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Preparation method of metal oxide two-dimensional material nanosheet with controllable size

A technology of two-dimensional materials and oxides, applied in chemical instruments and methods, titanium oxide/hydroxide, iron compounds, etc., can solve the problem of expensive production of two-dimensional materials, restrictions on the wide application of two-dimensional materials, and the adoption of graphene, etc. problems, to achieve the effect of excellent photochemical properties, low cost and simple operation

Pending Publication Date: 2022-08-02
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly limits the wide application of two-dimensional materials in production and life.
And the production cost of two-dimensional materials is very expensive
It is known that the price of one kilogram of graphene oxide nanosheets sold in the market is about 10,000 yuan. At present, only graphene has been industrialized, and the industrial preparation method of graphene cannot be compared with other two-dimensional materials. use
This has led to a large gap in the field of practical application of two-dimensional materials.

Method used

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  • Preparation method of metal oxide two-dimensional material nanosheet with controllable size
  • Preparation method of metal oxide two-dimensional material nanosheet with controllable size
  • Preparation method of metal oxide two-dimensional material nanosheet with controllable size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The ratio of potassium carbonate, lithium carbonate and titanium dioxide is 2.4:0.81:10.36 according to the substance, configure one kilogram of the original mixture (that is, titanium oxide precursor), configure multiple parts, mix them evenly, and take out a small amount of mixture to make the heat of the mixture. Repeat the curve and plan the temperature segment.

[0047] The total thermogravimetric curve of the mixture is figure 1 As shown, the thermogravimetric curves of the mixture at different temperatures are as follows figure 2 shown.

Embodiment 2

[0049] On the basis of embodiment 1, get three parts of one kilogram of original mixture to do three groups of experiments, respectively carry out the following operations:

[0050] One kilogram of the original mixture was put into a muffle furnace, heated at 650° C. for 5 hours, taken out and ground after the sintering was completed, and the residual gas in the mixture was exhausted. The mixture was then put into a muffle furnace, heated at 750° C. for 4 hours, taken out and ground after the sintering was completed, and the residual gas in the mixture was exhausted. The temperature was adjusted to 800°C, and the final sintering time of the three groups of mixtures was designed to be 2h, 10h, and 14h, respectively, to obtain the original two-dimensional layered material. After that, it was acidified by adding 500 mL of 1 mol / L hydrochloric acid for 7 days, and a new acid solution was added every replacement day, and the powder was separated by filtration to obtain a protonated...

Embodiment 3

[0055] On the basis of Example 2, the concentration of the solution was designed in the stripping of the organic base, and the volumes of water added were 2L, 4L, and 8L, respectively. Other steps are the same as in Example 2. Finally, two-dimensional materials were successfully prepared.

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Abstract

The invention discloses a preparation method of a metal oxide two-dimensional material nanosheet with a controllable size. The method comprises the following steps: weighing original oxides according to a proportion, fully grinding an original oxide mixture, carrying out thermogravimetric analysis, and designing a first-stage sintering temperature and a second-stage sintering temperature according to a thermogravimetric curve; the preparation method comprises the following steps: preparing not more than 1kg of an original oxide mixture according to a ratio, putting the original oxide mixture into a heating device, and heating at a selected temperature to obtain a metal oxide original layered material; and performing protonation and organic alkali stripping on the obtained metal oxide original layered material to obtain the metal oxide two-dimensional material nanosheet. According to the method disclosed by the invention, generated gases such as carbon dioxide are effectively treated by adopting a special heat treatment method, the final layered material can be controllably prepared from a small size to a large size, and batch kilogram-level preparation of the two-dimensional material is realized.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method of size-controllable metal oxide two-dimensional material nanosheets. Background technique [0002] The preparation and synthesis of two-dimensional materials is a hot research topic at present. Two-dimensional material nanosheets have broad application prospects in many fields due to their ultrathin structure and unique physical and chemical properties. Compared with the exfoliation methods of two-dimensional materials that are emerging in an endless stream, there is little research on controlling the growth size of two-dimensional materials. This is mainly because two-dimensional materials are greatly affected by temperature and time during growth, and these two variables are difficult to control during the growth process. Compared with larger-sized two-dimensional material nanosheets, small-sized two-dimensional material nano...

Claims

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Application Information

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IPC IPC(8): C01G49/00C01G23/04C01G45/02C01G51/00C01G33/00B82Y40/00
CPCC01G49/00C01G23/04C01G45/02C01G51/00C01G33/00B82Y40/00C01P2004/20C01P2002/88C01P2002/72C01P2004/03C01P2004/01Y02E60/13C01G23/08C01G23/005C01P2004/24C01P2004/62
Inventor 蔡兴科
Owner SHENZHEN UNIV
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