142 results about "Phosphide compound" patented technology

The invention provides a method for preparing ethylene glycol and 1,2-propylene glycol by using a high-concentration saccharide solution. Reaction raw materials comprise cane sugar, glucose, fructose, fructosan, xylose, soluble lower polyxylose and soluble starch. According to the method, high-concentration saccharide is used as a reaction raw material, and a high-pressure pump feeding mode is used in a reaction process which is performed in a high-pressure reaction kettle; iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium and platinum which serve as transition metal in eighth, ninth and tenth groups are used as hydrogenation active ingredients; the hydrogenation active ingredients form a composite catalyst together with metal tungsten, tungsten carbide, tungsten nitride, tungsten phosphide, tungsten oxide, tungsten sulfide, tungsten chloride, tungsten hydroxide, tungsten bronze, tungstic acid, tungstate, metatungstic acid, metatungstate, paratungstic acid, paratungstate, peroxotungstic acid, peroxotungstate and tungsten-containing heteropolyacid which serve as catalytic active ingredients; and the high-concentration saccharide solution can be efficiently prepared into the ethylene glycol and the propylene glycol at high selectivity and high yield in a one-step catalytic conversion process under the hydrothermal condition that the temperature is 120 to 300 DEG C and the hydrogen pressure is 1 to 13MPa. By the method, the problem of coking of the high-concentration saccharide in the catalytic conversion process can be effectively solved, and high-concentration ethylene glycol and propylene glycol can be prepared by the high-concentration saccharide.

Structure and method for growing crystalline superlattice rare earth oxides, rare earth nitrides and rare earth phosphides and ternary rare-earth compounds are disclosed. The structure includes a superlattice having a plurality of layers that forming a plurality of repeating units. At least one the layers in the repeating unit is an active layer with at least one species of rare earth ion.

The invention discloses an oxidized graphene insulating heat-radiating coating. The oxidized graphene insulating heat-radiating coating is characterized by being composed of, by weight, 300-30 parts of resin, 1 part of oxidized graphene and 100-10 parts of resin curing agent, and the oxidized graphene is synthesized by adopting an improved Hummers method or phosphorylated oxidized graphene modified by phosphide. The oxidized graphene insulating heat-radiating coating is prepared by mixing oxidized graphene dispersion liquid or phosphorylated oxidized graphene dispersion liquid prepared after dispersing oxidized graphene in a dispersion liquid solvent with resin and resin curing agent. By the oxidized graphene insulating heat-radiating coating, the problem that insulativity and thermal conductivity of existing materials are difficult to realize at the same time is solved.

An electrode material of Fe¿CLi phosphate and its composite metal phosphate is electrode material of LiFePO4 and LiFePO4 / MxP in high density spherical shape with diameter of 2micro m. The electrode material of LiFePO4 and LiFePO4 / MxP can be prepared by low ¿C temperature controllable one ¿C stage atomizing process in short flow.

A thermodynamically stable metallic contact for binary oxide-, nitride-, carbide or phosphide-semiconductors and a method of its preparation, the contact is formed in a high temperature reaction in vacuum of a metal bi-layer with the binary semiconductor substrate. With a proper choice of the two metallic layers, each metal forms a single phase with only one of binary semiconductor elements. The resulting phases form distinct layers in a thermodynamically stable sequence.

A preparation method and an application of a graphene @ metal phosphide @ carbon nano composite material. The invention relates to preparation methods and applications of a graphene composite material and aims to solve the problems that metal phosphides in the prior art are poor and low in electric conductivity, are poor in reaction reversibility, and are liable to agglomerate and expand. The preparation method includes the steps of: 1) preparing metal oxide nanospheres; 2) preparing metal oxide @ carbon nanospheres; 3) preparing metal phosphite @ carbon nanospheres; and 4) performing high-temperature carbonization to prepare the graphene @ metal phosphide @ carbon nano composite material. The composite material is used as an anode material in lithium ion batteries or sodium ion batteries. The specific capacity of a CR 2025 button lithium ion battery, which is produced with the nano composite material as an anode material, is still higher than 1000 mAh / g after cycle for three times under current density of 0.2 A / g; and after cycle for 100 times, the specific discharge capacity of the battery is still higher than 700 mAh / g.

