Ferromagnetic carbon-based composite material, and preparation method and application thereof

A carbon-based composite material and ferromagnetic technology, applied in chemical instruments and methods, alkali metal compounds, and other chemical processes, can solve the problems of magnetic weakening, complicated preparation process, and disappearance, and achieve easy separation, uniform distribution, and magnetic properties. long-lasting effect

Pending Publication Date: 2021-11-23
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method uses an ammonia water precipitant, the preparation process is complicated, and there is a problem of further oxidation of ferroferric oxide leading to magnetic weakening or disappearance. At the same time, it is unknown whether the wastewater treatment agent prepared by this method can be antibacterial

Method used

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  • Ferromagnetic carbon-based composite material, and preparation method and application thereof
  • Ferromagnetic carbon-based composite material, and preparation method and application thereof
  • Ferromagnetic carbon-based composite material, and preparation method and application thereof

Examples

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Embodiment 1

[0091] This embodiment provides a method for preparing a ferromagnetic carbon-based composite material, the preparation method comprising the following steps:

[0092] (1) Mix 200 mesh activated carbon with a graphene oxide solution with a mass fraction of 3.5%, the mass ratio of graphene oxide in the activated carbon to graphene oxide solution is 50:1, stir at 60°C for 20min, heat up to 90°C and add The cassava flour linking agent was reacted for 10 minutes, and the suspension after the reaction was left to stand at 25°C, and the solid was obtained by suction filtration after layering, and the solid was dried at 105°C for 20 hours to obtain activated carbon / graphene oxide;

[0093] Wherein, the quality of the linking agent is 20% of the mass of the activated carbon, the linking agent is a linking agent suspension, and the linking agent suspension is ultrasonically treated for 20 min in advance, and the linking agent powder and deionized water in the linking agent suspension ar...

Embodiment 2

[0097] This embodiment provides a method for preparing a ferromagnetic carbon-based composite material, except that FeCl in step (2) 2 The mass of solute in the solution is 1.0% of the activated carbon / graphene oxide mass, and the temperature of the charcoal thermal reaction in step (3) is 800° C., and other conditions are exactly the same as in Example 1.

Embodiment 3

[0099] This embodiment provides a method for preparing a ferromagnetic carbon-based composite material, except that FeCl in step (2) 2 The mass of solute in the solution is 0.5% of the activated carbon / graphene oxide mass, and the temperature of the charcothermal reaction in step (3) is 900° C., and other conditions are exactly the same as in Example 1.

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Abstract

The invention provides a preparation method of a ferromagnetic carbon-based composite material. The preparation method comprises the following steps: adding graphene oxide-loaded active carbon into a ferrous ion solution for impregnation, then carrying out a carbon thermal reaction to obtain the ferromagnetic carbon-based composite material, furthermore, adding a non-ferrous metal salt for secondary impregnation after impregnation in the ferrous ion solution to obtain the bimetallic-loaded ferromagnetic carbon-based composite material. According to the preparation method disclosed by the invention, graphene oxide is loaded on activated carbon in advance to provide more loading sites and enable metal loading to be more uniform; the loaded gamma-Fe2O3 realizes magnetic separation, and the magnetic gamma-Fe2O3 is more stable; synchronous reduction of graphene oxide is realized through a carbon thermal reaction, the specific surface area is increased, and the adsorption efficiency is improved; non-ferrous metal can be further loaded to enhance the bacteriostatic effect; and the composite material has a good removal effect on anions or organic pollutants and is low in mass production difficulty.

Description

technical field [0001] The invention belongs to the technical field of preparation of environment-friendly materials, and in particular relates to a ferromagnetic carbon-based composite material and its preparation method and application. Background technique [0002] The production and use of activated carbon is a typical representative of the resource utilization of agricultural and forestry solid waste. Due to its large specific surface area, well-developed pores, adjustable surface composition, low price, and wide application range, it has been widely used in the field of environmental restoration. Adsorption capacity, adsorption efficiency, and adsorption selectivity are important indicators for evaluating the performance of activated carbons. The development of new activated carbons based on the above indicators is an important topic in the field of adsorption research, and it is also a key link in the innovation and breakthrough of practical application technologies. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J20/32C02F1/28C02F101/30
CPCB01J20/20B01J20/28009B01J20/3042B01J20/3078B01J20/32C02F1/288C02F2101/30
Inventor 刘学蛟汪印潘蓓蓓李智伟徐清馨
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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