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Preparation method of nitric acid induced gold nanobelt

A technology of gold nanometer and nitric acid, which is applied in metal processing equipment, transportation and packaging, etc., to achieve the effect of simple method, smooth and complete surface, and good crystallinity

Inactive Publication Date: 2016-05-11
SHAANXI SHENGMAI PETROLEUM
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

With the spherical grains with the lowest surface energy as the main form, the preparation of anisotropic gold nanoribbons is still challenging.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0017] A preparation method for nitric acid-induced gold nanobelts, using the following steps:

[0018] Add 3mL of trisodium citrate solution into a three-necked flask filled with 100mL of aqueous solution, and heat to boiling; inject the chloroauric acid solution under stirring; adjust the heat source to keep the reaction system slightly boiling, stir, and the solution changes from light yellow to colorless, Gray, and finally turned into wine red, remove the heat source, stop stirring, cool to room temperature, and store at 4°C in the dark;

[0019] Dissolve 1.71g CTAB in 20mL triple-distilled deionized water, heat in a water bath; take 830μL HAuCl 4 The solution was injected into the flask, and the solution was orange-red; then nitric acid solution and 200 μL ascorbic acid solution were injected; 200 μL gold sol was injected within 1 min, the color of the solution first changed from orange-red to colorless, and then gradually appeared pink, red, until deep red and Reddish b...

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Abstract

The invention relates to the technical field of preparation of rare metal materials, in particular to a preparation method of a nitric acid induced gold nanobelt by a seeding method. The preparation method of the nitric acid induced gold nanobelt comprises the steps of adding a trisodium citrate solution to a 3-neck flask and heating; injecting a chloroauric acid solution while stirring; finally turning the solution into wine red, removing a heat source, stopping stirring, cooling and keeping in dark place at 4 DEG C; dissolving CTAB (Cetyl Trimethyl Ammonium Bromide) and heating in water bath; injecting 830 uL of HAuCl4 solution, a nitric acid solution and an ascorbic acid solution; injecting a gold sol until the solution turns into dark red and red brown, cooling to room temperature, centrifugal separating, discarding a supernatant liquid and clarifying the solution to obtain the nitric acid induced gold nanobelt. A single-crystal gold nanobelt prepared by using the seeding method has a width between 50 nm and 200 nm and a length between 0.7 pm and 3 pm; the nanobelt is smooth and complete in surface, good in crystallinity and grows along the 111 crystal orientation; the method provided by the invention is simple and easy to operate, high in operability and liable to popularization and utilization in large area.

Description

technical field [0001] The invention relates to the technical field of preparation of rare metal materials, in particular to a preparation method of nitric acid-induced gold nanobelts by a seed crystal method. Background technique [0002] Nanobelt is a newly reported one-dimensional nanostructure after nanowire and nanotube. Since ZnO nanoribbons were first prepared, nanoribbons have attracted extensive attention due to their novel structures different from tube and wire materials and unique optoelectronic properties. The two ends of the gold nanoribbon have a strong enhanced electric field, and show different plasmonic bands in the direction of the long axis and the direction of the short axis, and are very sensitive to the dielectric constant of the surrounding medium. This electronic property makes it very promising as a It is a kind of nanomaterial which has been widely used in the fields of nanophotonics and sensing. [0003] At present, the research work of nanobelt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/24
CPCB22F9/24B22F1/068B22F1/07
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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