43 results about "Sodium selenosulfate" patented technology

The invention relates to a method for extracting selenium from selenium-deposited residue. The method comprises the following steps of: dissolving selenium-deposited residue to an alkaline sodium sulfite solution, generating water-soluble seleno sodium sulfate through a reaction between elemental selenium and the sodium sulfite solution; fully reacting the seleno sodium sulfate under the acidification of sulfuric acid to obtain a selenium elemental precipitate; and washing and drying to obtain coarse selenium with the purity of about 90 percent. The invention realizes separation of copper, silver and selenium in the selenium residue, and the separated selenium can be directly refined due to higher purity, therefore, the process flow of selenium recovery is shortened, the recovery rate is increased, and the production cost is decreased; the trouble of high copper content of an anode plate in silver electrolysis in the gold and silver refining process is solved and the pass rate of primary silver powder electrolysis is increased. The invention can be applied to recovering and extracting selenium from materials, such as selenium-contained residue generated in the technical process by using a wet method for treatment or selenium-contained acid mud generated in the production process of the copper anode slime by using a pyrogenic method for treatment and can also be applied to the production of high-purity selenium products by directly purifying a coarse selenium raw material.

The invention discloses a method for water-phase microwave preparation of CdSeS quantum dots. The method provided by the invention comprises the following steps of 1, preparing a selenosulfate solution through the reaction of selenium powder and a sodium sulfite solution, 2, weighing cadmium chloride crystals, and carrying out dissolution and volume metering by deionized water to obtain a cadmium chloride solution, 3, adding a certain amount of mercaptopropionic acid into the cadmium chloride solution, 4, adjusting a pH value of the mixed solution obtained by the step 3 to a specific pH value by a sodium hydroxide solution, 5, feeding inert gas into the mixed solution having the specific pH value to remove oxygen, and adding the selenosulfate solution obtained by the step 1 into the oxygen-free mixed solution, 6, loading the mixed solution obtained by the step 5 into a teflon-made digestion tank, and heating for a reaction by a microwave digestion furnace, and 7, cooling the reaction products obtained by the step 6 to a room temperature, adding isopropanol into the cooled reaction products, carrying out purification, and drying by a freezer dryer to obtain solid powder of the CdSeS quantum dots. The method provided by the invention is fast and simple, has easily controllable technological parameters, has a low cost, realizes small sizes and even size distribution of the CdSeS quantum dots obtained by the method, and has a high fluorescent quantum yield. The CdSeS quantum dots obtained by the method can be utilized as a biological fluorescent label material through coupling with biomolecules and can also be utilized for metal ion detection.

The invention relates to a bismuth base (bismuth selenide, bismuth telluride) hydrogen storage material and a preparation method thereof, relating to low temperature liquid phase synthesis of bismuth base material and the application thereof on hydrogen storage, lithium storage and electrode material. The invention is characterized in that water is taken as solvent, bismuth salts such as bismuth nitrate, bismuth chloride and the like as a bismuth source, and water-soluble tellurium (selenium) acid salts (such as sodium tellurite, selenium substituted sodium sulfate, sodium selenite) or tellurium (selenium) acids (such as orthotelluric acid, tellurous acid and selenous acid) as a tellurium source (selenium) source; proper coordination agents (such as nitrilotriacetic acid, hexamethylene diamine tetraacethyl and the like) and reducing agents (such as vitamin C, sodium borohydride and the like) are added for liquid phase reaction synthesis at the low temperature of 60-80 DEG C. The bismuth selenide crystal grains prepared by the invention take on flower shapes with the sphere diameter of 1-6mum, and the bismuth telluride crystal grains take on sheet shapes with nanometer diameter; the hydrogen storage performance reaches over 100mAh.g. The method has the advantages of cheap raw material, simple technique, convenient operation, easy mass production, etc.

The invention provides a method for preparing a silver selenide nanometer grain in the technical field of the composite nanometer material. The method comprises the following steps of: preparing sodium selenosulfate solution; preparing silver ion protein mixed liquor; preparing selenium-silver protein mixed liquor; carrying out centrifugation treatment; and carrying out drying treatment in vacuum to prepare the silver selenide nanometer material finally. The method has simple and novel process, fewer equipment and low energy consumption, is friendly to environment, and prepares the silver selenide nanometer material with uniform size.

A biological fermentation pig forage is prepared from the following raw materials in parts by weight: 45-53 parts of corn flour, 8-10 parts of herb of common nipplewort, 3-4 parts of konjac glucomannan, 3-4 parts of glucosamine sulfate, 35-40 parts of soybean meal, 35-40 parts of barley vinasse, 17-25 parts of wheat bran, 10-13 parts of euglena, 3-4 parts of spora lygodii, 1-1.5 parts of lactobacillus fermentum, 1-1.5 parts of aspergillus niger, 1.5-2 parts of lactobacillus plantaum, 1.5-2 parts of lactobacillus johnsonii, 0.2-0.3 part of sodium selenosulfate, 3-4 parts of vitamin e acetate, and 10-12 parts of illite powder. The biological fermentation pig forage is improved in digestion rate, and is capable of increasing digestion capability of animals on the forage and improving animal growth performance, especially is capable of enhancing immunity, possesses protrude effects on reducing pig cold and mycoplasma pneumoniae of swine, and is capable of improving pork tenderness and reducing muscle shearing force.

The invention relates to a method for microwave-assisted preparation of a CdTeSeS / ZnTe core-shell quantum dot in water. The method comprises the following steps: 1) preparing a sodium elenosulfate solution; 2) preparing a cadmium chloride solution; 3) adding mercaptopropionic acid into the cadmium chloride solution; 4) adjusting the pH value of the solution; 5) dissolving a sodium tellurite crystal in the solution and simultaneously adding potassium borohydride and the sodium elenosulfate solution; 6) subjecting a mixture obtained in the step 6) to heating reaction in a microwave digestion furnace; 7) carrying out cooling to room temperature and adding isopropanol for purification so as to obtain CdTeSeS quantum dot gel; and 8) preparing a mixed solution of the cadmium chloride solution, the mercaptopropionic acid and the sodium tellurite crystal, dissolving the CdTeSeS quantum dot gel in the mixed solution anew, adding potassium borohydride and successively carrying out heating reaction in the microwave digestion furnace, cooling to room temperature, addition of isopropanol for purification and drying with a lyophilizer so as to obtain solid powder of the CdTeSeS / ZnTe core-shell quantum dot. The method is fast and simple and has easily controllable technological parameters and a low price; and the synthesized quantum dot has uniform particle size distribution, high stability, high fluorescence quantum yield and wide emission spectrum.

The invention relates to an intermediate-infrared detector and a preparation method thereof. The intermediate-infrared detector comprises a substrate, a lead salt film and a passivation layer. The lead salt film is prepared by a selenosulfate solution, a lead acetate solution, a potassium hydroxide water solution and a soluble starch solution in the mass-volume percentage concentration ratio of 1: (0.8-3.5): (0.5-25): (0.0001-0.001) and in the size ratio of 1: (0.5-2.0): (0.5-4): (0.01-0.1). The intermediate-infrared detector improves the response rate and the signal to noise ratio, and reduces the production cost.

The invention discloses a method for purifying crude selenium through anhydrous ethanol, and belongs to the technical field of wet metallurgical engineering. The method comprises the steps that a sodium sulfite solution is used for leaching the crude selenium (containing 90%-99% of selenium), wherein the leaching temperature is 50-150 DEG C, the leaching time is 0.5-3 h, and the stirring speed is100-350 r / min; and after leaching, filtering is conducted to obtain a sodium selenosulphate leaching solution, the obtained sodium selenosulphate leaching solution and the excess anhydrous ethanol aremixed and stirred to obtain selenium precipitate, and finally the selenium precipitate is washed, filtered and dried to obtain fine selenium with the purity being 99.99%-99.999%. Metal impurities such as tellurium, lead, copper, silver and gold in leaching slag are further enriched. The anhydrous ethanol is adopted to precipitate the selenium from the sodium selenosulphate solution, thus efficient extraction and purification of the selenium are achieved, and no exhaust gases or waste residues are generated in the whole process.

The invention relates to a method for separating and extracting selenium from copper smelting wet process dust collection acid mud. The method is characterized by comprising the following extraction steps: (1), copper smelting wet process dust collection acid mud is washed by adopting sodium hydroxide as a detergent, and acid and soluble sulfate adsorbed by the acid mud are washed away; (2), the washed acid mud is leached by adopting sodium sulfite as a leaching agent, selenium is dissolved in an alkaline sodium sulfite solution to generate easily-water-soluble selenosulfate, while copper, nickel and iron are still preserved in leached slag in solid states;(3), sulfuric acid is added to a leaching solution for resolution, and the solution is subjected to heating, boiling, aging, filtering and drying so as to obtain selenium powder. The method provided by the invention is suitable for the treatment of the copper smelting wet process dust collection acid mud, is also applicable to the treatment of acid mud generated by copper smelting fume sulfuric acid production system and the treatmen of Venturi mud generated during the smelting process of rare and precious metal, and is used for recovering the selenium in the acid mud.

