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Preparation and application of graphene-amphiphilic pillar[5]arene-gold nanoparticles ternary nanocomposite

A technology of nanocomposite materials and gold nanoparticles, applied in the direction of material electrochemical variables, etc., can solve the problems of low detection sensitivity of spectrophotometry, toxic mobile phase, environmental pollution, etc., to achieve improved electrical analysis performance, good mechanical strength, The effect of excellent electrical conductivity

Inactive Publication Date: 2015-09-09
NANTONG VOCATIONAL COLLEGE
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Problems solved by technology

2. The dispersion uniformity of noble metal nanoparticles on the graphene surface is still a serious problem
However, high-performance liquid chromatography and high-performance liquid chromatography-mass spectrometry require expensive instruments, and most of the mobile phases used are toxic, which will cause a certain degree of pollution to the environment
However, the detection sensitivity of visible spectrophotometry is not high

Method used

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  • Preparation and application of graphene-amphiphilic pillar[5]arene-gold nanoparticles ternary nanocomposite
  • Preparation and application of graphene-amphiphilic pillar[5]arene-gold nanoparticles ternary nanocomposite
  • Preparation and application of graphene-amphiphilic pillar[5]arene-gold nanoparticles ternary nanocomposite

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Embodiment Construction

[0029] The preparation of graphene-amphiphile column [5] arene-gold nanoparticles ternary nanocomposite comprises the following steps:

[0030] 1) Preparation of graphene-pillar[5]arene nanocomposites

[0031] 10 mg of graphene oxide GO and 10 mg of amphiphilic column[5]arene P5 were mixed and dissolved in 10 ml of deionized water under ultrasonic conditions, then stirred at room temperature for 12 hours, and 100 μl of hydrazine hydrate and 200 μl of ammonia water were added to form The mixed solution was reacted at 75°C for 14h under magnetic stirring, and the obtained black dispersion was centrifuged at 10,000rpm for 20 minutes, and then washed three times with deionized water to obtain graphene-column[5]arene GN-P5 Nano-composite material, the composite material was vacuum-dried at 65°C for 48 hours to obtain GN-P5 solid powder, and then ultrasonically dispersed GN-P5 in water again to obtain a 1.0 mg / mL GN-P5 dispersion liquid for use; by experiment It can be seen that gr...

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Abstract

The invention discloses a preparation method and application of a graphene-amphiphilic column[5]arene-gold nanoparticle ternary nanocomposite. The preparation method of the nanocomposite comprises preparation of a graphene-column[5]arene nanocomposite and preparation of graphene-column[5]arene-gold nanoparticles. The synthetic method provided by the invention is simple and quick; experiments prove that an electrode modified by the graphene-column[5]arene-gold nanoparticle ternary nanocomposite is capable of synergistically promoting the electrochemical reaction of dopamine, and has a wide linear range to electrochemical detection of dopamine, namely 1.2*10<-8>-2.5*10<-5> mol.L<-1>, and also an extremely limit of detection, namely 9*10<-9> mol.L<-1>.

Description

technical field [0001] The invention specifically relates to a preparation method of graphene-column[5]arene-gold nanoparticles and its application to electrochemical detection of dopamine. Background technique [0002] The arrival of any new generation of macrocyclic hosts with fascinating properties could accelerate the development of supramolecular chemistry and open up a new avenue for materials science. Macrocyclic compounds such as crown ethers, cyclodextrins, cucurbits, calixarenes, etc., have attracted great attention of researchers due to their wide range of applications. In the past 5 years, a new generation of supramolecular host compounds pillar[n]arenes, especially pillar[5]arenes, have been actively studied and developed rapidly due to their unique structures and fascinating properties. Pillar[n]arenes are a kind of cyclic oligomers connected by hydroquinone or hydroquinone ether at the para-position of benzene ring through methylene bridge, therefore, pillar[...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48
Inventor 周君朱蓓蓓黄徽严进
Owner NANTONG VOCATIONAL COLLEGE
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