Graphene oxide quantum dot as well as preparation method and application thereof as corrosion inhibitor

A technology of graphene quantum dots and graphite rods, which is applied in the field of graphene oxide quantum dots and its preparation, can solve the problems of corrosion inhibitor toxicity, environmental pollution, water eutrophication, etc., to hinder corrosion factors and reduce metal corrosion rate , the effect of good solution dispersion

Active Publication Date: 2019-05-17
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention solves the technical problem of eutrophication of water quality and environmental pollution caused by corrosion inhibitors in the prior art, as well as the toxicity problem of corrosion inhibitors

Method used

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  • Graphene oxide quantum dot as well as preparation method and application thereof as corrosion inhibitor
  • Graphene oxide quantum dot as well as preparation method and application thereof as corrosion inhibitor
  • Graphene oxide quantum dot as well as preparation method and application thereof as corrosion inhibitor

Examples

Experimental program
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Effect test

Embodiment 1

[0026] With a particle size of 43μm and a density of 1.7g / cm 3 The graphite rod is used as the working electrode and the auxiliary electrode, the electrolyte is 0.4mol / L ammonium citrate aqueous solution, at 40°C, the electrolysis voltage is 4V, and the electrolysis time is 8h. At the end of the reaction, the electrolyte was brown. After filtering through a 0.22 μm filter membrane, it was purified by dialysis and deionized water for 72 hours. The graphene oxide quantum dots prepared in Example 1 were obtained after rotary evaporation, concentration and drying.

Embodiment 2

[0028] With a particle size of 800μm and a density of 1.72g / cm 3 The graphite rod is used as the working electrode and the auxiliary electrode, the electrolyte is 0.3mol / L ammonium tartrate aqueous solution, at 20°C, the electrolysis voltage is 9V, and the electrolysis time is 12h. At the end of the reaction, the electrolyte was dark brown. After filtering through a 0.22 μm filter membrane, it was purified by dialysis and deionized water for 72 hours, and the graphene oxide quantum dots prepared in Example 2 were obtained after rotary evaporation, concentration and drying.

Embodiment 3

[0030] With a particle size of 43μm and a density of 1.7g / cm 3 The graphite rod is used as the working electrode and the auxiliary electrode, the electrolyte is 0.2mol / L ammonium hydroxypropionate aqueous solution, at 10°C, the electrolysis voltage is 12V, and the electrolysis time is 24h. At the end of the reaction, the electrolyte solution was brown. After filtering through a 0.22 μm filter membrane, it was purified by dialysis and deionized water for 72 hours, and the graphene oxide quantum dots prepared in Example 3 were obtained after rotary evaporation, concentration and drying.

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Abstract

The invention discloses a graphene oxide quantum dot as well as a preparation method and application thereof as a corrosion inhibitor, and belongs to the technical field of the corrosion inhibitor. The preparation method comprises the following steps: taking a graphite bar as a positive electrode and a noble electrode as a negative electrode; using an ammonium salt aqueous solution of hydroxyl-containing organic carboxylic acid as electrolyte, and electrolyzing at constant voltage; filtering the electrolyte after completing the electrolyzing by using a microfiltration membrane, carrying out dialysis purification on filtrate through deionized water, and drying, thus obtaining the graphene oxide quantum dot. The graphene oxide quantum dot disclosed by the invention has good dispersity in anaqueous solution; the preparation method disclosed by the invention is simple, green and environment-friendly, and the graphene oxide quantum dot has a good corrosion prevention effect on a carbon steel material in an acidic solution.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibitors, and in particular relates to a graphene oxide quantum dot, a preparation method thereof and an application as a corrosion inhibitor. Background technique [0002] Metal corrosion is almost everywhere, resulting in a great waste of resources and potential safety hazards. Although the phenomenon of metal corrosion cannot be avoided, by studying the mechanism of metal corrosion, we can take effective methods to reduce the rate of metal corrosion. The method of corrosion inhibitor is one of the important means of metal corrosion protection. Graphene has a variety of excellent properties. Its good chemical inertness, barrier properties to standard gas molecules, and high hydrophobicity make it applicable in the field of metal corrosion protection. Patent 201621141598.7 uses graphene to contain H 2 SO 4 and HNO 3 The graphene quantum dots with uniform carbon-to-oxygen ratio and spectra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C23F11/18B82Y40/00
Inventor 付朝阳王梦甘慧
Owner HUAZHONG UNIV OF SCI & TECH
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