THe preparation method of nano copper selenide includes the following steps: firstly, preparing coordination compound of cupric ion and disodium ethylene diamine tetracetate-complexonocopper complex anion aqueous solution and aqueous solution of sodium selenosulfate, then mixing said obtained two aqueou s solutions in quartz conical flask, introducing nitrogen gas and exhausting air completely, using high-voltage mercury vapour lamp to make irradiation, using cooling water to retain and make the temp. of reaction system be room temp. and irradiating for 4-8 hr so as to obtain nano copper selenide with cubic structure and average grain size of 70-90 nm.

The invention relates to the technical field of photocatalytic degradation of organic pollutants, and discloses a carbon nanotube loaded CdSe-g-C3N4 photocatalytic material and a preparation method thereof. The photocatalytic material comprises the following formula raw materials: cadmium chloride, sodium selenosulfate, urea, melamine and carbon nanotubes. According to the material and the preparation method thereof, the formation interface of CdSe and g-C3N4 has an overlapped energy band heterostructure with good matching performance; the heterostructure can effectively separate photo-generated carriers and transmit photo-generated charges, and the effective separation of photo-induced electrons and holes is enhanced, and therefore, a large number of freely moving photo-induced electronse<-> and holes h<+> are generated; the holes h<+> have very strong oxidability, the photo-induced electrons e<-> and dissolved oxygen in water can generate superoxide free radical O<2->., holes h<+> and superoxide free radical O<2->. have very high oxidation-reduction potentials and can be subjected to an oxidation-reduction reaction with various organic pollutants, so that the degradation efficiency of the photocatalytic material on organic dye pollutants is greatly improved.

The invention belongs to the technical field of plant nutrition, relates to a method for producing selenium-enriched SOD agricultural products, and discloses enzyme amino acid nano-selenium micro-fertilizer for degrading grain pesticide residues. In 50,000 parts, the enzyme amino acid nano-selenium micro-fertilizer is prepared from the following raw materials in parts by weight: selenium-containing trace elements: 15 to 40 parts of sodium selenosulfate, 500 to 1000 parts of amino acid trace element water-soluble fertilizer, 140 to 230 parts of an electrolyte PH buffer, 50 to 100 parts of aminoacid raw powder, 230 to 360 parts of an organic material base, 250 to 375 parts of a selenium-enriched SOD nutrient material, 255 to 510 parts of probiotics and the balance of pure water. The prepared product contains 0.130 g / part to 0.350 mg / g of selenium, 450 to 1000 U / g of SOD, 15.5 to 31.0 mg / g of amino acids, 3.0 to 6.0 mg / g of copper, zinc, manganese, iron, boron and molybdenum trace elements, nano-selenium at a particle size of 20 to 40 nm and active bacteria in a total quantity more than or equal to 0.1 billion / g. The invention relates to water-soluble compound fertilizer for producing the enzyme amino acid nano-selenium micro-fertilizer of polyfunctional agricultural products without pesticides and hormones.

Disclosed is a preparation method of an ectopic adsorption silver selenide quantum dot sensitized solar cell. The method comprises the following steps: (1) cleaning a transparent FTO conductive glass; (2) preparing a deionized water solution of selenosulfate and a deionized water solution of AgNO3, preparing Ag2Se quantum dots, and dispersing the Ag2Se quantum dots into anhydrous ethanol; (3) preparing a TiO2 conductive film, performing ligand exchange on the surface of the conductive film to obtain a bifunctional molecule modified photo anode, sensitizing the Ag2Se quantum dots, and forming a quantum dot sensitized photo anode; (4) dripping an electrolyte to the middle part of the quantum dot sensitized photo anode, and diffusing the electrolyte to the working part of the whole electrode; and (5) covering a counter electrode with the electrode, and fixing the photo anode with the counter electrode together to obtain the quantum dot solar cell. By adopting the nontoxic Ag2Se quantum dots, the coverage of the quantum dots is improved in a ligand exchange manner, and the photoelectric efficiency of a device is improved.

A process for preparing the cadmium selenide nanolumps able to be used as monoelectron device includes such steps as filling distilled water into a three-opening reactor twice under the protection of Ar gas while stirring, proportionally adding CdCl2 solution and bihydrated trisodium citrate, heating, adding Na2SeSO3 solution, and reacting for 15-120 min.

