Nickel-cobalt alloy/polypyrrole/reduced graphene nanometer composite material and application thereof

A nanocomposite material, nickel-cobalt alloy technology, applied in the field of electrochemistry, can solve the problem of low water solubility, and achieve the effect of low cost, easy operation, and simple electrode preparation process

Inactive Publication Date: 2016-05-11
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polypyrrole is a kind of conductive polymer. It has good environmental stability, biocompatibility, high electronic conductivity and other special properties. The main disadvantage is low water solubility.

Method used

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  • Nickel-cobalt alloy/polypyrrole/reduced graphene nanometer composite material and application thereof
  • Nickel-cobalt alloy/polypyrrole/reduced graphene nanometer composite material and application thereof
  • Nickel-cobalt alloy/polypyrrole/reduced graphene nanometer composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First, weigh 0.05 g of graphite oxide and ultrasonically disperse it in water to form 2 mg·mL -1 of aqueous solution. Then suck 25 μL of pyrrole monomer and slowly add it into the above aqueous solution for sonication. After 40 min, 10 mL containing 0.3022 g of ferric chloride was added dropwise into the mixture and continued to sonicate for 0.5 h. The polypyrrole / graphene composite was obtained by washing and drying for the next step of preparation.

[0038] First, 12.5 mg of polypyrrole / graphene composite was ultrasonically dispersed in 38 mL of ethylene glycol solution. After 30 min, 18.72 mg of nickel chloride and 6.34 mg of cobalt chloride were added to continue ultrasonication to make it uniform. Pass N before heating in water bath 2 Oxygen was removed, then the temperature was gradually raised to 100°C, and hydrazine hydrate was added dropwise to reduce the nickel-cobalt particles. After continuing to react and reflux for 1 hour, cool naturally, wash and dry ...

Embodiment 2

[0042] First, weigh 0.05 g of graphite oxide and ultrasonically disperse it in water to form 2 mg·mL -1of aqueous solution. Then draw 50 μL of pyrrole monomer and slowly add it into the above aqueous solution for sonication. After 40 minutes, 10 mL containing 0.6044 g of ferric chloride was added dropwise to the mixture and continued to be ultrasonicated for 0.5 h. After washing and drying, the polypyrrole / graphene composite was obtained for the next step of preparation.

[0043] First, 12.5 mg of polypyrrole / graphene composite was ultrasonically dispersed in 38 mL of ethylene glycol solution. After 30 minutes, 17.06 mg of nickel chloride and 8.54 mg of cobalt chloride were added to continue ultrasonication to make it uniform. Pass N before heating in water bath 2 Oxygen was removed, then the temperature was gradually raised to 110°C, and hydrazine hydrate was added dropwise to reduce the nickel-cobalt particles. After continuing to react and reflux for 1 hour, cool natural...

Embodiment 3

[0046] In the specific measurement, the glassy carbon electrode modified by the nickel-cobalt alloy / polypyrrole / reduced graphene nanocomposite prepared in Example 1 was used as the working electrode, the saturated calomel electrode was used as the reference electrode, and the platinum electrode was used as the auxiliary electrode. The electrolyte is 10mL of 0.1mol / L NaOH solution.

[0047] According to the preparation method of Example 1, the polypyrrole / reduced graphene nanocomposite material and the nickel-cobalt alloy nanocomposite material were prepared respectively. The composite material and the nickel-cobalt alloy nanocomposite material were respectively coated on the glassy carbon electrode, and the catalytic performance of each modified electrode on glucose was tested.

[0048] Such as Figure 5 As shown in the cyclic voltammogram, compared to polypyrrole / reduced graphene nanocomposite (curve a), nickel-cobalt alloy nanocomposite (curve b), nickel-cobalt alloy / polypy...

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Abstract

The invention discloses a nickel-cobalt alloy/polypyrrole/reduced graphene nanometer composite material and an application thereof. A method for preparing the composite material includes the steps that 1, a pyrrole monomer, graphite oxide and a reducing agent are prepared into a polypyrrole/reduced graphene nanometer composite with the in-situ polymerization method; 2, the polypyrrole/reduced graphene nanometer composite prepared in the step 1 is taken and dispersed into ethylene glycol, then nickel salt and cobalt salt are added, and the mixture is heated, reacted, washed and dried to obtain the nickel-cobalt alloy/polypyrrole/reduced graphene nanometer composite material. As polypyrrole and reduced graphene are combined, the agglomeration defect of graphene is overcome, electrical conductivity is improved, and a unique three-dimensional surface structure is formed. The composite material serves as a substrate material, more nickel-cobalt alloy particles can be more evenly adsorbed, an excellent electrochemical catalysis response is shown in the application to a glucose sensor accordingly, and a novel enzyme-free glucose sensor is configured.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and specifically relates to a nickel-cobalt alloy / polypyrrole / reduced graphene nanocomposite material and an application thereof. Background technique [0002] In recent years, various nanostructured metals, alloys and metal oxides have been widely used in the preparation of non-enzymatic glucose sensors due to their superior catalytic properties. Such sensors are easy to prepare, high in sensitivity and good in stability. Moreover, the price is low, and it has become a hot spot in the research field of glucose electrochemical sensors. Among these catalysts, nickel-based nanomaterials have a good catalytic effect on glucose. It is well known that the combination of different metals can greatly improve the catalytic effect of electrode materials, so metal alloy nanostructures have become one of the superior electrode materials. For nickel-based alloys, since metal cobalt and nickel have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/26
CPCG01N27/26G01N27/308
Inventor 盛庆林刘朵武倩王燕郑建斌
Owner NORTHWEST UNIV(CN)
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