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A method for simultaneously preparing molybdenum disulfide quantum dots and electromagnetic wave absorbers by a bipolar electrochemical method

A molybdenum disulfide and quantum dot technology is applied in chemical instruments and methods, other chemical processes, electrolytic components, etc., to achieve the effects of simple device and production process and low synthesis cost

Active Publication Date: 2021-02-09
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

One BPE can act as anode and cathode at the same time, that is, oxidation and reduction reactions can occur at both ends of the electrode respectively. This method has the advantages of simple device, easy operation, and not limited by the shape of the conductor. Using this method, large The granular conductor material is electrolyzed into nanometer-sized particles, so it is inferred that this method can be applied to the electrolysis of two-dimensional materials whose conductor shape is powder. However, the method for preparing molybdenum disulfide quantum dots based on bipolar electrochemical methods has not been reported yet. In recent years, with the explosive development of information technology, more and more serious electromagnetic interference (EMI) pollution has attracted widespread attention to efficient microwave absorbing materials. The simultaneous preparation of molybdenum disulfide quantum dots and materials with excellent electromagnetic wave absorption properties by electrochemical methods is of great significance and application value

Method used

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  • A method for simultaneously preparing molybdenum disulfide quantum dots and electromagnetic wave absorbers by a bipolar electrochemical method
  • A method for simultaneously preparing molybdenum disulfide quantum dots and electromagnetic wave absorbers by a bipolar electrochemical method
  • A method for simultaneously preparing molybdenum disulfide quantum dots and electromagnetic wave absorbers by a bipolar electrochemical method

Examples

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Embodiment 1

[0032] The specific process of the method for simultaneously preparing molybdenum disulfide quantum dots and electromagnetic wave absorbers by the bipolar electrochemical method involved in this embodiment is carried out according to the steps:

[0033] S1, using an area of ​​1.0cm 2 Platinum sheet electrodes are used as the cathode platinum sheet 4 and the anode platinum sheet 5 in the electrochemical method, the cathode platinum sheet 4 and the anode platinum sheet 5 are respectively connected to the power supply negative pole 3 and the power supply positive pole 2, and the power supply negative pole 3 and the power supply positive pole 2 are connected to the power supply 1 ;

[0034] S2. Put 30mL, 0.2M, phosphate buffer solution with pH=7.4 as the electrolyte 7 and 0.173g molybdenum disulfide into the 50mL beaker 6, turn on the power supply 1, and implement With a DC constant voltage of 5.0V, add a magnetic stirrer 8 to stir and react at a speed of 500 r / min for 20 hours, ...

Embodiment 2

[0036] Example 2: Application of molybdenum disulfide quantum dots in fluorescent dyeing

[0037] This example verifies the application of the molybdenum disulfide quantum dots prepared in Example 1 in fluorescent dyeing. When coated on cotton fibers, MoS 2 Quantum dots exhibit good excitation wavelength-dependent fluorescence, making them valuable fluorescent dyes. When cotton fibers use MoS 2 When the quantum dot aqueous suspension is dyed, it is rinsed with water and then dried in air at 50°C. The excitation wavelength-dependent fluorescence of cotton fibers and silk fibers was observed with an inverted fluorescence microscope. Under the excitation of green, ultraviolet and blue light, silk fibers and cotton fibers showed red, blue and green dyeing, such as Figure 4 As shown, this result confirms that the as-prepared MoS 2 Quantum dots can be used as valuable fluorescent dyes for chemically or biocompatible staining.

Embodiment 3

[0038] Example 3: Application of molybdenum disulfide quantum dots in cell imaging and cytotoxicity testing

[0039] This embodiment verifies the application of the molybdenum disulfide quantum dot solution prepared in Example 1 in cell imaging. First, bamboo fiber cells (106 cells / sample) are placed on a square glass slide with a side length of 35 mm to prepare quantum dots containing molybdenum disulfide. Spot the fresh DMEM solution with a solution concentration of 1 / 10, and incubate the bamboo fiber cells with the prepared DMEM solution at 37°C for 4-24 hours to obtain the incubated cells; then at room temperature, wash all the incubated cells with phosphate buffer solution three times to remove excess For the unabsorbed molybdenum disulfide quantum dots, the 360nm Ar ion laser is selected to excite the incubated cells, and the images of the incubated cells are collected by a LEICA TCSSP2 laser scanning confocal microscope, and the cell imaging of a fixed area that changes ...

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Abstract

The invention belongs to the technical field of preparing molybdenum disulfide quantum dots and electromagnetic wave absorbers simultaneously, in particular to a method for simultaneously preparing molybdenum disulfide quantum dots and electromagnetic wave absorbers by a bipolar electrochemical method, using PBS solution as a buffer electrolyte , add molybdenum disulfide powder to the PBS solution as a precursor, mix it and put it into a beaker; put two Pt electrodes in the beaker, and apply a voltage of 3-15V, and react for 3 hours or more, the whole reaction process beaker Place it on the magnetic stirrer all the time, stir through the rotation of the magnet to obtain the mixed product after the reaction; the mixed product after the reaction is centrifuged and separated, that is, a colorless dispersion containing molybdenum disulfide quantum dots can be obtained, and at the same time separated to obtain The precipitate was dried by cold air to obtain gray-black solid powder, that is, molybdenum disulfide electromagnetic wave absorber; the preparation method is ingeniously conceived, the preparation process is simple, and the whole process is green and pollution-free, the application environment is friendly, and the market prospect is broad.

Description

Technical field: [0001] The invention belongs to the technical field of simultaneously preparing molybdenum disulfide quantum dots and electromagnetic wave absorbers, and relates to a top-down process for preparing molybdenum disulfide quantum dots and electromagnetic wave absorbing materials based on a double-electrode electrochemical method, in particular to a method for preparing molybdenum disulfide quantum dots and electromagnetic wave absorbing materials. A method for simultaneously preparing molybdenum disulfide quantum dots and an electromagnetic wave absorber by a bipolar electrochemical method. Background technique: [0002] Recently, with the discovery and extensive study of graphene, other two-dimensional (2D) layered materials such as hexagonal boron nitride, transition metal dichalcogenides, and metal halides have been Things have also received much attention. Molybdenum disulfide (MoS 2 ) belonging to the newly emerged two-dimensional crystal family VIB tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/01C25B1/50C09K11/68C09K3/00B82Y20/00B82Y40/00G01N21/64
CPCB82Y20/00B82Y40/00C09K3/00C09K11/681G01N21/6428G01N21/6456
Inventor 牛玉生李杨许元红
Owner QINGDAO UNIV
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