A process for preparing the cadmium selenide with chain-type nano-structure includes such steps as synthesizing Cd(OH)2, adding sodium nitrate as mineralizing agent, hydrothermal growth of non-crystalline Cd(OH)2 colloid at 200 deg.C to obtain hexagonal nano-crystals used as sacrificial template, dispersing them in the solution of sodium selenosulfate, and hydrothermal synthesizing at 160 deg.C for 10 hr.

The invention provides a preparation method of a solar cell absorption layer. The preparation method comprises the following steps: A) potassium antimony tartrate, sodium thiosulfate and sodium selenosulfate are mixed with water to obtain a deposition solution; B) the deposition liquid is subjected to hydrothermal reaction on the surface of a substrate to obtain an antimony sulfide selenide film composite on the surface of the substrate; C) the obtained antimony sulfide selenide film is annealed under an inert gas environment so as to obtain the solar cell absorption layer. According to the preparation method, the antimony sulfide selenide film is directly deposited by the hydrothermal method without subsequent selenization, thus solving the problem that the solution method mostly requiressubsequent selenization. The band gap of the film can be conveniently adjusted by changing the concentration of the odium thiosulfate and the sodium selenosulfate in the deposition solution so as toobtain the antimony sulfide selenide film with adjustable band gap. Compared with other methods, the preparation equipment and process are simple, the crystallinity of the film is good, the composition and the thickness of the film are easy to control and the uniformity of the film is good.

The invention relates to a preparation device for a selenium / carbon composite electrode material and a control method. The preparation device through which sodium sulfite reacts with selenium, selenosulfate reacts with ethyl alcohol, and products are separated is designed, and it is controlled that the molar ratio of sodium sulfite to selenium is 1.05:3, the solubility of a sodium sulfite solution is 12-25 wt%, the mass ratio of selenium to carbon is 5:25, the molar ratio of ethyl alcohol to selenosulfate is 1.05:1.35 and the injection pressure is 2-15 MPa, so that it is achieved that the particle size of the selenium / carbon composite electrode material is small and selenium / carbon distribution is uniform. The prepared selenium / carbon composite electrode material has good electrochemical performance. The preparation device and the control method have good application prospects in the field of lithium ion batteries.

The invention discloses a method for fast preparing a particle size-controllable water-soluble silver selenide quantum dot. The method comprises adding a stabilizer into a silver nitrate solution under heating in a water bath and magnetic stirring, carrying out stirring, adding a dispersant into the mixture, carrying out stirring, adjusting pH of the reaction solution to greater than 7, adding a sodium selenosulfate solution into the mixture, carrying out a reaction process for 5 to 8min, carrying out centrifugation precipitation on the product, removing the supernatant, and collecting the bottom precipitates so that the particle size-controllable water-soluble silver selenide quantum dot is obtained. The method utilizes cheap and nontoxic raw materials, has short reaction time of only 10-15min, is free of inert gas protection and post-treatment and has a simple purification process. The Ag2Se quantum dot does not contain toxic heavy metal elements, has good water solubility, controllable particle size and adjustable band gap, has excellent physicochemical properties and can be used for bio-labeling, biosensing, optoelectronics and optoelectronic devices.

The invention discloses an aqueous phase microwave preparation method of CdSeTdS quantum dot-polyacrylamide nanoparticles. The aqueous phase microwave preparation method comprises the following steps: A, enabling selenium powder and sodium sulfite to react, and preparing a selenium-substituted sodium sulfate solution; B, weighing cadmium chloride crystal, dissolving deionized water, and performing volume fixation to obtain a cadmium chloride solution; C, adding thiohydracrylic acid into the cadmium chloride solution; D, adjusting the pH value by using a sodium hydroxide solution; E, adding sodium tellurate crystal, and adding potassium borohydride and the selenium-substituted sodium sulfate solution after the sodium tellurate crystal is dissolved and stabilized; F, injecting a CdSeTeS precursor solution into a bottle, injecting a polyacrylamide solution, and stirring to obtain quantum dots; G, injecting a precursor solution into a microwave reactor, and heating so as to obtain polyacrylamide nanoparticles; H, cooling, adding isopropanol, purifying, and performing freeze-drying, thereby obtaining a colloidal solid of the CdSeTdS quantum dot-polyacrylamide nanoparticles. The aqueous phase microwave preparation method is simple in process, easy to control and low in price, the light stability of a synthesized product is 20 times higher than that of a single CdTeSeS quantum dot, and the biological stability of the synthesized product is improved by 15%.

The present invention relates to a use of sodium selenosulfate for supplementing selenium and enhancing the therapeutic efficacy of chemotherapy agents for cancers, and a rapid process for preparing sodium selenosulfate comprising: mixing sodium selenite, the reducing agent and sodium sulfite in a certain proportion to form sodium selenosulfate quickly.

