Method for preparing polycrystalline SnSe2 material by solution method

Abstract

The invention discloses a method for preparing a polycrystalline SnSe2 material by a solution method. The method comprises the steps that selenium powder is dispersed in an oleic acid solution to obtain a precursor solution A of a selenium source; then water vapor of the precursor solution A is removed under vacuuming conditions to obtain an environment without oxygen or water vapor; then the temperature rises, heating and heat preservation are conducted, and the precursor solution A is sucked to be added into a mixed solution B composed of a stannum source and ethanol to obtain a mixed solution C, wherein the volume ratio of the precursor solution A to the mixed solution B is (5-7):(25-30); then the mixed solution C is subjected to an alcohol thermal reaction, and drying is conducted to obtain SnSe2 powder. The preparation method is simple, the repeatability is high, the addition of any catalyst is not needed, expensive and complicated equipment is not involved, waste liquid generatedby the reaction is easy to handle, and the method is friendly to the environment and an operator.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional layered materials, in particular to a solution method for preparing polycrystalline SnSe 2 material method. Background technique [0002] Since the discovery of graphene by two physicists at the University of Manchester in 2004, the research on two-dimensional layered materials has also been greatly promoted. When the thickness of 2D layered materials is reduced to the nanometer scale, or even atomic layer thickness, 2D layered materials can have very different properties. So far, the members of the two-dimensional layered material family have increased to forty-two, most of which are transition metal sulfides or selenides, the so-called TMD (TrAnsitionMetAlDichAlcogenides) compounds. where SnSe 2 As an important two-dimensional material of group IV-VI, Sn and Se are abundant in the crust, and SnSe 2 It has less impact on organisms and the environment, and is environmentally friendly, ...

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Problems solved by technology

[0003] Current literature reports that SnSe 2 The synthesis of materials is mainly hydrothermal method, solvothermal method, hot injection method, etc. Some of these methods are complex in process, some use toxic and harmful organic substances, precursors or strong reducing agents in the preparation process, and some are in the synthesis process. Involves the use of complex, expensive instrumentation, which makes the synthesis of SnSe 2 The cost is too high, the synthesis process is easy to cause secondary pollution to the environment and human body, etc.

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