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Bismuthene nanosheet and preparing method thereof

A technology of bismuthene nanometers and nanosheets, applied in the field of bismuthene nanosheets and its preparation, can solve the problems of low yield of bismuthene materials, unsuitability for commercial production, and cumbersome operation, and achieve uniform size and low toxicity , the effect of prolonging the ultrasonic time

Active Publication Date: 2018-07-17
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the yield of the sheet-like bismuthene material prepared by the mechanical exfoliation method is low, which is not suitable for commercial production, and the operation is cumbersome and time-consuming; while the amount of bismuthene prepared by the chemical vapor deposition method is small, and it is not easy to repeat

Method used

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  • Bismuthene nanosheet and preparing method thereof
  • Bismuthene nanosheet and preparing method thereof
  • Bismuthene nanosheet and preparing method thereof

Examples

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Embodiment 1

[0046] A preparation method of bismuthene nanosheets, comprising the following steps:

[0047] (1) Take a Shu Niu glass bottle with a capacity of 250mL, fill it with 120mL of NMP solvent, and then add 120mg of 200 mesh (200 grains / square inch, that is, a particle size of 0.074mm) bismuth powder to obtain the initial concentration of bismuth powder 1mg / mL (or 1000ppm) dispersion;

[0048] (2) Put the glass bottle in (1) into Xinzhi Ultrasonic Constant Temperature Cleaner SBL-22DT, and perform water bath ultrasonication for 3 hours at a constant temperature of 10°C with 70% of the maximum power (600W) (that is, with a power of 420W);

[0049] After ultrasonication in a water bath, place the resulting solution in a BILON-1800Y cell disruptor (maximum power of 1800W), and perform probe ultrasonication at 4°C with a power of 60% (that is, a power of 1080W) for 24 hours to obtain the first ultrasonic wave. liquid;

[0050] Then put the first ultrasonic liquid into the Xinzhi ultraso...

Embodiment 2

[0054] A preparation method of bismuthene nanosheets, comprising the following steps:

[0055] (1) Take a Shu Niu glass bottle with a capacity of 500mL, fill it with 400mL of NMP solvent, and then add 200mg of 300 mesh bismuth powder to obtain a dispersion with an initial concentration of bismuth powder of 0.5mg / mL;

[0056] (2) Put the glass bottle in (1) into Xinzhi ultrasonic constant temperature cleaning machine SBL-22DT, and perform water bath ultrasonication at a constant temperature of 4°C with a power of 480W for 2 hours;

[0057] After ultrasonication in the water bath, place the obtained solution in a BILON-1800Y cell disruptor (maximum power of 1800W), and perform probe ultrasonication with 75% power (ie, power of 1350W) for 15 hours to obtain the first ultrasonic solution;

[0058] Then put the first ultrasonic liquid into the Xinzhi ultrasonic constant temperature cleaning machine SBL-22DT, and perform the second ultrasonic bath in a water bath with a power of 450...

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Abstract

The invention provides a preparing method of a bismuthene nanosheet. The method comprises the steps that firstly, bismuth powder is dispersed in an organic solvent, and dispersion liquid is obtained;secondly, the dispersion liquid is subject to first-time water bath ultrasonic treatment, probe type ultrasonic treatment is carried out, first ultrasonic liquid is obtained, the first ultrasonic liquid is subject to second-time water bath ultrasonic treatment, and second ultrasonic liquid is obtained; thirdly, the second ultrasonic liquid is subject to ultra-low speed centrifugation under 2000 to4000 rpm, a liquid supernatant is collected, the liquid supernatant is subject to low-speed centrifugation under 5000 to 7000 rpm, sediment is collected, and the obtained sediment is the bismuthene nanosheet. The method is simple in process and easy to operate, reproducibility is good, and the controllable-size bismuthene nanosheet with the good single dispersibility is easily manufactured. The invention further provides the manufactured bismuthene nanosheet.

Description

technical field [0001] The invention relates to the field of two-dimensional materials, in particular to a bismuthene nanosheet and a preparation method thereof. Background technique [0002] Two-dimensional materials refer to materials in which electrons can only move freely (planar motion) on the non-nano scale (1-100nm) in two dimensions, such as nano-films. Two scientists from the University of Manchester, Andre Geim and Kostya Novoselov, first made graphene in 2004 by the adhesive tape method. Since then, black phosphorus (phosphorene), silicene, germanene, antimonene, boron nitride, molybdenum disulfide, and a series of quasi-two-dimensional materials with only a single atomic layer thickness have been discovered one after another. [0003] Bismuthene is a two-dimensional material exfoliated from bulk metal bismuth, which has a graphene-like structure. However, bismuthene is a direct bandgap semiconductor with an energy gap of 0.306eV (the bottom of the conduction ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04B82Y30/00B82Y40/00B22F1/054B22F1/068
CPCB82Y30/00B82Y40/00B22F9/04B22F1/0551B22F1/068B22F1/054B22F1/056
Inventor 张晗黄浩
Owner SHENZHEN UNIV
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