87 results about "Sublimed sulphur" patented technology

The invention relates to a nickel disulfide carbon nano composite material and a preparation method and an application thereof, wherein the composite material is formed by coating a nickel disulfide nanosheet with a carbon layer. The preparation method comprises the following steps of preparing a nickel hydroxide nanosheet precursor by a hydrothermal method, performing magnetic stirring and dispersing in deionized water to obtain a uniform dispersion liquid of the nickel hydroxide nanosheet precursor, adding a buffering agent tris(hydroxymethyl) aminomethane hydrochloride, and adjusting the pHvalue to be 8.5 by adopting an alkali solution with the pH value of 13, adding dopamine hydrochloride, and magnetically stirring at room temperature for in-situ polymerization, and carrying out washing and centrifugally drying to obtain a nickel hydroxide nanosheet precursor/polydopamine composite material, and carrying out heat treatment and vulcanization with sublimed sulfur powder in a tubularfurnace in nitrogen atmosphere at a certain temperature to obtain the composite material. The preparation process is simple, easy to operate, green and non-toxic and friendly in material preparationprocess; and the prepared nickel disulfide carbon nano composite material is stable in structure, uniform in morphology and high in dispersion. The obtained nickel disulfide carbon nano composite material can be an ideal electrode material of a high-performance lithium ion battery, a supercapacitor and other new energy devices.

The invention discloses a preparing method and application of NiPS3 nanosheets of a self-supporting structure, and belongs to the technical field of preparation of nanometer materials and preparationof clean energy. The preparing method aims at solving the problems that when NiPS3 serves as an HER catalyst, the superficial area is small, and the temperature required in the preparing process is high. The preparing method comprises the steps of 1, conducting ultrasonic cleaning on carbon cloth; 2, mixing red phosphorus powder and sublimed sulfur powder, and obtaining a phosphorus and sulfur powder mixture after grinding; 3, adding nickel salt, urea and ammonium fluoride into ultrapure water for stirring and dissolution to obtain a reaction solution; 4, soaking the carbon cloth in the reaction solution for a hydrothermal reaction; 5, pouring the phosphorus and sulfur powder mixture into an open reactor, putting the open reaction and a precursor together into a corundum boat, firstly, adding the phosphorus and sulfur powder mixture to be fused, then conducting sublimation, and carrying out a reaction between phosphorus and sulfur steam and the precursor at high temperature. Accordingto the preparing method, the synthesis temperature is low, an NiPS3 nanosheet catalyst and a conductive substrate are compounded to be directly used as an HER electrode, and subsequent treatment is not needed.

The invention provides a method for preparing quantum dots by using sublimed sulfur as a sulfur source, and belongs to the field of nano material preparation. The preparation method is characterized by comprising the following steps: (1) respectively adding 0.5-6 g of sodium hydroxide, 3mL of polyethylene glycol (PEG400) and 1-10g of sublimed sulfur into 50mL of deionized water, and carrying out water bath reaction at 40-80 DEG C for 3-50 hours to obtain a mixed solution; (2) changing the mixed solution obtained in the step (1) from a water bath reaction to an ice bath reaction, and under a stirring condition, adding 10-50 mL of hydrogen peroxide in parts by weight to prepare a sulfur quantum dot solution with blue fluorescence characteristics; and (3) adding an anti-solvent acetone to settle the water-soluble sulfur quantum dots, centrifuging the sulfur quantum dots settled from the aqueous solution at a centrifugal rotating speed of 9000 r/min for 5 min, and freeze-drying the obtained precipitate (at a drying temperature of -30 DEG C for 12-18 h) to finally obtain white sulfur quantum dot powder. The preparation process is green, safe and easy to prepare, fluorescence intensity is enhanced, dispersity is good, and efficiency is high.

The invention discloses a method for preparing a sulphur-supported porous carbon lithium battery electrode material by using waste polyurethane plastic. The method comprises the following steps: with sublimed sulphur, potassium carbonate and waste polyurethane as raw materials, performing high-temperature heat treatment on the raw materials in a muffle furnace to prepare porous carbon, and performing hot melting and mechanical dispersing to prepare the sulphur-supported porous carbon lithium battery electrode material active substance. The method is characterized in that elemental sulphur is calcined and melted to enter the pores of porous carbon, electrode material slurry is prepared through a mechanical dispersing method, and finally drying by a vacuum drying oven is carried out to obtain the sulphur-supported porous carbon composite electrode material. Through an electrochemical test, the novel sulphur-supported porous carbon composite electrode material is high in cyclic stability, remarkable in rate performance and simple to prepare, is prepared from cheap raw materials, and has a commercial potential; in addition, test conditions are mild.

The invention discloses a method for synthesizing a negative electrode material Fe2SSe of a lithium-ion battery by a one-pot solid-phase method. A heat treatment procedure is mild; the standing time at 400 DEG C is relatively long; and a reaction failure or a great loss of a sulfur element caused by the phenomenon that raw material sublimed sulphur is easily sublimed at a high temperature to cause a quartz tube rupture is avoided. The operation steps are simple; the cost is low; the product purity is very high; the equipment requirements are simple; the synthesis period is short; the method is suitable for expanded production; a new way is provided for batch synthesis of the Fe2SSe; the obtained Fe2SSe is blocky-shaped particles; the microstructure is in a two-dimensional layer form; the agglomerate phenomenon is avoided; and the Fe2SSe with the two-dimensional layer structure is beneficial to intercalation and deintercalation of lithium ions in the charging and discharging processes when used as a lithium-ion negative electrode material.

