; converting basic copper chloride ammonia into copper hydroxide; then performingfiltration on copper hydroxide, washing and purifying copper hydroxide and pulping copper hydroxide; then adding sulfuric acid to be acidified until pH is 0.5 to 1.0; then performing heat filtration,cooling crystallization, solid-liquid separation and drying treatment to obtain copper sulfate. Copper sulfate produced by the method can reach electroplating grade standard; moreover, a recovery ratio of copper in the etching waste solutions is high.

The invention discloses a black phosphorus quantum dot coated by a core-shell metal organic framework. The quantum dot is characterized in that a metal organic framework is used as a matrix to coat the black phosphorus quantum dot. The metal organic framework is a composite of one or both of HKUST-1 and MIL-100. Compared with the prior art, the nano material of the invention has strong targeting and small toxic and side effects, and the microenvironment of cancer cells is utilized to degrade the metal organic framework so as to release iron ions and copper ions which are further reduced to ferrous ions and cuprous ions and to induce the decomposition of hydrogen peroxide and nitrosoglutathione to generate hydroxyl radicals and nitric oxide. The black phosphorus quantum dot can generate heat under near-infrared radiation so as to increase the temperature of tumor cells, and to achieve synergistic treatment. Finally, the material is completely degraded into metal ions and phosphate radicals which are then excreted to the outside of the body.

The present invention discloses a kit and method for modifying vitro synthesized RNA, particular: (1) in chemical synthesis of RNA, using phosphoramidite monomer with 1, 3-di-dipole group or pro-dipole group to synthesis ribonucleic acid; (2) the after or during the synthetic process, modified ribonucleic acid and corresponding pio-dipole group or biomolecular probe of the 1, 3-di-dipole group performing 'click' reaction at the present of cuprous ion compounds catalyst, the ribonucleic acid is modified. The present invention provided kit and method for modifying RNA avoid shortcomings of traditional molecule connecting method active molecule decomposition and inactivation in RNA synthesis or doff protecting group process. The invention is provided with advantages of low cost, simple operation, mild condition, good modify impression and will not affect biological activity of any RNA.

The invention discloses an application of a color development method based on nanogold aggregation to immunodetection. A compound containing terminal alkynyl is used for modifying nanogold, the modified functional nanogold can actively respond to silver ions or cuprous ions, and silver ions or cuprous ions are added, so that the modified functional nanogold produces a color development reaction due to different aggregation degrees, that is to say, a nanogold solution becomes blue from originally red; the color development reaction produced by the functional nanogold due to different aggregation degrees is applied to the immunodetection, and ultraviolet-visible absorption spectrums have a change due to different aggregation degrees of the nanogold, so that the changeable absorption spectrums can be measured through an instrument and quantitative detection in the immunodetection is realized. The ultraviolet-visible absorption spectrums in the color development reaction can be not only observed through naked eyes but also represented through the instrument, and the color development method has positive help for chemical detection, especially the immunodetection.

The invention discloses a rapid synthesis method and applications of a cuprous ion-doped zinc sulfide copper nanowire visible-light-driven photocatalyst. The cuprous ion-doped zinc sulfide copper nanowire visible-light-driven photocatalyst with high visible-light activity is rapidly synthesized through sulfuration of a sulfur source and cleaning by the pressure microwave-assisted synthesis method with water as a solvent, bivalent zinc salt as a zinc source and copper nanowires as a substrate. The catalyst disclosed by the invention has the advantages that the preparation method is simple and environmental pollution is not produced in the preparation process; a zinc sulfide energy band structure is changed through the doping of cuprous ions, so that the photoresponse of the catalyst is expanded to a visible region; the separating efficiency of electron-hole pairs is increased through the electron conduction capacity of the copper nanowires, so that the quantum efficiency of similar materials is greatly increased in the absence of noble metal; the catalyst can be widely applied to the fields of water-photolysis hydrogen production, solar cells, antibiosis, photocatalytic treatment of pollutants and the like.

