Nanoporous silver supported porous silver oxide nanorod composite material and preparation method thereof

A technology of nanoporous silver and composite materials, which is applied in the field of nanoporous silver-loaded porous silver oxide nanorod composite materials and its preparation, can solve the problems of cumbersome preparation process, easy agglomeration, and difficult recycling, and achieve simple and efficient preparation process. Good for infiltration and hard to fall off

Active Publication Date: 2018-07-31
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method that combines the dealloying process with cyclic voltammetry to solve the problems that the current powdery silver oxide has a cumbersome preparation process, and is prone to agglomeration during use, difficult to recycle after use, and easy to cause secondary pollution. Combining the preparation method of nanoporous silver-loaded porous silver oxide nanorod composite material that can be recycled and has high antibacterial effect

Method used

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  • Nanoporous silver supported porous silver oxide nanorod composite material and preparation method thereof
  • Nanoporous silver supported porous silver oxide nanorod composite material and preparation method thereof
  • Nanoporous silver supported porous silver oxide nanorod composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] Cu with a diameter of Ф1mm 35 Zr 35 Ag 30 The amorphous rods were cut into short rods with a length of 10 mm. It is placed in a corrosive solution for free dealloying. The experimental conditions will contain 0.05M HF and 0.5M HNO 3 The mixed solution is used as the etching solution, the volume ratio of HF and HNO3 solution is 1:1, the etching time is 2h, and the etching temperature is 25°C. After taking it out, it is washed with deionized water to obtain nanoporous silver metal. figure 1 It is a scanning electron micrograph of nanoporous silver in this example, which shows that the obtained nanoporous silver has a three-dimensional (3D) nanoporous morphology with a uniform, bicontinuous ligament / hole structure. The nanoporous silver layer has a thickness of 120 μm, a ligament width of 40 nm, and a pore size of 100 nm.

[0032] A platinum electrode was used as an auxiliary electrode, Ag / AgCl was used as a reference electrode, and the nanoporous silver metal obtain...

Embodiment 2

[0036] Cu with a diameter of Ф1.5mm 40 Zr 40 Ag 20 The amorphous rods were cut into short rods with a length of 10 mm. It is placed in a corrosive solution for free dealloying. The experimental conditions will contain 0.1M HF and 0.6M HNO 3 The mixed solution of HF and HNO is used as the corrosion solution 3 The volume ratio of the solution is 1:1, the corrosion time is 3 hours, and the corrosion temperature is 25°C. After taking it out, it is washed with deionized water to obtain nanoporous silver metal. The as-prepared nanoporous silver has a three-dimensional (3D) nanoporous morphology with a uniform, bicontinuous ligament / hole structure. The nanoporous silver layer has a thickness of 130 μm, a ligament width of 50 nm, and a pore diameter of 150 nm.

[0037] A platinum electrode was used as an auxiliary electrode, Ag / AgCl was used as a reference electrode, and the nanoporous silver metal obtained in the previous step was used as a working electrode to form a three-el...

Embodiment 3

[0041] Cu with a diameter of Ф2mm 45 Zr 45 Ag 10 The amorphous rods were cut into short rods with a length of 10 mm. It is placed in a corrosive solution for free dealloying. The experimental conditions will contain 0.25M HF and 4M HNO 3 The mixed solution of HF and HNO is used as the corrosion solution 3 The volume ratio of the solution is 1:1, the corrosion time is 5 hours, and the corrosion temperature is 25°C. After taking it out, it is washed with deionized water to obtain nanoporous silver metal. The prepared nanoporous silver has a three-dimensional (3D) nanoporous morphology with a uniform, bicontinuous ligament / hole structure. The nanoporous silver layer has a thickness of 160 μm, a ligament width of 110 nm, and a pore size of 100 nm.

[0042] A platinum electrode was used as an auxiliary electrode, Ag / AgCl was used as a reference electrode, and the nanoporous silver metal obtained in the previous step was used as a working electrode to form a three-electrode t...

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Abstract

The invention relates to a nanoporous silver supported porous silver oxide nanorod composite material and a preparation method thereof. The composite material is a bar material, and comprises an amorphous matrix, nanoporous silver covering the amorphous matrix and porous silver oxide nanorods supported on the surface of the nanoporous silver and generated by in-situ oxidation; the amorphous matrixis a CuxZryAgz alloy ingredient, wherein x, y and z are separately an atomic percentage, and value ranges of the x, the y and the z satisfy relationships of 35 <= x <= 45, 35 <= y <= 45, 10 <= z <= 30, and x + y + z=100; the nanoporous silver has a layer thickness of 120-190 [mu]m, a tough band width of 20-120 nm and a pore size of 60-180 nm; and the nanorods gave a diameter of 0.1-1.5 [mu[m anda length of 0.5-12 [mu]m, and a size of nano holes in the nanorods is 10-100 nm. The composite material provided by the invention has a larger specific surface area, and the porous silver oxide nanorods are not easy to fall off, are easy to recycle after being used and can be recycled and reused; and the composite material has unique structural and performance advantages in the field of inorganicbacterium resistance.

Description

Technical field: [0001] The invention relates to the technical field of nanoporous materials, in particular to a nanoporous silver-loaded porous silver oxide nanorod composite material and a preparation method thereof. Background technique: [0002] Silver oxide is widely used in industries such as electronic components, button batteries, antibacterial agents, purifiers, glass colorants, abrasives, and chemical catalysts. [0003] Silver and silver oxide are metals with the best antibacterial properties among inorganic antibacterial agents. A class of antibacterial agents made from metals with low toxicity and bactericidal ability and their ions are called inorganic antibacterial agents, such as silver, copper, and zinc. These metals and their ions have a strong relationship with proteins and active enzyme centers in bacteria or molds. The large binding capacity makes it have antibacterial properties. In principle, silver atoms can be oxidized by oxygen in the air, and fur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N59/16A01P1/00A01P3/00B82Y30/00B82Y40/00
CPCA01N25/08A01N59/16B82Y30/00B82Y40/00
Inventor 秦春玲郑栋辉朱墨王志峰王晗
Owner HEBEI UNIV OF TECH
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