38 results about "Cesium ions" patented technology

The invention provides a method and a device for preparing an adsorbent for adsorbing rubidium and cesium from lepidolite leachate. The preparation method of the adsorbent for adsorbing rubidium and cesium from the lepidolite leachate comprises the following steps: S1, weighing straw powder, and carrying out soda boiling treatment on the straw powder; s2, filtering while hot, collecting filter residues, washing with deionized water, and drying; s3, transferring the filter residues into a high-pressure kettle, and adding deionized water for hydrothermal reaction to obtain a reaction product. According to the preparation method and device of the adsorbent for adsorbing rubidium and cesium from the lepidolite leaching solution, the adsorbent has the effects of high adsorption capacity, good selectivity and stability in the aspect of rubidium and cesium adsorption, and the material can adsorb a large number of rubidium and cesium ions due to the rich pore structure and ion exchange sites; and the enrichment capacity on low-concentration rubidium and cesium is improved.

The invention belongs to the technical field of adsorption material preparation, and relates to an anion defect type prussian blue analogue and a preparation method and application thereof in cesium adsorption.The preparation method comprises the steps that imidazole and halogenated alkane are subjected to an alkylation reaction and anion exchange to prepare ionic liquid, and after water is added, an ionic liquid-water mixed solvent is obtained; the method comprises the following steps: respectively dissolving transition metal nitrate and potassium ferrocyanide into an ionic liquid-water mixed solvent, dropwise adding a potassium ferrocyanide solution into a transition metal nitrate solution, and stirring to obtain a mixed solution; and carrying out hydrothermal reaction on the mixed solution, cooling to room temperature, washing the material, and drying to obtain the anion defect type prussian blue analogue. The cesium ion adsorption capacity and the cesium ion cycling stability are improved by precisely regulating and controlling anion defects in the Prussian blue analogue, and the cesium ion adsorption material has good ion interference resistance in a complex water environment and shows excellent adsorption selectivity and a wide application range.

The objective is to provide a method for dissolving solids that is excellent at dissolving solids generated in nuclear facilities. [Solution] A method for dissolving a solid generated at a nuclear facility, comprising dissolving the solid in a solution containing at least one of carbonate ions and bicarbonate ions, and at least one of potassium ions and cesium ions.

The invention belongs to the field of selective adsorbents, and particularly relates to a rubidium and cesium ion selective adsorbent based on a graphene composite material and application thereof.The rubidium and cesium ion selective adsorbent is prepared by conducting surface carboxyl activation and crown ether grafting on the surface of a three-dimensional cross-linked graphene skeleton to obtain a crown ether functionalized graphene composite material; and performing in-situ growth of copper ferrocyanide nanoclusters on the crown ether functionalized graphene composite material. The rubidium cesium ion selective adsorbent realizes efficient selective adsorption of Rb < + > and Cs < + >, reaches adsorption equilibrium within 30 min in simulated high-level liquid waste, has Cs < + > and Rb < + > saturated adsorption capacities of 185 mg / g and 142 mg / g respectively, and has excellent acid-base stability and electrochemical regeneration capacity.

The embodiment of the invention provides a preparation method and application of a nickel potassium ferrocyanide template adsorbent. The method comprises the following steps: providing a cesium ferrocyanide solution; performing first mixing on the cesium ferrocyanide solution and a nickel source to obtain a cesium nickel ferrocyanide precursor; and carrying out second mixing on the cesium nickel ferrocyanide precursor and a potassium salt solution to obtain the potassium nickel ferrocyanide template adsorbent. The potassium nickel ferrocyanide template adsorbent prepared by the method disclosed by the invention has relatively good selective adsorption capacity on cesium ions in a cesium-containing solution, and is particularly suitable for adsorbing Cs < + > in a high-salt solution.

