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Preparation method of graphene-nano-zinc hydrogel electrode

A nano-zinc, hydrogel technology, applied in the field of electrochemistry, can solve problems such as unsatisfactory conductivity

Inactive Publication Date: 2018-06-01
TRULY OPTO ELECTRONICS
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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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preparation example Construction

[0031] A preparation method of graphene-nanometer zinc hydrogel electrode, comprising the following steps:

[0032] Graphene oxide solution, ZnSO 4 ·7H 2 O solution and vitamin C solution are mixed and reacted to obtain a graphene-nanometer zinc hydrogel electrode;

[0033] The concentration of the vitamin C solution is 3-6 μmol / L;

[0034] The ZnSO 4 ·7H 2 The concentration of O solution is 4-6 mg / mL;

[0035] The graphene oxide solution, ZnSO 4 ·7H 2 The volume ratio of the O solution and the vitamin C solution is (3-7): (0.1-0.3): (0.2-0.6).

[0036] In the present invention, graphene oxide solution is prepared according to the following steps:

[0037] A) graphite powder and sodium nitrate are mixed with concentrated sulfuric acid under ice bath conditions to obtain a mixed solution;

[0038] B) Potassium permanganate is added successively to the mixed solution for reaction, then deionized water is added successively to continue the reaction, pure water is added t...

Embodiment 1

[0056] Mix 2g of natural graphite powder and 1g of sodium nitrate with 45mL of concentrated sulfuric acid in an ice bath;

[0057] Slowly add 5g of potassium permanganate to the above materials one by one, keep the temperature of the materials below 20°C and stir for 2h, then continue to react at 35°C for 30min, then slowly add 90mL of deionized water to the materials one by one, and raise the temperature to Continue to react at 95°C for 3 h, add pure water to terminate the reaction, and add 5 mL of 30% H at the same time 2 o 2 , cooled to room temperature;

[0058] The resulting material is subjected to suction filtration to obtain a filter cake;

[0059] Wash the above filter cake with hydrochloric acid aqueous solution and pure water successively to remove residual metal ions and hydrochloric acid, then redisperse the washed filter cake in water, and centrifuge at 2000rpm for 10min to remove unoxidized graphite to obtain a clear liquid;

[0060] Sonicate the supernatant ...

Embodiment 2

[0066] The graphene-nanometer zinc hydrogel electrode was prepared according to the method in Example 1, except that the volume fractions of graphene oxide solution and vitamin C were 88% and 8%, respectively.

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Abstract

The invention provides a preparation method of a graphene-nano-zinc hydrogel electrode. The preparation method comprises steps as follows: a graphene oxide solution, a ZnSO4.7H2O solution and a vitamin C solution are mixed and subjected to a reaction, and the graphene-nano-zinc hydrogel electrode is obtained, wherein the concentration of the vitamin C is 3-6 mu mol / L, the concentration of the ZnSO4.7H2O solution is 4-6 mg / mL, and a volume ratio of the graphene oxide solution, the ZnSO4.7H2O solution and the vitamin C solution is (3-7):(0.1-0.3):(0.2-0.6). According to the preparation method, nano-zinc particles are introduced into graphene oxide gel, so that conductivity of the prepared graphene-nano-zinc hydrogel electrode is remarkably improved, meanwhile, nano-zinc can supply a bindingsite to a thiolated biological probe, the probe is fixed in the hydrogel electrode, and biological detection of the electrode is facilitated accordingly.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a preparation method of a graphene-nanometer zinc hydrogel electrode. Background technique [0002] The charges of graphene, graphene oxide and their reduction products make them have good dispersion, and they can also be used as functional building blocks 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; there is also a strong solid-liquid interface between porous alumina and graphene oxide aqueous solution, which promotes the rapid enrichment of graphene oxide on the surface of alumina to form graphite oxide Alkene hydrogel (Chem. Commun., 2011, 47:5771-5773). In addition, using the non-covalent interaction between DNA and graphene oxide, in situ cross-linking graphene oxide, the prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184B22F9/24B22F1/00G01N27/327
CPCG01N27/327B22F9/24C01B2204/22B22F1/054
Inventor 钟勇吴雄清余德锋
Owner TRULY OPTO ELECTRONICS
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