A positive electrode material for a lithium sulphur battery and a preparation method thereof, and the lithium sulphur battery are disclosed. The positive electrode material comprises activated carbon,carbon black, transition metal or a transition metal compound, and sublimed sulfur; and the transition metal compound is metal carbide, metal boride, metal nitride, metal phosphide, metal oxide or metal sulfide. The activated carbon is utilized as a main body of sulfur carrying; the carbon black can carry sulfur and can also strengthen the conductivity of the positive electrode material; and thetransition metal or the transition metal compound can play a fixation role in lithium polysulfide produced in an electrochemical reaction, inhibits the shuttle effect of polysulfide ions, and enablesthe cycle performance of the lithium sulphur battery to be improved. The positive electrode material for the lithium sulphur battery disclosed by the invention has the advantages of being simple and easy to obtain, easy to be prepared on a large scale, and the like, and the lithium sulphur battery with long circulation, high specific capacity and high specific energy can be obtained.

The invention provides a carbon / alumina composite carrier catalyst used for hydrazine decomposition reaction and a preparation method thereof. The catalyst showed in the formula is A / C-Al2O3, C-Al2O3 is the carbon / alumina composite carrier, and active constituent A is transition metal Mo, W, Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt or carbonization, nitride and phosphide thereof; wherein, the content of the A is 2-40wt percent and the preparation temperature of the A is 300-900 DEG C. The invention has simple preparation, especially for the preparation of active species of the transitional metal carbonization, which uses H2 instead of CH4 / H2 gas used in the past preparation to have direact reduction; the invention prevents carbon deposition on the surface of the carbonization from inactivating, thus being beneficial to acquire more catalytic active sites.

The invention discloses a nano particle / carbon fiber cloth composite electrode material and a preparation method thereof, comprises loading a transition metal salt in a micron-sized phenolic aldehyde-based activated carbon fiber treated with pre-nitric acid by an impregnation method, The mesoporous carbon fibers embedded with transition metal oxide / sulfide / nitride / phosphide nanoparticles can alsobe prepared by high temperature oxidation / sulfidation / nitridation / phosphatization. The nano-particle / carbon fiber cloth composite electrode material prepared by the invention has excellent electrochemical performance and can be applied in the fields of energy storage and conversion such as supercapacitor, lithium / sodium ion battery and electrocatalysis.

The invention discloses a cobalt phosphide / nitrogen and phosphorus doped porous carbon material, a preparation method and application thereof in an air electrode catalyst of a zinc-air battery. The preparation method comprises the following steps: adding an organic ligand into deionized water to obtain a ligand solution; adding metal zinc and cobalt salt into deionized water to obtain a metal saltsolution; slowly adding a metal salt solution into the ligand solution, and carrying out a reaction completely; and centrifuging the mixed solution, cleaning the obtained lower precipitate with deionized water for multiple times, carrying out freeze drying, and carrying out in-situ phosphatization / carbonization treatment on the sample. According to the invention, a bimetallic skeleton compound isused as a catalyst precursor; metal phosphide grows on the surface of the heteroatom doped carbon material through in-situ phosphorization; the cobalt phosphide / nitrogen-phosphorus doped porous carbon material is used as an air electrode catalyst of a zinc-air battery, and long-time and high-stability charge-discharge circulation can be realized. The cobalt phosphide / nitrogen-phosphorus doped porous carbon material is used as the air electrode catalyst of the zinc-air battery.

