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Amine functionalized mesoporous iron oxyhydroxide and method for fabricating the same

A structure and mesoporous technology, applied in the field of mesoporous FeOx structure and its preparation, can solve the problems of long time required, small pore volume, and uneven pore shape.

Inactive Publication Date: 2013-05-08
KOREA INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small specific surface area and small pore volume of alumina, the amount of arsenic adsorption is small and the pore shape is uneven. Accordingly, it takes a long time to complete saturation.

Method used

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  • Amine functionalized mesoporous iron oxyhydroxide and method for fabricating the same
  • Amine functionalized mesoporous iron oxyhydroxide and method for fabricating the same
  • Amine functionalized mesoporous iron oxyhydroxide and method for fabricating the same

Examples

Experimental program
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Effect test

Embodiment 1

[0024] x >

[0025] Mix 200ml of 0.20M FeCl 2 and 45ml of 0.08M sodium dodecylsulfate (SDS, sodium dodecylsulfate) and then stirred for 6 hours. Next, in FeCl 2 Add 50ml of 0.3M H 2 o 2 The solution was reacted and stirred (stirring) for about 1 hour or so. The above-mentioned sodium dodecyl sulfate (SDS, sodium dodecylsulfate) is a surfactant, and the above-mentioned H 2 o 2 solution for the oxidation of FeCl 2 of oxidants.

[0026] Then, the kneaded solution was subjected to solid-liquid separation using a centrifugal separator (3000 rpm, 15 minutes). After washing the separated solid substance three times with distilled water, centrifugation was performed again to separate the liquid substance. The finally separated solid matter was dried in an oven at 100 °C for about 4 hours to prepare FeO with a light bronze-colored mesoporous structure. x powder (mesoporous FeO x structure).

[0027] Next, inject the prepared mesoporous FeO into the flask containing anhydrou...

Embodiment 2

[0030] x Material properties>

[0031] The mesoporous FeO with amine groups prepared in Example 1 was confirmed by XRD analysis and TEM analysis x The material properties of the structure. refer to figure 2 The XRD chart can confirm that FeO x Peaks and amine peaks are well defined, by image 3 The TEM photo can confirm the mesoporous structure of FeO with amine groups x .

Embodiment 3

[0032]

[0033] Implemented the mesoporous FeO with amine group prepared by Example 1 x Arsenic adsorption experiments on structures. The experimental method and experimental results are as follows.

[0034] Aqueous solutions of copper, cadmium, lead, and arsenic were prepared at a concentration of 10 mg / L in a 50 ml Teflon-made conical tube. Then, after measuring the concentration of each heavy metal aqueous solution with an ion chromatography (IC, ion chromatography), it was confirmed whether it conformed to the experimental concentration.

[0035] Next, the mesoporous FeO with amine groups prepared in Example 1 was injected into each heavy metal aqueous solution. x Structure 0.05g. The heavy metal adsorption performance was determined after stirring for 6 hours. At this time, for comparison, under the same conditions, mesoporous FeO without amine groups was also injected into the heavy metal aqueous solution. x The structure was then stirred. The mesoporous FeO with...

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Abstract

The present invention relates to an amine functionalized mesoporous iron oxyhydroxide and a method for fabricating the same, wherein the amine functionalized mesoporous iron oxyhydroxide is provided with amino group with high reactivity with anion heavy metal on the FeOx surface with large special area, thereby effectively removing the anion heavy metal in water. The method for fabricating mesoporous FeOx structure with amino group according to one embodiment of the invention is characterized by comprising the following steps: a first step, mixing water solution of ferric chloride (FeCl12) and surfactant; a second step, mixing peroxide in the water solution of water solution of ferric chloride and surfactant; a third step, after performing centrifugal separation on the mixture solution of the second step, drying the solid matter for fabricating powder-shaped mesoporous FeOx structure; and a fourth step, after dispersing the mesoporous FeOx structure into anhydrous toluene, injecting aminosilane for causing reaction between the aminosilane and the mesoporous FeOx structure, thereby generating amino groups on the surface of the mesoporous FeOx structure.

Description

technical field [0001] The invention relates to a mesoporous iron oxide (FeO x ) structure and its preparation method (Amine functionalized mesoporous iron oxides and method for fabricating the same). More specifically related to FeO with large specific surface area x Mesoporous FeO with amine groups on the surface has highly reactive amine groups with negative ion heavy metals, which can effectively remove negative ion heavy metals in water x Structures and methods for their preparation. Background technique [0002] Wastewater contains a variety of heavy metals other than organic matter. Since such heavy metals cannot be removed by ordinary biological wastewater treatment methods, a method of using adsorbents to remove them is disclosed. [0003] At present, research on adsorbents for attaching and removing inorganic substances such as heavy metals is being actively carried out. Representative examples include the following: a method for removing divalent heavy metals s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F1/62
CPCC01G49/04C01P2006/12
Inventor 李相协郑承建崔在佑洪锡垣
Owner KOREA INST OF SCI & TECH
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