1405 results about "Transition metal ions" patented technology

A method for preparing a Li_xM_yPO₄ compound having an olivine structure includes: preparing a solution containing transition metal M ions, Li⁺ ions and PO₄³⁻ ions; drying the solution to form particles of a starting material; and forming the particles of the starting material into particles of the Li_xM_yPO₄ compound with an olivine structure, in which 0.8≦x≦1.2 and 0.8≦y≦1.2, and coating the particles of the Li_xM_yPO₄ compound with a carbon layer thereon.

The invention discloses an electrolyte solution for a high-capacity lithium-ion battery. The electrolyte solution includes non-aqueous solvent, lithium hexafluorophosphate, negative electrode film forming additive, positive electrode surface activity inhibiting additive and transition metal ion complexant; the negative electrode film forming additive includes organic ester negative electrode film forming additive of 1 to 10wt% of the total electrolyte solution and inorganic lithium salt negative electrode film forming additive of 0.5 to 2wt% of the total electrolyte solution; the positive electrode surface activity inhibiting additive includes fluorinated ether additive of 1 to 5wt% of the total electrolyte solution and nitrile additive of 0.1 to 5wt% of the total electrolyte solution; the transition metal ion complexant is of 0.1 to 1.0wt% of the total electrolyte solution. The electrolyte solution is adaptive to the high-capacity lithium-ion battery and is capable of optimizing the circulating performance and high-temperature storage performance of the lithium-ion battery. The invention further provides a preparation method of the electrolyte solution and the high-capacity lithium-ion battery adopting the electrolyte solution.

A food spoilage sensor of the general formula

wherein M is a transition metal ion; D₁, D₂, D₃ and D₄ can be the same or different and can be N or P; R¹ and R², R³ and R⁴, R⁵ and R⁶, and R⁷ and R⁸ can be the same or different and from, taken together with the adjacent carbon atoms to which they are bonded and joined together, an aromatic or a cyclic group with at least one of the aromatic or cyclic groups possessing one or more polymerizable moieties. The complex selectively binds biogenic amines which are released by food spoilage microorganisms and undergo a detectable color change upon exposure thereto.

One embodiment of the present invention is to provide a stress-stimulated luminescent material which has a unique crystal structure and which emits conventionally unachievable intense light. The stress-stimulated luminescent material of one embodiment of the present invention includes a basic structure in which a plurality of tetrahedral molecules each having an AlO₄-like tetrahedral structure or an SiO₄-like tetrahedral structure share atoms of apexes of the tetrahedral structures so as to be coupled to one another so that a basic material structure is formed and at least either alkali metal ions or alkali earth metal ions are inserted into the void are partially substituted by at least either rare earth metal ions or transition metal ions.

The invention provides a metal organic framework material used for absorbing and separating CO2 and a preparation method thereof. The metal organic framework material is a rigid metal carboxyl compound cluster-like structure which is formed by transition metal ions and multidentate organic ligands through covalent bonds and intermolecular forces. An amine polymer is modified on the metal organic framework material; and the metal organic framework material used for absorbing and separating the CO2 has a specific surface area of 1,000 to 1,200 m<2>/g, and a pore volume of 0.4 to 0.6 cm<3>/g. The preparation method comprises the following steps of: respectively dissolving the nitrate, the chloride or the carbonate of copper or zinc and 1,3,5-trimesic acid together in a stoichiometric ratio in water or an organic solvent; mixing uniformly and sufficiently to react to obtain a BTC bridged complex crystal; and applying a product obtained by reacting an obtained BTC bridged complex crystal with the solution of polyethyleneimine to the metal organic framework material used for absorbing and separating the CO2. The material can realize selective absorption of a gas under a low pressure.

A curable composition containing a lake dye having an absorption maximum in the wavelength region of from 700 nm to 1100 nm and a thermosetting compound and/or a photo-setting compound; a solid imaging device installing therein a filter prepared using the curable composition; and a lake dye represented by the following formula (V):

wherein L¹ represents a methine chain composed of odd number(s) of methine group(s); A¹ and A² are each independently represents an alkyl group having a sulfo group; Y represents a cation necessary to balance a charge and selected from the group consisting of alkali earth metal ions (Mg²⁺, Ca²⁺, Ba²⁺, Sr²⁺), transition metal ions (Ag⁺, Fe⁺, Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺) and (Al³⁺).

Disclosed is a metal colloid comprising: a solvent composed of water or a mixed solvent of water and an organic solvent; cluster particles comprising one or more metal species; and a protective agent for protecting the cluster particles, characterised in that the protective agent comprises a polymeric material which can be bound to one or more ion species selected from the group consisting of alkali earth metal ions, transition metal ions, rare earth metal ions, an aluminum ion and a gallium ion, and the protective agent has one or more ion species selected from the group consisting of alkali earth metal ions, transition metal ions, rare earth metal ions, an aluminum ion and a gallium ion bounded thereto.

