328 results about "Cupric Ion" patented technology

An etchant of the present invention includes an aqueous solution containing hydrochloric acid, nitric acid, and a cupric ion source. An etching method of the present invention includes bringing the etchant into contact with at least one metal selected from nickel, chromium, nickel-chromium alloys, and palladium. Another etching method of the present invention includes bringing a first etchant that includes an aqueous solution containing at least the following components A to C (A. hydrochloric acid; B. at least one compound selected from the following (a) to (c): (a) compounds with 7 or less carbon atoms, containing a sulfur atom(s) and at least one group selected from an amino group, an imino group, a carboxyl group, a carbonyl group, and a hydroxyl group; (b) thiazole; and (c) thiazole compounds; and C. a surfactant) into contact with a surface of the metal, and then bringing a second solution that includes an aqueous solution containing hydrochloric acid, nitric acid, and a cupric ion source into contact with the surface of the metal. According to the etchant and the etching methods of the present invention, it is possible to etch at least one metal selected from nickel, chromium, nickel-chromium alloys, and palladium quickly and suppress excessive dissolution of copper.

A catalyst comprising a zeolite loaded with copper ions and at least one trivalent metal ion other than Al⁺³, wherein the catalyst decreases NO_x emissions in diesel exhaust. The trivalent metal ions are selected from, for example, trivalent transition metal ions, trivalent main group metal ions, and/or trivalent lanthanide metal ions. In particular embodiments, the catalysts are selected from Cu—Fe-ZSM5, Cu—La-ZSM-5, Fe—Cu—La-ZSM5, Cu—Sc-ZSM-5, and Cu—In-ZSM5. The catalysts are placed on refractory support materials and incorporated into catalytic converters.

The present invention relates to rhodamine 6G hydrazide salicylal azomethine, a synthesization method and an application in the content determination of cupric ions, which belong to the field of the analysis and determination of cupric ions in water sample. The molecular structural formula of the rhodamine 6G hydrazide salicylal azomethine is shown on the right, and the present invention discloses the synthesization method of the rhodamine 6G hydrazide salicylal azomethine and rhodamine 6G hydrazide salicylal azomethine solution used for the content determination of a small amount of cupric ions in water sample: 0 percent to 98.99 percent of ethanol, 99.99 percent to 1 percent of acetic acid / sodium acetate buffer solution with the pH value of 5 to 9, in which the total concentration of acetic acid is 1 to 100 millimoles per litre, 0.01 percent of N, N-dimethylformamide and 1ppm to 100ppm of rhodamine 6G hydrazide salicylal azomethine, all measured in mass percentage. By a spectrophotometer, the solution can be used for the accurate quantitative determination of 0.005ppm to 0.256ppm of cupric ions in water sample as well as the semiquantitative determination of no less than 0.075ppm of cupric ions in water sample by direct naked-eye observation on the change of colors.

The invention relates to a fluorescent DNA-silver nanocluster, and a preparation method and application thereof. The particle size of the fluorescent DNA-silver nanocluster is 2-10nm. A water solution of the fluorescent DNA-silver nanocluster looks light pink by visual inspection, and looks shiny red under irradiation of an ultraviolet lamp with the wavelength of 360nm. The water solution is excited by light with the excitation wavelength of 530nm, the emission wavelength is 570-800nm, and high fluorescence emission strength is acquired at the wavelength of 618nm; rhodamine B is taken as a reference substance, and fluorescence quantum yield is 35.3%. A method for detecting cupric ions and pyrophosphate ions by the fluorescent DNA-silver nanocluster includes (1), drawing a response standard curve of the corresponding ions to acquire a linear regression equation; (2), substituting the detected fluorescence strength into the linear regression equation to obtain the concentration of the cupric ions or the pyrophosphate ions. The fluorescent DNA-silver nanocluster has the advantages of stable performance and environment friendliness, the detection method is rapid and simple, and the detection sensitivity is high.

