16 results about "Cadmium chloride" patented technology

The invention belongs to the technical field of photocatalytic hydrogen evolution, and discloses preparation and application of a platinum monatomic modified zinc cadmium sulfide catalyst. Aiming at the urgent demand of clean energy under energy crisis and the problems of insufficient efficiency, complex preparation, high cost and the like of the existing photocatalytic hydrogen evolution material, the invention aims to provide a catalyst which is simple and convenient in process, controllable in cost and excellent in hydrogen evolution performance. According to the preparation method, zinc acetate, cadmium chloride, thiourea, polyvinylpyrrolidone, potassium tetrachloroplatinate and a hydrazine hydrate solution are taken as raw materials, and precise modification and stable loading of platinum single atoms on the surface of zinc cadmium sulfide are realized through combination of a hydrothermal synthesis method and a photodeposition technology. The catalyst shows excellent catalytic activity and long-term stability in the field of photocatalytic hydrogen evolution, the hydrogen evolution efficiency can be remarkably improved, an efficient solution is provided for clean energy development, and the application value is wide.

The invention belongs to the technical field of electrocatalytic materials, and particularly relates to an electrocatalyst with a saturated coordination zinc diatom structure, a preparation method and application. Based on the principle that the boiling point of zinc chloride is lower than that of cadmium chloride and the boiling point of elemental cadmium is lower than that of elemental zinc, ZIF-8 serves as a precursor and is heated together with cadmium chloride, Zn in ZIF-8 can be volatilized at high temperature, Zn in ZIF-8 is replaced by cadmium chloride in the high-temperature process, cadmium (II) is reduced into elemental cadmium (Cd) steam by carbon generated by pyrolysis, and the elemental cadmium (Cd) steam leaves a reaction system; and finally, the catalyst (Zn DACs / N-C) with an excellent ORR performance and a zinc diatom structure is synthesized, and is expected to become a catalyst in fuel cell cathode reaction, automobile exhaust removal and organic reaction.

The invention relates to the technical field of chemical component detection, and particularly discloses fluorescent test paper, a fluorescence analysis method and a fluorescence analysis device for visual online detection of soil nitrate nitrogen. According to the test paper, nitrate nitrogen is reduced into nitrite nitrogen by adopting zinc powder and a cadmium chloride solution, and then the nitrite nitrogen is dropwise added to fluorescent test paper prepared by soaking a mixed solution of para aminobenzoic acid, N-phenyl-1-naphthylamine and hydrochloric acid; under an acidic condition, nitrite nitrogen and para aminobenzoic acid generate diazonium salt, and then the diazonium salt reacts with N-phenyl-1-naphthylamine to form an azo compound, so that the original blue fluorescence on the test paper is gradually weakened along with the increase of the concentration of the nitrate nitrogen. According to the method, high-sensitivity and specific recognition of nitrate nitrogen is realized. And in combination with color identification and data analysis software of a smart phone, a portable and low-cost field detection system is constructed, and an efficient and practical new technical means is provided for visual quantitative detection of soil nitrate nitrogen.

The invention discloses a preparation method of a metal-organic hybrid glass heterojunction with ultra-long phosphorescence and application of the metal-organic hybrid glass heterojunction in information encryption. According to the method, 1-carboxymethyl-3-methylimidazolium chloride and cadmium chloride are subjected to self-assembly to synthesize a novel metal-organic hybrid material, and then crystalline state-liquid-glass multiphase transformation is carried out. The obtained metal-organic hybrid glass shows multi-amorphous property, and provides possibility for changing local order degree and heterogeneity. Further, the prepared metal-organic hybrid glass heterojunction material with ultra-long phosphorescence can be shaped under a heating condition, and a multi-color block heterojunction is realized in single large-size glass. According to the invention, the multi-amorphous transformation of the metal-organic hybrid glass is displayed, the visible and controllable multicolor heterojunction material is developed by using the arbitrary processability of the glass, and the method has wide application in the fields of optical information encryption and the like.