The invention relates to a low-temperature anti-fingerprint surface treating agent for a galvanized steel sheet and an environment-friendly surface treated galvanized steel sheet of which the surface is treated by use of the surface treating agent. The surface of the galvanized steel sheet does not contain chromium and does not need to be dried at a high temperature, and a surface treatment film can be formed on the surface under a low-temperature drying condition; the manufacturing process is environment-friendly and low in energy consumption; a composition (namely the surface treating agent) containing specific water-based resin and phosphide, specific organic silicon compound, titanium compound, vanadium compound and oxidic polyethylene particles is applied to the surface of the galvanized steel sheet and then dried at a low temperature ranging from 50 to 75 DEG C, and consequently, the obtained surface treated galvanized steel sheet has excellent properties such as excellent alkali resistance, solvent resistance, corrosion resistance, fingerprint resistance, coating adherence and the like.

A component is made of or coated with a refractory material for use at high temperature, e.g. in an aluminium production cell, an arc furnace or an apparatus for treating molten metal. The refractory material comprises particles of a refractory metal compound selected from metal borides, silicides, nitrides, carbides and phosphides, in an oxide matrix. The oxide matrix comprises a bonding mixed oxide made of a single mixed oxide or a plurality of miscible mixed oxides. The refractory material is obtainable from a heat treated slurry that comprises: a colloidal and / or polymeric oxide carrier, suspended particles of the refractory metal compound and suspended metal oxide particles. The suspended refractory metal compound particles and the suspended metal oxide particles are both reactable with the colloidal and / or polymeric oxide to form the bonding mixed oxide.

An approach for forming a semiconductor device is provided. In general, the device is formed by providing a metal layer, a cap layer over the metal layer, and an ultra low k layer over the cap layer. A via is then formed through the ultra low k layer and the cap layer. Once the via is formed, a barrier layer (e.g., cobalt (Co), tantalum (Ta), cobalt-tungsten-phosphide (CoWP), or other metal capable of acting as a copper (CU) diffusion barrier) is selectively applied to a bottom surface of the via. A liner layer (e.g., manganese (MN) or aluminum (AL)) is then applied to a set of sidewalls of the via. The via may then be filled with a subsequent metal layer (with or without a seed layer), and the device may the then be further processed (e.g., annealed).

The invention discloses a light diffusion plate for simultaneously raising the light transmittance and the haze and a matching technology thereof, solving the technical problems that the addition of a light diffusion agent and a fire retardant in the light diffusion plate seriously affects the light transmittance of the light diffusion plate itself. The light diffusion plate comprises a base material consisting of transparent resin and light diffusion agent, wherein the light diffusion agent comprises nitride of titanium, or nitride of zinc, or nitride of tin, or nitride of iron, or nitride of copper, or phosphide of copper, or phosphide of iron, or a mixture of two or more of the above substances, and the weight of the light diffusion agent accounts for 0.01-5wt% of that of the transparent resin. According to the invention, the light diffusion plate prepared by the invention has low hygroscopicity, warping resistance, flame resistance, UV aging resistance and yellowing resistance.

The invention discloses a carbon-cobalt-molybdenum double-metal phosphide composite material and a preparation method thereof. The composite material is formed by a carbon skeleton with a dodecahedronstructure and MoP, CoP and CoMoP2 nano particles uniformly embedded in the carbon skeleton. The carbon skeleton with the dodecahedron structure is effectively kept, and the nano double-metal phosphide particles are uniformly embedded in a carbon substrate, so aggregation and falling of the nano particles can be prevented, stability of a catalyst is reinforced, high conductivity of the carbon substrate and the synergistic effect between the nano double-metal phosphide particles can also be developed, and catalytic activity of the phosphide is further reinforced. The carbon skeleton is capableof effectively improving the electrical conductivity of a whole catalyst material, thereby further improving catalytic performance thereof. The synergistic effect between various phases of the double-metal phosphide has a very important function to improve electrochemical catalytic performance. The nano double-metal phosphides are uniformly embedded in the carbon substrate, the aggregation and falling of the nano particles can be prevented, the stability of the catalyst is reinforced, and the composite material also has excellent electrochemical hydrogen evolution performance in an alkaline environment.