Cathode material is composed of 60-70%(Wt) sulfurization crosslinking PVC, 10-15% binder; 15-30% conduction agent. Preparation method includes following steps: obtaining solution of sodium polysulphide by dissolving mixed anhydrous sodium sulfide and sublimed sulfur in solvent of N,N-dimethylformamide; obtaining solution of PVC by dissolving PVC in solvent of N,N-dimethylformamide; obtaining sulfurization crosslinking PVC by dropping solution of sodium polysulphide to solution of PVC; powder product is obtained after dry. The disclosed cathode material grafts structure of multi sulfur linkage to framework of chain polymer to fix up S-S structure. Features are: no pollution in synthesizing process, high energy density and favorable charging and discharging cycle.

The invention discloses a new electrode modification method. The new electrode modification method comprises the following steps of: firstly carrying out ball grinding on sublimed sulphur and acetylene black or superconductive carbon black in the mass ratio of 7:2, 1:1 or 8:2, and preparing a sulphur carbon composite material after drying; then mixing the sulphur carbon composite material with an acetylene black conductive agent and a binder PVDF (polyvinylidene fluoride) in the mass ratio of 7:2:1 by adopting a wet process, coating the obtained mixture on an aluminium foil, and preparing an electrode after drying; and coating a layer of membrane solution containing 1-5% of perfluorinated sulfonic acid substances on the surface of the electrode, so as to obtain the modified electrode. A lithium sulphur battery assembled by adopting the modified electrode (which is used as the positive electrode) prepared by using the method disclosed by the invention and metal lithium has a relatively good cycling performance and relatively high charging and discharging efficiency, and the efficiency is more than 92% and is far higher than that of a battery with an unmodified electrode.

The invention discloses a temperature-rising method of a sulfur combusting furnace. The temperature-rising method of the sulfur combusting furnace comprises: step 1, starting a fan to feed air into the sulfur combusting furnace; step 2, starting an ignition gun, wherein the ignition gun combusts in the sulfur combusting furnace; step 3, starting a liquid sulfur pump to feed liquid sulfur in a liquid sulfur groove into a spray gun, wherein the spray gun atomizes the liquid sulfur and sprays the liquid sulfur into the sulfur combusting furnace, and atomized sulfur is ignited by the ignition gun and combusted to produce SO2; and step 4, closing the ignition gun, wherein the atomized sulfur can be continuously combusted in the sulfur combusting furnace to produce the SO2, and simultaneously the temperature of the sulfur combusting furnace rises continuously and gradually and does not operate normally until the temperature reaches to 800-1200 DEG C. By means of the temperature-rising method, the SO2 is produced and no sublimed sulfur is produced in the temperature-rising process of the sulfur combusting furnace, and the SO2 is produced immediately once immediate ignition is performed. The production requirement of enterprises is met, considerable diesel for temperature rising of the sulfur combusting furnace is further saved, and the operation is convenient.

The invention discloses a method for preparing titanium carbide two-dimensional nanosheets by a high-temperature vulcanization heat treatment method, which comprises the following steps of S1, puttingsublimed sulfur and titanium sulfur carbon powder into a mortar, and sufficiently grinding at room temperature to sufficiently and uniformly mix, S2, after grinding is finished, pressing the evenly-mixed raw material powder into a wafer in a dry mode, and sealing the wafer in a vacuum quartz tube, S3, placing the quartz tube in a heat treatment furnace to be heated to different temperatures for heat preservation, reducing the temperature to the room temperature after reaction, and acquiring a sulfur powder and titanium carbide mixture material in the quartz tube, and S4, dissolving sulfur powder with carbon disulfide liquid, filtering, and washing with water to obtain the single-phase black titanium carbide material. According to the preparation method, a new simple way is provided for preparation of the titanium carbide two-dimensional nanosheet material, so that production and development of the titanium carbide two-dimensional nanosheet material are promoted, and compared with preparation of the two-dimensional nanosheet material through HF acid etching, the method has the advantages of being free of pollution, capable of achieving batch production easily, low in cost and the like.

The invention provides a method for preparing a copper-indium sulfide optoelectronic thin film by adopting a sulfate system two-step method, and belongs to the technical field of preparation of the optoelectronic thin films for solar cells. The method comprises the following steps: firstly cleaning a stannic oxide conductive glass substrate, then putting C6H5Na3O7.2H2O, CuSO4.5H2O, In2(SO4)3, and Na2S2O3.5H2O into distilled water, and adopting an electrodeposition method to obtain a precursor thin film on the conductive glass substrate; naturally drying, and putting the precursor thin film into a tubular furnace added with hydrazine hydrate, enabling the precursor thin film not to be in contact with the hydrazine hydrate, wherein the hydrazine hydrate is added with sublimed sulfur powder; heating the precursor thin film in the sealed tubular furnace to enable the precursor thin film to be vulcanized, and finally taking out the sample and drying to obtain the copper-indium sulfide optoelectronic thin film. The method does not require a high-vacuum condition, has low requirements on the instrument and equipment, and is low in production cost, high in production efficiency and easy to operate; the obtained copper-indium sulfide optoelectronic thin film is relatively high in continuity and uniformity; and the main phase is the CuInS2 phase, so that the low-cost and large-scale industrial production can be realized.

