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A kind of two-dimensional metal oxide nanosheet and its preparation method

An oxide and nanosheet technology, applied in the field of nanomaterials, can solve the problems of low yield of metal oxide nanosheets, insufficient preparation methods, and harsh reaction conditions, so as to avoid uncontrollable growth and avoid further growth. , the effect of good universality

Active Publication Date: 2022-03-18
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes these preparation methods not universal enough, only applicable to specific metals or specific classes of metals
At the same time, due to the harsh reaction conditions, the prepared metal oxide nanosheets usually have low yield and high cost, making it difficult to prepare in large quantities.

Method used

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  • A kind of two-dimensional metal oxide nanosheet and its preparation method
  • A kind of two-dimensional metal oxide nanosheet and its preparation method
  • A kind of two-dimensional metal oxide nanosheet and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1. Preparation of magnesium oxide nanosheets

[0029] (1): 0.1 g of layered graphene framework material is added to 10 milliliters of magnesium nitrate solution with a concentration of 1 mol / liter, soaked and filtered to obtain wet layered graphene framework material particles containing magnesium nitrate solution;

[0030] (2): Add the wet-state layered graphene framework material particles obtained in step (1) into 100 ml of sodium hydroxide solution with a concentration of 0.5 mol / liter, and the precipitate is filtered, washed and dried to obtain the graphene framework material / magnesium hydroxide complex;

[0031] (3): The graphene framework material / magnesium hydroxide composite obtained in step (2) was calcined in air at 500° C. for 2 hours to obtain the final magnesium oxide nanosheets.

[0032] The characterization results of the obtained magnesium oxide nanosheets are shown in the attached figure 1 .

Embodiment 2

[0033] Embodiment 2. Preparation of titanium dioxide nanosheets

[0034] (1): Add 0.1 g of layered graphene framework material to 10 ml of titanyl sulfate aqueous solution with a concentration of 0.1 mol / liter, soak and filter to obtain wet-state layered graphene framework material particles containing titanyl sulfate solution;

[0035] (2): Add the wet-state layered graphene framework material particles obtained in step (1) into 100 ml of sodium hydroxide solution with a concentration of 1 mol / liter, and the precipitate is filtered, washed and dried to obtain the graphene framework material / titanium hydroxide complex;

[0036] (3): The graphene framework material / titanium hydroxide composite obtained in step (2) was calcined in air at 700° C. for 2 hours to obtain the final titanium dioxide nanosheets.

[0037] The characterization results of the obtained titanium dioxide nanosheets are shown in the attached figure 2 .

Embodiment 3

[0038] Embodiment 3. Preparation of ferric oxide nanosheets

[0039] (1): Add 0.1 g of layered graphene frame material to 10 ml of ferric sulfate solution with a concentration of 5 mol / liter, soak and filter to obtain wet layered graphene frame material particles containing ferric sulfate solution;

[0040] (2): Add the wet-state layered graphene framework material particles obtained in step (1) into 100 ml of ammonia solution with a concentration of 1 mol / liter, and the precipitate is filtered, washed and dried to obtain the graphene framework material / hydrogen Iron oxide complex;

[0041] (3): Calcining the graphene framework material / iron hydroxide composite obtained in step (2) at 400° C. in air for 5 hours to obtain the final ferric oxide nanosheets.

[0042] The characterization results of the obtained ferric oxide nanosheets are shown in the attached image 3 .

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Abstract

The invention relates to a two-dimensional metal oxide nanosheet and a preparation method thereof. The method comprises the steps of: immersing the layered graphene frame material particles in a metal salt solution and filtering to obtain wet layered graphene frame material particles containing the metal salt solution; the wet layer graphene frame material particles are deposited The layered graphene framework material / metal oxide precursor composite is obtained by precipitation in the solvent solution and filtered and dried; the layered graphene framework material / metal oxide precursor composite is calcined in air to obtain a two-dimensional metal oxide nanometer piece. Compared with the prior art, the present invention has the characteristics of low cost, high universal applicability, high efficiency, high controllability and mass production. The two-dimensional metal oxide nanosheets prepared by the present invention have an average thickness of 0.5-30 nanometers, a width of 0.1-1000 microns, and a specific surface area of ​​20-500 square meters per gram, which can be used for energy storage and conversion, chemical catalysis, and environmental protection , biomedicine and many other fields.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a two-dimensional metal oxide nanosheet and a preparation method thereof. Background technique [0002] Due to their excellent electrical, optical, thermal, and mechanical properties, metal oxide nanomaterials have broad application potential in the fields of energy, catalysis, materials, environment, electronics, and biomedicine. Metal oxide nanosheets with two-dimensional structure are widely used in the fields of energy, catalysis, and environmental protection due to their high specific surface area, short carrier migration distance, and high activity. [0003] Due to the huge application prospects of two-dimensional metal oxide nanomaterials, there have been more and more researches on the synthesis and shape control of metal oxide nanosheets in recent years, among which how to synthesize non-layered metal oxide nanosheets has become a research topic. focus. At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B13/14C01B13/36C01F5/02C01G23/053C01G49/06C01G45/02C01G9/02B82Y40/00
CPCB82Y40/00C01B13/145C01B13/36C01F5/02C01G9/02C01G23/053C01G45/02C01G49/06C01P2004/04C01P2004/24C01P2006/12C01P2006/16C01P2004/61C01P2004/60C01P2004/64C01P2004/62
Inventor 卢红斌阮英波李梦雄张佳佳赵则栋王灿灿马建华孙敏强
Owner FUDAN UNIV
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