The invention relates to a multi-level metal phosphide as well as a preparation method and application thereof. The multi-level metal phosphide comprises metal foam framework and metal phosphide covering the surface of the metal foam framework. Through macropores with the average pore diameter of 50-500 microns are distributed among the metal foam framework, and macropores with the average pore diameter of 10-100 microns are distributed on the surface of the metal foam framework; the metal phosphide is cobalt phosphide or iron-cobalt bi-metal phosphide; the metal phosphide is of a sheet line structure similar to a woven bag. The multi-level metal phosphide provided by the invention has excellent performance of catalyzing hydrogen evolution reaction and oxygen evolution reaction at the sametime under an alkaline condition, so that the multi-level metal phosphide can be used as a bifunctional electrocatalyst and can also be used as a cathode and an anode to catalyze electrochemical water decomposition reaction; good stability is shown on hydrogen evolution reaction, oxygen evolution reaction and electrochemical water decomposition.

The invention discloses a preparation method of a cage-shaped nickel-iron bimetallic phosphide loaded nitrogen-doped porous carbon material. The preparation method comprises the following steps: cyanide ions are used as organic ligands, nickel ions and iron ions are used as metal sources; a ferronickel bimetallic Prussian blue compound growing on melamine is prepared through a coprecipitation method, the precursor is etched into a cage-shaped cube through one-step ammonia water, the cage-shaped cube and sodium hypophosphite are calcined at the temperature of 350 DEG C in an Ar atmosphere, andthe cage-shaped ferronickel bimetallic phosphide loaded nitrogen-doped porous carbon material is obtained. The PBA nano hollow cage-shaped particle group obtained by an ammonia water etching method can expose more active sites in the reaction process; the sintered and roughened porous carbon substrate with the melamine sponge three-dimensional structure not only can fix active sites to prevent agglomeration, but also can increase conductivity to accelerate charge transfer; metal phosphide is effectively formed through doping of phosphorus, the electronic structure around nickel and iron can beadjusted, and the charge transfer process can be accelerated.

The principles of the present invention are used to reduce the conduction band offset between chalcogenide emitter and pnictide absorber films. Alternatively stated, the present invention provides strategies to more closely match the electron affinity characteristics between the absorber and emitter components. The resultant photovoltaic devices have the potential to have higher efficiency and higher open circuit voltage. The resistance of the resultant junctions would be lower with reduced current leakage. In illustrative modes of practice, the present invention incorporates one or more tuning agents into the emitter layer in order to adjust the electron affinity characteristics, thereby reducing the conduction band offset between the emitter and the absorber. In the case of an n-type emitter such as ZnS or a tertiary compound such as zinc sulfide selenide (optionally doped with Al) or the like, an exemplary tuning agent is Mg when the absorber is a p-type pnictide material such as zinc phosphide or an alloy of zinc phosphide incorporating at least one additional metal in addition to Zn and optionally at least one non-metal in addition to phosphorus. Consequently, photovolotaic devices incorporating such films would demonstrate improved electronic performance.

The invention relates to a nickel phosphide compound with a multi-level pore structure and a preparation method and application thereof. The nickel phosphide compound comprises a metal foam frameworkand a nickel phosphide compound micron sheet covering the surface of the metal foam framework, through macropores with the average pore diameter of 50-500 microns are distributed among the metal foamframeworks, and macropores with the average pore diameter of 10-100 microns are distributed on the surfaces of the metal foam frameworks; and nano-pores are distributed in the nickel phosphide compound micron sheet. The nickel phosphide compound has a multi-level pore structure, the through macropores are beneficial to electrolyte transfer and gas diffusion, and the macropores and the nano-pores are beneficial to exposing more active sites and increasing the contact with an electrolyte so that the reaction rate is increased. The nickel phosphide compound can be used as a working electrode forelectrochemical decomposition of water to produce hydrogen, shows excellent hydrogen evolution performance under full pH, and has the advantages of low cost, excellent electro-catalytic hydrogen evolution performance and strong stability.

