12 results about "Thiocyanate ion" patented technology

The invention relates to a color developing solution for detecting iron metal foreign matters in a lithium battery production process and a detection method, and the color developing solution comprises the following components in parts by volume: 3-4 parts of an acid solution, 1-2 parts of an oxidizing agent and 3-4 parts of a thiocyanate solution. The color developing solution is provided for detection of the iron metal foreign matter in the lithium battery production process, the iron metal foreign matter in the lithium battery production process is rapidly and qualitatively detected by utilizing a color developing reaction of ferric ions and thiocyanate ions to generate a blood red complex iron thiocyanate, and the detection sensitivity, the detection efficiency and the speed are high; the reagent of the color developing solution is nontoxic and harmless, the cost is low, the color developing solution is particularly suitable for large-batch detection on a mass production line, the detection efficiency of the production line is greatly improved, and meanwhile, high detection sensitivity is taken into account.

The invention discloses a method for separating rhenium from a rhenium-rich solution containing molybdenum and tungsten. The method comprises the following steps: extracting a rhenium-rich raw material solution containing ReO4 <-> and impurity ions by using an extraction agent containing hydrophobic ionic liquid to obtain an organic extraction phase containing ReO4 <-> and a raffinate phase containing the impurity ions; wherein the solvent of the raw material solution is water, and the impurity ions comprise one or two of MoO4 < 2-> and WO4 < 2->; the hydrophobic ionic liquid is composed of positive ions and negative ions, the anions are selected from one or more of halide ions, borate anions, carboxylate anions, carbonate anions, nitrate ions, nitrite ions, sulfate anions, sulfite anions, sulfonate anions, phosphate anions, phosphite anions, thiocyanate anions and amino acid ions. The method is high in separation efficiency, simple in technological process, easy to amplify, small in extraction agent loss, capable of being recycled and suitable for industrial production.

The present application relates to a kind of hypochlorite detection probe based on pyridine salt and preparation method thereof.The fluorescence probe structure is as shown in formula I.The fluorescent molecular probe of the present application is prepared from o-alkynyl aldehyde as raw material, by condensation reaction with pyridine salt.The probe synthesis method is simple, and the reaction condition is mild, and the yield of target compound is high.The fluorescent molecular probe described in the present application has stable optical performance, high sensitivity for hypochlorite detection, low detection lower limit, detection limit is 0.38 μM, response range is 5-200 μM.It has good selectivity, and has no response to fluoride ion, iodine ion, perchlorate ion, bisulfate ion, sulfate ion, acetate ion, thiocyanate ion, sulfur ion, etc.The fluorescent molecular probe described in the present application has practical application value in the field of biochemistry and environmental chemistry, especially the detection of hypochlorite ion in water, etc.

One aspect of the present disclosure relates to novel cerium complexes comprising cerium (III) ions and exhibiting strong blue emission.SOLUTION: A cerium complex comprising a cerium (III) ion, a thiocyanate ion, and a coordinating compound that interacts with the cerium (III) ion. The coordination compound is the first compound, the second compound, or a combination of these compounds. The first compound is a base softer than triphenylphosphine oxide in the HSAB rule. The second compound is a base harder than triphenylphosphine oxide in the HSAB rule and has a substituent that suppresses an interaction between the second compound and a cerium (III) ion.SELECTED DRAWING: None

This invention relates to the field of optoelectronic functional materials and devices, providing a method for preparing a perovskite photoactive layer based on the confined directional growth of 2D perovskite, a solar cell, and a preparation method thereof. The method involves adjusting the grain size of the perovskite substrate using formamidinium formate and creating gaps at the grain boundaries; initial passivation using lead thiocyanate, during which thiocyanate ions are released and lead iodide is formed at the grain boundaries; and post-treatment using guanidino-iodine, which reacts with lead iodide at the grain boundaries, achieving the confined directional growth of 2D perovskite. This invention, based on the creation of grain boundary gaps through dual doping and the initial passivation with lead iodide, effectively improves the film quality through guanidino-iodine post-treatment, while simultaneously increasing the photoelectric conversion efficiency and fill factor of the device, resulting in highly efficient and stable perovskite single-junction solar cells and perovskite / organic tandem solar cells.

This invention discloses a method for the separation and resource recovery of thiocyanate ions from industrial wastewater, belonging to the field of industrial wastewater treatment and resource recovery technology. The invention first pre-treats industrial wastewater containing thiocyanate ions to remove particulate matter; then, it introduces the wastewater into an electrodialysis system to separate thiocyanate ions from organic matter and other salt ions; next, it undergoes concentration treatment to obtain a highly concentrated thiocyanate ion concentrate, which is then reused in the production stage after ultrafiltration / UV disinfection; or it can be cooled and crystallized to obtain thiocyanate products. This invention solves the problem of separating and recovering thiocyanate ions from industrial wastewater containing thiocyanate ions, achieving a thiocyanate ion separation and recovery rate of over 90%, a concentration efficiency of 10-40%, and yielding industrial-grade pure products. This invention achieves full resource utilization of solid thiocyanate compounds, with zero pollution emissions throughout the entire process, promoting near-zero discharge of industrial wastewater containing thiocyanate ions.

