Preparation method of porous carbon nanosphere with controllable diameter

A nanosphere, porous carbon technology, applied in nanocarbon, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of low output of carbon nanospheres, and achieve the effect of good monodispersity and uniform diameter

Inactive Publication Date: 2013-03-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows creation of small particles with controlled sizes that are stable over long periods without losing their original shape or function after being used repeatedly (such as when they were made into catalysts). These tiny particles also provide excellent performance compared to traditional methods like impregnated polymers due to its ability to hold more active materials inside them even at high temperatures during manufacturing processes.

Problems solved by technology

The technical problem addressed in this patents relates to efficiently control the sizes of fine particles made from various types of material for different purposes like catalysics and electronics. Existing techniques require multiple steps involving template manipulation which makes them time-consuming processes. Therefore, an improved approach would provide more efficient ways to make these tiny objects even better suited for certain uses.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Measure according to the mass ratio of phloroglucinol: terephthalaldehyde: water = 1:0.7:300, and mix well. Under the stirring speed of 400 rpm, react at 70° C. for 15 minutes, and cool to room temperature to obtain a phenolic prepolymer solution. Then measure according to the mass ratio of resorcinol:formaldehyde solution:ammonia water=1:1.5:0.4, and mix evenly. The mixed solution was slowly added dropwise to the phenolic prepolymer solution, wherein the mass ratio of the mixed solution to the phenolic prepolymer solution was 1:40, and after the addition was completed, it was reacted at a stirring speed of 400 rpm for 24 hours, and then Hydrothermal treatment was performed at 100°C for 24 hours, and the obtained product was dried at 40°C for 12 hours to obtain polymer nanospheres. In a tube furnace, under the protection of inert gas, the polymer nanospheres were heated to 600 °C for carbonization at a heating rate of 0.5 °C / min, and finally the temperature was natural...

Embodiment 2

[0015] Measure according to the mass ratio of phloroglucinol: terephthalaldehyde: water = 1:0.9:340, and mix well. Under the stirring speed of 1000 rpm, react at 70° C. for 240 minutes, and cool to room temperature to obtain a phenolic prepolymer solution. Then measure according to the mass ratio of resorcinol:formaldehyde solution:ammonia water=1:1.8:0.45, and mix evenly. The mixed solution was slowly added dropwise to the phenolic prepolymer solution, wherein the mass ratio of the mixed solution to the phenolic prepolymer solution was 1:45, and after the addition was completed, it was reacted at a stirring speed of 1000 rpm for 24 hours, and in Hydrothermal treatment at 100° C. for 24 hours, and drying of the obtained product at 100° C. for 2 hours to obtain polymer nanospheres. In a tube furnace, under the protection of inert gas, the polymer nanospheres were heated to 1000 °C for carbonization at a heating rate of 10 °C / min, and finally the temperature was naturally coole...

Embodiment 3

[0017] Measure according to the mass ratio of phloroglucinol: terephthalaldehyde: water = 1:0.8:320, and mix well. Under the stirring speed of 600 rpm, react at 70° C. for 30 minutes, and cool to room temperature to obtain a phenolic prepolymer solution. Then measure according to the mass ratio of resorcinol:formaldehyde solution:ammonia water=1:1.6:0.42, and mix evenly. The mixed solution was slowly added dropwise to the phenolic prepolymer solution, wherein the mass ratio of the mixed solution to the phenolic prepolymer solution was 1:43, and after the addition was completed, it was reacted at a stirring speed of 600 rpm for 24 hours, and then Hydrothermal treatment was performed at 100°C for 24 hours, and the obtained product was dried at 80°C for 8 hours to obtain polymer nanospheres. In a tube furnace, under the protection of inert gas, the polymer nanospheres were heated to 800 °C for carbonization at a heating rate of 5 °C / min, and finally the temperature was naturally...

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Abstract

The invention relates to a preparation method of a porous carbon nanosphere with a controllable diameter. In terms of weight, phloroglucinol, terephthalaldehyde and water are taken in the proportion of 1:0.7-0.9:300-340. A phenolic prepolymer solution is obtained after being reacted for 15 minutes to 12 hours at the stirring speed of 400-1000 revolutions per minute at the temperature of 70 DEG C. In terms of weight, resorcinol, formaldehyde solution and ammonia water are taken in the proportion of 1:1.5-1.8:0.4-0.45, and mixed. A mixed solution is obtained. The mixed solution is added dropwisely into the phenolic prepolymer solution. The mass proportion of the mixed solution and the Phenolic prepolymer solution is 1:40-45. Obtained solution is reacted for 24 hours at the stirring speed of 400-1000 revolutions per minute and undergoes hydro-thermal treatment under the temperature of 100 DEG C, and polymer nanospheres are obtained after an obtained product is dried for 2-12 hours under the temperature of 40-100 DEG C. The polymer nanospheres are protected by inert gas in a tube furnace and heated to 600-1000 DEG C for carbonization at the heating rate of 0.5-10 DEG C per minute. The porous carbon nanaspheres can be obtained when the temperature of the polymer nanospheres naturally lowers to the room temperature. The porous carbon nanosphere is controllable in diameter, good in dispersity, and improtant in application prospect in aspects such as catalysis, environment, energy and biology.

Description

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Claims

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Application Information

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Owner TONGJI UNIV
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