Method for stripping purple phosphorus nanosheet by laser

A laser lift-off and nanosheet technology, applied in chemical instruments and methods, phosphorus, phosphorus compounds, etc., can solve the problems of difficult removal of organic solvents, low yield and small size, and achieve safe preparation process, large output, and small size. Effect

Pending Publication Date: 2021-09-07
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are some disadvantages in the above two methods: although the two-dimensional purple phosphorus nanosheets obtained by the mechanical exfoliation method have large size and small defects, the yield and yield are low; the liquid phase exfoliation method has a high yield but small size, and organic solvents are difficult to remove.

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  • Method for stripping purple phosphorus nanosheet by laser
  • Method for stripping purple phosphorus nanosheet by laser
  • Method for stripping purple phosphorus nanosheet by laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Using 1070nm infrared continuous laser to strip purple phosphorus, the specific preparation steps are as follows:

[0058] (1) Preliminary preparation

[0059] Put purple phosphorus in a glass tube and add 1ml of isopropanol solution with a concentration of 13.5mol / L.

[0060] (2) Purple phosphorus stripping

[0061] Draw the laser irradiation area and movement path, the parameters are as follows: scanning speed 100mm / s, repetition times 1 time, laser power 8000W. Place the glass tube containing the sample in the operating platform for laser irradiation.

[0062] In an argon atmosphere at normal temperature and pressure, the temperature was controlled at 40°C and dried for 12 hours. After laser irradiation, the color of the solution changed from colorless to slightly yellow, which proved that the laser bombarded the surface of purple phosphorus to prepare small-sized purple phosphorus.

Embodiment 2

[0064] Using 1080nm infrared continuous laser to strip purple phosphorus, the specific preparation steps are as follows:

[0065] (1) Preliminary preparation

[0066] Put purple phosphorus in a glass tube and add 50ml of propanol solution with a concentration of 8mol / L.

[0067] (2) Purple phosphorus stripping

[0068] Draw the laser irradiation area and movement path, the parameters are as follows: scanning speed 10mm / s, repetition times 30 times, laser power 2000W. Place the glass tube containing the sample in the operating platform for laser irradiation.

[0069] In an argon atmosphere at normal temperature and pressure, the temperature was controlled at 60°C and dried for 8 hours. After laser irradiation, the color of the solution changed from colorless to slightly yellow, which proved that the laser bombarded the surface of purple phosphorus to prepare small-sized purple phosphorus.

Embodiment 3

[0071] Violet phosphorus was stripped by 1070nm infrared continuous laser. Concrete preparation steps are as follows:

[0072] (1) Preliminary preparation

[0073] Put purple phosphorus in a glass tube, add 100ml deionized water.

[0074] (2) Purple phosphorus stripping

[0075] Draw the laser irradiation area and movement path, the parameters are as follows: scanning speed 3mm / s, repetition times 20 times, laser power 3000W. Place the glass tube containing the sample in the operating platform for laser irradiation.

[0076] In an argon atmosphere at normal temperature and pressure, the temperature was controlled at 80°C and dried for 4 hours. After laser irradiation, small particles precipitated at the bottom of the solution, which proved that the laser bombarded the surface of purple phosphorus to prepare small-sized purple phosphorus but easy to agglomerate.

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Abstract

The invention discloses a method for stripping purple phosphorus nanosheets by laser, and the method adopts a laser method to strip block purple phosphorus, and can simply, quickly and massively prepare few layers of purple phosphorus. Meanwhile, the surface of the block material is bombarded by high-energy laser, and the stripped few-layer purple phosphorus has more active sites; compared with a traditional mechanical method for stripping the purple phosphorus, the yield of stripping the purple phosphorus through the laser is large, and time and labor are saved. Compared with a liquid phase method for stripping the purple phosphorus, the purple phosphorus stripped by the laser is high in quality and small in size. The method is safe in process and can be completed in a normal-temperature and normal-pressure environment.

Description

technical field [0001] The invention belongs to the technical field of inorganic nano preparation, and in particular relates to a method for laser stripping purple phosphorus nanosheets. Background technique [0002] As one of the most abundant elements in the earth's crust, phosphorus has become the cornerstone of social production such as agriculture and industry since its discovery. Human society has a long history of research on phosphorus. It has been found that phosphorus has very rich allotropes, and different structures often bring special physical and chemical properties, which also brings new possibilities for the needs of different fields. . Therefore, phosphorus and its allotropes have long been a research hotspot that has attracted the attention of researchers. [0003] Purple phosphorus, also known as Hittoff's phosphorus, is another layered elemental phosphorus structure of phosphorus and has unique electronic and photoelectric properties. The crystal struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/00
CPCC01B25/003
Inventor 叶晓慧齐明强豪张荔杨艳玲侯小江锁国权冯雷
Owner SHAANXI UNIV OF SCI & TECH
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