Preparation method for nano-carbon material having graphene-like structure

A nanocarbon material, graphene technology, applied in nanocarbon, nanotechnology for materials and surface science, nanotechnology, etc.

Inactive Publication Date: 2013-04-24
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the treatment of dye / printing and dyeing wastewater, the comprehensive application cost of bentonite is much lower than that of activated carbon, but to realize the popularization and application of bentonite in dye / printing and dyeing wastewater, it is necessary to solve the problem of resource utilization of bentonite after dye adsorption

Method used

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  • Preparation method for nano-carbon material having graphene-like structure
  • Preparation method for nano-carbon material having graphene-like structure

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Experimental program
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Effect test

Embodiment 1

[0022] A preparation method of a graphene-like nano-carbon material, comprising the following steps:

[0023] 1) Put 2g of bentonite into 5 L of wastewater containing crystal violet at a concentration of 200 mg / L, absorb for 1 hour and then settle for 2 hours, and the wastewater becomes clear;

[0024] 2) Dry and pulverize the precipitated waste bentonite, then place it in a muffle furnace, raise the temperature to 600°C for 2 hours under the protection of nitrogen, and then use hydrofluoric acid with a volume concentration of 10%, hydrochloric acid with a volume concentration of 10% Alternately washing 4 times, each washing time is 4 h, and the amount of acid is 40 mL; after the product is dried, a graphene-like structure nano-carbon material is obtained.

[0025] The XRD characterization results show that ( figure 1 ), the distance between the bottom surfaces of bentonite before and after carbonization was 1.52 nm and 1.32 nm, respectively; since the thickness of the benton...

Embodiment 2

[0027] A preparation method of a graphene-like nano-carbon material, comprising the following steps:

[0028] 1) Put 2g of bentonite into 5 L of wastewater containing methylene blue at a concentration of 200 mg / L, and after 1 hour of adsorption, precipitate for 2 hours, and the wastewater becomes clear;

[0029] 2) Separate, dry, and pulverize the above bentonite that has absorbed the cationic dye methylene blue, and then place it in a muffle furnace and heat it up to 600°C for 3 hours under the protection of nitrogen. Fluoric acid and hydrochloric acid with a volume concentration of 12% were washed 4 times alternately, each washing time was 3 h, and the acid dosage was 30 mL. The product is dried to obtain a nano-carbon material with a graphene-like structure.

[0030] The results of XRD characterization showed that the distance between the bottom surfaces of bentonite after carbonization was 1.33 nm; after acid washing, a nano-carbon material with a graphene-like structure ...

Embodiment 3

[0032] A preparation method of a graphene-like nano-carbon material, comprising the following steps:

[0033] 1) Put 2g of bentonite into 5 L of wastewater containing crystal violet at a concentration of 250 mg / L, absorb for 1 hour and then settle for 2 hours, and the wastewater becomes clear;

[0034] 2) Dry and pulverize the precipitated waste bentonite, then place it in a muffle furnace, heat up to 500°C for 5 hours under nitrogen protection, and carbonize the bentonite after carbonization with hydrofluoric acid with a volume concentration of 20% and a volume concentration of 6 % hydrochloric acid alternately washed 3 times, each washing time was 4 h, the acid dosage was 30 mL, and dried to obtain a graphene-like structure nano-carbon material.

[0035] The XRD characterization results show that the distance between the bottom surfaces of the carbonized bentonite is 1.32 nm; the product after acid washing has the structural characteristics of graphene, and the Raman spectru...

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Abstract

The present invention discloses a preparation method for a nano-carbon material having a graphene-like structure. The preparation method comprises: sequentially performing drying, grinding, carbonizing, acidification washing, and drying to bentonite with dyes adsorbed therein to obtain the nano-carbon material having graphene-like structure. In the present invention, waste bentonite is used as a raw material, and a novel nano layered carbon material having a large specific surface area is prepared via a simple method; and at the same time, a new way for resource recovery and utilization of bentonite with dyes adsorbed therein is provided, thus achieving resource utilization of bentonite after being used for wastewater treatment after, and helping to promote the applications of the bentonite in dye / printing and dyeing wastewater treatment.

Description

technical field [0001] The invention relates to a novel nano-layered carbon material, in particular to a preparation method of a graphene-like structure nano-carbon material. Background technique [0002] Bentonite is a clay rock with Montmorillonite as the main mineral. The structural feature of montmorillonite is a layered aluminosilicate mineral with a two-dimensional nanostructure, which is composed of two silicon-oxygen tetrahedrons sandwiching an aluminum (magnesium) oxygen (hydrogen oxygen) octahedron. Due to isomorphic substitution, montmorillonite produces permanent negative charge due to unequal cation replacement between layers, which can achieve charge balance by adsorbing cations in its interlayer domain, and montmorillonite has a large internal and external area, Therefore, bentonite can adsorb various organic and inorganic cations through ion exchange, and has high ion exchange capacity and strong adsorption energy. [0003] Due to the rich mineral resources...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/15
Inventor 朱润良陈情泽周青朱建喜何宏平
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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