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Preparation method of Fe3O4@ZnO@N-C composite photocatalysis material

A technology of composite photocatalysis and raw materials, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as unsatisfactory cost, complicated process, and degradation ability to be improved, so as to improve photocatalysis Degradation efficiency and recycling rate, large specific surface area, and the effect of improving photocatalytic degradation performance

Inactive Publication Date: 2019-04-26
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation and reuse of the current ZnO composite photocatalysts still have technical problems such as unsatisfactory cost, complicated process, and improvement of degradation ability to be solved urgently.

Method used

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  • Preparation method of Fe3O4@ZnO@N-C composite photocatalysis material
  • Preparation method of Fe3O4@ZnO@N-C composite photocatalysis material
  • Preparation method of Fe3O4@ZnO@N-C composite photocatalysis material

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Embodiment 1

[0035] In this embodiment, see Figure 1 ~ Figure 5 , A Fe 3 O 4 The preparation method of @ZnO@N-C composite photocatalytic material includes the following steps:

[0036] a. Synthetic Fe 3 O 4 Magnetic nanoparticle materials:

[0037] Take 1.5g FeCl 3 ·6H 2 O, 0.8g of sodium citrate and 4.0g of anhydrous sodium acetate were added to 100mL of alcoholic solvent, stirred for 30min to make it completely dissolved and mixed, and then the resulting mixed solution was transferred to the reactor and heated at 160℃ for 7h. Hydrothermal reaction produces a mixture of hydrothermal products, and then magnetically separates them to obtain a black product. Then the product is washed three times with ethanol and distilled water, and then the solid obtained is vacuum dried for 8 hours to obtain Fe 3 O 4 Magnetic nanoparticle materials;

[0038] b. Synthetic Fe 3 O 4 @ZnO material:

[0039] Take 1.8g of Zn(Ac) 2 ·H 2 O and 0.6g NaOH are each dissolved in 40mL distilled water to obtain Zn(Ac) 2 ·H 2...

Embodiment 2

[0051] This embodiment is basically the same as the first embodiment, and the special features are:

[0052] In this embodiment, a Fe 3 O 4 The preparation method of @ZnO@N-C composite photocatalytic material includes the following steps:

[0053] a. Synthetic Fe 3 O 4 Magnetic nanoparticle materials:

[0054] Take 2.0g FeCl 3 ·6H 2 O, 0.6g of sodium citrate and 3.6g of anhydrous sodium acetate were added to 100mL of alcoholic solvent, stirred for 30min to make it completely dissolved and mixed, and then the resulting mixed solution was transferred to the reactor and heated at 150℃ for 8h. Hydrothermal reaction to obtain a mixture of hydrothermal products, and then magnetic separation to obtain a black product, and then the product was washed three times with ethanol and distilled water, and then the obtained solid was vacuum-dried for 8 hours, that is, Fe 3 O 4 Magnetic nanoparticle materials;

[0055] b. Synthetic Fe 3 O 4 @ZnO material:

[0056] Take 2.0g of Zn(Ac) 2 ·H 2 O and 0.7g...

Embodiment 3

[0065] This embodiment is basically the same as the previous embodiment, and the special features are:

[0066] In this embodiment, a Fe 3 O 4 The preparation method of @ZnO@N-C composite photocatalytic material includes the following steps:

[0067] a. Synthetic Fe 3 O 4 Magnetic nanoparticle materials:

[0068] Take 2.5g FeCl 3 ·6H 2 O, 0.68g of sodium citrate and 4.4g of anhydrous sodium acetate were added to 100mL of alcoholic solvent, stirred for 30min to completely dissolve and mix, then transfer the resulting mixed solution to the reactor, and heat at 190℃ for 6h. Hydrothermal reaction to obtain a mixture of hydrothermal products, and then magnetic separation to obtain a black product, and then the product was washed three times with ethanol and distilled water, and then the obtained solid was vacuum-dried for 8 hours, that is, Fe 3 O 4 Magnetic nanoparticle materials;

[0069] b. Synthetic Fe 3 O 4 @ZnO material:

[0070] Take 1.5g of Zn(Ac) 2 ·H 2 O and 0.5g of NaOH are each d...

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Abstract

The invention discloses a preparation method of a Fe3O4@ZnO@N-C composite photocatalysis material. The preparation method comprises the steps of taking Fe3O4 magnetic nanoparticle in a controllable submicron size as a carrier, preparing a Fe3O4@ZnO composite catalyst, depositing a metal organic framework material ZIF-8 on an outer layer of Fe3O4@ZnO by a complexing effect between Zn2+ and di-methylimidazole to prepare a Fe3O4@ZnO@ZIF-8 composite with a multiple core-shell structure, and converting ZIF-8 into ZnO and nitrogen doped carbon through a heat treatment technology. The prepared composite has good photocatalytic degradation performance and stable recycling performance; a recovery rate is increased; and the composition of a photo-induced electron-hole pair is reduced. The prepared composite can be used for degrading organic pollutants in sewage and increasing photocatalytic degradation efficiency and a recycling rate.

Description

Technical field [0001] The invention relates to a preparation method of a composite photocatalyst, in particular to a preparation method of a ZnO composite photocatalyst, which is applied to the technical field of photocatalytic material preparation technology. Background technique [0002] Due to the rapid development of the manufacturing industry, a large amount of organic dyes in industrial textiles and cosmetics are discharged into rivers and oceans, which seriously damages the environment and ecological balance, so the removal of pollutants becomes particularly important. In 1972, it was reported in TiO 2 The important scientific research of photolysis of water on the electrode is also a sign of the beginning of research on photocatalytic materials. In the field of environmental chemistry, commonly used inorganic semiconductor photocatalytic materials mainly include ZnO, TiO 2 , CdS, ZnS and MoS 2 Wait. ZnO is considered a promising nanomaterial because of its simple prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCC02F1/30B01J27/24C02F2101/308B01J35/39
Inventor 陈志文赵骏如王云胡张军黄守双
Owner SHANGHAI UNIV
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