A lithium-ion conducting, solid electrolyte is deposited on a thin, flexible, porous alumina membrane which is placed between co-extensive facing side surfaces of a porous, lithium-accepting, negative electrode and a positive electrode formed of a porous layer of particles of a compound of lithium, a transition metal element, and optionally, another metal element. A liquid electrolyte formed, for example, of LiPF₆ dissolved in an organic solvent, infiltrates the electrode materials of the two porous electrodes for transport of lithium ions during cell operation. But the solid electrolyte permits the passage of only lithium ions, and the negative electrode is protected from damage by transition metal ions or other chemical species produced in the positive electrode of the lithium-ion cell.

The invention relates to a preparation method of an aminated nanofiber membrane with a high specific surface area. The preparation method comprises the following steps of: dissolving two polymer materials with the weight ratio of 1: (0.1-10) or dissolving a polymer material and an inorganic salt into a solvent, dissolving while stirring at the temperature of 20-80 DEG C for 4-96h, and carrying out electrostatic spinning to obtain a composite nanofiber membrane; soaking the composite nanofiber membrane into water, regulating the pH value, soaking at the temperature of 20-95 DEG C for 2-48h, washing and drying to obtain a nanofiber membrane with a porous micro/nano structure and a high specific surface area; and immersing the nanofiber membrane with a porous micro/nano structure and a high specific surface area into water, adding an amination reaction reagent to carry out amination reaction at the temperature of 50-200 DEG C, then, taking out the fiber membrane, washing the fiber membrane to be neutral, and drying the fiber membrane to obtain the aminated nanofiber membrane with a high specific surface area. The product provided by the invention is applied to fields such as adsorption and separation of precious metal ions, heavy metal ions and transition metal ions, chemical probes, sensors, environment monitoring, catalysts, biological medicines and the like.

The invention discloses a method for preparing oligomeric fucosylated glycosaminoglycan which is prepared by depolymerizing fucosylated glycosaminoglycan by a depolymerization method of peroxide catalyzed by a 4th period transition metal ion in an aqueous medium, and the preparation method has mild reaction condition, good reproducibility and stability, high pyrolysis selectivity and uniform and controllable product quality. The polysaccharide molecule number of the obtained oligomeric fucosylated glycosaminoglycan using GalNAc as a reducing end is not less than 80 percent, the weight average molecular weight is about 6, 000-20, 000Da, and the protein disulfide isomerase (PDI) is 1.0-2.0.

The invention relates to a preparation method for electrode material of a super capacitor of an ordered nano-tube array structure. A titanium-base titanium dioxide nano-tube is used as a carrier of the electrode; metallic oxide with electrochemical activity is loaded on the tube wall surface of the nano-tube; functional electrode material of the nano-tube array structure is built, wherein the tube diameter of the nano-tube is 50-200nm, the wall thickness is 10-20nm and the length is 0.2-50 mu m. The preparation method is as follows: firstly, adopting the titanium-base titanium dioxide electrode carrier of the ordered nano-tube array structure prepared by a self-template anodic oxidation reaction synthetic method; then, taking the titanium-base titanium dioxide electrode carrier of the ordered nano-tube array structure as a working electrode and transition metal ion or noble metal ion water solution as working electrolyte, carrying out electro reduction-electro oxidation reaction by circulation, synthesizing a metallic oxide coating layer on the wall surface of the nano-meter tube in situ, and preparing electrode material with the electrochemical activity. The electrode material of the ordered nano-tube array structure is used as the stored energy application of the electrode of the super capacitor.

The invention relates to a fluorescent ion probe (I) with high selectivity and high sensitivity in detection and the application of the fluorescent ion probe in identifying and detecting heavy metal ion and transition metal ion, wherein, the Y is an organic conjugate group with fluorescence transmitting function such as pyrene, naphthalene, 4-amidogen-1, 8-naphthyl imide, Dan sulfonamide, anthracene, carbazole, benzimidazoins, benzoxazoles, boron fluoride bipyrrole (BODIPY), fluorescein, 3, 4, 9, 10-perylenetetracarboxylic diimide or rhodamine B; the X is acylamino group, sulfoamino group or ester group. The fluorescent ion probe uses the fluorescence peak of fluorescence chromophore aggregate as the response signal to identify metal ion, thereby effectively avoiding the quenching effect of transition metal ion and heavy metal ion on fluorophore; moreover, the fluorescent ion probe realizes selective identification of heavy metal ion and transition metal ion in various solvents and aqueous solution in particular.

