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Preparation method for gold nanoring

A gold nano and palladium nano technology, applied in the field of nano materials, can solve the problems of flower-shaped gold nano particles, such as uneven size, unfavorable industrial production, high cost of trypsin, etc., and achieve easy preparation and preservation, uniform size and repeatability high effect

Active Publication Date: 2016-04-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the flower-shaped gold nanoparticles obtained by this preparation method is not uniform, and the cost of using trypsin is relatively high, and the reaction conditions are relatively harsh, which is not conducive to industrial production

Method used

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  • Preparation method for gold nanoring
  • Preparation method for gold nanoring
  • Preparation method for gold nanoring

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Experimental program
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Effect test

Embodiment 1

[0030] Step 1: Dissolve 16mg of palladium acetylacetonate, 60mg of cetyltrimethylammonium bromide, 100mg of tungsten carbonyl, 90mg of citric acid and 30mg of polyvinylpyrrolidone in 10mLN, N dimethylformamide, and stir for 1h to make each substance Fully dissolved, the reaction solution was transferred to a 25mL round bottom flask, and reacted at 80°C for 1h. After the reaction is completed, the reaction solution is centrifuged to obtain hexagonal palladium nanosheets. The morphology of palladium nanosheets is as figure 1 As shown in (a), the average side length of the hexagonal palladium nanosheets is 18 nm.

[0031] Step 2: the 0.175mg palladium nanosheet obtained in step 1 with 150mg ascorbic acid and 200mg polyvinylpyrrolidone (M w =29000) into the mixed solution of 3mLN,N dimethylformamide and 2mL water, stirred to fully dissolve ascorbic acid and polyvinylpyrrolidone, transferred the reaction solution to a 25mL strain bottle, and reacted and stirred at 0°C. The 5mL c...

Embodiment 2

[0033] Step 1: Dissolve 16mg of palladium acetylacetonate, 60mg of cetyltrimethylammonium bromide, 100mg of tungsten carbonyl, 90mg of citric acid and 30mg of polyvinylpyrrolidone in 10mLN, N dimethylformamide, and stir for 1h to make each substance Fully dissolved, the reaction solution was transferred to a 25mL round bottom flask, and reacted at 80°C for 1h. After the reaction is completed, the reaction solution is centrifuged to obtain hexagonal palladium nanosheets. The morphology of palladium nanosheets is as figure 1As shown in (a), the average side length of the hexagonal palladium nanosheets is 18 nm.

[0034] Step 2: the 0.175mg palladium nanoplatelet that obtains in step 1 and 200mg ascorbic acid and 200mg polyvinylpyrrolidone (M w =29000) into the mixed solution of 3mLN,N dimethylformamide and 2mL water, stirred to fully dissolve ascorbic acid and polyvinylpyrrolidone, transferred the reaction solution to a 25mL strain bottle, and reacted and stirred at 0°C. Dilu...

Embodiment 3

[0036] Step 1: Dissolve 16mg of palladium acetylacetonate, 60mg of cetyltrimethylammonium bromide, 100mg of tungsten carbonyl, 90mg of citric acid and 30mg of polyvinylpyrrolidone in 10mLN, N dimethylformamide, and stir for 1h to make each substance Fully dissolved, the reaction solution was transferred to a 25mL round bottom flask, and reacted at 80°C for 1h. After the reaction is completed, the reaction solution is centrifuged to obtain hexagonal palladium nanosheets. The morphology of palladium nanosheets is as figure 1 As shown in (a), the average side length of the hexagonal palladium nanosheets is 18 nm.

[0037] Step 2: the 0.175mg palladium nanosheet that obtains in step 1 and 250mg ascorbic acid and 200mg polyvinylpyrrolidone (M w =29000) into the mixed solution of 3mLN,N dimethylformamide and 2mL water, stirred to fully dissolve ascorbic acid and polyvinylpyrrolidone, transferred the reaction solution to a 25mL strain bottle, and reacted and stirred at 0°C. Dilute...

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Abstract

The invention relates to a preparation method for a gold nanoring. The preparation method comprises the following steps: dissolving a palladium nano sheet, ascorbic acid and a dispersing agent into a solvent, wherein in the palladium nano sheet, the concentration of palladium atoms in a solution is 2.0*10<-4>-1.4*10<-3>mol / L, and the concentration of the ascorbic acid in the solution is 0.1-0.5mol / L; and then, injecting a chloroauric acid aqueous solution into the solution, and reacting at a temperature of 0-35 DEG C to obtain the gold nanoring, wherein a molar ratio of the ascorbic acid to the palladium atoms in the palladium nano sheet is 7:1 to 25:1. The preparation method is simple, is high in repeatability and is low in cost; and the prepared gold nanoring has a hollow structure, is uniform in dimension and is good in dispersion, and is adjustable in dimension and wall thickness.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a method for preparing a gold nanoring. Background technique [0002] In recent years, gold-based nanocrystals have aroused great interest. Gold nanoparticles have obvious surface effects, volume effects, quantum effects, small size effects, etc., and their optical, electronic, sensing, and biochemical properties have become current research hotspot. Chinese invention patent (CN102218542A) discloses a preparation method of nano gold, which adopts the method of combining heating uniform precipitation and high temperature thermal decomposition to prepare nano gold, using water as solvent, AuCl 3 .HCl.4H 2 O is the raw material, CO(NH 2 ) 2 As an additive, polyethylene glycol is used as a dispersant to prepare nano-gold, and the synthesis system is a single aqueous phase, but the gold nanoparticles prepared by this method do not have a specific shape, and the material properties are...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/07
Inventor 张辉王文星颜聿聪杨德仁
Owner ZHEJIANG UNIV
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