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 invention discloses a cadmium telluride thin film battery cadmium chloride spraying monitoring and control system and method. The system comprises a material preparation module used for preparing and storing a cadmium chloride solution containing a cadmium ion fluorescent probe; the spraying module is used for uniformly spraying the solution containing the probe to the surface of the cadmium telluride substrate to form a liquid film; the on-line detection module is used for collecting a liquid film fluorescence image through an optical detection unit and measuring the conductivity of the liquid film in a non-contact manner through a conductivity detection unit; and the data processing and control module is used for carrying out fusion analysis on the fluorescence image and the conductivity data, calculating the coverage rate, the uniformity and the cadmium chloride content of the liquid film in real time, and dynamically adjusting spraying parameters and probe injection parameters according to an analysis result, so as to realize closed-loop accurate control of the coating process. The problems that in the prior art, real-time performance is poor, blind areas exist in microcosmic distribution detection, and control precision is insufficient are effectively solved, and the consistency of the coating technology and the material utilization rate are improved.

The invention relates to the technical field of photocatalysts, in particular to a Cu-CdS-NRs photocatalyst as well as a preparation method and application thereof. A preparation method of a Cu-CdS-NRs photocatalyst comprises the following steps: S1, mixing and stirring cadmium chloride, water, copper nitrate and sodium diethyldithiocarbamate according to a certain ratio, standing, collecting white precipitate, washing and drying to obtain a brown precursor; s2, the precursor is dissolved in ethylenediamine for a hydrothermal reaction, centrifugal washing and drying are carried out, and the Cu-CdS-NRs photocatalyst is obtained. The Cu-CdS-NRs photocatalyst is used for selectively reducing and substituting nitrobenzene through photocatalysis, has high catalytic efficiency and has high selectivity on a corresponding product.

The invention discloses an rGO / CdS / MIL-101 (Fe) catalyst as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The ternary heterojunction catalyst is prepared by adopting a two-step method: firstly, mixing ferric trichloride hexahydrate, terephthalic acid and reduced graphene oxide in N, N-dimethylformamide, and synthesizing rGO / MIL-101 (Fe) through solvothermal reaction; and dispersing the rGO / CdS / MIL-101 (Fe) catalyst in a cadmium chloride ethanol solution, adding sodium sulfide, and stirring for reaction to obtain the rGO / CdS / MIL-101 (Fe) catalyst. The degradation rate of the catalyst under the conditions of 0.3 g / L dosage and 30 mg / L antibiotic concentration after visible light irradiation for 30 min reaches 92.66%, the degradation rate is still kept to be close to 80% after circulation for 4 times, and the main active species are holes.

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.

The invention relates to preparation and application of a zinc oxide and cadmium sulfide heterojunction modified by a platinum single atom in the field of photocatalytic hydrogen evolution. The invention aims to provide the heterojunction which is simple and convenient in preparation process and low in cost and has efficient photocatalytic hydrogen evolution performance, so that the photocatalytic hydrogen evolution efficiency is improved, and the urgent demand on clean energy under the current energy crisis is relieved. According to the preparation method, zinc acetate, cadmium chloride, thiourea, polyvinylpyrrolidone, potassium tetrachloroplatinate and sodium borohydride are taken as raw materials, a hydrothermal synthesis method is combined with a photodeposition technology, and the prepared platinum single atom modified zinc oxide and cadmium sulfide heterojunction can be applied to the field of photocatalytic hydrogen evolution and has relatively high catalytic activity and stability.

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%.

The application discloses an infrared narrow-band photoelectric device and a preparation method thereof, and comprises the following steps: after an electron transport layer is prepared on FTO glass, an active absorption layer is prepared on the electron transport layer, the active absorption layer is treated by cadmium chloride to passivate defects, a cuprous thiocyanate layer or a nickel oxide layer is prepared on the active absorption layer as a hole transport layer, when the hole transport layer is the nickel oxide layer, a cuprous thiocyanate layer is prepared on the hole transport layer, copper is diffused to the FTO glass interface by annealing the cuprous thiocyanate layer at 250±5 DEG C for 10-30 min, and a transparent electrode is prepared on the surface of the cuprous thiocyanate layer. After the cuprous thiocyanate layer is prepared, high-temperature annealing treatment is carried out, copper is fully diffused and doped into the active absorption layer, the P-type doping concentration is improved, an extremely narrow built-in electric field is obtained, the carrier collection is narrowed, and the infrared narrow-band photoelectric device has the advantages of high stability, long service life, fast response speed, high responsivity, strong waveband selectivity, wide and adjustable response waveband, narrow half-height width and the like.