The invention relates to an optical sensor for detecting Caesium ions and / or measuring concentration of the same in a fluid medium, comprising a resonant structure (1), a surface of which is covered by a layer of a macrocyclic compound (2). The invention further relates to a method for covering a surface of a resonant structure (1) of an optical sensor with a layer of a macrocyclic compound (2) such that the optical sensor is capable of detecting Caesium ions and / or measuring concentration of the same in a fluid medium.

The application belongs to the technical field of ion sieve, and discloses an ion sieve for adsorbing cesium ions and a preparation method thereof. 13 Then, the ion sieve for adsorbing cesium is obtained by immersing in an acid solution. The cesium ion sieve prepared by the high-temperature solid-phase method has good ion exchange selectivity for Cs+, high saturated exchange capacity, high crystallinity, pure product and good crystallization effect.

The invention discloses a flame atomic absorption spectrum detection method for potassium element in a specific bulk drug, which comprises the following steps: adding cesium ions as an exclusive ionization inhibitor into a full detection system, optimizing the temperature gradient and pressure threshold of microwave digestion, and unifying the matrix composition of a blank solution, a standard solution and a test solution to realize efficient elimination of interference. An atomic absorption spectrophotometer is adopted for detection under the potassium element characteristic wavelength of 766.5 nm, the correlation coefficient of a standard curve stably reaches 0.999 or above, the relative standard deviation of a detection result is smaller than or equal to 3.0%, the potassium element content in a specific type of raw material medicine can be accurately measured, and the qualified judgment standard is that the potassium content is smaller than or equal to 0.2%. The method is suitable for production quality monitoring and finished product compliance checking of specific bulk drugs, has the advantages of high accuracy, safe operation and strong specificity, can provide a reliable quality control means for pharmaceutical enterprises, and fills the technical blank of high-precision detection of potassium elements in the specific bulk drugs.

The application discloses an SCM-IC-1 molecular sieve composite material and a preparation method and application thereof. The SCM-IC-1 molecular sieve composite material comprises a silicon-aluminum porous crystal component, an ammonium phosphomolybdate component and a silicon-based binder component. The SCM-IC-1 molecular sieve composite material provided by the application can be used as an adsorption material for capturing and detecting metal ions in water bodies, especially for cesium ions, and has the technical effects of high capture rate and fast capture rate.

This invention relates to the field of cesium ion adsorption materials, specifically to an acid-controlled copper-based Prussian blue analogue, its preparation method, and its application. The invention provides a method for preparing an acid-controlled copper-based Prussian blue analogue, comprising: adding potassium ferrocyanide solution to a mixture of polyvinylpyrrolidone and a copper salt solution, followed by stirring and aging to obtain particulate copper-based Prussian blue analogue; adding the particulate copper-based Prussian blue analogue to a mixture of acid and N,N-dimethylformamide, followed by heating to obtain an acid-controlled copper-based Prussian blue analogue. This invention utilizes acid control to induce new structures and more adsorption sites in the copper-based Prussian blue analogue, thereby achieving selective and efficient adsorption of cesium ions in water, significantly reducing the interference of sodium ions on cesium ion adsorption, and making it more stable in solution.

The invention discloses an ytterbium-ion-doped quasi-two-dimensional perovskite near-infrared light-emitting thin film material and a preparation method and application thereof.According to the method, firstly, an ytterbium-ion-doped quasi-two-dimensional perovskite thin film is prepared, and efficient near-infrared quantum cutting emission can be achieved; the introduction of fluorophenylethylamine bromide can further improve the humidity stability of the material. Cesium ions are partially replaced by formamidine ions, the crystal quality of the film is improved, the phase distribution of the quasi-two-dimensional film is adjusted, the defects of a perovskite material are reduced, the energy transfer efficiency from a perovskite host to ytterbium ions is remarkably improved, the film can be applied to the photovoltaic field as a fluorescent layer and a fluorescent conversion layer, and preparation of high-performance photoelectric devices is achieved.

