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Two-dimensional material quantum sheet and preparation method thereof

A two-dimensional material and quantum sheet technology, applied in the field of two-dimensional material quantum sheet and its preparation, can solve problems such as poor versatility, complex preparation process, and difficulty in realizing large-scale production, and achieves low defects, wide sources, and large-scale production. production effect

Inactive Publication Date: 2017-09-26
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a two-dimensional material quantum sheet and its preparation method, which is used to solve the problems in the prior art that the preparation process of the two-dimensional material quantum sheet is complex, poor in versatility, and difficult to achieve large-scale production

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  • Two-dimensional material quantum sheet and preparation method thereof
  • Two-dimensional material quantum sheet and preparation method thereof
  • Two-dimensional material quantum sheet and preparation method thereof

Examples

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Effect test

Embodiment 1

[0049] (1) Mix 1 g of graphite raw material with an average size of about 500 μm, 1 g of silicon dioxide with an average size of 400 nm, and 10 g of agate balls with a diameter of 0.5 mm, and ball mill for 0.5 h.

[0050] (2) Separate the agate balls, add N-methylpyrrolidone (NMP) to prepare a 1 mg / mL dispersion, and then sonicate for 120 h with an ultrasonic power of 50 W.

[0051] (3) The sample after ultrasound is first vacuum filtered, passed through a filter membrane with a pore size of 0.02 μm, and then the filtrate is centrifuged. The centrifugal speed is 500r / min, and the centrifugation time is 120min, that is, the graphene quantum sheet NMP dispersion is obtained. liquid.

[0052] figure 1 Be the optical micrograph of graphite raw material in embodiment 1. Depend on figure 1 It can be seen that its size is about 500 μm.

[0053] figure 2 It is the appearance photo of the graphene quantum sheet NMP dispersion liquid prepared in embodiment 1. Depend on figure 2...

Embodiment 2

[0056] (1) 0.1 g of MoS with an average size of 2 μm 2 Raw materials, 10g of aluminum oxide with an average size of 100nm and 100g of stainless steel balls with a diameter of 20mm were mixed, and ball milled for 120h.

[0057] (2) Separate the stainless steel balls, add NMP to prepare a 50mg / mL dispersion, and then sonicate for 0.5h with an ultrasonic power of 1000W.

[0058] (3) The sample after ultrasonication is first vacuum filtered, passed through a filter membrane with a pore size of 0.02 μm, and then the filtrate is centrifuged at a speed of 10000r / min, and the centrifugation time is 1min, to obtain MoS 2 NMP dispersion of quantum flakes.

Embodiment 3

[0060] (1) Mix 0.01 g of hexagonal boron nitride raw material with an average size of 100 μm, 0.1 g of titanium dioxide with an average size of 500 nm, and 10 g of zirconia balls with a diameter of 6 mm, and ball mill for 20 h.

[0061] (2) The zirconia balls were then separated, and isopropanol was added to form a 10 mg / mL dispersion, which was then sonicated for 5 hours at an ultrasonic power of 200W.

[0062] (3) The sample after ultrasonication is first vacuum filtered, passed through a filter membrane with a pore size of 0.02 μm, and then the filtrate is centrifuged at a speed of 5000r / min, and the centrifugation time is 20min, and the hexagonal boron nitride quantum chip is obtained isopropanol dispersion.

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Abstract

The invention belongs to the technical field of inorganic nanometer material preparation, and relates to a two-dimensional material quantum sheet and a preparation method thereof. Through the process, inorganic matters with the proper particle diameter are firstly used as auxiliary agents for ball milling; then, solvents are added for ultrasonic processing; finally, suction filtration is performed; filter liquid is centrifuged. The uniform and stable dispersion liquid of the two-dimensional material quantum sheet is obtained; the sheet layer dimension of the quantum sheet is between 1nm and 20 nm; the layer number is one to ten. Compared with the existing method, the method has the advantages that the resources are wide; the operation is simple and convenient, and the like. The prepared quantum sheet maintains the intrinsic property; the defects are few; the yield is very high; the two-dimensional material quantum sheet is hopeful to realize the mass production.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, and relates to a two-dimensional material quantum sheet and a preparation method thereof. Background technique [0002] In 2004, Andre Geim and Konstantin Novoselov obtained single-layer graphene by mechanical exfoliation for the first time, and then two-dimensional materials represented by graphene were gradually recognized and utilized by people. Among them, in addition to graphene, representative two-dimensional materials include hexagonal boron nitride, transition metal dichalcogenides (TMDs), graphitic carbon nitride (g-C 3 N 4 ), two-dimensional transition metal carbides or carbonitrides (MXenes), black phosphorus, etc. [0003] As a novel and unique material, two-dimensional materials have attracted more and more research interests. How to realize the large-scale preparation of single-layer or few-layer two-dimensional materials has naturally become o...

Claims

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Application Information

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IPC IPC(8): C01B32/19C01G39/06C01B21/064C01B32/921C01B21/082C01B25/00
CPCC01B21/0605C01B21/0648C01B25/003C01G39/06C01P2004/04C01P2004/20C01P2004/64
Inventor 张勇韩春春
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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