112 results about "Cadmium Metal" patented technology

The invention discloses test paper for rapidly detecting the immunochromatography of cadmium ion colloidal gold and a preparation method and application thereof. The test paper consists of a sample pad, a colloidal gold combination pad, a nitrocellulose membrane, absorbent paper and a plastic base plate; The sample pad, the colloidal gold combination pad, the nitrocellulose membrane and the absorbent paper are sequentially stuck on the plastic base plate; an anti-cadmium ion monoclonal colloidal gold label is coated on the colloidal gold combination pad; a goat anti-rat IgG antibody and a complete antigen Cd-iEDTA-BSA of heavy metal cadmium are sequentially coated on the nitrocellulose membrane; the goat anti-rat IgG antibody is used as a quality control line; and the complete antigen Cd-iEDTA-BSA of the heavy metal cadmium is used as a test line. The test paper detects residual metal cadmium in ambient soil, a water body and an aquatic product based on the immunology theory of antigen antibody; and compared with the prior detection system, the test paper has the advantages of rapidness, cheapness, convenience, sensitivity and speciality, can give a result within five minutes and is convenient to carry along to carry out field monitoring.

A method for purifying zinc sulfide solution comprises the following steps of: firstly, removing suspended solids from zinc sulfide solution by using a sean filter at a normal temperature; secondly, adding zinc powder by 120% of solution copper metal weight, stirring for 90 minutes at normal temperature for removing copper, and filtering; thirdly, adding zinc powder by 120-150% of solution cadmium metal weight, stirring for 60 minutes at a normal temperature for removing cadmium, and filtering; fourthly, increasing the temperature of the solution to the range of 82-94 DEG C, adding zinc powder in a proportion of 1 g/L of solution, and simultaneously adding some antimonous oxide, stirring for 50-70 minutes, removing cobalt and nickel impurities, and filtering; and finally, removing few suspended solids from the filtered solution by the sean filter. The method provided by the invention is capable of directly producing copper slag and sponge cadmium product; and the solution is capable of meeting the quality standard requirements of fresh electrolyte even though no extra zinc powder is added to the solution to remove residual cadmium; therefore, the consumption of the zinc powder is effectively reduced.

The invention discloses a novel and stable g-C3N4/NiO photoelectric hydrogen production electrode preparation method, and belongs to the technical field of inorganic chemistry and photoelectrocatalysis. The g-C3N4 light absorber is nonmetal and is made of nontoxic and easily available materials. The preparation method solves the problem that in the prior art, usually a toxic cadmium metal chalcogenide as the light absorber, and utilizes the g-C3N4 as the photoelectric cathode light absorption agent and cocatalyst for the first time. The preparation method includes: 1 taking FTO electro-conductive glass as the substrate and using a hydrothermal method to prepare ordered NiO films; and 2 immersing the NiO/FTO electrode obtained by the last step in the saturated thiourea solution for 4h, and then placing the NiO/FTO electrode in a muffle furnace for calcining for 2h by 500DEG C, and then taking out and obtaining the g-C3N4/NiO/FTO electrode. The preparation method is simple and easy to operate and is good for large-scale application.

Metal-organic frameworks (MOFs) may have Zn(II), Pb(II), and/or Cd(II) as a central metal ion; a 4,4′-bipyridylethylene (bpe) ligand as a first ligand; and fumaric acid (fum) and/or oxalic acid (ox) as a second ligand, wherein the 4,4′-bipyridylethylene ligands are stacked in the MOF, and wherein a distance between two consecutive 4,4′-bipyridylethylene ligands is less than 5 Å. Cycloadditions, particularly photoinduced [2+2] cycloadditions may be catalyzed by such MOFs, and/or the conversion of photoinduced [2+2] cycloadditions in inventive MOFs may be increased by mechanical force, such as by grinding.

The invention discloses a metallic fast reactor fuel element irradiation test device. The device can be used for carrying out neutron irradiation test on metallic fast reactor fuel in a thermal spectrum research reactor and has the functions of neutron spectrum hardening, metallic fuel irradiation temperature control, fuel element heat release power measurement and the like. The device comprises aprotection tube, a cadmium tube, an irradiation test piece, a related gas pipeline, a thermocouple and the like. According to the device, a cadmium metal layer is adopted to absorb thermal neutrons to reduce the thermal neutron flux rate in the device, so that the neutron energy spectrum of a test fuel element is close to that of a fast neutron reactor; and the temperature difference is established between air gaps and a liquid metal layer outside a fuel rod, and the gas components in the air gaps in each irradiation part are independently adjusted, so that the temperature of fuel core bodiesin different irradiation parts are controlled within a required temperature range.

