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Preparation method of porous carbon nanomaterial for adsorbing methylene blue

A technology of nanomaterials and methylene blue, which is applied in the field of preparation of porous carbon nanomaterials, can solve the problems of chemical reagent pollution, corrosive equipment, etc., and achieve the effects of short production process, easy raw materials and high yield

Inactive Publication Date: 2016-08-24
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method still has many technical difficulties: such as easy to corrode equipment and easy to produce chemical reagent residues to cause pollution, etc.

Method used

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  • Preparation method of porous carbon nanomaterial for adsorbing methylene blue
  • Preparation method of porous carbon nanomaterial for adsorbing methylene blue
  • Preparation method of porous carbon nanomaterial for adsorbing methylene blue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Synthesis of carbon precursors

[0033] Under the protection of nitrogen, the potassium gluconate was raised to 450 °C at a rate of 5 °C per minute and maintained for 1 h; after the reaction, it was cooled to room temperature, the reaction product was cleaned, and the carbon precursor was obtained after drying.

[0034] Further, washing the reaction product refers to washing the reaction product sequentially with dilute hydrochloric acid, ethanol and water, and the concentration of the dilute hydrochloric acid is 2 mol / L. Drying refers to vacuum drying at 50-60°C.

[0035] (2) Preparation of porous carbon nanomaterials

[0036] Add solid potassium hydroxide to the carbon precursor, and grind to obtain a uniform mixture; under the protection of nitrogen, the above mixture is raised to 850°C at a rate of 5°C per minute and maintained for 1h; after the reaction, cool to room temperature and wash the reaction product , and obtained porous carbon nanomaterials (PCNM) a...

Embodiment 2

[0040] (1) Synthesis of carbon precursors

[0041] Under the protection of nitrogen, the potassium gluconate was raised to 500°C at a rate of 10°C per minute and maintained for 1h; after the reaction, it was cooled to room temperature, the reaction product was cleaned, and the carbon precursor was obtained after drying.

[0042] Further, cleaning the reaction product refers to washing the reaction product sequentially with dilute hydrochloric acid, ethanol and water, the concentration of dilute hydrochloric acid is 2mol / L, and drying refers to vacuum drying at 50-60°C.

[0043] (2) Preparation of porous carbon nanomaterials

[0044] Add solid potassium hydroxide to the carbon precursor, and grind to obtain a uniform mixture; under the protection of nitrogen, the above mixture is raised to 800°C at a rate of 10°C per minute and maintained for 1h; after the reaction, cool to room temperature and wash the reaction product , and obtained porous carbon nanomaterials (PCNM) after d...

Embodiment 3

[0048] (1) Synthesis of carbon precursors

[0049] Under the protection of nitrogen, the potassium gluconate was raised to 500 °C at a rate of 5 °C per minute and maintained for 1 h; after the reaction, it was cooled to room temperature, the reaction product was cleaned, and the carbon precursor was obtained after drying.

[0050] Further, cleaning the reaction product refers to washing the reaction product sequentially with dilute hydrochloric acid, ethanol and water, the concentration of dilute hydrochloric acid is 2mol / L, and drying refers to vacuum drying at 50-60°C.

[0051] (2) Preparation of porous carbon nanomaterials

[0052]Add solid potassium hydroxide to the carbon precursor, and grind to obtain a uniform mixture; under the protection of nitrogen, the above mixture is raised to 850°C at a rate of 5°C per minute and maintained for 1h; after the reaction, cool to room temperature and wash the reaction product , and obtained porous carbon nanomaterials (PCNM) after d...

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Abstract

The invention relates to a preparation method of a porous carbon nanomaterial for adsorbing methylene blue and belongs to the technical field of preparation of environment functional materials. The preparation method comprises steps as follows: firstly, carbonizing potassium gluconate through calcination; then, performing pore production modification on the surface of a carbonized product with potassium hydroxide as an activating agent and removing impurities to obtain the porous carbon nanomaterial. According to the preparation method, potassium gluconate is adopted as a carbon source, and the raw material is easy to obtain, non-toxic and environment friendly; the prepared porous carbon nanomaterial has higher specific surface area and pore volume and can efficiently remove the methylene blue in sewage; compared with a traditional one-step activating method, the preparation method adopts first carbonization and later activation to prepare the material, and the yield is higher; the preparation method is simple, the production process is shorter, the operation is convenient, and popularization is facilitated.

Description

technical field [0001] The invention relates to a preparation method of a porous carbon nanomaterial used for methylene blue adsorption, and belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Methylene blue is a typical highly conjugated cationic organic dye, which is widely used in the manufacture of inks and color lakes, as well as in the dyeing of biological and bacterial tissues. However, methylene blue has certain biological toxicity. It will cause water pollution when it enters the environment, and at the same time, it will transfer and spread among microorganisms and produce toxic effects. The misuse of methylene blue has resulted in unsafe residues in the ecological environment. Scholars at home and abroad have confirmed the existence of methylene blue residues in soil and water environments, which has aroused widespread concern in environmental ecology. Therefore, it is extremely urgent to establish a...

Claims

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Application Information

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IPC IPC(8): C01B31/12B01J20/20B82Y40/00
CPCB01J20/205C01P2004/03C01P2004/04C01P2006/12C01P2006/17
Inventor 孙骏戴江栋谢阿田何劲松李春香闫永胜
Owner JIANGSU UNIV
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