The invention relates to a method for fast removing metal copper ions in waste water by a magnetic adsorbent, which comprises steps that: (1) a chitosan solution with the mass fraction of 16 percent is used to wrap a Fe3O4 magnetic powder to prepare magnetic nanometer particles; (2) an acetic acid buffer solution with a pH value of 5.6 is used for swelling the magnetic nanometer particles and carrying out the surface chemical modification so as to prepare a novel magnetic adsorbent; (3) a magnetic nano-adsorber of 10-120mg is used for adsorbing a copper ion solution with the volume of 10ml and concentration of 40-800ppm at a temperature of 22 DEG C and a speed of 100rpm, and the solution undergoes the elution by an eluant with the volume of 20ml and concentration of 100mmol/L, thereby obtaining the regenerative magnetic nano-adsorber; and (4) the adsorption conditions of the magnetic nano-adsorber are optimized through adjusting the adsorption conditions. The method has advantages of simple and convenient operation, short time consumption, allowing fast feeding, convenient and rapid elution and strong regenerative power.

The invention discloses a method for recovering copper ions in copper-plating cleaning solution. The method comprises the following steps of filtration pretreatment, first-stage cyclic separation, second-stage cyclic separation and chemical concentration. The method which adopts a membrane cyclic separation technique plus a chemical concentration method realizes the decomposition, concentration and complete on-line recycling of electroplating waste liquid, realizes real zero emission, is very simple and economical, and solves the problem of the industrialization of an electroplating waste liquid treatment zero-emission technique from research experiments to practical application.

The invention provides a method for detecting copper ions. In the method provided by the invention, a strong oxidizer and a complexing agent are added to gold nano particle sol, and the color of the solution is changed when the copper ions exist in the solution, thereby detecting the copper ions; the solution comprises the complexing agent, the strong oxidizer and a solvent, wherein the complexing agent comprises a complexing agent A and a complexing agent B; the complexing agent A is a compound containing sulfur, and the concentration of the complexing agent A is 5-20mM; the complexing agent B is an ammonia compound, and the concentration of the complexing agent B is 5-40mM; the strong oxidizer is hydrogen peroxide, and the concentration of the strong oxidizer is 5-50mM; and the solvent is water. Compared with the traditional nano gold aggregated coloration method, the method provided by the invention is stronger in interference resistance on the high salt, acid and ligand in an actual sample. In the method provided by the invention, the concentration of the copper ions in visual colorimetric measurement can reach 0.05mM, and the method is good in selectivity, does not need any instrument and equipment and can be conveniently and rapidly applied to the scene detection of the copper ions.

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 a method for preparing high-purity cupric oxide powder from acid cupriferous waste liquid, which comprises the following steps: mixing the acid cupriferous waste liquid and a precipitator (such as hydrocarbonate, carbonate, ammonia, sodium hydroxide or potassium hydroxide, and the like) to react until cupric ions are completely precipitated; washing precipitated slurry with a washing agent (a water solution containing a certain amount of electrolytes) after filtration, and then washing with water; and drying, calcining and pulverizing cupriferous materials after washing to obtain high-purity superfine cupric oxide powder. The acid cupriferous waste liquid can be acid etching waste liquid produced in the production of printed circuit boards. The cupric oxide powder prepared by the method has high purity, simple processes, low production cost and high economic benefit, and is suitable for industrialized production.

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 belongs to the technical field of electrochemistry and particularly provides a copper-manganese aqueous secondary battery based on deposition/dissolution reaction on positive and negative poles. The battery system specifically comprises a negative current collector, a positive current collector, an aqueous electrolyte containing bivalent copper ions and bivalent manganese ions as well as a porous separator for separating the positive and negative poles. When the battery is charged, the bivalent manganese ions in a positive pole area lose electrons and are oxidized into solid manganese dioxide, solid manganese dioxide is deposited on the positive current collector, and the copper ions in a negative pole area gain electrons and are reduced into metal copper, and metal copper isdeposited on the negative current collector; during discharging, manganese dioxide on the positive pole gain the electrons and is reduced into bivalent manganese ions, the bivalent manganese ions aredissolved in the electrolyte, meanwhile, copper on the negative pole releases electrons and is oxidized into bivalent copper ions, and the bivalent copper ions are dissolved in the electrolyte. The battery has the advantages of ultrahigh power density, ultra-long cycle life, high safety and low toxicity, and can be widely applied to the fields of large energy storage and the like.