The present disclosure relates to aqueous oral care solutions, kits comprising such solutions, methods of making such solutions, methods of using such solutions (e.g., methods of providing fluoride to a tooth surface of a patient), and tooth surfaces having a coating derived from an aqueous oral care solution, wherein the oral care solution comprises: silver cations; thiocyanate anions provided by a source of thiocyanate, the source of thiocyanate comprising Ca(SCN)2; fluoride anions; and water; wherein the molar ratio of silver ions to thiocyanate ions is at most 0.40:1, and the water is at most 57 wt.%, based on the total weight of the solution.

The invention relates to the technical field of solar cells, and discloses a perovskite cell and a preparation method thereof, and a photovoltaic module, and the preparation method comprises the steps: preparing a shape-maintaining lead iodide skeleton layer with a pore structure and a thickness of 400-450 nm on a substrate with a suede structure; coating a cation solution with an additive AB on the lead iodide skeleton layer, and annealing under the air humidity of 50-80% to obtain a perovskite layer; a comprises at least one of rubidium ions and methylamino, and B comprises at least one of chloride ions and thiocyanate ions; the mass concentration of iodoformamidine in the positive ion solution is 7 mg / mL to 14 mg / mL, the mass concentration of bromo formamidine in the positive ion solution is 35 mg / mL to 42 mg / mL, the mass concentration of bromo formamidine in the positive ion solution is 20 mg / mL to 26 mg / mL, and the mass concentration of bromo methylamine in the positive ion solution is 4 mg / mL to 7 mg / mL; and performing post-treatment to obtain the perovskite battery. And the perovskite layer has a relatively high suede structure and is high in crystallization quality and good in stability.

The invention discloses an automatic analysis method for sulfur-containing ions in a desulfurization solution, which comprises the following steps: S1, using a silver-carrying composite electrode as an indicator electrode, and configuring an automatic potentiometric titrator of the silver-carrying composite electrode; s2, setting titration parameters of an automatic potentiometric titrator; s3, sucking the desulfurization solution into a titration cup of an automatic potentiometric titrator, adding ultrapure water for dilution, and then adding nitric acid to adjust the solution to be weakly acidic; and S4, titrating by adopting the titration parameters set in the step S2, determining a titration end point according to the potential jump condition of the indicator electrode, and obtaining the content of thiocyanate ions and sulfur ions in the desulfurization solution according to a potentiometric titration curve. According to the method, an automatic potentiometric titrator is adopted, the silver-containing composite electrode is used as the indicator electrode, titration is performed by using a silver content method, and the titration end point is determined according to the potential jump condition of the indicator electrode, so that the analysis speed is accelerated, and accurate determination of the sulfur-containing ions in the desulfurization solution is realized.

The application discloses a method for improving electrochemical carbon dioxide reduction to produce methane under acidic conditions of a copper-based catalyst by using potassium thiocyanate. The method adds potassium thiocyanate into an electrolyte for electrochemical carbon dioxide reduction under acidic conditions of a copper-based catalyst, or simultaneously adds a potassium ion-containing salt and a thiocyanate ion-containing salt, and the existing potassium thiocyanate salt in the electrolyte can effectively regulate the electronic structure of a Cu surface, promote deep hydrogenation of an intermediate in a carbon dioxide reduction reaction, thereby improving the selectivity of methane synthesis, and meeting the needs of industrialized carbon dioxide electro-reduction to produce methane.

The present invention provides a water treatment device that can stably treat COD components while suppressing the generation of nitrite to a low level. [Solution] A water treatment apparatus comprising a biological treatment tank containing activated sludge containing bacteria capable of decomposing COD components, and into which water to be treated containing ammonia and thiocyanate ions is introduced. This water treatment apparatus comprises an aeration device that performs aeration in the biological treatment tank, and a measuring unit that measures at least one concentration value selected from the group consisting of ammonium concentration, nitrite concentration, and nitrate concentration in the treated water obtained by treating the water to be treated in the biological treatment tank. Furthermore, this water treatment apparatus comprises a control unit that adjusts the aeration airflow rate based on the difference between the ammonium concentration in the water to be treated and the ammonium concentration in the treated water measured by the measuring unit, and at least one index value selected from the group consisting of nitrite concentration, nitrate concentration, and the sum of nitrite concentration and nitrate concentration in the treated water measured by the measuring unit.

The present invention relates to a method for separating, recovering and resource-recycling a variety of valuable substances from pharmaceutical wastewater, using an integrated technology based on electrodialysis to separate and recover thiocyanate ions, chloride ions and acetate ions from pharmaceutical wastewater. The method of the present invention is characterized in that the pharmaceutical wastewater is first pretreated with the aid of a polyacrylonitrile composite nanofiber membrane to remove large particulate matter in the wastewater; the treated wastewater is introduced into an electrodialysis system to separate salts from organic matter in the wastewater; the separated fresh water is introduced into a biological system for biological treatment, and the concentrated water is introduced into an electrodialysis concentration system; the concentrated water after preliminary concentration is introduced into an RO reverse osmosis system for high-multiple concentration, thereby achieving high-multiple concentration and separation and recovery of multi-component salts. The method of the present invention solves the difficult problem of separating and recovering valuable salt molecules in pharmaceutical wastewater, realizes full resource utilization of salts, and the entire process is pollution-free, promoting zero discharge of industrial wastewater.