Preparation method and application of lignin-based hierarchical-pore carbon material

A lignin-based, multi-level porous technology is applied in the field of preparation of lignin-based hierarchical porous carbon materials, can solve problems such as environmental impact, environmental pollution, etc., and achieves easy control of operation, abundant sources, and simple and feasible preparation method. Effect

Inactive Publication Date: 2016-11-09
JIANGSU UNIV
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Problems solved by technology

After antibiotics enter the body, a small part undergoes metabolic reactions to generate inactive products, while most of them are excreted in the original form through feces and urine; Higher concentrations of active antibiotics have a strong inhibitory effect on the growth of microorganisms in wastewater biochemical treatment. After biochemical treatment, the residual antibiotics in wastewater cannot be completely degraded, and discharge into the environment will have a certain impact on the environment. ; These two forms seriously pollute the environment

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  • Preparation method and application of lignin-based hierarchical-pore carbon material
  • Preparation method and application of lignin-based hierarchical-pore carbon material
  • Preparation method and application of lignin-based hierarchical-pore carbon material

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Embodiment 1

[0030] Fully mix potassium hydroxide and sodium lignosulfonate according to a certain mass ratio, the mass ratios are 0:1, 1:1, 2:1, 3:1 and 4:1, and then add it into the nickel pot, under nitrogen protection Under the conditions of carbonization and activation in a tube furnace, the temperature is 850°C, the heating rate is 5°C / min, and the temperature is maintained for 1h. Activated product with 0.5mol L -1 Soak in hydrochloric acid to remove impurities, vacuum filter, wash with deionized water until neutral, and dry to obtain lignin-based hierarchical porous carbon materials, which are sequentially marked as LHPC-0, LHPC-1, LHPC-2, LHPC-3, LHPC- 4.

[0031] Table 1 shows the pore structure parameters of LHPC-x. S of LHPC-1, LHPC-2, LHPC-3 and LHPC-4 BET 1759, 2001, 2235 and 1876m respectively 2 g -1 . As the amount of KOH increases, the specific surface area of ​​the carbon material LHPC increases significantly, but the specific surface area of ​​LHPC-4 decreases inst...

Embodiment 2

[0041] Fully mix potassium hydroxide and sodium lignosulfonate according to a certain mass ratio, the mass ratios are 0:1, 1:1, 2:1, 3:1 and 4:1, and then add it into the nickel pot, under nitrogen protection Under the conditions of carbonization and activation in a tube furnace, the temperature is 850°C, the heating rate is 3°C / min, and the temperature is maintained for 1h. Activated product with 1mol L -1 Soak in hydrochloric acid to remove impurities, vacuum filter, wash with deionized water until neutral, and dry to obtain lignin-based hierarchical porous carbon materials, which are sequentially marked as LHPC-0, LHPC-1, LHPC-2, LHPC-3, LHPC- 4.

Embodiment 3

[0043] Fully mix potassium hydroxide and sodium lignosulfonate according to a certain mass ratio, the mass ratios are 0:1, 1:1, 2:1, 3:1 and 4:1, and then add it into the nickel pot, under nitrogen protection Under the conditions of carbonization and activation in a tube furnace, the temperature is 850°C, the heating rate is 7°C / min, and the temperature is maintained for 1h. Activated product with 1.2mol L -1 Soak in hydrochloric acid to remove impurities, vacuum filter, wash with deionized water until neutral, and dry to obtain lignin-based hierarchical porous carbon materials, which are sequentially marked as LHPC-0, LHPC-1, LHPC-2, LHPC-3, LHPC- 4.

[0044] 2. In order to clarify the technical scheme and technical purpose of the present invention, the present invention will be further described below in conjunction with specific implementation examples:

[0045] In the present invention, the adsorption performance evaluation in the specific embodiment is carried out accor...

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Abstract

The invention provides a preparation method and application of a lignin-based hierarchical-pore carbon material. The preparation method comprises the following steps: step 1, activating potassium hydroxide: uniformly mixing potassium hydroxide with carbon precursor so as to obtain a mixture of the carbon precursor and potassium hydroxide and subjecting the mixture of the carbon precursor and potassium hydroxide to carbonization and activation in a tubular furnace under the protection of inert gas; and step 2, soaking an activation product obtained in the step 1 in hydrochloric acid to remove impurities, carrying out vacuum pumping filtration, then washing obtained filtrate with water until the filtrate is neutral and carrying out drying so as to obtain the lignin-based hierarchical-pore carbon material. The prepared lignin-based hierarchical-pore carbon material has a great specific surface area, high adsorption capacity, fast adsorption rate, stable performance and good reusability.

Description

technical field [0001] The invention relates to a preparation method and application of a lignin-based hierarchical porous carbon material, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Sulfonamides are broad-spectrum antibacterial agents. It can be used as an antibacterial agent and feed additive to prevent and treat the infection of staphylococcus and hemolytic streptococcus, and mainly treat fowl cholera, fowl typhoid, chicken coccidiosis and other diseases. After antibiotics enter the body, a small part undergoes metabolic reactions to generate inactive products, while most of them are excreted in the original form through feces and urine; Higher concentrations of active antibiotics have a strong inhibitory effect on the growth of microorganisms in wastewater biochemical treatment. After biochemical treatment, the residual antibiotics in wastewater cannot be completely degraded, and discharge int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
CPCC01P2004/03C01P2004/04C01P2006/12
Inventor 戴江栋张瑞龙何劲松谢阿田常忠帅田苏君周志平闫永胜
Owner JIANGSU UNIV
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