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A method for preparing two-dimensional composite materials by exfoliation of nanosheets

A nanosheet, composite material technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of difficult to meet research needs, expensive equipment, low output, etc., and achieve peeling effect. Outstanding, low temperature required, non-toxic effect in environment

Active Publication Date: 2016-09-21
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But both methods have fatal shortcomings: method one, MoS 2 Nanosheets, h-BN nanosheets and WS 2 There are few exfoliation preparation methods such as nanosheets, and the existing methods are difficult to meet the growing research needs; method two, the equipment used for CVD growth is expensive, requires high temperature and high pressure, serious energy consumption, and the output is very low, and it is difficult to meet research needs

Method used

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  • A method for preparing two-dimensional composite materials by exfoliation of nanosheets
  • A method for preparing two-dimensional composite materials by exfoliation of nanosheets
  • A method for preparing two-dimensional composite materials by exfoliation of nanosheets

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Embodiment 1

[0020] This example prepares two-dimensional graphene / MoS 2 Nanocomposite materials, the specific steps are as follows:

[0021] (1) 0.16g (0.001mol) MoS that needs to be stripped 2 Mix evenly with 40ml graphene oxide (Hummer method preparation) aqueous solution, the aqueous solution concentration of graphene oxide is 0.01g / ml;

[0022] (2) The above system was placed in an ultrasonic instrument, and ultrasonically treated for 1 hour with an ultrasonic power of 1500W.

[0023] (3) The product was left to stand for 10 hours, and the upper layer mixture was taken, and 3ml of hydrazine hydrate was added to reduce the graphene oxide. figure 1 Graphene oxide intercalation and exfoliation of two-dimensional sheet MoS 2 mechanism.

[0024] (4) The above-mentioned reduction product is filtered and washed, and vacuum-dried at 50°C to obtain the product graphene / MoS 2 Nanocomposite two-dimensional materials.

[0025] figure 2 The resulting graphene / MoS 2 Atomic force micrograph...

Embodiment 2

[0027] The difference between this embodiment and embodiment 1 is that the MoS that needs to be peeled off in step (1) 2 After mixing with the graphene oxide aqueous solution, let it stand for 1-5 hours to ensure that more single-layer graphene oxide is embedded in the MoS that needs to be exfoliated 2 middle.

Embodiment 3

[0029] The difference between this embodiment and embodiment 1 is that the ultrasonic power in step (2) is increased to more than 2000W.

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Abstract

The invention discloses a method for preparing a two-dimensional composite material by utilizing nanosheet layer peeling. The method comprises the following steps: (1) uniformly mixing a to-be-peeled raw material and a nanosheet layer aqueous solution according to a ratio ranging from 1 mol:600 ml to 1 mol:40,000 ml, wherein the concentration of the nanosheet layer aqueous solution is 0.001-0.01 g / ml; (2) ultrasonically processing a system for 1-48 hours; (3) standing for 1-48 hours to obtain a upper-layer mixed solution; (4) performing suction filtration and washing, and performing vacuum drying at 50-90 DEG C to obtain the two-dimensional composite nanosheet layer material. The method is simple and direct, has the characteristics of outstanding peeling effect, cheap and easily available raw material, non-toxicity on an environment and low required temperature, and does not need complex and expensive instruments or equipment.

Description

technical field [0001] The invention relates to a method for preparing a two-dimensional composite material by exfoliating nanosheets, and belongs to the technical field of two-dimensional nanomaterial preparation. Background technique [0002] 2D nanocomposites such as graphene / MoS 2 (Molybdenum disulfide) nanosheets, graphene / h-BN (hexagonal boron nitride) nanosheets, graphene / WS 2 (Tungsten disulfide) nanosheets have excellent physical and chemical properties, and have broad application prospects in energy storage, laser modulation, fluorescence, catalysis, machinery, etc. Therefore, they have become a research hotspot in the material industry in recent years. Among these 2D composites, graphene / MoS 2 The nanocomposite structure, which is the most detailed study in terms of structure and performance, is a micron-scale MoS grown hydrothermally on the basis of graphene. 2 ball. Nonetheless, such composite structures typically highlight the micron-scale MoS 2 properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01G39/06B82Y30/00
Inventor 郝霄鹏赵刚吴拥中
Owner SHANDONG UNIV