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Gold nanorod/TiO2 core-shell nanostructure and its one-step synthesis method

A gold nanorod, titanium dioxide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems that are not conducive to the widespread promotion of technology, the loss of gold nanorods, and increase labor costs. The product structure and morphology are easy to control, the repetition rate is high, and the cost is low.

Active Publication Date: 2018-08-10
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/TiO2 core-shell nanostructure and its one-step synthesis method
  • Gold nanorod/TiO2 core-shell nanostructure and its one-step synthesis method
  • Gold nanorod/TiO2 core-shell nanostructure and its one-step synthesis method

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 synthesis method thereof. The synthesis method comprises: dispersing gold nanorods in an aqueous solution containing cetyltrimethylammonium bromide, adjusting the obtained mixed solution to be alkaline, and then adding a titanium source with a lower hydrolysis rate to form a mixed reaction system And carry out the reaction to obtain the gold nanorod / titanium dioxide core-shell nanostructure. The gold nanorod / titanium dioxide core-shell nanostructure comprises gold nanorods and a titanium dioxide shell layer coated on the gold nanorods, and the titanium dioxide layer has a mesoporous structure. The synthesis method of the invention is simple and easy to operate, has mild reaction conditions, high repetition rate, high yield, easy control of product structure and appearance, low cost, environmental friendliness, safety and non-toxicity, and is very easy to be widely popularized and industrialized.

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 Patents(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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