The invention provides a sepia pharaonis neuropeptide GnPH procreation regulation preparation. The sepia pharaonis neuropeptide GnPH procreation regulation preparation is prepared by the steps: 1) pre-treatment: taking live sepia pharaonis, dissecting the live sepia pharaonis to take a brain tissue and preserving the brain tissue in a preservation solution at an ultra-low temperature; 2) taking of supernatant: taking the brain tissue, adding saline of the same volume to the brain tissue, homogenizing and centrifuging an obtained mixture to take supernatant A; adding distilled water of the same volume to the obtained mixture, centrifuging the mixture with the distilled water to take supernatant B; and combining the supernatant A and the supernatant B to obtain supernatant C; 3) column chromatography: carrying out column chromatography, chromatography and developing on the supernatant C and collecting components to obtain neuropeptide; and 4) catalysis: enabling the neuropeptide to have substitution reaction with a GnRH derivative under the catalysis of ammonium nitrate and cadmium metal to generate the sepia pharaonis neuropeptide GnPH procreation regulation preparation. The sepia pharaonis neuropeptide GnPH procreation regulation preparation, provided by the invention, has the advantages that the tissue can be preserved in a frozen manner and the preservation effect is excellent; the brain tissue degradation of the sepia pharaonis can be effectively prevented; the extraction rate of the neuropeptide is higher; the prepared control agent does not need to be continuously or repeatedly injected for a long time; and the preparation is applied to drugs for preventing or treating hormone-dependent diseases.

The invention discloses a cadmium metal organic complex with fluorescence property as well as a preparation method and application thereof. The complex has a chemical formula of [Cd3(BPDPE)(BDC)3.(DMF)2]2.DMF.2H2O, wherein the BPDPE is 4,4'-dipyridyl diphenyl ether, and the BDC is terephthalic acid anion. The complex belongs to an orthorhombic system, Pbcn space groups, and cell parameters are that a is equal to 11.5580 (11) angstroms, b is equal to 16.8150 (15) angstroms, c is equal to 55.775 (5) angstroms, alpha is equal to 90 degrees, beta is equal to 90 degrees, gamma is equal to 90 degrees, and V is equal to 10256.7 (17) angstroms<3>. The preparation method of the cadmium metal organic complex with fluorescence property provided by the invention is simple in operation, high in yield and excellent in reproducibility, and the prepared cadmium organic complex is stable in structure at a room temperature, has excellent fluorescence property, and is capable of detecting metal ions andsmall organic molecules.

The invention relates to a cadmium (II) metal organic complex based on 5-amino isophthalic acid influenced by solvent and preparation method thereof. The metal organic complex is a cadmium metal organic complex with repeated unit of [(Me2NH2)2Cd2(NH2-BDC)3(H2O)].DMF.8H2O. The NH2-BDC in the chemical formula [(Me2NH2)2Cd2(NH2-BDC)3(H2O)].DMF.8H2O is 5-amino isophthalic acid ligand. The DMF is N, N-dimethylformamide. The Me2NH2 is produced by the degeneration of solvent DMF. The Cd(II) metal organic complex emits blue fluorescent light, and can be used as fluorescent material.

The invention discloses an electrocoppering method for TC2 titanium alloy. The method comprises the following steps of (1), selecting Emery with the particle size not larger than 60 meshes for performing abrasive blasting on the TC2 titanium alloy, wherein the abrasive blasting pressure ranges from 0.3 MPa to 0.5 MPa; (2), performing activating treatment on the TC2 titanium alloy in acid solutions after abrasive blasting, and reducing the thickness of the surface of the TC2 titanium alloy by two micrometers to seven micrometers; (3), placing the activated TC2 titanium alloy in the sulfuric acid and hydrochloric acid mixed solutions with the temperature of 18 DEG C to 25 DEG C for 30 min to 60 min for hydrotreating; (4), performing copper plating on the hydrogenated TC2 titanium alloy. According to the method, the binding force of the surface of the TC2 titanium alloy and a plating layer of the TC2 titanium alloy is ensured and improved, the electrical conductivity of the TC2 titanium alloy materials is improved, contact corrosion is prevented from happening to the TC2 titanium alloy materials and cadmium metal, and then the comprehensive performance of the TC2 titanium alloy materials is improved.

The invention aims to provide a method for preparing cadmium metal from a copper and cadmium slag leachate, solving the problems of short process flow of recovering cadmium from the copper and cadmium slag leachate, poor work environment and inconvenience in transportation in the prior art. The cadmium metal is prepared through ball-milling, leaching, deironing, filter-pressing and cooling so that the strip-shaped cadmium metal is obtained. According to the method, the cadmium preparing flow is shortened, and the strip-shaped cadmium metal with high grade of more than 95 percent is produced, so that cadmium ions in the copper slag leachate are separated out in a strip-shaped cadmium metal form, the convenience is brought for transportation and storage; the labor intensity of employees and the environment pollution are reduced, and better economic and social benefits and popularization values are achieved.

