11 results about "Silicon disulfide" patented technology

The invention provides a preparation method of high-purity lithium sulfide, which comprises the following steps: (1) under the protection of inert atmosphere, mixing and dispersing silicon sulfide and lithium fluoride, transferring into a reactor, heating the material in the reactor to a certain temperature under the inert atmosphere, and keeping the temperature for a certain time for reaction to obtain a lithium sulfide crude product and silicon fluoride gas; and (2) dissolving the lithium sulfide crude product in an organic solvent, filtering to remove insoluble impurities, concentrating, and drying to obtain the high-purity lithium sulfide. The preparation method is simple and efficient, and the prepared lithium sulfide is high in purity.

The application discloses a quasi-solid-state sodium battery electrolyte and a preparation method and application thereof, and belongs to the technical field of sodium metal batteries. The quasi-solid-state sodium battery electrolyte provided by the application comprises a photocuring agent, a sodium ion electrolyte and a two-dimensional material; the two-dimensional material comprises one or more of fluorinated graphene, titanium nitride, boron nitride, silicon disulfide, tungsten disulfide and silicon carbide. The quasi-solid-state sodium battery electrolyte provided by the application has good mechanical strength and mechanical stability, can reduce the resistance of the quasi-solid-state sodium battery electrolyte, and improve the ionic conductivity; when the quasi-solid-state sodium battery electrolyte is applied to a sodium metal battery, the sodium metal battery has higher specific capacity under small and large rates, and can maintain long-time cycle stability.

The invention discloses a preparation method of a single-layer molybdenum disulfide catalyst, the prepared catalyst and application. Comprising the following steps: mixing silicon disulfide, water, a surfactant, ammonium sulfide and a molybdenum precursor, regulating the pH value to 1-2 by using a pH regulator, reacting, adding hydrazine hydrate, refluxing, washing, separating, vacuum drying and roasting to obtain a black solid; and mixing the black solid with a sodium hydroxide solution, stirring, washing, separating, drying, reducing and activating to obtain the single-layer molybdenum disulfide catalyst. The catalytic material shows excellent catalytic activity and 100% carbon monoxide selectivity in a reverse water-gas shift reaction at the temperature of 300-600 DEG C. According to the catalyst synthesis method, stable single-layer molybdenum disulfide preparation under normal pressure can be achieved, the specific surface area is far higher than that of molybdenum disulfide synthesized through a traditional hydrothermal method, the exposure amount of active sites is remarkably increased, and excellent activity and stability are shown in a reverse water-gas shift reaction.

The utility model relates to the technical field of chips, in particular to a waterproof six-channel touch driving chip which comprises a main body, a base is fixedly arranged at the bottom end of the main body, a sealing plate is connected to the top end of the base in a clamped mode, a cavity is formed in the inner wall of the middle of the top end of the sealing plate, a driving block is connected into the cavity in a sliding mode, and a clamping assembly is arranged at the bottom end of the sealing plate. Waterproof assemblies are arranged on the inner walls of the two sides of the sealing plate. By designing a pull rod, a first sliding hole, a sliding disc, a second sliding hole, a first spring, a clamping plate, a clamping groove, a clamping bolt, a sealing ring, a third spring, a pressing rod, a third sliding hole, a waterproof plate, a second spring, a sliding groove and other structures to be matched with one another, when a chip is touched and driven, the waterproof groove is separated from a vulcanized silicone rubber layer, and a driving block moves downwards to drive the chip; when the chip does not need to be touched and driven, the waterproof groove and the vulcanized silicone rubber layer are mutually clamped, and the waterproof performance of the chip can be effectively improved through the two waterproof plates made of polyurethane waterproof materials.

The invention is applicable to the technical field of sewage treatment, and provides a denitrifying sulfur-iron composite filler catalyst and a preparation method thereof, the denitrifying sulfur-iron composite filler catalyst comprises a material A and a material B. The material A is a strain; the material B comprises microporous aggregate, a coating material and a starch layer; the microporous aggregate comprises activated carbon, sponge iron, silicon sulfide and silicon carbide; the coating material comprises a carbon source, a nitrogen source, sulfur powder and iron powder; the mass ratio of the material A to the material B is (1-3): (50-90); preferably, the strain comprises thiobacillus denitrificans, sulfur bacteria and a culture medium, and the content of the thiobacillus denitrificans in the culture medium is (1-5) * 10 < 10 > CFU / ml, and the content of the sulfur bacteria in the culture medium is (0.5-1.5) * 10 < 10 > CFU / ml; the culture medium comprises the following components: 1-2g of ammonium chloride, 2-5g of sodium sulfite, 1-2g of monopotassium phosphate, 0.5-1g of sodium chloride, 0.1-0.2 g of calcium sulfate and 1L of water. The catalyst prepared by the invention is used for sewage treatment, has high denitrification efficiency and certain reusability, and is economical, environment-friendly and low in cost.

