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Gold nanorod/ titanium dioxide core-shell nanostructure and one-step synthetic method thereof

A technology of gold nanorods and titanium dioxide, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems that are not conducive to the widespread promotion of technology, reduce the probability of success, and the loss of gold nanorods, and achieve The structure and shape of the product are easy to control, the method is simple and easy to operate, and the effect of high repetition rate

Active Publication Date: 2016-11-23
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are inevitable obvious defects in this synthesis technology, for example: first, in the process of two-step synthesis, more steps will inevitably bring about the loss of gold nanorods, resulting in an increase in cost; second, the two-step method The method of layer-by-layer assembly is adopted, more expensive chemical reagents are used, and the reaction time is longer, which increases labor costs and reduces the probability of success at the same time, which is not conducive to the widespread promotion of technology

Method used

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  • Gold nanorod/ titanium dioxide core-shell nanostructure and one-step synthetic method thereof
  • Gold nanorod/ titanium dioxide core-shell nanostructure and one-step synthetic method thereof
  • Gold nanorod/ titanium dioxide core-shell nanostructure and one-step synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Using the seed growth method to prepare gold nanorods (refer to J.AM.CHEM.SOC.2010,132,4806–4814) and other documents, but not limited to this, the morphology can be found in figure 1 ;

[0032] (2) Get 10 milliliters of cetyltrimethylammonium bromide-stabilized gold nanorods grown by the seed method in step (1) (the longitudinal plasmon absorption wavelength is 730nm), and centrifuge twice at 8000 rpm for 20 minutes. Then add 1 ml of deionized water to disperse;

[0033] (3) Take 75 microliters of concentrated gold nanorods, add 400 microliters of water to disperse, and then add 20 microliters of 0.01 mol / liter cetyltrimethylammonium bromide aqueous solution;

[0034] (4) Add 2 microliters of aqueous sodium hydroxide solution of 0.1 mol / liter;

[0035] (5) Add 300 microliters of an ethanol solution of bis(acetylacetonato)diisopropyl titanate with a concentration of 0.01 mol / liter, and the reaction system remains in a state of vibration or magnetic stirring during...

Embodiment 2

[0038] (1) Prepare gold nanorods by seed growth method (refer to J.AM.CHEM.SOC.2010, 132, 4806-4814 and other documents), and its morphology is similar to that of Example 1;

[0039] (2) Take 12 milliliters of cetyltrimethylammonium bromide-stabilized gold nanorods grown by seed method in step (1) (the longitudinal plasmon absorption wavelength is 698nm, please refer to figure 2 ), 8000 rpm, and centrifuged twice in 20 minutes. Then add 1 ml of deionized water to disperse.

[0040] (3) Take 75 microliters of concentrated gold nanorods, add 400 microliters of water to disperse, and then add 20 microliters of 0.01 mol / liter cetyltrimethylammonium bromide aqueous solution.

[0041] (4) Add 2 microliters of 0.1 mol / liter sodium hydroxide aqueous solution.

[0042] (5) Add 120 microliters of an ethanol solution of bis(acetylacetonyl)diisopropyl titanate with a concentration of 0.01 mol / liter. During the addition process, the reaction system was kept in a shaking or magnetic sti...

Embodiment 3

[0045] (1) Prepare gold nanorods by seed growth method (refer to J.AM.CHEM.SOC.2010, 132, 4806-4814 and other documents), and its morphology is similar to that of Example 1;

[0046] (2) Get 14 milliliters of cetyltrimethylammonium bromide-stabilized gold nanorods (longitudinal plasmon absorption wavelength is 675nm) grown by the seed method in step (1), centrifuge twice at 8000 rpm for 20 minutes. Then add 1.5 ml of deionized water to disperse.

[0047](3) Take 75 microliters of concentrated gold nanorods, add 800 microliters of water to disperse, and then add 20 microliters of 0.01 mol / liter cetyltrimethylammonium bromide aqueous solution.

[0048] (4) Add 2 microliters of 0.1 mol / liter sodium hydroxide aqueous solution.

[0049] (5) Add 150 microliters of an ethanol solution of bis(acetylacetonyl)diisopropyl titanate with a concentration of 0.01 mol / liter. During the addition process, the reaction system was kept in a shaking or magnetic stirring state.

[0050] (6) Reac...

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Abstract

The invention discloses a gold nanorod / titanium dioxide core-shell nanostructure and a one-step synthetic method of the gold nanorod / titanium dioxide core-shell nanostructure. The synthetic method comprises the steps of scattering gold nanorods in a water solution containing cetyl trimethyl ammonium bromide, adjusting the mixed solution to be alkaline, then, adding a titanium source with a low hydrolysis rate into the mixed solution to form a mixed reaction system and carrying out reaction to obtain the gold nanorod / titanium dioxide core-shell nanostructure. The gold nanorod / titanium dioxide core-shell nanostructure comprises the gold nanorods and the titanium dioxide shell layers coating the gold nanorods, and the titanium dioxide shell layers are each of a mesoporous structure. The one-step synthetic method of the gold nanorod / titanium dioxide core-shell nanostructure is simple and easy to operate, mild in reaction condition, high in reproducibility and yield, easy to control in product structure and morphology, low in cost, friendly to the environment, safe, nontoxic, very easy to popularize widely and produce industrially.

Description

technical field [0001] The invention relates to a method for preparing nanomaterials, in particular to a method for synthesizing gold nanorods / titanium dioxide core-shell nanostructures in one step. It has important application value. Background technique [0002] The photocatalytic technology of nanomaterials based on surface plasmon resonance enhancement of gold nanorods is a hotspot in the field of nanomaterials research. Nanostructured TiO2 has better photocatalytic properties than bulk materials. The photocatalytic performance of titania nanostructures can be further improved by utilizing the plasmon enhancement effect of gold nanorods. At present, the synthesis technology of gold nanorod / titanium dioxide core-shell nanostructure is a bottleneck problem restricting the development of this technology. Therefore, it is a challenging problem to discover and invent a simple and generalizable synthesis technique of gold nanorods / titanium dioxide core-shell nanostructures....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B82Y40/00B82Y30/00
Inventor 倪卫海赵军伟薛军非吴坚
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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