The preparation method of nano tricopper diselenide includes the following steps: preparing coordination compound of cupric ion and triethanolamine-triethanolaminocopper complex cation aqueous solution and aqueous solution of sodium selenosulfate, then mixing said two aqueous solutions in quartz conical flask, introducing nitrogen gas and discharging air completely, using high-voltage mercury vapour lamp to make irradiation, and using cooling water to retain and make the temp. of reaction system be room temp., irradiating for 4-8 hr, then can obtain nano tricopped diselenide with tetragonal structure and average grain size of 40-50 nm.

The invention belongs to the technical field of semiconductor materials, and relates to a preparation method of a graphene and zinc selenide and cadmium selenide core-shell microsphere composite nanomaterial. The method comprises the following steps: adding deionized water into selenium powder and sodium sulfite, and carrying out heating reaction while stirring under the protection of nitrogen toobtain a sodium selenide solution; dissolving zinc acetate, cadmium acetate and graphene oxide into water, adding the sodium seleno sulfate solution, adding hydrazine hydrate while stirring, transferring into a high-pressure reaction kettle taking polytetrafluoroethylene as a lining, and reacting at 80 DEG C for 5 hours; and putting the high-pressure reaction kettle into ice water for quenching,washing with deionized water and absolute ethanol, and carrying out vacuum drying to obtain the G / ZnSe-CdSe composite nano material. Three-order nonlinear absorption of the G / ZnSe-CdSe composite nanomaterial is saturated absorption, three-order nonlinear refraction of the G / ZnSe-CdSe composite nano material is self-focusing, and the G / ZnSe-CdSe composite nano material is expected to be applied tothe novel light control fields such as a mode-locked pulse laser, an optical switch, an optical memory and an optical modulator.

The invention provides a method for preparing a solar cell absorbing layer, comprising the following steps: A) mixing antimony potassium tartrate, sodium thiosulfate and sodium selenosulfate with water to obtain a deposition solution; B) depositing the deposition solution on the substrate performing a hydrothermal reaction on the bottom surface to obtain an antimony sulfoselenide film compounded on the substrate surface; C) annealing the obtained antimony sulfoselenide film in an inert gas environment to obtain a solar cell absorbing layer. The invention uses a hydrothermal method to directly deposit antimony sulfur selenide film without subsequent selenization, and solves the problem that most solution methods require subsequent selenization. By changing the concentration of sodium thiosulfate and sodium selenosulfate in the deposition solution, the band gap of the film can be adjusted conveniently, and the antimony sulfoselenide film with adjustable band gap can be obtained. Compared with other methods, the invention has simple preparation equipment and process, good film crystallinity, easy control of film composition and thickness, and good film uniformity.

The invention discloses a method for preparing a CuSe back electrode of a sensitization battery with activated Se disproportionation at room temperature. The method comprises the steps of (a) preparing a selenosulfate water solution, wherein firstly, sodium sulfite is dissolved in deionized water to form a sodium sulfite solution, then Se powder is added into the sodium sulfite solution, and the solution is heated until the Se powder is completely dissolved to form the selenosulfate water solution; (b) preparing red activated elemental Se, wherein firstly, the appearance of the back electrode is formed by sticking traceless adhesive tape to a conductive substrate, then the area of the appearance of the back electrode is paved with the selenosulfate water solution, then ethanol solution is sprayed to the area of the appearance of the back electrode, and the red activated elemental Se is separated out on the substrate; (c) dissolving Cu salt into ethanol, and obtaining the ethanol solution with Cu ions; (d) washing the substrate with the red activated elemental Se with the ethanol, and then immersing the substrate into the ethanol solution with the Cu ions until the reaction is complete to obtain the CuSe back electrode. The CuSe back electrode synthesized through the method is good in catalysis effect and high in stability, and the implement method is simple.

The invention belongs to the technical field of semiconductor materials, and discloses a pollution-free hydrothermal synthesis method of zinc selenide microspheres. According to the synthesis method,selenosulfate is used as a selenium source, and hydrazine hydrate is used as a reducing agent, and therefore, the raw material is non-toxic and easy to obtain; and a whole synthesis process is simpleto operate, pollution-free and harmless to operators. The invention also discloses a synthesis method of a zinc selenide microspheres and graphene composite material. The preparation process of the composite material is also simple to operate, non-toxic and pollution-free; the fluorescence intensity of the obtained composite material is higher than that of a ZnSe monomer; the fluorescence lifetimeof the obtained composite material is longer and can reach microseconds; and the composite material is expected to be applied to the field of light emitting diodes.