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Method for preparing magnetic activated carbon from sugar solution

A technology of magnetic activated carbon and sugar solution, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of uneven distribution of magnetic particles, easy loss of magnetic particles, narrow application range, etc., and achieve high utilization rate of raw materials , easy to separate, no iron source loss effect

Inactive Publication Date: 2021-05-07
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The magnetic composite materials prepared by these two methods have disadvantages such as uneven distribution of magnetic particles, poor stability, easy loss of magnetic particles, and narrow application range.

Method used

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  • Method for preparing magnetic activated carbon from sugar solution
  • Method for preparing magnetic activated carbon from sugar solution
  • Method for preparing magnetic activated carbon from sugar solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of hydrothermal precursor:

[0026] Add 20g of glucose, 4g of ferrous sulfate, and 4g of sodium polyacrylate to 100mL of water in sequence, stir thoroughly for 4 hours, put it into a 500mL reaction kettle, place it in a 180°C oven for 12 hours, cool down naturally, filter the obtained solid, wash with water, and dry Afterwards, a hydrothermal precursor is obtained. Using an inductively coupled plasma spectrometer to detect the concentration of iron ions in the cleaning wastewater, it is known that the iron loading rate in the hydrothermal carbon spheres is greater than 99%. The microstructural characterization of the obtained hydrothermal precursors was carried out as follows: figure 1 shown by figure 1 It can be seen that the hydrothermal precursor is a carbon sphere with uniform appearance and good dispersion, the surface is smooth and non-porous, and the size of the carbon sphere is 5-10 μm.

[0027] (2) Under the protection of an inert gas, put th...

Embodiment 2

[0031] (1) Preparation of hydrothermal precursor:

[0032] Add 50g of glucose, 5g of ferrous sulfate, and 10g of sodium polyacrylate to 100mL of water in sequence, stir well for 12 hours, put it into a 500mL reaction kettle, place it in a 160°C oven for 12 hours, cool down naturally, filter the obtained solid, wash with water, and dry Afterwards, a hydrothermal precursor is obtained.

[0033] (2) Under the protection of an inert gas, put the obtained precursor into a 900°C muffle furnace for calcination, the heating rate is 20°C / min, the holding time is 1h, and the magnetic activated carbon is obtained by natural cooling after the reaction.

[0034] After testing, the specific surface area of ​​magnetic activated carbon is 825m 2 / g, the iron loading rate is 98%.

Embodiment 3

[0036] (1) Preparation of hydrothermal precursor:

[0037] Add 5g of glucose, 5g of ferrous sulfate, and 5g of sodium polyacrylate to 100mL of water in sequence, stir thoroughly for 6 hours, put it into a 500mL reaction kettle, place it in an oven at 220°C for 6 hours, let it cool down naturally, filter the obtained solid, wash it with water, and dry it Afterwards, a hydrothermal precursor is obtained.

[0038] (2) Under the protection of an inert gas, put the obtained precursor into a 500°C muffle furnace for calcination, the heating rate is 1°C / min, and the holding time is 12h. After the reaction, it is cooled naturally to obtain magnetic activated carbon.

[0039] After testing, the specific surface area of ​​magnetic activated carbon is 802m 2 / g, the iron loading rate is 99%.

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Abstract

The invention discloses a method for preparing magnetic activated carbon from a sugar solution, and belongs to the technical field of activated carbon preparation. The invention aims to overcome the defects of non-uniform distribution of magnetic particles, poor stability, easy loss of magnetic particles, narrow application range and the like of the existing magnetic composite material. The preparation method comprises the following steps: uniformly mixing and stirring a sugar solution, an iron source and sodium polyacrylate, putting the mixture into a high-temperature reaction kettle, carrying out a hydrothermal reaction to generate a hydrothermal precursor, and carrying out pyrolysis under the protection of inert gas to generate the magnetic activated carbon. The method has the advantages of high utilization rate of raw materials, large specific surface area of activated carbon, simplicity in operation, low cost and the like, and the synthesized magnetic activated carbon has relatively strong adsorption capacity on pollutants and can be magnetically recycled.

Description

technical field [0001] The invention relates to a method for preparing magnetic activated carbon from sugar solution, which belongs to the technical field of activated carbon preparation. Background technique [0002] In recent years, water pollution has become one of the most serious environmental problems worldwide, which must be controlled and alleviated. Activated carbon is currently the most widely used and efficient adsorbent in water treatment for the removal of heavy metal ions and organic toxic species in water. The main reason is that activated carbon has a large specific surface area, well-developed pore structure, and abundant surface functional groups, which can be combined with organic matter and metal ions through van der Waals force, hydrogen bond, and π-π interaction to adsorb and remove pollutants in water. However, when powdered activated carbon is used to adsorb pollutants in water, due to the extremely small particle size of activated carbon, a high-per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318
CPCC01B32/318
Inventor 张显龙冯德鑫咸漠
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI