Magnetic graphene-supported nano zero-valent iron composite material as well as preparation method and application thereof

A technology of magnetic graphene and nano-zero-valent iron, which is applied in chemical instruments and methods, alkali metal compounds, and other chemical processes, and can solve problems such as agglomeration of nano-zero-valent iron and loose combination of nano-zero-valent iron and graphene , to achieve the effect of improving surface activity, good magnetic properties and high feasibility

Inactive Publication Date: 2019-06-07
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some problems such as the partial agglomeration of nano-zero-valent iron and the incomplete combination of nano-zero-valent iron and graphene.

Method used

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  • Magnetic graphene-supported nano zero-valent iron composite material as well as preparation method and application thereof
  • Magnetic graphene-supported nano zero-valent iron composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Preparation of magnetic graphene-loaded nano-zero-valent iron composites

[0031] A method for preparing a magnetic graphene-loaded nano-zero-valent iron composite material, the specific steps of which are:

[0032] Step 1: Take a 500 mL flask and place it in an ice bath, and pour 1.0 g of graphite powder, 1.0 g of sodium nitrate and 46.0 ml of concentrated sulfuric acid into the flask and mix them. Then slowly add 4.0 g of potassium permanganate under magnetic stirring. After 1 h, the mixture was transferred to an oil bath, controlled for 35 ◦ Stir at C for 1 h. Then carefully add 60.0 mL deionized water, the temperature of the solution rises by about 90 ◦ C and keep for 30min. After that, 140 mL of deionized water and 20.0 mL of 30% hydrogen peroxide were added to the flask. After the solution was mixed, the solution was poured out, centrifuged and washed several times with 30% HCl solution, and then washed several times with deionized water, at 60 ◦ ...

Embodiment 2

[0037] Example 2: Application of magnetic graphene-loaded nano-zero-valent iron composite material to remove CL-20 in wastewater

[0038] In order to form an experimental comparison, under the same experimental conditions, magnetic graphene (MG), commercial iron powder (nZVIpowder), nano-zero-valent iron (nZVI), graphene-supported nano-zero-valent iron composite (nZVI@rGO) and Removal effect of magnetic graphene-supported nano zero-valent iron composite (nZVI@MG) on CL-20.

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Abstract

The invention discloses a magnetic graphene-supported nano zero-valent iron composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing graphene oxide by a modified Hummers method; mixing the above graphene oxide, ferric chloride and sodium acetate, and performing a hydrothermal reaction to obtain magnetic graphene; and fully mixing the above product and a ferrous salt solution, and under the protection of nitrogen, reducing the ferrous salt by sodium borohydride to obtain the magnetic graphene-supported nano zero-valent iron composite material. The preparation method provided by the invention is easy to operate and has low costs, and the prepared composite material has strong degradation ability, good stability and easy magnetic separation, and is an environmentally-friendly functional material; and the embodiments verify that the material has a good removal effect on refractory nitrocompounds.

Description

technical field [0001] The invention relates to the field of preparation of environmental functional materials, in particular to a magnetic graphene-loaded nano-zero-valent iron composite material, a preparation method and its application in the treatment of wastewater containing refractory nitro compounds. Background technique [0002] With the rapid development of our country's society and economy, the problem of environmental pollution is becoming more and more prominent, and its negative impact is also becoming more and more significant. Therefore, it is more and more urgent to strengthen the research and development of environmental pollution control materials. [0003] Zero-valent iron materials are widely used in the field of water environment restoration in recent years. Among them, due to the advantages of small particle size, large specific surface area, and high reactivity, the treatment effect of nano-zero-valent iron is far better than that of ordinary zero-val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/38
Inventor 沈锦优孙颖璐李辉夏杰成士华张德锦王连军江心白李健生
Owner NANJING UNIV OF SCI & TECH
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