Nickel nanorod-nickel oxide nanosheet hierarchical structure array modified with silver nanoparticles and preparation method and application thereof

A technology of nickel oxide nanosheets and silver nanoparticles, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of not being able to obtain SERS active nickel nanostructure substrates, and achieve regular morphology , Improve SERS activity, the effect of high SERS activity

Inactive Publication Date: 2014-12-10
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are deficiencies in both the product and its preparation method. First, although nickel nanotubes have unknown specific uses, it is difficult to use them as active substrates for surface-enhanced Raman scattering (SERS) to rapidly and sensitively detect Identify the fingerprint feature information of the molecule to be tested; secondly, the preparation method cannot obtain a nickel nanostructure substrate with high SERS activity

Method used

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  • Nickel nanorod-nickel oxide nanosheet hierarchical structure array modified with silver nanoparticles and preparation method and application thereof

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Embodiment 1

[0032] The concrete steps of preparation are:

[0033] In step 1, the aluminum sheet is firstly treated with a secondary anodic oxidation method and a hole expansion method to obtain a through-hole alumina template with a hole diameter of 90 nm and a hole spacing of 20 nm. Then use a magnetron sputtering apparatus to sputter the silver film on one side of the through-hole alumina template; during sputtering, the distance between the alumina template and the silver target is 2cm, the sputtering current is 40mA, and the sputtering time is 10min. Alumina template coated with silver film on one side.

[0034] In step 2, the aluminum oxide template covered with a silver film on one side is used as the cathode, and the graphite is used as the anode, placed in the nickel electrolyte, and electrodeposited at a DC voltage of 1.5V for 2 hours to obtain a nickel nanopillar array in the hole. Alumina template coated with silver film on one side. Place the aluminum oxide template covered...

Embodiment 2

[0038] The concrete steps of preparation are:

[0039] In step 1, the aluminum sheet is firstly treated with a secondary anodic oxidation method and a hole expansion method to obtain a through-hole alumina template with a hole diameter of 93nm and a hole spacing of 23nm. Then use a magnetron sputtering apparatus to sputter the silver film on one side of the through-hole alumina template; during sputtering, the distance between the alumina template and the silver target is 2cm, the sputtering current is 40mA, and the sputtering time is 10min. Alumina template coated with silver film on one side.

[0040] Step 2. First, the aluminum oxide template covered with a silver film is used as the cathode and the graphite as the anode, placed in the nickel electrolyte, and electrodeposited at a DC voltage of 1.75V for 1.8h to obtain an array of nickel nanopillars in the holes. Alumina template coated with silver film on one side. Place the aluminum oxide template covered with silver fi...

Embodiment 3

[0044] The concrete steps of preparation are:

[0045] In step 1, the aluminum sheet is firstly treated with a secondary anodic oxidation method and a hole expansion method to obtain a through-hole alumina template with a hole diameter of 95 nm and a hole spacing of 25 nm. Then use a magnetron sputtering apparatus to sputter the silver film on one side of the through-hole alumina template; during sputtering, the distance between the alumina template and the silver target is 2cm, the sputtering current is 40mA, and the sputtering time is 10min. Alumina template coated with silver film on one side.

[0046] In step 2, the aluminum oxide template covered with a silver film is used as the cathode and the graphite as the anode, placed in the nickel electrolyte, and electrodeposited at a DC voltage of 2V for 1.5h to obtain a nickel nanopillar array in the hole. Alumina template coated with silver film on one side. Place the aluminum oxide template covered with the silver film on t...

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Abstract

The invention discloses a nickel nanorod-nickel oxide nanosheet hierarchical structure array modified with silver nanoparticles and a preparation method and application thereof. The array is a nickel nanorod array which consists of conical top-outcropped nickel nanorods and nickel oxide nanosheets attached onto the nickel nanorods, wherein the nickel nanorod array is located on an alumina template, and the surfaces of the nickel nanorods are all modified with the silver nanoparticles. The method comprises the following steps of: firstly carrying out secondary anodic oxidation, reaming and one-side silver film plating on an aluminum sheet; electrodepositing the aluminum sheet in a nickel electrolyte, and then, chemically removing a silver film, so as to obtain the alumina template, in which nickel nanorod arrays are placed; floating the alumina template on the surface of alkaline liquid, and then, soaking the alumina template in concentrated ammonia, so as to obtain the nickel nanorod array which is located on the alumina template, wherein nickel hydroxide nanosheets are attached onto the conical top-outcropped nickel nanorods of the nickel nanorod array; and calcining the nickel nanorod array, and then, sputtering the silver nanoparticles on the surface of the nickel nanorod array, thereby producing a target product. The nickel nanorod-nickel oxide nanosheet hierarchical structure array modified with the silver nanoparticles can serve as a surface-enhanced Raman scattering active substrate, and the content of rhodamine or tetrachlorobiphenyl attached onto the nickel nanorod-nickel oxide nanosheet hierarchical structure array is measured by using a laser Raman spectrometer.

Description

technical field [0001] The invention relates to a hierarchical structure array, its preparation method and application, in particular to a silver nanoparticle-modified nickel nanocolumn-nickel oxide nanosheet hierarchical structure array, its preparation method and application. Background technique [0002] The transition metal nickel has magnetism and good plasticity, as well as good corrosion resistance. Nano-nickel has attracted more and more attention because of its large specific surface area and excellent properties in many aspects. At present, people have made unremitting efforts to obtain nano-nickel materials, such as a "metallic nickel nanotube and its preparation method" announced on December 10, 2008 in the Chinese invention patent specification CN100441348C. The outer diameter of the metal nickel nanotubes recorded in this manual is 15-150 nanometers; the preparation method first uses the sensitized and activated anodized aluminum porous template as the cathode...

Claims

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Application Information

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IPC IPC(8): C23C28/00C23C14/35C25D3/12G01N21/65B82Y30/00B82Y40/00
Inventor 周琪涛孟国文朱储红钱益武陈斌唐海宾
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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