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CoFe2O4NWs/RGO composite nano-material, and paracetamol electrochemical sensor obtained through composite nano-material

A technology of nanocomposite materials and paracetamol, applied in the direction of material electrochemical variables, scientific instruments, analytical materials, etc., can solve the problems of low sensitivity and selectivity, poor electrode stability, etc., and achieve high sensitivity and selectivity, low detection limit , the effect of a wide range of application prospects

Active Publication Date: 2016-12-21
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of poor electrode stability, low sensitivity and low selectivity when nanocomposites are used to prepare paracetamol chemical electrodes in the prior art, the primary technical problem to be solved by the present invention is to provide a CoFe 2 o 4 NWs / RGO nanocomposites

Method used

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  • CoFe2O4NWs/RGO composite nano-material, and paracetamol electrochemical sensor obtained through composite nano-material
  • CoFe2O4NWs/RGO composite nano-material, and paracetamol electrochemical sensor obtained through composite nano-material
  • CoFe2O4NWs/RGO composite nano-material, and paracetamol electrochemical sensor obtained through composite nano-material

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Experimental program
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Effect test

Embodiment 1

[0039] Example 1CoFe 2 o 4 Preparation of NWs / RGO nanocomposites

[0040] S11. Place the graphene oxide (GO) in water for 20 minutes of ultrasonication, then add citric acid and continue ultrasonication for 30 minutes to obtain a graphene oxide (GO) dispersion;

[0041] S12. FeCl 3 ·6H 2 O and CoCl 2 ·6H 2 O joins in graphene oxide (GO) dispersion liquid, sonication 20min;

[0042] S13. Adjust the pH value to 9.5-10.5, add hydrazine, stir for 60 minutes, and age for 24 hours;

[0043] S14. CoFe obtained after centrifugation, washing and drying 2 o 4 NWs / RGO nanocomposites;

[0044] The amount ratio of graphene oxide, water and citric acid in step S11 is 25mg:25mL:2.5g;

[0045] FeCl in step S12 3 ·6H 2 O, CoCl 2 ·6H 2 The dosage ratio of O and graphene oxide (GO) dispersion liquid is 0.46g:0.2g:25mL;

[0046] The ratio of the amount of hydrazine added to the graphene oxide (GO) dispersion in step S13 is 1.0 g:25 mL.

[0047] From figure 1 In A, it can be seen ...

Embodiment 2

[0049] Embodiment 2 Preparation of Paracetamol Chemical Electrode

[0050] S21. CoFe prepared by embodiment 1 2 o 4 NWs / RGO nanocomposites were added into organic solvents and dispersed ultrasonically to obtain CoFe 2 o 4 NWs / RGO nanocomposite dispersion;

[0051] S22. The CoFe 2 o 4 The NWs / RGO nanocomposite dispersion liquid is added dropwise to the surface of the glassy carbon electrode, and dried to obtain the paracetamol chemical electrode;

[0052] The organic solvent described in step S21 is dimethylformamide (DMF), and the CoFe 2 o 4 The dosage ratio of NWs / RGO nanocomposite and dimethylformamide was 5mg:10mL.

Embodiment 3

[0053] Embodiment 3 Preparation of a paracetamol electrochemical sensor

[0054] The paracetamol chemical electrode prepared in Example 2 was used as the working electrode, the platinum wire electrode was used as the counter electrode, and the saturated calomel electrode was used as the reference electrode to form a three-electrode system. After the three-electrode system was assembled, it was connected to an electrochemical workstation to form an electrochemical sensor.

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Abstract

The invention relates to the technical field of material preparation and electroanalytical chemistry, and concretely relates to a CoFe2O4NWs / RGO composite nano-material, and a paracetamol electrochemical sensor obtained through the composite nano-material. The composite nano-material is prepared through the following steps: S11, carrying out ultrasonic treatment on graphene oxide (GO) in water for 10-30 min, adding citric acid, and continuously carrying out ultrasonic treatment for 10-60 min to obtain a GO dispersion; S12, adding FeCl3.6H2O and CoCl2.6H2O to the GO dispersion, and carrying out ultrasonic treatment for 10-60 min; S13, adjusting the pH value of the above obtained dispersion to 9.5-10.5, adding hydrazine, stirring the dispersion and hydrazine for 30-120 min, and ageing the obtained mixture for 18-48 h; and S14, centrifuging the aged mixture, washing the centrifuged mixture, and drying the washed mixture to obtain the CoFe2O4NWs / RGO composite nano-material. An electrochemical electrode or the electrochemical sensor obtained through the composite nano-material has the advantages of good stability, low detection limit, high sensitivity and high selectivity in the paracetamol detection process.

Description

technical field [0001] The invention relates to the technical field of material preparation and electroanalytical chemistry, in particular to a CoFe 2 o 4 NWs / RGO nanocomposite and its prepared electrochemical sensor for paracetamol. Background technique [0002] Paracetamol, the chemical name is paracetamol, which belongs to the acetanilides in organic compounds, and is a common antipyretic and analgesic drug. The physiological action principle of paracetamol is to mainly control the release of cyclooxygenase, and then inhibit the synthesis of prostaglandins in the hypothalamic thermoregulation center, so that the peripheral blood vessels of the human body are continuously stretched and perspired to achieve the antipyretic effect. Similar to aspirin, it is effective for mild to moderate pain. Therefore, paracetamol has a certain effect on treating or relieving cold and fever, arthralgia, neuralgia, migraine, toothache and postoperative pain. Long-term or excessive use o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/308G01N27/48
Inventor 李俊华刘梦琴张复兴许志锋邓培红唐斯萍刘兴
Owner HENGYANG NORMAL UNIV
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