The invention discloses a cadmium metal organic complex. The chemical formula of the cadmium metal organic complex is [Cd(BPDPE)(NDC) (H2O)] H2O, wherein BPDPE is 4,4'-dipyridine diphenyl ether, NDC is 2,6-naphthalene diacid anions, the cadmium metal organic complex belongs to a triclinic system and a P-1 space group, and cell parameters are shown in the description. The disclosed cadmium metal organic complex can be stable at room temperature for several months, and has good stability. The invention further discloses a preparation method of the cadmium metal organic complex. The method is simple, high in yield and good in repeatability.

The invention provides a talaromycesveerkampii strain for degrading cellulose and adsorbing cadmium. The strain is classified and named as talaromycesveerkampii CAF2, and the preservation number of the strain is ACCC 32732. The cadmium ion concentration tolerance range of the talaromycesveerkampii strain is 0-100 mg/L. The talaromycesveerkampii strain can produce cellulase and has a good degradingeffect on rice straw, and when the strain is applied to degrading the rice straw, in the 15 th day, half of the rice straw is degraded; meanwhile, the strain has the capability of adsorbing heavy metal cadmium, and when the strain is applied to cadmium-polluted soil treatment, in the 30 th day, the adsorption rate of the talaromycesveerkampii strain on cadmium exceeds 74%. The strain is applied to bioremediation of cadmium-polluted rice fields, and can achieve the effect of solving soil heavy cadmium metal pollution while the rice straw is degraded.

The invention provides a buffer layer of a flexible thin film solar cell and a preparation method thereof. The buffer layer of the flexible thin film solar cell is a Zn1-xMxS thin film, wherein M may be doped metal ions; and x is more than 0 and less than 1. The preparation method for the buffer layer of the flexible thin film solar cell comprises the following step of: Z, chemically reacting a Zn-containing compound with an S-containing compound and adding the metal ions in the chemical reaction for metal ion doping to form the buffer layer on a flexible substrate. The buffer layer of the flexible thin film solar cell and the preparation method thereof have the advantages of solving the problem of environmental pollution of cadmium metal and improving the optical and electrical properties of the thin film, along with proper forbidden gap.

The invention discloses a method for treating cadmium containing soil by utilizing low-accumulation cadmium crops. The method comprises the following steps: selecting a sweet potato variety with low cadmium absorption, high tolerance and high yield; applying lime and a ZH-type soil conditioner, adjusting the pH value and the like of soil, and restoring the soil in a polluted area; performing a mode of intercropping corn and sweet potato, and guaranteeing growth and yield of the sweet potato by adopting a special sweet potato standardized cultivation technology; and after harvesting of spring cropping and autumn cropping, performing autumn planting of the sweet potato so as to guarantee adequate yield and full utilization of land. The invention has the following beneficial effects: absorption and accumulation of crops in a cadmium polluted area to cadmium metal are reduced; the cost of treatment is low; and no secondary pollution occurs.

The invention discloses an efficient composite Fenton reagent. Ferrous oxalate is used as a main catalyst; other metal salts which are one or several kinds of materials from copper metal salts, cobaltmetal salts, aluminum metal salts, manganese metal salts, nickel metal salts, cadmium metal salts, chromium metal salts, cerium metal salts and palladium metal salts, are added; The reagent has the advantages that the cost during the sewage treatment can be obviously reduced; a complicated device is not needed; the oxidization efficiency is obviously improved; meanwhile, the requirement on the use environment is reduced; good oxidization capability is realized under the acidic and basic conditions; meanwhile, the preparation method of the composite Fenton reagent is simple; the operation is convenient.

The invention provides a cadmium metal organic framework material as well as a preparation method and application thereof. The cadmium metal organic framework material is a three-dimensional porous material, and belongs to a monoclinic system, and the space group is P21/c; and cell parameters are as follows: alpha/deg = 90.0, beta/deg = 101.2196 (11) and gamma/deg = 90.0. The cadmium metal organicframework material disclosed by the invention is a three-dimensional porous material, and a preparation process is simple, strong in operability, low in reaction temperature and high in process safety. An anionic cadmium metal organic framework material is constructed by using a pentacarboxylic acid ligand, and carboxyl on an intermediate benzene ring does not participate in coordination and extends into pore channels in a deprotonation form, so that -COO- exposed in the pore channels and cationic dye generate strong electrostatic interaction. The anionic cadmium metal organic framework material has columnar pores, and can separate dye according to the molecular size and electrification of dye molecules. The dye subjected to adsorption separation can be desorbed, recycled and utilized.