The invention discloses a process for preparing cadmium sulfide quantum dots by a low temperature two-phase synthesis method. The process is as follows: a cadmium source is dissolved in oleylamine at room temperature, oleic acid is added for dilution to prepare a cadmium solution as an oil phase; the cadmium source is one of cadmium chloride, cadmium sulfate and cadmium nitrate, the volume ratio of oleylamine to oleic acid is 1:4; sublimated sulfur powder is ultrasonically dissolved in dimethyl sulfoxide containing tri-n-octylphosphine at room temperature to prepare a sulfur solution, or a sulfur compound is directly dissolved in the dimethyl sulfoxide containing the tri-n-octylphosphine to prepare a sulfur solution; the sublimated sulfur powder or the sulfur compound is used as a sulfur source, the sulfur compound is thiourea or sodium sulfide, the tri-n-octylphosphine is used as a wrapping agent, the molar ratio of sulfur source to wrapping agent is 2:1; the cadmium solution is mixed with the sulfur solution for reaction for 30 minutes under the condition of water bath at 70 DEG C, and the cadmium sulfide quantum dots are produced in the oil phase. The process has the advantages of wide raw material sources and low reaction temperature, the prepared cadmium sulfide quantum dots are uniform in particle size and narrow in size distribution, the absorption peak position can be adjusted between 396 to 445 nm, and the fluorescence is strong.

The invention discloses an antibacterial false tooth soft lining material which is prepared from gutta-percha in a compounded manner. The antibacterial false tooth soft lining material can be also named as an gutta-percha composite false tooth soft lining material, and is prepared from a rubber matrix, a vulcanizing activator, magnesium oxide, stearic acid, sublimed sulfur, a sulfur-containing accelerant and an anti-aging agent, wherein the rubber matrix consists of gutta-percha and cis-polybutadiene; the gutta-percha accounts for 90% of the rubber matrix in mass percentage. The antibacterial false tooth soft lining material has certain antibacterial property, and particularly has a relatively high inhibition function on candida albicans.

The invention belongs to the technical field of pesticides and particularly relates to a special mite-killing chemical for bees and a use method. According to the technical scheme, the special mite-killing chemical for the bees comprises components in percentage by weight as follows: 15%-25% of sublimed sulfur, 10%-20% of carbolic acid, 5%-15% of trichlorfon, 10%-20% of boric acid, 15%-25% of boric acid, 5%-15% of naphthalene and the balance of coal ash, and the components are mixed to prepare powder. The chemical contains simple components and does not contain chemical drugs that are harmful to a human body, the components are easy to volatilize and decompose and are pollution-free for bee products, and the chemical is volatilized quickly, is safe and harmless for the bees and has high mite-killing efficiency.

The invention discloses a large-scale preparation method of single-phase NiS2 powder. The preparation method comprises the steps of 1) mixing metal nickel powder and sublimed sulfur powder in proportion; 2) performing high-temperature solid-phase synthesis heat treatment on the mixed powder in a protective gas atmosphere; 3) carrying out grinding, sieving and phase characterization on the synthesized powder, if a phase characterization result shows that sulfur is insufficient, supplementing sublimed sulfur powder for mixing, and carrying out high-temperature solid-phase synthesis again according to the condition in the step (2) until metal nickel is completely synthesized into a NiS2 phase; and 4) performing differential thermal analysis on the NiS2 powder synthesized in the step 3), if the differential thermal analysis shows that the mass percentage content of elemental sulfur is higher than 0.2%, removing redundant elemental sulfur through high-temperature heat treatment until the mass percentage content of elemental sulfur is lower than 0.2%. The process is simple, large-scale production can be achieved, the obtained NiS2 powder is high in purity, high in conductivity and uniform in particle size, and a foundation is laid for obtaining high-power thermal batteries.

The invention discloses a synthesis method of a thioamide compound, which comprises the following steps: under the protection of inert gas, by taking a halide as a substrate, sublimed sulfur as a sulfur source, a copper group metal complex formed by combining copper group metal salt and a ligand as a catalyst, alkali as an accelerant, formamide as a solvent and an amine source, reacting at room temperature to 60 DEG C to obtain the thioamide compound; stirring and reacting the abovef materials for 8-12 hours, and carrying out post-treatment on the reaction product to obtain the thioamide compound. According to the invention, the thioamide compound is synthesized by a three-component one-pot method of halide, sublimed sulfur and formamide; the method has the advantages of mild and safe operation conditions, short reaction time, simplicity and convenience in operation, high product yield and the like.