The application discloses a terbium-doped cesium cadmium chloride microcrystalline powder and a preparation method thereof. 1‑x Tb x Cl3, wherein x=0.05-0.30. The application relates to the technical field of metal powder material preparation, and has the beneficial effect that the crystallinity of the powder is effectively improved, the particle agglomeration is significantly reduced, and the microcrystalline powder with irregular morphology is obtained through mechanical grinding, the chlorine elements provided by pyridine chloride and hydrochloric acid, the dispersion effect of polyethylene, and slow cooling treatment.

The invention relates to preparation and application of an oxygen-vacancy-rich zinc oxide and cadmium sulfide II-type heterojunction catalyst in the field of photocatalytic hydrogen evolution. The invention aims to provide the II-type heterojunction catalyst which is simple and convenient in preparation process and low in cost and has efficient photocatalytic hydrogen evolution performance, so that the photocatalytic hydrogen evolution efficiency is improved, and the urgent demand on clean energy under the current energy crisis is relieved. According to the adopted method, zinc acetate, cadmium chloride, thiourea, polyvinylpyrrolidone and sodium borohydride are jointly used as raw materials, a hydrothermal synthesis method is adopted, and the prepared oxygen-vacancy-enriched zinc oxide and cadmium sulfide II-type heterojunction catalyst can be suitable for the field of photocatalytic hydrogen evolution and has high catalytic activity and stability.

The invention provides an anaerobic ammonium oxidation bacteria efficient sustainable denitrification method, which comprises the following steps: inoculating a biological hybridization system constructed by anaerobic ammonium oxidation bacteria and cadmium sulfide in an anaerobic ammonium oxidation reactor, adding nitrate-containing wastewater and a sacrificial agent, and applying light for treatment. The cadmium sulfide is prepared by reacting cadmium chloride with thioacetamide in polyethylene glycol, and the cadmium sulfide and anaerobic ammonium oxidation bacteria liquid are mixed and incubated to form a hybrid system. According to the method, photo-induced electrons of cadmium sulfide are used for driving anaerobic ammonium oxidation bacteria, nitrate generated by metabolism of the anaerobic ammonium oxidation bacteria is converted into nitrite and ammonium through a way of reducing dissimilatory nitrate into ammonium, and then the nitrite and the ammonium are converted into nitrogen through an anaerobic ammonium oxidation way, so that conversion and deep removal of the nitrate are realized in the system. The nitrogen removal rate limit of 89% of a traditional process is broken through, the total nitrogen removal rate can reach 98% or above, no organic carbon source is needed, no greenhouse gas nitrous oxide is discharged, solar driving is utilized, and the process is clean, efficient and sustainable.

The invention relates to preparation and application of a cadmium vacancy regulated zinc cadmium sulfide catalyst in the field of photocatalytic hydrogen evolution. The invention aims to provide the cadmium vacancy regulated zinc cadmium sulfide catalyst which is simple and convenient in preparation process and low in cost and has efficient photocatalytic hydrogen evolution performance, so that the photocatalytic hydrogen evolution efficiency is improved, and the urgent demand on clean energy under the current energy crisis is relieved. According to the method, zinc acetate, cadmium chloride, thiourea, polyvinylpyrrolidone and a hydrazine hydrate solution serve as raw materials, a one-step hydrothermal synthesis method is adopted, and the cadmium vacancy regulated zinc cadmium sulfide catalyst is prepared, can be suitable for the field of photocatalytic hydrogen evolution and has high catalytic activity and stability.