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Preparation method of rhenium disulfide or rhenium diselenide crystals

A technology of rhenium diselenide and rhenium disulfide, which is applied in chemical instruments and methods, crystal growth, and chemically reactive gases, etc., can solve the problems of complex operation steps and high requirements for experimental devices, and achieve high repeatability and richness. The effect of dimensional material system

Pending Publication Date: 2021-04-02
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The operation steps of the above method are relatively complicated, and the requirements for experimental equipment are relatively high.

Method used

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  • Preparation method of rhenium disulfide or rhenium diselenide crystals
  • Preparation method of rhenium disulfide or rhenium diselenide crystals
  • Preparation method of rhenium disulfide or rhenium diselenide crystals

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Experimental program
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Embodiment 1

[0028]1 Show: Powder (99.999%, 22 mesh, Alfa Aesar), with sulfur powder (99.99%, Shanghai) or selenium powder (99.99%, Tongshuang) strictly in accordance with the chemical measurement ratio 1: 2, and 2mg As the transfer agent, the total mass of the drug is 600 mg, the inner diameter of 10 mm, the length of 20 cm, and the ultrasonic treatment is 30 min to allow the drug to be sufficiently mixed. In order to avoid the volatilization of singleiiod, the ultrasonic treatment needs to be sealed in the like.

[0029]2 package: Pumping quartz ampoule vacuum to about 10-4Torr, with a propane flame sealing port.

[0030]3 Reactant Preheat: Place the quartz ampoule horizontally into the double temperature zone tube furnace, the temperature of the source region and the growth zone, from 8 h, from room temperature to 900 ° C and 1000 ° C, and maintain a temperature of 24 h.

[0031]4 Formal reaction: Reline the source region at a temperature of + 20 ° C to 1060 ° C from 900 ° C, while maintaining the gro...

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Abstract

The invention discloses a preparation method of rhenium disulfide or rhenium diselenide crystals. The method comprises the following steps of: ultrasonically and uniformly mixing rhenium powder, sulfur powder or selenium powder and an iodine transport agent, sealing a port with propane or oxyhydrogen flame, preheating in a double-temperature-zone tube furnace, carrying out formal reaction after the temperature of a source zone rises, slowly cooling after growth is completed, and naturally cooling to obtain rhenium disulfide or rhenium diselenide crystals. According to the method, a chemical vapor transport method is utilized, a closed system is adopted, reaction conditions are controllable, synthesis is stable, repeatability is high, and high-quality layered material blocky crystals can beprovided for mechanical stripping.

Description

Technical field[0001]The present invention belongs to the preparation of a two-dimensional transition metal sulfide compound, and is related to the preparation method of sulfide oxide or di selenized ruthenium crystals.Background technique[0002]In recent years, the research and preparation of various two-dimensional materials, the research and development of various types of two-dimensional materials, and its device research are booming. Taking two-dimensional transition metal sulfur compound as an example, component and structural diversity, which enables it to have a rich physical chemical properties, and electrical properties enclose insulators, semiconductors to metals, have broad in the fields of sensors, electrochemical catalysis, photoelectric devices. Application prospects.[0003]The high quality preparation of two - dimensional materials is a premise and basis for productive research and device constructing. At present, the two-dimensional material preparation method mainly ...

Claims

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Application Information

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IPC IPC(8): C30B29/46C30B25/00
CPCC30B29/46C30B25/00
Inventor 赵益彬万逸阚二军刘明岩曾华凌
Owner NANJING UNIV OF SCI & TECH
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