A kind of preparation method of sodium thioantimonite nanometer material

Abstract

The invention discloses a NaSbS2 nano material preparation method and belongs to the technical field of nano material preparation. Na3SbS4.9H2O prepared by a water bath method is utilized as a precursor material; water is utilized as a solvent, so that safety hazards caused by heat evaporation of an organic solvent and effects on the sample purity are avoided, and feasibility is strong; a reactionprocess is performed in a container with an opening, an expensive high-pressure reaction kettle has no need to be used, and limit of the reaction container volume is avoided; the technological conditions have the advantages of moderate conditions, environmental friendliness, simpleness and low cost; a NaSbS2 nanoparticle material can be prepared under a low temperature through heat treatment in the argon atmosphere; the NaSbS2 nanoparticle material has the advantages of good crystallinity, high purity, even dispersion and even morphology. According to the NaSbS2 nano material preparation method disclosed by the invention, the reaction raw materials are easy to obtain, the cost is low, processing equipment is simple, and energy consumption is low; furthermore, the precursor is prepared under the normal pressure, so that safety is good, and feasibility is strong; thus, the NaSbS2 nano material preparation method has the advantages of economic property, practicability and very good industrialization prospect.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and relates to a NaSbS 2 A method for preparing nanomaterials, in particular to a method for preparing NaSbS by heat treatment auxiliary solution method 2 methods for nanomaterials. Background technique [0002] Sodium Thioantimonite (NaSbS 2 ) is a computationally screened potential p-type semiconductor thermoelectric material that has been shown to be a very efficient solar absorber, NaSbS 2 The energy band Eg=1.5~1.8eV is slightly larger than the best energy band of solar absorbing materials (Eg=1.4eV), and has a large light absorption coefficient in the visible light range (α=10 4 ~10 5 cm -1 ), using NaSbS 2 The nanoparticles achieved an efficiency of 3.18 percent in the dye-sensitized solar cell, which is comparable to earlier solar cells of a similar type made using organometallic halide perovskites. Simultaneously NaSbS 2 The three elements used in the material are...

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Problems solved by technology

[0004] The currently reported methods for preparing nanomaterials mainly include uniform precipitation method [1], sol-gel method [2] and hydrothermal method [3]. Among them, the crystallinity of the product obtained by the uniform precipitation method is relatively weak and the size of the product is The distribution is uneven; the sol-gel method has a long reaction period, and the post-treatment of the obtained product is relatively cumbersome; the hydrothermal method is easy to obtain products with strong crystallinity, special morphology, controllable grain growth, uniform size distribution, and good dispersion. Make the reaction more complete, but need an expensive high-pressure reactor, which is easily limited by the volume of the reaction vessel, which is not conducive to large-scale promotion

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