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Supported flower-shaped hierarchical-structure nanoscale precious metal material and preparation method thereof

A technology of flower-like grading and structural materials, applied in metal processing equipment, nanotechnology, transportation and packaging, etc., to achieve the effect of easy operation

Active Publication Date: 2018-04-20
XI'AN PETROLEUM UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the above-mentioned oxidative self-polymerization properties of dopamine, the co-assembly properties of dopamine and other materials need to be further developed

Method used

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  • Supported flower-shaped hierarchical-structure nanoscale precious metal material and preparation method thereof
  • Supported flower-shaped hierarchical-structure nanoscale precious metal material and preparation method thereof
  • Supported flower-shaped hierarchical-structure nanoscale precious metal material and preparation method thereof

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Effect test

Embodiment 1

[0026] 1. Dissolve 20mg of phosphotungstic acid in 10mL of 10mM Tris-HCl buffer solution with a pH of 9.5 to prepare a 2mg / mL phosphotungstic acid solution; dissolve 20mg of dopamine hydrochloride in 10mL of 10mM Tris-HCl buffer with a pH of 9.5 In the solution, prepare a 2mg / mL dopamine hydrochloride solution; shake and mix 10mL2mg / mL phosphotungstic acid solution and 10mL2mg / mL dopamine hydrochloride solution evenly, and the solution turns yellow within a few minutes and gradually becomes turbid After aging for 2 hours at room temperature, the product was collected by centrifugation at 5000rpm, washed 3 times with water, and a flower-like hierarchical structure material assembled with phosphotungstic acid and dopamine was obtained. from figure 1 It can be seen in the figure that dopamine and phosphotungstic acid have been co-assembled to obtain a regular flower-like hierarchical structure material with a size between 1 and 5 μm, which is composed of stacked sheet structures....

Embodiment 2

[0029] 1. Mix 1g of Weakley type Na 9 [EuW 10 o 36 ]·32H 2 O was dissolved in 100 mL of PBS buffer solution with pH 11 to prepare 10 mg / mL of Na 9 [EuW 10 o 36 ]·32H 2 O solution; 1g of dopamine hydrochloride was dissolved in 100mL of PBS buffer solution with a pH of 11 to prepare a 10mg / mL dopamine hydrochloride solution; 100mL of 10mg / mL Na 9 [EuW 10 o 36 ]·32H 2 O solution and 100mL 10mg / mL dopamine hydrochloride solution were oscillated and mixed evenly, the solution turned yellow within a few minutes, and gradually appeared turbid, aged at room temperature for 16 hours, centrifuged at 5000rpm to collect the product, washed 3 times with water, and obtained Na 9 [EuW 10 o 36 ]·32H 2 O Flower-like hierarchically structured material assembled with dopamine.

[0030] 2. Add 5mg Na 9 [EuW 10 o 36 ]·32H 2 The flower-like hierarchical structure material assembled by O and dopamine was dispersed in 5 mL of 1 mg / mL silver nitrate aqueous solution, and the reaction w...

Embodiment 3

[0032] 1. Dissolve 0.25mg of silicomolybdic acid in 0.5mL glycine-sodium hydroxide buffer solution with a pH of 8 to prepare a 0.5mg / mL silicomolybdic acid solution; dissolve 1.5mg of dopamine hydrochloride in 0.5mL of pH 8 8 in glycine-sodium hydroxide buffer solution to prepare 3mg / mL dopamine hydrochloride solution; 0.5mL0.5mg / mL silicomolybdic acid solution and 0.5mL3mg / mL dopamine hydrochloride solution were shaken and mixed evenly, The solution turned yellow within a few minutes and gradually became turbid. After aging at room temperature for 2 hours, the product was collected by centrifugation at 5000 rpm, washed 3 times with water, and a flower-like hierarchical structure material assembled with silicomolybdic acid and dopamine was obtained.

[0033] 2. Disperse 1.5 mg of the flower-like hierarchical structure material assembled with silicomomolybdic acid and dopamine in 1.5 mL of 1 mg / mL silver sulfate aqueous solution, shake and react at room temperature for 10 hours,...

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Abstract

The invention discloses a supported flower-shaped hierarchical-structure nanoscale precious metal material and a preparation method thereof. The method comprises the following steps that firstly, heteropolyacid and dopamine are co-assembled by adopting a chemical self-assembling method so as to obtain the flower-shaped hierarchical structure material assembled by the heteropolyacid and the dopamine; and then the flower-shaped hierarchical structure material is dispersed into a soluble salt aqueous solution of precious metal, pyrocatechol groups of the flower-shaped hierarchical nano-structureis used for reducing precious metal ions in situ so as to prepare the supported flower-shaped hierarchical-structure nanoscale precious metal material. The preparation method has the advantages of being simple and convenient to operate and controllable in height. The prepared supported flower-shaped hierarchical-structure nanoscale precious metal material is a crystal material with a face-centeredcubic structure, is controllable in size and morphology and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of metal nano-materials, and in particular relates to a loaded flower-like hierarchical structure nano-noble metal material and a preparation method thereof. Background technique [0002] Nano-silver is a new type of metal nano-material. Due to its stable physical and chemical properties, it has broad application prospects in the fields of electronics, optics, antibacterial, and catalysis. In particular, nano-silver has strong bactericidal ability, broad-spectrum bactericidal, safe application, and has great application value in the field of antibacterial. There are many forms of nano-silver, such as spherical, cubic, linear, octahedral, triangular, etc. have been found. Different forms of nano-silver have different antibacterial effects. [0003] The preparation methods of nano silver are mainly divided into physical methods, chemical methods and biological methods. Among them, the principle of the physi...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/054
Inventor 李红彭浩南燕永利顾雪凡赵媛媛
Owner XI'AN PETROLEUM UNIVERSITY
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