Electrochemical preparation method of black phosphorus quantum dots

A black phosphorus quantum and electrochemical technology, applied in the field of nanomaterial preparation, can solve the problems of time-consuming and energy-consuming, low yield, difficult to control the size of quantum dots, etc., achieve uniform size, high scalability, and avoid insufficient ultrasonic energy efficiency Effect

Inactive Publication Date: 2016-05-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current preparation of black phosphorus quantum dots still adopts the method of ultrasonic preparation, which consumes time and energy, has low yield, and is difficult to control the size of quantum dots.

Method used

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  • Electrochemical preparation method of black phosphorus quantum dots
  • Electrochemical preparation method of black phosphorus quantum dots
  • Electrochemical preparation method of black phosphorus quantum dots

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) First, the black phosphorus crystal was fixed on a metal rod with conductive glue as a working electrode, and a platinum electrode was used as a counter electrode. The two were placed in an organic solvent containing an electrolyte, and the temperature of the solvent was kept at 10°C. The organic solvent used is N,N-dimethylformamide (DMF), and the electrolyte is 0.5M lithium chloride.

[0018] (2) Then connect the working electrode and the counter electrode to the positive and negative poles of the DC power supply respectively, apply a voltage of 7V, use the electrolyte ions to migrate to the black phosphorus crystal and undergo electrochemical intercalation reaction, resulting in the decomposition of the black phosphorus crystal to form quantum dot dispersion liquid.

[0019] (3) Centrifuge the obtained black phosphorus quantum dot dispersion at a rotational speed of 1500 rpm, and take the stable supernatant to obtain quantum dots with an average diameter of 3 nm....

Embodiment 2

[0021] (1) First, the black phosphorus crystal was fixed on the metal rod with conductive glue as the working electrode, and the platinum electrode was used as the counter electrode. The two were placed in an organic solvent containing electrolyte, and the temperature of the solvent was kept at 20 °C. The organic solvent used is N,N-dimethylformamide (DMF), and the electrolyte is 1M lithium chloride.

[0022] (2) Then connect the working electrode and the counter electrode to the positive and negative poles of the DC power supply respectively, apply a voltage of 10V, use the electrolyte ions to migrate to the black phosphorus crystal and undergo electrochemical intercalation reaction, resulting in the decomposition of the black phosphorus crystal to form quantum dot dispersion liquid.

[0023] (3) Centrifuge the obtained black phosphorus quantum dot dispersion at a rotational speed of 1500 rpm, and take the stable supernatant to obtain quantum dots with an average diameter of ...

Embodiment 3

[0025] (1) First, the black phosphorus crystal was fixed on the metal rod with conductive glue as the working electrode, and the platinum electrode was used as the counter electrode. The two were placed in an organic solvent containing electrolyte, and the temperature of the solvent was kept at 35 °C. The organic solvent used is N,N-dimethylformamide (DMF), and the electrolyte is 1.5M lithium chloride.

[0026] (2) Then connect the working electrode and the counter electrode to the positive and negative poles of the DC power supply respectively, apply a voltage of 12V, use the electrolyte ions to migrate to the black phosphorus crystal and undergo electrochemical intercalation reaction, resulting in the decomposition of the black phosphorus crystal to form quantum dot dispersion liquid.

[0027] (3) Centrifuge the obtained black phosphorus quantum dot dispersion at a rotational speed of 1500 rpm, and take the stable supernatant to obtain quantum dots with an average diameter o...

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Abstract

The invention discloses an electrochemical preparation method of black phosphorus quantum dots. An electrochemical intercalation method is adopted for dissolving black phosphorus crystals in an organic solvent so as to obtain the black phosphorus quantum dots. According to the specific implementation method, firstly, the black phosphorus crystals are fixed to a metal bar through conducting resin to serve as a working electrode, a platinum electrode serves as a counter electrode, and the working electrode and the counter electrode are placed in the organic solvent containing electrolytes; and then, the working electrode is connected to a positive electrode of a direct-current power source, the counter electrode is connected to a negative electrode of the direct-current power source, the voltage within the set range is applied, ion electrolytes are migrated to the black phosphorus crystals, and an electrochemical intercalation reaction is made, so that the black phosphorus quantum dots fall off to the organic solvent from the black phosphorus crystals, and black phosphorus quantum dot dispersion liquid is obtained. The preparation method of the black phosphorus quantum dots has the beneficial effects of being low in cost, capable of carrying out large-scale preparing, high in efficiency and short in production period.

Description

technical field [0001] The invention relates to an electrochemical preparation method of black phosphorus quantum dots. The method utilizes electrolyte ions to undergo intercalation reaction on black phosphorus crystals to form quantum dot dispersion liquid, and belongs to the technical field of nanometer material preparation. Background technique [0002] Two-dimensional nanomaterials such as graphene and transition metal sulfides have shown extraordinary application potential in many fields such as electronics, sensing and optoelectronic devices due to their excellent physical and structural properties. Among them, graphene has been widely studied as the most representative two-dimensional material. It has ultrahigh carrier mobility, but the lack of a band gap has severely hindered the application of graphene in logic semiconductor devices such as field-effect transistors. As a representative member of the transition metal sulfide semiconductor family, molybdenum disulfid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00
CPCC25B1/00
Inventor 徐峰童日汪栋徐希庆陆琰琰倪亚茹闵辉华孙立涛
Owner SOUTHEAST UNIV
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