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Graphene-magnetic nanowire probe and preparation method thereof

A graphene and nanowire array technology, applied in graphene, nanocarbon, separation methods, etc., can solve the problems of short life, high price, poor stability, etc., and achieve the effects of good binding, simple method and good stability

Active Publication Date: 2021-12-21
丁道其
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current solid-phase microextraction probes are mainly based on fused silica fibers, which are expensive, poor in stability, and short in life.

Method used

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  • Graphene-magnetic nanowire probe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A graphene-Fe3O4 solid-phase microextraction probe, its preparation method is as follows:

[0025] (1) After cleaning and drying the metal wire, hot-dip aluminum coating on the surface of the metal wire, the thickness of the aluminum coating layer is 20um, and then anodize the aluminum coating layer, and after forming nano-scale channels on the aluminum coating layer, clean and dry spare;

[0026] (2) Mix FeCl3, sodium citrate, sodium acetate, and ethylene glycol, stir to dissolve, and disperse evenly by ultrasonic to obtain a sol; the mass ratio of FeCl3, sodium citrate, and sodium acetate is 2:1:4; The volume consumption of ethylene glycol is 30mL / g based on the quality of FeCl3;

[0027] (3) Apply the sol of step (2) on the surface of the metal wire prepared in step (1), and apply ultrasonic vibration for 20 minutes to promote the penetration of the sol into the nanoscale pores, and then immerse it in the sol of step (2) , after being heated to 200°C for 6 hours, t...

Embodiment 2

[0031] A graphene-Fe3O4 solid-phase microextraction probe, its preparation method is as follows:

[0032] (1) After cleaning and drying the metal wire, hot-dip aluminum coating on the surface of the metal wire, the thickness of the aluminum coating layer is 50um, and then anodize the aluminum coating layer, and after forming nano-scale channels on the aluminum coating layer, clean and dry spare;

[0033] (2) Mix FeCl3, sodium citrate, sodium acetate, and ethylene glycol, stir to dissolve, and disperse evenly by ultrasonic to obtain a sol; the mass ratio of FeCl3, sodium citrate, and sodium acetate is 2:1:4; The volume consumption of ethylene glycol is 50mL / g based on the quality of FeCl3;

[0034] (3) Apply the sol of step (2) on the surface of the metal wire prepared in step (1), and apply ultrasonic vibration for 30 minutes to promote the penetration of the sol into the nanoscale pores, and then immerse it in the sol of step (2) , after being heated to 200°C for 10 hours, ...

Embodiment 3

[0038] A graphene-Fe3O4 solid-phase microextraction probe, its preparation method is as follows:

[0039] (1) After cleaning and drying the metal wire, hot-dip aluminum coating on the surface of the metal wire, the thickness of the aluminum coating layer is 5um, and then anodize the aluminum coating layer, and after forming nano-scale channels on the aluminum coating layer, clean and dry spare;

[0040] (2) Mix FeCl3, sodium citrate, sodium acetate, and ethylene glycol, stir to dissolve, and disperse evenly by ultrasonic to obtain a sol; the mass ratio of FeCl3, sodium citrate, and sodium acetate is 2:1:4; The volume consumption of ethylene glycol is 30mL / g based on the quality of FeCl3;

[0041] (3) Apply the sol of step (2) on the surface of the metal wire prepared in step (1), and apply ultrasonic vibration for 10 minutes to promote the penetration of the sol into the nanoscale pores, and then immerse it in the sol of step (2) , after being heated to 200°C for 5 hours, co...

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Abstract

The present invention relates to a kind of graphene-Fe 3 o 4 A solid-phase microextraction probe, the substrate of which is a metal wire, is characterized in that Fe is sequentially deposited on the surface of the metal wire 3 o 4 Nanowire arrays and graphene nanocrystals. Fe 3 o 4 Nanowire arrays were prepared by template-hydrothermal method; graphene nanocrystals were deposited by electron cyclotron plasma sputtering. The graphene two-dimensional nanomaterial is fully utilized, which has a large specific surface area, so that the probe has a good extraction and enrichment effect, and the probe has high sensitivity and good stability. Through the template-hydrothermal method, the porous structure of anodized aluminum is pre-obtained on the surface of the metal wire to realize Fe 3 o 4 The controllable growth of the nanowire array ensures the subsequent deposition of graphene nanocrystals. direct magnetic Fe 3 o 4 The nanowire array is deposited between the metal wire and the graphene nanocrystal, and the probe can optimize the extraction effect by applying an external magnetic field during the process of processing the sample, and the method is simple.

Description

technical field [0001] The invention relates to a probe used in the field of solid-phase microextraction, in particular to a graphene-magnetic nanowire array solid-phase microextraction probe and a preparation method thereof. Background technique [0002] Solid Phase Microextraction (SPME) technology is a sample analysis and determination technology, which can be used in conjunction with gas chromatography, liquid chromatography, mass spectrometry, electrophoresis and other instruments, and is widely used in food analysis, environmental analysis, biological sample analysis, Drug analysis and other fields. [0003] Solid-phase microextraction probe is the core component of solid-phase microextraction technology. However, the current solid-phase microextraction probes are mainly based on fused silica fibers, which are expensive, poor in stability, and short in life. It is necessary to develop new solid-phase microextraction probes with high sensitivity, good stability, low c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/186C01G49/08B01D15/08B01D15/22
CPCC01B32/186C01G49/08B01D15/08B01D15/22C01P2006/42C01P2004/16C01B2204/20
Inventor 张瑞秀
Owner 丁道其
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