Preparation method of small-size transition metal chalcogenide two-dimensional nanosheet

A transition metal chalcogenide, two-dimensional nanotechnology, applied in the direction of metal selenide/telluride, binary selenium/tellurium compound, molybdenum sulfide, etc., can solve the problems of large-scale production, large product size, harsh reaction conditions, etc. problems, to achieve the effect of large-scale production, smaller product size, and easy control of the process

Active Publication Date: 2018-08-21
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the steps are cumbersome and time-consuming, the size of the product is large and the uniformity is not good
The disadvantage of this method is that the yield is low and the product uniformity is poor
The disadvantage of this method is that the organic solvent has certain volatility and toxicity, the solvent must be replenished in time during the process, the stripping efficiency of wet ball milling is low, and the product size is large
[0004] So far, the preparation methods of transition metal chalcogenide two-dimensional

Method used

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  • Preparation method of small-size transition metal chalcogenide two-dimensional nanosheet
  • Preparation method of small-size transition metal chalcogenide two-dimensional nanosheet
  • Preparation method of small-size transition metal chalcogenide two-dimensional nanosheet

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Experimental program
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Effect test

Embodiment 1

[0029] (a) Weighing of polymer and transition metal chalcogenide bulk powder

[0030] Weigh 1 g of sodium carboxymethylcellulose powder and 0.1 g of tungsten diselenide powder and add them to a dry stainless steel ball mill jar.

[0031] (b) Peel off by ball milling and mix with water to take out

[0032]Turn on the ball mill, set the total running time to 720 min, the forward and reverse interval time to 60 s, and the grinding speed to 650 rpm. After the grinding is finished, take out the ball mill jar, add 8 ml of ultrapure water, put it back into the ball mill, and run it at a grinding speed of 400 rpm for 15 minutes, then take out the solution, continue to add 8 ml of ultrapure water and repeat the above steps for a total of Five times, the solution was made up to 40 ml.

[0033] (c) Gradient centrifugation to obtain products of different sizes, and purify to remove excess polymers

[0034] Divide 40 ml of the solution obtained in step (b) into two 50 ml centrifuge tube...

Embodiment 2

[0036] (a) Weighing of polymer and transition metal chalcogenide bulk powder

[0037] Weigh 1 g of sodium carboxymethylcellulose powder and 0.1 g of molybdenum disulfide powder and add them to a dry stainless steel ball mill jar.

[0038] (b) Peel off by ball milling and mix with water to take out

[0039] Turn on the ball mill, set the total running time to 720 min, the forward and reverse interval time to 60 s, and the grinding speed to 650 rpm. After the grinding is finished, take out the ball mill jar, add 8 ml of ultrapure water, put it back into the ball mill, and run it at a grinding speed of 400 rpm for 15 minutes, then take out the solution, continue to add 8 ml of ultrapure water and repeat the above steps for a total of Five times, the solution was made up to 40 ml.

[0040] (c) Gradient centrifugation to obtain products of different sizes, and purify to remove excess polymers

[0041] Divide 40 ml of the solution obtained in step (b) into two 50 ml centrifuge tu...

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Abstract

The invention relates to a preparation method of a small-size transition metal chalcogenide two-dimensional nanosheet. The method is characterized in that the powder of a block is treated as a raw material; a polymer is used as an additive, and polymer assistant ball milling is performed to obtain transition metal chalcogenide two-dimensional nanosheets with different sizes and different components. The method comprises three steps of weighing high polymers and polymer assistant ball milling prepared blocky powder; performing ball milling, separating, water adding, uniformly mixing and movingout; performing gradient centrifugation to obtain products with different sizes; purifying to remove excessive polymers. With the adoption of the method, the problems such as low yield, non-uniform appearance and complex processes of a current preparation method of a current small-size transition metal chalcogenide two-dimensional nanosheet can be solved; the method has the advantages of being high in yield, simple in processes, high in generality, easy to control processes,and the like; the prepared small-size transition metal chalcogenide two-dimensional nanosheet can be applied to differentfields, such as the fields of catalyzing, photoelectric and biomedicines.

Description

technical field [0001] The invention relates to a preparation method of two-dimensional nanosheets of transition metal chalcogenides, in particular to a method for preparing two-dimensional nanosheets of transition metal chalcogenides with controllable size through polymer-assisted ball milling, belonging to nanomaterials The field of synthetic technology. Background technique [0002] In recent years, nanomaterials such as two-dimensional transition metal chalcogenide nanosheets (2D TMDCNSs) with graphene-like two-dimensional structure have been developed (Chemical Reviews, 2013, 113, 3766). 2D TMDC NSs are a sandwich structure (MX 2 , M=Mo, W, V, Nb, Ta, Ti, Zr, Hf, etc.; X=S, Se, Te) compound, which has a layered structure, and the metal atoms in the layer and the chalcogenide nonmetal atoms share a common Valence bonding, weak van der Waals force exists between layers, and 2D TMDC NSs can be prepared by breaking the weak force between layers (Chemical Society Reviews, ...

Claims

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Application Information

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IPC IPC(8): C01B19/04C01G39/06B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B19/007C01G39/06C01P2002/72C01P2004/04C01P2004/62C01P2004/64
Inventor 宇文力辉汪联辉朱迪修尉峻张玉倩单京阳李潇
Owner NANJING UNIV OF POSTS & TELECOMM
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