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Chinese chestnut shaped ferric oxide shell structure magnetic absorbent particle and preparation method thereof

A magnetic adsorbent, core-shell structure technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve problems such as no removal, cumbersome processes, etc., and achieve a simple synthesis method and wide application prospects , the effect of strong adsorption capacity

Inactive Publication Date: 2011-08-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the preparation of the adsorbent needs to be processed in four steps, the process is cumbersome, and it does not involve As in water. 5+ removal of

Method used

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  • Chinese chestnut shaped ferric oxide shell structure magnetic absorbent particle and preparation method thereof
  • Chinese chestnut shaped ferric oxide shell structure magnetic absorbent particle and preparation method thereof
  • Chinese chestnut shaped ferric oxide shell structure magnetic absorbent particle and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A chestnut-shaped iron oxide core-shell magnetic adsorbent particle (or magnetic Fe 2 o 3 The preparation method of amorphous core / γ-phase shell hierarchical structure adsorbent particle) comprises the steps of: 0.20mmol SnCl 2 2H 2 O and 0.50 mL Fe(CO) 5 were added to 80mL N,N-dimethylformamide (DMF), in the air, using magnetic force to stir vigorously for 30min to obtain a solution; then the obtained solution was added to a 100mL autoclave, and heated Heated at high temperature for 8 hours, then cooled to room temperature in air; collected brown precipitate, washed and dried in vacuum at 40°C for 8 hours to obtain a chestnut-shaped iron oxide core-shell magnetic adsorbent particle (or magnetic Fe 2 o 3 Amorphous core / γ-phase shell hierarchical structure adsorbent particles, ie product).

[0022] The obtained chestnut-shaped iron oxide core-shell structure magnetic adsorbent particle has a chestnut-like microscopic appearance, a porous structure formed by the aggr...

Embodiment 2

[0035] Adjust the temperature in Example 1 to 180°C (that is, heating at 200°C is changed to heating at 180°C), repeat the steps in Example 1 above to obtain the product, and use a field emission scanning electron microscope (SEM, S-4800, Hitachi Co., Ltd., Japan) characterize the structure and morphology of the product, such as Figure 4 As shown in A and B, it shows that the obtained product is iron oxide hierarchical structure. The obtained product was subjected to the same adsorption performance test as in Example 1: the results showed that the obtained product had a strong adsorption capacity for heavy metal ions in water.

Embodiment 3

[0037] With 0.20mmol SnCl in embodiment 1 2 2H 2 O is replaced by 0.10mL volume fraction of 38% hydrochloric acid (1.2mmol), repeat the steps of Example 1 above to obtain the product, and use a field emission scanning electron microscope (SEM, S-4800, Hitachi Co., Ltd., Japan) to Characterize the structure and morphology of the product, such as Figure 5 As shown in A and B, it shows that the obtained product is iron oxide hierarchical structure. The obtained product was subjected to the same adsorption performance test as in Example 1: the results showed that the obtained product had a strong adsorption capacity for heavy metal ions in water.

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Abstract

The invention relates to a Chinese chestnut shaped ferric oxide shell structure magnetic absorbent particle as a water treatment agent for absorbing high-toxicity heavy metal ions and a preparation method thereof. The Chinese chestnut shaped ferric oxide shell structure magnetic absorbent particle is characterized in that the inside is of a porous structure formed by amorphous ferric oxide nano particles, and a shell is formed in a manner that a plurality of crystallized maghemite nano bars vertical grow on the amorphous ferric oxide nano particles. The preparation method comprises the steps of: mixing chloride, Fe(CO)5 and N,N-dimethylformamide according to the proportion of (0.01-1.6)mmol:0.50mL:(10-160)mL, and stirring to obtain a solution; and transferring the solution to an agitated reactor, heating at a temperature of 160-220 DEG C for 1-32h, and cooling to room temperature; collecting a brown settlement, cleaning and drying in vacuum to obtain the Chinese chestnut shaped ferric oxide shell structure magnetic absorbent particle. The invention has the advantages of simple synthesis method and mild reaction condition. The Chinese chestnut shaped ferric oxide shell structure magnetic absorbent particle has stronger absorbing capacity to heavy metal ions in water.

Description

technical field [0001] The invention relates to a water treatment agent for adsorbing highly toxic heavy metal ions—chestnut-shaped iron oxide core-shell structure magnetic adsorbent particles and a preparation method thereof. Background technique [0002] Heavy metal ions are considered to be an important source of water pollution due to their high toxicity, and their treatment methods have attracted more and more attention. At present, the main methods for removing heavy metal ions from water are oxidation, precipitation, ion exchange and adsorption. Among them, the adsorption method is widely used due to the advantages of simple operation, high efficiency and low cost (D. Mohan and C.U. Pittman, J. Hazard. Mater., 2007, 142, 1.). [0003] Iron oxides, such as α-Fe 2 o 3 , FeOOH and Fe(OH) 3 As a low-cost and high-efficiency adsorbent, it is widely used in the treatment of polluted water. However, since this iron oxide is mainly used in water treatment in the form of ...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F1/62C02F101/20
Inventor 官建国牟方志许蕾蕾
Owner WUHAN UNIV OF TECH
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