60results about "Metal cyanides" patented technology

The invention provides crystalline nanoscale particles and tubes made from a variety of stoichiometries of BxCyNz where x, y, and z indicate a relative amount of each element compared to the others and where no more than one of x, y, or z are zero for a single stoichiometry. The nanotubes and nanoparticles are useful as miniature electronic components, such as wires, coils, schotky barriers, diodes, etc. The nanotubes and nanoparticles are also useful as coating that will protect an item from detection by electromagnetic monitoring techniques like radar. The nanotubes and nanoparticles are additionally useful for their mechanical properties, being comparable in strength and stiffness to the best graphite fibers or carbon nanotubes. The inventive nanoparticles are useful in lubricants and composites.

The invention features delayed-setting calcium phosphate pastes which are useful for the preparation of delivery vehicles for biologically active agents, useful for the treatment of orthopedic conditions and can be stored for long periods without prematurely setting.

A block copolymer, preferably a block copolymer such as poly(isoprene-block-ethylene oxide), PI-b-PEO, is used as a structure directing agent for a polymer derived ceramic (PDC) precursor, preferably a silazane, most preferably a silazane commercially known as Ceraset. The PDC precursor is preferably polymerized after mixing with the block copolymer to form a nanostructured composite material. Through further heating steps, the nanostructured composite material can be transformed into a nanostructured non-oxide ceramic material, preferably a high temperature SiCN or SiC material.

A structure of intimately contacting carbon-hexacyanometallate is provided for forming a metal-ion battery electrode. Several methods are provided for forming the carbon-hexacyanometallate intimate contact. These methods include (1) adding conducting carbon during the synthesis of hexacyanometallate and forming the carbon-hexacyanometallate powder prior to forming the paste for electrode printing; (2) coating with conducting carbon after hexacyanometallate powder formation and prior to forming the paste for electrode printing; and (3) coating a layer of conducting carbon over the hexacyanometallate electrode.

The invention discloses a water-based sodium ion total battery based on a nickel prussian blue positive electrode material and a preparation method and application thereof, and belongs to the field oflarge-scale energy storage. According to the invention, sodium citrate is added as a chelating agent and polyvinylpyrrolidone is added as a surfactant to control the growth process of the Prussian blue material in the process of preparing the Prussian blue positive electrode material by a coprecipitation method, and finally, the monoclinic phase nickel Prussian blue nanocube is synthesized. The carbon-coated sodium titanium phosphate negative electrode material, a carbon-coated sodium titanium phosphate negative electrode material and a water-soluble sodium salt electrolyte are assembled intoa low-cost and high-performance water-based sodium ion battery by taking the carbon-coated sodium titanium phosphate negative electrode material as a positive electrode material. The method is expected to be applied to a large-scale energy storage system to promote the development of new energy and renewable energy industries.

The present invention relates to an environmentally benign process for the simultaneous preparation of nanocrystalline anatase titanium dioxide and hydrazine mohydrochloride, in substantial amounts from the acidic aqueous titanium tetrachloride solution by reacting with hydrazine monohydrate at ambient conditions of temperature and pressure. The process of the present invention is simple, easy to operate, pollution free, high in product purity and homogeneous in product particle.

The invention has an object of providing catalysts that are not corroded in acidic electrolytes or at high potential, have excellent durability and show high oxygen reducing ability. An aspect of the invention is directed to a process wherein metal carbonitride mixture particles or metal oxycarbonitride mixture particles are produced from an organometallic compound of a Group IV or V transition metal, a metal salt of a Group IV or V transition metal, or a mixture of these compounds using laser light as a light source.

A method for efficiently producing a cyanogen halide with suppressed side effects, and a method for producing a high-purity cyanate ester compound at a high yield includes contacting a halogen molecule with an aqueous solution containing hydrogen cyanide and/or a metal cyanide, so that the hydrogen cyanide and/or the metal cyanide is allowed to react with the halogen molecule in the reaction solution to obtain the cyanogen halide, wherein more than 1 mole of the hydrogen cyanide or the metal cyanide is used based on 1 mole of the halogen molecule, and when an amount of substance of an unreacted hydrogen cyanide or an unreacted metal cyanide is defined as mole (A) and an amount of substance of the generated cyanogen halide is defined as mole (B), the reaction is terminated in a state in which (A):(A)+(B) is between 0.00009:1 and 0.2:1.

