Graphene oxide/prussian blue nanoparticle composite material solid-phase micro-extraction probe as well as preparation method and application thereof

A technology of Prussian blue and nanoparticles, which is applied in the field of graphene oxide/Prussian blue nanoparticle composite solid-phase microextraction probes and its preparation, can solve the problem of restricting the development and application of solid-phase microextraction technology, and it is difficult to meet the separation and analysis requirements , limited application range of extraction and other issues, to achieve the effect of simple and fast preparation steps, wide application range and controllable thickness

Active Publication Date: 2018-02-06
SUN YAT SEN UNIV
5 Cites 5 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] Although some coatings have been commercialized at present, these probes have disadvantages such as high price (800-900 yuan a piece), unsatisfactory thermal stability, limited application range of extraction, and low ...
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Abstract

The invention relates to a graphene oxide/prussian blue nanoparticle composite material solid-phase micro-extraction probe as well as a preparation method and application thereof. A preparation methodof a graphene oxide/prussian blue nanoparticle composite material comprises the following steps: S1: ultrasonically dispersing graphene oxide into water to obtain a graphene oxide dispersion solution; S2: adding potassium ferricyanide and a hydrochloric acid solution into the graphene oxide dispersion solution under a stirring state to obtain a reaction mixed solution; S3: putting the reaction mixed solution into a container, putting the container into a drying oven and reacting; after reacting, centrifuging and collecting a product and drying to obtain the graphene oxide/prussian blue nanoparticle composite material. The graphene oxide/prussian blue nanoparticle composite material provided by the invention is used as an adsorbent of a solid-phase micro-extraction coating; the material has the advantages of good thermal stability, good chemical stability, more surface functional groups and the like; the prepared solid-phase micro-extraction coating has good thermal resistance, high concentration factor and wide applicable range.

Application Domain

Other chemical processesComponent separation +1

Technology Topic

High concentrationSorbent +12

Image

  • Graphene oxide/prussian blue nanoparticle composite material solid-phase micro-extraction probe as well as preparation method and application thereof
  • Graphene oxide/prussian blue nanoparticle composite material solid-phase micro-extraction probe as well as preparation method and application thereof
  • Graphene oxide/prussian blue nanoparticle composite material solid-phase micro-extraction probe as well as preparation method and application thereof

Examples

  • Experimental program(2)
  • Effect test(3)

Example Embodiment

[0045] Example 1 Preparation of Graphene Oxide/Prussian Blue Nanoparticle Composite Material
[0046] Preparation of graphene oxide/Prussian blue nanoparticle composite material: The composite material is synthesized according to the literature (Chem. Sci. 2015, 6, 4029), and the synthesis method is as follows:
[0047] Take 200 mg of graphene oxide and place it in 50 mL of ultrapure water, and ultrasonicate for 30 min to obtain a uniform graphene oxide dispersion. Subsequently, 170 mg of potassium ferricyanide and 50 mL of 0.01 mol/L hydrochloric acid solution were successively added to the graphene oxide dispersion under stirring to obtain a uniformly mixed reaction mixture. The reaction mixture was placed in the reactor and placed in an oven at 85°C for 24 hours. After the reaction, the product was collected by centrifugation, and the product was dried in a vacuum oven at 60°C for 12 hours, and finally a graphene oxide/Prussian blue nanoparticle composite material was obtained. The microscopic morphology of the composite was characterized by scanning electron microscope. figure 1 It can be observed that the Prussian blue nanoparticles are uniformly distributed in the graphene oxide.

Example Embodiment

[0048] Example 2 Preparation of solid phase microextraction probe for graphene oxide/Prussian blue nanoparticle composite material
[0049] Graphene oxide/Prussian blue nanoparticle composite solid phase microextraction probe preparation, the preparation process is as follows figure 2 , Specifically including the following steps:
[0050] S1. Pretreatment of stainless steel fiber: After cutting the stainless steel fiber into a length of 2 to 3 cm, immerse it in ultrapure water, methanol, and acetone in order, and ultrasonicate it for 30 minutes. Take it out and let it dry naturally.
[0051] S2. The configuration of the neutral silicone rubber diluent: After mixing 0.5 g of the neutral silicone rubber and 1.0 mL of o-xylene, stir it evenly, and ultrasonicate for 5 minutes to obtain the neutral silicone rubber diluent.
[0052] S3. Extend the pretreated stainless steel fiber into the neutral silicone rubber diluent, take it out, and wipe the visible droplets on the surface of the stainless steel fiber with filter paper to obtain a stainless steel fiber coated with a very thin silicone rubber coating on the surface .
[0053] S4. Roll the stainless steel fiber coated with silicone glue in the graphene oxide/Prussian blue nanoparticle composite material and coat it with a layer of composite coating; use tweezers to tap the uncoated part of the stainless steel fiber , Make the non-adherent composite material fall off the stainless steel fiber, and obtain a single-layer composite solid-phase micro-extraction probe with uniform surface; put the probe in the oven.
[0054] Repeat the above-mentioned S3 and S4 coating steps twice to obtain a solid phase microextraction coating with a three-layer graphene oxide/Prussian blue nanoparticle composite material with a thickness of 16.5 µm.
[0055] Under the protection of nitrogen, the obtained probe was aged at 250°C for 60 min, and the aged probe was inserted into the SPME sleeve. Use scanning electron microscopy to characterize the micro morphology of the extracted probe, such as image 3 Shown.
[0056] The probe was aged at 250℃ for 20 min under nitrogen protection before each use.
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PUM

PropertyMeasurementUnit
Length1.0 ~ 2.0cm
Thickness5.0 ~ 50.0µm
Thickness16.5µm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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