Preparation method of dopamine sensor material based on Prussian blue/molybdenum selenide

A Prussian blue sensor technology, applied in the field of Prussian blue/molybdenum selenide-based dopamine sensor materials and its preparation, can solve the problems of inconvenient portability, complicated pretreatment, cumbersome steps, etc., and achieve easy functionalization and multiple reaction sites , the effect of large specific surface area

Active Publication Date: 2021-01-19
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Commonly used detection methods for dopamine, such as fluorescence, chromatography, and colorimetry, generally have the disadvantages of complicated pretreatment, cumbersome steps, and inconvenient portability.

Method used

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  • Preparation method of dopamine sensor material based on Prussian blue/molybdenum selenide
  • Preparation method of dopamine sensor material based on Prussian blue/molybdenum selenide
  • Preparation method of dopamine sensor material based on Prussian blue/molybdenum selenide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A PB / MoSe 2 / GF composite electrode material preparation method, the steps are as follows:

[0037] (1) Activate GF

[0038] Cut the polyacrylonitrile-based graphite fiber GF into 2cm×1cm×1mm thin slices, dissolve the viscose on the surface of the cut GF with methanol, and remove the grease on it; then wash it with ultrapure water, alternately until no until scum, 50 ℃ vacuum drying. Select 10 pieces of dried GF and put them into 80mL concentrated nitric acid and reflux at 95-100°C for 3h to enhance the surface roughness and enhance the hydrophilicity of the material, then wash with ultrapure water until neutral, and vacuum dry at 50°C for 12h.

[0039] (2) Preparation of MoSe 2 Nanosheets

[0040] 0.24g Na 2 MoO 4 2H 2O (1mmol), 0.16g Se powder (2mmol) and 0.15g NaBH 4 (4mmol) was dissolved in 30mL ultrapure water. The suspension was ultrasonically dispersed for 10 min and vigorously magnetically stirred for 50 min to obtain a uniform black solution. Subseque...

Embodiment 2

[0048] A MoSe 2 The preparation method of the / GF composite electrode differs from Example 1 in that steps (3) and (4) are omitted; the PB / MoSe in step (5) 2 Replaced by MoSe 2 , the dosage is 1.0 mg; the rest of the steps are the same as in Example 1.

Embodiment 3

[0050] A kind of preparation method of PB / GF composite electrode, and the difference of embodiment 1 is: omit step (2), (4); In step (3), the A liquid of equal volume and containing 2.0mmol / L FeCl 2 , 0.2mmol / L KCl and 0.05mmol / L HCl aqueous solution were mixed and reacted for 12h, centrifuged, washed alternately with ultrapure water and ethanol, and vacuum-dried at 50°C for 12h to obtain the PB material; the PB / MoSe in (5) 2 Replace it with PB powder, the dosage is 1.0 mg; the rest of the steps are the same as in Example 1.

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Abstract

The invention discloses a preparation method of a dopamine sensor material based on Prussian blue/molybdenum selenide, which comprises the following steps: carrying out hydrothermal reaction on sodiummolybdate and selenium powder under the action of sodium borohydride to obtain a two-dimensional layered material molybdenum selenide, and reducing Fe < 3 + > into Fe < 2 + > to promote the generation of Prussian blue, thereby obtaining the Prussian blue/molybdenum selenide composite material, then dispersing the composite material onto the activated graphite felt; the invention further providesa product obtained according to the method and application. The PB/MoSe2/GF electrochemical sensor prepared by the method has rapid, sensitive and high-selectivity electrochemical response to a targetmolecule dopamine; the method can be used for determining human urine and fetal calf serum, and the recovery rate range of a standard addition method is 97.699.2%.

Description

technical field [0001] The invention belongs to the technical field of nanotechnology and electrochemical sensors, and in particular relates to a dopamine sensor material based on Prussian blue / molybdenum selenide and a preparation method thereof. Background technique [0002] Dopamine is one of the key neurotransmitters in the central nervous system. The system regulation disorder of dopamine is related to Parkinson's disease, schizophrenia, attention deficit hyperactivity syndrome and the occurrence of pituitary tumors, so the accurate detection of dopamine is very important. [0003] Commonly used detection methods for dopamine, such as fluorescence, chromatography, and colorimetry, generally have defects such as complicated pretreatment, cumbersome steps, and inconvenient portability. In order to avoid the above-mentioned disadvantages, an electrochemical sensor for dopamine has emerged, which has the advantages of simple operation, low cost, fast response, high sensitiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327G01N27/48
CPCG01N27/327G01N27/48
Inventor 方建赵紫宇赵继华
Owner LANZHOU UNIVERSITY
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