The invention provides a metal phosphide and heteroatom doped porous carbon composite material as well as preparation and application thereof. The porous carbon composite material is prepared by taking a biomass derived polymer and metal salt as raw materials. The composite material contains heteroatom functional groups and metal phosphide, metal forming the metal phosphide is one or more of Fe, Co, Ni, Cu, Rh, Ru, Mn and Mo, and the particle size of the metal phosphide is 1-80 nm. According to the metal phosphide and heteroatom doped porous carbon composite material, cheap and easily available substance derivatives are used as raw materials; the raw materials provide a carbon source, an oxygen source, a phosphorus source, a nitrogen source or a sulfur source, the metal phosphide and the heteroatom doped porous carbon material are combined under mild conditions, the preparation method is simple, and the obtained composite material has a large specific surface area, can provide a largenumber of sites with reaction activity, and has better performance in the fields of electrocatalysis, lithium-sulfur batteries, sodium batteries, supercapacitors and gas adsorption.

The invention discloses a small-particle-size metal phosphide nanoparticle / reduced graphene composite material and a preparation method thereof. The preparation method comprises the following steps: 1) preparing silica-coated metal oxide composite particles; 2) loading the composite particles onto graphene oxide to obtain a graphene oxide-based compound; 3) removing silica of the composite particles in the graphene oxide-based compound; and 4) carrying out phosphating treatment so as to obtain the small-particle-size metal phosphide nanoparticle / reduced graphene composite material. Metal phosphide in the composite material of the invention has a small particle size, in a range of 3 nm to 5 nm; and the phosphide nanoparticles are highly dispersed in reduced graphene, which is favorable forincreasing the exposure degree of active sites. The preparation method is simple in process, low in cost, and favorable for large-scale production.

The invention belongs to the field of electrocatalysts, and discloses a preparation method and application of a ruthenium-doped cobalt phosphide electrocatalyst for producing hydrogen by high-performance electrochemical decomposition of water. The method comprises the following steps: synthesizing a Co-MOF precursor with an open skeleton through a simple aging reaction, and further forming a RuCo-MOF catalyst with a mesoporous nanostructure through ion etching; and finally, carrying out low-temperature phosphating reaction to obtain the Ru-CoP hollow porous nanocube electrocatalyst. The series of metal-doped phosphides have relatively low charge transfer resistance and reaction potential barrier of hydrogen evolution reaction, and have excellent performance in electro-catalytic hydrogen evolution reaction. Meanwhile, the catalyst is low in cost, simple and convenient to operate, simple in process and excellent in catalytic performance, and provides basic application research for the material in the field of electrocatalysis.

The invention relates to a method for preparing metal phosphide as an electrode material and application of the metal phosphide, and belongs to the technical field of supercapacitor electrode materials. Elemental phosphorus, metal salt, and hexadecyl trimethyl ammonium bromide are adopted as raw materials. The method includes firstly preparing a reaction precursor from the raw materials, and thenperforming a hydrothermal reaction, suction filtration, drying and post-treatment processes so that the elemental phosphorus and the metal salt fully react to form the metal phosphide to serve as theelectrode material. By utilizing the simple hydrothermal synthesis method, the operation procedure is greatly simplified, and the percent of pass of products is increased. In addition, the supercapacitor using the metal phosphide prepared by the method as an electrode material has a higher surface active site, a larger specific capacitance, and good stability, the production efficiency of capacitors is greatly increased and the method is suitable for large-scale industrial production.

The invention provides a high-strength nucleated glass and a preparation method thereof. The nucleated glass comprises BAS, LAS component, fluoride, phosphide, rare-earth metal oxide, carbonate and necessary calcium and magnesium components. The compressive strength of the nucleated glass is more than 420MPa, the breaking strength is more than 100MPa, and other performances such as melt viscosity and thermal coefficient of expansion are also improved.

