5 results about "Cadmium chloride" patented technology

The application relates to the field of water quality detection, in particular to a paper-based nitrate ion detection chip and a preparation method and application thereof. The paper-based nitrate ion detection chip comprises a bottom plate and a paper-based layer on the bottom plate; the paper-based layer comprises a color developing area, a reduction area and a sample inlet area which are sequentially communicated; a detection reagent is pre-fixed in the color developing area, the detection reagent comprises glucose, p-aminobenzenesulfonic acid, N-1-naphthyl ethylenediamine and ascorbic acid; a reduction reagent is pre-fixed in the reduction area, the reduction reagent comprises zinc powder and cadmium chloride; the detection reagent solution is added to the color developing area and then freeze-dried, so that the detection reagent is pre-fixed in the color developing area. The freeze-drying technology is used to uniformly pre-fix the detection reagent on the filter paper, a loose structure is formed, the color developing uniformity of the detection reagent after reacting with nitrate ions can be effectively improved, and the reaction time is reduced.

The application provides an aluminum cluster-based metal organic framework material, a preparation method and application. The material is prepared by a solvothermal reaction with aluminum isopropoxide and cadmium chloride as metal sources and isonicotinic acid as an organic ligand, and has a chemical formula of {Al2CdCl[(CH2O)2]3INA·DMF·0.5H2O} n , has a three-dimensional framework and one-dimensional channels, a BET specific surface area of 332.9 m 2 ·g ‑1 , a minimum pore size of 0.59 nm, a porosity of 41.7%, an adsorption capacity of propylene of 38.5 cm 3 ·g ‑1 at 298 K and 5 kPa, and an adsorption selectivity of 2.5 times for ethylene. The adsorption selectivity of the material for a propylene / ethylene mixed system is not less than 4.0. The application has the advantages of mild process, simple operation, easy availability of raw materials, excellent adsorption selectivity performance of the product, and application in ethylene / propylene adsorption separation and olefin purification, and solves the problems of high energy consumption and complex process in traditional separation.

This invention provides an activation solution for activating cadmium telluride thin films and its application in the preparation of cadmium telluride thin-film solar cells. The activation solution uses tellurium tetrachloride and cadmium perchlorate hydrate as additives added to an aqueous solution of cadmium chloride. Tellurium tetrachloride generates tellurium dioxide and further tellsurium, which remains on the surface of the cadmium telluride, forming a tellurium-rich layer. Cadmium perchlorate or its hydrate acts as a dispersant, preventing the aggregation of tellurium dioxide and tellurium generated by tellurium tetrachloride, thus promoting the formation of a uniform tellurium-rich layer. Furthermore, cadmium perchlorate hydrate can decompose into cadmium chloride, which can also be used as an activation material. When this activation solution is used in the preparation of cadmium telluride thin-film solar cells, no residual chlorine atoms are detected in the activated cadmium telluride film, and acid etching is unnecessary. A tellurium-rich layer is formed on the crystal surface, and the resulting cadmium telluride solar cell chip achieves a power generation efficiency of 18.5%.