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Graphene oxide stabilizing reagent, dispersion system and preparation method of dispersion system

A dispersion system and graphene technology, applied in the field of analytical chemistry, can solve problems such as increased work complexity and sedimentation, and achieve good stability, poor dispersion, and simple preparation

Active Publication Date: 2021-03-02
BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the study found that although the stability of the dispersion solution system prepared by commercially available GO is higher than that of the GR dispersion system, sedimentation still occurs, and repeated ultrasonic treatment is required during use, which increases the tediousness of the work. The GO dispersion system prepared by the reagents and methods still suffers from sedimentation

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  • Graphene oxide stabilizing reagent, dispersion system and preparation method of dispersion system
  • Graphene oxide stabilizing reagent, dispersion system and preparation method of dispersion system
  • Graphene oxide stabilizing reagent, dispersion system and preparation method of dispersion system

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preparation example Construction

[0026] According to the embodiments provided by the present invention, the preparation method of the stabilized graphene oxide dispersion system comprises the following steps:

[0027] a) Preparation of graphene oxide stabilization solution

[0028] Take a certain amount of stabilizing reagent (stabilizing reagent is selected from sodium hydroxide, Na 2 CO 3 , magnesium sulfate, sodium phosphate, sodium acetate, potassium chloride, ammonia water, ammonium chloride, sodium dihydrogen phosphate, magnesium chloride, hydrochloric acid, one or more of ammonium sulfate), dissolved in ultrapure water, and vortexed Mix well, adjust the pH value of the solution system to 4-11 with a pH meter, mix again with a vortex instrument, seal it at room temperature for later use, and record it as W solution;

[0029] b) Preparation of graphene oxide solution system

[0030] Weigh a certain amount of graphene oxide and place it in a 15ml centrifuge tube, add an appropriate amount of ultrapure ...

Embodiment 1

[0034] 1) Preparation of graphene oxide stabilization solution

[0035] Weigh 0.05g of sodium dihydrogen phosphate, 0.05g of disodium hydrogen phosphate, 0.01g of sodium chloride, and 0.01g of potassium chloride, dissolve them in ultrapure water, mix them with a vortex instrument, and adjust the pH value of the solution system with sodium hydroxide solution 8, mix again with a vortex instrument to obtain a stabilized solution with a pH of 8, seal it at room temperature, and set aside.

[0036] 2) Preparation of graphene oxide solution system

[0037] Weigh 0.1 mg of commercial graphene oxide into a 1 ml centrifuge tube, add 1 ml of ultrapure water, then use ultrasonic treatment for 60 min, vortex mixing for 5 min, and seal at room temperature for later use.

[0038] 3) Preparation of stabilized graphene oxide dispersion system

[0039]Take an appropriate amount of the prepared W solution, add it to the prepared G solution system, ultrasonically treat for 5-120 minutes, adjus...

experiment example 1

[0040] Experimental Example 1 Effect of Ultrasonic on Graphene Oxide Dispersion System

[0041] Table 1 Effect of different ultrasonic time on the stability of graphene oxide dispersion system

[0042] Ultrasonic time / min 0 5 10 30 60 120 days stability settlement settlement settlement dispersion dispersion

[0043] The result shows, adopts the graphene oxide dispersion system prepared by the present invention, after 30-60min after ultrasonic treatment, the graphene oxide dispersion system does not have sedimentation phenomenon in 120 days, presents good dispersion properties, shows that ultrasonic action is to graphite oxide solution The system has a stabilizing effect.

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Abstract

The invention provides a graphene oxide stabilizing reagent, a dispersion system and a preparation method of the dispersion system. The graphene oxide stabilizing reagent is prepared from one or moreof sodium hydroxide, sodium carbonate, magnesium sulfate, sodium phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate, sodium acetate, potassium chloride, ammonia water, citric acid, sodium citrate, EDTA, ammonium chloride, magnesium chloride, hydrochloric acid and ammonium sulfate, wherein the pH value of the graphene oxide stabilizing reagent is 4-11. According to the graphene oxide stabilizing reagent stable solution prepared by the invention, the stability of a graphene oxide dispersion system can be improved, so that the super-strong dispersion stability of the graphene oxide dispersion system is realized.

Description

technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to a graphene oxide stabilizing agent, a dispersion system and a preparation method thereof. Background technique [0002] With the rapid development of material science, nanomaterials with unique chemical and physical properties such as large specific surface area, strong stability, superior electrical conductivity, and good biocompatibility, such as carbon nanotubes (CNT), graphene (GR), Graphene oxide (GO) and others are increasingly used in interface chemistry, especially in the application of electrochemical interface modification. where GR is a carbon atom with sp 2 Hybrid orbitals form hexagonal monoatomic layer two-dimensional carbon nanomaterials. Compared with other carbon nanomaterials such as CNT and GO, GR has stronger electrical conductivity and a larger specific surface area (about twice that of CNT). , making it more capable of loading biomolecules (en...

Claims

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Application Information

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IPC IPC(8): C01B32/198
CPCC01B32/198
Inventor 梁刚巩文雯贾文珅李冰茹潘立刚
Owner BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES