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.

Preparation method and application of graphene @ metal phosphide @ carbon nano composite material

A multi-hole-and-shell nickel phosphide hollow microsphere compound is provided with a multi-hole secondary nanostructure, and the chemical formula of the multi-hole-and-shell nickel phosphide hollow microsphere compound is Ni2P, wherein Ni to P is 2:1; the diameter of the microsphere is 1.5-2.5 [mu]m, and multi-hole shells are formed by assembling secondary nano particles being 12-17 nm; a solid phase phosphide multi-shell NiO precursor method is adopted for preparation of the multi-hole-and-shell nickel phosphide hollow microsphere compound, and a precursor NiO of the method is prepared through a self-template method; and a material can form a three-electrode system for testing of an electro-catalysis hydrogen evolution property of the material. The multi-hole-and-shell nickel phosphide hollow microsphere compound has the advantages that a multi-hole-and-shell hollow structure formed by assembling the nano particles is advantageous to interface contact of electrode gas-liquid-solid three phases, a better material conveying channel can be provided, and a structural unit of the nano particles can provide more catalytic active sites, so that electro-catalysis activity of the multi-hole-and-shell nickel phosphide hollow microsphere compound is effectively improved, and meanwhile, a product has good electrochemical stability and can serve as a novel catalyst to be applicable to electrolysed water and the like.

Multi-hole-and-shell nickel phosphide hollow microsphere and preparation method and application thereof

The invention discloses a preparation method and application of a nickel phosphide framework structure-based composite material The method comprises the following steps: (1) preparing a Ni-metal organic framework structure-based material by adopting hydrothermal reaction; (2) mixing the dried Ni-metal organic framework structure-based material and a phosphorus source, and performing calcination and phosphorization in a tube furnace to obtain a nickel phosphide framework structure material; (3) mixing the nickel phosphide framework structure-based material obtained in step (2) and sublimed sulfur, and uniformly grinding, heating to be melted and cooling to room temperature to obtain the nickel phosphide framework structure-based composite material The prepared composite material has extremely high electrical conductivity, the problem of poor electrical conductivity of a conventional sulfur cathode in a lithium-sulfur battery can be remarkably improved, and by the strong bonding action of nickel phosphide and sulfur, the shuttle effect of lithium polysulfide can be inhibited, and the cycle life of the lithium-sulfur battery can be prolonged

Preparation method and application of nickel phosphide framework structure-based composite material

The invention provides a method for preparing a zinc phosphide/cobalt phosphide heterojunction photocatalyst based on an MOFs template and belongs to the technical field of preparation of photocatalytic materials. ZIF-ZnCo is used as a template, and the zinc phosphide/cobalt phosphide heterojunction photocatalyst with a porous structure is formed by conducting oxidation and phosphating treatment on the template. The original framework structure characteristics of a precursor MOFs are kept based on the catalyst, active catalysis sites are fully exposed, meanwhile the catalyst promotes separation of photoproduced electron holes and improves an photo-response behavior through a good synergistic effect, and therefore shows excellent water photolysis hydrogen-production performance.

Method for preparing zinc phosphide/cobalt phosphide heterojunction photocatalyst based on MOFs template

The invention provides a method for preparing hollow cobalt phosphide (Co2P) multi-level microspheres. First, ethylene glycol is added into polytetrafluoroethylene liner, then cobalt salt containing crystal water is added, a mixture is stirred until solids are completely dissolved, and a clear and transparent solution is prepared; then PEG-10000 (polyethylene glycol) is added, a mixture is stirred again until PEG-10000 is completely dissolved, and a transparent solution is obtained; yellow phosphorus is added into the solution, and the polytetrafluoroethylene liner is sealed in a stainless steel die and is put into a temperature-constant oven to be heated and react under a sealed condition; after the reaction, the polytetrafluoroethylene liner is cooled to reach the room temperature along with the oven and then is centrifuged to obtain a raw product; then the raw product is washed sequentially with distilled water, absolute ethyl alcohol and benzene respectively; ultimately, the washed product is subjected to vacuum drying to obtain a hollow Co2P multi-level nano and microscale material which has the performance of dyeing waste water degradation. The method adopts raw materials easy to obtain, is easy, convenient and good in repeatability, and does not require post thermal treatment.

