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Poly dopamine-modified reduced graphene oxide and preparation method and application thereof

A polydopamine and graphene technology, applied in the field of new materials, can solve problems such as unfavorable industrial production, environmental hazards, etc., and achieve the effects of good application value, low reduction temperature, and improved photothermal effect

Inactive Publication Date: 2015-03-11
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing graphene oxide reduction method mainly has the following disadvantages: the use of hydrazine reagents (such as hydrazine, dimethylhydrazine), NaBH 4 , LiAlH 4 Reagents with strong toxicity such as reductants are used as reducing agents, which are harmful to the environment and are not conducive to large-scale industrial production; when using environment-friendly reducing agents such as vitamin C and tea polyphenols, along with the hydrophilic oxygen The group is reduced, and the reduced graphene oxide is prone to agglomeration, so a stabilizer should be added during the reduction

Method used

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  • Poly dopamine-modified reduced graphene oxide and preparation method and application thereof
  • Poly dopamine-modified reduced graphene oxide and preparation method and application thereof
  • Poly dopamine-modified reduced graphene oxide and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0037] A preparation method of polydopamine-modified reduced graphene oxide, comprising the steps of:

[0038] (1) First weigh 10 mg of graphene oxide (GO) and add it into a round-bottomed flask filled with 20 mL of 10 mM Tris-Cl solution with a pH of 8.5, and ultrasonically place the round-bottomed flask in an ice-water bath for 10 minutes to make graphite oxide Alkenes are completely dissolved in Tris-Cl solution;

[0039] (2) Add 5 mg of dopamine hydrochloride (DA) to the above-mentioned round-bottomed flask, then stir and ultrasonicate the round-bottomed flask in an ice-water bath for 10 minutes to activate dopamine hydrochloride to obtain a yellow-brown reaction mixed solution;

[0040] (3) Place the above reaction mixture solution under the condition of 60° C. and vigorously stir for 24 hours;

[0041] (4) Remove the free dopamine hydrochloride by centrifuging the above reaction mixture solution (rotating speed is set to 10,000rpm / min, each wash is 20min, wash 8 times) ...

Embodiment 2

[0048] A preparation method of polydopamine-modified reduced graphene oxide, comprising the steps of:

[0049] (1) First take by weighing 10mg graphene oxide and add the concentration that 20mLpH is 9.0 is that 10mM Tris-Cl solution is housed in the round bottom flask of 10mM Tris-Cl solution at first, and this round bottom flask is ultrasonicated in ice-water bath for 10 minutes, graphene oxide is completely dissolved in In Tris-Cl solution;

[0050] (2) Add 2.5 mg of dopamine hydrochloride to the above-mentioned round-bottomed flask, then stir and ultrasonicate the round-bottomed flask in an ice-water bath for 10 minutes to activate dopamine hydrochloride to obtain a tan reaction mixed solution;

[0051] (3) Place the above reaction mixture solution under the condition of 65° C. and vigorously stir for 12 hours;

[0052] (4) Remove free dopamine hydrochloride by centrifuging the above reaction mixture solution (rotating speed is set at 10,000rpm / min, each wash is 20min, 8 t...

Embodiment 3

[0054] A preparation method of polydopamine-modified reduced graphene oxide, comprising the steps of:

[0055] (1) First take by weighing 10mg graphene oxide and add that 20mL pH is that the concentration of 8.5 is in the round-bottomed flask of 10mM Tris-Cl solution, and this round-bottomed flask is sonicated in ice-water bath for 10 minutes, graphene oxide is completely dissolved in In Tris-Cl solution;

[0056] (2) Add 10 mg of dopamine hydrochloride to the above-mentioned round-bottomed flask, then stir and ultrasonicate the round-bottomed flask in an ice-water bath for 10 minutes to activate dopamine hydrochloride to obtain a tan reaction mixed solution;

[0057] (3) Place the above reaction mixture solution under the condition of 55° C. and vigorously stir for 24 hours;

[0058] (4) Remove free dopamine hydrochloride by centrifuging the above reaction mixture solution (rotating speed is set at 10,000rpm / min, each wash is 20min, 8 times in total) to obtain polydopamine-m...

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Abstract

The invention discloses poly dopamine-modified reduced graphene oxide and a preparation method and application thereof, the polydopamine-modified reduced graphene oxide includes reduced graphene oxide and poly dopamine, and the poly dopamine is attached to the surface of the reduced graphene oxide in physical adsorption manner. The preparation method comprises the following steps: according to the mass ratio of (1-4): (1-4), weighing graphene oxide and dopamine hydrochloride, adding the graphene oxide and the dopamine hydrochloride into solvent to completely dissolve to prepare a mixed solution; adjusting the pH value of the mixed solution to 8.5-9, and reacting for 12h-24h at the temperature of 55 to 65 DEG C to obtain the poly dopamine-modified reduced graphene oxide. The preparation method is friendly to the environment, low in reduction temperature, in no need of adding a stabilizer, and simple in process, realizes the reduction and stabilization in one step, and is suitable for mass production. The invention also provides the application of the poly dopamine-modified reduced graphene oxide.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a polydopamine-modified reduced graphene oxide and its preparation method and application. Background technique [0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms; 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. The properties of this material, such as high modulus, high strength, good thermal conductivity, excellent carrier mobility and large specific surface area, make it show great promise in the fields of electronic devices, sensors, energy storage devices and composite materials. broad application prospects. At present, the preparation methods of graphene mainly include micromechanical exfoliation method, chemical vapor deposition method, epitaxial growth method, graphene oxide reduction method, organic synthesis method, ...

Claims

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Application Information

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IPC IPC(8): A61K49/00A61K41/00A61P35/00
Inventor 蔡林涛张靖楠盛宗海胡德红
Owner SHENZHEN INST OF ADVANCED TECH
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