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Method for preparing germanium selenide two-dimensional materials on basis of solvent thermal intercalation processes

A two-dimensional material, the technology of germanium selenide, applied in the field of preparation of two-dimensional germanium selenide material, can solve the problems that the lateral size and thickness cannot be taken into account at the same time, and the peeling effect is not ideal, and the preparation method is simple and easy to operate. Effect

Inactive Publication Date: 2018-12-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the peeling effect is not ideal, and the requirements for lateral size and thickness cannot be taken into account at the same time.

Method used

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  • Method for preparing germanium selenide two-dimensional materials on basis of solvent thermal intercalation processes
  • Method for preparing germanium selenide two-dimensional materials on basis of solvent thermal intercalation processes
  • Method for preparing germanium selenide two-dimensional materials on basis of solvent thermal intercalation processes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 79 mg of selenium and 72.6 mg of germanium powder and place them in a quartz glass tube for vacuum packaging, slowly heat to 600 ° C, keep warm for 12 hours, and naturally cool to room temperature to obtain a germanium selenide body material;

[0025] (2) Put the germanium selenide body material obtained in step (1) into a reaction kettle, add ethanol, put it into a muffle furnace, heat up to 150° C., and keep it warm for 24 hours;

[0026] (3) putting the germanium selenide dispersion after solvothermal in step (2) into a cell pulverizer, and performing ultrasonic treatment, the ultrasonic power is 50W, and the ultrasonic time is 20h;

[0027] (4) Centrifuge the germanium selenide dispersion after the ultrasonic wave, the centrifugal speed is 8000r / min, and the centrifugation time is 5min to obtain a gray-black supernatant;

[0028] The gray solid obtained in step (1) is characterized by X-ray diffraction and scanning electron microscopy, and figure 1 Compar...

Embodiment 2

[0030] (1) Weigh 79 mg of selenium and 72.6 mg of germanium powder and place them in a quartz glass tube for vacuum packaging, slowly heat to 900 ° C, keep warm for 48 hours, and naturally cool to room temperature to obtain a germanium selenide body material;

[0031] (2) Put the germanium selenide body material obtained in step (1) into a reaction kettle, add methanol, put it into a muffle furnace, heat up to 100° C., and keep it warm for 48 hours;

[0032] (3) Put the germanium selenide dispersion liquid after solvothermal in step (2) into the cell pulverizer, carry out ultrasonic treatment, the power of ultrasonic is 150W, and ultrasonic time is 10h;

[0033] (4) Centrifuge the germanium selenide dispersion after the ultrasonic wave, the centrifugal speed is 5000r / min, and the centrifugation time is 20min to obtain a gray-black supernatant;

[0034] (5) X-ray diffraction and scanning electron microscope characterization are carried out to the gray solid obtained in step (1)...

Embodiment 3

[0036] (1) Weigh 79 mg of selenium and 72.6 mg of germanium powder and place them in a quartz glass tube for vacuum packaging, slowly heat to 750 ° C, keep warm for 72 hours, and naturally cool to room temperature to obtain a germanium selenide body material;

[0037] (2) Put the germanium selenide body material obtained in step (1) into a reaction kettle, add dimethylformamide, put it into a muffle furnace, heat up to 200° C., keep it warm for 8 hours, and perform scanning electron microscope characterization;

[0038] (3) Put the germanium selenide dispersion after solvothermal in step (2) into a cell pulverizer, carry out ultrasonic treatment, the ultrasonic power is 300W, and the ultrasonic time is 2h;

[0039] (4) Centrifuge the germanium selenide dispersion after the ultrasonic wave, the centrifugal speed is 1000r / min, and the centrifugation time is 60min to obtain a gray-black supernatant;

[0040] (5) X-ray diffraction and scanning electron microscope characterization ...

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Abstract

The invention discloses preparation of germanium selenide two-dimensional materials on the basis of solvent thermal intercalation processes. The preparation includes steps of (1), placing germanium selenide powder in reaction kettles, adding solvents into the reaction kettles, increasing the temperatures until the temperatures reach 100-200 DEG C and preserving heat for 8-48 h; (2), placing germanium selenide dispersion liquid, which is obtained after the solvents are heated at the step (1), in cell disruption machines and carrying out ultrasonic treatment; (3), carrying out centrifugal treatment on the germanium selenide dispersion liquid after the ultrasonic treatment is carried out on the germanium selenide dispersion liquid so as to obtain black gray supernatant liquid. Single-layer orfew-layer germanium selenide is dispersed in the black gray supernatant liquid. The preparation has the advantage that a method for preparing the germanium selenide two-dimensional materials is simple and feasible and is easy to operate.

Description

technical field [0001] The invention relates to the technical field of two-dimensional material preparation, in particular to a method for preparing a two-dimensional germanium selenide material based on a solvent thermal intercalation method. Background technique [0002] Two-dimensional layered semiconductor materials have excellent properties such as adjustable band gap and ultra-high specific surface area, as well as unique optical and electrical properties, which have aroused extensive research boom in the scientific community. Since graphene was successfully exfoliated in 2004, more and more two-dimensional semiconductor materials, such as transition metal dichalcogenides (MoS 2 、MoSe 2 、WS 2 ) and III–IVA semiconductor materials (GaS, GaSe, In 2 Se 3 , InSe), showing great potential application prospects in the fields of photodetectors, field effect transistors, solar cells and flexible devices. It is reported in the literature that germanium selenide is a layere...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y40/00H01L29/24
CPCC01B19/007C01P2002/72C01P2004/03C01P2004/04C01P2004/22H01L29/24
Inventor 李瑀张盼盼封伟冯奕钰
Owner TIANJIN UNIV
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