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Magnetic cellulose/graphene oxide composite adsorbent and preparation method thereof

A graphene composite, cellulose technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of centrifugal filtration, complicated processes, etc. for separation, and achieve easy recovery and recycling. The effect of using, simple equipment

Inactive Publication Date: 2014-12-24
TIANJIN LISHUN PLASTIC PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese invention patent with the application number of 201110354746.9 discloses a cellulose / graphene oxide composite material, which is prepared by mixing the graphene oxide suspension with an alkaline solution of cellulose, and using mechanical stirring, shearing or ultrasonic waves. , so that graphene oxide and cellulose form a composite structure, but the separation after adsorption must use centrifugal filtration and other methods, the process is more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, prepare an aqueous solution with a ratio of 10.0wt% sodium hydroxide / 8.0wt% thiourea / 6.0wt% urea, and pre-cool it to -10° C. through an ice-salt bath. Then put the cellulose into the solution and stir at 10,000 rpm / min for 10 minutes to obtain a transparent cellulose solution. The product was then centrifuged at 8,000 rpm for 10 min to remove insoluble matter and air bubbles.

[0019] Next, ultrasonically disperse the mixture of 2.0 g ferric oxide nanoparticles and 0.25 g graphene oxide, add it into 5.0 g cellulose solution, and continue mechanical stirring for 1 hour. After the stirring was stopped, the resulting suspension was poured into a sodium chloride (15 wt %) coagulation bath while vigorously stirring. The obtained product continued to stir and age for 12 hours, then slowly added 5 mL of epichlorohydrin for cross-linking, then raised the temperature to 70°C, and continued to stir for 150 min to obtain a magnetic cellulose / graphene oxide composite materi...

Embodiment 2

[0021] First, prepare an aqueous solution with a ratio of 10.0wt% sodium hydroxide / 8.0wt% thiourea / 6.0wt% urea, and pre-cool it to -10° C. through an ice-salt bath. Then put the cellulose into the solution and stir at 10,000 rpm / min for 10 minutes to obtain a transparent cellulose solution. The product was then centrifuged at 8,000 rpm for 10 min to remove insoluble matter and air bubbles.

[0022] Next, ultrasonically disperse the mixture of 4.0 g ferric oxide nanoparticles and 0.4 g graphene oxide, add it into 10.0 g cellulose solution, and continue mechanical stirring for 1 hour. After the stirring was stopped, the resulting suspension was poured into a sodium chloride (15 wt %) coagulation bath while vigorously stirring. The obtained product continued to stir and age for 12 hours, then slowly added 5 mL of epichlorohydrin for cross-linking, then raised the temperature to 70°C, and continued to stir for 150 min to obtain a magnetic cellulose / graphene oxide composite materi...

Embodiment 3

[0024] First, prepare an aqueous solution with a ratio of 10.0wt% sodium hydroxide / 8.0wt% thiourea / 6.0wt% urea, and pre-cool it to -10° C. through an ice-salt bath. Then put the cellulose into the solution and stir at 10,000 rpm / min for 10 minutes to obtain a transparent cellulose solution. The product was then centrifuged at 8,000 rpm for 10 min to remove insoluble matter and air bubbles.

[0025] Next, ultrasonically disperse the mixture of 2.0 g ferric oxide nanoparticles and 0.5 g graphene oxide, add it into 5.0 g cellulose solution, and continue mechanical stirring for 1 hour. After the stirring was stopped, the resulting suspension was poured into a sodium chloride (15 wt %) coagulation bath while vigorously stirring. The obtained product continued to stir and age for 12 hours, then slowly added 5mL epichlorohydrin for crosslinking, then raised the temperature to 70°C, and continued to stir for 150min to obtain a magnetic cellulose / graphene oxide composite material. Th...

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Abstract

The invention relates to a composite adsorption material applied to the fields of sewage treatment, environmental governance and the like, and in particular relates to a magnetic cellulose / graphene oxide composite adsorbent and a preparation method thereof. The magnetic cellulose / graphene oxide composite adsorbent is prepared by mixing cellulose, graphene oxide and Fe3O4 nanoparticles, and has the advantages of convenience in recycling after absorbing, simple equipment, low cost, easiness in industrialization and the like, thus being applied to the fields of sewage treatment, environmental governance and the like.

Description

Technical field: [0001] The invention relates to a composite adsorption material applied in the fields of sewage treatment, environmental treatment, etc., in particular to a magnetic cellulose / graphene oxide composite adsorbent and a preparation method thereof. Background technique: [0002] Cellulose is a renewable polysaccharide that widely exists in nature. In recent years, there have been many reports on cellulose microbeads, cellulose films and cellulose resins made of natural cellulose, and have been applied to heavy metals. In the adsorption of ionic and harmful azo dyes. The high adsorption enthalpy of dye molecules makes the aromatic core more accessible to the cellulose surface. [0003] Graphene oxide is a product that is peeled off from graphite through chemical oxidation. The structure of graphene oxide is similar to graphene, but because it is obtained through chemical oxidation, the surface contains a large number of oxygen-containing functional groups, such ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 窦华利
Owner TIANJIN LISHUN PLASTIC PRODS
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