Graphene-poly ionic liquid composite material, and preparation method and application thereof

A technology of polyionic liquid and composite materials, which is applied in the field of graphene-polyionic liquid composite materials and its preparation, can solve the problems of affecting the detection sensitivity of electrochemical sensors, unstable performance of composite materials, and ionic liquid shedding, etc., and achieve the goal of reaction process Ease of control, increased electron transfer speed, and good stability

Inactive Publication Date: 2014-08-13
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of this carboxylated graphene oxide-ionic liquid composite nanomaterial is that in the composite material, the composite between the ionic liquid and graphene i

Method used

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  • Graphene-poly ionic liquid composite material, and preparation method and application thereof
  • Graphene-poly ionic liquid composite material, and preparation method and application thereof
  • Graphene-poly ionic liquid composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation of embodiment 1 graphene-polyionic liquid composite material

[0048] 1. Synthesis of graphene oxide

[0049] Take 0.5g graphite powder, 0.5g NaNO 3 , 23mL concentrated H 2 SO 4 , added to a 250mL round bottom flask in turn, stirred in an ice bath for 60min; then slowly added 3g KMnO 4 After mixing evenly, stir in a 35°C oil bath for 2 hours; then, slowly add 40mL of water, and when the temperature rises to 95°C, stir for 30min; finally, slowly add 100mL of water, and then add 3mL of H 2 o 2 (30%), suction filtered, washed twice with 1M hydrochloric acid and water successively, and the filtrate was dried at 45°C to obtain graphene oxide (GO).

[0050] 2. Synthesis of graphene

[0051] Take 0.1g of graphene oxide and mix it into 200mL of water, after ultrasonication at 53KHz for 2h, add 100μL of 85% hydrazine hydrate and 1.4mL of 28% concentrated ammonia water, mix well, heat and stir at 95°C for 60min, then wash with water, and filter with suction ...

Embodiment 2

[0069] The preparation of embodiment 2 electrochemical sensors

[0070] 1. Preparation of GR-PIL modified electrode

[0071] (1) The glassy carbon electrode is made of Al 2 o 3 Powder suspension polishing, followed by ultrasonic cleaning with anhydrous ethanol and ultrapure water, the frequency of each ultrasonic cleaning is 53KHz, and the time is 5min; after the ultrasonic cleaning is completed, it is placed in the air to dry for use;

[0072] (2) Disperse 5mg of graphene-polyionic liquid composite material in 1mL of N,N-dimethylformamide (the concentration of GR-PIL is 5mg / mL), after ultrasonic mixing, take 5μL of the mixed solution and drop-coat it To the surface of the glassy carbon electrode, the RGI-PIL modified electrode is obtained after drying.

[0073] 2. Electrochemical behavior analysis of GR-PIL modified electrode on PEA

[0074] Dip the GR-PIL modified electrode into blank PBS and containing 1.0×10 -5M PEA in PBS (pH=0.05, 0.5M NaCl) solution was stirred and...

Embodiment 3

[0097] Example 3 Using GR-PIL Modified Electrode for Actual Sample Detection

[0098] In order to investigate the reliability of the GR-PIL modified electrode, the actual samples were tested.

[0099] For pig liver samples or pork samples, the pretreatment method is:

[0100] (1) Mix 1.0 g of ground pig liver sample or pork sample with 5 mL of ethyl acetate and 0.6 mL of 10% Na 2 CO 3 The solution was stirred and mixed, and then centrifuged at a speed of 3500r / min to collect the organic layer;

[0101] (2) repeat step (1) twice;

[0102] (3) Add 1 mL of 0.1M HCl to the collected organic layer, shake vigorously for 2 min, then centrifuge for 5 min, and collect the lower layer;

[0103] (4) Repeat step (3) twice to collect the extract;

[0104] (5) Dilute the extract to 10 mL with PBS buffer (pH 5.0); add PEA of a certain concentration before detection to prepare a spiked sample.

[0105] For the pig urine sample, the pretreatment method is as follows: centrifuge the pig u...

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Abstract

The invention discloses a graphene-poly ionic liquid composite material, and a preparation method and application thereof. The preparation method comprises the following steps: under the protection of inert gas, conducting a free radical polymerization reaction on the graphene and an ionic liquid with ethylenic bond in the presence of an initiator; and after the reaction, washing and drying the reaction products to obtain the graphene-poly ionic liquid composite material. As the graphene-poly ionic liquid composite material has good conductivity, porous structure and high adsorption, it can be used to prepare an electrochemical sensor for detection of phenylethanolamine A. The preparation method of the invention has the advantages of simple operation, low cost and easy control of the reaction process; the obtained graphene-poly ionic liquid composite material has the advantages of high sensitivity, high stability and recyclability; and the electrochemical sensor can fast and accurately detect phenylethanolamine A.

Description

technical field [0001] The invention belongs to the technical field of electrochemical sensors, and in particular relates to a graphene-polyionic liquid composite material and its preparation method and application. Background technique [0002] Phenylethanolamine A (PEA) is a by-product of ractopamine in the synthesis process and is an isomer of formoterol. Like clenbuterol and ractopamine, it has nutrient redistribution and is a beta-receptor agonist. However, it has also been misused as a growth promoter in livestock, causing the fat in the animal to become lean, so it is considered a new type of clenbuterol. In 2010, PEA was detected in pig urine in many provinces of my country. PEA residual in pork can cause serious side effects, such as nausea, dizziness, limb weakness, hand tremor and other symptoms, especially for those with heart disease and high blood pressure. patients are at greater risk. Long-term consumption of foods containing this substance can lead to chro...

Claims

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Application Information

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IPC IPC(8): C08F230/06C08K3/04G01N27/26
Inventor 李蕾曾延波李倩张剑唐婷杜春瑶叶冰青潘样丹
Owner JIAXING UNIV
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