Preparation method and application of reduced graphene oxide

A graphene and allyl-based technology, applied in the field of preparation of reduced graphene oxide, can solve the problems of low preparation efficiency, use of toxic and corrosive solvents, etc., achieve high specific capacity, simple method, and easy-to-obtain raw materials

Inactive Publication Date: 2015-08-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Common reduction methods include thermal reduction, chemical reduction, etc., but these methods currently have the disadvantages of low preparation efficiency and the use of toxic and corrosive solvents in the reduction process, which cannot meet the requirements of the development of green chemistry.

Method used

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  • Preparation method and application of reduced graphene oxide
  • Preparation method and application of reduced graphene oxide
  • Preparation method and application of reduced graphene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 150mg graphene oxide to 20ml BMIMHSO 4 ionic liquid solution of graphene oxide was obtained by ultrasonic dispersion at 40°C for 4 h. The solution was poured into a polytetrafluoro reactor, and placed in an oven at 180° C. for 12 hours to obtain a reduced graphene oxide gel. After the gel was washed with water or ethanol, it was dried in a freeze dryer for 24 hours to obtain reduced graphene oxide.

[0020] The structure was confirmed by X-ray powder diffractometer analysis, such as figure 1 The graphene oxide shown has been reduced with an interlayer spacing of 0.368 nm

[0021] The morphology of the obtained reduced graphene oxide was characterized by scanning electron microscopy. Such as figure 2 As shown, the reduced graphene oxide was exfoliated after an ionothermal process, showing a sheet-like structure.

[0022] Electrochemical performance characterization of reduced graphene oxide:

[0023] The prepared reduced graphene oxide (rGO) was directly press...

Embodiment 2

[0026] Add 100mg graphene oxide to 10ml EMIMHSO 4 , ultrasonically dispersed at 30°C for 3 h to obtain an ionic liquid solution of graphene oxide. The solution was poured into a polytetrafluoro reactor, and placed in an oven at 180° C. for 12 hours to obtain a reduced graphene oxide gel. After the gel was washed with water or ethanol, it was dried in a freeze dryer for 24 hours to obtain reduced graphene oxide.

[0027] The structure, morphology and electrochemical properties of the reduced graphene oxide are the same as in Example 1. 5mV s -1 The results of the electrochemical performance tests are listed in Table 1.

Embodiment 3

[0029] Add 100mg graphene oxide to 15ml AMIMH 2 PO 4 In the process, the ionic liquid solution of graphene oxide was obtained by ultrasonic dispersion at 30°C for 2 h. The solution was poured into a polytetrafluoro reactor, and placed in an oven at 160° C. for 10 h to obtain a reduced graphene oxide gel. After the gel was washed with water or ethanol, it was dried in a freeze dryer for 24 hours to obtain reduced graphene oxide.

[0030] The structure, morphology and electrochemical properties of the reduced graphene oxide are the same as in Example 1. 5mV s -1 The results of the electrochemical performance tests are listed in Table 1.

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Abstract

The invention discloses a preparation method and an application of reduced graphene oxide. The reduced graphene oxide is prepared through an ionothermal technology. The method comprises the following steps: adding graphene oxide into an ionic liquid, carrying out ultrasonic dispersion to obtain an ionic liquid solution of graphene oxide, heating the solution to 150-220DEGC, reacting for 6-30h, cleaning, and freeze-drying to obtain the reduced graphene oxide. The preparation method has the advantages of simplicity, no pollution and high practicality degree, and the obtained reduced graphene oxide can be directly used as a super capacitor electrode material.

Description

technical field [0001] The invention relates to a preparation method of reduced graphene oxide, which has simple process, is green and pollution-free, and has a high degree of practicality, and the obtained reduced graphene oxide can be directly used as an electrode material of a supercapacitor. Background technique [0002] Graphene is composed of single layer sp 2 A two-dimensional honeycomb crystal material composed of hybrid carbon atoms, with a thickness of only 0.34nm. Because of its high specific surface area, good chemical stability, excellent electrical conductivity and thermal conductivity, it has great application prospects in the fields of electronics, biomedicine, information and energy. How to prepare high-quality graphene on a large scale is an urgent problem to be solved. At present, the preparation methods of graphene mainly include mechanical exfoliation of graphite, chemical vapor deposition, pyrolytic SiC epitaxial growth, chemical reduction of graphene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04H01G11/34
CPCY02E60/13
Inventor 颜洋郝晓凤牟文生
Owner DALIAN UNIV OF TECH
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