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Pyrolysis preparation method of size-controllable carbon balls

A technology of uniform size, carbon spheres, applied in the preparation/purification of carbon, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of high equipment cost and complicated operation, and achieve low equipment investment and high purity. High and wide application prospects

Inactive Publication Date: 2013-11-06
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Several new methods have been developed in recent years, including microwave method (Hernandez, J. M. M. et al. Carbon. 2013, 54, 168) and hydrothermal method (Min, L. et al. Mater. Res., 2012, 27, 1117) .In these preparation methods, the operation is complicated, the equipment cost is expensive, and the obtained product must consider the follow-up purification problem

Method used

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  • Pyrolysis preparation method of size-controllable carbon balls
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  • Pyrolysis preparation method of size-controllable carbon balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Such as figure 1 Put the porcelain boat 4 carrying 0.5 gram of iron phthalocyanine into the quartz tube 3 as shown, feed hydrogen gas into the quartz tube 3 at a flow rate of 50ml / min, and then control the heating by the program temperature controller 5 so that the fixed carbon furnace 2 The inner center temperature rises to 1000°C. After constant temperature, the quartz tube 3 is pushed into the charcoal-fixing furnace 2, so that the porcelain boat 4 carrying iron phthalocyanine reaches the position of the furnace mouth of the charcoal-fixing furnace 2 at 550~650°C, and the iron phthalocyanine is heated. Sublimation, under the protection of hydrogen, decompose by heating at 1000°C, keep the reaction temperature for 30 minutes, then pass the diluted gas to cool to room temperature, and obtain carbon spheres with a diameter of 450~560nm. figure 2 It is a scanning electron microscope picture of carbon spheres, it can be seen that the purity is very high and...

Embodiment 2

[0027] Example 2 According to the preparation method of Example 1, only the hydrogen flow rate was changed to 40ml / min to obtain carbon spheres with a diameter of 550-750nm.

Embodiment 3

[0028] Example 3 According to the preparation method of Example 1, only the hydrogen flow rate was changed to 30ml / min to obtain carbon spheres with a diameter of 1000-1100nm.

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Abstract

The invention relates to a pyrolysis preparation method of size-controllable nano / submicro carbon balls. The method comprises following steps: the metal phthalocyanine is brought to a position with a temperature of 500 to 650 DEG C, where the metal phthalocyanine sublimates; then the sublimated metal phthalocyanine is brought to a position with a temperature of 800 to 1200 DEG C by the diluted gas (hydrogen, argon) airflow, and the metal phthalocyanine is heated to decompose there, the reaction temperature is maintained for 5 to 60 minutes, and then the carbon balls are obtained through cooling. Different size carbon micro balls are prepared through the atmospheric pressure chemical vapor deposition (APCVD) method. Compared to the prior art, the method is characterized in that: (1) one-step synthesis method is adopted; (2) through controlling the speed and ratio of the diluted gas airflow, under a proper reaction temperature, pyrolysis carbon micro balls with different sizes (450 to 2000 nm) are prepared; (3) the method has the advantages of little equipment investment, easy operation and simple technology.

Description

Technical field [0001] The invention involves a uniform and controllable nano / sub -micron carbon ball heat solution method. Background technique [0002] As an important material that is closely related to the progress of human civilization, carbon materials have made great contributions in the development of human society in different forms.In recent years, spherical carbon materials have widely used prospects such as catalyst carriers, fuel cells, drug carriers, sewage treatment, lubricants, etc. with their own conductivity and high surface area.Studies have shown that carbon balls in lithium / air battery electrode catalyst, methanol fuel cell catalyst (Wang.k.Q.q. et al .Adva.mater. Res. 2013, 648, 63), the organic pollutants in the water (yin.c.y. et al. Mater. Lett. 2013, 104, 64), super -sensitive electrical student material sensor (Dong.h.f. et al. Biosensors and bioelectronics. 2012, 33, 228) and Donath, E.et Al. Angew.chem., Int. E. 1988, 37, 2202). [0003] So far, the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/05
Inventor 王贤保张长安吕美娇万丽
Owner HUBEI UNIV