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Low-cost porous carbon microsphere and preparation method thereof

A porous carbon, low-cost technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the cost and preparation process hindering the application and promotion, high yield of difficult porous carbon microspheres, uniform particle size and Less impurities, etc., to achieve the effect of regular structure, low price and high production efficiency

Pending Publication Date: 2021-01-08
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The research work of domestic and foreign scholars mainly focuses on the exploration of the preparation process of porous carbon microspheres. At present, the relatively mature and widely used methods mainly include template method, solvothermal method, self-assembly method, explosion method, and microsphere activation. However, it is difficult for the above method to ensure that the prepared porous carbon microspheres have high yield, good sphericity, uniform particle size and less impurities while taking into account the preparation cost.
In addition, the current method of preparing porous carbon microspheres mainly uses various pitches, tars and other substances as carbon sources, which not only requires high preparation equipment, but also easily causes environmental pollution during the production process
All in all, although porous carbon microspheres are favored by scholars for their excellent performance, the limitations of raw materials, cost and preparation process still hinder their further application and promotion in industry.

Method used

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  • Low-cost porous carbon microsphere and preparation method thereof
  • Low-cost porous carbon microsphere and preparation method thereof
  • Low-cost porous carbon microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The sucrose and aluminum sulfate are weighed together as raw materials according to the mass ratio of 1:1, and water is used as the solvent, and the raw material and the solvent are mechanically stirred according to the mass ratio of 1:4.5 (stirring temperature is 50°C, stirring time is 1h, stirring speed 50 r / min) to make it evenly mixed; after stirring, put the sample in a 60°C oven to dry for 30 hours; put the dried sample in a vacuum drying oven (vacuum degree 1.0×10 5 Pa), heat up to 160°C at a rate of 2°C / min, hold for 3 hours, and cool to room temperature; then put the product in a vacuum furnace (vacuum degree 0.1Pa), heat up to 1500°C at a rate of 10°C / min, Insulate and carbonize for 1 hour, cool to room temperature and take it out; put the carbonized product in 2mol / L hydrochloric acid solution and stir for 5 hours (stirring speed is 50 r / min), filter and separate, and wash the filter residue with deionized water until neutral, then put it at 50℃ After drying ...

Embodiment 2

[0041] Glucose and ferrous sulfate are weighed together as raw materials according to the mass ratio of 2.7:1, and ethanol is used as the solvent, and the raw material and the solvent are mechanically stirred according to the mass ratio of 1:5 (stirring temperature is 30°C, stirring time is 1h, stirring The speed is 200 r / min) to make it evenly mixed; after the stirring, put the sample in an oven at 80°C to dry for 16 hours; put the dried sample in a vacuum drying oven (vacuum degree 1.0×10 3 Pa), heat up to 150°C at a rate of 5°C / min, hold for 3.5 hours, and cool to room temperature; then put the product in a vacuum furnace (vacuum degree 100Pa), and heat up to 1000°C at a rate of 2°C / min, Insulate and carbonize for 3 hours, cool to room temperature and take it out; put the carbonized product in 1mol / L nitric acid solution and stir for 10 hours (stirring speed is 200 r / min), filter and separate, and wash the filter residue with deionized water until neutral, then put it at 80°...

Embodiment 3

[0044] Weigh maltose and aluminum chloride together as raw materials according to the mass ratio of 5:1, use water as the solvent, and mechanically stir the raw material and the solvent according to the mass ratio of 1:3 (stirring temperature is 45°C, stirring time is 2h, stirring The speed is 500 r / min) to make it evenly mixed; after the stirring, put the sample in a 95°C oven to dry for 36 hours; put the dried sample in a vacuum drying oven (vacuum degree 1.0×10 3 Pa), heat up to 165°C at a rate of 25°C / min, hold for 4 hours, and cool to room temperature; then put the product in a vacuum furnace (vacuum degree 80Pa), heat up to 700°C at a rate of 1°C / min, and hold Carbonize for 5 hours, cool to room temperature and take it out; put the carbonized product in 6mol / L hydrochloric acid solution and stir for 4.5 hours (stirring speed is 500 r / min), filter and separate, wash the filter residue with deionized water until neutral, and then put it in 140℃ Dry in an oven for 2 hours t...

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Abstract

The invention discloses a low-cost porous carbon microsphere and a preparation method thereof, and belongs to the field of carbon materials. The preparation method comprises the following steps: stirring and mixing a carbon precursor and an additive which are used as raw materials with a solvent according to a certain ratio, drying, and carrying out phase separation, carbonization, acid pickling and other treatment processes to prepare the porous carbon microspheres with favorable sphericity. The obtained porous carbon microspheres are regular in structure, the specific surface area is 50-300m < 2 > / g, the mesoporous content is 87-98%, the sphere diameter is 1-3 [mu] m, the preparation process is simple, the raw material cost is low, the preparation process is environmentally friendly, and industrial production is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of carbon structural materials, and in particular relates to a preparation method of low-cost porous carbon microspheres. Background technique [0002] Since the accidental discovery of carbon microspheres in the process of coke research in the 1960s, they have always attracted the attention of scholars due to their unique structure, excellent physical and chemical properties and high packing density. Carbon microspheres are spherical carbon materials composed of graphite microcrystals surrounded by distribution, and their diameters are usually 0.3~3μm. The main types include solid carbon microspheres, hollow carbon microspheres and porous carbon microspheres. Compared with solid carbon microspheres and hollow carbon microspheres, porous carbon microspheres have the characteristics of porous carbon materials, showing better geochemical stability, intrinsic damping performance, higher specific surface area an...

Claims

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Application Information

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IPC IPC(8): C01B32/205
CPCC01B32/205
Inventor 林起浪陈伯鋆
Owner FUZHOU UNIVERSITY
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