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Method for preparing reduced graphene oxide/nano ferrosoferric oxide composite magnetic adsorbent

A technology of triiron tetroxide and composite magnetism, applied in the directions of alkali metal oxides/hydroxides, chemical instruments and methods, alkali metal compounds, etc., can solve the problem of low reduction efficiency of graphene oxide, unstable composite structure, influence Magnetic responsiveness and other issues, to achieve the effect of improving the reduction effect, good magnetic responsiveness, and improving magnetic responsiveness

Inactive Publication Date: 2017-08-22
JIANGSU TAIZHOU PEOPLES HOSPITAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Preparation of rGO / Fe by Solvothermal Method 3 o 4 It has the advantages of simple operation and easy mastery, but there are problems such as uneven reaction and low reduction efficiency of graphene oxide, resulting in rGO / Fe 3 o 4 The structural instability of the complex affects the magnetic response ability
This defect severely hinders the rGO / Fe 3 o 4 The preparation and application of

Method used

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  • Method for preparing reduced graphene oxide/nano ferrosoferric oxide composite magnetic adsorbent
  • Method for preparing reduced graphene oxide/nano ferrosoferric oxide composite magnetic adsorbent
  • Method for preparing reduced graphene oxide/nano ferrosoferric oxide composite magnetic adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Prepare water / glycol binary solvent ( 25 mL ethylene glycol and 5 mL water) , add 97.5 mg GO, 195 mg ferric chloride hexahydrate (twice the mass of GO), 78 mg sodium citrate, and 597 mg sodium acetate in sequence, stir and mix thoroughly, ultrasonically disperse for 30 minutes, and transfer to the reaction kettle; The reaction kettle was placed in a muffle furnace, the reaction temperature was 180 °C, and the reaction time was 8 hours; after the reaction, the product was fully washed with ultrapure water and ethanol, and vacuum-dried after magnetic separation to obtain rGO / Fe 3 o 4 .

[0031] Carry out VSM test to the prepared product, the result is as follows figure 2 shown. According to the VSM results, rGO / Fe 3 o 4 The saturation magnetic intensity is 9.5 emu / g. The actual magnetic separation experiment results show that rGO / Fe 3 o 4 The time required for complete separation from the aqueous solution was 147 s, and the supernatant was clear after separation. ...

Embodiment 2

[0033] rGO / Fe 3 o 4 The preparation experiment was the same as in Example 1, except that the dosages of ferric chloride hexahydrate, sodium citrate, and sodium acetate changed: 520 mg ferric chloride hexahydrate (5 times the quality of GO), 208 mg sodium citrate, 1592 mg sodium acetate.

[0034] Carry out VSM test to the prepared product, the result is as follows image 3 shown. According to the VSM results, rGO / Fe 3 o 4 The saturation magnetic intensity is 18.9 emu / g. The actual magnetic separation experiment results show that rGO / Fe 3 o 4 The time required for complete separation from the aqueous solution was 70 s, and the supernatant was clear after separation. The above results show that rGO / Fe 3 o 4 The preparation effect is good, rGO / Fe 3 o 4 The structure and performance are stable, and the magnetic response performance is good.

Embodiment 3

[0036] rGO / Fe 3 o 4 The preparation experiment was the same as in Example 1, except that the dosages of ferric chloride hexahydrate, sodium citrate, and sodium acetate changed: 260 mg ferric chloride hexahydrate (2.5 times the mass of GO), 104 mg sodium citrate, 796 mg sodium acetate.

[0037] Carry out VSM test to the prepared product, the result is as follows Figure 4 shown. According to the VSM results, rGO / Fe 3 o 4 The saturation magnetic intensity is 11.8 emu / g. The actual magnetic separation experiment results show that rGO / Fe 3 o 4 The time required for complete separation from the aqueous solution was 75 s, and the supernatant was clear after separation. The above results show that rGO / Fe 3 o 4 The preparation effect is good, rGO / Fe 3 o 4 The structure and performance are stable, and the magnetic response performance is good.

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Abstract

The invention discloses a method for preparing a reduced graphene oxide / nanometer ferrosoferric oxide composite magnetic adsorbent. The method comprises the steps: (1) arranging a reactant system, mixing uniformly to obtain a reactant mixed solution, wherein the reactant system comprises water / an ethylene glycol binary solvent, graphene oxide, ferric chloride hexahydrate, sodium citrate and sodium acetate; (2) preparing the composite magnetic adsorbent by a water / ethylene glycol co-heating method. The invention improves a traditional solvothermal method, and uses a water and ethylene glycol binary solvent heat method, thereby enabling the prepared rGO / Fe3O4 to have good magnetic response ability.

Description

technical field [0001] The invention belongs to the field of preparation of adsorbent materials, in particular to a method for preparing a reduced graphene oxide / nano iron ferric oxide composite magnetic adsorbent. Background technique [0002] Graphene is a novel carbon material with a special two-dimensional structure, which contains rich and novel physical phenomena and exhibits many excellent properties, including electrical, optical, thermal and mechanical properties. Graphene has the potential to revolutionize the field of materials science, scientists believe. The properties of graphene lay the foundation for its wide range of applications, and it is expected to be widely used in high-performance nanoelectronic devices, composite materials, field emission materials, gas sensors, and energy storage. [0003] Reduced graphene oxide (rGO) is one of the main derivatives of graphene, which refers to a two-dimensional carbon material obtained by incompletely removing the o...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/20B01J20/06B01J20/28009
Inventor 葛红山林振坤金春燕钱华苏宇齐金霞
Owner JIANGSU TAIZHOU PEOPLES HOSPITAL
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