The invention discloses a preparation method for cadmium sulfide quantum dots. The preparation method is characterized by including steps of uniformly mixing thioacetamide liquor with the concentration of 0.05-0.15mol/L and potassium chloride liquor with the concentration of 1-3mol/L, adding thiohydracrylic acid and water to stir, and adjusting a pH (potential of hydrogen) value to 10-13 so as to obtain electrolyte; leading high-purity nitrogen into the electrolyte and maintaining for 20-40 min to remove air; and inserting a cadmium metal wire of a working electrode and a platinum wire of an auxiliary electrode into the electrolyte to stir, then applying phase step oxidation current with 10-1000 microamperes onto the cadmium working electrode, electrolyzing for 60-240min, and obtaining cadmium sulfide quantum dot stock solution after electrolyzing. The preparation method has the advantages that the method is simple, convenient, environment-friendly and fast and is low in cost, water solubility of products is good, and the prepared cadmium sulfide quantum dots are uniform in size and good in fluorescence and electrochemiluminescence performance.

The invention discloses a fertilizer for reducing a rice cadmium content, a preparation method and application thereof. The fertilizer for reducing the rice cadmium content is prepared from the following ingredients in weight ratio: 10% to 16% of amino acid, 2% to 3% of compound sugar alcohol, 25% to 28% of monopotassium phosphate, 1.3% to 1.6% of instant boron, 14% to 21% of a metal chelating agent, 0.6% to 0.9% of a complexing agent, 2% to 4% of a surface active agent and the balance of water. According to the fertilizer for reducing the rice cadmium content, the preparation method and the application thereof disclosed by the invention, the content of cadmium metal in the rice can be effectively reduced, the content can be lower than the maximum limit standard of the national cereal cadmium content, and the rice quality is improved.

The invention discloses a preparation method of a cadmium metal organic complex. The preparation method is characterized by comprising the steps: adding a mixture of 0.2mmol of 6-aminonicotinic acid and 0.1mmol of Cd(NO3)2.4H2O into 10ml of distilled water, adding a NaOH solution dropwise until a pH value is 2-4, fully mixing, putting a mixture into a stainless steel reaction kettle with polytetrafluoroethylene as a liner, carrying out hydrothermal reaction with 2.9-3.2d under the condition of 430-440K, and slowly cooling to the room temperature to obtain a colorless tabular crystal, i.e., the cadmium metal organic complex. The cadmium metal organic complex has the fluorescence and can be applied to fluorescent materials.

The invention belongs to the technical field of synthesis of functional porous coordination polymer materials, and particularly relates to an iron ion fluorescent probe porous material and a preparation method thereof. According to the method, 2-(4-carboxyphenoxy) terephthalic acid serves as an organic raw material and is subjected to a solvothermal reaction with cadmium metal salt, and a novel porous coordination polymer material with the fluorescence property and the iron ion fluorescent probe function is obtained through a ternary mixed solvent system. The material has the advantages of being good in dissolubility, high in thermal stability, high in yield, high in purity, high in crystalline quality and the like.

The invention relates to a method for reclaiming cadmium metals from cadmiferous waste materials, comprising the following steps: organic substances and water in the cadmiferous waste materials are removed; cadmium oxides in the cadmiferous waste materials after removal of the organic substances and the water are reduced to elementary cadmiums in reducing atmosphere; the elementary cadmiums are then evaporated into cadmium vapor; the cadmium vapor is condensed into cadmium metals, wherein, the reducing atmosphere is formed by reducing gas which comprises main air flow and auxiliary air flow; the main air flow and the auxiliary air flow conversely blows towards the cadmiferous waste materials after removal of the organic substances and the water; linear velocity of the auxiliary air flow is higher than that of the main air flow. The method for reclaiming the cadmium metals from the cadmiferous waste materials provided by the invention has the advantages of low energy consumption and simple procedures.

The invention relates to a method for preparing a cadmium sulphide/graphite oxide composite material in a solid phase and belongs to the field of preparation of nano materials. The method provided by the invention comprises that cadmium metal salt, graphite oxide and thioacetamide react at room temperature, and low heat solid-phase synthesis of the cadmium sulphide/graphite oxide composite material is achieved. The low heat solid-phase chemical method for preparing the cadmium sulphide/graphite oxide composite material has the characteristics of easy operation, no solvent, high yield, low cost and simple synthetic process; and the cadmium sulphide/graphite oxide composite material prepared by the invention has large specific surface area and high reaction activity and has a broad application prospect in the fields of solar cells, photocatalysis and the like.