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Silver nanoparticle-zinc oxide porous nanosheet-carbon fiber cloth composite substrate as well as preparation method and use of substrate

A silver nanoparticle and zinc oxide nanotechnology, which is applied in metal material coating process, superimposed layer plating, coating and other directions, can solve the problems of effective surface area discount, structural stability is difficult to guarantee, specific surface area cannot be obtained, etc. Achieve the effect of scientific preparation method, stable structure and easy industrialization

Inactive Publication Date: 2014-06-18
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, both the product and its preparation method have shortcomings. First, although the product has a chemical enhancement effect, it is easy to pile up because the zinc oxide porous nanosheets are not fixed with the substrate, which not only makes the Its effective surface area is greatly reduced, and it is difficult to guarantee the stability of the structure when it is used as a SERS active substrate; secondly, the preparation method cannot obtain a SERS active substrate with a high specific surface area and good structural stability, especially a physical enhancement effect. Composite SERS active substrate

Method used

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  • Silver nanoparticle-zinc oxide porous nanosheet-carbon fiber cloth composite substrate as well as preparation method and use of substrate
  • Silver nanoparticle-zinc oxide porous nanosheet-carbon fiber cloth composite substrate as well as preparation method and use of substrate
  • Silver nanoparticle-zinc oxide porous nanosheet-carbon fiber cloth composite substrate as well as preparation method and use of substrate

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Experimental program
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Effect test

Embodiment 1

[0041] The specific steps of preparation are:

[0042] Step 1. Firstly, an atomic layer deposition technique is used to grow a zinc oxide seed layer with a thickness of ≥50 nm on the carbon fiber cloth. Suspend the carbon fiber cloth covered with the zinc oxide seed layer in the precursor solution and soak for 12 hours at a temperature of 80°C. The precursor solution consists of urea with a concentration of 1.5 mol / L and a concentration of 0.6 mol / L. The zinc nitrate is prepared in a volume ratio of 0.8:1.2 to obtain a carbon fiber cloth covered with a precursor.

[0043] Step 2: First, rinse the carbon fiber cloth covered with the precursor with deionized water, and then anneal it at 330° C. for 34 minutes to obtain a carbon fiber cloth with zinc oxide porous nanosheets standing on the surface. Then, the silver nano-particles were ion sputtered on the carbon fiber cloth with the zinc oxide porous nano-sheets erected on the surface; wherein, the sputtering current during the sputt...

Embodiment 2

[0045] The specific steps of preparation are:

[0046] Step 1. Firstly, an atomic layer deposition technique is used to grow a zinc oxide seed layer with a thickness of ≥50 nm on the carbon fiber cloth. Then the carbon fiber cloth covered with zinc oxide seed layer was suspended in the precursor solution and soaked for 11.5h at a temperature of 85°C. The precursor solution was composed of urea with a concentration of 1.8mol / L and a concentration of 0.5mol / L. L zinc nitrate was prepared in a volume ratio of 0.9:1.1 to obtain a carbon fiber cloth coated with a precursor.

[0047] In step 2, the carbon fiber cloth covered with the precursor is washed with deionized water, and then annealed at 340° C. for 33 minutes to obtain a carbon fiber cloth with zinc oxide porous nanosheets standing on the surface. Then, the silver nano-particles were ion sputtered on the carbon fiber cloth with the zinc oxide porous nano-sheets erected on the surface; wherein, the sputtering current during the ...

Embodiment 3

[0049] The specific steps of preparation are:

[0050] Step 1. Firstly, an atomic layer deposition technique is used to grow a zinc oxide seed layer with a thickness of ≥50 nm on the carbon fiber cloth. Suspend the carbon fiber cloth covered with zinc oxide seed layer in the precursor solution and soak it for 11 hours at a temperature of 90°C. The precursor solution consists of 2mol / L urea and 0.4mol / L urea. Zinc nitrate is prepared at a volume ratio of 1:1 to obtain a carbon fiber cloth covered with a precursor.

[0051] Step 2: First, rinse the carbon fiber cloth covered with the precursor with deionized water, and then anneal it at 350° C. for 32 minutes to obtain a carbon fiber cloth with zinc oxide porous nanosheets erected on the surface. Then, the silver nano-particles were ion sputtered on the carbon fiber cloth with the zinc oxide porous nano-sheets erected on the surface; wherein, the sputtering current during the sputtering of the silver nano-particles was 40 mA and the...

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Abstract

The invention discloses a silver nanoparticle-zinc oxide porous nanosheet-carbon fiber cloth composite substrate as well as a preparation method and use of the substrate. The substrate is formed by the zinc oxide porous nanosheet formed by zinc oxide nanoparticles and erected on the carbon fiber cloth, and the silver nanoparticles modify the surface, wherein the height of the zinc oxide porous nanosheet is 11-12 mu m, the width of the zinc oxide porous nanosheet is 7-10 mu m and the thickness of the zinc oxide porous nanosheet is 20-30nm; the grain size of the zinc oxide nanoparticles is 15-25nm, and the grain size of the silver nanoparticles is 15-120nm. The method comprises the following steps: firstly, growing a zinc oxide seed crystal layer on the carbon fiber cloth by an atomic layer deposition technology; then, suspending the layer in a precursor liquid to be soaked to obtain the carbon fiber cloth coated with a precursor on the surface; then, annealing first to obtain the carbon fiber cloth with the zinc oxide porous nanosheet on the surface; and then, carrying out ion sputtering on the silver nanoparticles to prepare a target product. The substrate can be used as an active substrate with surface enhanced Raman scattering, and the content of rhodamine or tetrachlorobiphenyl attached to the substrate is measured by using a laser Raman spectrometer.

Description

Technical field [0001] The invention relates to a composite substrate and a preparation method and use thereof, in particular to a silver nano particle-zinc oxide porous nano sheet-carbon fiber cloth composite substrate and a preparation method and use thereof. Background technique [0002] Recent studies have shown that Surface Enhanced Raman Scattering (SERS) technology has obvious advantages in achieving rapid detection of trace organic pollutants. For this reason, people have made unremitting efforts to obtain SERS substrates with high SERS activity and uniform and stable signals, such as the title "Precursor-Directed Self-Assembly of Porous ZnO Nanosheets as High-Performance Surface-Enhanced Raman Scattering Substrate" Small 2014, 10 , 48-51 ("Porous zinc oxide nanosheets formed by self-assembly as a precursor of high-performance surface Raman enhanced substrate" "Microscale" 2014, Issue 10, pages 48-51). The preparation principle of the zinc oxide porous nanosheet mentione...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00
Inventor 汪志伟孟国文李中波周琪涛刘菁
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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