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Lanthanide fluoride two-dimensional porous nanosheet as well as preparation method and application thereof

A lanthanide and fluoride technology, which is applied in the field of lanthanide fluoride two-dimensional porous nanosheets and their preparation, can solve the problems of cumbersome post-processing steps, difficulty in realizing large-scale preparation of two-dimensional materials, etc., so as to avoid pollution. Effect

Active Publication Date: 2018-08-03
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the bottom-to-top synthesis methods, the template method and the surfactant-modulated growth method are two commonly used routes for the preparation of 2D materials, but both preparation routes require tedious post-processing steps to remove templates and surfactants. agent, making it difficult to achieve large-scale preparation of two-dimensional materials

Method used

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  • Lanthanide fluoride two-dimensional porous nanosheet as well as preparation method and application thereof
  • Lanthanide fluoride two-dimensional porous nanosheet as well as preparation method and application thereof
  • Lanthanide fluoride two-dimensional porous nanosheet as well as preparation method and application thereof

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preparation example Construction

[0024] The invention provides a method for preparing a two-dimensional porous nanosheet of lanthanide fluoride, comprising the following steps:

[0025] (1) In a nitrogen atmosphere, the water-soluble lanthanide metal salt lanthanide salt and sodium acetate aqueous solution are mixed to obtain a mixed solution;

[0026] (2) adding an aqueous fluorine-containing salt solution to the mixed solution obtained in the step (1) to undergo a precipitation reaction to obtain a two-dimensional porous nanosheet of lanthanide fluoride.

[0027] The present invention mixes water-soluble lanthanide metal salts and sodium acetate aqueous solution in a nitrogen atmosphere to obtain a mixed liquid. In the present invention, it is preferred to firstly add water into the reaction device, and then pass nitrogen to remove air.

[0028] In the present invention, the water-soluble lanthanide metal salt preferably includes one or more of nitrates, chlorates, chlorides and acetates of lanthanides, mo...

Embodiment 1

[0047] Take pure water (300mL) into a three-necked flask, and after bubbling nitrogen gas for 20min, add 3.6mmol of cerium nitrate and 3.6mmol of sodium acetate solid powder in turn, wherein the molar ratio of cerium nitrate and sodium acetate is 1:1, after stirring and dissolving Add 20mL, 5mg / mL ammonium fluoride aqueous solution to the aqueous solution containing cerium nitrate, keep stirring for 2h, and finally centrifuge and freeze-dry to obtain cerium fluoride (F-Ce) two-dimensional porous nanosheets.

[0048] The field emission electron micrograph of the cerium fluoride (F-Ce) two-dimensional porous nanosheet that makes in the present embodiment is as follows figure 1 As shown in the figure, it can be clearly observed that a large number of two-dimensional nanosheets are stacked together; figure 2 The transmission electron micrograph in the photo confirms again that the product that makes in the present embodiment is cerium fluoride (F-Ce) two-dimensional nanosheet; Ca...

Embodiment 2

[0051] Take 200mL of pure water into a three-necked flask, and after bubbling nitrogen gas for 30min, add 1.2mmol of cerium acetate and 3.6mmol of sodium acetate solid powder in turn, wherein the molar ratio of cerium acetate and sodium acetate is 1:3, and dissolve 50mL of 10 mg / mL sodium fluoride solution was added to the aqueous solution containing cerium acetate, and kept stirring for 4 hours, and finally centrifuged and freeze-dried to obtain cerium fluoride (F-Ce) two-dimensional porous nanosheets.

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Abstract

The invention provides a preparation method of a lanthanide fluoride two-dimensional porous nanosheet, and belongs to the field of novel materials. The method comprises the following steps: mixing water-soluble lanthanide metal salt with a sodium acetate aqueous solution in a nitrogen atmosphere to obtain a mixed solution; adding the aqueous solution of fluorine-containing salts to the mixed solution for precipitation reaction to obtain the lanthanide fluoride two-dimensional porous nanosheet. Additional surfactants or template agents are not needed to be added in the preparation process, pollution of the surfactants on the surface of a preparation material is prevented, the complicated template agent post-treatment step is reduced, large-scale production can be performed, and one-step large-scale preparation of the lanthanide fluoride two-dimensional porous nanosheet constructed by nanoparticles is realized; other organic solvents are not needed, and environmental pollution caused bythe preparation process is prevented.

Description

technical field [0001] The invention relates to the technical field of new material development, in particular to a two-dimensional porous nanosheet of lanthanide fluoride and its preparation method and application. Background technique [0002] Since Andre.K.Geim and Kostya.S.Novoselov, physicists at the University of Manchester in the United Kingdom, stripped graphene through adhesive tape in 2004, the research on two-dimensional materials has become a hot topic in the scientific community (see "Electric fieldeffect in atomically thin carbon films", Andre.K.Geim et al., Science.2004, 306:666~669). In addition to common two-dimensional materials, perovskites, organic nanosheets, peptide molecules, and DNA can all be transformed into new two-dimensional materials through specific methods. [0003] Currently, top-to-bottom exfoliation and bottom-to-top synthesis are two commonly used methods for preparing 2D materials. The top-to-bottom exfoliation method is mainly suitable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B01J20/02B01J20/28B01J20/30B01J27/12B01J35/02B01J35/10B01J37/03H01M50/431
CPCB01J20/027B01J20/28033B01J27/12B01J37/031C01F17/265H01M50/431B01J35/00B01J35/30B01J35/643B01J35/647B01J20/0207B01J20/28007B01J20/28016B01J20/2808B01J20/28083B01J20/3085B01D53/02B01D2253/10B01D2253/304C01P2004/24C01P2004/64C01P2004/04C01P2006/17C01P2006/16C01P2002/77B01J23/83B82Y40/00H01M4/582B82Y30/00Y02E60/10B01D2253/112B01J37/04B01J37/26B01J35/23
Inventor 张玉忠张磊涛李泓
Owner TIANJIN POLYTECHNIC UNIV
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