Nanolevel zero-valent iron particle coated with oleic acid-Pluronic and synthetic method thereof

A Pluronic package and Pluronic technology, applied in the field of oleic acid-Pluronic coating of nano-scale zero-valent iron particles and their synthesis, can solve the problems of decreasing specific surface area, affecting reactivity, affecting movement, etc. Easy to operate, reproducible, and simple to synthesize effects

Inactive Publication Date: 2009-10-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-scale zero-valent iron particles are easy to agglomerate, which firstly affects their movement in groundwater, and secondly leads to a decrease in their specific surface area, thereby affecting their reactivity.

Method used

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  • Nanolevel zero-valent iron particle coated with oleic acid-Pluronic and synthetic method thereof
  • Nanolevel zero-valent iron particle coated with oleic acid-Pluronic and synthetic method thereof
  • Nanolevel zero-valent iron particle coated with oleic acid-Pluronic and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Weigh 3.75 grams of FeSO 4 ·7H 2 O and 1.20 g NaBH 4 , were dissolved in 50 ml deoxygenated deionized water, and the NaBH 4 aqueous solution was added dropwise to FeSO 4 ·7H 2 Black nano-sized zero-valent iron particles are generated in the O aqueous solution, and the stirring is continued for 10 minutes, and then the N 2 The nanoscale zero-valent iron particles were washed 3 times with deoxygenated deionized water under certain conditions;

[0019] 2) The nanoscale zero-valent iron particles prepared in step 1) are made into 150 milliliters of suspensions with deoxygenated deionized water, and the pH value is adjusted to 9 with a concentration of 0.5 mol / liter of NaOH aqueous solution, and 0.1 milliliters of oleic acid is added, at 80 Stirring and reacting at ℃ for 0.5 hours, performing solid-liquid separation with a centrifuge, washing the obtained solid three times with absolute ethanol and deoxygenated deionized water successively, to obtain nano-sized zero-...

Embodiment 2

[0024] 1) with step 1) among the embodiment 1;

[0025] 2) Prepare 150 ml of suspension of the nanoscale zero-valent iron particles prepared in step 1) with deoxygenated and deionized water, add 0.2 ml of oleic acid, stir and react at 30° C. for 3 hours, and use a centrifuge to separate the solid and liquid. Washing the obtained solid three times with absolute ethanol and deoxygenated deionized water successively to obtain nano-scale zero-valent iron particles coated with oleic acid;

[0026] 3) Make 150 ml suspension of oleic acid-coated nano-scale zero-valent iron particles prepared in step 2) with deoxygenated deionized water, add 0.2 g of Pluronic F-127, and stir at 30°C for 10 hours , the obtained solid was ultrasonically washed 6 times with deoxygenated deionized water, and then dried in a vacuum oven at 50° C. for 3 hours to obtain nano-sized zero-valent iron particles coated with oleic acid-pluronic.

[0027] Depend on image 3 It can be seen that the nanoscale zero-...

Embodiment 3

[0029] 1) with step 1) among the embodiment 1;

[0030] 2) The nanoscale zero-valent iron particles prepared in step 1) were made into 150 ml of suspension with deoxygenated deionized water, and 0.17 ml of oleic acid was added, stirred and reacted at room temperature for 3 hours, and solid-liquid separation was carried out with a centrifuge. The obtained solid was washed three times with absolute ethanol and deoxygenated deionized water successively to obtain nano-scale zero-valent iron particles coated with oleic acid;

[0031] 3) The oleic acid-coated nano-scale zero-valent iron particles prepared in step 2) were used to make 150 ml of suspension with deoxygenated deionized water, and after adding 0.15 g of Pluronic F-127, the reaction was stirred at room temperature for 10 hours, The obtained solid was ultrasonically washed 6 times with deoxygenated deionized water, and then dried in a vacuum oven at room temperature for 24 hours to obtain nano-sized zero-valent iron partic...

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Abstract

The invention relates to a nanolevel zero-valent iron particle coated with oleic acid-Pluronic and a synthetic method thereof, belonging to the technical field of environmental materials. The invention aims at providing a nanolevel zero-valent iron particle coated with oleic acid-Pluronic which can form stable suspending liquid in water and a synthetic method thereof. The synthetic method comprises the following steps: 1) the nanolevel zero-valent iron particle and the oleic acid with the mass ratio of 4.0:1 to 8.5:1 react for 0.5 to 3 hours under the temperature of room temperature to 80 DEG C to obtain the nanolevel zero-valent iron particle coated with oleic acid; and 2) the nanolevel zero-valent iron particle coated with oleic acid and Pluronic F-127 with the mass ratio of 4.5:1 to 6.5:1 react for 9 to 10 hours under the temperature of the room temperature to 30 DEG C to obtain the nanolevel zero-valent iron particle coated with oleic acid-Pluronic. The invention has the advantages of simple synthetic method and easy operation and repeat and the like; and the obtained nanolevel zero-valent iron particle coated with oleic acid-Pluronic has application prospect in the field of underground water remediation.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and in particular relates to an oleic acid-pluronic-coated nano-scale zero-valent iron particle and a synthesis method thereof. Background technique [0002] Transporting nanoscale zero-valent iron particles with large specific surface area and high reactivity to chlorinated hydrocarbon-contaminated areas in groundwater is a promising technique for in-situ remediation of groundwater. However, nanoscale zero-valent iron particles are easy to agglomerate, which firstly affects their movement in groundwater, and secondly leads to a decrease in their specific surface area, thereby affecting their reactivity. In order to effectively use nanoscale zero-valent iron particles for in situ remediation of groundwater, they must form a stable suspension. Contents of the invention [0003] The object of the present invention is to solve the problems in the prior art, and provide a kind of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02
Inventor 卫建军李闪
Owner BEIJING UNIV OF CHEM TECH
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