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Preparation method of easily separated macroscopically ordered graphene nanoadsorbent

A nano-adsorption, graphene technology, applied in nano-technology, chemical instruments and methods, other chemical processes, etc., can solve the problems of inconvenient solid-liquid separation, decrease in specific surface area, graphene agglomeration, etc., and achieve favorable adsorption performance. The effect of easy separation and good adsorption capacity

Inactive Publication Date: 2016-05-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The specific surface area of ​​graphene, a carbon nanomaterial, is as high as 2630m2 / g under ideal conditions, but its application in adsorption still has limitations. First, there are only sp2 hybridized carbon atoms on the surface of graphene, so that it can only absorb Combining pollutants through van der Waals force, so it has a weak effect on heavy metals and other pollutants. Secondly, graphene is prone to agglomeration, resulting in a decrease in its specific surface area. Finally, as a powdery nanomaterial, it is not easy to separate solid-liquid after adsorption.

Method used

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  • Preparation method of easily separated macroscopically ordered graphene nanoadsorbent
  • Preparation method of easily separated macroscopically ordered graphene nanoadsorbent
  • Preparation method of easily separated macroscopically ordered graphene nanoadsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take a beaker, add 0.2g of graphite oxide to 10ml of distilled water and stir well. Add 2.5ml of TPAOH solution (concentration: 10%) into the beaker, stir evenly and let stand for 30min. Add 50ml of cetyltrimethylammonium bromide aqueous solution (concentration is 1%) to the beaker, stir it evenly, place it in a water bath at 80°C for 12h, filter with suction, and filter the filtrate at 60°C Dry for 12h. A macroscopically ordered graphene nanomaterial is obtained.

[0026] Carry out XRD test to the obtained sample, the result is as attached figure 1 shown.

Embodiment 2

[0028] Take a beaker, add 0.2g of graphite oxide to 10ml of distilled water and stir well. Add 2.5ml of TPAOH solution (concentration: 10%) into the beaker, stir evenly and let stand for 30min. Add 100ml of cetyltrimethylammonium bromide aqueous solution (concentration: 1%) to the beaker, stir it evenly, place it in a water bath at 80°C for 12h, filter with suction, and filter the filtrate at 60°C Dry for 12h. A macroscopically ordered graphene nanomaterial is obtained.

[0029] Carry out XRD test to the obtained sample, the result is as attached figure 2 shown.

Embodiment 3

[0031] Take a beaker, add 0.2g of graphite oxide to 10ml of distilled water and stir well. Add 2.5ml of TPAOH solution (concentration: 10%) into the beaker, stir evenly and let stand for 30min. Add 200ml of cetyltrimethylammonium bromide aqueous solution (concentration: 1%) to the beaker, stir it evenly, place it in a water bath at 80°C for 12h, filter with suction, and filter the filtrate under 60°C Dry for 12h. A macroscopically ordered graphene nanomaterial is obtained.

[0032] Carry out XRD test to the obtained sample, the result is as attached image 3 shown.

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Abstract

The invention discloses a preparation method of a macroscopic ordered grapheme nano adsorbing agent easy to separate. The preparation method comprises the following steps: sequentially adding tetrapropylammonium hydroxide and hexadecyl trimethyl ammonium bromide in a graphite oxide solution, stirring to form a uniform solution, standing the mixed solution at a constant temperature of 80 DEG C for 12h, suction-filtering, drying and obtaining the macroscopic ordered grapheme nano absorbing agent easy to separate by virtue of a pre-supporting method. The macroscopic ordered grapheme nano adsorbing agent easy to separate has a macroscopic morphology and a microscopic structure, has a good adsorption characteristic, prevents the phenomenon that a grapheme adsorbing agent with a disordered structure is not easy to separate in the solution, is simple in structure, is excellent in performance, and has a further commercial application.

Description

technical field [0001] The present invention aims at inventing a simple and feasible method for preparing easily separated macroscopically ordered graphene nanomaterials that can be used as adsorbents. Background technique [0002] Adsorption is one of the most concerned water treatment technologies, which has the advantages of easy control and low cost. Currently, commonly used adsorbents include activated carbon, silica gel, alumina, polymers, etc. Due to their large specific surface area, nanomaterials have been extensively studied in adsorption. The specific surface area of ​​graphene, a carbon nanomaterial, is as high as 2630m2 / g under ideal conditions, but its application in adsorption still has limitations. First, there are only sp2 hybridized carbon atoms on the surface of graphene, so that it can only absorb The van der Waals force binds pollutants, so it has a weak effect on heavy metals and other pollutants. Secondly, graphene is prone to agglomeration, resulting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B82Y40/00
Inventor 马杰孙怡然陈君红李晨璐李强杨明轩
Owner TONGJI UNIV