The invention discloses a copper dissolving system of an electrolytic copper foil. The system comprises a primary copper dissolving system and a secondary copper dissolving system which are connectedin series, and is provided with a compressed air assembly which is used for supplying compressed air for the primary copper dissolving system and the secondary copper dissolving system, wherein the primary copper dissolving system comprises a copper dissolving tank; a heat exchange device is arranged on the lower part of the copper dissolving tank; coiled pipes and partition plates are arranged onthe upper part and the lower part of the heat exchange device to introduce the compressed air and prevent copper raw materials; the primary copper dissolving system is connected with the secondary copper dissolving system through an overflowing structure; secondary copper dissolving treatment is conducted in the copper dissolving tank of the secondary copper dissolving system; filtering and overflowing operation is conducted in the copper dissolving treatment process; and the copper dissolving system cooperates a corresponding copper dissolving method to provide and obtain copper ion-containing mixture solutions with different concentration, and the reaction rate is increased through reasonable compressed air supply. The copper dissolving quality can be effectively improved, the cuprous ion content and the organic matter impurity content of a copper sulfate solution are reduced, and the temperature of the solution is reduced.

The invention relates to a mixture ammonia leaching method of deep sea multi-metal nodule and cobalt-bearing crust that the process includes the following steps: mixing, crashing, grinding the multi-metal nodule and cobalt-bearing crust; adding the material into ammonia salt solution and adding carbon monoxide to take reducing leaching out; concentrating and separating, the supernatant returning to leaching out and the underset taking filtering to gain leaching out liquid A; washing filtered cake to gain the wash water B with nickel, copper, cobalt, molybdenum; mixing the leaching liquid A and wash water B adding air to take oxidizing, filtering to gain deposit C and solution D that contains nickel, copper, cobalt, and molybdenum; deposit C returning to leach, recycling nickel, copper, cobalt; recycling the valued metal in solution D. The invention could make the cuprous ion concentration stable from the copper leaching itself.

The invention discloses a copper ion detection method based on click chemistry and a detection kit. The bivalent copper ion is reduced to the cuprous ion under the effect of a reducing agent, so that the click chemistry reaction is activated; two sections of nucleotide sequences are connected with each other; a catalytic nucleic acid structure with catalytic activity can be further assembled after the magnetic bead separation; a substrate nucleic acid can be cut, so that fluorescence groups and quenching groups at the two ends of the substrate nucleic acid can be separated; and the copper ion concentration can be identified through fluorescence detection. The copper ion detection method has higher sensitivity; a detection limit to copper ions is 2pM; the detection has excellent specificity; the other conventional interfering ions have no influence on the detection; and the detection process is simple in operation, low in cost and suitable for quick detection for the copper ion concentration in practical samples.

The invention discloses a cyanide-free cuprous copper-plating surface modification method for a steel matrix, relating to a method for modifying the surface of a steel matrix by adopting a cyanide-free cuprous plating solution. The method solves the problem of poor coating bonding force caused by a loose displaced copper layer which is easily produced when the present cyanide-free copper-plating technology is applied to surface modification of the steel matrix. The cyanide-free cuprous copper-plating surface modification method for the steel matrix comprises the steps of (1) preparing the cyanide-free cuprous plating solution from cuprous oxide, a cuprous ion thiocarbonyl complexing agent, an organic acid complexing agent or a sodium salt thereof, a stabilizer, a pH value buffer, an inhibitor and an accelerant; (2) pre-treating the steel matrix; (3) performing cyanide-free cuprous copper-plating on the steel matrix to obtain a copper coating with good bonding force on the surface of the steel matrix. The cyanide-free cuprous copper-plating surface modification method for the steel matrix can solve the problem of cyanide-free treatment when copper is directly plated on the surface of the steel matrix at present, and is favorable for environment friendliness of a steel matrix copper-plated surface modification technology.

The invention belongs to the technical field of preparation and application of semiconductor materials, and discloses an organic-inorganic hybrid copper-based halide scintillator, preparation and application thereof, wherein the chemical general formula of the scintillator is AxCuyXz, A is [(CH3)(CH2)n]4N<+>, Cu is a cuprous ion Cu<+>, and X is halogen and is selected from at least one of Cl, Br and I. Compared with the prior art, the single crystal scintillator has the advantages that the variety of the single crystal scintillator can be effectively expanded, the emission spectrum can be adjusted in a visible light region, the fluorescence quantum yield (PLQY) reaches up to 96.7%, and the single crystal scintillator can be applied to the fields of high-energy ray detection, X-ray medical imaging and security inspection, nondestructive testing, industrial flaw detection and the like. The preparation process is simple, the cost is low, and large-scale industrial production can be realized. The flexible film obtained on the basis of the method can be particularly applied to flexible X-ray imaging, and very high imaging resolution and an excellent imaging effect are obtained.

