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Preparation method of Au@Cu2-xSe cage-like core-shell nanostructures

A technology of aucu2-xse and nanostructure, applied in the field of preparation of core-shell nanocomposite technology

Inactive Publication Date: 2016-06-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis of nanomaterials with metal / semiconductor heterostructures is still very challenging

Method used

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  • Preparation method of Au@Cu2-xSe cage-like core-shell nanostructures
  • Preparation method of Au@Cu2-xSe cage-like core-shell nanostructures
  • Preparation method of Au@Cu2-xSe cage-like core-shell nanostructures

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] AuCu 2-x Concrete steps for the synthesis of Se cage-like core-shell nanostructures:

[0018] (1) Heat 100ml of chloroauric acid aqueous solution (0.01wt%) to boiling, then add 0.7ml of sodium citrate aqueous solution (1wt%), react under magnetic stirring for 25min, then perform centrifugation, and then disperse into 5ml of water to prepare Gold colloidal solution;

[0019] (2) To 20ml 0.01M concentration of CuSO 4 Add 0.2g of PVP (polyvinylpyrrolidone) to the solution, stir it magnetically to dissolve it, then add 2ml of gold colloidal solution, and finally add 5ml of 0.1M NaOH solution and 5ml of 0.1M AA (ascorbic acid) successively, and react for 0.5h , followed by centrifugation, and then dispersed into 5ml of water to obtain AuCu- 2 O core-shell nanocolloids;

[0020] (3) Add 0.5-1.5mmol selenium powder to 10ml 3-4M NaOH solution, ultrasonically disperse for 5-10min, then add 0.5-1.5mmol KBH 4 , stirring at 3000-6000rpm for 1-1.5h as a selenium source;

[002...

Embodiment 2

[0023] AuCu 2-x Concrete steps for the synthesis of Se cage-like core-shell nanostructures:

[0024] (1) Heat 100ml of chloroauric acid aqueous solution (0.01wt%) to boiling, then add 0.7ml of sodium citrate aqueous solution (1wt%), react under magnetic stirring for 25min, then perform centrifugation, and then disperse into 5ml of water to prepare Gold colloidal solution;

[0025] (2) To 20ml 0.01M concentration of CuSO 4 Add 0.2g of PVP (polyvinylpyrrolidone) to the solution, stir it magnetically to dissolve it, then add 4ml of gold colloidal solution, and finally add 5ml of 0.1M NaOH solution and 5ml of 0.1M AA (ascorbic acid) successively, and react for 0.5h , followed by centrifugation, and then dispersed into 5ml of water to obtain AuCu- 2 O core-shell nanocolloids;

[0026] (3) Add 0.5-1.5mmol selenium powder to 10ml 3-4M NaOH solution, ultrasonically disperse for 5-10min, then add 0.5-1.5mmol KBH 4 , stirring at 3000-6000rpm for 1-1.5h as a selenium source;

[0027]...

Embodiment 3

[0029] AuCu 2-x Concrete steps for the synthesis of Se cage-like core-shell nanostructures:

[0030] (1) Heat 100ml of chloroauric acid aqueous solution (0.01wt%) to boiling, then add 0.7ml of sodium citrate aqueous solution (1wt%), react for 25min under magnetic stirring, then perform centrifugation, and then disperse into 5ml of water to prepare Gold colloidal solution;

[0031] (2) To 20ml 0.01M concentration of CuSO 4 Add 0.2g of PVP (polyvinylpyrrolidone) to the solution, stir it magnetically to dissolve it, then add 2ml of gold colloidal solution, and finally add 5ml of 0.1M NaOH solution and 5ml of 0.1M AA (ascorbic acid) successively, and react for 0.5h , followed by centrifugation, and then dispersed into 5ml of water to obtain AuCu- 2 O core-shell nanocolloids;

[0032] (3) Add 0.5-1.5mmol selenium powder to 10ml 3-4M NaOH solution, ultrasonically disperse for 5-10min, then add 0.5-1.5mmol KBH 4 , stirring at 3000-6000rpm for 1-1.5h as a selenium source;

[003...

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Abstract

The invention discloses a preparation method of Au@Cu2-xSe cage-like core-shell nanostructures. The preparation method comprises: 1, using sodium citrate to reduce chloroauric acid to obtain spherical gold nanoparticles; 2, by using the spherical gold nanoparticles as a template, using ascorbic acid to reduce a copper salt to obtain gold / cuprous oxide nano core-shell structures; 3, using potassium borohydride to reduce selenium powder in a strong base environment to obtain a selenium source, and mixing and reacting the obtained selenium source with the gold / cuprous oxide core-shell nanoparticles; and 4, carrying out centrifugal washing treatment, and vacuum drying treatment, and finally obtaining the gold / cuprous oxide cage-like core-shell nanostructures. The method is easy in operation, good in repeatability, and high in yield, and the prepared product is good in stability.

Description

technical field [0001] The invention relates to a preparation method in the technical field of core-shell nanocomposite materials, in particular to a preparation method for a gold / copper selenide cage-like core-shell nanostructure. Background technique [0002] Metal / semiconductor heterojunction nanomaterials have received special attention and attention due to their importance in basic scientific research and their huge potential application prospects in science and technology. Metal / semiconductor heterojunction nanocrystals can not only maintain the unique properties of metal and semiconductor nanomaterials, but also generate new properties due to the mutual coupling between metal and semiconductor. Because the existence of metal / semiconductor heterostructures can effectively control the transport of electrons, holes, and various excitons, resulting in novel electrical, optical, interfacial, pyroelectric, and fluorescent properties. For example, the Schottky barrier at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C01B19/04B82Y40/00
CPCB22F9/24B82Y40/00C01B19/007C01P2002/72C01P2004/03C01P2004/61C01P2004/80
Inventor 陈新尹凯凯曹红亮李唱汪翔
Owner EAST CHINA UNIV OF SCI & TECH
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