An object of the present invention is to provide a method for manufacturing a solar cell which is improved in manufacturing cost and ease. The present invention relates to a method for producing a solar cell having a photoelectric conversion layer containing a perovskite compound, the method comprising the steps of: + ), rubidium ion (Rb + ), cesium ions (Cs + ) and francium ion (Fr + the perovskite compound is a compound selected from the group consisting of cations of methyl cations, methyl cations of ...

This invention discloses an electrochemical carbon membrane reactor and its operating process for removing cesium ions from water, relating to the field of cesium ion separation. The device mainly includes a functional carbon membrane anode, a functional carbon membrane cathode, a regulated power supply, a water pump, sensors, and a casing. During operation, the cesium-containing solution to be treated is pumped from the raw water tank to port A, entering the anode chamber. It then sequentially penetrates the carbon membrane anode and cathode, reaching the cathode chamber and finally flowing into the product water tank from port B, yielding treated water. This invention utilizes both the electrostatic repulsion of the carbon membrane anode and the electrochemical adsorption of the carbon membrane cathode as core processes to remove cesium ions from water. Furthermore, the device's performance can be restored and regenerated through periodic removal of the concentrate and electrode reversal. This process has the advantages of simple equipment, simple operation steps, low production cost, and high cesium ion removal rate, and can be applied to the effective separation and removal of cesium ions in industrial wastewater, salt lake water, nuclear wastewater, seawater, and other water bodies.

The invention discloses a quinoxaline-5-carboxylic acid coordinated catalyst which has a general formula shown in the specification, b is a sodium ion, a magnesium ion, a calcium ion, an aluminum ion, a rubidium ion, a cesium ion, an ammonium ion, a tetradecyl dimethyl benzyl ammonium ion, a tetradecyl trimethyl ammonium ion, a hexadecyl trimethyl ammonium ion, a hexadecyl dimethyl benzyl ammonium ion, a tributyl octyl phosphonium ion, a tetrapropyl phosphonium ion, a dipropyl dibutyl phosphonium ion and a dibutyl dihexyl phosphonium ion; the phosphonium ions are tetraheptyl phosphonium ions, tetrabutyl phosphonium ions, tetrabenzyl phosphonium ions, tetraheptyl ammonium ions, dimethyl diethylammonium ions, benzyl trihexylammonium ions, tribenzyl phenyl phosphonium ions or tetraphenyl ammonium ions; m is Mo, Cr or W; r is alkyl with 1 to 25 carbon atoms; x is an integer between 1 and 20; and y is an integer between 1 and 40. The catalyst can improve the oxidation reaction selectivity and conversion rate of ortho-nitrotoluene.

The application discloses a Mo-containing molecular sieve and a preparation method and application thereof. n The chemical composition of the Mo-containing molecular sieve is xM2O*ySiO2*xAl2O3*zMoO, and satisfies 0.005<=x / y<=0.2 and 5<=y / z<=80 in terms of moles; n is the total number of oxygen atoms required to satisfy the valence of elements in the molybdenum oxide; and M is selected from Na or K. The molecular sieve has a novel molecular sieve composition and structure, can be used as an adsorption material to capture and detect metal ions in a water body, especially cesium ions, and has the technical effects of high capture rate and fast capture speed.

The invention discloses a COF membrane, a preparation method thereof and application of the COF membrane in cesium-sodium separation. The preparation method of the COF membrane comprises the following steps: preparing carboxyl COF nanosheet water-phase colloid by a three-phase method; activating the carboxyl COF nanosheet water-phase colloid by EDC / NHSs to prepare a crown ether modified COF nanosheet solution; and preparing the crown ether modified COF membrane on the surface of the substrate membrane through vacuum-assisted self-assembly suction filtration. The method has the advantages that the introduction of the crown ether effectively reduces the aperture of the COF to prevent all hydrated ions from passing through, and meanwhile, the crown ether selectively recognizes sodium ions to ensure that the sodium ions pass through a crown ether cavity in a bare ion form and then pass through a membrane while cesium ions are intercepted.

