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Metal/carbon nanotube composite filter membrane, manufacturing method and application

A carbon nanotube composite and carbon nanotube technology, which is applied in the direction of carbon nanotubes, multi-walled carbon nanotubes, nanocarbons, etc., can solve the disadvantages of high-throughput, fast, highly sensitive detection, long interaction time, contact Low probability and other issues, to achieve the effect of strong surface-enhanced Raman scattering optical signal enhancement ability, low cost, and good adsorption

Pending Publication Date: 2021-08-31
JINLING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The SERS detection method usually used for the target analyte in the liquid is mainly based on the free noble metal nanoparticles in the solution and the silica glass slide assembled with the noble metal nanoparticles. Taking the SERS probe based on gold nanospheres as an example, a certain amount of The fluidity of the liquid to be tested is put into a test tube, and then the SERS probe solution containing free gold nanospheres is mixed with the liquid to be tested for a period of time, so that the liquid to be tested is fully combined with the noble metal nanoparticles to

Method used

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  • Metal/carbon nanotube composite filter membrane, manufacturing method and application
  • Metal/carbon nanotube composite filter membrane, manufacturing method and application
  • Metal/carbon nanotube composite filter membrane, manufacturing method and application

Examples

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Embodiment 1

[0046] An embodiment of the present invention provides a metal / carbon nanotube composite filter membrane, the filter membrane structure includes a filter adsorption layer and a Raman scattering enhancement layer, and the filter adsorption layer is a carbon nanotube formed by functionalized carbon nanotubes net, the Raman scattering enhancement layer is a metal nanoparticle layer modified and deposited on the carbon nanotube net; the carbon nanotube is a long multi-walled carbon nanotube; the metal nanoparticle layer is a gold-core silver-shell nanoparticle layer.

[0047] Specifically, the method of the present invention will be further described by taking the metal / carbon nanotube composite filter membrane as an example to filter a solution containing pATP (p-mercaptoaniline) as a Raman molecule.

[0048] The inventive method comprises the following steps:

[0049] S1. Preparation of water-soluble carbon nanotubes:

[0050] The original carbon nanotubes with a length of 2 u...

Embodiment 2

[0063] The preparation method of the metal / carbon nanotube composite filter membrane of this embodiment is the same as that of Example 1, except that p-mercaptoaniline is replaced with 4-mercaptobenzoic acid, that is, the metal / carbon nanotube composite filter membrane containing 4MBA (4 -mercaptobenzoic acid) as a solution of Raman molecules, Figure 5 It is the SERS spectrogram of this embodiment.

[0064] In the present invention, the electrical properties of long carbon nanotubes are modified by polymer wrapping, fiber filter membranes are used as supports, and long carbon nanotubes with different electrical properties are deposited and interwoven on the fiber filter membranes by means of electrostatic adsorption, and then the modified gold cores are The carbon nanotube composite of silver-shell nanoparticles is suction-filtered and deposited on the uppermost layer as a surface-enhanced Raman scattering enhancement substrate to form a filter membrane of a metal / carbon nano...

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Abstract

The invention provides a metal/carbon nanotube composite filter membrane, a manufacturing method and application. A filter membrane structure comprises a filter adsorption layer and a Raman scattering enhancement layer, the filter adsorption layer is a carbon nanotube network formed by functionalized carbon nanotubes, and the Raman scattering enhancement layer is a metal nanoparticle layer modified and deposited on the carbon nanotube network. According to the invention, the electrical property of long carbon nanotubes is changed by adopting a polymer wrapping mode, the long carbon nanotubes with different electrical properties are deposited on a fiber filter membrane by utilizing an electrostatic adsorption effect, and then a carbon nanotube compound for modifying gold-core silver-shell nanoparticles is deposited. According to the invention, the long carbon nanotubes and the gold-core silver-shell nanoparticles are combined to form the three-dimensional SERS activated carbon-based filter membrane with adjustable aperture, adsorption and screening functions and multiple surface-enhanced Raman scattering hot spots, so that the surface-enhanced Raman scattering enhancement factors of the filter membrane are increased, the specific surface area of the filter membrane is increased, and the separation and detection capabilities of the to-be-detected object in the liquid environment are realized.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a metal / carbon nanotube composite filter membrane, a manufacturing method and an application. Background technique [0002] In recent years, with the rapid development of nanomaterial preparation and surface-enhanced scattering-based technology applications, surface-enhanced Raman scattering substrates based on nanomaterials have been used in in vitro medical diagnosis with their unique structures and high signal intensity, high sensitivity, and target detection functions. And water environment monitoring field has great application prospects. [0003] In optical detection technology, surface-enhanced Raman scattering (SERS) technology has the characteristics of narrow spectral lines, mild detection conditions, less damage to biological samples, and not easy to photobleach due to its ultra-high sensitivity and unique "fingerprint" spectral characteris...

Claims

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Application Information

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IPC IPC(8): G01N21/65C01B32/168
CPCG01N21/658C01B32/168C01B2202/06C01B2202/20
Inventor 陈鹏祁正青朱荣刚孟超
Owner JINLING INST OF TECH