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Method for preparing iron oxyhydroxide-loaded graphene oxide-layered hydroxide composite material

A technology of layered hydroxide and iron oxyhydroxide, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problem of difficult water treatment to meet reuse requirements, low regeneration efficiency of activated carbon, high price, etc. problems, to achieve the effect of increasing the pore size, improving the adsorption performance and improving the stability

Active Publication Date: 2020-01-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Activated carbon has a strong adsorption capacity and a high removal rate, but the regeneration efficiency of activated carbon is low, and it is difficult to meet the reuse requirements of the treated water quality. The price is expensive and the application is limited.

Method used

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  • Method for preparing iron oxyhydroxide-loaded graphene oxide-layered hydroxide composite material
  • Method for preparing iron oxyhydroxide-loaded graphene oxide-layered hydroxide composite material
  • Method for preparing iron oxyhydroxide-loaded graphene oxide-layered hydroxide composite material

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Embodiment 1

[0031] This embodiment provides a method for preparing a graphene oxide-layered hydroxide-loaded iron oxyhydroxide composite material, and the specific preparation method is as follows:

[0032] Step 1, prepare a graphene oxide suspension with a concentration of 2mg / L, and use water as a dispersant; process it with 150W ultrasonic treatment for 30min to make it uniformly dispersed.

[0033] Step 2, weigh 2.4gNaOH, 2.1gNa 2 CO 3 Prepare alkaline solution, the pH of the alkaline solution is 9-10; weigh 6.1gMgCl 2 ·6H 2 O, 2.2g AlCl 3 ·6H 2 Prepare 100 mL of each metal salt solution of O.

[0034] Step 3: Under stirring conditions, the alkali solution and the metal salt solution are dropped into the graphene oxide suspension at the same time, and the graphene oxide-layered hydroxide composite material is obtained after aging, filtering, washing and drying in sequence. The aging temperature is 25°C, the aging time is 24h, the drying temperature is 65°C, and the drying time i...

Embodiment 2

[0039] This embodiment provides a method for preparing a graphene oxide-layered hydroxide-loaded iron oxyhydroxide composite material, and the specific preparation method is as follows:

[0040] Step 1, prepare a graphene oxide suspension with a concentration of 5mg / L, and use water as a dispersant; process it with 300W ultrasonic treatment for 30min to make it uniformly dispersed.

[0041] Step 2, weigh 3.6g NaOH, 3.2gNa 2 CO 3 Prepare alkaline solution and 8.1gMgCl 2 ·6H 2 O, 4.3g AlCl 3 ·6H 2 Prepare 100 mL of each metal salt solution of O.

[0042]Step 3: Under stirring conditions, the alkali solution and the metal salt solution are dropped into the graphene oxide suspension at the same time, and the graphene oxide-layered hydroxide composite material is obtained after aging, filtering, washing and drying in sequence. The aging temperature is 25° C., the aging time is 24 hours, the drying temperature is 65° C., and the drying time is 24 hours.

[0043] Step 4, prepa...

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Abstract

The invention discloses a method for preparing an iron oxyhydroxide-loaded graphene oxide-layered hydroxide composite material. The preparation method comprises the following steps: under a stirring condition and in an air or oxygen atmosphere, adding a graphene oxide-layered hydroxide composite material into an aqueous solution of a bivalent iron salt, and sequentially performing ageing, filtering, washing and drying to obtain the iron oxyhydroxide-loaded graphene oxide-layered hydroxide composite material, wherein a pH value is adjusted with alkali liquor in the process of ageing, and the concentration of the aqueous solution of the bivalent iron salt is 250 mg / L-1000 mg / L. According to the invention, the iron oxyhydroxide is loaded on the graphene oxide / aluminum-magnesium layered doublehydroxide composite material to prepare a novel adsorption material so as to improve the adsorption performance of the composite material; and the composite material is more widely applied, and especially has good heavy metal adsorption capacity when used for heavy metal wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of heavy metal wastewater treatment adsorption materials, in particular to a method for preparing a graphene oxide-layered hydroxide-loaded iron oxyhydroxide composite material. Background technique [0002] At present, the chemical industry calls for "zero discharge", so how to more effectively remove heavy metals in wastewater has always been a key research topic for domestic and foreign scientific and technological workers. The methods of heavy metal wastewater treatment can be roughly divided into three categories: chemical method, physical treatment method and biological treatment method. Physical treatment mainly includes solvent extraction separation, ion exchange method, membrane separation technology and adsorption method. [0003] Adsorption is an effective method to remove heavy metal ions in water by using porous solid substances. Adsorption has many advantages in treating heavy metal wastewater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/0229B01J20/20C02F1/281C02F2101/20
Inventor 李慧强廖维杨平
Owner SICHUAN UNIV
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