This application belongs to the field of photodetector technology, and relates to composite thin films and their preparation methods, preparation methods of A4BX6 crystals, and photodetectors. The composite thin film includes a first film layer and a second film layer. The material of the first film layer includes ABX3, and the material of the second film layer includes A4BX6; wherein A is selected from at least one of cesium ions, formamidinium ions, methylammonium ions, n-octylammonium ions, phenylethylammonium ions, benzylammonium ions, and tert-butylammonium ions; B is selected from at least one of lead ions and tin ions; and X is selected from at least one of iodide ions, bromide ions, and chloride ions. The composite thin film provided by this application simultaneously possesses high electron transport efficiency and high ultraviolet light sensitivity.

The invention relates to the technical field of preparation of inorganic-organic composite functional materials, and relates to a preparation method of an MFCs-coated E-ZrP composite adsorbent and a separation membrane thereof, and the method comprises the following steps: firstly, carrying out intercalation stripping on alpha-zirconium phosphate by using trihydroxymethyl aminomethane through a colloid assembly intercalation method to prepare a water-based E-ZrP dispersion liquid; then transition metal chloride and potassium ferrocyanide are sequentially introduced into the water-based E-ZrP dispersion liquid, metal ferrocyanide is generated through an in-situ reaction, and the MFCs-coated E-ZrP composite adsorbent is obtained; and blending the composite adsorbent with a high-molecular polymer, and preparing the MFCs-coated E-ZrP composite separation membrane by adopting a non-solvent induced phase separation technology. The composite adsorbent and the separation membrane prepared by the invention have high selective adsorption capacity and excellent structural stability on rubidium and cesium ions, and can be widely applied to the fields of separation and extraction of rubidium and cesium in salt lake brine, underground brine and geothermal water, removal of cesium ions in radioactive wastewater and the like.

The invention belongs to the field of adsorbents, and particularly relates to a rubidium and cesium ion selective adsorbent based on a bio-based porous carbon material and a synthesis method thereof.Biomass raw materials are smashed to be prepared into suspension liquid, the suspension liquid reacts with an activating agent, and a precursor is obtained; performing anaerobic calcination on the precursor to obtain a bio-based porous carbon material; heating the bio-based porous carbon material to 330-335 DEG C in an inert atmosphere, taking out the bio-based porous carbon material, and immediately reacting the bio-based porous carbon material with a cold ethanol water solution to obtain a modified bio-based porous carbon material; and dispersing the modified bio-based porous carbon material in a mixed aqueous solution containing transition metal salt and potassium ferrocyanide for reaction to obtain the rubidium and cesium ion selective adsorbent. The adsorption capacity retention rate of the adsorbent is not lower than 85% after five times of adsorption-desorption cycles in an ultrasonic-assisted desorption environment; after 8 times of adsorption-desorption cycles, the adsorption capacity retention rate is not less than 75%; and the cycle service life is long.

The embodiment of the application provides an Alg-CuFe solution, a preparation method and application thereof, wherein the Alg-CuFe solution comprises the following raw materials: a CuFe solution and a sodium alginate solution with a volume ratio of 1:1; the CuFe solution comprises CuFe nanoparticles and water, the mass concentration of the CuFe nanoparticles in the CuFe solution is 2 mg / mL; the sodium alginate solution comprises sodium alginate and water, the mass concentration of the sodium alginate in the sodium alginate solution is 1.8-2.4%; the Alg-CuFe solution has the beneficial effects of high-efficiency excretion of cesium ions and cesium radiation protection; and is suitable for the technical field of nanomaterials.

