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Method for preparing carbon cage with ultrahigh dye adsorption performance by utilizing different surfactants

A surfactant and adsorption performance technology, which is applied in the field of preparing carbon cages with ultra-high dye adsorption performance, can solve problems such as weak dye adsorption performance, and achieve the effect of increasing specific surface area and improving adsorption performance.

Active Publication Date: 2020-12-18
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing carbon material adsorbents have weak adsorption capacity for dyes, so it is of great significance to provide a synthetic method of HPCM with high dye adsorption performance.

Method used

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  • Method for preparing carbon cage with ultrahigh dye adsorption performance by utilizing different surfactants
  • Method for preparing carbon cage with ultrahigh dye adsorption performance by utilizing different surfactants
  • Method for preparing carbon cage with ultrahigh dye adsorption performance by utilizing different surfactants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Take 10g of tar in a beaker, add 400mL of water, then add 5g of sodium dodecylbenzenesulfonate (SDBS), place it on an electronic stirrer and stir at 600r / min for 1 hour, then filter and separate to obtain completely emulsified Tar emulsion, then add 10g of hydrophilic 15nm nano-silica, place it on an electronic stirrer and stir at 500r / min for 1 hour, then separate the solid and liquid products by suction filtration, and put the solid in an oven at 80°C to dry (24h left and right, the same below).

[0055] (2) Grind the above-mentioned dried samples into powder, put them into a quartz tube, place them in an atmosphere furnace at 800°C, and carbonize for 1 hour at a heating rate of 2.5°C / min, using pure nitrogen as a protective atmosphere.

[0056] (3) get the sample after carbonization in polytetrafluoroethylene cup, with carbon (i.e. sample after carbonization): the mass ratio of hydrofluoric acid solution=1:5 adds excessive concentration and is the hydrofluoric ac...

Embodiment 2

[0058] (1) Take 10g of tar in a beaker, add 400mL of water, then add 5g of sodium dodecylbenzenesulfonate (SDBS), place it on an electronic stirrer and stir at 600r / min for 1 hour, then filter and separate to obtain completely emulsified Tar emulsion, then add 10g of hydrophilic 15nm nano-silicon dioxide, place it on an electronic stirrer and stir at 500r / min for 1 hour, then separate the solid and liquid products by suction filtration, and put the solid in an oven at 80°C for drying.

[0059] (2) Grind the above dried sample finely, add concentrated sulfuric acid (mass fraction 98%) with the mass ratio of sample:concentrated sulfuric acid=1:10, stir evenly and place it for 30min for carbonization, slowly and intermittently add 400ml water to dilute , the solid-liquid product was separated by suction filtration, and the solid was dried in an oven at 80°C.

[0060] (3) Get the carbonized sample in a polytetrafluoroethylene cup, add a hydrofluoric acid solution with a concentrat...

Embodiment 3

[0062] (1) Take 10g of tar in a beaker, add 400mL of water, then add 5g of sodium dodecyl sulfate (SDS), place it on an electronic stirrer and stir at 600r / min for 1 hour, then filter and separate to obtain completely emulsified tar emulsification Then add 10g of hydrophilic 15nm nano silicon dioxide, place it on an electronic stirrer and stir at 500r / min for 1 hour, then separate the solid and liquid products by suction filtration, and put the solid in an oven at 80°C for drying.

[0063] (2) Grind the above-mentioned dried samples into powder, put them into a quartz tube, and place them in an atmosphere furnace at 800° C. at a rate of 2.5° C. / min. Carbonize for 1 hour with pure nitrogen as the protective atmosphere.

[0064] (3) Get the carbonized sample in a polytetrafluoroethylene cup, add an excess concentration of hydrofluoric acid solution that is 40% by mass at a mass ratio of carbon:hydrofluoric acid solution=1:5, and place it on an electronic stirrer After stirring ...

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Abstract

The invention discloses a method for preparing a carbon cage with an ultrahigh dye adsorption performance by using different surfactants. The method comprises the following steps: (1) adding tar intowater, adding a surfactant, stirring to emulsify and filter to obtain tar emulsion, then adding nano silicon dioxide, continuously stirring, carrying out solid-liquid separation, taking solid, and drying to obtain a carbon material; (2) grinding the carbon material into powder, and performing carbonization treatment in a high-temperature carbonization or concentrated sulfuric acid carbonization manner to obtain a carbonized material; and finally, adding a hydrofluoric acid solution into the carbonized material, stirring, carrying out solid-liquid separation, taking the solid, and drying to obtain the carbon cage with an ultrahigh dye adsorption performance. According to the preparation method, the surfactant plays roles in permeation, adsorption and wetting in the solution to change the surface of the porous carbon cage, so that the specific surface area of the porous carbon cage can be remarkably increased, and the adsorption performance of the porous carbon cage to the dye can be effectively improved.

Description

technical field [0001] The invention belongs to the field of carbon materials, in particular to a method for preparing a carbon cage with superhigh dye adsorption performance by using different surfactants. Background technique [0002] Dyestuffs are common components of wastewater discharged by various industries including paper, plastics, food, cosmetics and textiles. The presence of low concentrations of dyes in wastewater is highly visible, reducing light penetration and potentially inhibiting photosynthesis. Problems can also arise if dyes are anaerobically decomposed in sediments, such as the production of toxic amines, which can reach lethal levels affecting aquatic systems and associated flora and fauna. [0003] To effectively remove dyes from aquatic systems, many techniques have been explored, such as filtration, flocculation, adsorption, oxidation and biodegradation. Among them, adsorption is considered to be the most practical and economical method, so the key...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/22B01J20/20B01J20/28021C02F1/283C02F1/285C02F2101/308
Inventor 许细薇张帆涂任蒋恩臣孙炎吴宇健范旭东
Owner SOUTH CHINA AGRI UNIV