A fuel cartridge connectable to a fuel cell is disclosed. To eliminate the internal pressure of the fuel liner (bladder), scavengers of oxygen, carbon dioxide, transition metal ion and water are stored inside the fuel liner in order to remove oxygen, carbon dioxide, transition metal ions, and water. Also, the fuel cartridge comprises an outer casing and an inner flexible fuel liner containing fuel for the fuel cell.

The present invention includes compositions, surface and bulk modifications, and methods of making of (1−x)Li[Li_1/3Mn_2/3]O₂.xLi[Mn_0.5-yNi_0.5-yCo_2y]O₂ cathode materials having an O3 crystal structure with a x value between 0 and 1 and y value between 0 and 0.5, reducing the irreversible capacity loss in the first cycle by surface modification with oxides and bulk modification with cationic and anionic substitutions, and increasing the reversible capacity to close to the theoretical value of insertion/extraction of one lithium per transition metal ion (250-300 mAh/g).

An electrocatalyst based on a highly electroconducting polymer and a transition metal, in which transition metal atoms are covalently bonded to heteroatoms of the backbone monomers of the polymer. The covalently bonded transition metal atoms are nucleation sites for catalytically active transition metal particles. The complex is prepared by complexing a highly electroconducting polymer with transition metal coordination ions and then reducing the transition metal ions to neutral atoms. An electrode for a fuel cell is made by impregnating an electrically conducting sheet with the catalytic complex and drying the impregnated sheet. The scope of the present invention includes such electrodes and the fuel cells that incorporate these electrodes.

The invention provides a nickel base trinary positive electrode material, which is obtained through compounding coupling agents onto the surface of nickel base materials and then performing heat treatment. The hydrophilic surface property of the nickel base trinary positive electrode material is improved by a compound modification method; the problem that the nickel base trinary positive electrode material is sensitive to the moisture in the environment is effectively solved; the residue lithium content on the surface of the particles is reduced; in addition, the discharging specific capacity loss of the nickel base trinary positive electrode material cannot be caused; the dissolution of transition metal ions on the surfaces of the particles in the long-time circulation process can be inhibited; the corrosion of HF generated in the charging and discharging process on the surface of the materials can be reduced; the electrochemical performance of the materials is improved.

The invention is directed to novel methods of stabilizing blood compositions for use in the quality control of analytical techniques. The novel method comprises removing leucocytes from a blood composition to yield a depleted blood composition, stabilizing the leucocytes by treatment with an effective amount of a stabilizing agent comprising an aged transition metal solution, and then adding the resultant stabilized leucocytes to the depleted blood composition or a second blood component composition.

A composite chitosan/copper antibacterial agent with broad spectrum is prepared proportionally from chitosan and Cu ions through purifying chitosan, coordination with Cu ions, depositing in the mixed solvent of acetone and alcohol, washing and drying.

The invention discloses a nano-titanium dioxide composite material for wastewater treatment, which is composed of (a) nano-titanium dioxide, (b) adsorptive porous material and (c) nano-titanium dioxide modified material; the nano-titanium dioxide modified material includes Inert metals Ag, Au, Pt or/and transition metal ions Cr, Mn, Fe, Co, Ni, Cu or/and rare earth metal ions La ³⁺ , Y ³⁺ 、Eu ³⁺ Or/and Fe‑Sn, Fe‑La. The nano-titanium dioxide composite material of the present invention is composed of nano-titanium dioxide modified material, nano-titanium dioxide, and adsorptive porous material, which improves the photocatalytic activity of nano-titanium dioxide and the utilization rate of light, as well as the utilization rate of nano-titanium dioxide. The decomposition of matter has a significant effect.

The invention discloses an element co-doping modified ternary lithium ion battery cathode material, and a preparation method thereof. According to the preparation method, compounds of two kinds of metals Me<1> and Me<2> are respectively selected based on the difference of ion radiuses of lithium ion and transition metal ions in the lithium nickel cobalt manganese ternary material, and are subjected to high temperature sintering with a nickel cobalt manganese precursor, wherein the ion radius of the metal Me<1> ion is close to that of lithium ion, and the metal Me<1> ion is one or a mixture of ions selected from Zn2+ and Zr4+, the radius of the metal Me<2> ion is close to that of transition metal ion Co3+ or Mn4+, and the metal Me<2> is one or a mixture of ions selected from Al3+, V5+, and Ge4+; and then a primary product obtained via high temperature sintering is subjected to second cladding so as to obtain the element co-doping modified ternary lithium ion battery cathode material. The element co-doping modified ternary lithium ion battery cathode material is capable of achieving synergistic effects of two metal elements fully, and improving cycle performance of lithium ion batteries effectively.

