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Preparation method and application of repeatedly usable graphene ionic liquid electrode

An ionic liquid and graphene technology, which is applied in the direction of material analysis, instruments, and measuring devices by electromagnetic means, can solve the problems of weak electrocatalytic ability of bisphenol A, inconvenient electrode handling, harsh reaction conditions, etc. Handling, superior performance, reproducible results

Inactive Publication Date: 2016-08-24
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the preparation method of graphene composite material is relatively complicated, the operation process is cumbersome, and the reaction conditions are harsh; in addition, due to the irreversible catalytic oxidation process of bisphenol A on the electrode surface, a passivation film is formed on the electrode surface, making After the modified electrode is used once, it needs to be modified again, which brings inconvenience to the subsequent processing of the electrode and low detection efficiency
Zhou Ling et al. (Zhou Ling. Research on new electrochemical sensors for the detection of bisphenol A in food [D]. Zhejiang University, 2014) crushed graphite powder and OPFP ionic liquid and stuffed them into glass tubes for compaction. Put it into an oven at 80°C for 3 minutes and take it out to obtain an ionic liquid / graphite electrode. The preparation of this electrode is simple, but the electrochemical test results show that its electrocatalytic ability for bisphenol A is still relatively weak, and its oxidation peak potential is also high. About 0.78V

Method used

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  • Preparation method and application of repeatedly usable graphene ionic liquid electrode
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  • Preparation method and application of repeatedly usable graphene ionic liquid electrode

Examples

Experimental program
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Embodiment 1

[0039] Prepare mortar, silicone tube (d=2mm), syringe (capacity 2.5mL), copper wire, scotch tape, knife, ruler, etc. A solid mixture of graphene and OPFP was weighed in a total amount of 0.40 g, wherein the mass ratio of graphene to OPFP was 0.3:0.7, and the two were mixed evenly and ground for 20 min. Cut off a part of the head of the syringe needle, leaving only about 0.5cm in length. Cut out a 2.2cm silicone tube, wrap it with scotch tape until it is not easy to bend and the tape is about 0.5cm longer than the silicone tube, and then connect it to the head of the syringe needle and cover it well. Put the weighed and ground mixture sample into a syringe, and put all the materials (syringe with silicone tube, weighing paper, copper wire) into an oven at a constant temperature of 80°C for 5 minutes. In the oven, block the top of the silicone tube with weighing paper, and quickly squeeze the sample in the syringe into the silicone tube, then remove the silicone tube, and inser...

Embodiment 2

[0041] Prepare mortar, silicone tube (d=2mm), syringe (capacity 2.5mL), copper wire, scotch tape, knife, ruler, etc. A solid mixture of graphene and OPFP was weighed in a total amount of 0.40g, wherein the mass ratio of graphene to OPFP was 0.325:0.675, and the two were mixed uniformly and then ground for 20min. Cut off a part of the head of the syringe needle, leaving only about 0.5cm in length. Cut out a 2.2cm silicone tube, wrap it with scotch tape until it is not easy to bend and the tape is about 0.5cm longer than the silicone tube, and then connect it to the head of the syringe needle and cover it well. Put the weighed and ground mixture sample into a syringe, and put all the materials (syringe with silicone tube, weighing paper, copper wire) into an oven at a constant temperature of 80°C for 5 minutes. In the oven, block the top of the silicone tube with weighing paper, and quickly squeeze the sample in the syringe into the silicone tube, then remove the silicone tube,...

Embodiment 3

[0043] Prepare mortar, silicone tube (d=2mm), syringe (capacity 2.5mL), copper wire, scotch tape, knife, ruler, etc. A solid mixture of graphene and OPFP was weighed in a total amount of 0.40g, wherein the mass ratio of graphene and OPFP was 0.07:0.65, and the two were mixed uniformly and then ground for 20min. Cut off a part of the head of the syringe needle, leaving only about 0.5cm in length. Cut out a 2.2cm silicone tube, wrap it with scotch tape until it is not easy to bend and the tape is about 0.5cm longer than the silicone tube, and then connect it to the head of the syringe needle and cover it well. Put the weighed and ground mixture sample into a syringe, and put all the materials (syringe with silicone tube, weighing paper, copper wire) into an oven at a constant temperature of 80°C for 5 minutes. In the oven, block the top of the silicone tube with weighing paper, and quickly squeeze the sample in the syringe into the silicone tube, then remove the silicone tube, ...

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Abstract

The invention discloses a preparation method and application of a repeatedly usable graphene ionic liquid electrode, and relates to a graphene ionic liquid electrode. The preparation method comprises the following steps: 1) mixing graphene with N-octyl pyridine hexafluorine, and grinding so as to obtain a graphene and ionic liquid mixture; 2) filling the graphene and ionic liquid mixture obtained in the step 1) into an injector, and drying; 3) cooling, subsequently polishing one end of a silicone tube by using pan paper till the surface is smooth and flat, thereby obtaining the repeatedly usable graphene ionic liquid electrode. The repeatedly usable graphene ionic liquid electrode can be applied to bisphenol A detection. The preparation method is relatively simple, the performance is relatively excellent, and application of a carbon paste electrode in constructing an electrochemical sensor is effectively promoted. The repeatedly usable graphene ionic liquid electrode is very applicable to analysis and detection on electric active substances on the surface of an electrode which is easy to passivate.

Description

technical field [0001] The invention relates to a graphene ionic liquid electrode, in particular to a preparation method and application of a reusable graphene ionic liquid electrode. Background technique [0002] Enzyme-free electrochemical sensors have the advantages of high sensitivity and easy miniaturization. Since they do not use biologically active substances, they are less affected by external environments such as temperature and pH, and are currently a research hotspot in the field of sensing. Enzyme-free sensors are based on the interaction between electrode materials and detection objects, so the selection of electrode materials and their efficient assembly on electrodes greatly affect the detection performance of enzyme-free sensors. Traditional modified electrodes use film coating method or chemical bonding method to modify some highly electroactive materials on the electrode surface, so that the modified electrode exhibits better electrocatalytic performance an...

Claims

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Application Information

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IPC IPC(8): G01N27/333
CPCG01N27/333
Inventor 陈晓梅马颖王坚坚黄志勇
Owner JIMEI UNIV
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