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Preparation method and application of beta-FeOOH-loaded graphene oxide catalyst

A technology of iron oxyhydroxide and graphene, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as limiting the application range of solar photocatalysis, and achieve Easy to separate, recycle and reuse, good application prospects, simple process

Inactive Publication Date: 2016-09-07
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, the literature has reported the use of ultraviolet light to catalyze the degradation of dye molecules in water. However, ultraviolet light only accounts for 3%-5% of sunlight, while visible light accounts for about 43% of sunlight. Therefore, solar photocatalysis is limited. Therefore, the research on visible light catalytic degradation of water pollutants has more practical significance

Method used

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  • Preparation method and application of beta-FeOOH-loaded graphene oxide catalyst
  • Preparation method and application of beta-FeOOH-loaded graphene oxide catalyst
  • Preparation method and application of beta-FeOOH-loaded graphene oxide catalyst

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Embodiment 1

[0021] The β-iron oxyhydroxide supported graphene oxide catalyst was prepared by a simple hydrolysis method. Weigh 0.1 g of graphene oxide and dissolve it in 80 mL of aqueous solution, and stir evenly to obtain a graphene oxide dispersion. Then weigh 1.1g FeCl 3 ·6H 2 O was dissolved in the above graphene oxide dispersion, the mixed solution was ultrasonicated for 60 minutes, stirred and reacted for 6 hours under the condition of heating in a water bath at 90°C, cooled to room temperature, centrifuged and washed with deionized water and ethanol for 5 times, dried in an oven at 70°C for 12 hours, and ground into powder, namely to obtain the β-oxyhydroxide-supported graphene oxide catalyst. Catalysts were stored in polyethylene bottles for later use.

Embodiment 2

[0023] The β-iron oxyhydroxide supported graphene oxide catalyst was prepared by a simple hydrolysis method. Weigh 0.1 g of graphene oxide and dissolve it in 80 mL of aqueous solution, and stir evenly to obtain a graphene oxide dispersion. Then weigh 2.2g FeCl 3 ·6H 2 O was dissolved in the above graphene oxide dispersion, ultrasonicated the mixed solution for 80 min, stirred and reacted in a water bath at 90°C for 6 h, cooled to room temperature, centrifuged and washed 5 times with deionized water and ethanol, dried in an oven at 80°C for 12 h, and ground into powder, namely to obtain the graphene oxide catalyst supported by β-iron oxyhydroxide. The morphology of the prepared β-iron oxyhydroxide supported graphene oxide catalyst was characterized by scanning electron microscopy, see attached figure 1 , β-iron oxyhydroxide is spindle-shaped and uniformly supported on graphene oxide flakes. The crystal structure of β-iron oxyhydroxide supported graphene oxide catalyst was c...

Embodiment 3

[0025] The β-iron oxyhydroxide supported graphene oxide catalyst was prepared by a simple hydrothermal method. Weigh 0.1 g of graphene oxide and dissolve it in 100 mL of aqueous solution, and stir evenly to obtain a graphene oxide dispersion. Then weigh 4.4g FeCl 3 ·6H 2 O was dissolved in the above graphene oxide dispersion, ultrasonicated the mixed solution for 60min, stirred and reacted for 8h under the condition of heating in a water bath at 90°C, cooled to room temperature, centrifuged and washed 5 times with deionized water and ethanol, dried in an oven at 90°C for 12h, and ground into powder, namely to obtain the graphene oxide catalyst supported by β-iron oxyhydroxide. Catalysts were stored in polyethylene bottles for later use.

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Abstract

The invention discloses a preparation method and application of a beta-FeOOH-loaded graphene oxide catalyst. The preparation method comprises the following steps: dispersing graphene oxide in water, carrying out ultrasonic treatment so as to obtain uniform dispersion liquid of graphene oxide, then adding ferric trichloride into the dispersion liquid of graphene oxide, carrying out heating in a constant-temperature water-bath so as to load beta-FeOOH onto the surface of graphene oxide and subjecting the obtained product to centrifugation, washing and drying so as to obtain the nanometer beta-FeOOH-loaded graphene oxide catalyst. The catalyst and hydrogen peroxide are added into a dye water body with a certain concentration; and under illumination of visible light, dye chroma is removed, biotoxicity is reduce, and the water body is purified. The catalyst is free of secondary pollution, and an intermediate produced in the reaction has obvious reduced biotoxicity; reaction conditions are mild, and the reaction can be carried out under the condition of visible light; process flow is simple in operation; raw materials used for preparation of the catalyst are easily available; the reacted solid phase catalyst is easy to separate; so the catalyst has good application prospects in the field of water pollution treatment.

Description

technical field [0001] The invention relates to dye wastewater treatment technology, in particular to a preparation method of β-oxyhydroxide-supported graphene oxide and its application in dye visible light catalysis. Specifically, it relates to a catalyst for removing the chromaticity of dyes in water bodies, mineralizing them, and reducing their biological toxicity. Background technique [0002] Dye wastewater, as a typical source of wastewater pollution, has become an urgent environmental problem due to its large chroma, high salinity, refractory degradation and serious biological toxicity. Textile, paper and other industrial enterprises are the main sources of dye wastewater. A large amount of dyes are discharged into the water environment, which not only affects the appearance, but also causes toxicity to many organisms and threatens the health of organisms. As a cationic dye, methylene blue is widely used in textile printing and dyeing industries. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/30C02F1/72C02F101/30
CPCC02F1/30C02F1/722B01J23/745C02F2101/308B01J35/39Y02W10/37
Inventor 赵雅萍刘玉洋徐斌吕佳欣付丹丹范云芳
Owner EAST CHINA NORMAL UNIV
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