Preparation method of graphene-rare earth doped zinc oxide nano ceramic microfiltration membrane composite material

Abstract

The invention relates to the field of inorganic materials, in particular to a preparation method of a graphene-rare earth doped zinc oxide nano ceramic microfiltration membrane composite material, which comprises the following steps: preparing cerium and yttrium modified zinc oxide; modifying cerium and yttrium modified zinc oxide with graphene to obtain graphene-rare earth doped zinc oxide, mixing the graphene-rare earth doped zinc oxide obtained by modifying the cerium and yttrium modified zinc oxide with graphene with a ceramic substrate, and conducting pressing to form the membrane. According to the invention, the application field of the graphene-cerium and yttrium co-doped zinc oxide ceramic microfiltration membrane nano composite material is widened, and the graphene-cerium and yttrium co-doped zinc oxide ceramic microfiltration membrane is assembled by adopting a simple and feasible method; and the invention relates to a photodegradation method, and the technical problem of secondary pollution of the ceramic microfiltration membrane is solved. The composite material has wide application value in the fields of oil field water treatment, sewage treatment, oil-water separation and the like.

Description

technical field

[0001] The invention relates to the field of inorganic materials, in particular to a method for preparing a graphene-rare earth doped zinc oxide nano ceramic microfiltration membrane composite material.

[0002] technical background

[0003] With the rapid development of modern industry, the problem of water pollution is becoming more and more serious. Among all kinds of pollutants in water, oil and other organic substances cause serious damage to the water environment and cause huge economic losses. Therefore, timely and efficient treatment of oily wastewater for recycling becomes increasingly important. At present, the main methods for treating oily wastewater at home and abroad are: biodegradation, chemical treatment, physical treatment, etc.

[0004] Membrane materials for oil-water separation can be mainly divided into organic membranes and ceramic membranes. In the process of oil-water separation, the organic membrane is susceptible to swelling and de...

Examples

Embodiment 1

[0028] A graphene-cerium, yttrium co-doped zinc oxide ceramic microfiltration membrane composite material, comprising:

[0029] (1) Preparation of cerium and yttrium co-doped zinc oxide: In this experiment, 9.3 grams of zinc acetate was dissolved in 50 milliliters of ethylene glycol and in the stabilizer ethanolamine solution equimolar with zinc acetate, stirred while heating, at 70 Stir at ℃ for 1 hour to form a uniform transparent solution, then add 0.5 g of yttrium acetate, continue stirring for 2 hours, and let it stand for 12 hours. Dissolve 0.2 g of cerium acetate in 10 ml of ethylene glycol and stir while heating , stirred at 80°C for 1 hour to prepare solution A. Add a certain amount of A solution to B solution dropwise at 70°C and stir for 1 hour to obtain a solution of cerium and yttrium co-doped with zinc oxide, and bake it in a 100°C oven Dry in medium for 10-60 minutes, then put it into a muffle furnace and slowly heat it to 400-600°C, keep it for 2 hours, then co...

experiment example 1

[0039] Observe the SEM of the prepared graphene-cerium, yttrium co-doped zinc oxide ( figure 1 ) and TEM ( figure 2 ) shape. It can be seen that cerium and yttrium co-doped zinc oxide are uniformly distributed on the surface of graphene.

experiment example 2

[0041] The water from the same water source was filtered by using the microfiltration membrane obtained in each embodiment and comparative example. Measure the content of Escherichia coli in the water after one month of filtration, and judge the filtration effect of the filter membrane by the content of Escherichia coli, the results are shown in the table below.

[0042]

[0043]

[0044] It can be seen from the above table that the degree of filtration of water by each group of filter membranes is the same one month ago. However, after one month of sunlight exposure, the filtering effect of Escherichia coli in the comparison group decreased to a higher degree than that in the example group. It shows that due to the strong photocatalytic degradation and sterilization effect of graphene / rare earth doped zinc oxide in the filter membrane of the implementation group, no secondary pollution will be generated, while the secondary pollution of the filter membrane will be gener...

technical field

[0001] The invention relates to the field of inorganic materials, in particular to a method for preparing a graphene-rare earth doped zinc oxide nano ceramic microfiltration membrane composite material.

[0002] technical background

[0003] With the rapid development of modern industry, the problem of water pollution is becoming more and more serious. Among all kinds of pollutants in water, oil and other organic substances cause serious damage to the water environment and cause huge economic losses. Therefore, timely and efficient treatment of oily wastewater for recycling becomes increasingly important. At present, the main methods for treating oily wastewater at home and abroad are: biodegradation, chemical treatment, physical treatment, etc.

[0004] Membrane materials for oil-water separation can be mainly divided into organic membranes and ceramic membranes. In the process of oil-water separation, the organic membrane is susceptible to swelling and de...

Examples

Embodiment 1

[0028] A graphene-cerium, yttrium co-doped zinc oxide ceramic microfiltration membrane composite material, comprising:

[0029] (1) Preparation of cerium and yttrium co-doped zinc oxide: In this experiment, 9.3 grams of zinc acetate was dissolved in 50 milliliters of ethylene glycol and in the stabilizer ethanolamine solution equimolar with zinc acetate, stirred while heating, at 70 Stir at ℃ for 1 hour to form a uniform transparent solution, then add 0.5 g of yttrium acetate, continue stirring for 2 hours, and let it stand for 12 hours. Dissolve 0.2 g of cerium acetate in 10 ml of ethylene glycol and stir while heating , stirred at 80°C for 1 hour to prepare solution A. Add a certain amount of A solution to B solution dropwise at 70°C and stir for 1 hour to obtain a solution of cerium and yttrium co-doped with zinc oxide, and bake it in a 100°C oven Dry in medium for 10-60 minutes, then put it into a muffle furnace and slowly heat it to 400-600°C, keep it for 2 hours, then co...

experiment example 1

[0039] Observe the SEM of the prepared graphene-cerium, yttrium co-doped zinc oxide ( figure 1 ) and TEM ( figure 2 ) shape. It can be seen that cerium and yttrium co-doped zinc oxide are uniformly distributed on the surface of graphene.

experiment example 2

[0041] The water from the same water source was filtered by using the microfiltration membrane obtained in each embodiment and comparative example. Measure the content of Escherichia coli in the water after one month of filtration, and judge the filtration effect of the filter membrane by the content of Escherichia coli, the results are shown in the table below.

[0042]

[0043]

[0044] It can be seen from the above table that the degree of filtration of water by each group of filter membranes is the same one month ago. However, after one month of sunlight exposure, the filtering effect of Escherichia coli in the comparison group decreased to a higher degree than that in the example group. It shows that due to the strong photocatalytic degradation and sterilization effect of graphene / rare earth doped zinc oxide in the filter membrane of the implementation group, no secondary pollution will be generated, while the secondary pollution of the filter membrane will be gener...

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