A mirror layer for a lithographic apparatus is provided that includes at least one element that forms a chemical bond with silicon, the chemical bond having a bond dissociation energy of at least 447 kJ mol-1. Also provided is a method of manufacturing such a mirror layer, a mirror comprising a mirror layer described herein, and a lithographic apparatus comprising such a mirror layer or mirror. The use of molybdenum silicon sulfide, oxide, selenide or fluoride in a mirror layer or mirror, as well as the use of such a mirror layer or mirror in a lithographic apparatus or method, is also described.

This invention discloses a sulfide solid electrolyte, its preparation method, and a battery, belonging to the field of battery material technology. The preparation of the sulfide solid electrolyte includes: thermally reacting the raw materials for the preparation of the sulfide solid electrolyte; tangentially filtering the material obtained after the thermal reaction; and spray-drying the solid obtained from the tangential flow filtration. The raw materials include a first precursor, a second precursor, and a solvent. The first precursor includes lithium sulfide, and the second precursor includes at least one selected from phosphorus pentasulfide, silicon sulfide, germanium sulfide, tin sulfide, sodium sulfide, potassium sulfide, ammonium sulfide, calcium sulfide, and arsenic sulfide. This method has a relatively simple process flow and operation, low energy consumption and cost, and high production efficiency, making it suitable for industrial production. The sulfide solid electrolyte obtained in this way is relatively soft, making it easier to contact the positive and negative electrodes under extrusion conditions during the further preparation of the battery, improving density, thereby facilitating electron transport and reducing losses.

This invention discloses a method for preparing rare earth sulfides and colorants. The method uses rare earth oxides, molybdenum sulfide, and elemental silicon as raw materials. First, molybdenum sulfide and elemental silicon undergo a high-temperature reaction to generate silicon sulfide gas. Then, the silicon sulfide gas undergoes a reducing sulfidation reaction of the rare earth oxides to generate the corresponding rare earth sulfides. Finally, the reaction product is leached with alkali to remove soluble impurities, followed by filtration, rinsing, and drying to obtain high-purity rare earth sulfides. This process yields rare earth sulfide powder and ultrafine molybdenum silicide powder as a byproduct. Furthermore, the phase and color of the rare earth sulfides can be controlled by doping with alkali metals and alkaline earth metals. This invention is a novel method for synthesizing rare earth sulfide powder. Compared to other methods, it has the following advantages: universal applicability, low raw material cost, safe and controllable reaction process, high purity of reaction products with no solid waste generation, and ease of industrial-scale production.

The present invention provides a β-cesium cadmium silicon sulfide compound, a β-Cs2CdSi4S10 infrared nonlinear optical crystal, as well as their preparation methods and applications. The β-cesium cadmium silicon sulfide compound has a chemical formula β-Cs2CdSi4S10 and a molecular weight of 755.04. The β-Cs2CdSi4S10 infrared nonlinear optical crystal belongs to the tetragonal crystal system, its space group is I-4, and its unit cell parameters are: a=8.4233(7) Å, c=14.6136(12) Å, and the unit cell volume is 1036.86(19) Å3. The present invention adopts a vacuum packaging method to prepare a β-Cs2CdSi4S10 infrared nonlinear optical crystal. By using the kurtz-berry method, it was found that the frequency doubling effect of β-Cs2CdSi4S10 crystal is approximately 1.1-1.2 times that of AgGaS2(AGS). By using the UV-visible diffuse reflection, it was found that the β-Cs2CdSi4S10 crystal has the crystal bandgap of 4.21 eV, the UV cutoff edge of 254 nm, and the infrared transparency range greater than 13 μm. The preparation method of the β-Cs2CdSi4S10 infrared nonlinear optical crystal of the present invention is simple, with a short growth period, and avoids the leakage and contamination of raw materials. The β-Cs2CdSi4S10 infrared nonlinear optical crystal of the present invention can be used to fabricate conversion devices for high-power laser output applications and has important applications in atmospheric remote sensing and communication fields.

The present invention is applicable to the technical field of sewage treatment, and provides a denitrifying sulfur-iron composite packing catalyst and a preparation method thereof, which include material A and material B. Material A is a strain; material B includes a microporous aggregate, a coating material and a starch layer; the microporous aggregate includes activated carbon, sponge iron, silicon sulfide and silicon carbide; the coating material includes a carbon source, a nitrogen source, sulfur powder and iron powder; the mass ratio of material A to material B is (1-3):(50-90); preferably, the strain includes Thiobacillus denitrificans, sulfur bacteria and a culture medium, and the contents of Thiobacillus denitrificans and sulfur bacteria in the culture medium are (1-5)×10<supgt;10< / supgt> CFU / ml and (0.5-1.5)×10<supgt;10< / supgt> CFU / ml; the components and contents of the culture medium are as follows: 1-2 g of ammonium chloride, 2-5 g of sodium sulfite, 1-2 g of potassium dihydrogen phosphate, 0.5-1 g of sodium chloride, 0.1-0.2 g of calcium sulfate, and 1 L of water. The catalyst prepared by the present invention is used for sewage treatment, not only has a high denitrification efficiency, but also has a certain reusability, is economical, environmentally friendly and has a low cost.