Load-type nano zero-valence iron particle and preparation method therefor

A nano-zero-valent iron, load-type technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, can solve the problem of uneven particle size distribution of nano-zero-valent iron particles, low reactivity, and ease of use. Problems such as agglomeration occur, and the effect of small particle size distribution range, uniform distribution and low price is achieved.

Inactive Publication Date: 2015-08-05
上海乾堉环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] One of the purposes of the present invention is to provide a loaded nano-zero-valent iron particle and its preparation method in order to solve th

Method used

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  • Load-type nano zero-valence iron particle and preparation method therefor
  • Load-type nano zero-valence iron particle and preparation method therefor
  • Load-type nano zero-valence iron particle and preparation method therefor

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0037] Example 1

[0038] A supported nano-zero-valent iron particle uses modified sepiolite as a carrier, and nano-zero-valent iron particles are loaded on the surface and inside of the modified sepiolite carrier. The preparation process specifically includes the following steps:

[0039] (1) Preparation of modified sepiolite

[0040] Add a 15% hydrochloric acid aqueous solution with a concentration of 15% by mass to the natural sepiolite powder, then mix and stir it thoroughly at 25-30℃ for 48h, then wash with deoxygenated deionized water until the effluent is neutral, and then control the temperature to 115- Dry at 125°C, then control the temperature to 310-330°C for roasting, then grind, pass through a 160-200 mesh sieve, and the resulting powder is modified sepiolite;

[0041] The amount of hydrochloric acid aqueous solution with a mass percentage concentration of 15% is calculated by mass ratio, that is, natural sepiolite powder: a hydrochloric acid aqueous solution with a ma...

Example

[0052] Comparative Example 1

[0053] A nano zero-valent iron particle is prepared by a method including the following steps:

[0054] The preparation process is the same as the steps (2), (3), (4) in Example 1 except that modified sepiolite is not added, and finally nano zero-valent iron particles are obtained.

Example Embodiment

[0058] Example 2

[0059] A supported nano-zero-valent iron particle, using modified sepiolite as a carrier, and nano-zero-valent iron particles are loaded on the surface and inside of the modified sepiolite carrier. The preparation process is except for the step (3) NaBH with a concentration of 0.4mol / L 4 KBH with a concentration of 0.4mol / L for aqueous solution 4 Instead of aqueous solution, the others are the same as in Example 1.

[0060] Using transmission electron microscope equipment (JEM 2011, Jeol, Japan) to measure the supported nano-zero-valent iron particles obtained above, it can be concluded that the nano-zero-valent iron particles supported on the surface of the modified sepiolite support The diameter is 5-20 nm, and the diameter of the nano zero-valent iron particles loaded inside the modified sepiolite is about 0.01-1 nm.

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Abstract

The invention discloses a load-type nano zero-valence iron particle and a preparation method therefor. The iron particle takes modified sepiolite as a carrier, and the surface and interior of the modified sepiolite are respectively provided with nano zero-valence iron particles. The preparation method comprises four steps: the preparation of the modified sepiolite; the preparation of modified sepiolite solution containing iron ions; the preparation of nano zero-valence iron solution; and the preparation of the load-type nano zero-valence iron particle. The obtained load-type nano zero-valence iron particle is better in dispersity and reactivity. The preparation method is simple in technology, is convenient to operate, and is simple in needed equipment.

Description

technical field [0001] The invention relates to a loaded nanometer zero-valent iron particle and a preparation method thereof, and belongs to the technical field of nanometer material preparation and new materials for environmental pollution control. Background technique [0002] The reductive removal of environmental pollutants using nano-zero-valent iron is a topic of applied research at home and abroad in recent years. Compared with ordinary iron powder, nano-zero-valent iron has a larger specific surface area, smaller particle size, and higher reactivity. It shows higher activity when reacting with other substances, and the treatment effect is better. application prospects. However, due to the easy agglomeration and easy oxidation of nano zero-valent iron, its degradation efficiency decreases. Therefore, the development and utilization of nano-zero-valent iron-loaded material technology is of great significance to inhibit or even eliminate the agglomeration of nano-zer...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24C02F1/70C09K17/08B82Y30/00B82Y40/00
Inventor 母娜付融冰杨颖频徐珍郭小品毕东苏
Owner 上海乾堉环境科技有限公司
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