Method for preparing noble metal nano-crystal load copper-zinc-tin-sulfur film

A precious metal nanocrystal, copper-zinc-tin-sulfur technology, which can be used in the manufacture of final products, sustainable manufacturing/processing, electrical components, etc., can solve the problems of loading precious metal nanocrystals, and achieve the effect of enhancing performance, simple method and energy saving.

Active Publication Date: 2015-10-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that it is impossible to load noble metal nanocrystals on bulk copper-zinc-tin-sulfur thin films in the prior art, the purpose of the present invention is to provide a method capable of effectively loading noble metal nanocrystals on copper-zinc-tin-sulfur thin films to prepare a A method for supporting copper-zinc-tin-sulfur thin films with noble metal nanocrystals with high catalytic activity. Through this method, the loading amount of noble metal nanocrystals can be adjusted arbitrarily, and catalytic materials suitable for various fields can be prepared.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of Unsupported Noble Metal Nanocrystalline CuZnSnS Thin Films

[0045] 1. Add 16mmol tin chloride, 30mmol copper chloride, 20mmol zinc chloride and 130mmol thiourea to 60mL ethylene glycol methyl ether, stir at 40°C for half an hour to complete the preparation of the copper zinc tin sulfur precursor

[0046] 2. Drop the prepared copper-zinc-tin-sulfur precursor solution on the surface of the substrate, spin-coat at a low speed of 200rpm for 10s, and then spin-coat at a high speed of 2000rpm for 10s to complete the spin-coating of the copper-zinc-tin-sulfur thin film.

[0047] 3. Place the prefabricated layer film prepared in 2 in a tube furnace for sulfuration annealing at 500 degrees Celsius to complete the preparation of the unsupported noble metal nanocrystalline copper-zinc-tin-sulfur film.

[0048]The prepared copper-zinc-tin-sulfur thin film is applied to the catalytic degradation of rhodamine B aqueous solution (concentration 10mg / l of rhodamine B aqu...

Embodiment 2

[0050] Preparation of 0.5% Pt Nanocrystalline Supported CuZnSnS Thin Films

[0051] 1. Add 0.18 mmol of chloroplatinic acid to 50 mL of deionized water to prepare an aqueous solution of chloroplatinic acid, add 6 mmol of sodium borohydride to 50 mL of deionized water to prepare an aqueous solution of sodium borohydride, and prepare 1 mL of sodium borohydride The aqueous solution was added dropwise to a 5 mL aqueous solution of chloroplatinic acid to react at room temperature for 10 minutes, and the precipitated product was centrifugally dispersed in toluene to complete the preparation of a 3 mM platinum nanocrystal solution.

[0052] 2. Add 16mmol of tin sulfate, 30mmol of copper sulfate, 20mmol of zinc sulfate and 130mmol of sodium sulfide into 40mL of N,N-dimethylformamide, and stir at 60°C for 2 hours to complete the preparation of the copper-zinc-tin-sulfur precursor solution.

[0053] 3. Add 5 mL of the 3 mM platinum nanocrystal solution prepared in 1 to 8 mL of the 375 m...

Embodiment 3

[0058] Preparation of 20% Au Nanocrystalline Supported CuZnSnS Thin Films

[0059] 1. Add 18mmol of gold chloride to 50mL of ethylene glycol to prepare a solution of platinum chloride, add 100mmol of trioctylphosphine to 50mL of ethylene glycol to prepare a solution of trioctylphosphine, and prepare 15mL of trioctylphosphine The solution was added dropwise into 50 mL of gold chloride solution to react at room temperature for 10 minutes, and the precipitated product was centrifugally dispersed in isopropanol to complete the preparation of a 300 mM gold nanocrystal solution.

[0060] 2. Add 16mmol of tin nitrate, 30mmol of copper nitrate, 20mmol of zinc nitrate and 130mmol of pentanethiol into 20mL of methanol, and stir at 60°C for 2 hours to complete the preparation of the copper-zinc-tin-sulfur precursor solution.

[0061] 3. Add 10mL of the 300mM platinum nanocrystal solution prepared in 1 to 20mL of the 750mM copper-zinc-tin-sulfur precursor solution prepared in 2, and add 5...

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Abstract

The invention discloses a method for preparing a noble metal nano-crystal load copper-zinc-tin-sulfur film. The method comprises the steps of preparing a noble metal nano-crystal particle dispersion liquid, preparing a dispersion liquid containing copper, zinc, tin, and sulfur sources, mixing the two dispersion liquids in the presence of stabilizer into a precursor solution with good dispersity and stability, and preparing a noble metal nano-crystal load copper-zinc-tin-sulfur film through spin-coating and sintering processes. According to the preparation method, the operation is simple, the reaction conditions are mild, and the requirement on raw materials is low. A noble metal nano-crystal load copper-zinc-tin-sulfur film prepared by the method has an excellent catalytic effect, the load capacity of noble metal nano-crystal can be regulated arbitrarily, and the film can be widely used in different fields.

Description

technical field [0001] The invention relates to a method for preparing a copper-zinc-tin-sulfur thin film supported by noble metal nanocrystals, and belongs to the field of material preparation. Background technique [0002] Noble metal nanocrystals are polymers composed of a limited number of noble metal atoms, which have special properties that noble metal bulks do not have. For example: surface effect, quantum size effect, small size effect, macroscopic quantum tunneling effect, Coulomb blocking and quantum tunneling effect, and dielectric confinement effect, etc. It is precisely because of the above special properties that noble metal nanocrystals show excellent performance in the fields of catalysis, energy and biomedicine. In recent years, CuZnSnS, as a cheap and high-performance emerging semiconductor material, has also been widely studied in the fields of catalysis and energy. Combining noble metal nanomaterials with copper, zinc, tin and sulfur can obtain an advan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCH01L31/0324Y02P70/50
Inventor 刘芳洋童正夫陈珠蒋良兴赖延清李劼刘业翔
Owner CENT SOUTH UNIV
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