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Magnetic graphene oxide/sodium alginate/sodium carboxymethyl cellulose composite material and preparation method thereof

A technology of sodium carboxymethylcellulose and sodium alginate, applied in chemical instruments and methods, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problems of reducing adsorption rate, limiting contact efficiency, etc. Good mechanical strength, large specific surface area, stable properties

Inactive Publication Date: 2020-04-21
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Compared with dispersed adsorbents, graphene / organic composite adsorbents have the advantage of easy separation and regeneration, but the existence of macroscopic bodies also limits their contact efficiency with pollutants in water and reduces the adsorption rate.

Method used

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  • Magnetic graphene oxide/sodium alginate/sodium carboxymethyl cellulose composite material and preparation method thereof
  • Magnetic graphene oxide/sodium alginate/sodium carboxymethyl cellulose composite material and preparation method thereof
  • Magnetic graphene oxide/sodium alginate/sodium carboxymethyl cellulose composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0053] (1) Preparation of magnetic graphene oxide: 1.0 g of synthesized graphene oxide was ultrasonically dispersed in 100 mL of ultrapure water. Under nitrogen protection, 1.3gFeCl 3 , 0.5g FeCl 2 (2:1 molar ratio) was dissolved in 100mL ultrapure water, and 25% ammonia water was quickly added to pH=10. The mixture was stirred at high temperature for 1 h. Cool to room temperature, wash with ultrapure water and absolute ethanol three times, and dry in vacuum for 12 hours.

[0054] (2) Preparation of magnetic graphene oxide / sodium alginate / sodium carboxymethyl cellulose: Take 0.3g of magnetic graphene oxide and add it to a beaker containing 100ml of ultrapure water, ultrasonically disperse it for 2 hours, and dissolve 1g of seaweed Add sodium carboxymethyl cellulose and 0.5 g sodium carboxymethyl cellulose to the aqueous solution of magnetic graphene oxide uniformly dispersed by ultrasonic waves, stir at a constant speed for 1 h, drop the mixed solution into 5% calcium chlor...

Embodiment 2

[0057] (1) Preparation of magnetic graphene oxide: 1.0 g of synthesized graphene oxide was ultrasonically dispersed in 100 mL of ultrapure water. Under nitrogen protection, 1.3gFeCl 3 , 0.5g FeCl 2 (2:1 molar ratio) was dissolved in 100mL ultrapure water, and 25% ammonia water was quickly added to pH=10. The mixture was stirred at high temperature for 1 h. Cool to room temperature, wash with ultrapure water and absolute ethanol three times, and dry in vacuum for 12 hours.

[0058] (2) Preparation of magnetic graphene oxide / sodium alginate / sodium carboxymethyl cellulose: Take 0.1 g of magnetic graphene oxide and add it to a beaker containing 100 ml of ultrapure water, ultrasonically disperse it for 2 hours, and dissolve 1 g of seaweed Add sodium carboxymethyl cellulose and 0.5 g sodium carboxymethyl cellulose to the aqueous solution of magnetic graphene oxide uniformly dispersed by ultrasonic waves, stir at a constant speed for 1 h, drop the mixed solution into 5% calcium ch...

Embodiment 3

[0061] (1) Preparation of magnetic graphene oxide: 1.0 g of synthesized graphene oxide was ultrasonically dispersed in 100 mL of ultrapure water. Under nitrogen protection, 1.3gFeCl 3 , 0.5g FeCl 2 (2:1 molar ratio) was dissolved in 100mL ultrapure water, and 25% ammonia water was quickly added to pH=10. The mixture was stirred at high temperature for 1 h. Cool to room temperature, wash with ultrapure water and absolute ethanol three times, and dry in vacuum for 12 hours.

[0062] (2) Preparation of magnetic graphene oxide / sodium alginate / sodium carboxymethyl cellulose: Take 1 g of magnetic graphene oxide and add it to a beaker containing 100 ml of ultrapure water, ultrasonically disperse it for 2 hours, and dissolve 1 g of alginic acid Sodium and 0.5g sodium carboxymethylcellulose were added to the magnetic graphene oxide aqueous solution uniformly dispersed by ultrasonic waves, stirred at a constant speed for 1h, the mixed solution was dropped into 5% calcium chloride sol...

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Abstract

The invention discloses a magnetic graphene oxide / sodium alginate / carboxymethyl cellulose composite material and a preparation method thereof. The method comprises the following steps: preparing magnetic graphene oxide by adopting a chemical coprecipitation method, and preparing the magnetic graphene oxide / sodium carboxymethyl cellulose / sodium alginate composite material from the magnetic grapheneoxide, sodium carboxymethyl cellulose and sodium alginate by adopting an ion exchange method. The composite material provided by the invention contains rich active functional groups, can generate a relatively strong coordination effect with heavy metal ions, improves the adsorption performance of the composite material on the heavy metal ions, has the maximum adsorption capacity of 92.6 mg / g, andis suitable for heavy metal ion adsorption treatment.

Description

technical field [0001] The invention relates to a magnetic graphene oxide / sodium alginate / sodium carboxymethyl cellulose composite material and a preparation method thereof, belonging to the technical field of adsorption material preparation. Background technique [0002] Traditional adsorbents such as activated carbon, resin, and biological adsorbents have small pores. For some macromolecular organic pollutants, the pore blockage effect leads to blockage of the pores and reduces the adsorption capacity. At the same time, this kind of adsorbent has high adsorption cost, poor adsorption effect and low regeneration efficiency, which restrict its further application. [0003] Cellulose, chitosan, sodium alginate, soybean protein, etc. are commonly used organic materials for graphene / natural polymer adsorbents. These natural polymers widely exist in nature, are cheap, have abundant oxygen-containing functional groups on the surface, and have excellent hydrophilicity and biocomp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/24B01J20/28009B01J20/30B01J2220/46C02F1/28C02F2101/20
Inventor 林雪梅徐志尧
Owner NANJING UNIV OF SCI & TECH
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