The invention belongs to the technical field of nanometer material preparation technology and special materials, and particularly relates to preparation of a mesoporous silica nanocomposite with the photo-thermal function and photo-thermal performance research thereof. According to the mesoporous silica nanocomposite, cetyl trimethyl ammonium chloride is adopted as a template, tetraethoxy-silicane is adopted as a silicon source, trithione propyl trimethoxy silane is adopted as a sulfydryl modifier, and the mixture is stirred under the temperature of 60 DEG C to perform a reaction to form meso-porous silicon balls; then, the obtained sample is dispersed into water, a copper ion saline solution is added into the alkaline condition, stirring continues to be performed, then, cupric ions are adsorbed, then, sodium sulfide or sodium thiosulfate water solution is added on the acid condition, and stirring is performed to obtain the mesoporous silica nanocomposite modified by copper sulfide. The meso-porous silicon balls with the photo-thermal treatment function have the advantages of being small in particle size, high in specific surface, large in capacity, good in biocompatibility and the like, and the preparation method has the technical advantages of being simple in technology, low in cost, high in photo-thermal conversion efficiency, wide in application range and the like.

The invention relates to the field of photocatalysis, and particularly relates to a visible-light-driven photocatalyst for degrading dye in wastewater, and preparation and application thereof. The visible-light-driven photocatalyst for degrading dye in wastewater is characterized in that mesoporous silicon dioxide of which the framework contains Ti atoms is used as a carrier, the mesoporous silicon dioxide carrier carries graphitic carbon nitride, and bivalent Cu ions are doped on the graphitic carbon nitride, wherein the graphitic carbon nitride with the doped cupric ions serves as a main catalyst, and the element Ti serves as a cocatalyst. The Ti atoms contained in the framework of the mesoporous silicon dioxide directly react with H2O2 in a photo-Fenton-like system to produce hydroxyl free radicals, thereby obviously improving the photo-Fenton-like reaction activity. The photocatalyst provided by the invention catalyzes degradation of methyl orange and/or rhodamine B in wastewater, and degradation can be performed at room temperature under the irradiation of visible light, thereby enabling the photocatalyst to have the advantages of mild reaction conditions, low cost and easy implementation; and the photocatalyst can be easily regenerated, and still has excellent photocatalytic performance after being regenerated many times.

The present invention relates to a selective catalytic reductant and the preparation method thereof. The present invention describes a method of preparation and/or modification of Cu/zeolite catalysts designed for the selective catalytic reduction (SCR) of nitrogen oxides with ammonia, including commercial catalysts. The method is comprising a removal of extra-lattice (extra-framework) aluminum species together with copper ions using citrate solution and a following re-insertion of copper or insertion of Cu/M ions, where M = Mg, Ca, Sr, La, Pr, B, Zr or Mg-Fe or Mg-Ce, using ion-exchange and/ or impregnation. The modified catalyst has improved and high NOx reduction properties at temperatures 170-600 DEG C and excellent hydrothermal stability up to 900 DEG C.

The invention provides a method for quickly detecting cysteine in a water solution. The method directly detects the content of the cysteine in a buffer solution (the pH value is 6.0) qualitatively and quantitatively by using xylenol orange as a developer on the basis of cupric ion Cu<2+>; the detection process is simple, the judging is objective and convenient and the method of the invention is easy to be generalized and applied. The method of the invention has exact measurement result and high sensitiveness, is not interfered by other aminophenol and negative ions, and can be generalized and applied to the determination of cysteine in clinical blood samples, urine samples and food.

The invention discloses an indolizine-rhodamine hydrazide derivative type Cu<2+> ratiometric fluorescent probe. The probe is indolizine substituted rhodamine hydrazide, and the chemical formula of the probe is as shown in formula (1). The fluorescent probe has unique fluorescent selectivity to Cu<2+> in an ethanol solution and is high in sensitivity, high in resistance to interference of other ions and promising in application prospect.

The invention discloses cupric ion test paper and a preparation method. The cupric ion test paper of the invention includes a chromogenic piece, and chromogenic substance spiropyran in the chromogenic piece, the chromogenic piece can be chromatography, qualitative, and quantitative filter paper. The invention also includes a base plate, the chromogenic piece is arrange on the base plate, the base plate can be a hardness paper piece which is a polystyrene base plate or white color and non-absorbent. The cupric ion test paper of the invention has a flowing reparation method, which steps include that: a) spiropyran solution is prepared; b) the chromogenic piece is dipped into the spiropyran solution; c) the chromogenic piece is taken out from the spiropyran solution and is dried, further include d) one or more chromogenic pieces which are dried are fixed on the base plate, the chromogenic pieces can be fixed in row or in cascading. The test paper of the invention is easy to use, high sensitivity, greater selectivity and stability, easy to preserve and is applicable for detecting consistency of bivalent cupric ion in water solution.

