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Electro-catalysis application of horseradish peroxidase sensor constructed by black phosphorus-based composite material

A technology of composite materials and nanocomposites, which is applied in the field of preparation of electrochemical sensors, can solve problems such as poor stability, and achieve the effects of improving conductivity, high surface activity, and good biocompatibility

Pending Publication Date: 2022-08-05
HAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the in-depth research on BP materials, some shortcomings of BP are also exposed, such as poor stability, BP exposed to air or placed in aqueous solution under the condition of light will degrade to form non-toxic PxOy oxide

Method used

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  • Electro-catalysis application of horseradish peroxidase sensor constructed by black phosphorus-based composite material
  • Electro-catalysis application of horseradish peroxidase sensor constructed by black phosphorus-based composite material
  • Electro-catalysis application of horseradish peroxidase sensor constructed by black phosphorus-based composite material

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preparation example Construction

[0027] In the present invention, the preparation method of the thin-layer BPNs-SWCNTs nanocomposite material and its modified electrode to obtain the preparation method of BPNs-SWCNTs / CILE preferably include the following steps:

[0028] First, thin-layer BPNs-SWCNTs nanocomposites were prepared by liquid phase exfoliation method and physical mixing method. Then the CILE and composite nanomaterials were put into the glove box, the glove box was evacuated, and then N 2 , and then a thin layer of BPNs-SWCNTs was drop-coated on the surface of CILE, and after natural drying, the BPNs-SWCNTs / CILE modified electrode was obtained.

[0029] In the present invention, the BPNs dispersion liquid is a thin-layer BPNs dispersion liquid; in the present invention, the BPNPs are preferably pretreated, and in the present invention, the pretreatment preferably includes: ultrasonicating the BPNPs solution, and the ultrasonic time It is preferably 8-12 h, more preferably 12 h, centrifuged at 100...

Embodiment 1

[0036] First, the BPNPs and NMP were mixed in an ice bath and sonicated for 12 hours, and then centrifuged at 10,000 rmp and 12,000 rmp for 20 minutes to prepare a thin-layer BPNs dispersion; the BPNs dispersion was mixed with SWCNTs by a physical mixing method and ultrasonicated for 4 hours to obtain a thin layer. BPNs-SWCNTs nanocomposite; polish the surface of the CILE electrode, put it into the glove box together with the composite, evacuated the glove box, and then passed N 2 ; First drop-coating BPNs-SWCNTs nanocomposite on the surface of CILE, and after natural drying, the BPNs-SWCNTs / CILE modified electrode was obtained. Other modified electrodes SWCNTs / CILE and BPNs / CILE were prepared by coating method, and BPNs / CILE and BPNs-SWCNTs / CILE electrodes did not need to be stored in a refrigerator at 4 °C.

[0037] figure 1 SEM and TEM images of different materials, among which, figure 1 A is the scanning electron microscope photo of the multilayer BPNPs with a scale of 1...

Embodiment 2

[0047] The BPNs-SWCNTs / CILE modified electrode obtained in Example 1; after drying at room temperature, HRP was dropped on the BPNs-SWCNTs / CILE electrode to obtain the HRP / BPNs-SWCNTs / CILE modified electrode; then Nafion was added dropwise on the above electrode, After natural drying, the prepared modified electrode Nafion / HRP / BPNs-SWCNTs / CILE. Other modified electrodes Nafion / HRP / CILE, Nafion / HRP / SWCNTs / CILE and Nafion / HRP / BPNs / CILE were prepared by the same method. All electrodes do not need to be stored in a refrigerator at 4°C.

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Abstract

The invention relates to preparation of a thin-layer black phosphorene / single-walled carbon nanotube composite material and electro-catalysis application of the thin-layer black phosphorene / single-walled carbon nanotube composite material in construction of a horseradish peroxidase electrochemical sensor. A nano composite material is prepared by adopting a liquid phase stripping method and a physical mixing method and is used for modifying horse radish peroxidase to construct an enzyme electrochemical sensor, and the enzyme electrochemical sensor is applied to electrocatalysis of trichloroacetic acid, sodium nitrite and hydrogen peroxide. The preparation method mainly comprises the following steps: preparing thin-layer black phosphorene, compounding the thin-layer black phosphorene with a single-walled carbon nanotube, preparing a thin-layer black phosphorene / single-walled carbon nanotube composite material, modifying the surface of an ionic liquid electrode with the composite material, preparing the enzyme electrochemical sensor with a sandwich structure, and performing electro-catalysis application of the enzyme electrochemical sensor. The composite material prepared by the invention has the advantages of larger effective area, special morphology and stronger conductivity, can improve the stability and dispersity of black phosphorene, and is simple in preparation process, sensitive in detection and good in determination effect.

Description

technical field [0001] The invention belongs to the preparation method and application field of an electrochemical sensor, and relates to the preparation of a black phosphorene (BPNs) / single-walled carbon nanotube (SWCNTs) composite material and an electrochemical sensor for constructing a horseradish peroxidase (HRP) electrochemical sensor. Catalytic applications. Background technique [0002] Black phosphorus (BP) is an allotrope of phosphorus, commonly known as phosphorene. Two adjacent BP layers are superimposed together by van der Waals force. This unique layered structure makes black phosphorus have many excellent properties. Such as direct bandgap with controllable number of layers, high carrier mobility, obvious anisotropy and good biocompatibility, which are widely used in photoelectrochemistry, biomedicine, solar cells, lithium-ion batteries / sodium-ion batteries , transistors, electronic components and other fields have broad application prospects. With the in-de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/159C01B32/174C01B25/00G01N27/327G01N27/48
CPCC01B32/159C01B32/174C01B25/003G01N27/327G01N27/48Y02E60/50
Inventor 孙伟李小青姚昱岑王宝丽艾益静邵波张程
Owner HAINAN NORMAL UNIV
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