Method for synthesizing copper-zinc-tin-sulfur nano-sheet array by two-step method

Abstract

The invention discloses a method for synthesizing a copper-zinc-tin-sulfur nano-sheet array by a two-step method. The method comprises the following steps that: FTO glass is used as a substrate, and two porcelain boats are respectively filled with powdered sulfur and cuprous chloride, and are put into a vacuum tube furnace; the vacuum tube furnace is vacuumized to a high-vacuum state at negative 101kPa, is washed for three times with argon, and is set to be 300 DEG C; the substrate is taken out after the reaction is finished, is put into the liner of a reaction kettle, is added with a reaction liquid (zinc acetate dihydrate and stannic chloride dihydrate are dissolved in triethylene glycol, the mass ratio of the solutes is 1 to 1, and the concentration of each solute is 1.75g / L), and is put in the steel bushing of the reaction kettle; the reaction kettle is put in a constant temperature oven, and is insulated for 40 hours at 205 DEG C; and the substrate is washed with ethanol after reaction to obtain the copper-zinc-tin-sulfur nano-sheet array. According to the method, the original process for preparing a cuprous chloride film and a subsequent sulfurizing process are integrated into one step, the problem that a product easily falls off can be solved, the repeatability can be improved, and the process cycle is shortend; and the size of a single sheet in the sheet array can be 20[mu]m, the sheet size can be controlled, and the synthesizing method is successfully improved.

Description

technical field [0001] The present invention relates to nanomaterials, in particular to a method for preparing a copper sulfide nanosheet array by a gas-phase one-step method and converting it into a copper-zinc-tin-sulfur nanosheet array in situ by subsequent solvent heat. Background technique [0002] copper zinc tin sulfur copper 2 ZnSnS 4 It is a quaternary metal sulfide material. Compared with traditional binary semiconductor materials, it has an adjustable band gap and excellent light absorption performance. It has a wide range of applications in the field of photocatalysis such as photolysis of water to produce hydrogen, and the field of thin-film solar cell absorption layers. For application prospects, see M.P.Suryawanshi, G.L.Agawane, S.M.Bhosale, et al. Its constituent elements are abundant in the earth's crust and the elements themselves are green and non-toxic, which undoubtedly enhances their strategic position in new materials. [0003] Due to the many types...

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Problems solved by technology

[0005] The purpose of the present invention is to further improve the technical scheme on the basis of the prior art, aiming at the problem that it is difficult to control the deposition thickness when using the thermal evaporation method to deposit cuprous chloride in the process of preparing the copper sulfide template and the need to increase the subsequent sulfidation Steps complicate the process, and a more stable and simpler synthesis method is provided by one-step vapor phase sulfide deposition of copper sulfide nanosheet arrays

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