The invention discloses a method for quickly detecting the concentration of copper ions based on a gold nanocluster light scattering probe. The method comprises the following steps: preparing a bovine serum albumin functionalized gold nanocluster (BSA-Au NCs) light scattering probe which can be used for quantitatively detecting the concentration of the copper ions; and causing clustering under the interaction between the copper ions and the bovine serum albumin functionalized gold nanocluster so as to implement quantitative detection of the copper ions. The light scattering detection probe is easy to prepare and save; all the reagents are free of toxic and side effects. The light scattering detection method has the characteristics of high sensitivity, low detection limit, wide linear range, simplicity and convenience, and easiness in operation.

The invention discloses a carbon nano tube film load cuprum and palladium bimetallic catalyst, a preparation method and an application. The catalyst takes cuprum and palladium as catalytic activity ingredients, and carbon nano tube film modified titanium plate as a substrate. The preparation method comprises the steps of pretreating the titanium plate and a carbon nano tube respectively, taking the treated titanium plate as an anode, taking a dispersed carbon nano tube suspension as deposition liquid, depositing the carbon nano tube on the titanium plate uniformly by the electrophoresis action to form a dense carbon nano tube film, taking the dried carbon nano tube film modified titanium plate as the substrate, placing the substrate in a sodium chloride electroplating solution containing cupric ions, palladium ions and polyvinylpyrrolidone, synchronously depositing the cuprum and the palladium by an electrochemical reduction method, and obtaining the titanium-based carbon nano tube film load cuprum and palladium bimetallic catalyst. The catalyst has high and stable electrochemical activity and electro-catalytic properties, and can serve as a working electrode to degrade organic dye in a water body and reduce inorganic negative ions such as nitrate, bromate and chromate.

The invention provides a preparing method of a gold nanorod. The preparing method of the gold nanorod is characterized in that a growth solution of the gold nanorod further contains soluble copper salt, and the added quantity, relative to each mole of gold seed crystal, of the soluble copper salt is 16-400 moles. The length-diameter ratio of the gold nanorod obtained through the method is in a range of 2.3 +/- 0.3 to 3.7 +/- 0.4, the value of full wave at half maximum (FWHM) of an absorption peak of a longitudinal surface plasmon resonance is 0.20-0.22eV, and the ratio of absorbance of absorption peak positions of the longitudinal surface plasmon resonance and a transverse surface plasmon resonance (ALSPR/ATSPR) is 2.3 to 4.9. According to the preparing method of the gold nanorod, cupric ions are used for the first time to catalyze forming of the gold nanorod of high quality. The preparing method of the gold nanorod is simple in operating step, monodispersity of the size of the obtained gold nanorod is good, and performance of the gold nanorod is obviously improved. In addition, the preparing method of the gold nanorod is high in repeatability and moderate in reaction condition, and a used reagent is cheap and nontoxic.

The invention relates to a carbon quantum dot-copper ion fluorescent probe and a preparation method and application thereof. The method includes that carbon quantum dots with strong fluorescence are synthesized by the aid of a microwave hydrothermal method, fluorescence strength of the carbon quantum dots are greatly reduced by the aid of copper ions, the copper ions are composited on surfaces ofthe carbon quantum dots, surface energy is transferred, CQDs/Cu<2+> with weak fluorescence is formed, a glucose solution is added, pH value is adjusted to 7, heating is performed at the temperature of80DEG C, glucose and the copper ions undergo 'copper mirror reaction' to be oxidized to gluconic acid, and the copper ions are reduced to be precipitated to be Cu2O2. The fluorescence spectrum test shows that after the glucose solution is added, glucose is catalyzed and oxidized through the copper ions on the carbon quantum dots CQDs for reaction and is removed from surfaces of the CQDs, and thestrong fluorescence on the CQDs is restored. The carbon quantum dot-copper ion fluorescent probe based CQDs/Cu<2+> is applicable to effective detection of the glucose under non-enzymatic environment.