The invention discloses a method for making potassium auric cyanide, which uses potassuim cyanide and metallic gold as raw materials and matches the gold per kilogram with 1020-1030 grams of the potassuim cyanide. The method comprises the following: 1) a step of pressing gold, which is to roll the gold into a thin gold sheet as an electrode; 2) a step of electrolyzing, which is to carry out electrolysis reaction in a diaphragm electrolyzer with the thin gold sheet as an anode, a stainless steel sheet as a cathode and a potassuim cyanide solution as electrolyte, so as to gradually dissolve the thin gold sheet as the anode into Au(CN)2<->; 3) a step of purifying, which is to purify potassium auric cyanide generated in electrolysis through a low-temperature cooling crystallization method after the thin gold sheet is completely dissolved; 4) a step of condensing; 5) a step of purifying repeatedly; 6) a step of condensing; 7) a step of drying, which is to bake potassium auric cyanide crystals in vacuum so as to get a finished product. The adoption of the method shortens electrolysis time, reduces purifying times, and improves the quality and yield of potassium auric cyanide.

The invention discloses a preparation method of a cyano cathode material. The preparation method comprises specific steps as follows: mixing sodium ferrocyanide with deionized water to obtain a solution A, mixing transition metal M with the deionized water to obtain a dispersion solution B, mixing the solution A with the dispersion solution B, and then adding dilute acid, and obtaining the cyano cathode material through a hydrothermal reaction. According to the preparation method of the cyano cathode material, the morphology and the lattice structure of a target product can be regulated; the prepared cyano cathode material has good crystallinity, and can remarkably improve electrochemical performance of sodium ion batteries after being applied to electrodes of the sodium ion batteries.

Provided are a saturable absorber including at least one material selected from a group of MXenes, and a Q-switching and mode-locked pulsed laser system using the same.

The present invention allows the relatively easy production of binary and ternary compounds of metals, including noble metals. Embodiments of the invention allow, for the first time, the production of novel compositions of metal compounds, such as thick, stress-free single-phase binary and ternary compositions of metals, and porous compositions of such compounds. As such, the present invention allows for the production of metal compounds and/or compositions of matter thereof that have not before been possible, thereby providing for important new materials that find use in a multitude of different applications, including medical device and non-medical device applications.

The invention relates to an electrode material for an aptamer sensor, the aptamer sensor and a preparation method, and belongs to the technical field of electromechanical sensors. The electrode material for the aptamer sensor is prepared according to a method comprising the following steps: (1) dissolving manganese salt, citrate and cobalt cyanide acid salt into a solvent; carrying out a reactionto obtain a manganese cobalt Prussian blue analogue; (2) roasting the obtained manganese cobalt Prussian blue analogue to obtain the electrode material for the aptamer sensor. The method is simple, high in operability, and low in cost; the prepared electrode material is high in electrochemical activity and high in combination effect with a nucleic acid aptamer material; the aptamer sensor preparedaccording to the method is high in selectivity, stability, repeatability, reproducibility and adaptability, and low in detection limit.

The present invention provides processes for making double metal cyanide (DMC) catalysts, by simultaneously controlling the alkalinity of the transition metal salt, the molar ratio of water to total cations, the molar ratio of ligand to transition metal cation, the molar ratio of metal salt anion to metal cyanide anion, and the presence of a polymeric complexing ligand during the catalyst precipitation step. The substantially amorphous catalysts made by the present invention are highly active and may find use in the production of polyols.

The present invention is a method by which the mine can obtain a supply of calcium cyanide for use in its leaching operations. Specifically, one preferred method within the scope of the invention involves producing hydrogen cyanide directly at a mine site using formamide as a starting material. Alternative methods of producing hydrogen cyanide at the mine site using easily transportable starting materials, such as methanol and urea, are disclosed. The hydrogen cyanide is neutralized at the mine site with slaked lime (Ca(OH)₂) to form the calcium cyanide.

The invention relates to an aptamer sensor and a preparation method thereof, and belongs to the technical field of electrochemical sensors. The invention provides the aptamer sensor comprising an electrode, an electrode material coated to the surface of the electrode and used for the aptamer sensor, and a nucleic acid aptamer attached to the electrode material used for the aptamer sensor, whereinthe electrode material used for the aptamer sensor is nickel-cobalt Prussian-blue analogue. The aptamer sensor exhibits good selectivity, stability, reproducibility, reactivity and applicability and low limit of detection. For example, the aptamer sensor obtained by a bare gold electrode, nickel-cobalt Prussian-blue analogue and carcino-embryonic antigen nucleic acid aptamer exhibits high sensitivity and selectivity on CEA (Earcino-Embryonic Antigen) detection in a range of 1.0fg.mL<-1>-5.0ng.mL<-1> (1.62fM), and the application of the nickel-cobalt Prussian-blue analogue is widened.

The invention discloses a method for extracting copper-containing cyanided waste liquid by a solvent to recycle copper. The method is characterized in that quaternary ammonium salt is used as an extracting agent, and a sodium chloride solution is used as a back washing agent; by extraction and back washing, enrichment of the copper in waste water is realized, and the treatment volume of the waste water is reduced; the copper can be recycled from high-concentration copper-containing back washing liquid in various ways; the method does not have the extraction effect on cyanides existing in a free state, so that an extracting solution can be directly returned to a cyanidation leaching procedure to recycle the cyanides.