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Preparation and application of tungsten disulphide nanosphere/carbon nano fibre composite material

A carbon nanofiber and tungsten disulfide technology, which is applied in the fields of tungsten compounds, analytical materials, and fiber chemical characteristics, can solve the problems of poor selectivity, metal toxicity, and low sensitivity, and achieve low cost, high sensitivity, and fast response.

Inactive Publication Date: 2019-01-01
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems of high cost, metal toxicity, low sensitivity and poor selectivity when existing materials are applied to dopamine detection, thereby providing a preparation method of tungsten disulfide nanosphere / carbon nanofiber composite material

Method used

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  • Preparation and application of tungsten disulphide nanosphere/carbon nano fibre composite material
  • Preparation and application of tungsten disulphide nanosphere/carbon nano fibre composite material
  • Preparation and application of tungsten disulphide nanosphere/carbon nano fibre composite material

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specific Embodiment approach 1

[0025] Specific embodiment one: the preparation method of a kind of tungsten disulfide nanosphere / carbon nanofiber composite material in this embodiment, is specifically carried out according to the following steps:

[0026] 1. Preparation of carbon nanofibers by electrospinning

[0027] 1) Dissolve 0.5-1.5 g of polyacrylonitrile powder in 5-15 mL of dimethylformamide solution, and heat and stir at a temperature of 70°C-140°C for 0.5-1.5 h to obtain an electrospinning solution; then , transfer 5-15 mL of the above solution into a syringe, fix the syringe on the syringe pump, and carry out electrospinning at a voltage of 15-25 KV, the flow rate of the solution is 0.5-1.5 mL / h, and the collection distance is 5-15 cm;

[0028] 2) Put the polyacrylonitrile fiber in a blast drying oven, raise the temperature to 250~350℃ at a speed of 1~3℃ / min, and keep it warm for 0.5~1.5h for stabilization treatment;

[0029] 3) Place the stabilized polyacrylonitrile fiber in the center of the t...

specific Embodiment approach 2

[0034] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1 1), 1 g of polyacrylonitrile powder is dissolved in 10 mL of dimethylformamide solution, and stirred at a temperature of 100 ° C for 1 h, The electrospinning solution was obtained, and the solution was transferred to a 10 mL syringe, and then the syringe was fixed on the syringe pump. The electrospinning voltage was controlled at 120 KV, the distance from the receiving device to the spinning needle was 10 cm, and the solution flow rate was 1mL / h, electrospinning in an electrospinning device to obtain polyacrylonitrile fibers; others are the same as in Embodiment 1;

specific Embodiment approach 3

[0035]Specific embodiment 3: The difference between this embodiment and one of specific embodiments 1 to 2 is that in step 1 3), the polyacrylonitrile fiber after step 2) after the stabilization treatment is placed in the center of the tube furnace tube, and the temperature is 1 ° C / The temperature was raised to 300°C at a speed of 1 min, and the temperature was maintained for 1 hour for stabilization treatment; the stabilized polyacrylonitrile fiber was placed in the center of the tube furnace, and the temperature was raised from room temperature to 900°C at a rate of 5°C / min under the protection of argon. , keep warm for 60 minutes, and then cool down to room temperature with the furnace to obtain carbon nanofibers. The flow rate of argon gas described in step 1) is 400 sccm; the others are the same as in one of the specific embodiments 1 to 2;

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Abstract

The invention relates to preparation of a tungsten disulphide nanosphere / carbon nano fibre composite material and application thereof in detecting dopamine in an electrochemical mode, which belongs tothe technical field of novel function material and bio-sensor detection. The preparation aims to solve the problem that an existing material is high in cost, is low in metal toxicity and sensitivityand is low in selectivity while detecting dopamine. The preparation mainly comprises the following steps: I, preparing carbon nano fibres through an electrostatic spinning method; and II, preparing the tungsten disulphide nanosphere / carbon nano fibre composite material through a hydrothermal method. The tungsten disulphide nanosphere / carbon nano fibre composite material prepared by the preparationhas the advantages of great specific surface area, high conductivity, good biocompatibility and the like, and can be used as an electrode material for detecting dopamine.

Description

technical field [0001] The invention relates to the preparation of a tungsten disulfide nanosphere / carbon nanofiber composite material and electrochemical detection of dopamine. Background technique [0002] Dopamine (DA), as one of the important neurotransmitters, plays an important role in human metabolism, cardiovascular, central nervous system, kidney and hormone system functions. Low levels of DA may lead to various diseases and neurological disorders, such as schizophrenia, chronic progressive chorea and Parkinson's disease, etc. Therefore, accurate and simple detection of DA is of paramount importance. Compared with conventional methods, electrochemical methods are considered to be one of the most popular methods due to their low cost, fast response, simplicity, high sensitivity and good stability. However, the coexisting uric acid (UA) is electroactive and easily oxidized, and its potential is close to that of DA. Usually, since the basic DA concentration is very ...

Claims

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Application Information

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IPC IPC(8): C01G41/00D01F9/22G01N27/327G01N27/48
CPCC01G41/00C01P2002/72C01P2004/03C01P2006/40D01F9/22G01N27/327G01N27/48
Inventor 岳红彦吴鹏飞张腾
Owner HARBIN UNIV OF SCI & TECH
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