The present invention pertains to a process for synthesizing nano-scale yttrium aluminum garnet (YAG) fluorescent powders having formula (I):

(Y_3−xR¹_x)(Al_5−yR²_y)O₁₂  (I)

wherein R¹ and R² are independently selected from the elements consisting of rare earth metals and transition metals, and each of x and y is independently a value between 0 and 1.5, where the process comprises the steps:

• • (a) forming an aqueous solution comprising rare earth metal ions, transition metal ions, yttrium ion and aluminum ion;
  • (b) adding a precipitating agent to the aqueous solution of step (a) in an amount sufficient to allow the rare earth metal ions, transition metal ions, yttrium ion and aluminum ion comprised in the aqueous solution to substantially complex with the depositing agent;
  • (c) drying the gel of step (b) to obtain a dried gel;
  • (d) adding a dehydroxying compound to the dried gel of step (c) and subjecting it to a further drying step; and
  • (e) sintering the product of step (d) at a temperature between 700 and 1400° C. to obtain the nano-scale yttrium aluminum garnet fluorescent powders of formula (I).

A catalyst comprising a zeolite loaded with copper ions and at least one trivalent metal ion other than Al⁺³, wherein the catalyst decreases NO_x emissions in diesel exhaust. The trivalent metal ions are selected from, for example, trivalent transition metal ions, trivalent main group metal ions, and/or trivalent lanthanide metal ions. In particular embodiments, the catalysts are selected from Cu—Fe-ZSM5, Cu—La-ZSM-5, Fe—Cu—La-ZSM5, Cu—Sc-ZSM-5, and Cu—In-ZSM5. The catalysts are placed on refractory support materials and incorporated into catalytic converters.

The invention discloses a method for preparing a contamination-resistant composite reverse osmosis membrane. The method comprises the steps of (a) preparing a polysulfone support membrane; (b) preparing an aromatic polyamide reverse osmosis composite membrane by using the polysulfone support membrane obtained in Step (a); and (c) grafting chitosan on the surface of the aromatic polyamide reverse osmosis composite membrane obtained in Step (b). According to the method for preparing a contamination-resistant composite reverse osmosis membrane, chitosan is grafted on the surface of the polyamide reverse osmosis composite membrane through a chemical treatment method, so that hydrophilicity of the surface of the membrane as well as the water flux of the membrane is improved; meanwhile, contaminations such as hydrophobic organic matters and transition metal ions can be prevented from being absorbed on the surface of the membrane, thereby greatly improving the anti-pollution capability of the membrane; in addition, chitosan has broad-spectrum antibacterial property, so that the resistance of the membrane against microbial contamination is improved.

The invention relates to a preparation method for lithium ion battery positive electrode materials based on transition metal carbonate precursors, which is characterized by comprising the following steps that: (1) transition metal element compounds, precipitation agents and additives are sufficiently mixed and prepared into mixed solution with the transition metal ion concentration being 0.01 M to 10M, the mixed solution is placed into a reaction kettle to carry out hydrothermal reaction at 80 to 200 DEG C for 2h to 48h, then, precipitates are washed and dried, and the transition metal carbonate precursors are obtained; and (2) the prepared transition metal carbonate precursors and lithium compounds conforming to the chemical measurement proportion are sufficiently mixed and are then placed into an air atmosphere furnace for carrying out heat treatment, and the required lithium ion battery positive electrode materials based on the transition metal carbonate precursors are obtained. Compared with the prior art, the preparation method has the advantages that the metal ions of the obtained materials are sufficiently mixed, the forms and the appearances are uniform, the grain diameter distribution is narrow, the tap density is high, the charging and discharging voltage platform is higher, the rate charging and discharging performance is excellent, and the circulation performance is stable. Simultaneously, the method is simple, the implementation is easy, the control parameters are fewer, the reaction time is short, and the cost is low.

The invention discloses a single longitudinal-mode optical fiber laser with low noise, narrow linewidth and high power. Polarization maintaining optical fiber is rare-earth-doped phosphate single-mode glass optical fiber, the component of a fiber core is phosphate glass which consists of 70P2O5-8Al2O3-15BaO-4La2O3-3Nd2O3, the fiber core of the polarization maintaining optical fiber is doped with high-concentration luminous ions, the luminous ions are one or combination of more than one of lanthanide ions and transition metal ions, the doping density of the luminous ions is greater than 1*10<19>ions/cm<3> and the luminous ions are evenly doped in the fiber core. A polarization maintaining fiber Bragg grating with the narrow linewidth and a dichroscope form a front cavity mirror and a rear cavity mirror of the optical fiber laser, a centimeter-sized erbium-ytterbium co-doped phosphate glass polarization maintaining optical fiber is taken as a laser working substance, and polarization maintaining output laser generated by a single-mode semiconductor laser is taken as a pumping source, thus achieving the single longitudinal-mode laser output by designing and manufacturing the reflection spectrum width of the polarization maintaining fiber Bragg grating and controlling the cavity length of the whole laser cavity.