A single-mode excitation color-changing luminescent upconversion material, and its preparation method are provided. The molecular formula of the single-mode excitation color-changing luminescent upconversion material is AxMOCly-1:Yb / Ln, where A is at least one of Lithium(I) ion (Li+), Sodium(I) ion (Na+), Sodium(I) ion (K+), or Cesium(I) ion (Cs+); M is at least one of Lanthanum(III) ion (La3+), Yttrium(III) ion (Y3+), Gadolinium(III) ion (Gd3+), or Lutetium(III) ion (Lu3+); Ln is at least one of Erbium(III) ion (Er3+), Holmium(III) ion (Ho3+), or Holmium(III) ion (Tm3+), with 1≤x≤4 and 4≤y≤7. The excitation wavelength range of the material is 950 nanometers (nm)-1100 nm, and the emission wavelength range is 400 nm-800 nm. Under single-mode near-infrared excitation, the material exhibits color-changing upconversion luminescence.

The application discloses an SCM-IC-2 molecular sieve composite material and a preparation method and application thereof. The SCM-IC-2 molecular sieve composite material comprises an acid molecular sieve, ammonium phosphomolybdate and an alumina binder. The preparation method of the material comprises the following steps: (1) heating and activating the acid molecular sieve to obtain a solid precursor; (2) mixing the solid precursor, ammonium phosphomolybdate, alumina binder and water to obtain a mixture; and (3) forming the mixture by spraying to obtain the SCM-IC-2 molecular sieve composite material. The SCM-IC-2 molecular sieve composite material provided by the application can be used as an adsorption material for capturing and detecting metal ions in water, especially cesium ions, and has the technical effects of high capture rate, fast capture speed and no need of additional adjustment of the acidity of a water sample.

The invention discloses a method for preparing chromium-doped molybdenum disulfide from chrome tanning waste liquid, a product and application, and the method comprises the following steps: S1, measuring the chrome tanning waste liquid after suction filtration, adding a molybdenum source, and stirring to prepare a mixed metal salt solution; s2, adding a sulfur source into the mixed metal salt solution, and stirring to obtain a mixed solution; and S3, transferring the obtained mixed solution into a polytetrafluoroethylene reaction kettle, carrying out hydrothermal reaction at 150-220 DEG C, and drying to obtain the chromium-doped molybdenum disulfide. The prepared chromium-doped molybdenum disulfide nano material has good adsorption performance, and the removal rates of cesium ions and strontium ions in wastewater can reach 80% and 50% or above respectively.

The invention provides tail liquid cesium ion trace detection equipment and a high-purity cesium carbonate preparation process, and relates to the technical field of cesium ion trace detection, the tail liquid cesium ion trace detection equipment comprises a detection table, a reaction tank, a pushing mechanism, a sample liquid extrusion mechanism and a detection mechanism; a mounting seat is mounted in the detection table, an electric turntable is mounted in the mounting seat, a positioning plate is fixedly arranged at the top of the electric turntable, the reaction tank is positioned above the positioning plate, a side frame is mounted on the side wall of the mounting seat and positioned on one side of the reaction tank, and the detection table adopts an ECL mode for detection. According to the scheme, the detection sample liquid is pushed into the reaction tank in a pushing extrusion mode, the volume, the flow velocity and the mixing state of the sample liquid can be accurately controlled through the design, which is crucial to the accuracy and the stability of trace cesium ion detection, and the pushing extrusion mode can ensure that the volume of the sample liquid injected into the reaction tank each time is consistent; and a reliable basis is provided for subsequent generation of light-emitting signal detection concentration quantitative matching.

This invention relates to the field of adsorption and separation materials technology, specifically to a spherical cesium ion adsorbent material, its preparation method, and its application. The spherical cesium ion adsorbent consists of spherical beads with a diameter of 2-2.5 mm and an ordered porous honeycomb structure on the surface. Using chitosan, ZIF-8, and nickel ferrocyanide as raw materials, chitosan / ZIF-8 beads are first prepared via in-situ synthesis. Then, nickel ferrocyanide is loaded onto the chitosan / ZIF-8 base using an impregnation method to prepare beads with cesium ion adsorption properties. This method is low-cost and easy to recycle. The spherical cesium ion adsorbent is mixed with a cesium ion-containing solution under neutral or alkaline conditions for adsorption and separation. Rapid solid-liquid separation can be achieved after the cesium ions are adsorbed, facilitating recovery. It exhibits high adsorption efficiency and is suitable for adsorbing low concentrations of cesium ions from cesium-containing aqueous solutions.

