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Preparation method of hollow carbon nanospheres and hollow carbon nanospheres
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A nano-carbon sphere and hollow technology, applied in the direction of nano-carbon, nano-technology, nano-technology, etc., can solve problems such as not suitable for large-scale production applications, human body and environmental hazards, and cumbersome steps, so as to improve production efficiency and avoid reunion , The preparation process is simple and easy to operate
Pending Publication Date: 2021-01-08
湖南纳微新材料科技有限公司
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These processes not only introduce a large amount of toxic substances, causing harm to the human body and the environment, but also have cumbersome steps and poor repeatability, which are not suitable for large-scale production applications.
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Embodiment 1
[0033] Such as figure 1 Shown, a kind of preparation method of hollow carbon nanosphere comprises the following steps:
[0034] S1, the SiO 2 Place the ball in the crucible, then place the crucible in a tube furnace, and raise the temperature to 800°C at a heating rate of 10°C / min in an Ar atmosphere;
[0035] S2. Turn on the radio frequency power supply, methane is carried by Ar gas into the tube furnace for deposition reaction, wherein the Ar gas flow rate is 12Sccm, the methane gas flow rate is 36Scm, the furnace pressure is maintained at 210Pa, the radio frequency power is 350W, and the deposition reaction is 2h;
[0036] S3, after the reaction is completed, turn off the radio frequency power supply and methane, cool down to room temperature in an Ar atmosphere, and take out the product;
[0037] S4. Put the product obtained in step S3 into excess NaOH solution, heat to 80° C. and stir for 24 hours to remove SiO in the product 2 ball;
[0038] S5. After the treatment i...
Embodiment 2
[0042] A preparation method of hollow carbon nanospheres, comprising the following steps:
[0043] S1, the SiO 2 Place the ball in the crucible, then place the crucible in a tube furnace, and raise the temperature to 800°C at a heating rate of 5°C / min in an Ar atmosphere;
[0044] S2. Turn on the radio frequency power supply, methane is carried by Ar gas into the tube furnace for deposition reaction, wherein the flow rate of Ar gas is 10Sccm, the flow rate of methane gas is 30Sccm, the furnace pressure is maintained at 140Pa, the radio frequency power is 350W, and the deposition reaction is 2h;
[0045] S3, after the reaction is completed, turn off the radio frequency power supply and methane, cool down to room temperature in an Ar atmosphere, and take out the product;
[0046] S4. Put the product obtained in step S3 into excess NaOH solution, heat to 80° C. and stir for 24 hours to remove SiO in the product 2 ball;
[0047]S5. After the treatment in step S4 is completed, f...
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Abstract
The invention discloses a preparation method of hollow carbon nanospheres and the hollow carbon nanospheres, wherein the preparation method comprises the following steps: S1, putting SiO2 spheres intoa tubular furnace, vacuumizing, and then heating to 750-800 DEG C in an Ar atmosphere; S2, introducing argon and methane according to the gas flow ratio of 1:3 with the furnace pressure is 140-210 Pa, carrying out radio frequencydischarge with the radio frequency power of 300-400 w, and carrying out a heat preservation reaction for 2-4 h; S3, turning off a radio frequency power supply and methane, and cooling to room temperature in an Ar atmosphere to obtain carbon nanospheres of which the inner core is SiO2; and S4, removing SiO2 in the carbon nanospheres through impregnation with an alkaline solution, filtering and drying, and thus obtaining hollow carbon nanospheres. By using the method, the wall thickness of the hollow carbon nanospheres can be controlled in the preparation process,so that the hollow carbon nanospheres with different wall thicknesses can be prepared according to actual requirements, and the hollow carbon nanospheres can be effectively prepared and utilized.
Description
technical field [0001] The invention relates to the field of preparation of nano carbon spheres, in particular to a preparation method of hollow nano carbon spheres and the hollow nano carbon spheres prepared by the preparation method. Background technique [0002] The properties and applications of carbon materials with special morphology and structure are attracting more and more attention. As a nanomaterial with high specific surface area and low density, hollow carbon nanospheres not only have good permeability, high chemical and thermal stability, adsorption characteristics, non-toxicity, biocompatibility, etc. The spherical structure makes hollow carbon nanospheres have great potential application value in many fields such as electrochemical energy, gas storage, adsorption separation and catalysis. At present, scholars have studied a variety of methods for preparing hollow carbon nanospheres. Among these methods, the template method is the most widely used, while the ...
Claims
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