7 results about "Tin selenide" patented technology

The invention discloses a carbon nanotube coated tin selenide composite negative electrode material as well as a preparation method and application thereof, and belongs to the technical field of lithium ion battery negative electrode material preparation. The preparation method comprises the following steps: firstly, weighing a mixture of selenium powder, tin powder and tin tetraiodide and a multi-walled carbon nanotube according to a certain proportion, separately placing the materials in two areas of a quartz tube, vacuumizing and sealing the quartz tube, and then heating the material in double temperature areas under a certain condition to obtain the carbon nanotube coated tin selenide composite negative electrode material. In an electrode made of the composite material, the tin selenide nanowires are uniformly filled in the multi-walled carbon nanotubes. The multi-walled carbon nanotubes can be used as a firm volume expansion buffer layer and a conductive enhancement layer, and the composite material shows excellent long cycle stability and excellent rate capability when being used as a lithium ion battery negative electrode.

The application provides a thermoelectric material, a preparation method thereof and a thermoelectric device, and the chemical formula of the thermoelectric material is Sn (1‑x‑y) Cu x La y Se, wherein 0<=x<=0.2 and 0 The thermoelectric material provided by the application is doped with lanthanum (La) and / or copper (Cu) to effectively control the polycrystalline tin selenide lattice arrangement and macroscopically, so that the thermoelectric material has high hole carrier concentration and dense crystal defects, thereby improving the ZT value of the thermoelectric material Sn (1‑x‑y) Cu x La y Se, and further improving the thermoelectric conversion efficiency of the thermoelectric material. Meanwhile, the thermoelectric material has a wide temperature range, can effectively utilize heat energy exceeding 200 DEG C, and has good application prospect.

This application discloses a method for preparing and applying a tin selenide-supported ferruginous zeolite catalyst, belonging to the field of catalytic chemistry. The preparation method includes: pre-crystallizing a mixed solution containing a silicon source, an aluminum source, a template agent, and water to obtain a silica-alumina gel; under stirring conditions, slowly adding a mixed solution containing a tin source, a selenium source, and ethanol sequentially, and then slowly adding an alkali to the silica-alumina gel to obtain a mixed gel; placing the mixed gel in a sealed container for hydrothermal crystallization; washing and drying the hydrothermally crystallized product, followed by calcination, to obtain the tin selenide-supported ferruginous zeolite catalyst. This application, by modifying silica-alumina molecular sieves with tin selenide, enables one-step ethanol production using hydrogen and carbon dioxide as raw materials in a fixed-bed reactor. Furthermore, the selectivity of ethanol can be adjusted by modifying the catalyst preparation process.

The invention relates to the technical field of lasers, in particular to an electro-absorption modulated laser which comprises a substrate and an epitaxial layer, the epitaxial layer sequentially comprises a buffer layer, a bottom DBR layer, a lower limiting layer, an active area, an upper limiting layer and an insulation limiting layer from bottom to top, and the insulation limiting layer is made of tin selenium. A limiting hole used for laser output is etched in the insulation limiting layer. According to the application, oxidation limitation, structure optimization and process innovation are replaced by topological limitation, a traditional VCSEL, an EAM-VCSEL, a silicon light scheme and an electro-absorption modulated laser (EML) are comprehensively surpassed in core dimensions such as performance, reliability, integration level and power consumption, the scheme is particularly adapted to the requirements of 1.6 T / 3.2 T high density, low power consumption and wide temperature range of an AI data center, meanwhile, the scheme is compatible with an access network 1310 nm wave band, and the application range is wide. The method is a full-scene laser communication scheme capable of covering short-distance interconnection and middle-distance transmission.

The application relates to a method for photocatalytic reduction of Cr(VI) based on an organic hybrid indium tin selenide (Bmmim)8In8Sn8Se 30 (Se4)2 as a catalyst for photocatalytic reduction of Cr(VI), belonging to the technical field of photocatalysis and heavy metal ion wastewater treatment. The application uses organic hybrid indium tin selenide (Bmmim)8In8Sn8Se 30 (Se4)2 as a catalyst for photocatalysis. The material exhibits high photocatalytic activity in an acidic environment with pH=3, reduces Cr(VI) in wastewater into Cr(III), and has good reusability and cycle stability. Compared with other catalysts, the reduction rate is 26.3, 10.8 and 7.1 times that of P25, In2Se3 and SnSe2 respectively. Under sunlight irradiation, the material also shows good photocatalytic performance for Cr(VI) reduction.

The application discloses a doped copper-selenium tin thermoelectric catalyst and a preparation method and application thereof, and belongs to the technical field of environment-friendly thermoelectric materials. ‑ A tetravalent selenium source is taken into a solvent I, stirred uniformly to obtain a solution I; a divalent tin source, an OH ‑ source, a divalent copper source are sequentially added into a solvent II, continuously stirred during the adding process, stirred uniformly to obtain a solution II, the solution I and the solution II are mixed, a reducing agent is added after uniform stirring, and a hydrothermal reaction is carried out; after the reaction is completed, the remaining solid is obtained by removing the liquid, and the obtained solid is cleaned and dried to obtain the doped copper-selenium tin thermoelectric catalyst. The application uses low-content copper-doped selenium tin nanomaterial as a thermoelectric catalyst to treat organic pollutants in wastewater, the preparation process of the nanomaterial is simple, safety is good, cost is low, raw materials are widely sourced, the nanomaterial has good thermoelectric performance and catalytic performance, and can be applied to the field of environmental protection.

This invention relates to a sodium-ion battery anode material, its preparation method, and its application. It addresses the technical problems of poor cycle stability and low rate capability of existing selenide electrodes. The sodium-ion battery anode material of this invention is a self-supporting cobalt-tin selenide nanowire array with a heterogeneous structure grown on carbon cloth. Preparation method: Cobalt source, tin source, alkali source, and additives are added to a solvent, mixed evenly, and then transferred to a reaction vessel. Pretreated carbon cloth is then vertically placed in the mixture. After a solvothermal reaction, selenization is performed in a tube furnace to obtain the anode material. This material exhibits excellent sodium storage characteristics at a current density of 0.1 Ag. ‑1 After 100 cycles at the current density, the capacity remained at 885.4 mAh g. ‑1 It boasts a capacity retention rate of up to 98.6%, and its manufacturing process is simple, with readily available raw materials and low cost, making it suitable for use in the sodium-ion battery field.