Method for preparing SnSe through solution method

Abstract

The invention discloses a method for preparing SnSe through a solution method. The method comprises the steps that selenium powder is dispersed into a high-boiling-point solvent to obtain a precursorsolution A of a selenium source; then, under the vacuum pumping condition, water vapor in the precursor solution A is removed, and the environment without oxygen and the water vapor is obtained; then,temperature increasing and heating treatment are conducted, the precursor solution A is extracted according to the proportion to be added into a mixed solution B composed of a tin source and ethyl alcohol, thus a mixed solution C is obtained, and then the mixed solution C is subjected to an alcohothermal reaction and then cooled to the room temperature; and through centrifugal separation, cleaning and drying, a black brown target product is obtained. According to the preparation method, the high temperature and high pressure are not needed, no highly toxic and hazardous substance is containedin reaction, inorganic tin salt serves as the tin source, the precursor solution is subjected to the alcohothermal reaction for several hours in a reaction kettle, thus the target product can be obtained, and the product is a purely-flaky nanosheet.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional layered materials, and in particular relates to a method for preparing SnSe by a solution method. Background technique [0002] After graphene became a star material in the field of materials research, two-dimensional layered materials have received extensive attention. When the thickness of two-dimensional layered materials is reduced to the nanometer scale, or even atomic layer thickness, the two-dimensional layered materials show their strange physical, chemical, optical, electrical and other properties. First-class universities and research institutions at home and abroad have shown great interest in two-dimensional layered materials, and research has been carried out in full swing from the preparation methods of materials to their various functional applications. Among these materials, SnSe is an important P-type semiconductor material. Its constituent elements Sn and Se are abundant...

AI Technical Summary

Problems solved by technology

[0003] In order to prepare two-dimensional layered SnSe nanosheets, among several methods disclosed at present, including chemical vapor phase transport method, liquid phase method, and solid phase reaction method, these methods Some are expensive, some are cumbersome to prepare, and some involve the use of highly toxic reagents such as hydrazine hydrate in the synthesis process, resulting in adverse effects on the environment and operators during the preparation process

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