3 results about "Tin selenide" patented technology

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 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.