The invention belongs to the technical field of high-performance / high-energy-density lithium ion battery anodes, and particularly relates to an MXene / metal phosphide composite material, and an anode material and preparation and application thereof. The preparation method comprises the following steps: mixing and stirring a metal salt of a transition metal element, an MXene material and water, carrying out hydrothermal reaction, and drying to obtain an MXene / metal salt mixture; and in a protective atmosphere, carrying out heat treatment on the MXene / metal salt mixture and a phosphorus source toobtain the MXene / metal phosphide composite material. The invention also provides an MXene / metal phosphide-based composite battery anode material. The anode material comprises the MXene / metal phosphide composite material, a conductive agent and a binder, and the battery anode material has good long-cycle stability, high energy density and excellent rate capability, and can be applied to various fields.

The invention discloses a preparation method of a FeNiP / C@ MXene composite negative electrode material for a lithium ion battery. The method comprises the following steps: dissolving nickel acetylacetonate and ammonium ferrous sulfate in ethanol, adding the solution into a solution of N, N-dimethylformamide dissolved with a surfactant and an organic ligand, strongly and magnetically stirring, and transferring the solution into a high-pressure reaction kettle for reacting; carrying out centrifugal separation and vacuum drying to obtain a mixed metal organic framework template; mixing and stirring a template and a pretreated MXene material, and centrifuging to obtain a Fe / Ni-MOF@ MXene precursor; and phosphating and calcining the precursor in a protective atmosphere to obtain the FeNiP / C@ MXene composite material. According to the invention, phosphide is crystallized and nucleated in MOF, the hollow carbon shell provides a sufficient space for the volume change of the internal phosphide, and the MXene at the outermost layer can limit the side reaction of the electrolyte and the phosphide so that initial coulombic efficiency is improved.

The invention discloses a metal phosphide nanofiber and a preparation method thereof. The preparation method of the metal phosphide nanofiber includes the steps: 1) preparing spinning precursor solution; taking metal inorganic salt as a metal source, taking phytic acid as a phosphorus source, taking polyvinyl alcohol as a high-molecular polymer and taking water as a solvent and taking Triton-X-100as a surfactant; 2) acquiring a metal phosphide precursor nanofiber by electrostatic spinning; 3) performing heat treatment on the metal phosphide precursor nanofiber to obtain the metal phosphide nanofiber; 4) enabling the general formula of chemical components of the metal phosphide nanofiber prepared by the method to be MxPy, wherein M can be any one or any proportional combination of Co, Ni,Cu and Mo, P is phosphorus, and x and y are stoichiometric amounts of metal and phosphorus in metal phosphide. The preparation method has the advantages of simple flow, easiness in acquiring raw materials and no pollution. The prepared metal phosphide nanofiber can be used for catalysts, super-capacitors, lithium ion batteries and the like.

The invention discloses an immersion type phosphide synthesis and growth device under a magnetic field, belongs to the field of semiconductor material preparation, and particularly relates to a device for synthesizing and growing a semiconductor phosphide in a mode of immersing phosphorus into a metal melt under the action of a static magnetic field. The device comprises a main furnace body, a crucible in the main furnace body, a heater on the periphery of the crucible and a heat preservation layer, and further comprises an injection synthesis system connected with a driving device, wherein the injection synthesis system bears red phosphorus and sinks into the crucible under the action of a driving device. According to the invention, By adopting the device provided by the invention, red phosphorus sinks into a melt in a solid form and floats upwards from the bottom of a crucible after being gasified, so that the problems of suck-back and the like caused by phosphorus bubbles are solved; and a transverse static magnetic field inhibits the floating speed of bubbles and also inhibits melt convection in the temperature gradient direction, so that the synthesis process is more stable and rapid.