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Preparation method of high-dispersion graphene-ruthenium oxide nano composite material

A nanocomposite material and graphene technology, applied in the field of electrochemistry, can solve problems such as insufficient performance advantages, low reactivity, and unfriendly environment, and achieve the effects of improving electrochemical activity, simplifying preparation methods, and large specific surface area

Inactive Publication Date: 2020-09-22
SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing materials still have problems such as low reactivity, insufficient performance advantages, and insufficient environmental friendliness.

Method used

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  • Preparation method of high-dispersion graphene-ruthenium oxide nano composite material
  • Preparation method of high-dispersion graphene-ruthenium oxide nano composite material
  • Preparation method of high-dispersion graphene-ruthenium oxide nano composite material

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Embodiment 1

[0027] A preparation method of graphene-ruthenium oxide nanocomposite material, comprising the following steps:

[0028] (1) Place citric acid and histidine in a beaker at a molar ratio of 1:1, react at 180° C. to obtain graphene quantum dots, and disperse graphene quantum dots in deionized water to obtain graphene quantum dot aqueous solution;

[0029] (2) graphene oxide is dispersed in deionized water to obtain an aqueous solution, and the graphene quantum dot aqueous solution prepared in step (1) is added under stirring, and the pH is adjusted to neutrality to obtain a compound, and the ruthenium chloride solution is added dropwise, Collect the precipitate, wash it with deionized water, and dry it to obtain a ruthenium-graphene oxide composite; graphene oxide is nano-graphene with a sheet size of 3-500nm and edges containing functional groups that can form coordination bonds with trivalent ruthenium ions; The amount of trivalent ruthenium ions in the ruthenium chloride solu...

Embodiment 2

[0033] A preparation method of graphene-ruthenium oxide nanocomposite material, comprising the following steps:

[0034] (1) Citric acid and histidine are placed in a beaker at a molar ratio of 2:3, and graphene quantum dots are obtained after reacting at 200° C., and the graphene quantum dots are dispersed in deionized water to obtain an aqueous solution of graphene quantum dots;

[0035] (2) disperse graphene oxide in deionized water to obtain an aqueous solution, add the graphene quantum dot aqueous solution prepared in step (1) under stirring, adjust the pH to neutrality and add ruthenium chloride solution dropwise, collect the precipitate, remove Washing with ionic water and drying to obtain ruthenium-graphene oxide composite; graphene oxide is nano-graphene with a sheet size of 3-500nm and edges containing functional groups that can form coordination bonds with trivalent ruthenium ions; ruthenium chloride solution The amount of trivalent ruthenium ions in the compound is...

Embodiment 3

[0039] A preparation method of graphene-ruthenium oxide nanocomposite material, comprising the following steps:

[0040] (1) Citric acid and histidine are placed in a beaker at a molar ratio of 2:1, and graphene quantum dots are obtained after reacting at 160° C., and the graphene quantum dots are dispersed in deionized water to obtain an aqueous solution of graphene quantum dots;

[0041] (2) disperse graphene oxide in deionized water to obtain an aqueous solution, add the graphene quantum dot aqueous solution prepared in step (1) under stirring, adjust the pH to neutrality and add ruthenium chloride solution dropwise, collect the precipitate, remove Washing with ionic water and drying to obtain ruthenium-graphene oxide composite; graphene oxide is nano-graphene with a sheet size of 3-500nm and edges containing functional groups that can form coordination bonds with trivalent ruthenium ions; ruthenium chloride solution The amount of trivalent ruthenium ions in the compound is...

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Abstract

The invention discloses a preparation method of a high-dispersion graphene-ruthenium oxide nano composite material and belongs to the field of electrochemistry. The preparation method comprises the following steps of preparing graphene quantum dots; dispersing graphene oxide into deionized water, adding the graphene quantum dot solution while stirring, adjusting a pH value to be neutral, dropwiseadding ruthenium source solution, collecting precipitate, washing with the deionized water, and drying to obtain a ruthenium-graphene oxide compound; calcining in a gas atmosphere to obtain a ruthenium-graphene nano composite material; and carrying out low-temperature heat treatment under an air atmosphere condition to obtain the graphene-ruthenium oxide nano composite material. The method is advantaged in that the synthesis process is simplified, small-size ruthenium oxide nanoparticles are formed and uniformly dispersed on the graphene sheet layer, and accumulation of the nanoparticles is avoided, so ruthenium oxide has a large specific surface area.

Description

technical field [0001] The invention belongs to the field of electrochemistry and relates to a preparation method of a highly dispersed graphene-ruthenium oxide nanocomposite material. Background technique [0002] Oxide materials are a large category of Faraday pseudocapacitive materials, and the oxide materials that were first recognized as supercapacitors were ruthenium dioxide and its hydrates. Trasatti et al. (1971) first proposed the RuO 2 Materials applied to electrochemical capacitors. RuO 2 The special physical and chemical properties make it a natural advantage when used as a supercapacitor material. Ruthenium dioxide has excellent conductivity, almost similar to metal conductivity, and its electronic conductivity can reach 3×10 2 S cm -1 . [0003] At present, the commonly used supercapacitor electrode materials have their own advantages and disadvantages, but it is difficult to improve the comprehensive performance of materials only by studying the structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/46B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/36H01G11/46
Inventor 杨永强李在均贺可扬王勤生
Owner SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE
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