The invention belongs to the field of selective adsorbents, and particularly relates to a rubidium cesium ion selective adsorbent based on a porous metal organic framework material and a preparation method thereof, and the preparation method comprises the following steps: covalently embedding a crown ether derivative functional monomer into a zirconium-based MOF skeleton, and carrying phosphomolybdic acid or phosphotungstic acid in a limited range. The adsorbent realizes high-selectivity adsorption of rubidium and cesium ions under the background of high-concentration alkali metal through the size matching effect of crown ether and the ion exchange synergistic effect of heteropoly acid, and has structural stability and cyclic regeneration performance.

The application provides tail liquid cesium ion trace detection equipment and high-purity cesium carbonate preparation process, relates to the technical field of cesium ion trace detection, and comprises a detection table, a reaction pool, a pushing mechanism, a sample liquid extrusion mechanism and a detection mechanism; a mounting seat is internally mounted in the detection table, an electric turntable is internally mounted in the mounting seat, a positioning plate is fixedly arranged at the top of the electric turntable, the reaction pool is located above the positioning plate, a side frame is mounted on the side wall of the mounting seat and located on one side of the reaction pool, and the detection table is detected in an ECL mode. The detection sample liquid is pushed into the reaction pool in a pushing and extruding mode, the volume, flow rate and mixing state of the sample liquid can be accurately controlled through the design, the accuracy and stability of trace cesium ion detection are crucial, the pushing and extruding mode can ensure that the volume of the sample liquid injected into the reaction pool is consistent every time, and a reliable basis is provided for subsequent generation of a luminescence signal, detection of concentration and quantitative matching.

The invention discloses a bipyridine coordinated catalyst, a preparation method of the bipyridine coordinated catalyst, a compound catalyst and application of the compound catalyst. B is a lithium ion, a sodium ion, a cesium ion, a magnesium ion, a strontium ion, an ammonium ion, a hexadecyl tetramethyl benzyl ammonium ion, an octadecyl tetramethyl ammonium ion, an octadecyl hexamethyl ammonium ion, a dodecyl dibutyl phosphonium ion, a tetradecyl propyl phosphonium ion, a butyl phosphonium ion, a tributyl ethyl phosphonium ion, a tetrabutyl phosphonium ion or a tributyl hexyl phosphonium ion; the ionic liquid is selected from ammonium ions, trimethylammonium ions, tetrapropylammonium ions, tributyl ethylammonium ions, benzyl dimethyl ammonium ions or benzyl dimethyl phosphonium ions; m is Mn; r is selected from C1-C14 alkyl groups; x is an integer between 1 and 18; and y is an integer between 1 and 36. The catalyst provided by the invention can improve the selectivity of nicotinic acid oxidation reaction and has strong reaction activity.

The utility model discloses a magnetic stirring device for preparing a rubidium cesium ion selective adsorbent, and relates to the field of chemical agent production equipment, the magnetic stirring device comprises a device main body, the bottom of the device main body is provided with a supporting bottom plate, the supporting bottom plate is provided with a mounting groove matched with the device main body, and the device main body is internally provided with a placement groove; and a connecting bottom plate is arranged at the center position in the mounting groove. In the stirring process, along with material stirring, the stirring rod is influenced by resistance, and when the flowability of materials is reduced, the stirring rod drives the first induction plate to be in contact with the second induction plate, the electromagnetic valve is triggered to be opened, and flowing liquid is automatically increased. The intelligent design can accurately cope with material changes, ensures continuous, uniform and efficient stirring, avoids adsorbent quality fluctuation caused by non-uniform stirring, greatly improves the product quality stability, and effectively meets the requirements of industrial production for high-precision adsorbents.