Multilayer porous hollow bowl-shaped carbon material and preparation method thereof
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A hollow bowl and carbon material technology, applied in the preparation/purification of carbon, etc., can solve the problem of rare multi-layer porous hollow bowl-shaped carbon materials
Active Publication Date: 2019-08-27
UNIV OF SCI & TECH BEIJING
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At present, there are few reports on multilayer porous h
Method used
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Embodiment 1
[0022] Dissolve 3 grams of glucose in 30 ml of water, add 0.4 grams of sodium oleate and 0.1 grams of P123, mix well, seal the liquid in a stainless steel water heating tank, put it in an oven at 160 ° C, keep it warm for 8 hours, take out the water heating tank, Place in the air to cool to room temperature, then open the water-heated jar, pour out the mixture inside, and centrifuge in a centrifuge at 8000 rpm to obtain a precipitate, then repeatedly wash with water and dry to obtain a hollow carbon bowl. Put 1 gram of hollow bowl-shaped carbon into 10 ml of ammonia water with a pH value of 10, disperse evenly by ultrasonic oscillation, add 0.5 g of tetraethyl orthosilicate, seal it, stir at room temperature for 24 hours, and put it in a centrifuge at 9000 rpm Centrifuge in the middle to obtain a precipitate, wash it repeatedly with water and alcohol, then dry it in a vacuum drying oven, and keep it warm at 50°C for 12 hours; put 1 g of the dried powder into 10 ml of water, add...
Embodiment 2
[0024] Dissolve 1 gram of xylose in 30 ml of water, add 0.4 gram of trioctylamine, mix well, seal the liquid in a stainless steel water heating tank, put it in an oven at 180°C, keep it warm for 48 hours, take out the water heating tank, and place it in the air Cool to room temperature, then open the water heat jar, pour out the mixture inside, centrifuge in a centrifuge at 8,000 rpm to obtain a precipitate, and then wash it repeatedly with water to obtain a hollow carbon bowl. Put 2 grams of hollow bowl-shaped carbon into 10 ml of potassium hydroxide solution with a pH value of 12, disperse evenly by ultrasonic oscillation, add 1 g of tetraethyl orthosilicate, seal it, stir at room temperature for 36 hours, and set it at 9000 rpm Centrifuge in a centrifuge to obtain a precipitate, wash it repeatedly with water and alcohol, then dry it in a vacuum oven, and keep it warm at 60°C for 12 hours. Put 1 gram of dried powder into 10 ml of water, add 0.3 gram of fructose, disperse eve...
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Abstract
The invention discloses a multilayer porous hollow bowl-shaped carbon material and a preparation method thereof and belongs to the field of inorganic material preparation. The material is an amorphouscarbonic particle with a bowl-shaped hollow structure, has a sunken bowl-shaped appearance, internally has a hollow structure, a spherical wall is of a multilayer structure, and holes, including micropores and mesopores, exist in the bowl wall. The preparation method comprises the steps of respectively dissolving a surfactant and a carbon source in water, and carrying out hydrothermal carbonization to obtain hydrothermal carbon hollow bowl-shaped carbon; dispersing the powder in an alkaline aqueous solution, dripping ethyl orthosilicate, executing stirring for a certain time, collecting a product, then dispersing the product into a carbon source water solution, and carrying out hydrothermal carbonization coating; repeating the steps of silicon oxide coating and carbon coating according tothe demand for the number of layers; finally, calcining the powder, executing pickling, removing the silicon-containing compound, and executing drying to obtain the multi-layer porous hollow bowl-shaped carbon material. The material has high space utilization rate and tap density, the multilayer spherical wall can provide a large number of active sites for chemical reaction, and synthesis controllable in layer number and thickness of the spherical wall can be achieved by adopting the method.
Description
technical field [0001] The invention belongs to the technical field of inorganic material preparation, and in particular relates to a novel multilayer porous hollow bowl-shaped carbon material and a preparation method thereof. Background technique [0002] In recent years, due to their excellent physical and chemical properties, carbon materials have been active in various fields, showing a wide range of application and market values, and injecting new vitality into the development of science and technology. Among them, hollow carbon materials have attracted more and more attention due to their unique structures, such as large specific surface area, nano-effects brought about by thin walls, and large internal space. Hollow bowl-shaped materials not only have the advantages of hollow spherical materials, but also bowl-shaped materials have their unique properties. Their weakly symmetrical structure can induce stacking behavior between particles. Compared with hollow spherical...
Claims
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