Graphene oxide-cerium oxide-iron oxide composite material and synthetic method thereof, and application in catalytic degradation

Abstract

The invention discloses a graphene oxide-cerium oxide-iron oxide composite material and a synthesis method thereof, and application of the graphene oxide-cerium oxide-iron oxide composite material incatalytic degradation. According to the invention, a graphene oxide-cerium oxide-iron oxide composite material is prepared by combining a direct precipitation method and a solvothermal method, whereinthe structure and properties of the catalyst are researched by characterizing the catalyst through a Fourier transform infrared spectrum, a scanning electron microscope and an X-ray diffraction spectrometer; under the combined action of the catalyst and potassium peroxydisulfate (KHSO5) serving as an oxidizing agent, a malachite green aqueous solution is catalytically degraded, and the catalyticdegradation capacity of the catalyst on the organic dye malachite green under the conditions of different concentrations, different pH values, different temperatures and different catalyst usage amounts is respectively studied, so that the lower the initial malachite green concentration is, the higher the pH value is, the more the catalyst addition amount is, and the higher the temperature is, thefaster the degradation rate is; and the product has the advantages of obvious catalytic effect, short time and low consumption, can be recycled many times after being processed, and can be used as agreen catalyst.

Description

【Technical field】 [0001] The invention belongs to the technical field of catalyst synthesis, in particular to a graphene oxide-cerium oxide-iron oxide composite material, a synthesis method and its application in catalytic degradation. 【Background technique】 [0002] There are many wastewater treatment technologies, and the traditional treatment methods mainly include: physical methods include adsorption method, membrane separation method, and ion exchange method. Biological treatment methods include: removal of white rot bacteria, microbial adsorption, and anaerobic decomposition. Chemical methods include: chemical oxidation method, Fenton oxidation method, ozone oxidation method, photocatalytic oxidation method, electrochemical degradation method, and sodium hypochlorite oxidation method. Photocatalytic oxidation is a relatively common method for treating sewage. These methods still need to be further improved due to reasons such as large investment, high cost, and low p...

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Problems solved by technology

[0022] The present invention provides a kind of synthetic method of graphene oxide-cerium oxide-iron oxide composite material and its catalytic degradation performance, to solve practical technical problems such as low catalytic efficiency

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