The invention discloses a preparation method of 1,2,3-triazole compound and belongs to the field of medicament catalyzed synthesis technology. The technical scheme is characterized in that according to the preparation method of the 1,2,3-triazole compound, an end group alkyne compound and organic trinitride are respectively used as raw materials; pullulan triazole / cuprous chloride is used as a catalytic system; water is used as a solvent; the 1,2,3-triazole compound is prepared through mixed stirring reaction under the condition of the room temperature of minus 100 DEG C. According to the preparation method, pullulan polymer cotaining triazole group is applied to Huisgen cycloaddition reaction to be used as an additive to stabilize cuprous ions so that use level of catalyst in the catalytic reaction process is reduced. The catalytic system is mainly subjected to catalytic reaction in water, simple, reliable, high in yield, easy to separate, reusable, green, environmentally friendly, and the like.

The invention provides a sound absorption material. The sound absorption material comprises a heteroatom zeolite molecular sieve; the heteroatom zeolite molecular sieve comprises a framework and extra-framework cations; the framework comprises SiO2 and a metal oxide MxOy containing metal M, wherein the molar ratio of Si / M in the framework is 250-500, and the M comprises Fe; and the extra-frameworkcations are at least one selected from a group comprising cuprous ions, monovalent silver ions, monovalent gold ions, alkali metal ions or alkaline earth metal ions. The invention further provides aloudspeaker box applying the sound absorption material. Compared with the related art, the loudspeaker box has good acoustic low-frequency performance.

A process for refining a raw copper material containing a copper sulfide mineral, e.g., chalcopyrite, by the hydrometallurgical process which can leach copper out of the raw material at a high extraction while suppressing oxidation of sulfur, recover it in the monovalent state by electrolysis and, at the same time, recover a concomitant valuable metal while minimizing production of wastes, e.g., leaching residue, as far as possible. The process for refining a raw copper material containing a copper sulfide mineral, comprising a chlorine-aided leaching step for leaching the raw copper material in the presence of chlorine to produce the leaching product liquor containing the copper ion, copper ion reduction step for reducing the leaching product liquor in the presence of a reductant to produce the reduction product liquor containing the cuprous ion, solvent extraction step for treating the reduction product liquor to produce the stripping product liquor containing the copper and raffinate, copper electrowinning step for electrolyzing the stripping product liquor to produce the electrolytic copper, solution purification step for treating the raffinate to produce the purified solution and iron recovery step for treating the purified solution to recover the iron-containing solid therefrom.

The invention discloses an oxidation treatment method for organic pollutants based on sulfur-oxygen radicals. Sulfites (including Na2SO3, K2SO3, (NH4)2SO3, NaHSO3, MgSO3, Al2(SO3)3, Fe2(SO3)3 and ZnSO3) are catalyzed by copper hydroxide colloid formed by copper ions or cuprous ions in an alkaline condition (the pH value is 8-11), and react to generate sulfur-oxygen radicals (including peroxosulfuric acid radical (SO5.-), sulfate radicals (SO4.-), and sulphurous acid radicals (SO3.-)), wherein the sulfate radicals react with hydroxyl ions (OH-) to generate hydroxyl radicals (HO.); and then pollutants in water are oxidized by using these sulfur-oxygen radicals and the hydroxyl radicals. Oxidants such as hydrogen peroxide and peroxysulphate are not required, so that the method is simple and convenient to operate, high in oxidation efficiency and high in speed, the pollutants can be oxidized under an anoxic condition, and therefore, the oxidation treatment method has a wide application prospect.

