7results about How to "Achieving controllable synthesis" patented technology

The invention belongs to the field of catalysts for oxygen production through seawater electrolysis, and particularly discloses a chromium-doped ferronickel sulfide nanorod array material, a preparation method thereof and application of the chromium-doped ferronickel sulfide nanorod array material to oxygen evolution through seawater electrolysis. The material is a chromium-doped ferronickel sulfide grown in situ on a foamed ferronickel substrate, has components of NiFe, Ni3S2 and (Fe, Ni) 3S4, and is of a nanorod array structure. The preparation method comprises the following steps: putting the cleaned foam ferronickel into a solution containing a sulfur source and chromate, and obtaining the chromium-doped ferronickel sulfide nanorod array material by utilizing a hydrothermal method. As an alkaline water and seawater oxidation electrode, the composite material shows extremely excellent catalytic activity and stability, and has potential application value in the aspect of developing a transition metal OER catalyst for electrolyzing seawater to evolve oxygen.

The invention relates to a reaction furnace device for producing an aluminum nitride nanofiber material. The reaction furnace device comprises a heat transfer rod, a reaction furnace, a reaction kettle, a graphite crucible, an aluminum oxide boat, a graphite column and a hydraulic cylinder, the hydraulic air cylinder is used for pushing the graphite column, the single-layer movable crucible is pushed upwards to sequentially penetrate through the low-temperature area, the high-temperature area and the low-temperature area, and meanwhile different gases are introduced in a matched mode, so that directional and stable growth of nanofibers is achieved. Holes are formed in the side wall of the reaction kettle, and the positions of the holes are consistent with those of the holes in the side surface of the single-layer movable crucible, so that different airflows can be introduced into the three temperature zones. Compared with the prior art, the invention effectively solves the problems of insufficient crystal whisker growth length, disordered crystal lattices and the like caused by fixed crucible position, single gas and constant temperature in the existing reaction kettle, and the technology has important significance on continuous production of alumina nanofibers.

This invention provides a controllable synthesis method for 1,4,7,10-tetraazacyclododecanepentazole salt, belonging to the field of energetic materials technology. It includes two synthesis methods: the first is the synthesis of 1,4,7,10-tetraazacyclododecane dipentazole salt, in which 1,4,7,10-tetraazacyclododecane tetrahydrochloride is dissolved in deionized water, at least 4 equivalents of silver pentazole powder are added, the reaction is performed ultrasonically and in the dark, the precipitate is filtered, and the filtrate is concentrated to obtain the product; the second is the synthesis of 1,4,7,10-tetraazacyclododecane pentaazole nitrate complex salt, which differs from the first in that 1 equivalent of silver nitrate and at least 3 equivalents of silver pentazole powder are added. This invention, by controlling the amount of silver salt added, directly synthesizes dipentazole salt and pentaazole nitrate complex salt from 1,4,7,10-tetraazacyclododecane tetrahydrochloride in one step, solving the problems of difficult raw material synthesis and uncontrollable product structure, laying the foundation for the large-scale preparation and application of energetic materials.

The invention discloses a preparation method of flaky cerium carbonate, and belongs to the technical field of rare earth compound preparation. Comprising the following steps: adding a rare earth cerium salt solution, an ammonium bicarbonate solution and a monocarboxylic substance solution into pure water in a parallel flow manner, carrying out a mixed reaction, controlling the pH value of a reaction endpoint, and carrying out solid-liquid separation to obtain the flaky cerium carbonate. According to the invention, by utilizing the complexing ability of a monocarboxylic substance and rare earth ions, the nucleation and growth regulation of the cerium carbonate crystallization process and the controllable synthesis of the cerium carbonate morphology are realized; the preparation method is simple and easy to implement and low in cost, and the obtained product has a flaky morphology and can be applied to the fields of shielding materials, flame-retardant materials and the like.

The invention belongs to the technical field of high-entropy alloy catalysts, and particularly relates to a high-entropy alloy nanoflower array, a preparation method of the high-entropy alloy nanoflower array and application of the high-entropy alloy nanoflower array as an electrode material. The high-entropy alloy nanoflower array disclosed by the invention comprises five metal elements, namely Co, Ni, Mo, Cu and Zn. The high-entropy alloy nanoflower array is composed of a plurality of two-dimensional nanosheets, and a three-dimensional (3D) porous nanostructure with a large specific surface area is constructed. The material provided by the invention has the advantages of simple preparation, high loading capacity, no precious metal, low cost, high efficiency and stability, and can be used as an electrode of a hydrogen evolution reaction, a hydrazine oxidation reaction and a hydrazine oxidation assisted hydrogen production (OHzS) system. When applied to an OHzS system, only 0.260 V battery voltage and 0.376 V battery voltage are needed to reach the industrial current density of 500 mA cm <-2 > and 1000 mA cm <-2 > respectively, the absolute advantages of high efficiency and low-voltage hydrogen production are shown, and high practical application value is achieved.

This invention discloses a photo-thermal dual-curing adhesive and its preparation method, belonging to the field of electronic adhesive technology. The adhesive comprises, by weight, 25-40 parts of a polyfunctional epoxy resin, 15-30 parts of epoxy acrylate, 15-35 parts of an acrylate compound, 8-16 parts of a polythiol compound, 0.1-5 parts of a photoradical generator, and 0.5-10 parts of a latent curing agent. The polyfunctional epoxy resin contains a thiadiazole ring, and each of the two carbon atoms of the thiadiazole ring is independently attached with a glycidyl ether group, the total number of glycidyl ether groups being ≥3. This invention achieves a unified effect of rapid photocuring and positioning, high adhesive strength, excellent resistance to damp heat aging, and good rework performance through the synergistic effect of the thiadiazole ring polyfunctional epoxy resin, epoxy acrylate, thiol acetylenide derivative TS-G, and polyfunctional polyester acrylate.

This invention relates to a large-size copper-doped manganese thiophosphate single crystal and its preparation method, wherein the single crystal has the chemical formula Cu. x Mn y P2S6, where 0