Room temperature water solution growth type stannous selenium nanorod cone monocrystal and method thereof

Abstract

The invention relates to a room temperature water solution growth type stannous selenium nanorod cone monocrystal and a method thereof. The method comprises the following steps of using stannous chloride as a stannous source, using selenium powder as a selenium source, and dissolving the stannous chloride and a chelating agent into water, so as to obtain a solution A; dissolving the selenium powder into a potassium hydroxide water solution, so as to obtain a solution B; mixing the solution A and the solution B to react, so as to obtain the stannous selenium nanorod cone monocrystal. The method has the advantages that by adopting a water solution method, the growth of the stannous selenium nanometer crystal is completed through three phases of nucleating, aging and crystal nuclear growth of the nanometer crystal, finally the stannous selenium nanorod cone monocrystal is obtained through separating, the reaction temperature is room temperature, the operation is simple, the reaction time is short, and the control is easy; the grown stannous selenium is in a nanorod cone shape and is nanometer monocrystal, the nanometer tip end is sharp, and the purity of the obtained stannous selenium nanorod cone monocrystal is high.

Description

technical field [0001] The invention belongs to the field of synthesis of nanocrystalline materials, in particular to a room-temperature aqueous solution method for growing tin selenide nanorod-cone single crystals and a method thereof. Background technique [0002] Tin selenide (SnSe) belongs to a layered compound of the main group IV-VI. It has a bandgap between 0.9 and 1.3 eV and a high absorption coefficient (~10 5 cm -1 ), these excellent optical properties make SnSe have broad application prospects in the field of photovoltaic solar energy, infrared optoelectronic devices, detectors and other fields. In addition, it has ultra-low thermal conductivity and high thermoelectric performance, and is a thermoelectric material with great potential (Zhao LiDong, Lo ShihHan, Zhang YongSheng et al., Ultralow thermal conductivity and high thermoelectric figure of meritin SnSe crystals[J], Nature , 2014, 508:373-377). The abundances of tin and selenium in the earth's crust are ...

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Problems solved by technology

[0003] The design and synthesis of SnSe nanostructures have aroused widespread interest among researchers. So far, many SnSe nanomaterials have been prepared, including nanosheets, nanorods, nanobelts, etc. Although these shapes However, there are some technical disadvantages, such as poor crystallinity of the obtained nanosheets, not complete nano single crystals, but polycrystalline materials, or long reaction time

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