The invention relates to a treatment method of copper chloride hydroxide production wastewater. The treatment method comprises the following steps: carrying out solid-liquid separation treatment on production wastewater so as to obtain a first liquid supernatant, adding ammonia water into the first liquid supernatant so as to form a mixing system, and adjusting the pH value of the mixing system to be 4.5-5.5; oxidizing the mixing system so as to completely convert cuprous ions into copper ions, thereby obtaining first wastewater; feeding the first wastewater into an ion exchange system to remove free copper ions through adsorption, thereby obtaining second wastewater, wherein the ion exchange system comprises a plurality of reaction columns which are connected in series and filled with active resins, and the flow rate of the first wastewater in the reaction column is controlled to be 8-10m3 / h; feeding the second wastewater into an evaporation system to evaporate, thereby obtaining a concentrated solution, and then carrying out cooling, crystallizing, and solid-liquid separation treatment on the concentrated solution so as to obtain ammonium chloride. According to the treatment method, the recovery rate of resources in production wastewater is effectively improved, and the production efficiency also can be improved; and meanwhile, the method is environment-friendly, and has a good application prospect.

The invention discloses a chlorine-free acid etching solution regeneration and copper recovery device and a method thereof. The regeneration and copper recovery device comprises an etching tank (1), an electrolytic tank (2), a regeneration cylinder (3) and a secondary electrolytic tank (4), wherein the electrolytic tank (2) and the secondary electrolytic tank (4) are respectively provided with ananode area and a cathode area, the anode area and the cathode area are connected with the regeneration cylinder (3) through a pipeline, cuprous ions in etching waste liquid can be oxidized and used asetching liquid to return to the etching tank (1), and when oxygen in the regeneration cylinder (3) is insufficient to completely oxidize the copper oxide ions, the secondary electrolytic tank can bestarted to realize supplementary electrolysis regeneration on the etching liquid in the regeneration cylinder (3). The regeneration and copper recovery device has the beneficial effects that the electrolytic etching waste liquid can be recycled, chlorine is not generated in the working process, and the etching waste liquid can be regenerated and recycled while elemental copper is recycled.

The invention discloses an integrated particle type immobilized enzyme biosensor and a preparation method and application thereof. According to the integrated particle type immobilized enzyme biosensor and preparation method and application thereof, Hdetzs, cuprous ions and enzymes are used to react under mild conditions, and construct an integrated immobilized enzyme biosensor Enzyme@MAF-2 with optical oxygen sensing performance and efficient enzymatic catalytic activity. The sensor has the advantages that the immobilized enzyme is high in stability, good in selectivity and reusability. Moreover, the integrated sensing form can directly respond to substrates without adding other auxiliary reagents, greatly simplifying the detection step and reducing the detection cost. The integrated particle type immobilized enzyme biosensor is the first integrated biosensor that uses MOFs with optical sensing performance as immobilized enzyme carriers.

The present invention discloses a succinimide cyanogen-free monovalent copper plating electroplating liquid and an electroplating method thereof, wherein the succinimide cyanogen-free monovalent copper plating electroplating liquid comprises CuCl with a content of 10-25 g / L, succinimide with a content of 49-83 g / L, a sulfite with a content of 20-40 g / L, tetraethylenepentamine with a content of 0.15-0.5 g / L, and a citrate with a content of 10-20 g / L. According to the present invention, the cuprous salt of CuCl is adopted as the copper source, the sulfite is adopted as the stabilizer of the monovalent copper ions, the succinimide is adopted as the coordination agent of the cuprous ions, the tetraethylenepentamine is adopted as the brightener, and the citrate is adopted as the electric conduction salt, such that the plating liquid has characteristics of good dispersion capacity, good deep capacity, high cathode current efficiency, and excellent plating liquid performance; and the plating layer obtained through electroplating by using the plating liquid under the acid condition has the low porosity, and the plating layer obtained by using the plating liquid has the good quality.

The invention relates to a Cu (I) coordination polymer green light emitting material and a synthesis method thereof. The coordination polymer green light emitting material has a chemical formula: {[Cu2 (SQPA)].(4,4'-bipy) 1.5.H2O].H2O]}n, wherein n is greater than 1; the material can be excited by visible light to emit green fluorescence. The light emitting material can meet requirements for the electronic industry, public information display, bioassay lighting, electroluminescent materials, large-screen display and the like. The preparation process and equipment are simple, starting materials are cheap and readily available, cuprous ions are contained in the material by the redox reaction between reactants. The material has good crystalline, no toxicity, no pollution, high thermal stability, excellent luminescent properties and is suitable for small and medium-scale industrial production.

