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Graphene-porous ceramic composite adsorbing material and preparation method and application thereof

A technology of composite adsorption materials and porous ceramics, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, and can solve problems such as high cost, no mention, and difficulty in large-scale industrialization

Active Publication Date: 2015-04-01
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It should be noted that the porous ceramics used in this method are ground from one or more kinds of ceramic powders into powders with different particle sizes, and then the powders and binders are blended and ground, and then dried and formed after mixing evenly. A porous ceramic matrix is ​​obtained, and the composite material is only limited to the application of electrical conductivity
[0007] Chinese patent CN102827587A discloses a phase-change energy storage material / graphene / porous ceramic composite thermal management material and its preparation method and application. First, a layer of metal is attached to the surface of the porous ceramic, and then chemical vapor deposition is used on the porous ceramic. Graphene can be grown on the surface of the porous ceramic, because the method attaches a layer of metal to the surface of the porous ceramic first, and graphene cannot grow inside the porous ceramic. Similarly, the composite material is only limited in the application of electrical conductivity; or the porous ceramic used It still needs to be self-prepared to obtain a unique structure, and the porous ceramics used in this patent are all macroscopic holes. Similarly, the composite material is only a thermal management material
[0008] Most of the above-mentioned graphene composite materials utilize the mechanical and electrical properties of graphene, and there is no mention of the application of graphene in the field of adsorption and decontamination.
In addition, most of the prior art uses chemical vapor deposition to prepare graphene composite materials, which has problems such as high cost and difficulty in large-scale industrialization.

Method used

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  • Graphene-porous ceramic composite adsorbing material and preparation method and application thereof
  • Graphene-porous ceramic composite adsorbing material and preparation method and application thereof

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Effect test

Embodiment 1

[0031] The preparation method of graphene-porous ceramic composite adsorption material of the present invention, realizes by following steps:

[0032] (1) Clean and dry the blank porous ceramic substrate; the porous ceramic substrate adopts common porous alumina, porous zirconia or porous silica, and the diameter of the pores on it is 2nm-600um, and the blank porous ceramic substrate Microscopic morphology of scanning electron microscope figure 1 shown;

[0033] (2) citric acid and water configuration mass ratio are 250ml of citric acid aqueous solution of 20%; Weigh 60g of the porous ceramic substrate obtained in the above step (1), place the porous ceramic substrate in a muffle furnace, press 5 ℃-20 Heat up to 500°C at a rate of °C / min, and fire at 500°C for 6 minutes. After firing, quickly take out the porous ceramic substrate and immerse it in the above-mentioned prepared citric acid aqueous solution, so that the citric acid is loaded on the inside of the porous ceramic s...

Embodiment 2

[0038](1) Clean and dry the blank porous ceramic substrate; the porous ceramic substrate adopts common porous alumina, porous zirconia or porous silica, and the aperture of the holes on it is 2nm-600um;

[0039] (2) 250ml of 10% sucrose aqueous solution with sucrose and water configuration mass ratio; Weigh 60g of the porous ceramic substrate obtained in the above step (1), place the porous ceramic substrate in a muffle furnace, press 5°C-20°C / Raise the temperature to 500°C at a rate of 1 min, and fire at 500°C for 6 minutes. After firing, quickly take out the porous ceramic substrate and immerse it in the above-mentioned prepared sucrose aqueous solution, so that the sucrose is loaded inside the porous ceramic substrate. After immersion for 24 hours, take out The porous ceramic matrix loaded with sucrose was blown with a hair dryer for 10 minutes, or dried in a fume hood for 24 hours;

[0040] (3) Put the porous ceramic matrix loaded with sucrose into the atmosphere furnace,...

Embodiment 3

[0044] (1) Clean and dry the blank porous ceramic substrate; the porous ceramic substrate adopts common porous alumina, porous zirconia or porous silica, and the aperture of the holes on it is 2nm-600um;

[0045] (2) be made into the mixed aqueous solution 250ml that mass ratio is 15% with the honey of equal quality, glucose with water, take by weighing the porous ceramic substrate of 60g above-mentioned step (1) gained, the porous ceramic substrate is placed in the muffle furnace, press Heat up to 500°C at a rate of 5°C-20°C / min, and fire at 500°C for 6 minutes. After firing, quickly take out the ceramics and immerse them in the above mixed aqueous solution, so that honey and glucose are loaded inside the porous ceramic matrix, and immerse for 24 hours. Finally, take out the porous ceramic matrix loaded with honey and glucose, blow it with a hair dryer for 10 minutes, or dry it in a fume hood for 24 hours;

[0046] (3) Put the porous ceramic matrix loaded with honey and gluco...

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Abstract

The invention discloses a graphene-porous ceramic composite adsorbing material and a preparation method and application thereof. The composite adsorbing material is a porous ceramic internally loaded with graphene. The preparation method of the composite adsorbing material comprises the following steps: (1) loading organic micromolecules or organic macromolecules or a mixture of the organic micromolecules and the organic macromolecules inside the porous ceramic by a dissolving and soaking method; and (2) sintering the porous ceramic internally loaded with the organic micromolecules or the organic macromolecules or the mixture of the organic micromolecules and the organic macromolecules to obtain the graphene-porous ceramic composite adsorbing material. The graphene-porous ceramic composite adsorbing material is applied to the field of sewage treatment; after the porous ceramic is internally loaded with the graphene, the adsorption and decontamination capacity of the porous ceramic is significantly enhanced, and the material is easily prepared on a large scale, can resist various acid-base environments and can be recycled. The graphene-porous ceramic composite adsorbing material and the preparation method and application thereof have an important practical significance for research and development of an adsorbent in the field of sewage treatment.

Description

technical field [0001] The invention belongs to the field of graphene composite materials, in particular to a graphene-porous ceramic composite adsorption material and its preparation method and application. Background technique [0002] Porous ceramics have been used as an adsorption material for a long time, but ordinary porous ceramics are not strong in adsorption and decontamination. [0003] Graphene is a new type of carbon material with a single-atom thickness two-dimensional honeycomb structure. Due to its unique and strange properties, such as single-layer graphene has extraordinary electronic properties, thermal and mechanical properties, and a huge specific surface area (up to 2965m 2 / g) has been widely concerned and studied by scientists. In particular, the huge specific surface area of ​​graphene has broad application prospects in the field of adsorption and decontamination. [0004] Graphene composites can obtain the excellent properties of graphene and subs...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28
CPCB01J20/20B01J20/28054C02F1/288
Inventor 陈国华王师杨文
Owner HUAQIAO UNIVERSITY
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