Preparing method for graphene-nanogold hydrogel electrode

A nano-gold and hydrogel technology, applied in the field of electrochemistry, can solve problems such as unsatisfactory electrical conductivity, and achieve the effect of being beneficial to biological detection and improving electrical conductivity

Inactive Publication Date: 2016-06-22
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Graphene oxide hydrogel electrodes can be used for ultrasensitive detection of biomacromolecules such as DNA (Adv.Funct.Mater.2014,24,6905–6913), but the graphene oxide hydrogel electrodes in the prior art Conductivity is still not ideal

Method used

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  • Preparing method for graphene-nanogold hydrogel electrode
  • Preparing method for graphene-nanogold hydrogel electrode
  • Preparing method for graphene-nanogold hydrogel electrode

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Experimental program
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Embodiment 1

[0030] (1) Preparation of graphene oxide aqueous solution:

[0031] a. Add 2g of natural graphite powder and 1g of sodium nitrate to the flask and mix them with 46mL of concentrated sulfuric acid under ice bath conditions;

[0032] b. Slowly add 6g potassium permanganate to the material in step a above, keep the temperature of the material below 20℃ and stir for 2h, then continue the reaction at 35℃ for 30min, then slowly add 92mL deionized water to the material , Increase the temperature to 95℃ and continue the reaction for 3h, add 400mL pure water to terminate the reaction, and add 6mL30%H at the same time 2 O 2 , Cool to room temperature;

[0033] c. Suction filtration of the material obtained in step b to obtain a filter cake;

[0034] d. Wash the filter cake repeatedly with 100 mL of hydrochloric acid aqueous solution (hydrochloric acid: water = 1:10) and a large amount of pure water to remove residual metal ions and hydrochloric acid, and then re-disperse the washed filter cake ...

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Abstract

The invention discloses a preparing method for a graphene-nanogold hydrogel electrode. The preparing method includes the following steps that 1, a graphene oxide water solution is prepared; 2, a shell of the graphene-nanogold hydrogel electrode is manufactured; 3, the graphene oxide water solution, chloroauric acid and sodium borohydride are added into the shell to prepare the graphene-nanogold hydrogel electrode. According to the preparing method, nanogold particles are introduced into graphene oxide gel, so that the conductivity of the prepared graphene-nanogold hydrogel electrode is improved substantially, meanwhile, binding sites of a sulfhydrylated bioprobe can be provided by nanogold, and the probe is fixed to the hydrogel electrode, which is beneficial for biological detection of the electrode.

Description

Technical field [0001] The invention belongs to the technical field of electrochemistry, and specifically relates to a method for preparing a graphene-nano gold hydrogel electrode. Background technique [0002] The charge of graphene, graphene oxide and its reduction products makes it have good dispersibility, and can also be used as a functional building unit through non-covalent interactions, such as van der Waals forces, hydrogen bonds, π-π interactions, and electrostatic interactions Etc., self-assembled or co-assembled with other functional building units to form hydrogels; also with the help of the strong solid-liquid interface between porous alumina and graphene oxide aqueous solution to promote the rapid enrichment of graphene oxide on the surface of alumina to form graphite oxide Ene hydrogel (Chem. Commun., 2011, 47:5771-5773). In addition, using the non-covalent interaction between DNA and graphene oxide to cross-link graphene oxide in situ, the prepared graphene oxid...

Claims

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Application Information

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IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 孙莉萍钟勇
Owner XIAMEN UNIV
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