The invention provides a supported organic Cu(I) catalyst and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: modifying attapulgite by using a mercapto-silane coupling agent and isatoic anhydride to obtain isatoic anhydride-mercapto modified attapulgite, and enabling cuprous ions to be supported onto the isatoic anhydride-mercapto modified attapulgite through coordination to obtain the supported organic Cu(I) catalyst. The supported organic Cu(I) catalyst provided by the invention is high in catalytic activity and easy to separate, and can be repeatedly used, and supported organic Cu(I) catalyst is capable of catalyzing Glaser coupling reaction in an aqueous phase, and the reaction can be completed through short microwave heating.

The invention discloses a method for synthesizing deuterated tazobactam. The method comprises the following steps: adding 2beta-azomethylpenicillanic acid-1beta-oxide, propiolic acid, a catalyst containing copper or cuprous ion and sodium ascorbate in a deuterated solvent in turn, stirring at 25-200 DEG C for reaction for 1 to 48 hours, and after the reaction, performing extraction, filtering and column chromatography to obtain the deuterated tazobactam. Through the method, according to the method for synthesizing the deuterated tazobactam, the deuterated tazobactam is a novel beta-lactamase inhibitor of the penicillanic sulfone type and can be used for treating various bacterial infections; the method has the characteristics of mild reaction condition, short synthesis procedure, simple process and high yield, the safety during the reaction is effectively improved by using propiolic acid as the raw material, and the carbon-deuterium chain in the obtained deuterated tazobactam molecule is so stable that the medicine decomposition process can be effectively retained, therefore, the deuterated tazobactam has a longer action time in the body and is better than the normal tazobactam.

The invention relates to a method for preparing a cuprous compound, in particular to a method for preparing a cuprous compound from a cupric solution. The method comprises the following steps: in a solution containing cupric ions, in the existence of ligands which can form complex ions with cuprous ions, electrochemical reduction is performed on the cupric ions so that the cupric ions in the solution are only converted to cuprous complex ions, and the cuprous complex ions are used to prepare cuprous salt or cuprous oxide. The invention provides a simple and practical method for preparing cuprous ions from cupric ions; and the obtained solution containing cuprous ions can be used for conveniently preparing the cuprous compound. The obtained compound is easy to separate and purify.

The invention discloses a cuprous oxide / ionic liquid / composite carbon paste electrode and application thereof, relating to the trivalent arsenic electrochemical detection field. The cuprous oxide / ionic liquid / composite carbon paste electrode is prepared from cuprous oxide, graphite powder, ionic liquid and adhesive by a grinding method; the composite carbon paste electrode serving as a working electrode, a saturated calomel electrode serving as a reference electrode, and a platinum sheet serving as a counter electrode are combined to form a three-electrode system; trivalent arsenic is detected in a 0.01-0.5mol / L phosphate buffered solution with pH value of 3-10; and the scanning rate is 0.05-0.2V / s and the electric potential range is -0.8V to 0.8V. The cuprous oxide / ionic liquid / composite carbon paste electrode has the characteristics of simplicity in preparation method, large specific surface area, easiness in electrode surface updating, wide electric potential range, low price, good reproducibility and the like, and can be used for detecting trivalent arsenic in a water sample conveniently, sensitively and rapidly in an online manner.

This invention provides a cuprous-ion complex having thermal-activation delayed fluorescence and preparation and application thereof. A structural general formula of the complex is (CuX)mLn, wherein X is Cl, Br, I or CN, L represents a nitrogenous organic compound, m represents 1-4, and n represents 1-4. The preparation method includes the steps that a cuprous source CuX and an organic ligand L are subjected to vacuum co-evaporation, solution spinning, solution printing or blending milling to obtain the cuprous-ion complex described in claim 1 or 2. The cuprous-ion complex is applied to electroluminescent elements. The cuprous-ion complex having thermal-activation delayed fluorescence has the advantages of rich ligand sources and high efficiency. The preparation process is simple, and the cuprous-ion complex is suitable for industrialized popularization and application.