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Modified nanoscale zero-valent iron and preparing method thereof

A nano-zero-valent iron modification technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problem of affecting the reactivity and processing efficiency of nano-zero-valent iron, the instability of nano-zero-valent iron, reactivity, Reduced mobility and other issues, to achieve the effect of fast preparation, easy access, and low requirements for experimental equipment

Inactive Publication Date: 2014-12-24
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because nano-zero-valent iron is very unstable, it is easy to collide with each other, condense and aggregate into large particles, and it is easy to react with water and oxygen in the environment, resulting in a decrease in its reactivity and mobility, which greatly affects the reactivity of nano-zero-valent iron. and processing efficiency

Method used

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  • Modified nanoscale zero-valent iron and preparing method thereof
  • Modified nanoscale zero-valent iron and preparing method thereof
  • Modified nanoscale zero-valent iron and preparing method thereof

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Embodiment 1

[0031] see figure 1 : a modified nano zero valent iron of the present invention, the modified nano zero valent iron comprises nano zero valent iron and sodium lauryl sulfate, and sodium lauryl sulfate wraps on the surface of nano zero valent iron to form a shell core The structure is that sodium dodecyl sulfate physically modifies the surface of nano zero-valent iron; the mass ratio of sodium dodecyl sulfate to nano zero-valent iron in the modified nano zero-valent iron is 0.01:1.

[0032] A preparation method of the above-mentioned modified nanometer zero-valent iron, comprising the following steps:

[0033] (1) FeSO 4 Solution preparation: weigh 0.7000g FeSO 4 ·7H 2 Put O in a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 50mL volumetric flask, set the volume to the mark, and shake well to obtain 0.05M FeSO 4 solution.

[0034] (2)NaBH 4 Solution preparation: weigh 0.3783g NaBH 4 Put it in a beaker, add an appropriate amount of ult...

Embodiment 2

[0039] A modified nano-zero-valent iron of the present invention, the modified nano-zero-valent iron includes nano-zero-valent iron and sodium dodecyl sulfate, and the sodium dodecyl sulfate is wrapped on the surface of the nano-zero-valent iron to form a core-shell structure Carrying out physical modification on the surface of nanometer zero-valent iron; the mass ratio of sodium dodecyl sulfate to nanometer zero-valent iron in the modified nanometer zero-valent iron is 0.03:1.

[0040] A preparation method of the above-mentioned modified nanometer zero-valent iron, comprising the following steps:

[0041] (1) FeSO 4 Solution preparation: weigh 1.4000g FeSO 4 ·7H 2 Put O in a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 50mL volumetric flask, set the volume to the mark, and shake well to obtain 0.1M FeSO 4 solution.

[0042](2)NaBH 4 Solution preparation: weigh 0.7566g NaBH 4 Put it in a beaker, add an appropriate amount of ultrapure...

Embodiment 3

[0047] A modified nano-zero-valent iron of the present invention, the modified nano-zero-valent iron includes nano-zero-valent iron and sodium dodecyl sulfate, and the sodium dodecyl sulfate is wrapped on the surface of the nano-zero-valent iron to form a core-shell structure and performing physical modification on the surface of the nanometer zero-valent iron; the mass ratio of sodium dodecyl sulfate to the nanometer zero-valent iron in the modified nanometer zero-valent iron is 0.05:1.

[0048] A preparation method of the above-mentioned modified nanometer zero-valent iron, comprising the following steps:

[0049] (1) FeSO 4 Solution preparation: weigh 3.9200g FeSO 4 ·7H 2 Put O in a beaker, add an appropriate amount of ultrapure water to dissolve, transfer the above solution to a 200mL volumetric flask, set the volume to the mark, and shake well to obtain 0.07M FeSO 4 solution.

[0050] (2)NaBH 4 Solution preparation: weigh 2.1437g NaBH 4 Put it in a beaker, add an ap...

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Abstract

The invention discloses modified nanoscale zero-valent iron and a preparing method thereof. The modified nanoscale zero-valent iron comprises nanoscale zero-valent iron and lauryl sodium sulfate. The lauryl sodium sulfate is wrapped on the surface of the nanoscale zero-valent iron, and the mass ratio of the lauryl sodium sulfate and the nanoscale zero-valent iron is 0.01-0.07. The preparing method of the modified nanoscale zero-valent iron comprises the following steps that nanoscale zero-valent iron particles are dispersed in a lauryl sodium sulfate solution through ultrasound, and the modified nanoscale zero-valent iron is obtained. According to the modified nanoscale zero-valent iron and the preparing method thereof, the lauryl sodium sulfate is used for modifying the nanoscale zero-valent iron, through a steric-hinerance effect, nano materials are stabilized, and the advantages of being good in dispersing performance, good in stability, high in reactivity and the like are achieved.

Description

technical field [0001] The invention belongs to the field of physical and chemical treatment of heavy metals in polluted environments, and in particular relates to a novel modified nanometer material and a preparation method thereof. Background technique [0002] As an effective reducing agent and adsorbent, nano-zero-valent iron has small particle size, large specific surface area and large surface energy, so it has excellent adsorption performance and high reduction activity. The reactivity and processing efficiency of zero-valent iron particles can be improved by utilizing the unique surface effect and small size effect of nanoparticles. Therefore, it has received widespread attention in the field of environmental restoration and governance. However, because nano-zero-valent iron is very unstable, it is easy to collide with each other, condense and aggregate into large particles, and it is easy to react with water and oxygen in the environment, resulting in a decrease in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/24C02F1/28C02F1/70C02F11/00B82Y30/00B82Y40/00
Inventor 陈国敏黄丹莲曾光明许飘赖萃袁兴中张辰黄超
Owner HUNAN UNIV
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