A kind of porous gold nanosphere and its preparation method and intermediate product lead sulfide gold hybrid nanostructure

A technology of gold nanospheres and nanostructures, applied in nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problem of high dependence, low surface area to volume ratio of nano-gold in two-dimensional sheet structure, and inability to realize large-scale industrial production, etc. problem, to achieve the effect of improving the utilization rate and making the synthesis method simple

CN107335812BActive Publication Date: 2019-06-11SHAANXI NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-06-11

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Abstract

The invention discloses a porous gold nanosphere, a preparation method thereof and an intermediate product lead sulfide gold hybrid nanostructure. The above preparation method comprises: reacting a sulfur-containing small molecule solution and a lead acetate solution to obtain a lead sulfide nanoparticle template solution; reacting a tetrachloroauric acid solution, an ascorbic acid solution and a lead sulfide nanoparticle template solution to obtain a lead sulfide-gold hybrid nanostructure solution; The lead sulfide template is removed to obtain a porous gold nanosphere solution, and the supernatant is removed by centrifugation to obtain the porous gold nanosphere. The invention realizes the pure chemical synthesis of the porous gold nanosphere, the synthesis method is simple, the utilization rate of gold is improved, and it can be prepared in large quantities. The synthesized three-dimensional structured gold nanospheres possess very dense porous surfaces consisting of high-density, low-pairing atomic steps and kinks, which provide highly active catalytic sites for catalytic reactions.
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Description

Technical field

[0001] The invention belongs to the technical field of the preparation of gold nanoparticles, and relates to a method for preparing porous gold nanospheres based on a template method, in particular to a porous gold nanosphere, a preparation method thereof, and an intermediate product lead sulfide gold hybrid nanostructure. Background technique

[0002] Gold nanoparticles have good chemical stability and excellent physical and chemical properties. Due to the high free electron density and high conductivity of gold, gold nanoparticles exhibit excellent surface plasmon resonance properties. When resonance occurs, gold nanoparticles have a very high electric field strength enhancement effect, a great optical absorption and scattering cross-section. These properties have shown great applications in the fields of optical control, biotechnology, optoelectronic technology, solar technology, and microelectronics technology. prospect.

[0003] So far, gold nanoparticles wit...

Examples

Embodiment 1

[0030] First prepare the following solutions:

[0031] 1. 0.5M thioacetamide aqueous solution: Weigh 3.7565g thioacetamide (analytical purity) and dissolve it in 100mL deionized water to fully dissolve it to form a colorless transparent solution;

[0032] 2. The concentration of 0.1M cetyltrimethylammonium bromide aqueous solution: Weigh 14.6g cetyltrimethylammonium bromide (analytical purity) and dissolve it in 400mL deionized water, heat and stir to fully dissolve it to form Colorless transparent solution;

[0033] 3. A 0.5M lead acetate aqueous solution: Weigh 8.1323g of lead acetate (analytical purity) and dissolve it in 50mL of deionized water to fully dissolve it to form a colorless and transparent solution;

[0034] 4. Aqueous solution of cetyltrimethylammonium chloride with a concentration of 0.08M: Weigh 10.24g cetyltrimethylammonium chloride (analytical purity) and dissolve it in 400mL deionized water, heat and stir to make it fully dissolved Colorless transparent solution;...

Embodiment 2-4

[0045] Example 2-4: The effect of the amount of lead sulfide nanoparticle solution added in step 2 on the growth of porous gold nanospheres.

Embodiment 2

[0047] In this example, except that the volume of the lead sulfide nanoparticle solution added in step 2 was 0.03 mL, the other steps were the same as in Example 1. The size of the porous gold nanospheres obtained was 167±16 nm, and the surface plasmon The element resonance spectrum is 750 nm ( Figure 4 , Line 1).