Method for preparing hollow cobalt phosphide (Co2P) multi-level microspheres

The invention provides a high-temperature-resistance adhesive capable of curing at room temperature, which comprises the following raw materials in percentage by weight: 93 to 96 percent of adhesive component, 3 to 6 parts of curing agent and 0.2 to 1 percent of accelerator. The adhesive component comprises a resin, a filler, a modifier and a diluting agent, wherein the resin is 20 to 45 percent of epoxy resin 618 and 6101; the filler consists of 15 to 45 percent of quartz powder, 2 to 6 percent of asbestos powder, 20 to 50 percent of aluminum powder and 0.1 to 2 percent of iron powder; the modifier consists of 2 to 7 percent of silicon resin, 2 to 5 percent of polyamide resin and 1 to 4 percent of dibutyl phthalate or dioctyl phthalate; and the diluting agent is 0.5 to 3 percent of dimethylbenzene. In the invention, the preparation process of the adhesive is simple, the cost is low, curing is performed at room temperature and the use is convenient. The adhesive can be used for adhesion in the high-temperature connection of ceramic materials and steel materials. The adhesive has high strength at normal temperature and has high heat resistance.

High-temperature-resistance adhesive capable of curing at room temperature

The invention discloses a coke breeze binder for formed coke and a preparation method of formed coke by using same. The binder comprises the following components by weight percent: 15-45% of polyvinyl alcohol (PVA), 20-60% of sodium silicate and 15-45% of bentonite. The preparation method of the formed coke comprises the following steps: 1) grinding and machining the coke breeze raw material to coke breeze with the particle size of less than 3mm; 2) adding 1 part of the binder in 9 parts of coke breeze by weight; 3) stirring for 10-15 minutes, discharging; 4) standing for 15-20 minutes at the room temperature to place in a forming machine, performing pressure forming to obtain cylindrical products; and 5) standing for 2-8 hours at the room temperature, and drying at 120 DEG C. Compared with the existing various binders for formed coke, the binder of the invention has common components, simpler preparation process, low cost, convenient use method and no secondary pollution. The formed coke prepared by the binder has the advantages of high cold strength, good water resistance, low cost and low addition of ash and is characterized by higher hot strength and wide range of raw material sources.

Coke breeze binder for formed coke and preparation method of formed coke by using same

The invention relates to a preparation method for a graphene loaded cobalt nickel phosphide composite material The method includes: dissolving a nickel salt and a cobalt salt in deionized water, putting graphene oxide in deionized water to conduct ultrasonic treatment into a homogeneous solution, mixing the two fully, then transferring the mixture into a polytetrafluoroethylene lining, then adding red phosphorus, finally performing water hydro-thermal treatment, and subjecting the obtained product to vacuum drying, thus obtaining the graphene loaded cobalt nickel phosphide composite material The method provided by the invention has the advantages of environment friendliness, simple and safe operation and the like

Preparation method for graphene loaded cobalt nickel phosphide composite material

The invention relates to a preparation method for nickel phosphide with a hollow core-shell structure. The preparation method comprises the following steps: firstly, adding deionized water in the polytetrafluoroethylene liner of a reaction kettle, weighing soluble nickel salt, adding the soluble nickel salt into the deionized water and stirring by a magnetic stirrer until the soluble nickel salt is dissolved; then adding an anionic surfactant and a cationic surfactant and stirring until the anionic surfactant and the cationic surfactant are completely dissolved; adding elementary substance phosphorus into the solution, then sealing the polytetrafluoroethylene liner into a stainless steel die, heating from the room temperature under the closed condition, moving obtained black precipitates to a centrifuge tube after the reaction is completed, sequentially and repeatedly washing by benzene, water and absolute ethyl alcohol and centrifuging; finally, placing the washed product into a vacuum drying box to obtain the nickel phosphide with the hollow core-shell structure. The prepared nickel phosphide catalyst with the hollow core-shell structure has excellent photocatalytic performance on organic dye, the preparation method is simple to operate, the reaction is easy to control, good repeatability is achieved and heat treatment at the later period is not required.

Preparation method for nickel phosphide with hollow core-shell structure

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